/* =========================================================
   申博娱乐会馆 · 共享样式表  /assets/site.css
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body { margin: 0; }

h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }

ul, ol { list-style: none; padding: 0; }

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

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

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

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

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

[hidden] { display: none !important; }

/* ---------- 2. Design tokens ---------- */
:root {
  /* 色彩 */
  --ink:        #0B1B2B;
  --ink-deep:   #081524;
  --ink-mid:    #12293F;
  --ink-lift:   #1C3B57;
  --gold:       #C9A24A;
  --gold-soft:  #E7CE8E;
  --coral:      #E2594A;
  --jade:       #4FB3A6;
  --paper:      #F4F1EA;
  --muted:      #A9B7C4;
  --line:       #3A4A5A;

  /* 字体 */
  --font-display: "Noto Serif SC", "LXGW WenKai", "Songti SC", "STSong", "SimSun", serif;
  --font-body: Inter, "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  /* 字号阶梯 12 / 14 / 16 / 18 / 24 / 32 / 44 / 64 */
  --fs-1: 12px;
  --fs-2: 14px;
  --fs-3: 16px;
  --fs-4: 18px;
  --fs-5: clamp(20px, 1.5rem, 24px);
  --fs-6: clamp(26px, 2rem, 32px);
  --fs-7: clamp(32px, 2.75rem, 44px);
  --fs-8: clamp(32px, 4rem, 64px);

  /* 布局 */
  --shell:   1400px;
  --pad:     clamp(20px, 4.5vw, 72px);
  --gap:     clamp(20px, 3vw, 32px);
  --track:   88px;
  --track-h: 56px;
  --read:    74ch;

  /* 形状 */
  --r-sm: 4px;
  --r-lg: 12px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur:  220ms;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink);
  background-image:
    radial-gradient(80rem 40rem at 78% -6rem, rgba(201, 162, 74, 0.12), transparent 62%),
    radial-gradient(60rem 36rem at -12% 100%, rgba(79, 179, 166, 0.09), transparent 60%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--fs-3);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

h1 { font-size: var(--fs-8); font-weight: 700; }

strong { color: var(--paper); font-weight: 600; }

::selection { background: rgba(201, 162, 74, 0.35); color: #fff; }

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 400;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  background: var(--gold);
  color: var(--ink);
  font-size: var(--fs-2);
  font-weight: 600;
  border-radius: var(--r-sm);
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 16px; }

.sr-only {
  position: absolute;
  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;
}

/* ---------- 4. 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.stack > * + * { margin-top: var(--flow, 1.25em); }
.stack--lg { --flow: clamp(28px, 4vw, 52px); }

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

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }

.span-4  { grid-column: span 4; }
.span-5  { grid-column: span 5; }
.span-6  { grid-column: span 6; }
.span-7  { grid-column: span 7; }
.span-8  { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ---------- 5. 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--paper);
  --btn-bd: var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--btn-bd);
  border-radius: var(--r-sm);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--fs-2);
  font-weight: 500;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition:
    transform var(--dur) var(--ease),
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--gold {
  --btn-bg: linear-gradient(180deg, #D8B463, #C9A24A);
  --btn-fg: #0B1B2B;
  --btn-bd: #C9A24A;
  font-weight: 600;
}
.btn--gold:hover {
  box-shadow: 0 0 0 4px rgba(201, 162, 74, 0.18), 0 10px 22px -10px rgba(201, 162, 74, 0.55);
}

.btn--ghost { --btn-fg: var(--paper); --btn-bd: var(--line); }
.btn--ghost:hover { --btn-bd: var(--gold-soft); --btn-fg: var(--gold-soft); }

.btn--jade { --btn-fg: var(--jade); --btn-bd: rgba(79, 179, 166, 0.5); }
.btn--jade:hover { --btn-bd: var(--jade); box-shadow: 0 0 0 4px rgba(79, 179, 166, 0.14); }

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 27, 43, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(201, 162, 74, 0.16);
}

.header-ribbon {
  background: linear-gradient(90deg, rgba(18, 41, 63, 0.95), rgba(11, 27, 43, 0.65));
  border-bottom: 1px solid rgba(58, 74, 90, 0.7);
}

.header-ribbon__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 38px;
  font-size: var(--fs-1);
  letter-spacing: 0.16em;
  color: var(--muted);
}

.ribbon-note {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--gold-soft);
  white-space: nowrap;
}

.ribbon-pip {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 74, 0.18);
}

.ribbon-links { display: flex; align-items: center; gap: 22px; }

.ribbon-links a {
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}
.ribbon-links a:hover { color: var(--gold-soft); }

.header-main__inner {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 44px);
  min-height: 78px;
  padding-block: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.brand__mark {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: var(--r-sm);
  background: linear-gradient(160deg, rgba(201, 162, 74, 0.18), rgba(201, 162, 74, 0));
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}

.brand__text { display: flex; flex-direction: column; line-height: 1.28; }

.brand__name {
  font-family: var(--font-display);
  font-size: var(--fs-5);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.brand__sub {
  font-size: var(--fs-1);
  letter-spacing: 0.22em;
  color: var(--muted);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 30px);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  flex-wrap: wrap;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 10px 2px;
  font-size: var(--fs-2);
  letter-spacing: 0.04em;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-list a:hover { color: var(--paper); }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-list a[aria-current="page"] { color: var(--gold-soft); }
.nav-list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold-soft);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: clamp(14px, 2vw, 28px);
  border-left: 1px solid var(--line);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--paper);
  font-size: var(--fs-2);
  letter-spacing: 0.08em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--gold-soft); color: var(--gold-soft); }

.nav-toggle__bars { display: flex; flex-direction: column; gap: 4px; }

.nav-toggle__bars span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--gold);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0) 0%, rgba(8, 21, 36, 0.6) 100%), var(--ink-mid);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.55;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(260px, 1.5fr) repeat(3, minmax(140px, 1fr));
  gap: clamp(28px, 4vw, 64px);
  padding-block: clamp(48px, 7vw, 88px);
}

.footer-wordmark {
  font-family: var(--font-display);
  font-size: var(--fs-6);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.footer-tagline {
  margin-top: 8px;
  font-size: var(--fs-1);
  letter-spacing: 0.24em;
  color: var(--gold);
}

.footer-note {
  margin-top: 20px;
  max-width: 46ch;
  font-size: var(--fs-2);
  line-height: 1.9;
  color: var(--muted);
}

.footer-col__title {
  font-family: var(--font-body);
  font-size: var(--fs-1);
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--gold-soft);
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.footer-links { display: flex; flex-direction: column; gap: 10px; }

.footer-links a {
  display: inline-block;
  font-size: var(--fs-2);
  color: var(--muted);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.footer-links a:hover { color: var(--gold-soft); padding-left: 6px; }
.footer-links a[aria-current="page"] { color: var(--gold-soft); }

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

.footer-contact li { display: flex; gap: 10px; align-items: baseline; }

.footer-contact__k {
  flex: 0 0 auto;
  font-size: var(--fs-1);
  letter-spacing: 0.14em;
  color: var(--jade);
  padding-top: 3px;
}

.footer-contact__v {
  font-size: var(--fs-2);
  line-height: 1.8;
  color: var(--muted);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 32px;
  padding-block: 24px 34px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.footer-closing { color: var(--paper); }
.footer-legal { font-variant-numeric: tabular-nums; }
.footer-icp { font-variant-numeric: tabular-nums; color: var(--muted); }

/* ---------- 8. 通用内容组件 ---------- */
.band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-mid);
  padding-block: clamp(22px, 3vw, 34px);
}

.band--paper {
  background: var(--paper);
  border-color: rgba(58, 74, 90, 0.35);
  color: var(--ink);
}
.band--paper h2, .band--paper h3, .band--paper strong { color: var(--ink); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-1);
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}
.eyebrow--jade { color: var(--jade); }
.eyebrow--coral { color: var(--coral); }

.panel {
  position: relative;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(28, 59, 87, 0.72), rgba(18, 41, 63, 0.72));
  box-shadow:
    inset 0 1px 0 rgba(244, 241, 234, 0.04),
    0 18px 40px -30px rgba(0, 0, 0, 0.9);
  transition:
    transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.panel:hover {
  transform: translateY(-2px);
  border-color: rgba(201, 162, 74, 0.45);
  box-shadow:
    inset 0 1px 0 rgba(244, 241, 234, 0.06),
    0 26px 52px -32px rgba(0, 0, 0, 1);
}

.panel__title {
  font-family: var(--font-display);
  font-size: var(--fs-5);
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.panel--paper {
  background: var(--paper);
  border-color: rgba(58, 74, 90, 0.35);
  color: var(--ink);
}
.panel--paper .panel__title { color: var(--ink); }
.panel--paper p { color: #3E4A57; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(11, 27, 43, 0.55);
  font-size: var(--fs-1);
  letter-spacing: 0.14em;
  color: var(--muted);
  white-space: nowrap;
}
.tag--gold  { color: var(--gold-soft); border-color: rgba(201, 162, 74, 0.45); }
.tag--jade  { color: var(--jade); border-color: rgba(79, 179, 166, 0.45); }
.tag--coral { color: var(--coral); border-color: rgba(226, 89, 74, 0.45); }

.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.timeline__node {
  position: relative;
  padding-bottom: 32px;
}
.timeline__node:last-child { padding-bottom: 0; }

.timeline__node::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--gold);
  border-radius: 2px;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.timeline__node:hover::before { background: var(--gold-soft); }

.timeline__node.is-current::before {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 74, 0.18);
}

.fold {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(18, 41, 63, 0.6);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}
.fold + .fold { margin-top: 12px; }
.fold:hover { border-color: rgba(79, 179, 166, 0.45); }
.fold[open] { border-color: rgba(79, 179, 166, 0.5); }

.fold__summary {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 56px;
  padding: 16px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: var(--fs-4);
  font-weight: 600;
  color: var(--paper);
}
.fold__summary::-webkit-details-marker { display: none; }

.fold__summary::after {
  content: "";
  flex: 0 0 auto;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--jade);
  border-bottom: 1px solid var(--jade);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.fold[open] > .fold__summary::after { transform: rotate(225deg); }

.fold__body {
  padding: 0 22px 24px;
  font-size: var(--fs-3);
  line-height: 1.9;
  color: var(--muted);
}

.fold[open] > .fold__body { animation: foldIn 220ms var(--ease) both; }

@keyframes foldIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(28, 59, 87, 0.9), rgba(11, 27, 43, 0.9));
  aspect-ratio: 16 / 9;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--4-3  { aspect-ratio: 4 / 3; }
.media--1-1  { aspect-ratio: 1 / 1; }
.media--3-4  { aspect-ratio: 3 / 4; }
.media--21-9 { aspect-ratio: 21 / 9; }

.media--empty::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(201, 162, 74, 0.08) 0 1px,
    transparent 1px 14px
  );
}

.media figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 18px;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0), rgba(11, 27, 43, 0.88));
  font-size: var(--fs-1);
  letter-spacing: 0.12em;
  color: var(--muted);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 22px;
  font-size: var(--fs-1);
  letter-spacing: 0.12em;
  color: var(--muted);
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }

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

.breadcrumb a { color: var(--muted); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--gold-soft); }
.breadcrumb [aria-current="page"] { color: var(--gold-soft); }

.prose {
  max-width: var(--read);
  font-size: var(--fs-4);
  line-height: 1.9;
  color: rgba(244, 241, 234, 0.86);
}

.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: var(--fs-6); margin-top: 2.2em; }
.prose h3 { font-size: var(--fs-5); margin-top: 1.8em; }
.prose a {
  color: var(--gold-soft);
  border-bottom: 1px solid rgba(201, 162, 74, 0.45);
  transition: border-color var(--dur) var(--ease);
}
.prose a:hover { border-bottom-color: var(--gold-soft); }

.num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

/* ---------- 9. 滚动进度与返回顶部 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  z-index: 300;
  background: linear-gradient(90deg, var(--jade), var(--gold), var(--coral));
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: clamp(16px, 4vw, 40px);
  bottom: 28px;
  z-index: 200;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(18, 41, 63, 0.92);
  color: var(--gold-soft);
  font-size: var(--fs-4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover { border-color: var(--gold-soft); }

/* ---------- 10. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 460ms var(--ease), transform 460ms var(--ease);
}

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

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1200px) {
  .nav-list { gap: 12px; }
  .nav-list a { font-size: var(--fs-1); }
}

@media (max-width: 1024px) {
  .header-ribbon__inner { min-height: 34px; }
  .ribbon-links { gap: 16px; }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 120;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 8px var(--pad) 26px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: var(--ink-mid);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 52px -26px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition:
      opacity var(--dur) var(--ease),
      transform var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list a {
    padding: 15px 0;
    font-size: var(--fs-4);
    letter-spacing: 0.02em;
    border-bottom: 1px solid rgba(58, 74, 90, 0.5);
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] {
    padding-left: 12px;
    border-left: 2px solid var(--gold);
    color: var(--gold);
  }

  .nav-cta {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 20px 0 0;
    border-left: 0;
  }

  .nav-cta .btn { width: 100%; }

  .footer-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-brand { grid-column: 1 / -1; }

  .grid--5-7,
  .grid--4-8,
  .grid--12 { grid-template-columns: minmax(0, 1fr); }

  .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --pad: clamp(18px, 5vw, 28px); }

  .header-ribbon { display: none; }

  .header-main__inner { min-height: 64px; padding-block: 10px; gap: 14px; }

  .brand__mark { width: 38px; height: 38px; flex-basis: 38px; font-size: 19px; }
  .brand__name { font-size: var(--fs-4); }
  .brand__sub { display: none; }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .breadcrumb { padding-block: 16px; }
}

@media (max-width: 480px) {
  .header-ribbon__inner { font-size: 11px; }
  .nav-toggle__label { display: none; }
  .to-top { width: 44px; height: 44px; bottom: 18px; }
}

/* ---------- 12. 无动画偏好 ---------- */
@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;
  }

  html.js [data-reveal] { opacity: 1; transform: none; }

  .panel:hover, .btn:hover { transform: none; }
}