/* ==========================================================================
   豪门娱乐会馆 · 共享样式 /assets/site.css
   技术蓝图网格 × 夜色会馆门楣：细线、编号、金线、克制的石榴红路径
   ========================================================================== */

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

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

body { margin: 0; }

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

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

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

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

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

/* 2. 设计令牌 -------------------------------------------------------------- */
:root {
  --ink: #14161C;
  --ink-soft: #1B1E26;
  --gold: #C9A227;
  --snow: #F2F0EA;
  --red: #B33A3A;
  --copper: #6E6A5E;
  --sand: #D8CFB8;
  --deep: #24303A;
  --mist: #E8D9A8;
  --white: #FFFFFF;

  --line: rgba(20, 22, 28, 0.14);
  --line-soft: rgba(20, 22, 28, 0.08);
  --line-dark: rgba(242, 240, 234, 0.14);
  --line-dark-soft: rgba(242, 240, 234, 0.08);
  --gold-line: rgba(201, 162, 39, 0.46);
  --gold-wash: rgba(201, 162, 39, 0.1);
  --red-line: rgba(179, 58, 58, 0.42);
  --on-dark: rgba(242, 240, 234, 0.78);
  --on-dark-dim: rgba(242, 240, 234, 0.58);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell: 1280px;
  --pad: clamp(20px, 5vw, 72px);
  --gap: 24px;
  --shadow: 0 1px 0 rgba(20, 22, 28, 0.04), 0 18px 40px -32px rgba(20, 22, 28, 0.65);
  --shadow-lift: 0 1px 0 rgba(20, 22, 28, 0.05), 0 26px 52px -34px rgba(20, 22, 28, 0.7);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 3. 基础排版 -------------------------------------------------------------- */
body {
  background-color: var(--snow);
  background-image:
    linear-gradient(0deg, rgba(20, 22, 28, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 22, 28, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.6rem, 6vw, 5.4rem); }
h2 { font-size: clamp(1.8rem, 3.2vw, 3rem); }
h3 { font-size: clamp(1.15rem, 1.7vw, 1.4rem); letter-spacing: -0.01em; }
h4 { font-size: 1.02rem; letter-spacing: 0; }

p { max-width: 68ch; }

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

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

/* 4. 版式容器与节奏 -------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: clamp(48px, 7vw, 96px); }

.hairline {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
  flex: 0 0 auto;
}

.grid {
  display: grid;
  gap: var(--gap);
  align-items: start;
}
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--split-alt { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
}
.prose > * + * { margin-top: 1.2em; }
.prose h2 { margin-top: 2em; font-size: clamp(1.5rem, 2.4vw, 2rem); }
.prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.4em; list-style: disc; }
.prose li + li { margin-top: 0.5em; }
.prose a {
  color: var(--ink);
  border-bottom: 1px solid var(--gold-line);
}
.prose a:hover { border-bottom-color: var(--red); }

.lattice {
  background-image:
    linear-gradient(0deg, rgba(36, 48, 58, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 48, 58, 0.09) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* 5. 页头：居中刊头 -------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  isolation: isolate;
  background: var(--ink);
  color: var(--snow);
  border-bottom: 1px solid var(--gold-line);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 150% at 50% -50%, rgba(201, 162, 39, 0.18), transparent 62%),
    linear-gradient(180deg, rgba(36, 48, 58, 0.4), transparent 70%);
  pointer-events: none;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 120;
  transform: translate(-50%, -130%);
  padding: 10px 20px;
  background: var(--gold);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 0 0 2px 2px;
  transition: transform 0.18s var(--ease);
}
.skip-link:focus-visible { transform: translate(-50%, 0); }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold), var(--red));
  pointer-events: none;
}

.masthead {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.masthead__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0 8px;
  border-bottom: 1px solid var(--line-dark-soft);
}

.masthead__utility {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
  min-height: 20px;
}

.utility-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--on-dark-dim);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.utility-link:hover {
  color: var(--mist);
  border-bottom-color: var(--gold);
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink);
  background: var(--mist);
  border: 1px solid var(--gold);
  border-radius: 2px;
  padding: 2px 8px;
  white-space: nowrap;
}

.masthead__center {
  text-align: center;
  padding: clamp(16px, 2.4vw, 26px) 0 12px;
  transition: padding 0.24s var(--ease);
}

.masthead__brandrow {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 32px);
}
.masthead__brandrow::before,
.masthead__brandrow::after {
  content: "";
  flex: 1 1 0;
  min-width: 12px;
  height: 1px;
}
.masthead__brandrow::before {
  background: linear-gradient(90deg, transparent, var(--gold-line));
}
.masthead__brandrow::after {
  background: linear-gradient(270deg, transparent, var(--gold-line));
}

.masthead__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.masthead__mark {
  position: relative;
  display: block;
  width: 26px;
  height: 26px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  flex: 0 0 auto;
}
.masthead__mark::before {
  content: "";
  position: absolute;
  inset: 4px 4px auto 4px;
  height: 1px;
  background: var(--gold);
}
.masthead__mark::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
}

.masthead__wordmark {
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--snow);
  white-space: nowrap;
  transition: font-size 0.24s var(--ease);
}

.masthead__tagline {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.36em;
  text-indent: 0.36em;
  color: var(--gold);
  max-width: none;
}

.masthead__bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 1px solid var(--line-dark-soft);
}

/* 6. 主导航与移动按钮 ------------------------------------------------------ */
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(2px, 1.4vw, 18px);
}

.site-nav__item { position: relative; }

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 13px 6px;
  font-size: 14px;
  line-height: 1;
  color: var(--on-dark);
  border-bottom: 2px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.site-nav__link:hover { color: var(--mist); }
.site-nav__link:hover .site-nav__num { color: var(--gold); }

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(201, 162, 39, 0.65);
  transition: color 0.18s var(--ease);
}

.site-nav__label { display: inline-block; }

.site-nav__link[aria-current="page"] {
  color: var(--white);
  font-weight: 700;
  border-bottom-color: var(--red);
}
.site-nav__link[aria-current="page"] .site-nav__num { color: var(--gold); }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 14px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--snow);
}
.nav-toggle__text { display: inline-block; }
.nav-toggle__bars {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--gold);
  box-shadow: 0 -6px 0 var(--gold), 0 6px 0 var(--gold);
  transition: background 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: var(--red);
  box-shadow: 0 -6px 0 var(--red), 0 6px 0 var(--red);
}

/* 刊头压缩态 */
.site-header.is-condensed .masthead__center {
  padding-block: 8px 6px;
}
.site-header.is-condensed .masthead__tagline { display: none; }
.site-header.is-condensed .masthead__wordmark { font-size: clamp(1.15rem, 1.9vw, 1.45rem); }
.site-header.is-condensed .masthead__mark { width: 22px; height: 22px; }
.site-header.is-condensed .masthead__top { padding-block: 6px; }

/* 7. 页脚 ------------------------------------------------------------------ */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--snow);
  border-top: 1px solid var(--gold-line);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(201, 162, 39, 0.16), transparent 20%),
    radial-gradient(90% 120% at 100% 0%, rgba(36, 48, 58, 0.75), transparent 60%);
}

.footer__inner {
  position: relative;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--pad) clamp(32px, 4vw, 52px);
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4vw, 60px);
}

.footer__brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer__mark {
  position: relative;
  display: block;
  width: 24px;
  height: 24px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  flex: 0 0 auto;
}
.footer__mark::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 6px;
  height: 1px;
  background: var(--gold);
  box-shadow: 0 6px 0 rgba(201, 162, 39, 0.65);
}

.footer__wordmark {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.footer__motto {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--gold);
  max-width: none;
}

.footer__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

.footer__meta {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(242, 240, 234, 0.42);
  max-width: none;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}

.footer__col-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.3;
  color: var(--snow);
  border-bottom: 1px solid var(--line-dark);
}

.footer__col-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.footer__list li + li { margin-top: 2px; }

.footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--on-dark);
  padding: 5px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer__link:hover {
  color: var(--mist);
  border-bottom-color: var(--gold);
}

.footer__facts {
  display: grid;
  gap: 12px;
}

.footer__fact {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}
.footer__fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}
.footer__fact dd {
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(242, 240, 234, 0.84);
  overflow-wrap: anywhere;
}

.footer__legal {
  position: relative;
  background: var(--deep);
  border-top: 1px solid rgba(201, 162, 39, 0.3);
}

.footer__legal-inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 16px var(--pad);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(242, 240, 234, 0.62);
}
.footer__copy { max-width: none; }
.footer__icp { color: var(--mist); max-width: none; }

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

.footer__link--legal {
  padding: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(242, 240, 234, 0.7);
  border-bottom: 1px solid rgba(242, 240, 234, 0.3);
}
.footer__link--legal:hover {
  color: var(--mist);
  border-bottom-color: var(--gold);
}

/* 8. 通用按钮 -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: 2px;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn:hover { transform: translateY(-1px); }

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}
.btn--gold:hover {
  background: var(--mist);
  border-color: var(--gold);
}

.btn--ghost {
  border-color: rgba(242, 240, 234, 0.34);
  color: var(--snow);
}
.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--mist);
  background: rgba(201, 162, 39, 0.08);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 13px;
}

/* 9. 面包屑 ---------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--copper);
}
.breadcrumb__link {
  color: var(--copper);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.breadcrumb__link:hover {
  color: var(--red);
  border-bottom-color: var(--red-line);
}
.breadcrumb__sep {
  color: rgba(110, 106, 94, 0.6);
  font-size: 11px;
}

/* 10. 展签卡 --------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: clamp(20px, 2.4vw, 28px);
  box-shadow: var(--shadow);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
}
.card:hover {
  border-color: var(--gold-line);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}

.card__index {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.card__title {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.card__body {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--copper);
  max-width: 40ch;
}

/* 11. 竖向门牌索引 --------------------------------------------------------- */
.plate {
  background: linear-gradient(180deg, var(--sand), rgba(216, 207, 184, 0.55));
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 18px 0 8px;
}

.plate__title {
  padding: 0 18px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--copper);
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.plate__list { display: grid; }

.plate__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 18px;
  font-size: 14px;
  color: var(--ink);
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.plate__link:hover {
  background: rgba(201, 162, 39, 0.14);
  border-left-color: var(--gold);
}
.plate__link.is-active {
  background: rgba(201, 162, 39, 0.2);
  border-left-color: var(--red);
  font-weight: 700;
}

.plate__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper);
  flex: 0 0 auto;
}
.plate__link.is-active .plate__num { color: var(--red); }

/* 12. 图片画框 ------------------------------------------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--deep);
  aspect-ratio: 16 / 10;
}
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(0deg, rgba(242, 240, 234, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 240, 234, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
  mix-blend-mode: screen;
  opacity: 0.5;
}

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame__cap {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 2px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--copper);
}

/* 13. 标签 ----------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--copper);
  background: rgba(232, 217, 168, 0.42);
  border: 1px solid var(--gold-line);
  border-radius: 2px;
}

.tag--red {
  color: var(--red);
  background: rgba(179, 58, 58, 0.08);
  border-color: var(--red-line);
}

/* 14. 显现与返回顶部 ------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
  background: var(--ink);
  border: 1px solid var(--gold-line);
  border-radius: 2px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}
.to-top.is-on {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.to-top:hover {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}
.to-top__label { display: inline-block; }
.to-top__arrow {
  width: 8px;
  height: 8px;
  border-left: 1px solid currentColor;
  border-top: 1px solid currentColor;
  transform: rotate(45deg);
}

/* 15. 响应式 --------------------------------------------------------------- */
@media (max-width: 1080px) {
  .footer__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .footer__brand { grid-column: 1 / -1; }
  .footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .masthead__bar {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
  }

  .nav-toggle { display: flex; order: 1; }

  .site-nav {
    order: 2;
    display: none;
    max-height: min(70vh, 520px);
    overflow-y: auto;
    border-top: 1px solid var(--line-dark-soft);
  }
  .site-nav[data-open="true"] { display: block; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 4px 0 14px;
  }

  .site-nav__link {
    justify-content: flex-start;
    padding: 13px 2px;
    font-size: 15px;
    border-bottom: 1px solid var(--line-dark-soft);
    border-left: 2px solid transparent;
  }
  .site-nav__link[aria-current="page"] {
    border-bottom-color: var(--line-dark-soft);
    border-left-color: var(--red);
    background: rgba(201, 162, 39, 0.07);
    padding-left: 12px;
  }

  .grid--split,
  .grid--split-alt {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__legal-links { margin-left: 0; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }

  .masthead__utility { display: none; }
  .masthead__top { justify-content: flex-end; }
  .masthead__tagline { letter-spacing: 0.24em; text-indent: 0.24em; }
  .masthead__wordmark { letter-spacing: 0.02em; }

  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__contact { grid-column: auto; }
  .footer__legal-inner { flex-direction: column; align-items: flex-start; gap: 6px; }
}

@media (max-width: 520px) {
  .footer__nav { grid-template-columns: minmax(0, 1fr); }
  .masthead__brandrow::before,
  .masthead__brandrow::after { min-width: 8px; }
  .footer__fact { grid-template-columns: 46px minmax(0, 1fr); }
}

/* 16. 减弱动效 ------------------------------------------------------------- */
@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;
  }

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

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