/* ============================================================
   杏运娱乐 · 全站共享样式
   文件位置：/assets/site.css
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --color-navy: #12284C;
  --color-navy-soft: #1E3A6E;
  --color-gold: #C9A54E;
  --color-gold-soft: #E7D9A8;
  --color-orange: #FF6B35;
  --color-orange-dark: #E5542A;
  --color-paper: #F3EFE6;
  --color-ink: #1A1A1A;
  --color-slate: #4A5A6A;
  --color-white: #FFFFFF;

  --font-head: "Noto Sans SC", -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-body: "Noto Sans SC", -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, "Liberation Mono", monospace;

  --radius-xl: 40px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 10px;
  --btn-radius: 999px;

  --content-max: 1200px;
  --space-section: clamp(48px, 8vw, 96px);
  --space-block: clamp(32px, 5vw, 64px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-nav: 0 10px 32px rgba(18, 40, 76, 0.35);
  --shadow-card: 0 12px 32px rgba(18, 40, 76, 0.08);
}

/* ---------- Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 130px;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  flex: 1 0 auto;
}

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

ul, ol {
  list-style: none;
}

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

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

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

/* ---------- 基础中文排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.2;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
  margin-bottom: 1em;
}

/* ---------- 可访问性 ---------- */
:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(201, 165, 78, 0.25);
  border-radius: 6px;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 9999;
  padding: 10px 22px;
  border-radius: var(--btn-radius);
  background: var(--color-orange);
  color: var(--color-navy);
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(18, 40, 76, 0.35);
  transition: top 0.2s var(--ease);
}

.skip-link:focus-visible {
  top: 12px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   头部 · 深蓝渐变 + 悬浮胶囊导航
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(
    180deg,
    var(--color-navy) 0%,
    var(--color-navy) calc(100% - 18px),
    rgba(18, 40, 76, 0) calc(100% - 6px),
    rgba(18, 40, 76, 0) 100%
  );
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--color-gold), var(--color-orange));
  pointer-events: none;
  z-index: 5;
  transition: transform 80ms linear;
}

.site-header__notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 6px 16px;
  color: var(--color-gold-soft);
  border-bottom: 1px solid rgba(201, 165, 78, 0.22);
}

.notice-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  border-radius: var(--btn-radius);
  background: var(--color-orange);
  color: var(--color-navy);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  flex-shrink: 0;
}

.notice-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: currentColor;
  opacity: 0.7;
}

.notice-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  text-align: center;
}

.site-header__capsule {
  padding: 10px 16px 14px;
}

/* 悬浮胶囊导航 */
.nav-capsule {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 8px 12px;
  border-radius: var(--btn-radius);
  background: var(--color-navy-soft);
  border: 1px solid rgba(201, 165, 78, 0.55);
  box-shadow: var(--shadow-nav);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav-capsule[data-open] {
  border-color: var(--color-gold);
  box-shadow: 0 14px 40px rgba(18, 40, 76, 0.45);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-right: auto;
}

.brand__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-gold), #A9842E);
  color: var(--color-navy);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 22px;
  line-height: 1;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, 0.3), inset 0 -2px 0 rgba(0, 0, 0, 0.1);
}

.brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.06em;
  color: var(--color-white);
  line-height: 1.2;
}

.brand__name-gold {
  color: var(--color-gold);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--btn-radius);
  background: rgba(201, 165, 78, 0.12);
  border: 1px solid rgba(201, 165, 78, 0.4);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--color-gold);
  background: rgba(201, 165, 78, 0.2);
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--color-gold-soft);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-capsule[data-open] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-capsule[data-open] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-capsule[data-open] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 导航链接 */
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  flex-wrap: nowrap;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--btn-radius);
  font-size: 15px;
  font-weight: 500;
  color: rgba(231, 217, 168, 0.86);
  white-space: nowrap;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.nav-link:hover {
  background: rgba(201, 165, 78, 0.14);
  color: var(--color-white);
}

.nav-link[aria-current="page"] {
  background: var(--color-gold);
  color: var(--color-navy);
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(201, 165, 78, 0.35);
}

/* 导航内行动按钮 */
.nav-cta {
  margin-left: auto;
  flex-shrink: 0;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--btn-radius);
  background: var(--color-orange);
  color: var(--color-navy);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  transition: background-color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.cta-button:hover {
  background: var(--color-orange-dark);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
  transform: translateY(-1px);
}

.cta-button--small {
  padding: 9px 18px;
  font-size: 14px;
}

.cta__arrow {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  transition: transform 0.3s var(--ease);
}

.cta-button:hover .cta__arrow {
  transform: translateX(3px);
}

/* ---------- 头部响应式 ---------- */
@media (max-width: 1080px) {
  .nav-cta .cta__arrow {
    display: none;
  }
  .nav-link {
    padding: 8px 10px;
    font-size: 14px;
  }
  .brand__name {
    font-size: 18px;
  }
}

@media (max-width: 900px) {
  .scroll-padding-top {
    scroll-padding-top: 120px;
  }

  .site-header__notice {
    gap: 8px;
    padding: 5px 12px;
  }

  .site-header__capsule {
    padding: 8px 10px 10px;
  }

  .nav-capsule {
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px;
    border-radius: 24px;
  }

  .brand {
    margin-right: 0;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nav-cta {
    display: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    gap: 2px;
    padding: 0;
    transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease), padding 0.25s var(--ease);
  }

  .nav-capsule[data-open] .nav-list {
    max-height: 480px;
    opacity: 1;
    padding: 10px 0 4px;
  }

  .nav-item + .nav-item {
    border-top: 1px solid rgba(201, 165, 78, 0.12);
  }

  .nav-link {
    width: 100%;
    padding: 10px 14px;
    border-radius: 14px;
    white-space: normal;
  }

  .notice-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 70vw;
  }
}

@media (max-width: 560px) {
  .notice-badge {
    font-size: 10px;
    padding: 2px 8px;
  }
  .notice-text {
    font-size: 11px;
  }
  .brand__name {
    font-size: 16px;
  }
  .brand__icon {
    width: 38px;
    height: 38px;
    font-size: 19px;
  }
}

/* ============================================================
   页脚 · 展览册封底
   ============================================================ */
.site-footer {
  margin-top: auto;
  background: var(--color-navy);
  color: var(--color-gold-soft);
  border-top: 4px solid var(--color-gold);
  position: relative;
}

.site-footer::before {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-orange) 50%, transparent 100%);
}

.footer-top {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 20px 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 40px;
}

.footer-brand {
  display: grid;
  gap: 18px;
  align-content: start;
}

.footer-brand__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
}

.footer-brand__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-gold), #A9842E);
  color: var(--color-navy);
  font-weight: 900;
  font-size: 22px;
  line-height: 1;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, 0.3), inset 0 -2px 0 rgba(0, 0, 0, 0.1);
}

.footer-brand__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--color-white);
  line-height: 1.2;
}

.footer-trust {
  margin: 0;
  max-width: 380px;
  font-size: 13px;
  line-height: 1.9;
  color: rgba(231, 217, 168, 0.75);
}

.footer-col {
  display: grid;
  gap: 14px;
  align-content: start;
}

.footer-col--contact {
  background: rgba(30, 58, 110, 0.4);
  border: 1px solid rgba(201, 165, 78, 0.2);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(201, 165, 78, 0.25);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--color-white);
}

.footer-heading__no {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12px;
  color: var(--color-gold);
}

.footer-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(231, 217, 168, 0.8);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.footer-links a::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--color-gold);
  opacity: 0.5;
  flex-shrink: 0;
  transition: opacity 0.25s var(--ease), background-color 0.25s var(--ease);
}

.footer-links a:hover {
  color: var(--color-white);
  padding-left: 4px;
}

.footer-links a:hover::before {
  opacity: 1;
  background: var(--color-orange);
}

.footer-contact {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 10px;
  padding: 8px 12px;
  background: rgba(30, 58, 110, 0.6);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: rgba(231, 217, 168, 0.85);
}

.footer-contact__label {
  color: rgba(231, 217, 168, 0.6);
  flex-shrink: 0;
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 12px;
  word-break: break-all;
}

.footer-contact__copy {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-gold);
  padding: 3px 10px;
  border: 1px solid var(--color-gold);
  border-radius: var(--btn-radius);
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.footer-contact__copy:hover {
  background: var(--color-gold);
  color: var(--color-navy);
}

.footer-contact__copy[data-copied] {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: var(--color-navy);
}

.footer-bottom {
  border-top: 1px solid rgba(201, 165, 78, 0.2);
  background: rgba(18, 40, 76, 0.6);
  padding: 18px 20px;
}

.footer-bottom__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  gap: 4px;
  text-align: center;
}

.footer-copy {
  margin: 0;
  font-size: 13px;
  color: rgba(231, 217, 168, 0.7);
}

.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(231, 217, 168, 0.5);
}

.footer-contact-line {
  margin: 0;
  font-size: 12px;
  color: rgba(231, 217, 168, 0.55);
}

/* ---------- 页脚响应式 ---------- */
@media (max-width: 960px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 40px;
  }
  .footer-contact__item {
    flex-wrap: wrap;
  }
}

/* ============================================================
   布局容器
   ============================================================ */
.content-shell {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 20px;
}

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

.section--tight {
  padding-block: calc(var(--space-section) * 0.5);
}

.section--dark {
  background: radial-gradient(ellipse 80% 50% at 20% 0%, rgba(201, 165, 78, 0.12), transparent 70%), var(--color-navy);
  color: var(--color-gold-soft);
}

.section--dark .section-title,
.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--color-white);
}

.section--dark .section-desc {
  color: rgba(231, 217, 168, 0.8);
}

.section--paper {
  background: var(--color-paper);
}

.section-head {
  max-width: 720px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-orange);
  text-transform: uppercase;
}

.section-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.section-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.section-desc {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-slate);
}

/* ============================================================
   内页封面头与面包屑
   ============================================================ */
.page-header {
  padding-block: clamp(32px, 6vw, 72px) clamp(20px, 3vw, 40px);
  background: radial-gradient(ellipse 70% 60% at 85% 0%, rgba(201, 165, 78, 0.16), transparent 70%), var(--color-navy);
  color: var(--color-gold-soft);
}

.page-header__shell {
  display: grid;
  gap: 12px;
}

.page-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.page-header__desc {
  max-width: 640px;
  margin: 0;
  color: rgba(231, 217, 168, 0.85);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-gold-soft);
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(231, 217, 168, 0.4);
}

.breadcrumb__link {
  color: var(--color-gold);
  transition: color 0.25s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--color-orange);
}

.breadcrumb__current {
  color: var(--color-white);
}

/* ============================================================
   通用按钮与链接
   ============================================================ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--btn-radius);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.button--primary {
  background: var(--color-orange);
  color: var(--color-navy);
}

.button--primary:hover {
  background: var(--color-orange-dark);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
  transform: translateY(-2px);
}

.button--ghost {
  background: transparent;
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
}

.button--ghost:hover {
  background: rgba(201, 165, 78, 0.12);
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.link-expand {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-gold);
  font-weight: 600;
}

.link-expand::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.3s var(--ease);
}

.link-expand:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* ============================================================
   网格系统
   ============================================================ */
.grid {
  display: grid;
  gap: var(--space-block);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.layout-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

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

@media (max-width: 960px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .col-span-4,
  .col-span-5,
  .col-span-6 { grid-column: span 6; }
  .col-span-7,
  .col-span-8 { grid-column: span 12; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); gap: var(--space-block); }
  .layout-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .col-span-4,
  .col-span-5,
  .col-span-6,
  .col-span-7,
  .col-span-8,
  .col-span-12 { grid-column: span 1; }
}

/* ============================================================
   基础内容组件
   ============================================================ */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-gold-soft);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.card:hover {
  border-color: var(--color-orange);
  box-shadow: var(--shadow-card);
}

.card__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  margin-bottom: 8px;
}

.card__text {
  margin: 0;
  color: var(--color-slate);
  font-size: 14px;
  line-height: 1.7;
}

/* 展品说明牌式卡片 */
.exhibit-card {
  background: var(--color-white);
  border: 1px solid var(--color-gold-soft);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.exhibit-card:hover {
  border-color: var(--color-orange);
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.exhibit-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: var(--btn-radius);
  background: var(--color-paper);
  color: var(--color-slate);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.exhibit-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  margin: 14px 0 0;
  color: var(--color-ink);
}

.exhibit-desc {
  margin: 8px 0 0;
  color: var(--color-slate);
  font-size: 14px;
  line-height: 1.7;
}

/* 高密度索引目录 */
.index-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--color-gold-soft);
}

.index-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 18px 8px;
  border-bottom: 1px solid var(--color-gold-soft);
  transition: background-color 0.25s var(--ease);
}

.index-item:hover {
  background: rgba(201, 165, 78, 0.08);
}

.index-number {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 28px;
  line-height: 1;
  color: var(--color-gold);
  transition: transform 0.3s var(--ease);
}

.index-item:hover .index-number {
  transform: scale(1.06);
}

.index-title {
  font-weight: 600;
  color: var(--color-ink);
}

.index-meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-slate);
}

@media (max-width: 640px) {
  .index-item {
    grid-template-columns: 56px 1fr;
    gap: 12px;
  }
  .index-meta {
    grid-column: 2;
  }
}

/* 数字统计 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.stat-item {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border-left: 4px solid var(--color-gold);
}

.stat-number {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1;
  color: var(--color-navy);
}

.stat-label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-slate);
}

@media (max-width: 820px) {
  .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: minmax(0, 1fr); }
}

/* 折叠问答 */
.faq-panel {
  border: 1px solid var(--color-gold-soft);
  border-radius: var(--radius-md);
  background: var(--color-white);
  overflow: hidden;
  margin-bottom: 14px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.faq-panel[data-open] {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-card);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 22px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
  color: var(--color-ink);
}

.faq-question::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--color-gold);
  transition: transform 0.25s var(--ease);
}

.faq-panel[data-open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 22px;
  margin: 0;
  line-height: 1.8;
  color: var(--color-slate);
  transition: max-height 0.35s var(--ease), padding 0.35s var(--ease);
}

.faq-panel[data-open] .faq-answer {
  max-height: 420px;
  padding: 0 22px 20px;
}

/* 展览标签 */
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--btn-radius);
  border: 1px solid var(--color-gold-soft);
  background: var(--color-white);
  color: var(--color-slate);
  font-size: 13px;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.tag-pill:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

/* 图片容器 — 响应式基础规则 */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--color-navy-soft) 0%, var(--color-navy) 100%);
  border: 1px solid var(--color-gold-soft);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 3 / 4; }

.media-frame::before {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -12%;
  width: 55%;
  height: 55%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(201, 165, 78, 0.5), rgba(201, 165, 78, 0) 70%);
  pointer-events: none;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image:
    linear-gradient(rgba(231, 217, 168, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(231, 217, 168, 0.12) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.5;
  pointer-events: none;
}

.media-frame__inner {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  padding: 20px;
}

/* ============================================================
   全局响应式微调
   ============================================================ */
@media (max-width: 640px) {
  body {
    font-size: 15px;
  }
  .content-shell {
    padding-inline: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle__bar,
  .cta__arrow,
  .faq-question::after,
  .index-number,
  .exhibit-card {
    transition: none;
  }
}