/* ==========================================================================
   大哥云 (DAGEYUN) - 港式古惑仔风格原生主样式表 (浅色优雅版 Light Theme)
   特色：极速秒开、纯原生CSS、浅色高对比度、极致响应式、高科技网格卡片
   ========================================================================== */

/* --- 全局变量定义 (浅色主题 Light Theme) --- */
:root {
  --bg-main: #f4f6fa;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-darker: #0f172a; /* 页脚深色高对比 */

  --neon-red: #d90429;
  --neon-red-glow: rgba(217, 4, 41, 0.25);
  --neon-gold: #d97706;
  --neon-gold-glow: rgba(217, 119, 6, 0.25);
  --neon-cyan: #0284c7;
  --neon-cyan-glow: rgba(2, 132, 199, 0.2);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --border-color: rgba(15, 23, 42, 0.1);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* --- 重置与基础设置 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* --- 容器布局 --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- 文本与辅助样式 --- */
.text-gradient-red {
  background: linear-gradient(135deg, #d90429 0%, #ef233c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-gold {
  background: linear-gradient(135deg, #b45309 0%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.neon-text-red {
  color: var(--neon-red);
  font-weight: 900;
}

.neon-text-gold {
  color: var(--neon-gold);
  font-weight: 800;
}

.neon-border {
  border: 1px solid var(--neon-red);
  box-shadow: 0 4px 15px var(--neon-red-glow);
}

/* --- 按钮系统 (CTA Button) --- */
.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.cta-btn-primary {
  background: linear-gradient(135deg, #d90429 0%, #b80020 100%);
  color: #ffffff;
  border: 1px solid #ef233c;
  box-shadow: 0 4px 15px rgba(217, 4, 41, 0.3);
}

.cta-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(217, 4, 41, 0.45);
  background: linear-gradient(135deg, #ef233c 0%, #d90429 100%);
}

.cta-btn-gold {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  color: #ffffff;
  border: 1px solid #f59e0b;
  box-shadow: 0 4px 15px rgba(217, 119, 6, 0.3);
}

.cta-btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(217, 119, 6, 0.45);
}

.cta-btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid #cbd5e1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.cta-btn-secondary:hover {
  background: #f8fafc;
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 4px 15px var(--neon-cyan-glow);
}

.cta-btn-block {
  width: 100%;
}

/* --- 顶部导航 Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-tag {
  font-size: 0.75rem;
  background: var(--neon-red);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0;
}

.nav-menu {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--neon-red);
}

/* --- 英雄区 Hero Section --- */
.hero-section {
  padding: 90px 0 70px;
  position: relative;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(217, 4, 41, 0.06) 0%, rgba(244, 246, 250, 0) 70%);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(217, 4, 41, 0.08);
  border: 1px solid rgba(217, 4, 41, 0.25);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.9rem;
  color: var(--neon-red);
  margin-bottom: 24px;
  font-weight: 700;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 24px;
  letter-spacing: -1px;
  color: #0f172a;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 40px;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: center;
  margin-bottom: 60px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.stat-item h3 {
  font-size: 2.1rem;
  color: var(--neon-red);
  font-weight: 900;
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-weight: 600;
}

/* --- 通用 Section 标头 --- */
.section-padding {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-tag {
  color: var(--neon-red);
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: #0f172a;
}

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

/* --- 高科技网格卡片布局 (High-Tech Grid Cards Layout) --- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.tech-card {
  background: #ffffff;
  border: 1px solid rgba(15, 23, 42, 0.09);
  border-radius: 14px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
}

.tech-card:hover {
  transform: translateY(-6px);
  border-color: var(--neon-red);
  box-shadow: 0 12px 30px rgba(217, 4, 41, 0.12);
}

.tech-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.tech-card-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--neon-red);
  background: rgba(217, 4, 41, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(217, 4, 41, 0.2);
}

.tech-card-date {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.tech-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.4;
  margin-bottom: 14px;
  transition: var(--transition);
}

.tech-card:hover .tech-card-title {
  color: var(--neon-red);
}

.tech-card-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}

.tech-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed rgba(0, 0, 0, 0.08);
  padding-top: 16px;
}

.tech-card-link {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--neon-red);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.tech-card-link:hover {
  color: #b80020;
  transform: translateX(4px);
}

/* --- SEO 文章排版样式 --- */
.article-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 50px;
  max-width: 920px;
  margin: 0 auto 60px;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.04);
}

.article-header-meta {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.article-main-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: #0f172a;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-sub-info {
  display: flex;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--neon-red);
  margin: 32px 0 16px;
  border-left: 4px solid var(--neon-red);
  padding-left: 12px;
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  margin: 24px 0 12px;
}

.article-content p {
  color: #334155;
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 20px;
  text-align: justify;
}

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

.article-content li {
  color: #334155;
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 10px;
}

.article-seo-box {
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  padding: 24px;
  margin: 32px 0;
}

.article-seo-box h4 {
  font-size: 1.1rem;
  color: var(--neon-gold);
  margin-bottom: 12px;
  font-weight: 800;
}

.article-seo-box p {
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.article-seo-box a {
  color: var(--neon-red);
  font-weight: 700;
  text-decoration: underline;
}

.return-consult-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  color: #ffffff;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(217, 119, 6, 0.3);
  transition: var(--transition);
  margin-top: 40px;
  text-transform: uppercase;
}

.return-consult-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(217, 119, 6, 0.45);
}

/* --- 核心优势 Core Advantages --- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.adv-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 36px 28px;
  border-radius: 14px;
  transition: var(--transition);
  position: relative;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.adv-card:hover {
  transform: translateY(-6px);
  border-color: var(--neon-red);
  box-shadow: 0 12px 30px rgba(217, 4, 41, 0.12);
}

.adv-icon {
  font-size: 2.8rem;
  margin-bottom: 20px;
  display: inline-block;
}

.adv-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #0f172a;
}

.adv-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- 流媒体与 AI 支持 --- */
.streaming-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 50px 40px;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.04);
}

.stream-category {
  margin-bottom: 40px;
}

.stream-category:last-child {
  margin-bottom: 0;
}

.category-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--neon-gold);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.tag-item {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: #1e293b;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.98rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.tag-item:hover {
  background: rgba(2, 132, 199, 0.08);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

/* --- 套餐价格对比 Pricing Section --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.price-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
}

.price-card.featured {
  background: linear-gradient(180deg, #fff5f7 0%, #ffffff 100%);
  border: 2px solid var(--neon-red);
  box-shadow: 0 10px 35px rgba(217, 4, 41, 0.18);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--neon-red);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 4px 10px rgba(217, 4, 41, 0.3);
}

.price-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #0f172a;
}

.price-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--neon-red);
  line-height: 1;
  margin-bottom: 6px;
}

.price-period {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.price-features {
  margin-bottom: 36px;
  flex-grow: 1;
}

.price-features li {
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 10px 0;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-features li::before {
  content: "✔";
  color: var(--neon-red);
  font-weight: bold;
}

/* --- 用户评价 Testimonials --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 30px;
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.review-content {
  font-size: 1rem;
  color: #1e293b;
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-red), var(--neon-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.author-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
}

.author-info p {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* --- 常见问题 FAQ --- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.faq-question {
  font-size: 1.15rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-question::before {
  content: "Q.";
  color: var(--neon-red);
  font-weight: 900;
}

.faq-answer {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* --- 页脚 Footer --- */
.site-footer {
  background-color: var(--bg-darker);
  color: #f8fafc;
  border-top: 1px solid #1e293b;
  padding: 50px 0;
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 1.05rem;
  font-weight: 700;
  color: #cbd5e1;
  transition: var(--transition);
  padding: 8px 12px;
}

.footer-nav a:hover {
  color: #ff4d6d;
}

.footer-copy {
  font-size: 0.85rem;
  color: #94a3b8;
}

/* --- 子页面通用模版样式 --- */
.page-hero {
  padding: 70px 0 40px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.08) 0%, rgba(244, 246, 250, 0) 70%);
}

.page-title {
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 14px;
}

.page-content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 50px;
  margin-bottom: 80px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.04);
}

.page-content-box h2 {
  font-size: 1.6rem;
  color: var(--neon-red);
  margin: 32px 0 16px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding-bottom: 8px;
}

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

.page-content-box p {
  color: #334155;
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

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

.page-content-box li {
  color: #334155;
  margin-bottom: 10px;
  list-style: disc;
}

/* ==========================================================================
   响应式媒体查询 Responsive (@media max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .site-header {
    padding: 12px 0;
  }

  .header-inner {
    flex-direction: column;
    gap: 14px;
  }

  .nav-menu {
    gap: 16px;
    font-size: 0.9rem;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-section {
    padding: 50px 0 40px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .cta-btn {
    width: 100%;
    min-height: 52px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }

  .section-padding {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .tech-grid {
    grid-template-columns: 1fr;
  }

  .article-box {
    padding: 24px;
  }

  .article-main-title {
    font-size: 1.6rem;
  }

  .advantages-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }

  .page-content-box {
    padding: 24px;
  }
}