/* ===================================================================
   白月光 (BYG Cloud) - 官方推广落地页极简样式表 (高雅纯净浅色主题)
   特性：清爽高级浅色质感、零第三方依赖、原生现代CSS、极速秒开、全端自适应响应式
   =================================================================== */

:root {
  /* 基础浅色基调与月光纯净色彩系统 */
  --bg-main: #f8fafc;           /* 极清雅柔和的冷白偏slate底色 */
  --bg-card: #ffffff;           /* 纯白卡片底色 */
  --bg-card-hover: #ffffff;
  --bg-card-light: #f1f5f9;      /* 次级浅灰背景 */
  --border-color: #e2e8f0;       /* 浅色精致描边 */
  --border-focus: rgba(2, 132, 199, 0.45);
  
  /* 品牌高饱和对比主色 (浅色模式下保证 WCAG 4.5:1 可读性) */
  --primary: #0284c7;           /* 月光天青蓝 */
  --primary-hover: #0369a1;     /* 深天青蓝 */
  --accent-purple: #7c3aed;     /* 科技紫 */
  --accent-pink: #db2777;
  --accent-green: #059669;      /* 高速/在线指示绿 */
  
  /* 文字层级对比系统 */
  --text-main: #0f172a;         /* 深黛灰/黑曜石色，极佳字迹辨识度 */
  --text-sub: #475569;          /* 次级正文石板灰 */
  --text-muted: #64748b;        /* 辅助说明暗灰 */

  /* 渐变与阴影体系 */
  --gradient-moon: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #9333ea 100%);
  --gradient-btn: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #7c3aed 100%);
  --gradient-btn-hover: linear-gradient(135deg, #0369a1 0%, #1d4ed8 50%, #6d28d9 100%);
  --glow-shadow: 0 12px 36px -4px rgba(2, 132, 199, 0.12);
  --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
  --card-shadow-hover: 0 14px 34px -4px rgba(15, 23, 42, 0.1), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-main);
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  background-color: var(--bg-main);
  color: var(--text-main);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 渐变与浅色环境光晕装饰 */
.bg-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
  z-index: 0;
}
.glow-top-left {
  top: -120px;
  left: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.2) 0%, rgba(248, 250, 252, 0) 70%);
}
.glow-top-right {
  top: 60px;
  right: -80px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.14) 0%, rgba(248, 250, 252, 0) 70%);
}

/* 浅色通透磨砂导航栏 */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.brand-logo .logo-icon {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-moon);
  border-radius: 10px;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

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

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-sub);
  font-weight: 600;
}

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

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

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: none;
  outline: none;
  white-space: nowrap;
  transition: all 0.25s ease;
  text-align: center;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 22px rgba(2, 132, 199, 0.4);
  transform: translateY(-2px);
  color: #ffffff !important;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
}

/* 主视觉区 (Hero Section) */
.hero-section {
  position: relative;
  padding: 84px 0 64px;
  text-align: center;
  overflow: hidden;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  color: #0369a1;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-main);
}

.hero-title .gradient-text {
  background: var(--gradient-moon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-sub);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  max-width: 900px;
  margin: 0 auto;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-sub);
}

.trust-item svg {
  color: var(--accent-green);
}

/* 主视觉氛围美图展示 (Hero Image Showcase) */
.hero-image-showcase {
  max-width: 960px;
  margin: 0 auto 40px;
  padding: 8px;
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 24px;
  box-shadow: 0 20px 45px -15px rgba(15, 23, 42, 0.1), 0 0 0 1px rgba(226, 232, 240, 0.7);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-image-showcase:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 55px -15px rgba(15, 23, 42, 0.14), 0 0 0 1px rgba(56, 189, 248, 0.4);
}

.hero-image-inner {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: #0f172a;
  line-height: 0;
}

.hero-showcase-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.hero-image-overlay-badge {
  position: absolute;
  bottom: 18px;
  left: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-pill);
  color: #f8fafc;
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1;
}

.hero-image-overlay-badge .badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
}

/* 核心特性卡片 (Features) */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background-color: #f1f5f9;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}

.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.feature-card:hover {
  background: #ffffff;
  border-color: var(--border-focus);
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #e0f2fe;
  color: var(--primary);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-desc {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* 流媒体与 AI 支持专区 */
.unlock-showcase {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--card-shadow);
}

.unlock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.unlock-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.unlock-box-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.unlock-icon-circle {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ede9fe;
  color: var(--accent-purple);
}

.unlock-icon-circle.blue {
  background: #e0f2fe;
  color: var(--primary);
}

.unlock-box-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.unlock-box-desc {
  color: var(--text-sub);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.badge-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  transition: all 0.2s ease;
}

.badge-item:hover {
  background: #e0f2fe;
  border-color: #7dd3fc;
  color: var(--primary);
}

/* 价格套餐对比表 (Pricing) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--card-shadow);
}

.pricing-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-8px);
  box-shadow: var(--card-shadow-hover);
}

.pricing-card.featured {
  background: #ffffff;
  border: 2px solid var(--primary);
  box-shadow: 0 10px 30px rgba(2, 132, 199, 0.15);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 16px 36px rgba(2, 132, 199, 0.22);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-moon);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-sub);
  min-height: 40px;
  margin-bottom: 20px;
}

.plan-price-wrap {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.plan-currency {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary);
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

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

.plan-features {
  flex-grow: 1;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-sub);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.4;
}

.plan-features li strong {
  color: var(--text-main);
}

.plan-features li svg {
  flex-shrink: 0;
  color: var(--accent-green);
  margin-top: 2px;
}

/* 用户评价 (Testimonials) */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: 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;
  transition: all 0.3s ease;
  box-shadow: var(--card-shadow);
}

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

.rating-stars {
  color: #f59e0b;
  margin-bottom: 16px;
  display: flex;
  gap: 4px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  background: var(--gradient-moon);
  color: #ffffff;
}

.user-meta-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

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

/* 常见问题解答 (FAQ) - 原生 details/summary，无需外部JS秒开 */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.faq-item[open] {
  border-color: var(--border-focus);
  box-shadow: var(--card-shadow);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  color: var(--text-main);
}

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

.faq-arrow {
  transition: transform 0.25s ease;
  color: var(--primary);
  flex-shrink: 0;
}

.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

/* 底部 CTA 转化条 */
.bottom-cta-banner {
  margin-top: 40px;
  background: linear-gradient(135deg, #e0f2fe 0%, #ede9fe 100%);
  border: 1px solid #bae6fd;
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.bottom-cta-title {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.bottom-cta-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 规范页脚 (Footer) - 严格只保留四个标题 */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #ffffff;
  padding: 40px 0 30px;
}

.footer-links-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link-item {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-sub);
  position: relative;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.footer-link-item:hover {
  color: var(--primary);
  background: #e0f2fe;
}

.footer-bottom-copy {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

/* 独立政策/信息内容页样式 (about, terms, privacy, sitemap) */
.page-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 100%);
}

.content-article {
  padding: 50px 0 80px;
  max-width: 880px;
  margin: 0 auto;
}

.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--card-shadow);
  margin-bottom: 32px;
}

.content-card h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.content-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-main);
}

.content-card p {
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-card ul {
  margin-bottom: 20px;
  padding-left: 20px;
}

.content-card ul li {
  list-style-type: disc;
  color: var(--text-sub);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 8px;
}

.badge-alert {
  background: #fef2f2;
  border-left: 4px solid #ef4444;
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  color: #991b1b;
  font-size: 0.95rem;
}

.badge-success {
  background: #ecfdf5;
  border-left: 4px solid var(--accent-green);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  color: #065f46;
  font-size: 0.95rem;
}

/* ===================================================================
   响应式媒体查询适配 (@media) - 确保手机端完美单栏与手指触摸点击
   =================================================================== */

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* 导航栏自适应 */
  .header-nav {
    padding: 12px 0;
  }
  .nav-links {
    display: none; /* 移动端精简无冗余，保留核心CTA */
  }
  .brand-logo {
    font-size: 1.15rem;
  }

  /* 主视觉手机端优化 */
  .hero-section {
    padding: 50px 0 40px;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.25;
  }
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px; /* 适合手指点击 */
  }
  .hero-trust-bar {
    gap: 16px;
    flex-direction: column;
    align-items: flex-start;
    padding-left: 10px;
  }

  .hero-image-showcase {
    margin: 0 auto 30px;
    padding: 5px;
    border-radius: 16px;
  }
  .hero-image-inner {
    border-radius: 12px;
  }
  .hero-image-overlay-badge {
    bottom: 10px;
    left: 10px;
    font-size: 0.75rem;
    padding: 6px 12px;
  }

  /* 栅格全改为单栏展示 */
  .grid-3, .grid-2, .grid-4, .pricing-grid, .testimonial-grid, .unlock-grid {
    grid-template-columns: 1fr !important;
    gap: 18px;
  }

  .unlock-showcase {
    padding: 24px 18px;
  }
  .unlock-box {
    padding: 22px 16px;
  }

  /* 价格卡片手机端单栏 */
  .pricing-card {
    padding: 28px 20px;
  }
  .pricing-card .btn {
    width: 100%;
    min-height: 48px;
  }

  /* 内容卡片手机端适配 */
  .content-card {
    padding: 24px 18px;
  }
  .bottom-cta-banner {
    padding: 32px 20px;
  }
  .bottom-cta-banner .btn {
    width: 100%;
    min-height: 48px;
  }

  /* 页脚手机端单栏居中 */
  .footer-links-wrap {
    flex-direction: column;
    gap: 16px;
  }
  .footer-link-item {
    font-size: 1.1rem;
    display: block;
    width: 100%;
    text-align: center;
    padding: 10px;
    background: #f1f5f9;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .btn-lg {
    padding: 14px 20px;
    font-size: 1rem;
  }
}

/* ===================================================================
   高科技网格卡片 (Tech Grid Cards) & SEO 独立文章页面样式
   =================================================================== */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 32px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-moon);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.article-card:hover::before {
  opacity: 1;
}

.article-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 0.82rem;
}

.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #e0f2fe;
  color: var(--primary);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
}

.article-badge.special {
  background: #ede9fe;
  color: var(--accent-purple);
}

.article-date {
  color: var(--text-muted);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-main);
  transition: color 0.2s ease;
}

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

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  font-size: 0.88rem;
  color: var(--primary);
  font-weight: 600;
}

.article-card-footer svg {
  transition: transform 0.2s ease;
}

.article-card:hover .article-card-footer svg {
  transform: translateX(4px);
}

/* 独立文章正文页 */
.article-detail-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 0 80px;
}

.article-top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 18px;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e2e8f0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 12px;
}

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

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

.article-body li {
  margin-bottom: 10px;
  list-style-type: disc;
}

.article-body strong {
  color: var(--text-main);
}

.article-link-highlight {
  color: var(--primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 2px 6px;
  border-radius: 4px;
  background: #f0f9ff;
  border: 1px solid #bae6fd;
}

.article-link-highlight:hover {
  color: #0369a1;
  background: #e0f2fe;
}

.article-quote-box {
  background: #f8fafc;
  border-left: 4px solid var(--primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--text-sub);
  font-size: 0.98rem;
}

.article-pbn-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 32px 0;
}

.article-pbn-box h4 {
  font-size: 1.05rem;
  color: #166534;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-pbn-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.article-pbn-link {
  color: #15803d;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-pbn-link:hover {
  color: #166534;
}

@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .articles-grid {
    grid-template-columns: 1fr !important;
  }
}