/* ==========================================
   DESIGN SYSTEM: 新91视频 - 新视界
   Style: 马卡龙渐变杂志风 · 柔和糖果色
   ========================================== */

/* 基础重置 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body { 
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; 
  overflow-x: hidden; 
  background: #fefcf3; 
  color: #3a2e2a;
}

/* 核心布局 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; }
.section:nth-child(even) { 
  background: linear-gradient(135deg, #fdf6e3 0%, #f8ede0 100%);
}

/* 导航 — 固定顶部，半透明磨砂玻璃 */
.site-header { 
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; 
  background: rgba(253, 246, 227, 0.85); 
  backdrop-filter: blur(16px); 
  border-bottom: 1px solid rgba(255, 183, 173, 0.3);
}
.header-inner { 
  display: flex; align-items: center; justify-content: space-between; 
  height: 68px; max-width: 1200px; margin: 0 auto; padding: 0 24px; 
}
.logo { 
  display: flex; align-items: center; gap: 10px; 
  font-weight: 700; font-size: 1.25rem; text-decoration: none; 
  color: #d46a6a; letter-spacing: 1px;
}
.logo-icon { 
  width: 38px; height: 38px; border-radius: 50%; 
  background: linear-gradient(135deg, #f9b5ac, #f5d0c5); 
  display: flex; align-items: center; justify-content: center; 
  font-size: 1.1rem; color: #fff; box-shadow: 0 4px 12px rgba(212,106,106,0.2);
}
.main-nav { display: flex; align-items: center; gap: 28px; list-style: none; }
.main-nav a { 
  text-decoration: none; font-size: 0.9rem; font-weight: 500; 
  color: #5a4a44; transition: 0.2s; position: relative;
}
.main-nav a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; 
  height: 2px; background: #f5a191; transition: 0.3s;
}
.main-nav a:hover { color: #d46a6a; }
.main-nav a:hover::after { width: 100%; }
.nav-cta { 
  padding: 8px 22px; border-radius: 30px; 
  background: linear-gradient(135deg, #f9b5ac, #f5a191); 
  color: #fff !important; font-weight: 600; box-shadow: 0 4px 14px rgba(245,161,145,0.35);
}
.nav-cta::after { display: none; }
.menu-toggle { display: none; }

/* 首页Hero — 马卡龙渐变+圆润气泡 */
.hero { 
  min-height: 70vh; display: flex; align-items: center; 
  background: linear-gradient(160deg, #fefcf3 0%, #fdf1e8 40%, #f8e3d8 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -30%; right: -10%; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(249,181,172,0.25) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -20%; left: -5%; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(245,208,197,0.3) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.hero-content { max-width: 720px; position: relative; z-index: 1; }
.hero-eyebrow { 
  display: inline-block; font-size: 0.85rem; font-weight: 600; 
  padding: 6px 18px; border-radius: 30px; margin-bottom: 16px; 
  background: rgba(245,161,145,0.15); color: #d46a6a; 
  border: 1px solid rgba(245,161,145,0.3); letter-spacing: 1px;
}
.hero h1 { 
  font-size: 3rem; line-height: 1.15; margin-bottom: 20px; 
  color: #3a2e2a; font-weight: 800; letter-spacing: -0.5px;
}
.hero h1 .highlight { color: #d46a6a; }
.hero p { 
  font-size: 1.1rem; opacity: 0.7; max-width: 560px; margin-bottom: 32px; 
  color: #5a4a44; line-height: 1.7;
}
.hero-buttons { display: flex; gap: 14px; }
.hero-image { 
  border-radius: 24px; overflow: hidden; 
  box-shadow: 0 20px 40px -12px rgba(212,106,106,0.2);
}
.hero-image img { width: 100%; height: auto; display: block; }

/* 按钮 — 圆润糖果风 */
.btn { 
  display: inline-flex; align-items: center; gap: 8px; 
  padding: 14px 32px; border-radius: 40px; font-weight: 600; 
  cursor: pointer; border: none; text-decoration: none; transition: 0.3s;
  font-size: 0.95rem;
}
.btn-primary { 
  background: linear-gradient(135deg, #f9b5ac, #f5a191); 
  color: #fff; box-shadow: 0 6px 20px rgba(245,161,145,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,161,145,0.45); }
.btn-outline { 
  background: transparent; border: 1.5px solid #f5a191; 
  color: #d46a6a; 
}
.btn-outline:hover { background: rgba(245,161,145,0.08); }

/* 标签/标题 */
.section-label { 
  display: inline-block; font-size: 0.8rem; font-weight: 600; 
  letter-spacing: 3px; margin-bottom: 12px; 
  color: #d46a6a; text-transform: uppercase;
}
.section-title { 
  font-size: 2.2rem; margin-bottom: 14px; color: #3a2e2a; 
  font-weight: 700; line-height: 1.2;
}
.section-desc { max-width: 600px; opacity: 0.7; margin-bottom: 40px; color: #5a4a44; }

/* 卡片网格 — 糖果色卡片，圆润阴影 */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 28px; }
.category-card { 
  border-radius: 20px; padding: 32px 28px; 
  background: #fff; border: 1px solid rgba(245,161,145,0.15); 
  transition: 0.3s; box-shadow: 0 4px 12px rgba(212,106,106,0.04);
}
.category-card:hover { 
  transform: translateY(-6px); 
  box-shadow: 0 12px 32px rgba(212,106,106,0.12);
  border-color: rgba(245,161,145,0.3);
}
.card-icon { 
  width: 52px; height: 52px; border-radius: 16px; 
  display: flex; align-items: center; justify-content: center; 
  margin-bottom: 18px; font-size: 1.5rem; 
  background: linear-gradient(135deg, #fdf1e8, #f8e3d8); color: #d46a6a;
}
.category-card h3 { font-size: 1.1rem; margin-bottom: 8px; color: #3a2e2a; }
.category-card p { font-size: 0.9rem; opacity: 0.6; margin-bottom: 16px; color: #5a4a44; }
.card-link { 
  font-weight: 600; font-size: 0.85rem; text-decoration: none; 
  color: #d46a6a; display: inline-flex; align-items: center; gap: 4px;
}
.card-link:hover { color: #f5a191; }

/* 特性块 */
.feature-block { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.feature-image { border-radius: 20px; overflow: hidden; box-shadow: 0 12px 28px -8px rgba(212,106,106,0.15); }
.feature-image img { width: 100%; height: auto; display: block; }
.feature-text { }
.feature-text .section-title { margin-top: 8px; }
.feature-list { list-style: none; margin-top: 16px; }
.feature-list li { 
  padding: 8px 0; display: flex; align-items: center; gap: 10px; 
  font-size: 0.95rem; color: #5a4a44;
}
.feature-list li::before { 
  content: '✦'; font-weight: 700; color: #f5a191; font-size: 1.1rem;
}

/* 数据条 — 柔和的渐变背景 */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item { 
  padding: 28px 16px; border-radius: 20px; 
  background: linear-gradient(145deg, #fff, #fdf6f0); 
  border: 1px solid rgba(245,161,145,0.15); 
  box-shadow: 0 4px 12px rgba(212,106,106,0.04);
}
.stat-number { 
  font-size: 2.4rem; font-weight: 800; 
  background: linear-gradient(135deg, #d46a6a, #f5a191); 
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.9rem; opacity: 0.6; margin-top: 6px; color: #5a4a44; }

/* 内容墙 — 错落卡片 */
.content-wall { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 28px; }
.content-wall-item { 
  border-radius: 20px; overflow: hidden; 
  background: #fff; border: 1px solid rgba(245,161,145,0.12); 
  transition: 0.3s; box-shadow: 0 4px 12px rgba(212,106,106,0.04);
}
.content-wall-item:hover { 
  transform: translateY(-5px); 
  box-shadow: 0 12px 32px rgba(212,106,106,0.12);
}
.content-wall-item img { 
  width: 100%; height: 200px; object-fit: cover; 
  border-bottom: 1px solid rgba(245,161,145,0.1);
}
.content-wall-body { padding: 22px; }
.content-wall-body h4 { font-size: 1.05rem; margin-bottom: 6px; color: #3a2e2a; }
.content-wall-body p { font-size: 0.9rem; opacity: 0.6; color: #5a4a44; }

/* FAQ — 圆润折叠 */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { 
  border: 1px solid rgba(245,161,145,0.2); border-radius: 16px; 
  margin-bottom: 10px; overflow: hidden; cursor: pointer; 
  background: #fff; transition: 0.2s;
}
.faq-item:hover { border-color: rgba(245,161,145,0.35); }
.faq-item .faq-question { 
  padding: 18px 22px; font-weight: 600; 
  display: flex; justify-content: space-between; 
  color: #3a2e2a; font-size: 1rem;
}
.faq-item .faq-question::after { 
  content: '+'; font-size: 1.3rem; color: #f5a191; transition: 0.3s;
}
.faq-item.open .faq-question::after { content: '−'; }
.faq-item .faq-answer { 
  padding: 0 22px 18px; display: none; opacity: 0.7; 
  color: #5a4a44; line-height: 1.6;
}
.faq-item.open .faq-answer { display: block; }

/* CTA横幅 — 渐变糖果 */
.cta-banner { 
  padding: 64px 24px; text-align: center; border-radius: 24px; 
  background: linear-gradient(135deg, #f9b5ac, #f5a191, #d46a6a); 
  color: #fff; box-shadow: 0 16px 40px -8px rgba(212,106,106,0.3);
}
.cta-banner h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; }
.cta-banner .btn-primary { 
  background: #fff; color: #d46a6a; 
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.cta-banner .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0,0,0,0.12); }

/* 页脚 — 暖色延续 */
.site-footer { 
  padding: 56px 0 28px; 
  background: linear-gradient(180deg, #fefcf3, #fdf1e8);
  border-top: 1px solid rgba(245,161,145,0.15);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand { }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; opacity: 0.6; color: #5a4a44; max-width: 260px; line-height: 1.6; }
.footer-col h5 { font-size: 0.95rem; font-weight: 600; margin-bottom: 14px; color: #3a2e2a; }
.footer-col a { 
  display: block; font-size: 0.9rem; opacity: 0.6; 
  text-decoration: none; color: #5a4a44; padding: 4px 0; transition: 0.2s;
}
.footer-col a:hover { opacity: 1; color: #d46a6a; }
.footer-bottom { 
  border-top: 1px solid rgba(245,161,145,0.15); 
  margin-top: 40px; padding-top: 20px; text-align: center; 
  font-size: 0.85rem; color: #5a4a44; opacity: 0.6;
}

/* 工具类 */
.text-accent { color: #d46a6a; }
.text-center { text-align: center; }
.seo-description { max-width: 600px; margin: 0 auto 48px; opacity: 0.7; color: #5a4a44; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; gap: 32px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 2.2rem; }
  .main-nav { display: none; }
  .menu-toggle { display: flex; }
  .main-nav.open { 
    display: flex; flex-direction: column; 
    position: absolute; top: 68px; left: 0; width: 100%; 
    background: rgba(253, 246, 227, 0.98); padding: 24px; 
    gap: 16px; border-bottom: 1px solid rgba(245,161,145,0.2);
  }
  .main-nav.open a { padding: 6px 0; }
}
@media (max-width: 480px) {
  .cards-grid, .content-wall, .stats-bar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
  .hero h1 { font-size: 1.8rem; }
  .section-title { font-size: 1.6rem; }
}