/* ===================================================================
   瞬云 SunYun Cloud - 日系极简 × 暖色编辑式品牌官网样式表
   设计定位：日系杂志排版、编辑式长页面、温润暖色调、重阅读、高留白
   =================================================================== */

:root {
  /* 核心主题色板 */
  --bg-primary: #FFF8F0;      /* 主背景：暖奶油白 */
  --bg-secondary: #F4E9DC;    /* 次级背景：浅米杏色 */
  --bg-card: #FFFFFF;         /* 内容卡片底色：纸感白 */
  --bg-tag: #EFE3D5;          /* 标签背景色 */
  --bg-accent-soft: #EEF4F0;  /* 鼠尾草绿浅淡底色 */
  
  --text-title: #49382F;      /* 标题文字：深咖啡色 */
  --text-body: #66574D;       /* 正文文字：暖灰棕 */
  --text-muted: #8E7D73;      /* 弱化标注：灰褐色 */
  --text-light: #A8998F;      /* 次级辅助文字 */

  --btn-primary: #C76B50;     /* 主按钮：陶土橘 */
  --btn-primary-hover: #B35B42;
  --color-accent: #7D9A8B;    /* 辅助色：鼠尾草绿 */
  --color-accent-dark: #5C7A6B;

  --border-color: #E6D7C8;    /* 分割线与边框 */
  --border-light: #F0E5D8;

  /* 阴影体系：柔和、轻盈、无压迫感 */
  --shadow-sm: 0 2px 8px rgba(73, 56, 47, 0.04);
  --shadow-md: 0 6px 20px rgba(73, 56, 47, 0.06);
  --shadow-lg: 0 12px 32px rgba(73, 56, 47, 0.08);

  /* 圆角与间距 */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-serif: "Noto Serif SC", "Songti SC", "Source Han Serif SC", STSong, Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans GB", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  
  --max-width: 1140px;
  --header-height: 76px;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.85;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  /* 柔和云影背景光效 */
  background-image: 
    radial-gradient(ellipse 60% 40% at 15% 10%, rgba(244, 233, 220, 0.7) 0%, transparent 60%),
    radial-gradient(ellipse 50% 35% at 85% 35%, rgba(199, 107, 80, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 30% 80%, rgba(125, 154, 139, 0.04) 0%, transparent 60%);
  background-attachment: fixed;
}

a {
  color: var(--text-title);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 248, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  transition: all 0.3s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--btn-primary);
}

.brand-icon-wrap svg {
  width: 22px;
  height: 22px;
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title-main {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-title);
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.brand-title-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--btn-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--btn-primary);
  border-radius: var(--radius-full);
}

.header-action {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 按钮规范：日系温润按压质感 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  letter-spacing: 0.03em;
}

.btn-primary {
  background-color: var(--btn-primary);
  color: #FFFFFF !important;
  box-shadow: 0 2px 10px rgba(199, 107, 80, 0.25);
}

.btn-primary:hover {
  background-color: var(--btn-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(199, 107, 80, 0.32);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-title);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background-color: var(--bg-secondary);
  border-color: var(--text-title);
  color: var(--text-title);
}

.btn-secondary {
  background-color: var(--color-accent);
  color: #FFFFFF !important;
}

.btn-secondary:hover {
  background-color: var(--color-accent-dark);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.84rem;
}

.btn-lg {
  padding: 13px 30px;
  font-size: 1rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* 移动端菜单切换 */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--text-title);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.mobile-nav-drawer {
  display: none;
  flex-direction: column;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 24px 28px;
  gap: 16px;
}

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

.mobile-nav-drawer .nav-link {
  font-size: 1.05rem;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
}

/* 页面通用章节排版 */
.section-wrap {
  padding: 72px 0;
  position: relative;
}

.section-wrap-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

/* 编辑式非对称章节头部 */
.editorial-header {
  margin-bottom: 48px;
  position: relative;
}

.editorial-num {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 300;
  color: var(--border-color);
  line-height: 1;
  margin-bottom: 4px;
  display: block;
  user-select: none;
}

.editorial-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.editorial-title {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.editorial-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin-top: 14px;
  line-height: 1.8;
}

/* 横向极简分割线 */
.editorial-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 56px 0;
  border: none;
}

/* ===================================================================
   01 品牌介绍（Brand Hero）
   =================================================================== */
.brand-hero {
  padding: 80px 0 60px;
  position: relative;
}

.hero-editorial-layout {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-main-title {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero-intro-text {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.95;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-side-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.hero-side-card::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 10px;
  right: -10px;
  bottom: -10px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  z-index: -1;
}

.hero-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  background-color: var(--bg-accent-soft);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.hero-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 20px 0;
}

.hero-spec-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
}

.hero-spec-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ===================================================================
   02 订阅前须知（Pre-subscription Notices）
   =================================================================== */
.notice-editorial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.notice-item-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}

.notice-icon-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.notice-icon-box {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  color: var(--btn-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.notice-item-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-title);
}

.notice-item-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.8;
}

/* ===================================================================
   03 套餐价格（纵向套餐信息列表，简洁纯粹）
   =================================================================== */
.plans-vertical-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.plan-vertical-row {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  align-items: center;
  gap: 24px;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
}

.plan-vertical-row:hover {
  border-color: var(--btn-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.plan-name-area {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.plan-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-name-text {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-title);
}

.plan-tag-pill {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background-color: var(--bg-tag);
  color: var(--text-title);
  font-weight: 600;
}

.plan-tag-featured {
  background-color: rgba(199, 107, 80, 0.12);
  color: var(--btn-primary);
}

.plan-desc-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.plan-price-area {
  display: flex;
  flex-direction: column;
}

.plan-price-large {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--btn-primary);
  line-height: 1;
}

.plan-price-currency {
  font-size: 1.2rem;
  margin-right: 2px;
}

.plan-price-cycle {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.plan-cycle-detail {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.plan-data-meta-area {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-body);
}

.plan-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-meta-label {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.plan-action-area {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.plan-verify-note {
  font-size: 0.76rem;
  color: var(--color-accent-dark);
  display: flex;
  align-items: center;
  gap: 4px;
}

.pricing-clarification-box {
  margin-top: 32px;
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 18px 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===================================================================
   04 新手使用步骤（时间轴形式）
   =================================================================== */
.timeline-editorial-wrap {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline-editorial-wrap::before {
  content: "";
  position: absolute;
  top: 15px;
  bottom: 15px;
  left: 15px;
  width: 2px;
  background-color: var(--border-color);
}

.timeline-step-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-step-item:last-child {
  margin-bottom: 0;
}

.timeline-step-node {
  position: absolute;
  left: -40px;
  top: 4px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 2px solid var(--btn-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--btn-primary);
  box-shadow: 0 0 0 4px var(--bg-primary);
}

.timeline-step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
}

.timeline-step-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

.timeline-step-text {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.8;
}

.timeline-step-tip {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--border-color);
  font-size: 0.85rem;
  color: var(--color-accent-dark);
}

/* ===================================================================
   05 设备使用指南（Windows, Android, iOS, macOS）
   =================================================================== */
.devices-editorial-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.device-col-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.device-col-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.device-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.device-icon-box {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-title);
}

.device-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-title);
}

.device-client-pill {
  font-size: 0.8rem;
  color: var(--btn-primary);
  font-weight: 600;
  margin-bottom: 10px;
}

.device-desc {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 16px;
}

.device-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.device-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

/* ===================================================================
   06 瞬云专题文章（杂志式分栏导读）
   =================================================================== */
.articles-magazine-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.magazine-article-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.magazine-article-item:hover {
  border-color: var(--btn-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.magazine-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.magazine-index-num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
}

.magazine-read-time {
  background-color: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.magazine-article-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.45;
  margin-bottom: 12px;
}

.magazine-article-title a {
  color: inherit;
}

.magazine-article-title a:hover {
  color: var(--btn-primary);
}

.magazine-article-excerpt {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 20px;
  flex-grow: 1;
}

.magazine-read-more-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--btn-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.magazine-read-more-link:hover {
  text-decoration: underline;
}

/* ===================================================================
   07 常见问题（独立文字问答，默认展开）
   =================================================================== */
.faq-editorial-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-editorial-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 32px;
  box-shadow: var(--shadow-sm);
}

.faq-question-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.faq-q-badge {
  font-family: var(--font-serif);
  color: var(--btn-primary);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

.faq-answer-body {
  font-size: 0.96rem;
  color: var(--text-body);
  line-height: 1.85;
  padding-left: 28px;
}

/* ===================================================================
   08 页脚（品牌说明、导航、隐私、推广披露、联系入口）
   =================================================================== */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 36px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-top-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 12px;
}

.footer-brand-intro {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.8;
  max-width: 380px;
}

.footer-col-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 18px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
}

.footer-nav-list a {
  color: var(--text-body);
  font-size: 0.88rem;
}

.footer-nav-list a:hover {
  color: var(--btn-primary);
}

.footer-disclosure-block {
  padding: 28px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.footer-disclosure-title {
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 6px;
}

.footer-bottom-row {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
}

.footer-friendly-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-friendly-links a {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-friendly-links a:hover {
  color: var(--text-title);
}

/* ===================================================================
   文章内页独立杂志式布局 (Article Single Template)
   =================================================================== */
.article-reading-wrap {
  padding: 50px 0 80px;
}

.breadcrumb-editorial {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.breadcrumb-sep {
  color: var(--border-color);
}

.article-main-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 52px;
  align-items: start;
}

.article-content-paper {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 48px 56px;
  box-shadow: var(--shadow-sm);
}

.article-single-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
}

.article-category-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--bg-accent-soft);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.article-single-title {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.35;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.article-meta-info-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-lead-box {
  background-color: var(--bg-secondary);
  border-left: 3px solid var(--color-accent);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 36px;
  font-size: 1.02rem;
  color: var(--text-body);
  line-height: 1.85;
}

.article-body-text {
  font-size: 1.04rem;
  color: var(--text-body);
  line-height: 2;
}

.article-body-text p {
  margin-bottom: 24px;
}

.article-body-text h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-title);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  line-height: 1.35;
}

.article-body-text h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-title);
  margin: 28px 0 12px;
  line-height: 1.4;
}

.article-body-text ul, .article-body-text ol {
  margin: 16px 0 24px 24px;
  line-height: 1.9;
}

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

.article-callout {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
}

.article-callout-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 8px;
}

/* 侧边栏与目录 (TOC) */
.article-sticky-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-toc-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-link {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: block;
}

.toc-link:hover {
  color: var(--btn-primary);
}

.sidebar-promo-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
}

.sidebar-promo-card h4 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--text-title);
  margin-bottom: 8px;
}

.sidebar-promo-card p {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
}

/* 上下篇与相关推荐 */
.article-nav-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.pager-box {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pager-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.pager-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.4;
}

.article-affiliate-cta {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 40px;
  text-align: center;
}

.article-affiliate-cta h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--text-title);
  margin-bottom: 10px;
}

.article-affiliate-cta p {
  font-size: 0.92rem;
  color: var(--text-body);
  max-width: 600px;
  margin: 0 auto 20px;
  line-height: 1.7;
}

/* 返回顶部 */
.back-to-top-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 24px;
  cursor: pointer;
}

.back-to-top-btn:hover {
  color: var(--btn-primary);
}

/* ===================================================================
   响应式断点适配（360px 手机、768px 平板、1440px 桌面）
   =================================================================== */
@media (max-width: 1024px) {
  .hero-editorial-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .devices-editorial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-main-grid {
    grid-template-columns: 1fr;
  }
  .article-sticky-sidebar {
    display: none; /* 移动与中等屏幕隐藏右侧固定悬浮目录，提升阅读纯粹性 */
  }
  .plan-vertical-row {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .plan-action-area {
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  .nav-desktop, .header-action {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .section-wrap {
    padding: 52px 0;
  }
  .editorial-title {
    font-size: 1.75rem;
  }
  .hero-main-title {
    font-size: 1.95rem;
  }
  .notice-editorial-grid {
    grid-template-columns: 1fr;
  }
  .articles-magazine-grid {
    grid-template-columns: 1fr;
  }
  .devices-editorial-grid {
    grid-template-columns: 1fr;
  }
  .plan-vertical-row {
    grid-template-columns: 1fr;
    padding: 24px 20px;
  }
  .footer-top-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .article-content-paper {
    padding: 30px 20px;
  }
  .article-single-title {
    font-size: 1.7rem;
  }
  .article-nav-pager {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 380px) {
  .container {
    padding: 0 16px;
  }
  .hero-main-title {
    font-size: 1.75rem;
  }
  .editorial-title {
    font-size: 1.55rem;
  }
}