/* ==========================================================================
   悠兔机场官网 (youtu-jichang.cyou) - 官网样式表
   视觉风格：T04 暖白墨绿 | 背景风格：B04 暖白极简 | 品牌配色：C06 深海墨绿 × 琥珀金
   排版结构：L05 上下双层 | 字体风格：F15 圆润亲和 | 卡片：K08 悬浮信息卡
   ========================================================================== */

:root {
  --primary: #1B493A;
  --primary-hover: #13382C;
  --primary-light: #2D6A4F;
  --primary-subtle: #EBF2EE;
  --accent-amber: #E09F3E;
  --accent-amber-hover: #C9882B;
  --accent-amber-light: #FEF6EB;
  --bg-page: #FBFBFA;
  --bg-surface: #FFFFFF;
  --bg-alt: #F4F7F5;
  --card-border: #E1EBE5;
  --text-main: #17241E;
  --text-body: #405249;
  --text-muted: #6B7E74;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 4px 12px rgba(27, 73, 58, 0.05);
  --shadow-md: 0 10px 28px rgba(27, 73, 58, 0.08);
  --shadow-hover: 0 16px 36px rgba(27, 73, 58, 0.12);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

button, input {
  font: inherit;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 标题规范 - 圆润亲和 */
h1, h2, h3, h4 {
  color: var(--text-main);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-subtle);
  border: 1px solid rgba(27, 73, 58, 0.15);
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.02rem;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  font-size: 0.96rem;
}

.btn-primary {
  background-color: var(--accent-amber);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(224, 159, 62, 0.35);
}

.btn-primary:hover {
  background-color: var(--accent-amber-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 159, 62, 0.45);
}

.btn-secondary {
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(27, 73, 58, 0.25);
}

.btn-secondary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: #FFFFFF;
  color: var(--primary);
  border-color: var(--card-border);
}

.btn-outline:hover {
  background-color: var(--primary-subtle);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* 顶部导航 - N02 极简留白导航（墨绿与琥珀点缀） */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(251, 251, 250, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  padding: 14px 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 导航区注册按钮专用配色：深绿色按钮 */
.site-header .btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(27, 73, 58, 0.25);
  font-weight: 600;
}
.site-header .btn-primary:hover {
  background-color: var(--primary-light);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(27, 73, 58, 0.35);
}

/* 品牌只显示：兔子Logo + 悠兔 */
.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  flex-shrink: 0;
}

.brand-text {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.nav-link {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--text-main);
  padding: 6px 0;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--accent-amber);
  border-radius: var(--radius-pill);
  transition: width 0.25s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-trigger-btn {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.search-trigger-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--primary);
}

/* Hero 区域 - L05 上下双层布局（青绿山水与奔跑白兔） */
.hero-section {
  padding: 60px 0 50px;
  position: relative;
  background-color: #F0F9FF;
  background-image: linear-gradient(90deg, #F0F9FF 0%, #F0F9FF 32%, rgba(240, 249, 255, 0.45) 48%, rgba(240, 249, 255, 0) 65%), url('../assets/visual/youtu_jichang_cyou background image.jpg');
  background-repeat: no-repeat;
  background-position: right center;
  background-size: cover;
  overflow: hidden;
}

.hero-container {
  display: flex;
  flex-direction: column;
}

.hero-main-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 460px;
}

.hero-content {
  max-width: 550px;
  margin: 0;
  text-align: left;
  position: relative;
  z-index: 2;
}

.badge-rabbit-accent {
  vertical-align: middle;
  margin-right: 6px;
  display: inline-block;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.25;
  margin-bottom: 20px;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.hero-title-brand {
  display: inline-block;
  white-space: nowrap;
}

.hero-title-brand::after {
  content: " ｜ ";
  color: #D1D5DB;
  font-weight: 300;
  margin: 0 4px;
}

.hero-title-sub {
  color: var(--primary);
  display: inline-block;
}

.hero-desc {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 34px;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.hero-mobile-visual {
  display: none;
}

/* Hero 下层：四端快捷设备卡片 */
.hero-devices-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1000px;
  margin: 16px auto 0;
  width: 100%;
}

.device-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  display: block;
}

.device-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}

.device-icon-wrap {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 12px;
  background-color: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.device-card:hover .device-icon-wrap {
  background-color: var(--primary);
  color: #FFFFFF;
}

.device-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.device-sub {
  font-size: 0.82rem;
  color: var(--accent-amber);
  font-weight: 600;
}

/* 四步极速上手流 - 导入 section-bg-01 背景 */
.steps-section {
  padding: 85px 0;
  position: relative;
  background-color: #FBFBFA;
  background-image: url('../assets/visual/section-bg-01.webp');
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  background: var(--accent-amber);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(224, 159, 62, 0.35);
}

.step-title {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--primary);
}

.step-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 核心特性与客户端支持 */
.client-support-section {
  padding: 80px 0;
  background-color: var(--bg-alt);
}

/* 平台流媒体与生产力工具兼容徽章条 */
/* 服务兼容专区 - 包含完整7大平台展示与用途说明 */
.service-compat-block {
  margin-top: 48px;
  padding: 36px 30px;
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.compat-header {
  margin-bottom: 24px;
}

.compat-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 8px;
}

.compat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
}

.compat-card {
  background: #F8FCF9;
  border: 1px solid rgba(36, 126, 104, 0.15);
  border-radius: var(--radius-md);
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.compat-card:hover {
  border-color: var(--primary);
  background: #FFFFFF;
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(36, 126, 104, 0.12);
}

.compat-logo-img {
  height: 30px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  margin-bottom: 10px;
  display: block;
}

.compat-desc {
  font-size: 0.82rem;
  color: #4B5563;
  font-weight: 500;
  line-height: 1.4;
}

.compat-footer-note {
  margin-top: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  background: #F0FDF4;
  border: 1px solid rgba(36, 126, 104, 0.2);
  border-radius: var(--radius-full);
  color: #166534;
  font-size: 0.88rem;
}

.compat-footer-note p {
  margin: 0;
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.client-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.client-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.client-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.client-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.client-title {
  font-size: 1.25rem;
}

.client-features-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-body);
  margin-bottom: 10px;
}

.client-features-list svg {
  color: var(--primary-light);
  flex-shrink: 0;
}

/* 套餐分层展示区 - 导入 section-bg-02 背景（展示悠兔官方真实核实套餐） */
.pricing-section {
  padding: 90px 0;
  position: relative;
  background-color: #F4F7F5;
  background-image: url('../assets/visual/section-bg-02.webp');
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
}

.pricing-notice {
  text-align: center;
  margin-bottom: 40px;
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--accent-amber-light);
  border: 1px dashed var(--accent-amber);
  display: inline-block;
  padding: 8px 24px;
  border-radius: var(--radius-pill);
}

.pricing-notice-wrap {
  text-align: center;
}

.pricing-tiers-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
}

.tier-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 28px 34px;
  display: grid;
  grid-template-columns: 240px 1fr 200px;
  align-items: center;
  gap: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.tier-card.featured {
  border: 2px solid var(--primary);
  background: #FFFFFF;
  box-shadow: var(--shadow-md);
}

.tier-badge {
  position: absolute;
  top: -12px;
  left: 34px;
  background-color: var(--accent-amber);
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 14px;
  border-radius: var(--radius-pill);
}

.tier-info-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 2px;
}

.tier-price-row {
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin: 6px 0 6px;
}

.tier-currency {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-amber);
}

.tier-price-num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.tier-period {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.tier-info-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tier-specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.tier-spec-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-body);
}

.tier-spec-row svg {
  color: var(--primary);
  flex-shrink: 0;
}

.tier-cta-col {
  text-align: right;
}

/* 用户反馈模块（严格执行最新模拟评价规范） */
.testimonials-section {
  padding: 80px 0;
  background-color: var(--bg-alt);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.card-sample-tag {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.stars-row {
  color: var(--accent-amber);
  font-size: 1.05rem;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.testimonial-text {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-body);
  margin-bottom: 16px;
}

.testimonial-meta {
  border-top: 1px dashed var(--card-border);
  padding-top: 12px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* FAQ 问答专区 - 双列卡片式 */
.faq-section {
  padding: 80px 0;
}

.faq-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.faq-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.faq-card-q {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.faq-q-badge {
  background: var(--accent-amber);
  color: #FFFFFF;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.faq-card-a {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.75;
  padding-left: 34px;
}

/* 科普文章预览网格 */
.articles-preview-section {
  padding: 80px 0;
  background-color: var(--bg-alt);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.article-tag {
  background: var(--primary-subtle);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.article-title {
  font-size: 1.18rem;
  margin: 12px 0 8px;
  line-height: 1.45;
}

.article-card:hover .article-title {
  color: var(--primary);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-link {
  color: var(--accent-amber);
  font-weight: 700;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  color: var(--accent-amber-hover);
  gap: 10px;
}

/* 转化横幅 - 导入 cta-banner.png 背景 */
.cta-banner-section {
  padding: 60px 0;
}

.cta-banner-box {
  background-color: var(--primary);
  background-image: linear-gradient(135deg, rgba(27, 73, 58, 0.9), rgba(18, 52, 41, 0.94)), url('../assets/visual/cta-banner.webp');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  color: #FFFFFF;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(224, 159, 62, 0.25);
  position: relative;
  overflow: hidden;
}

.cta-banner-title {
  color: #FFFFFF;
  font-size: 2.3rem;
  margin-bottom: 14px;
}

.cta-banner-desc {
  max-width: 680px;
  margin: 0 auto 30px;
  font-size: 1.1rem;
  opacity: 0.9;
}

/* 页脚 - 4个固定独立入口规范 */
.site-footer {
  background-color: #F2F5F3;
  border-top: 1px solid var(--card-border);
  padding: 60px 0 30px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .brand-text {
  margin-bottom: 12px;
}

.footer-desc {
  max-width: 420px;
  line-height: 1.7;
}

.footer-col-title {
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(27, 73, 58, 0.12);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-slogan {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

.footer-disclaimer {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 详情页专用排版 */
.page-header {
  padding: 50px 0 30px;
  text-align: center;
  background-color: var(--bg-alt);
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 40px;
}

.page-title {
  font-size: 2.3rem;
  margin-bottom: 12px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.article-content-container {
  max-width: 840px;
  margin: 0 auto 60px;
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 46px;
  box-shadow: var(--shadow-sm);
}

.article-content {
  font-size: 1.04rem;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.6rem;
  color: var(--primary);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-subtle);
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

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

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

.article-content blockquote {
  border-left: 4px solid var(--accent-amber);
  background-color: var(--accent-amber-light);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-nav-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--card-border);
  padding-top: 24px;
  margin-top: 36px;
}

/* 搜索模态框 */
.search-modal {
  position: fixed;
  inset: 0;
  background: rgba(23, 36, 30, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 100px;
  padding-left: 20px;
  padding-right: 20px;
}

.search-modal.active {
  display: flex;
}

.search-box {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 640px;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--card-border);
  overflow: hidden;
}

.search-header {
  display: flex;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--card-border);
  gap: 12px;
}

.search-input {
  flex-grow: 1;
  border: none;
  outline: none;
  font-size: 1.1rem;
  color: var(--text-main);
  background: transparent;
}

.search-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.4rem;
  padding: 4px;
}

.search-results-list {
  max-height: 380px;
  overflow-y: auto;
  padding: 12px;
}

.search-item {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  margin-bottom: 6px;
}

.search-item:hover {
  background-color: var(--primary-subtle);
}

.search-item-title {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.search-item-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .hero-devices-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .client-grid {
    grid-template-columns: 1fr;
  }
  .tier-card {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .tier-cta-col {
    text-align: left;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 10px 0;
  }
  .brand-logo-img {
    width: 34px;
    height: 34px;
  }
  .brand-text {
    font-size: 1.35rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .nav-actions {
    gap: 8px;
    flex-shrink: 0;
  }
  /* 移动端保留紧凑注册按钮，全站唯一注册入口 */
  .nav-actions .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: 6px;
    white-space: nowrap;
    line-height: 1.2;
  }
  .search-trigger-btn {
    padding: 8px;
    width: 40px;
    height: 40px;
    justify-content: center;
    border-radius: 50%;
  }
  .search-trigger-btn span {
    display: none;
  }
  .hero-section {
    padding: 40px 0 30px;
    background-image: none;
    text-align: center;
  }
  .hero-main-row {
    flex-direction: column;
    min-height: auto;
  }
  .hero-content {
    max-width: 100%;
    text-align: center;
    margin: 0 auto;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.35;
    word-break: keep-all;
    overflow-wrap: break-word;
  }
  .hero-desc {
    font-size: 1rem;
    margin-left: auto;
    margin-right: auto;
  }
  .hero-buttons {
    justify-content: center;
    margin-bottom: 20px;
  }
  .hero-mobile-visual {
    display: block;
    width: 100%;
    margin: 8px 0 24px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(27, 73, 58, 0.12);
    border: 1px solid rgba(27, 73, 58, 0.16);
    background-color: #FBFBFA;
  }
  .hero-mobile-art {
    width: 100%;
    height: 260px;
    object-fit: cover;
    object-position: right center;
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #FBFBFA;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
    gap: 16px;
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-menu-cta {
    display: none !important;
  }
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
  }
  .hero-devices-row {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 14px;
  }
  .platform-logos-bar {
    gap: 14px 20px;
    padding: 16px;
  }
  .platform-logo-item {
    font-size: 0.85rem;
  }
  .platform-logo-img {
    height: 20px;
    max-width: 75px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .faq-cards-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .article-content-container {
    padding: 26px 20px;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 1.72rem;
  }
  .hero-devices-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .hero-buttons .btn {
    width: 100%;
  }
}

@media (max-width: 360px) {
  .brand-text {
    font-size: 1.15rem;
  }
  .brand-logo-img {
    width: 28px;
    height: 28px;
  }
  .nav-actions {
    gap: 4px;
  }
  .nav-actions .btn {
    padding: 5px 8px;
    font-size: 0.78rem;
  }
  .search-trigger-btn {
    width: 34px;
    height: 34px;
  }
  .mobile-toggle {
    width: 34px;
    height: 34px;
  }
  .hero-title {
    font-size: 1.55rem;
  }
}