/* ==========================================================================
   一分机场 (1fenjichang.shop) — Layer 1.5 Neo-Brutalism Conversion UI 样式表 (BEM)
   色彩体系：#F1F0E9 / #171717 / #D7F36A / #FF5A36 / #FFFFFF
   硬边粗框 | 实体位移阴影 | 物理按压反馈 | 移动优先无溢出 | WCAG 高对比度
   ========================================================================== */

:root {
  --color-bg: #F1F0E9;
  --color-surface: #FFFFFF;
  --color-ink: #171717;
  --color-ink-muted: #2E2E2E;
  --color-secondary: #D7F36A;
  --color-accent: #FF5A36;
  --color-border: #171717;
  --border-thick: 2px solid #171717;
  --border-heavy: 3px solid #171717;
  --shadow-sm: 3px 3px 0 #171717;
  --shadow-md: 5px 5px 0 #171717;
  --shadow-lg: 7px 7px 0 #171717;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --container-max: 1160px;
  --reading-max: 780px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@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;
  }
}

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

main {
  flex: 1;
}

a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  font-weight: 700;
}

a:hover {
  background-color: var(--color-secondary);
  color: var(--color-ink);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

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

ul,
ol {
  list-style-position: inside;
}

/* 跳过导航无障碍链接 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 1000;
  padding: 12px 20px;
  background-color: var(--color-secondary);
  color: var(--color-ink);
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  font-weight: 800;
  text-decoration: none;
}

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

/* 容器与通用区块（预留阴影安全内边距，防止移动端溢出） */
.layout-shell {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.section-block {
  padding: 64px 0;
  border-bottom: var(--border-heavy);
  background-color: var(--color-bg);
}

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

.section-block__header {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-block__title {
  font-size: clamp(1.65rem, 3vw, 2.4rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: 14px;
}

.section-block__desc {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  line-height: 1.65;
}

/* ==========================================================================
   新粗野主义按钮体系（硬偏移阴影 + 点击物理下压 + 悬停色彩反转）
   ========================================================================== */
.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 28px;
  font-size: 1.02rem;
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-decoration: none !important;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background-color 0.1s ease, color 0.1s ease;
}

.action-btn--primary {
  background-color: var(--color-accent);
  color: var(--color-ink) !important;
}

.action-btn--primary:hover {
  background-color: var(--color-ink);
  color: var(--color-secondary) !important;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
}

.action-btn--primary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 #171717;
}

.action-btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-ink) !important;
}

.action-btn--secondary:hover {
  background-color: var(--color-secondary);
  color: var(--color-ink) !important;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
}

.action-btn--secondary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 #171717;
}

.action-btn--block {
  width: 100%;
}

/* ==========================================================================
   顶部导航栏 (Header)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: var(--border-heavy);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: 16px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 6px 12px;
  background-color: var(--color-secondary);
  border: var(--border-thick);
  box-shadow: 2px 2px 0 #171717;
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--color-ink);
  text-decoration: none !important;
}

.site-header__brand:hover {
  background-color: var(--color-accent);
}

.site-header__brand-mark {
  display: inline-block;
  width: 12px;
  height: 12px;
  background-color: var(--color-ink);
}

.site-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 44px;
  padding: 8px 14px;
  background-color: var(--color-surface);
  border: var(--border-thick);
  box-shadow: 2px 2px 0 #171717;
  color: var(--color-ink);
  font-size: 0.95rem;
  font-weight: 800;
  cursor: pointer;
}

.site-header__toggle:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 #171717;
}

.site-header__nav {
  display: none;
  position: absolute;
  top: 70px;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-bottom: var(--border-heavy);
  padding: 16px 20px;
}

.site-header__nav--open {
  display: block;
}

.site-header__menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-header__link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 14px;
  color: var(--color-ink);
  font-weight: 800;
  text-decoration: none;
  border: 2px solid transparent;
}

.site-header__link:hover,
.site-header__link[aria-current="page"] {
  background-color: var(--color-secondary);
  border-color: var(--color-ink);
  box-shadow: 2px 2px 0 #171717;
  text-decoration: none;
}

@media (min-width: 768px) {
  .site-header__toggle {
    display: none;
  }
  .site-header__nav {
    display: block;
    position: static;
    background: transparent;
    border-bottom: none;
    padding: 0;
  }
  .site-header__menu {
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }
}

/* ==========================================================================
   首屏区块 (Hero — 超大粗体标题 + 高对比色块 + 硬边图示)
   ========================================================================== */
.hero-panel {
  padding: 52px 0 64px;
  border-bottom: var(--border-heavy);
  background-color: var(--color-surface);
}

.hero-panel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.hero-panel__title {
  font-size: clamp(2.15rem, 4.6vw, 3.4rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  margin-bottom: 20px;
  background-color: var(--color-secondary);
  border: var(--border-thick);
  box-shadow: var(--shadow-md);
  padding: 16px 20px;
}

.hero-panel__subtitle {
  font-size: clamp(1.08rem, 1.6vw, 1.25rem);
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-ink);
  margin-bottom: 28px;
  max-width: 580px;
}

.hero-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.hero-panel__trust {
  padding: 14px 16px;
  background-color: var(--color-bg);
  border: var(--border-thick);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-ink);
}

.hero-panel__trust-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.hero-panel__trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-panel__trust-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border: 1px solid var(--color-ink);
  display: inline-block;
  flex-shrink: 0;
}

.hero-panel__diagram {
  border: var(--border-heavy);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-lg);
  padding: 18px;
}

.hero-panel__diagram-caption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: var(--border-thick);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

@media (min-width: 920px) {
  .hero-panel {
    padding: 76px 0 84px;
  }
  .hero-panel__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
  }
}

/* ==========================================================================
   核心特性网格 (Features — 硬边粗框卡片 + 物理微移反馈)
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.feature-grid__item {
  padding: 28px 24px;
  background-color: var(--color-surface);
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.feature-grid__item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
  background-color: var(--color-secondary);
}

.feature-grid__icon {
  width: 44px;
  height: 44px;
  padding: 6px;
  background-color: var(--color-accent);
  border: var(--border-thick);
  color: var(--color-ink);
  flex-shrink: 0;
}

.feature-grid__title {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-ink);
  line-height: 1.3;
}

.feature-grid__desc {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.65;
}

@media (min-width: 680px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   使用场景矩阵 (使用场景卡 — 4 张)
   ========================================================================== */
.scenario-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.scenario-board__card {
  background-color: var(--color-bg);
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.scenario-board__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
}

.scenario-board__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: var(--border-thick);
}

.scenario-board__title {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--color-ink);
}

.scenario-board__device {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-ink);
  background-color: var(--color-secondary);
  padding: 4px 10px;
  border: var(--border-thick);
}

.scenario-board__desc {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.65;
}

@media (min-width: 768px) {
  .scenario-board {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   流媒体与 AI 支持矩阵
   ========================================================================== */
.support-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.support-matrix__cell {
  padding: 24px;
  background-color: var(--color-surface);
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.support-matrix__cell:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
}

.support-matrix__top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: var(--border-thick);
}

.support-matrix__icon {
  width: 32px;
  height: 32px;
  padding: 4px;
  background-color: var(--color-secondary);
  border: var(--border-thick);
  color: var(--color-ink);
  flex-shrink: 0;
}

.support-matrix__name {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--color-ink);
}

.support-matrix__note {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.6;
}

.support-footnote {
  margin-top: 20px;
  padding: 12px 16px;
  background-color: var(--color-surface);
  border: var(--border-thick);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-ink);
}

@media (min-width: 640px) {
  .support-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .support-matrix {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   定价档位表 (Pricing — 粗边框 + 推荐档位高对比柠檬黄色块)
   ========================================================================== */
.plan-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: stretch;
}

.plan-matrix__card {
  background-color: var(--color-bg);
  border: var(--border-heavy);
  box-shadow: var(--shadow-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.plan-matrix__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.plan-matrix__card--featured {
  background-color: var(--color-secondary);
  border: var(--border-heavy);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.plan-matrix__badge {
  display: inline-block;
  align-self: flex-start;
  background-color: var(--color-accent);
  color: var(--color-ink);
  border: var(--border-thick);
  box-shadow: 2px 2px 0 #171717;
  font-size: 0.85rem;
  font-weight: 900;
  padding: 4px 12px;
  margin-bottom: 14px;
}

.plan-matrix__audience {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.plan-matrix__name {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.plan-matrix__price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: var(--border-thick);
}

.plan-matrix__price {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--color-ink);
}

.plan-matrix__period {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-ink);
}

.plan-matrix__billing {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-ink);
  background-color: var(--color-surface);
  border: var(--border-thick);
  padding: 6px 10px;
  margin-bottom: 20px;
}

.plan-matrix__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.plan-matrix__feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
}

.plan-matrix__check {
  width: 20px;
  height: 20px;
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-ink);
  color: var(--color-ink);
  flex-shrink: 0;
  margin-top: 2px;
}

@media (min-width: 900px) {
  .plan-matrix {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   常见问题手风琴 (FAQ — 粗边框折叠面板)
   ========================================================================== */
.faq-list {
  max-width: 840px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-list__item {
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  background-color: var(--color-bg);
}

.faq-list__trigger {
  width: 100%;
  min-height: 58px;
  padding: 16px 20px;
  background-color: var(--color-surface);
  border: none;
  text-align: left;
  font-family: inherit;
  font-size: 1.08rem;
  font-weight: 900;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}

.faq-list__trigger:hover {
  background-color: var(--color-secondary);
}

.faq-list__trigger[aria-expanded="true"] {
  background-color: var(--color-secondary);
  border-bottom: var(--border-thick);
}

.faq-list__indicator {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 900;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface);
  border: var(--border-thick);
  color: var(--color-ink);
  flex-shrink: 0;
}

.faq-list__content {
  padding: 18px 20px;
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--color-ink);
  background-color: var(--color-surface);
  line-height: 1.7;
}

.faq-list__content[hidden] {
  display: none;
}

/* ==========================================================================
   底部行动转化区 (Final CTA — 醒目撞色块)
   ========================================================================== */
.final-banner {
  padding: 64px 0;
  background-color: var(--color-secondary);
  color: var(--color-ink);
  border-bottom: var(--border-heavy);
}

.final-banner__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 28px;
  background-color: var(--color-surface);
  border: var(--border-heavy);
  box-shadow: var(--shadow-lg);
}

.final-banner__title {
  font-size: clamp(1.55rem, 2.6vw, 2.15rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.final-banner__desc {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-ink-muted);
  max-width: 620px;
}

@media (min-width: 768px) {
  .final-banner__inner {
    flex-direction: row;
    align-items: center;
  }
}

/* ==========================================================================
   页脚 (Footer)
   ========================================================================== */
.site-footer {
  background-color: var(--color-bg);
  padding: 44px 0 92px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-ink);
}

@media (min-width: 768px) {
  .site-footer {
    padding: 44px 0;
  }
}

.site-footer__top {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: var(--border-thick);
}

.site-footer__nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 10px;
  color: var(--color-ink);
  font-weight: 800;
  text-decoration: none;
  border: 2px solid transparent;
}

.site-footer__link:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-ink);
}

.site-footer__bottom {
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .site-footer__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .site-footer__bottom {
    flex-direction: row;
    align-items: center;
  }
}

/* ==========================================================================
   移动端吸底转化栏 (Sticky Mobile CTA)
   ========================================================================== */
.sticky-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  background-color: var(--color-secondary);
  border-top: var(--border-heavy);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transform: translateY(100%);
  transition: transform 0.18s ease;
}

.sticky-bar--visible {
  transform: translateY(0);
}

.sticky-bar__text {
  font-size: 0.9rem;
  font-weight: 900;
  color: var(--color-ink);
}

.sticky-bar__btn {
  min-height: 44px;
  padding: 8px 18px;
  font-size: 0.92rem;
}

@media (min-width: 768px) {
  .sticky-bar {
    display: none !important;
  }
}

/* ==========================================================================
   指南列表页与文章内页通用组件 (Breadcrumb / Guide Grid / Article)
   ========================================================================== */
.breadcrumb-bar {
  padding: 12px 0;
  border-bottom: var(--border-thick);
  background-color: var(--color-surface);
  font-size: 0.92rem;
  font-weight: 700;
}

.breadcrumb-bar__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb-bar__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink);
}

.breadcrumb-bar__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 2px 8px;
  color: var(--color-ink);
  font-weight: 800;
}

.guide-catalog {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.guide-catalog__card {
  background-color: var(--color-surface);
  border: var(--border-thick);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.guide-catalog__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.guide-catalog__thumb {
  border-bottom: var(--border-thick);
  background-color: var(--color-secondary);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.guide-catalog__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: space-between;
  gap: 16px;
}

.guide-catalog__meta {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-ink);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 10px;
}

.guide-catalog__title {
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1.35;
  margin-bottom: 10px;
}

.guide-catalog__title-link {
  color: var(--color-ink);
  text-decoration: none;
}

.guide-catalog__title-link:hover {
  background-color: var(--color-secondary);
  text-decoration: underline;
}

.guide-catalog__excerpt {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.65;
}

.guide-catalog__more {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  min-height: 44px;
  padding: 6px 16px;
  background-color: var(--color-accent);
  border: var(--border-thick);
  box-shadow: 2px 2px 0 #171717;
  font-weight: 900;
  font-size: 0.94rem;
  color: var(--color-ink);
  text-decoration: none;
}

.guide-catalog__more:hover {
  background-color: var(--color-ink);
  color: var(--color-secondary);
}

@media (min-width: 768px) {
  .guide-catalog {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .guide-catalog {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 文章与合规页阅读容器 */
.article-shell {
  max-width: var(--reading-max);
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.article-doc {
  background-color: var(--color-surface);
  border: var(--border-heavy);
  box-shadow: var(--shadow-md);
  padding: 32px 24px;
}

@media (min-width: 680px) {
  .article-doc {
    padding: 44px 40px;
  }
}

.article-doc__header {
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: var(--border-heavy);
}

.article-doc__title {
  font-size: clamp(1.75rem, 3.2vw, 2.4rem);
  font-weight: 900;
  line-height: 1.22;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.article-doc__meta {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-ink);
  background-color: var(--color-secondary);
  border: var(--border-thick);
  padding: 8px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.article-doc__content h2 {
  font-size: 1.42rem;
  font-weight: 900;
  color: var(--color-ink);
  margin: 36px 0 14px;
  padding: 10px 14px;
  background-color: var(--color-bg);
  border: var(--border-thick);
  box-shadow: 3px 3px 0 #171717;
}

.article-doc__content h3 {
  font-size: 1.16rem;
  font-weight: 900;
  color: var(--color-ink);
  margin: 24px 0 10px;
}

.article-doc__content p {
  margin-bottom: 18px;
  font-size: 1.02rem;
  font-weight: 500;
  line-height: 1.78;
  color: var(--color-ink);
}

.article-doc__content ul,
.article-doc__content ol {
  margin: 0 0 20px 22px;
  list-style-position: outside;
}

.article-doc__content li {
  margin-bottom: 10px;
  line-height: 1.7;
  font-weight: 500;
}

.article-doc__table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
}

.article-doc__table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  font-size: 0.95rem;
}

.article-doc__table th,
.article-doc__table td {
  padding: 12px 14px;
  border: var(--border-thick);
  text-align: left;
}

.article-doc__table th {
  background-color: var(--color-secondary);
  font-weight: 900;
}

.article-doc__callout {
  background-color: var(--color-secondary);
  border: var(--border-thick);
  box-shadow: var(--shadow-sm);
  padding: 18px 20px;
  margin: 24px 0;
}

.article-doc__cta-box {
  margin-top: 40px;
  padding: 28px;
  background-color: var(--color-bg);
  border: var(--border-heavy);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-doc__related {
  margin-top: 40px;
  padding-top: 24px;
  border-top: var(--border-heavy);
}

.article-doc__related-list {
  list-style: none;
  margin: 14px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.article-doc__related-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 16px;
  background-color: var(--color-bg);
  border: var(--border-thick);
  box-shadow: 3px 3px 0 #171717;
  font-weight: 800;
  text-decoration: none;
}

.article-doc__related-link:hover {
  background-color: var(--color-secondary);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 #171717;
}