/* ==========================================================================
   超悦机场 (chaoyuejichang.mom) — STYLE 64: MUSEUM ARCHIVE (博物馆档案与策展视觉规范)
   调色盘：
   - Gallery White (画廊白): #F5F4F0
   - Archive Black (档案黑): #202020
   - Warm Gray (暖灰分隔):   #D8D5CF
   - Archive Red (馆藏朱红): #A43B32
   - Museum Blue (博物蓝):   #405A72
   - Label Beige (签条米色): #E8E0D2
   ========================================================================== */

:root {
  --font-system: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --gallery-white: #F5F4F0;
  --archive-black: #202020;
  --warm-gray: #D8D5CF;
  --archive-red: #A43B32;
  --museum-blue: #405A72;
  --label-beige: #E8E0D2;
  --surface-card: #FAF9F6;
  --text-primary: #202020;
  --text-secondary: #42413E;
  --text-muted: #686662;
  --max-width: 1180px;
  --header-height: 72px;
}

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

html {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--gallery-white);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--gallery-white);
}

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

a {
  color: var(--archive-red);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

a:hover {
  color: var(--archive-black);
}

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

ul, ol {
  list-style: none;
}

/* 策展容器与网格 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--warm-gray);
  position: relative;
}

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

/* 展厅章节标题栏 */
.section-header {
  max-width: 780px;
  margin-bottom: 3.5rem;
  border-left: 3px solid var(--archive-red);
  padding-left: 1.5rem;
}

.exhibition-index {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--archive-red);
  background-color: var(--label-beige);
  padding: 0.2rem 0.65rem;
  margin-bottom: 0.75rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--warm-gray);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--archive-black);
  line-height: 1.25;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 博物馆直角矩形按钮规范 (STYLE 64 CTA) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 0;
  text-align: center;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  position: relative;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--archive-black);
  color: var(--gallery-white) !important;
  border: 1px solid var(--archive-black);
}

.btn-primary::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background-color: var(--archive-red);
  transition: width 0.25s ease;
}

.btn-primary:hover {
  background-color: var(--archive-red);
  border-color: var(--archive-red);
  color: #ffffff !important;
}

.btn-primary:hover::after {
  width: 100%;
}

.btn-secondary {
  background-color: transparent;
  color: var(--archive-black) !important;
  border: 1px solid var(--archive-black);
}

.btn-secondary:hover {
  background-color: var(--label-beige);
  border-color: var(--archive-red);
  color: var(--archive-red) !important;
}

.btn-block {
  width: 100%;
}

/* 顶部策展导航栏 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(245, 244, 240, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--archive-black);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--archive-black);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 0;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--archive-red);
  transition: width 0.2s ease;
}

.nav-link:hover {
  color: var(--archive-black);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
}

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  padding: 8px;
  color: var(--archive-black);
  border: 1px solid var(--warm-gray);
}

.mobile-menu-btn:focus-visible {
  outline: 2px solid var(--archive-red);
}

/* 移动端抽屉菜单 */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gallery-white);
  border-top: 1px solid var(--archive-black);
  padding: 1.75rem;
  z-index: 99;
  flex-direction: column;
  gap: 1.25rem;
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav-link {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--archive-black);
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--warm-gray);
}

/* 首屏展台 Hero (Exhibition Plinth Display) */
.hero-section {
  padding-top: 4.5rem;
  padding-bottom: 5rem;
  border-bottom: 1px solid var(--archive-black);
}

.hero-exhibition-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-catalog-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  background-color: var(--label-beige);
  border: 1px solid var(--warm-gray);
  padding: 0.4rem 0.875rem;
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--archive-black);
}

.catalog-red-dot {
  width: 8px;
  height: 8px;
  background-color: var(--archive-red);
  display: inline-block;
}

.hero-title {
  font-size: 2.625rem;
  font-weight: 800;
  color: var(--archive-black);
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1.5rem;
  border-top: 1px solid var(--warm-gray);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.trust-item svg {
  color: var(--archive-red);
}

/* 展品玻璃展柜视觉 (Plinth & Glass Display) */
.hero-plinth-box {
  background-color: var(--surface-card);
  border: 1px solid var(--archive-black);
  padding: 2.25rem;
  position: relative;
}

.plinth-frame {
  background-color: var(--gallery-white);
  border: 1px solid var(--warm-gray);
  padding: 2rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.hero-plinth-box:hover .plinth-frame {
  transform: scale(1.02);
}

.museum-placard {
  background-color: var(--label-beige);
  border: 1px solid var(--warm-gray);
  padding: 1rem 1.25rem;
  font-size: 0.8125rem;
}

.placard-row {
  display: flex;
  justify-content: space-between;
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--warm-gray);
}

.placard-row:last-child {
  border-bottom: none;
}

.placard-key {
  color: var(--text-muted);
  font-weight: 600;
}

.placard-val {
  color: var(--archive-black);
  font-weight: 700;
}

/* 馆藏条目特性卡 Features (Catalog Entries) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.feature-card {
  background-color: var(--surface-card);
  border: 1px solid var(--archive-black);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  transition: background-color 0.25s ease;
  position: relative;
}

.feature-card:hover {
  background-color: var(--label-beige);
}

.catalog-entry-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--warm-gray);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--museum-blue);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border: 1px solid var(--archive-black);
  background-color: var(--gallery-white);
  color: var(--archive-red);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: transform 0.25s ease;
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.03);
}

.feature-card-title {
  font-size: 1.3125rem;
  font-weight: 700;
  color: var(--archive-black);
  margin-bottom: 0.625rem;
}

.feature-card-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 流媒体档案墙 Streaming Support */
.streaming-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background-color: var(--archive-black);
  border: 1px solid var(--archive-black);
  margin-bottom: 2rem;
}

.streaming-item {
  background-color: var(--surface-card);
  padding: 1.75rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  transition: background-color 0.2s ease;
}

.streaming-item:hover {
  background-color: var(--label-beige);
}

.streaming-icon {
  width: 32px;
  height: 32px;
  color: var(--museum-blue);
}

.streaming-name {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--archive-black);
}

.streaming-note {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  background-color: var(--label-beige);
  padding: 0.875rem 1.25rem;
  border: 1px solid var(--warm-gray);
}

/* 使用场景实录卡 Use Cases */
.scenes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.scene-card {
  background-color: var(--gallery-white);
  border: 1px solid var(--warm-gray);
  border-top: 3px solid var(--museum-blue);
  padding: 2rem;
}

.scene-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--warm-gray);
}

.scene-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--archive-black);
}

.scene-device-tag {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--archive-black);
  background-color: var(--label-beige);
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--warm-gray);
}

.scene-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 馆藏等级定价 Pricing (OPEN / CURATED / PRIVATE COLLECTION) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.price-card {
  background-color: var(--surface-card);
  border: 1px solid var(--archive-black);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.price-card-popular {
  border-width: 2px;
  border-color: var(--archive-red);
  background-color: #ffffff;
}

.price-badge {
  position: absolute;
  top: 0;
  right: 1.5rem;
  background-color: var(--archive-red);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.875rem;
  letter-spacing: 0.06em;
}

.price-target {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--museum-blue);
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}

.price-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--archive-black);
  margin-bottom: 0.875rem;
}

.price-val {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--archive-black);
}

.price-num {
  font-size: 2.625rem;
  font-weight: 800;
  color: var(--archive-black);
  line-height: 1;
}

.price-period {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.price-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
  background-color: var(--label-beige);
  padding: 0.5rem 0.75rem;
  margin-bottom: 1.5rem;
  border-left: 2px solid var(--archive-black);
}

.price-features {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin-bottom: 2.25rem;
  flex-grow: 1;
}

.price-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.price-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--archive-red);
  flex-shrink: 0;
  margin-top: 2px;
}

/* AI 馆藏陈列模块 */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.ai-card {
  background-color: var(--gallery-white);
  border: 1px solid var(--warm-gray);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: border-color 0.2s ease;
}

.ai-card:hover {
  border-color: var(--archive-black);
}

.ai-icon-box {
  width: 42px;
  height: 42px;
  background-color: var(--label-beige);
  border: 1px solid var(--warm-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--archive-black);
}

.ai-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--archive-black);
  margin-bottom: 0.25rem;
}

.ai-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.ai-note {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* 档案检索问答 FAQ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--archive-black);
}

.faq-item {
  background-color: transparent;
  border-bottom: 1px solid var(--archive-black);
}

.faq-summary {
  padding: 1.375rem 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--archive-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--archive-red);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 0.5rem 1.5rem 0.5rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* 终章馆藏开放 Final CTA */
.cta-banner {
  background-color: var(--label-beige);
  border: 2px solid var(--archive-black);
  padding: 4rem 2.5rem;
  text-align: center;
  position: relative;
}

.cta-title {
  font-size: 2.125rem;
  font-weight: 800;
  color: var(--archive-black);
  margin-bottom: 0.875rem;
  line-height: 1.25;
}

.cta-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.25rem auto;
  line-height: 1.65;
}

/* 博物馆页脚 Footer */
.site-footer {
  background-color: var(--archive-black);
  color: var(--gallery-white);
  padding-top: 4rem;
  padding-bottom: 4rem;
  margin-top: auto;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--gallery-white);
  font-weight: 700;
  font-size: 1.125rem;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--warm-gray);
  font-size: 0.875rem;
}

.footer-nav a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 1.75rem;
  border-top: 1px solid #383838;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: #A09E99;
}

.footer-disclaimer {
  max-width: 620px;
  line-height: 1.55;
}

/* 移动端吸底馆藏入口 */
.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background-color: var(--gallery-white);
  border-top: 2px solid var(--archive-black);
  padding: 0.75rem 1.25rem;
  display: none;
  align-items: center;
  justify-content: space-between;
  transform: translateY(100%);
  transition: transform 0.25s ease-in-out;
}

.mobile-sticky-cta.is-visible {
  transform: translateY(0);
}

.sticky-info {
  display: flex;
  flex-direction: column;
}

.sticky-title {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--archive-black);
}

.sticky-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mobile-sticky-cta .btn {
  min-height: 40px;
  padding: 0 1.25rem;
  font-size: 0.875rem;
}

/* 文献馆索引页 Guides */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.guide-card {
  background-color: var(--surface-card);
  border: 1px solid var(--archive-black);
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease;
}

.guide-card:hover {
  background-color: var(--label-beige);
}

.guide-card-thumb {
  background-color: var(--gallery-white);
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--archive-red);
  border-bottom: 1px solid var(--warm-gray);
}

.guide-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.guide-card-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--archive-black);
  background-color: var(--label-beige);
  border: 1px solid var(--warm-gray);
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.875rem;
}

.guide-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--archive-black);
  line-height: 1.45;
  margin-bottom: 0.75rem;
}

.guide-card-title a {
  color: var(--archive-black);
}

.guide-card-title a:hover {
  color: var(--archive-red);
}

.guide-card-summary {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.guide-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
  border-top: 1px solid var(--warm-gray);
  padding-top: 1rem;
}

/* 文章详情页与文献页 */
.article-page, .doc-page {
  padding-top: 3rem;
  padding-bottom: 5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--warm-gray);
}

.article-body, .doc-container {
  max-width: 840px;
  margin: 0 auto;
  background-color: var(--surface-card);
  border: 1px solid var(--archive-black);
  padding: 3rem 2.5rem;
}

.article-header, .doc-header {
  margin-bottom: 2.25rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--archive-black);
}

.article-title, .doc-title {
  font-size: 2.125rem;
  font-weight: 800;
  color: var(--archive-black);
  line-height: 1.3;
  margin-bottom: 1rem;
}

.article-meta, .doc-updated {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--archive-black);
  background-color: var(--label-beige);
  border-left: 4px solid var(--archive-red);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.25rem;
}

.article-body h2, .doc-body h2 {
  font-size: 1.4375rem;
  font-weight: 700;
  color: var(--archive-black);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--warm-gray);
}

.article-body p, .doc-body p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.article-body ul, .doc-body ul {
  list-style: square;
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.article-body li, .doc-body li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.article-faq {
  margin-top: 3rem;
  background-color: var(--gallery-white);
  border: 1px solid var(--warm-gray);
  padding: 2rem;
}

.article-faq-title {
  font-size: 1.3125rem;
  font-weight: 700;
  color: var(--archive-black);
  margin-bottom: 1.25rem;
}

.article-faq-item {
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--warm-gray);
}

.article-faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.article-faq-q {
  font-weight: 700;
  color: var(--archive-black);
  margin-bottom: 0.375rem;
}

.article-faq-a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.article-cta {
  margin-top: 3rem;
  background-color: var(--label-beige);
  border: 1px solid var(--archive-black);
  padding: 2.25rem;
  text-align: center;
}

.article-cta-title {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--archive-black);
  margin-bottom: 0.625rem;
}

.article-cta-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.article-related {
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--warm-gray);
}

.related-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--archive-black);
  margin-bottom: 1rem;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.related-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  color: var(--archive-red);
  font-weight: 600;
}

/* 响应式适配 */
@media (max-width: 1024px) {
  .hero-exhibition-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .features-grid, .scenes-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
  }
  .streaming-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .ai-grid, .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
  .hero-title {
    font-size: 1.875rem;
  }
  .nav-desktop, .nav-cta {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .mobile-sticky-cta {
    display: flex;
  }
  body {
    padding-bottom: 68px;
  }
  .streaming-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ai-grid, .guides-grid {
    grid-template-columns: 1fr;
  }
  .article-body, .doc-container {
    padding: 2rem 1.25rem;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
}

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