/* ============================================================
   澳门王牌网 · 共享样式表  /assets/site.css
   夜港深靛 × 竞技金 × 奶油纸面
   ============================================================ */

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

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

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

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

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

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

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

a {
  color: inherit;
}

/* ---------- 2. tokens ---------- */
:root {
  --night: #0E1733;
  --indigo: #1B2A5B;
  --cream: #F5EEE1;
  --ink: #221A14;
  --gold: #D9A227;
  --gold-hi: #F2C94C;
  --mint: #3FBF9C;
  --coral: #D9502A;
  --silver: #B9C2D6;
  --paper-shadow: #E7DCC6;

  --deep-1: #0B1229;
  --deep-2: #070C1C;

  --font-display: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: ui-monospace, "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --shadow-paper: 5px 6px 0 -1px var(--paper-shadow), 5px 6px 0 0 rgba(34, 26, 20, 0.45);
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--cream);
  background-color: var(--night);
  background-image:
    radial-gradient(58% 42% at 88% -4%, rgba(27, 42, 91, 0.95), transparent 72%),
    radial-gradient(46% 34% at 2% 6%, rgba(63, 191, 156, 0.10), transparent 72%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  word-break: break-word;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
}

h1 { font-size: clamp(2.4rem, 5vw, 4.6rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 800; letter-spacing: 0; }

::selection {
  background: var(--gold);
  color: var(--night);
}

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: min(1240px, calc(100% - 2.4rem));
  margin-inline: auto;
}

.section {
  padding: clamp(2.2rem, 4.5vw, 3.6rem) 0;
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  margin-bottom: 1.4rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(185, 194, 214, 0.28);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section__desc {
  font-size: 13px;
  color: var(--silver);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.6rem);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.stack > * + * { margin-top: 1rem; }

.rule {
  height: 1px;
  border: 0;
  margin: 1.6rem 0;
  background: rgba(185, 194, 214, 0.26);
}

.on-dark { color: var(--cream); }

/* ---------- 5. 文字元件 ---------- */
.label {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

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

.u-gold {
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

/* ---------- 6. 标签 ---------- */
.tag {
  --tag-c: #7A5A10;
  --tag-b: rgba(217, 162, 39, 0.18);
  --tag-l: rgba(217, 162, 39, 0.55);
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  padding: 2px 8px;
  color: var(--tag-c);
  background: var(--tag-b);
  border: 1px solid var(--tag-l);
  white-space: nowrap;
}

.tag--mint {
  --tag-c: #1F6B55;
  --tag-b: rgba(63, 191, 156, 0.18);
  --tag-l: rgba(63, 191, 156, 0.5);
}

.tag--coral {
  --tag-c: #A63A17;
  --tag-b: rgba(217, 80, 42, 0.16);
  --tag-l: rgba(217, 80, 42, 0.5);
}

.tag--gold {
  --tag-c: #7A5A10;
  --tag-b: rgba(217, 162, 39, 0.18);
  --tag-l: rgba(217, 162, 39, 0.55);
}

.on-dark .tag--mint { --tag-c: #7FE0C4; --tag-b: rgba(63, 191, 156, 0.14); }
.on-dark .tag--coral { --tag-c: #F0906C; --tag-b: rgba(217, 80, 42, 0.18); }
.on-dark .tag--gold { --tag-c: var(--gold-hi); --tag-b: rgba(217, 162, 39, 0.14); }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.68rem 1.25rem;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-decoration: none;
  color: var(--gold);
  background: transparent;
  border: 1px solid rgba(217, 162, 39, 0.7);
  cursor: pointer;
  transition: background-color 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.btn:hover {
  background: var(--gold-hi);
  border-color: var(--gold-hi);
  color: var(--night);
}

.btn--solid {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--night);
  font-weight: 700;
}

.btn--coral {
  border-color: rgba(217, 80, 42, 0.75);
  color: #F0906C;
}

.btn--coral:hover {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--cream);
}

/* ---------- 8. 纸张 / 框景 ---------- */
.paper {
  position: relative;
  padding: 1.4rem 1.5rem;
  background: var(--cream);
  color: var(--ink);
  border: 1px solid rgba(34, 26, 20, 0.4);
  box-shadow: var(--shadow-paper);
}

.paper--tilt { transform: rotate(-0.8deg); }

.paper__cut {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 18px;
  height: 18px;
  background: linear-gradient(135deg, transparent 50%, var(--paper-shadow) 50%);
  pointer-events: none;
}

.frame {
  position: relative;
  padding: clamp(1.2rem, 3vw, 2.4rem);
  border: 1px solid rgba(185, 194, 214, 0.4);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--gold);
}

.frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

/* ---------- 9. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  background-color: var(--indigo);
  border: 1px solid rgba(185, 194, 214, 0.28);
}

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

.media--wide { aspect-ratio: 16 / 6; }
.media--169 { aspect-ratio: 16 / 9; }
.media--43 { aspect-ratio: 4 / 3; }

.media__ph {
  position: absolute;
  inset: 0;
  background-color: var(--indigo);
  background-image:
    radial-gradient(58% 80% at 18% 104%, rgba(63, 191, 156, 0.26), transparent 66%),
    radial-gradient(48% 68% at 86% -6%, rgba(217, 162, 39, 0.24), transparent 70%),
    repeating-linear-gradient(0deg, rgba(185, 194, 214, 0.12) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(90deg, rgba(185, 194, 214, 0.12) 0 1px, transparent 1px 28px);
}

.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 4px 9px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
  background: rgba(14, 23, 51, 0.86);
}

/* ---------- 10. 正文与提示 ---------- */
.prose {
  max-width: 70ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink);
}

.prose p + p { margin-top: 1.2em; }

.prose h2 {
  margin-top: 2em;
  margin-bottom: 0.6em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid rgba(34, 26, 20, 0.25);
}

.prose h3 {
  margin-top: 1.5em;
  margin-bottom: 0.4em;
}

.prose ul,
.prose ol {
  margin: 1em 0;
  padding-left: 1.3em;
}

.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

.prose a {
  color: #8A5B00;
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.prose strong { font-weight: 800; }

.prose--dark { color: var(--cream); }
.prose--dark h2 { border-bottom-color: rgba(185, 194, 214, 0.3); }
.prose--dark a { color: var(--gold-hi); }

.note {
  padding: 0.9rem 1.1rem;
  font-size: 14px;
  color: var(--ink);
  background: rgba(217, 80, 42, 0.12);
  border-left: 3px solid var(--coral);
}

.note--dark {
  color: var(--silver);
  background: rgba(217, 80, 42, 0.16);
}

/* ---------- 11. 面包屑 ---------- */
.crumbs {
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.crumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(185, 194, 214, 0.5);
}

.crumbs a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.crumbs a:hover {
  color: var(--gold-hi);
  border-bottom-color: var(--gold);
}

/* ---------- 12. 刊头 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background-image:
    radial-gradient(120% 160% at 50% -70%, rgba(63, 191, 156, 0.16), transparent 62%),
    linear-gradient(180deg, #101B3C 0%, var(--night) 100%);
  background-color: var(--night);
  border-bottom: 1px solid rgba(185, 194, 214, 0.24);
}

.masthead__scale {
  height: 7px;
  background-image: repeating-linear-gradient(90deg, rgba(185, 194, 214, 0.55) 0 1px, transparent 1px 12px);
  opacity: 0.5;
}

.masthead__inner {
  width: min(1240px, calc(100% - 2.4rem));
  margin-inline: auto;
  padding: 0.85rem 0 0.1rem;
  transition: padding-top 0.3s var(--ease);
}

.masthead__top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.masthead__stamp {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(185, 194, 214, 0.72);
  transition: opacity 0.28s var(--ease);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  text-align: center;
}

.brand__link {
  display: block;
  text-decoration: none;
  color: var(--cream);
}

.brand__mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  letter-spacing: 0.06em;
  line-height: 1.05;
  transition: font-size 0.3s var(--ease);
}

.brand__mark::after {
  content: "";
  display: block;
  width: 2.2em;
  height: 3px;
  margin: 0.3em auto 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-hi));
  transition: width 0.3s var(--ease), height 0.3s var(--ease);
}

.brand__sub {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(185, 194, 214, 0.78);
  transition: opacity 0.28s var(--ease);
}

.masthead__acts {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.6rem;
}

.update-badge {
  display: inline-block;
  padding: 4px 9px;
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--coral);
  white-space: nowrap;
}

.masthead__home {
  padding: 4px 10px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-decoration: none;
  border: 1px solid rgba(217, 162, 39, 0.55);
  white-space: nowrap;
  transition: background-color 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.masthead__home:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--night);
}

.masthead__nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.7rem;
  border-top: 1px dashed rgba(185, 194, 214, 0.22);
  transition: margin-top 0.3s var(--ease);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  width: 100%;
  padding: 0.35rem 0 0.55rem;
}

.nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
}

.nav__link {
  display: block;
  padding: 0.42rem 0.78rem;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.nav__link:hover {
  color: var(--gold-hi);
  border-bottom-color: rgba(217, 162, 39, 0.7);
}

.nav__link[aria-current="page"] {
  color: var(--cream);
  background: rgba(217, 162, 39, 0.1);
  border-bottom-color: var(--gold);
}

.nav__foot {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.35rem 0 0.35rem 1.1rem;
  border-left: 1px solid rgba(185, 194, 214, 0.25);
}

.nav__foot-link {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(185, 194, 214, 0.72);
  text-decoration: none;
  transition: color 0.22s var(--ease);
}

.nav__foot-link:hover {
  color: var(--gold-hi);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 4px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 8px 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cream);
  background: transparent;
  border: 1px solid rgba(185, 194, 214, 0.4);
  cursor: pointer;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--gold);
  color: var(--gold-hi);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}

.nav-toggle__bars i {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--gold);
  transition: transform 0.24s var(--ease), opacity 0.2s var(--ease);
}

.masthead[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.masthead[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.masthead[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.masthead__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 3;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--mint), var(--gold) 58%, var(--coral));
  pointer-events: none;
}

/* 滚动收窄 */
.masthead[data-scrolled] .masthead__inner { padding-top: 0.5rem; }
.masthead[data-scrolled] .brand__mark { font-size: clamp(1.15rem, 2.2vw, 1.5rem); }
.masthead[data-scrolled] .brand__mark::after { width: 1.5em; height: 2px; }
.masthead[data-scrolled] .brand__sub { opacity: 0; }
.masthead[data-scrolled] .masthead__stamp { opacity: 0; }
.masthead[data-scrolled] .masthead__nav { margin-top: 0.45rem; }

/* ---------- 13. 页脚 ---------- */
.site-foot {
  position: relative;
  padding: 2.8rem 0 1.4rem;
  color: var(--silver);
  background-color: var(--deep-1);
  background-image: linear-gradient(180deg, var(--deep-1) 0%, var(--deep-2) 100%);
  border-top: 1px solid rgba(185, 194, 214, 0.24);
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold) 22%, var(--mint) 55%, transparent 90%);
  opacity: 0.6;
}

.site-foot__inner {
  width: min(1240px, calc(100% - 2.4rem));
  margin-inline: auto;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr 1.15fr;
  gap: 2.4rem;
}

.foot-brand__name {
  margin-bottom: 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.foot-brand__desc {
  max-width: 36ch;
  margin-bottom: 0.9rem;
  font-size: 13px;
  line-height: 1.85;
  color: rgba(185, 194, 214, 0.82);
}

.foot-brand__icp {
  padding-left: 0.55rem;
  color: rgba(185, 194, 214, 0.62);
  border-left: 2px solid var(--coral);
}

.foot-col__title {
  margin-bottom: 0.9rem;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.foot-list {
  display: grid;
  gap: 0.5rem;
}

.foot-list--contact { gap: 0.75rem; }

.foot-link {
  font-size: 13.5px;
  color: var(--silver);
  text-decoration: none;
  transition: color 0.22s var(--ease);
}

.foot-link:hover { color: var(--gold-hi); }

.foot-contact {
  display: grid;
  gap: 0.25rem;
}

.foot-contact__k {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: rgba(185, 194, 214, 0.6);
}

.foot-contact__v {
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 5px 9px;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  text-align: left;
  color: var(--cream);
  background: transparent;
  border: 1px dashed rgba(217, 162, 39, 0.5);
  cursor: pointer;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.copy-btn:hover {
  border-style: solid;
  border-color: var(--gold-hi);
  color: var(--gold-hi);
}

.copy-btn__text { word-break: break-all; }

.copy-btn__hint {
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem 1.4rem;
  margin-top: 2.4rem;
  padding-top: 1.1rem;
  border-top: 1px dashed rgba(185, 194, 214, 0.2);
}

.foot-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.foot-copy {
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(185, 194, 214, 0.6);
}

.foot-copy [data-year] { color: var(--gold); }

/* ---------- 14. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--gold);
  background: var(--indigo);
  border: 1px solid rgba(217, 162, 39, 0.6);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s var(--ease), background-color 0.22s var(--ease);
}

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

.to-top:hover {
  color: var(--night);
  background: var(--gold-hi);
  border-color: var(--gold-hi);
}

/* ---------- 15. 显现与索引高亮 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.42s var(--ease), transform 0.42s var(--ease);
}

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

[data-spy-link][aria-current="true"] {
  color: var(--gold-hi);
  border-left-color: var(--gold);
}

/* ---------- 16. 跳转链接与焦点 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 100;
  padding: 0.6rem 1.1rem;
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--night);
  background: var(--gold);
  text-decoration: none;
  transform: translate(-50%, -130%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

:focus-visible {
  outline: 2px solid var(--gold-hi);
  outline-offset: 2px;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 960px) {
  .foot-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .foot-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .masthead__inner { padding-top: 0.7rem; }

  .masthead__top {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 0.5rem;
  }

  .masthead__stamp {
    order: 3;
    font-size: 10.5px;
  }

  .masthead__acts { justify-content: center; }

  .masthead__nav {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding-bottom: 0.6rem;
  }

  .nav-toggle {
    display: inline-flex;
    align-self: stretch;
    justify-content: center;
    margin-top: 0.6rem;
  }

  .nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 0;
  }

  .masthead[data-open] .nav {
    display: flex;
    padding-top: 0.5rem;
  }

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

  .nav__item { width: 100%; }

  .nav__link {
    padding: 0.72rem 0.35rem;
    font-size: 12.5px;
    border-bottom: 1px solid rgba(185, 194, 214, 0.16);
    border-left: 3px solid transparent;
  }

  .nav__link:hover {
    border-bottom-color: rgba(185, 194, 214, 0.16);
  }

  .nav__link[aria-current="page"] {
    background: rgba(217, 162, 39, 0.09);
    border-bottom-color: rgba(185, 194, 214, 0.16);
    border-left-color: var(--gold);
  }

  .nav__foot {
    flex-direction: row;
    gap: 1.1rem;
    margin-top: 0.6rem;
    padding: 0.7rem 0.35rem 0;
    border-left: 0;
    border-top: 1px dashed rgba(185, 194, 214, 0.22);
  }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .wrap,
  .masthead__inner,
  .site-foot__inner {
    width: calc(100% - 1.6rem);
  }

  .foot-grid { grid-template-columns: 1fr; }

  .foot-legal {
    flex-direction: column;
    align-items: flex-start;
  }

  .to-top {
    right: 0.8rem;
    bottom: 0.8rem;
  }
}

@media (min-width: 961px) {
  body { background-attachment: fixed; }
}

/* ---------- 18. 动效降级 ---------- */
@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;
  }

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

  .masthead__progress { display: none; }
}