/* ==========================================================================
   ViKingLinks (vikinglinks.autos) - 全局样式表 (BEM 命名规范)
   Layer 1.5 — Art Deco Conversion UI 设计规范
   配色体系：
   - Background: #17191C
   - Primary:    #F2E5CA
   - Secondary:  #B58A4A
   - Accent:     #7D2938
   - Surface:    #25272A
   - Border:     #66543A
   ========================================================================== */

:root {
  --color-bg: #17191c;
  --color-surface: #25272a;
  --color-surface-alt: #1e2024;
  --color-primary: #f2e5ca;
  --color-text-main: #f2e5ca;
  --color-text-body: #dfd1b4;
  --color-text-muted: #c4b293;
  --color-secondary: #b58a4a;
  --color-secondary-bright: #d4af6a;
  --color-accent: #7d2938;
  --color-accent-light: #9e384a;
  --color-border: #66543a;
  --color-border-light: #4a3e2b;
  --color-status-ok: #d4af6a;
  /* 系统衬线标题字体栈 + 系统无衬线正文字体栈（零外部字体加载，保障 LCP） */
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", "SimSun", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --max-width: 1140px;
  --header-height: 70px;
  --radius-sm: 2px;
  --radius-md: 2px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.68;
  color: var(--color-text-main);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  color: var(--color-text-body);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 50% 0%, rgba(181, 138, 74, 0.08) 0%, transparent 60%);
}

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

a {
  color: var(--color-secondary-bright);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

a:hover {
  color: var(--color-primary);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

ul,
ol {
  list-style: none;
}

/* 辅助无障碍跳转链接 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 1000;
  padding: 10px 18px;
  background-color: var(--color-secondary);
  color: var(--color-bg);
  font-weight: 700;
  border: 1px solid var(--color-primary);
}

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

/* 布局容器 */
.layout-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 768px) {
  .layout-container {
    padding: 0 28px;
  }
}

/* ==========================================================================
   Header 顶部导航（Art Deco 对称金线与优雅下划线过渡）
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(23, 25, 28, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: linear-gradient(90deg, transparent 5%, rgba(181, 138, 74, 0.35) 50%, transparent 95%);
  pointer-events: none;
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.site-header__brand:hover {
  color: var(--color-secondary-bright);
}

.site-header__brand-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.site-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  cursor: pointer;
}

.site-header__nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-secondary);
  padding: 16px 16px 24px;
}

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

.site-header__menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.site-header__link {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--color-primary);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.site-header__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 6px;
  height: 1px;
  background-color: var(--color-secondary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.22s ease;
}

.site-header__link:hover,
.site-header__link--active {
  color: var(--color-secondary-bright);
}

.site-header__link:hover::after,
.site-header__link--active::after {
  transform: scaleX(1);
}

.site-header__cta {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 20px;
  background-color: var(--color-secondary);
  color: var(--color-bg);
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1px solid var(--color-primary);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-header__cta:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-secondary);
}

@media (min-width: 768px) {
  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    position: static;
    align-items: center;
    gap: 28px;
    background: transparent;
    border-bottom: none;
    padding: 0;
  }

  .site-header__menu {
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }

  .site-header__cta {
    margin-top: 0;
  }
}

/* ==========================================================================
   按钮组件 (Art Deco 金黑表面交替过渡与阶梯几何边框)
   ========================================================================== */
.action-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
  border: 1px solid var(--color-border);
  cursor: pointer;
  text-align: center;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease, transform 0.2s ease;
}

.action-btn--primary {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  border-color: var(--color-primary);
  box-shadow: inset 0 0 0 2px var(--color-bg);
}

.action-btn--primary:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-secondary);
  box-shadow: inset 0 0 0 1px var(--color-secondary);
}

.action-btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.action-btn--secondary:hover {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  border-color: var(--color-primary);
}

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

/* ==========================================================================
   Hero 首屏区块（Art Deco 对称中轴构图 + 扇形放射纹饰 + 阶梯外框）
   ========================================================================== */
.hero-panel {
  position: relative;
  padding: 44px 0 56px;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.hero-panel__frame {
  position: relative;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 28px 18px 36px;
}

/* 阶梯内角装饰线 */
.hero-panel__frame::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  border: 1px solid var(--color-border-light);
  pointer-events: none;
}

.hero-panel__grid {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 32px;
}

.hero-panel__content {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-panel__crest {
  width: 140px;
  height: 44px;
  margin-bottom: 16px;
  color: var(--color-secondary);
}

.hero-panel__status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  margin-bottom: 20px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.hero-panel__status-dot {
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  background-color: var(--color-secondary);
}

.hero-panel__title {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.28;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}

.hero-panel__subtitle {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-body);
  max-width: 660px;
  margin-bottom: 28px;
}

.hero-panel__actions {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 440px;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-panel__trust {
  width: 100%;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  text-align: left;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.hero-panel__trust-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 12px;
  background-color: rgba(23, 25, 28, 0.55);
  border-left: 2px solid var(--color-secondary);
}

.hero-panel__trust-label {
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.hero-panel__diagram {
  width: 100%;
  max-width: 860px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 16px;
}

.hero-panel__svg {
  width: 100%;
  height: auto;
}

@media (min-width: 640px) {
  .hero-panel__frame {
    padding: 44px 36px;
  }

  .hero-panel__actions {
    flex-direction: row;
    justify-content: center;
    max-width: none;
  }

  .hero-panel__trust {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .hero-panel {
    padding: 64px 0 76px;
  }

  .hero-panel__frame {
    padding: 56px 52px;
  }

  .hero-panel__title {
    font-size: 2.75rem;
  }
}

/* ==========================================================================
   通用内容模块与 Art Deco 几何分隔线 (Section Block)
   ========================================================================== */
.section-block {
  position: relative;
  padding: 56px 0;
  border-bottom: 1px solid var(--color-border);
}

/* 模块间 Art Deco 菱形与扇形中轴分隔纹饰 */
.section-block::after {
  content: "◆";
  position: absolute;
  bottom: -11px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0 12px;
  background-color: var(--color-bg);
  color: var(--color-secondary);
  font-size: 0.875rem;
  line-height: 1;
}

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

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

.section-block__header {
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-block__title {
  font-family: var(--font-serif);
  font-size: 1.625rem;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.section-block__desc {
  font-size: 1rem;
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .section-block {
    padding: 72px 0;
  }

  .section-block__title {
    font-size: 2rem;
  }
}

/* ==========================================================================
   功能特点模块 (Features - 对称均衡双列 + 悬停金线点亮)
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.feature-grid__item {
  position: relative;
  padding: 28px 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.feature-grid__item::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  border: 1px solid var(--color-border-light);
  pointer-events: none;
  transition: border-color 0.22s ease;
}

.feature-grid__item:hover {
  border-color: var(--color-secondary);
  transform: translateY(-3px);
}

.feature-grid__item:hover::before {
  border-color: rgba(181, 138, 74, 0.45);
}

.feature-grid__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.feature-grid__icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  color: var(--color-secondary-bright);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.feature-grid__tag {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background-color: var(--color-accent);
  padding: 3px 10px;
  border: 1px solid var(--color-secondary);
}

.feature-grid__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.feature-grid__text {
  font-size: 0.9375rem;
  color: var(--color-text-body);
}

@media (min-width: 768px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* ==========================================================================
   使用场景卡 (Scenarios - 4 卡对称网格)
   ========================================================================== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.scenario-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.scenario-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-3px);
}

.scenario-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.scenario-card__title {
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-primary);
}

.scenario-card__device {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-secondary);
  padding: 4px 10px;
}

.scenario-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-body);
}

@media (min-width: 768px) {
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* ==========================================================================
   流媒体支持 & AI 支持矩阵
   ========================================================================== */
.platform-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.platform-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 22px 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: border-color 0.22s ease, transform 0.22s ease;
}

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

.platform-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-2px);
}

.platform-card__icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-secondary);
  color: var(--color-secondary-bright);
  background-color: var(--color-bg);
}

.platform-card__body {
  flex: 1;
}

.platform-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.platform-card__name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
}

.platform-card__badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background-color: var(--color-accent);
  border: 1px solid var(--color-secondary);
  padding: 2px 8px;
}

.platform-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-body);
}

.section-block__notice {
  margin-top: 24px;
  padding: 14px 18px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

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

/* ==========================================================================
   核心优势规格表 (Benefits)
   ========================================================================== */
.spec-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.spec-table th,
.spec-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.spec-table th {
  background-color: var(--color-bg);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--color-secondary);
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table__dim {
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.spec-table__good {
  color: var(--color-primary);
  font-weight: 600;
}

/* ==========================================================================
   定价模块 (Pricing - Art Deco 阶梯双重金框与高对比选中态)
   ========================================================================== */
.plan-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
}

.plan-card {
  position: relative;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.plan-card::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border: 1px solid var(--color-border-light);
  pointer-events: none;
}

.plan-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-3px);
}

.plan-card--featured {
  background-color: var(--color-surface);
  border: 2px solid var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-secondary);
}

.plan-card--featured::before {
  border-color: var(--color-secondary);
}

.plan-card__ribbon {
  display: inline-block;
  align-self: flex-start;
  padding: 5px 14px;
  margin-bottom: 14px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background-color: var(--color-accent);
  color: var(--color-primary);
  border: 1px solid var(--color-secondary);
}

.plan-card__audience {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-secondary-bright);
  margin-bottom: 8px;
}

.plan-card__name {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.plan-card__price-box {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
}

.plan-card__price {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.plan-card__period {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.plan-card__note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.plan-card__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.plan-card__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--color-text-body);
}

.plan-card__check {
  width: 18px;
  height: 18px;
  color: var(--color-secondary-bright);
  flex-shrink: 0;
  margin-top: 3px;
}

@media (min-width: 900px) {
  .plan-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

/* ==========================================================================
   FAQ 手风琴模块
   ========================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease;
}

.faq-item:hover,
.faq-item[open] {
  border-color: var(--color-secondary);
}

.faq-item__summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 54px;
  padding: 16px 22px;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
}

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

.faq-item__indicator {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  font-size: 0.9375rem;
  color: var(--color-secondary-bright);
  background-color: var(--color-bg);
  flex-shrink: 0;
}

.faq-item[open] .faq-item__indicator {
  background-color: var(--color-secondary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

.faq-item__answer {
  padding: 16px 22px 20px;
  font-size: 0.9375rem;
  color: var(--color-text-body);
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Final CTA 模块（对称奢华金线框收尾）
   ========================================================================== */
.final-cta {
  padding: 64px 0;
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-secondary);
}

.final-cta__inner {
  position: relative;
  padding: 36px 24px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.final-cta__title {
  font-family: var(--font-serif);
  font-size: 1.625rem;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.final-cta__desc {
  font-size: 1rem;
  color: var(--color-text-body);
  max-width: 640px;
}

@media (min-width: 768px) {
  .final-cta {
    padding: 80px 0;
  }

  .final-cta__inner {
    padding: 48px 40px;
  }

  .final-cta__title {
    font-size: 2rem;
  }
}

/* ==========================================================================
   指南列表页与文章详情页 (Guides & Articles)
   ========================================================================== */
.breadcrumb-bar {
  padding: 14px 0;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.breadcrumb-bar__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
}

.breadcrumb-bar__item + .breadcrumb-bar__item::before {
  content: "◆";
  font-size: 0.65rem;
  margin-right: 8px;
  color: var(--color-secondary);
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.guide-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.guide-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-3px);
}

.guide-card__media {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.guide-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.guide-card__body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.guide-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--color-secondary-bright);
  margin-bottom: 10px;
}

.guide-card__title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  line-height: 1.42;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.guide-card__title a {
  color: inherit;
}

.guide-card__title a:hover {
  color: var(--color-secondary-bright);
}

.guide-card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-body);
  margin-bottom: 18px;
  flex: 1;
}

.guide-card__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-secondary-bright);
}

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

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

/* 文章页正文排版 */
.article-layout {
  padding: 40px 0 68px;
}

.article-box {
  max-width: 820px;
  margin: 0 auto;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 26px 18px;
}

@media (min-width: 768px) {
  .article-box {
    padding: 44px 52px;
  }
}

.article-box__header {
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--color-border);
}

.article-box__title {
  font-family: var(--font-serif);
  font-size: 1.6875rem;
  line-height: 1.36;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .article-box__title {
    font-size: 2.125rem;
  }
}

.article-box__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--color-secondary-bright);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  line-height: 1.36;
  font-weight: 700;
  color: var(--color-primary);
  margin: 34px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.4;
  font-weight: 700;
  color: var(--color-secondary-bright);
  margin: 24px 0 10px;
}

.article-content p {
  margin-bottom: 16px;
  font-size: 1rem;
  color: var(--color-text-body);
}

.article-content ul,
.article-content ol {
  margin: 0 0 18px 22px;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content code {
  padding: 2px 6px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-size: 0.9em;
}

.article-content__callout {
  margin: 22px 0;
  padding: 18px 22px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
}

.article-content__cta-box {
  margin-top: 38px;
  padding: 26px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-secondary);
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}

@media (min-width: 640px) {
  .article-content__cta-box {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.article-content__related {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--color-border);
}

.article-content__related-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 14px;
}

.article-content__related-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  font-weight: 600;
  color: var(--color-primary);
}

.article-content__related-link:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary-bright);
}

/* ==========================================================================
   Footer 页脚
   ========================================================================== */
.site-footer {
  margin-top: auto;
  padding: 44px 0 92px;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.site-footer__top {
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

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

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-primary);
  font-weight: 500;
}

.site-footer__link:hover {
  color: var(--color-secondary-bright);
}

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

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

/* ==========================================================================
   移动端吸底 CTA (Sticky Bar)
   ========================================================================== */
.sticky-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  background-color: var(--color-surface);
  border-top: 2px solid var(--color-secondary);
  padding: 10px 16px;
  transform: translateY(100%);
  transition: transform 0.22s ease;
}

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

.sticky-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.sticky-bar__text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.sticky-bar__btn {
  min-height: 44px;
  padding: 8px 18px;
  font-size: 0.9375rem;
  white-space: nowrap;
}

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

/* ==========================================================================
   减弱动态效果支持 (prefers-reduced-motion)
   ========================================================================== */
@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;
  }
}