/* ===================================================
   微风网络 BreezeNetwork - The Luxury of Silence
   Art Direction: Near-Monochrome Minimalism
   Palette:
     White:       #FFFFFF
     Grey:        #8A8A85
     Faint Stone: #C9C9C4
     Ink:         #2A2A28
   Typography:
     Jost Light (300) for oversized display
     Jost Regular (400) for body
   Mood:
     Held breath, soft focus.
     No borders, no shadows, no color anywhere.
     Buttons rendered as underlined text links.
   =================================================== */

:root {
  --color-white: #FFFFFF;
  --color-grey: #8A8A85;
  --color-faint-stone: #C9C9C4;
  --color-ink: #2A2A28;

  --font-display: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

  --tracking-tight: 0.05em;
  --tracking-normal: 0.12em;
  --tracking-wide: 0.22em;
  --tracking-huge: 0.32em;

  --transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

/* 基础重置 - 彻底移除边框和阴影 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none !important;
}

html {
  scroll-behavior: smooth;
  background-color: var(--color-white);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background-color: var(--color-white);
  color: var(--color-ink);
  line-height: 1.8;
  letter-spacing: var(--tracking-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 容器排版 */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 40px;
}

/* 页眉与导航 */
.header {
  padding: 38px 0;
  background-color: var(--color-white);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: var(--color-ink);
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.15rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--color-grey);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  transition: var(--transition);
  position: relative;
  padding-bottom: 4px;
}

.nav-link:hover,
.nav-link.current {
  color: var(--color-ink);
}

.nav-link.current::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-ink);
}

.nav-link.cta-link {
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
}

/* 按钮规范：全部渲染为下划线文本链接 (Buttons rendered as underlined text links) */
.btn-link,
.text-link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--color-ink);
  transition: var(--transition);
  cursor: pointer;
  background: transparent;
}

.btn-link:hover,
.text-link:hover {
  color: var(--color-grey);
  border-bottom-color: var(--color-grey);
  letter-spacing: var(--tracking-huge);
}

.btn-link.muted {
  color: var(--color-grey);
  border-bottom-color: var(--color-faint-stone);
}

.btn-link.muted:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}

/* 主视觉区 (Hero Section) - One element per screen feel */
.hero {
  min-height: 82vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 0 100px;
}

.sub-label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  margin-bottom: 30px;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.4rem, 4.6vw, 4.4rem);
  line-height: 1.25;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 36px;
}

.hero-title .brand-en {
  display: block;
  font-size: clamp(1.6rem, 3.2vw, 3rem);
  letter-spacing: var(--tracking-huge);
  color: var(--color-grey);
  margin-top: 10px;
  font-weight: 300;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-grey);
  max-width: 680px;
  margin: 0 auto 52px;
  line-height: 2;
  letter-spacing: var(--tracking-normal);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  max-width: 860px;
  margin: 0 auto;
  padding-top: 60px;
  border-top: 1px solid var(--color-faint-stone);
}

.metric-item {
  text-align: center;
}

.metric-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.78rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-grey);
}

/* 核心章节公共样式 */
.section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.section-tag {
  font-size: 0.78rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 2.2rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 20px;
}

.section-desc {
  font-size: 0.96rem;
  color: var(--color-grey);
  line-height: 1.9;
  letter-spacing: var(--tracking-normal);
}

/* 核心优势：3个图文卡片 (近单色纯净无边框排版) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.feature-card {
  padding: 20px 10px;
  background: transparent;
  transition: var(--transition);
}

.feature-number {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-faint-stone);
  margin-bottom: 24px;
}

.feature-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.25rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 16px;
}

.feature-text {
  font-size: 0.9rem;
  color: var(--color-grey);
  line-height: 1.9;
  margin-bottom: 24px;
}

.feature-spec-list {
  list-style: none;
  font-size: 0.84rem;
  color: var(--color-grey);
}

.feature-spec-list li {
  margin-bottom: 10px;
  letter-spacing: var(--tracking-normal);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-spec-list li::before {
  content: "—";
  color: var(--color-faint-stone);
}

/* 流媒体与 AI 支持图卡 */
.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 56px;
}

.support-card {
  padding: 30px 0;
  background: transparent;
}

.support-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.35rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 14px;
}

.support-text {
  font-size: 0.92rem;
  color: var(--color-grey);
  line-height: 1.9;
  margin-bottom: 26px;
}

.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.tag-item {
  font-size: 0.82rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-faint-stone);
  padding-bottom: 2px;
}

/* 套餐价格对比表 - 参考网上真实价格体系 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  align-items: flex-start;
}

.pricing-card {
  padding: 40px 32px;
  background: transparent;
  transition: var(--transition);
  position: relative;
}

.pricing-card.featured {
  background: #FAFAFA;
}

.plan-badge {
  font-size: 0.72rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  margin-bottom: 14px;
}

.plan-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.35rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--color-grey);
  line-height: 1.7;
  min-height: 48px;
  margin-bottom: 30px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 34px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--color-faint-stone);
}

.currency {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--color-ink);
}

.price-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 300;
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  line-height: 1;
}

.price-cycle {
  font-size: 0.82rem;
  color: var(--color-grey);
  letter-spacing: var(--tracking-normal);
}

.plan-features {
  list-style: none;
  margin-bottom: 40px;
}

.plan-features li {
  font-size: 0.86rem;
  color: var(--color-grey);
  line-height: 1.8;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li::before {
  content: "—";
  color: var(--color-faint-stone);
}

/* 用户口碑评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.review-card {
  background: transparent;
  padding: 10px 0;
}

.review-quote {
  font-size: 0.92rem;
  color: var(--color-grey);
  line-height: 2;
  margin-bottom: 24px;
}

.review-author {
  font-family: var(--font-display);
  font-size: 0.88rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
}

.review-role {
  font-size: 0.78rem;
  letter-spacing: var(--tracking-normal);
  color: var(--color-grey);
}

/* 常见问题解答 (FAQ) - 原生 details 极简设计 */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-faint-stone);
  padding: 24px 0;
  background: transparent;
}

.faq-item summary {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--color-grey);
  transition: var(--transition);
}

.faq-item[open] summary::after {
  content: "—";
}

.faq-content {
  padding-top: 16px;
  font-size: 0.9rem;
  line-height: 2;
  color: var(--color-grey);
}

/* 底部静谧召唤 */
.bottom-cta-wrap {
  text-align: center;
  padding: 140px 0 100px;
}

.bottom-cta-wrap h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 2.2rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 24px;
}

.bottom-cta-wrap p {
  color: var(--color-grey);
  max-width: 580px;
  margin: 0 auto 40px;
  font-size: 0.95rem;
  line-height: 1.9;
}

/* 页脚：极简留白，只保留四个标题项 */
.footer {
  padding: 70px 0 50px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-faint-stone);
  margin-top: auto;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.footer-link {
  font-size: 0.88rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-grey);
  text-decoration: none;
  transition: var(--transition);
  padding-bottom: 2px;
}

.footer-link:hover {
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
}

.footer-copyright {
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-faint-stone);
}

/* 通用独立子页面 */
.page-header {
  padding: 80px 0 40px;
  border-bottom: 1px solid var(--color-faint-stone);
  margin-bottom: 60px;
}

.page-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 2.8rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 16px;
}

.page-intro {
  color: var(--color-grey);
  font-size: 1rem;
  max-width: 680px;
  line-height: 2;
}

.content-box {
  margin-bottom: 80px;
}

.content-box h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.35rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin: 48px 0 18px;
}

.content-box h2:first-child {
  margin-top: 0;
}

.content-box p {
  color: var(--color-grey);
  margin-bottom: 20px;
  font-size: 0.95rem;
  line-height: 2;
}

.content-box ul {
  list-style: none;
  margin-bottom: 30px;
}

.content-box ul li {
  color: var(--color-grey);
  margin-bottom: 12px;
  font-size: 0.92rem;
  line-height: 1.9;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.content-box ul li::before {
  content: "—";
  color: var(--color-faint-stone);
}

.article-item {
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--color-faint-stone);
}

/* ===================================================
   推荐资讯模块与文章详情排版 (Insights & Articles)
   =================================================== */

/* 资讯卡片网格 (首页与列表页复用) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.article-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 32px 0;
  border-top: 1px solid var(--color-faint-stone);
  transition: var(--transition);
}

.article-card-header {
  margin-bottom: 14px;
}

.article-category {
  font-size: 0.76rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  display: inline-block;
}

.article-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.22rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  line-height: 1.45;
  margin: 12px 0 14px;
}

.article-title a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.article-title a:hover {
  color: var(--color-grey);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--color-grey);
  line-height: 1.85;
  margin-bottom: 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--color-grey);
  letter-spacing: var(--tracking-normal);
  margin-bottom: 20px;
}

.article-meta span::after {
  content: "·";
  margin-left: 16px;
  color: var(--color-faint-stone);
}

.article-meta span:last-child::after {
  content: "";
  margin-left: 0;
}

.articles-more-wrap {
  text-align: center;
  margin-top: 60px;
}

/* 文章详情页专用排版 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  letter-spacing: var(--tracking-normal);
  color: var(--color-grey);
  margin-bottom: 30px;
}

.breadcrumb a {
  color: var(--color-grey);
  text-decoration: none;
  transition: var(--transition);
}

.breadcrumb a:hover {
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
}

.breadcrumb-separator {
  color: var(--color-faint-stone);
}

.article-header {
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-faint-stone);
  margin-bottom: 50px;
}

.article-header .article-category {
  margin-bottom: 16px;
}

.article-main-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  line-height: 1.3;
  margin-bottom: 24px;
}

.article-full-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 0.82rem;
  color: var(--color-grey);
  letter-spacing: var(--tracking-normal);
}

.article-body {
  max-width: 820px;
  margin: 0 auto 80px;
}

.article-body h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-faint-stone);
}

.article-body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.2rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin: 32px 0 14px;
}

.article-body p {
  color: var(--color-grey);
  font-size: 0.96rem;
  line-height: 2.05;
  margin-bottom: 22px;
  letter-spacing: var(--tracking-normal);
}

.article-body p strong {
  color: var(--color-ink);
  font-weight: 600;
}

.article-body ul,
.article-body ol {
  color: var(--color-grey);
  margin: 0 0 28px 0;
  padding-left: 20px;
}

.article-body ul {
  list-style: none;
  padding-left: 0;
}

.article-body ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
  font-size: 0.94rem;
  line-height: 1.95;
}

.article-body ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-faint-stone);
}

.article-body ol {
  list-style: decimal;
  padding-left: 22px;
}

.article-body ol li {
  margin-bottom: 12px;
  font-size: 0.94rem;
  line-height: 1.95;
}

.article-body blockquote {
  margin: 32px 0;
  padding: 20px 24px;
  background: #FAFAFA;
  border-left: 2px solid var(--color-ink);
  color: var(--color-ink);
  font-size: 0.92rem;
  line-height: 1.9;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 0.88rem;
  color: var(--color-grey);
}

.article-body th {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-ink);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
}

.article-body td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-faint-stone);
  line-height: 1.7;
}

.article-body code {
  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.86rem;
  background: #F4F4F2;
  color: var(--color-ink);
  padding: 2px 6px;
  letter-spacing: 0;
}

.article-body pre {
  background: #FAFAFA;
  padding: 20px;
  overflow-x: auto;
  margin: 28px 0;
  border-left: 1px solid var(--color-faint-stone);
}

.article-body pre code {
  background: transparent;
  padding: 0;
  line-height: 1.6;
}

.article-body a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-faint-stone);
  transition: var(--transition);
}

.article-body a:hover {
  color: var(--color-grey);
  border-bottom-color: var(--color-ink);
}

/* 文章作者与站点实体 */
.author-entity-box {
  max-width: 820px;
  margin: 60px auto 70px;
  padding: 28px 0;
  border-top: 1px solid var(--color-faint-stone);
  border-bottom: 1px solid var(--color-faint-stone);
  display: flex;
  align-items: center;
  gap: 24px;
}

.author-mark {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-info h4 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 4px;
}

.author-info p {
  font-size: 0.84rem;
  color: var(--color-grey);
  line-height: 1.7;
}

/* 相关推荐文章板块 */
.related-posts-section {
  max-width: 820px;
  margin: 0 auto 90px;
}

.related-posts-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.4rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin-bottom: 30px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-faint-stone);
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.related-card {
  padding: 20px 0;
}

.related-card-category {
  font-size: 0.72rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  display: block;
  margin-bottom: 8px;
}

.related-card-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.05rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  line-height: 1.5;
  margin-bottom: 10px;
}

.related-card-title a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.related-card-title a:hover {
  color: var(--color-grey);
}

.related-card-date {
  font-size: 0.78rem;
  color: var(--color-grey);
}

/* ===================================================
   响应式媒体查询 (@media) - 确保手机端单栏优雅显示
   =================================================== */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
  .header {
    padding: 24px 0;
  }
  .header-inner {
    flex-direction: column;
    gap: 20px;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px 24px;
  }
  .hero {
    min-height: auto;
    padding: 50px 0 70px;
  }
  .hero-title {
    font-size: 2.2rem;
    letter-spacing: var(--tracking-normal);
  }
  .hero-title .brand-en {
    font-size: 1.5rem;
  }
  .hero-subtitle {
    font-size: 0.95rem;
  }
  .hero-cta-group {
    flex-direction: column;
    gap: 28px;
    margin-bottom: 50px;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .features-grid,
  .support-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid,
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card {
    padding: 30px 20px;
  }
  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }
  .article-full-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .author-entity-box {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ===================================================
   Hero 艺术大图 (Near-monochrome Fine Art Photography)
   =================================================== */
.hero-image-wrap {
  max-width: 900px;
  margin: 50px auto 0;
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid var(--color-faint-stone);
  opacity: 0.95;
  transition: var(--transition);
}

.hero-image-wrap:hover {
  opacity: 1;
}

.hero-art-img {
  width: 100%;
  height: auto;
  display: block;
  filter: contrast(0.96) brightness(1.02);
}

.hero-image-caption {
  padding: 10px 16px;
  text-align: center;
  font-size: 0.76rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  background: #FAFAFA;
  border-top: 1px solid var(--color-faint-stone);
}

/* ===================================================
   文章上一篇 / 下一篇导航 (Previous / Next Navigation)
   =================================================== */
.post-navigation {
  max-width: 820px;
  margin: 50px auto 70px;
  padding: 30px 0;
  border-top: 1px solid var(--color-faint-stone);
  border-bottom: 1px solid var(--color-faint-stone);
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 32px;
}

.post-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.post-nav-item.next {
  text-align: right;
}

.post-nav-label {
  font-size: 0.74rem;
  letter-spacing: var(--tracking-huge);
  text-transform: uppercase;
  color: var(--color-grey);
  margin-bottom: 8px;
}

.post-nav-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 0.98rem;
  letter-spacing: var(--tracking-normal);
  color: var(--color-ink);
  line-height: 1.5;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.post-nav-item:hover .post-nav-title {
  color: var(--color-grey);
  border-bottom-color: var(--color-ink);
}

@media (max-width: 768px) {
  .post-navigation {
    flex-direction: column;
    gap: 24px;
  }
  .post-nav-item.next {
    text-align: left;
  }
}

/* ===================================================
   悬浮返回顶部按钮 (Floating Back-to-Top Button)
   =================================================== */
.floating-back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background-color: var(--color-white);
  border: 1px solid var(--color-faint-stone);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  cursor: pointer;
  z-index: 999;
  text-decoration: none;
  transition: var(--transition);
  outline: none;
}

.floating-back-top:hover {
  background-color: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
  transform: translateY(-3px);
}

.floating-back-top svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}