/* ====================================================================
   SSRDOG (ssrdog.fit) — Layer 1.5 Bauhaus Conversion UI 样式表
   设计基因：形式追随功能 · 原色几何构图 · 严密网格与非对称视觉层级
   配色系统：#F3F0E8 / #202020 / #D94A38 / #E8C547 / #315A85 / #FFFFFF
   命名规范：BEM (全站统一)
   ==================================================================== */

:root {
  --color-bg: #F3F0E8;
  --color-surface: #FFFFFF;
  --color-text: #202020;
  --color-muted: #3D3D3D;
  --color-border: #202020;
  --color-secondary: #D94A38;
  --color-accent: #E8C547;
  --color-supporting: #315A85;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --max-width: 1160px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  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;
  background-color: var(--color-bg);
  color: var(--color-text);
}

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

a {
  color: var(--color-supporting);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

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

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

/* 跳过导航无障碍链接 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 1000;
  padding: 10px 18px;
  background-color: var(--color-text);
  color: var(--color-accent);
  border: 2px solid var(--color-text);
  text-decoration: none;
  font-weight: 700;
}

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

/* 严密网格容器 */
.layout-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* 顶部固定导航 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(243, 240, 232, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--color-border);
}

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

.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  min-height: 44px;
}

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

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-secondary);
  color: var(--color-surface);
  border: 2px solid var(--color-border);
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 2px 2px 0 var(--color-border);
  transition: transform 0.15s ease;
}

.site-header__logo:hover .site-header__logo-mark {
  transform: translate(-1px, -1px);
  background-color: var(--color-text);
  color: var(--color-accent);
}

.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: 2px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--color-border);
}

.site-header__toggle:hover {
  background-color: var(--color-text);
  color: var(--color-surface);
}

.site-header__nav {
  display: none;
  position: absolute;
  top: 70px;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 18px 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: 0 14px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.site-header__link:hover,
.site-header__link[aria-current="page"] {
  background-color: var(--color-accent);
  color: var(--color-text);
  border-color: var(--color-border);
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  background-color: var(--color-secondary);
  color: var(--color-surface);
  text-decoration: none;
  font-weight: 800;
  font-size: 0.9375rem;
  border: 2px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.site-header__cta:hover {
  background-color: var(--color-text);
  color: var(--color-accent);
  transform: translate(-1px, -1px);
}

/* 包豪斯按钮：悬停色彩反转 (Clear Color Inversion on Hover) */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid var(--color-border);
  box-shadow: 4px 4px 0 var(--color-border);
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-action--primary:hover {
  background-color: var(--color-text);
  color: var(--color-accent);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-secondary);
}

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

.btn-action--secondary:hover {
  background-color: var(--color-text);
  color: var(--color-surface);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-supporting);
}

/* 首屏 Hero：包豪斯几何非对称网格 */
.hero-panel {
  padding: 48px 0 56px;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg);
  position: relative;
}

.hero-panel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: stretch;
}

.hero-panel__content {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: 6px 6px 0 var(--color-border);
  padding: 32px 24px;
  position: relative;
}

.hero-panel__geo-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--color-border);
}

.hero-panel__shape-circle {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  border: 2px solid var(--color-border);
}

.hero-panel__shape-square {
  width: 16px;
  height: 16px;
  background-color: var(--color-supporting);
  border: 2px solid var(--color-border);
}

.hero-panel__shape-rect {
  width: 32px;
  height: 16px;
  background-color: var(--color-accent);
  border: 2px solid var(--color-border);
}

.hero-panel__geo-text {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--color-text);
  margin-left: 4px;
}

.hero-panel__title {
  font-size: clamp(1.9rem, 4.2vw, 2.85rem);
  line-height: 1.18;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.hero-panel__subtitle {
  font-size: 1.125rem;
  color: var(--color-muted);
  margin-bottom: 28px;
  max-width: 56ch;
}

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

.hero-panel__facts {
  border-top: 2px solid var(--color-border);
  padding-top: 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px 20px;
  list-style: none;
}

.hero-panel__fact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--color-text);
  font-weight: 600;
}

.hero-panel__fact-dot {
  width: 12px;
  height: 12px;
  background-color: var(--color-accent);
  border: 2px solid var(--color-border);
  flex-shrink: 0;
}

.hero-panel__visual {
  border: 2px solid var(--color-border);
  background-color: var(--color-supporting);
  box-shadow: 6px 6px 0 var(--color-border);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-panel__visual-img {
  width: 100%;
  height: auto;
  border: 2px solid var(--color-border);
  background-color: var(--color-surface);
}

/* 通用区块布局与非对称网格标题 (Asymmetric Grid Section Header) */
.page-section {
  padding: 64px 0;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg);
}

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

.page-section__header {
  margin-bottom: 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
}

.page-section__index-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-section__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 32px;
  padding: 0 10px;
  background-color: var(--color-text);
  color: var(--color-accent);
  font-weight: 800;
  font-size: 0.9rem;
}

.page-section__marker {
  width: 14px;
  height: 14px;
  background-color: var(--color-secondary);
  border: 2px solid var(--color-border);
}

.page-section__marker--circle {
  border-radius: 50%;
  background-color: var(--color-supporting);
}

.page-section__title {
  font-size: clamp(1.55rem, 3vw, 2.1rem);
  line-height: 1.25;
  font-weight: 800;
  color: var(--color-text);
}

.page-section__desc {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 62ch;
}

/* 模块 1：使用场景卡 (包豪斯左边框色块区分) */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.scenario-card {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: 4px 4px 0 var(--color-border);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.scenario-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-supporting);
}

.scenario-card__meta {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-text);
  background-color: var(--color-accent);
  border: 2px solid var(--color-border);
  padding: 4px 12px;
  align-self: flex-start;
}

.scenario-card__title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text);
}

.scenario-card__desc {
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* 模块 2：功能特点 Features（编号化几何模块 Numbered Modules） */
.feature-ledger {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 2px solid var(--color-border);
  border-left: 2px solid var(--color-border);
}

.feature-ledger__item {
  background-color: var(--color-bg);
  border-right: 2px solid var(--color-border);
  border-bottom: 2px solid var(--color-border);
  padding: 30px 24px;
  position: relative;
  transition: background-color 0.15s ease;
}

.feature-ledger__item:hover {
  background-color: var(--color-surface);
}

.feature-ledger__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.feature-ledger__num {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-surface);
  background-color: var(--color-text);
  padding: 4px 10px;
  border: 2px solid var(--color-border);
}

.feature-ledger__icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.feature-ledger__item:hover .feature-ledger__icon {
  transform: rotate(6deg);
  background-color: var(--color-secondary);
  color: var(--color-surface);
}

.feature-ledger__title {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--color-text);
}

.feature-ledger__text {
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* 模块 3 & 5：流媒体支持与 AI 支持矩阵 */
.support-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.support-matrix__item {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.support-matrix__item:hover {
  transform: translate(-2px, -2px);
  background-color: var(--color-bg);
}

.support-matrix__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.support-matrix__icon {
  color: var(--color-secondary);
  flex-shrink: 0;
}

.support-matrix__name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-text);
}

.support-matrix__note {
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* 模块 4：定价方案 Pricing（几何对比与强选中标记） */
.price-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: stretch;
}

.price-matrix__card {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  box-shadow: 4px 4px 0 var(--color-border);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease;
}

.price-matrix__card:hover {
  transform: translate(-2px, -2px);
}

.price-matrix__card--featured {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  box-shadow: 8px 8px 0 var(--color-secondary);
  position: relative;
}

.price-matrix__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-accent);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 5px 12px;
  margin-bottom: 14px;
  align-self: flex-start;
}

.price-matrix__badge::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  border: 1.5px solid var(--color-border);
}

.price-matrix__audience {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-supporting);
  margin-bottom: 6px;
}

.price-matrix__name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 14px;
}

.price-matrix__cost {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
}

.price-matrix__amount {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-text);
}

.price-matrix__period {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-muted);
}

.price-matrix__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.price-matrix__feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
}

.price-matrix__check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background-color: var(--color-accent);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 3px;
}

.price-matrix__cta {
  width: 100%;
}

/* 模块 6：Benefits 线路架构对比表 */
.benefit-table-wrap {
  overflow-x: auto;
  border: 2px solid var(--color-border);
  box-shadow: 5px 5px 0 var(--color-border);
  background-color: var(--color-surface);
}

.benefit-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.benefit-table th,
.benefit-table td {
  padding: 16px 18px;
  border-bottom: 1.5px solid var(--color-border);
  border-right: 1.5px solid var(--color-border);
}

.benefit-table th {
  background-color: var(--color-accent);
  font-weight: 800;
  color: var(--color-text);
}

.benefit-table td {
  color: var(--color-muted);
}

.benefit-table__highlight {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-weight: 700;
}

/* 模块 7：FAQ 手风琴 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 860px;
}

.faq-list__item {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: 3px 3px 0 var(--color-border);
}

.faq-list__button {
  width: 100%;
  min-height: 56px;
  padding: 16px 20px;
  background: none;
  border: none;
  text-align: left;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.faq-list__button:hover {
  background-color: var(--color-bg);
}

.faq-list__button[aria-expanded="true"] {
  background-color: var(--color-accent);
}

.faq-list__indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-text);
  color: var(--color-surface);
  font-size: 1.1rem;
  font-weight: 800;
  flex-shrink: 0;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.faq-list__button[aria-expanded="true"] .faq-list__indicator {
  transform: rotate(45deg);
  background-color: var(--color-secondary);
}

.faq-list__panel {
  padding: 16px 20px 20px;
  color: var(--color-text);
  font-size: 0.95rem;
  border-top: 2px solid var(--color-border);
  background-color: var(--color-surface);
}

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

/* Final CTA 模块（包豪斯对比横幅，独立类名避免与 page-section 冲突） */
.final-cta-banner {
  padding: 64px 0;
  background-color: var(--color-supporting);
  color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

.final-cta-banner__inner {
  background-color: var(--color-text);
  border: 2px solid var(--color-border);
  box-shadow: 8px 8px 0 var(--color-accent);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.final-cta-banner__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--color-surface);
  margin-bottom: 8px;
}

.final-cta-banner__sub {
  font-size: 1rem;
  color: var(--color-bg);
}

/* 页脚 Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--color-surface);
  border-top: 2px solid var(--color-border);
  padding: 40px 0 92px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

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

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  list-style: none;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
}

.site-footer__link:hover {
  color: var(--color-secondary);
  text-decoration: underline;
}

.site-footer__disclosure {
  padding-top: 16px;
  border-top: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* 移动端吸底 CTA */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background-color: var(--color-accent);
  border-top: 2px solid var(--color-border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transform: translateY(100%);
  transition: transform 0.2s ease;
}

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

.mobile-sticky-bar__text {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-text);
}

.mobile-sticky-bar__btn {
  min-height: 44px;
  padding: 8px 18px;
  font-size: 0.9rem;
  white-space: nowrap;
  box-shadow: 2px 2px 0 var(--color-border);
}

/* 面包屑导航 */
.breadcrumb-bar {
  padding: 14px 0;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-surface);
  font-size: 0.9rem;
}

.breadcrumb-bar__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.breadcrumb-bar__item + .breadcrumb-bar__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-text);
}

/* 指南页文章卡片列表 */
.guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.guide-card {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: 5px 5px 0 var(--color-border);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.guide-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--color-secondary);
}

.guide-card__thumb {
  width: 100%;
  height: auto;
  border-bottom: 2px solid var(--color-border);
  background-color: var(--color-bg);
}

.guide-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.guide-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-supporting);
  margin-bottom: 10px;
}

.guide-card__title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.35;
}

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

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

.guide-card__excerpt {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  flex-grow: 1;
}

.guide-card__readmore {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 16px;
  background-color: var(--color-accent);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  font-weight: 800;
  text-decoration: none;
  align-self: flex-start;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.guide-card__readmore:hover {
  background-color: var(--color-text);
  color: var(--color-surface);
}

/* 文章页与合规页正文排版 */
.article-shell {
  padding: 48px 0 64px;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  box-shadow: 6px 6px 0 var(--color-border);
  padding: 32px 24px;
}

.article-content__header {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 24px;
  margin-bottom: 28px;
}

.article-content__title {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  line-height: 1.3;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 14px;
}

.article-content__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-supporting);
}

.article-content__body h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text);
  margin: 34px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.article-content__body h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-text);
  margin: 22px 0 10px;
}

.article-content__body p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.article-content__body ul,
.article-content__body ol {
  margin: 0 0 18px 22px;
  color: var(--color-text);
}

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

.article-content__callout {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-left: 8px solid var(--color-secondary);
  padding: 18px 20px;
  margin: 24px 0;
}

.article-content__cta-box {
  margin-top: 36px;
  padding: 28px 24px;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  box-shadow: 5px 5px 0 var(--color-secondary);
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.article-content__related {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 2px solid var(--color-border);
}

/* 响应式断点：平板与桌面（非对称网格展开） */
@media (min-width: 768px) {
  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: flex;
    position: static;
    background: none;
    border: none;
    padding: 0;
    align-items: center;
    gap: 20px;
  }

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

  .hero-panel {
    padding: 64px 0 76px;
  }

  .hero-panel__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
  }

  .hero-panel__content {
    padding: 44px 40px;
  }

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

  .page-section__header {
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 32px;
  }

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

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

  .support-matrix {
    grid-template-columns: repeat(3, 1fr);
  }

  .price-matrix {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .final-cta-banner__inner {
    flex-direction: row;
    align-items: center;
    padding: 44px 48px;
  }

  .site-footer {
    padding-bottom: 44px;
  }

  .mobile-sticky-bar {
    display: none;
  }

  .article-content {
    padding: 44px 48px;
  }
}

@media (min-width: 1024px) {
  .feature-ledger {
    grid-template-columns: repeat(4, 1fr);
  }

  .guide-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}