/* ================================================
   快猫短视频 · 温暖气泡设计系统
   珊瑚红 × 薄荷绿 × 奶油白
   ================================================ */

*, *::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: #FDF8F2;
  color: #2D1B12;
  line-height: 1.6;
}

/* ---------- 核心布局 ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.section {
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.section:nth-child(even) {
  background: #FFF0E8;
}

.section::before {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255, 107, 74, 0.04);
  top: 40%;
  right: -120px;
  pointer-events: none;
  z-index: 1;
}

.section::after {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(0, 184, 169, 0.05);
  bottom: -60px;
  left: -40px;
  pointer-events: none;
  z-index: 1;
}

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 248, 242, 0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: none;
  box-shadow: 0 4px 40px rgba(255, 107, 74, 0.06);
  border-radius: 0 0 28px 28px;
}

.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: 900;
  font-size: 1.25rem;
  text-decoration: none;
  color: inherit;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: linear-gradient(135deg, #FF6B4A, #FFC94A);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 14px rgba(255, 107, 74, 0.3);
  transform: rotate(-6deg);
  transition: transform 0.3s ease;
}

.logo:hover .logo-icon {
  transform: rotate(6deg) scale(1.06);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #2D1B12;
  opacity: 0.75;
  transition: all 0.3s ease;
  position: relative;
  padding: 6px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, #FF6B4A, #FFC94A);
  transition: width 0.3s ease;
}

.main-nav a:hover {
  opacity: 1;
}

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 22px !important;
  border-radius: 50px !important;
  background: linear-gradient(135deg, #FF6B4A, #FF8E6A);
  color: #fff !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 16px rgba(255, 107, 74, 0.3);
  opacity: 1 !important;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 8px 24px rgba(255, 107, 74, 0.4);
}

.nav-cta::after {
  display: none;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: #FFF0E8;
  border: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #2D1B12;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(145deg, #FFE8D6 0%, #FDF8F2 55%, #E4F5F0 100%);
  position: relative;
  overflow: hidden;
  border-radius: 0 0 48px 48px;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 107, 74, 0.08);
  top: -180px;
  right: -100px;
}

.hero::after {
  content: '';
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(0, 184, 169, 0.1);
  bottom: 20px;
  left: 8%;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 20px;
  border-radius: 50px;
  background: #fff;
  color: #FF6B4A;
  box-shadow: 0 4px 16px rgba(255, 107, 74, 0.12);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.2rem);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -2px;
  margin-bottom: 24px;
  background: linear-gradient(120deg, #2D1B12 20%, #FF6B4A 60%, #FFC94A 90%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.7;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: 32px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(255, 107, 74, 0.15);
  transform: rotate(2deg);
  border: 6px solid #fff;
  position: relative;
  z-index: 2;
  transition: transform 0.5s ease;
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.02);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s ease;
  letter-spacing: 0.3px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #FF6B4A, #FF8E6A);
  box-shadow: 0 6px 24px rgba(255, 107, 74, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255, 107, 74, 0.45);
}

.btn-outline {
  background: transparent;
  border: 2px solid #FF6B4A;
  color: #FF6B4A;
}

.btn-outline:hover {
  background: rgba(255, 107, 74, 0.08);
  transform: translateY(-3px);
}

/* ---------- 标签/标题 ---------- */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: #FF6B4A;
  background: rgba(255, 107, 74, 0.08);
  padding: 6px 18px;
  border-radius: 50px;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -1px;
  color: #2D1B12;
  line-height: 1.2;
}

.section-desc {
  max-width: 600px;
  opacity: 0.65;
  margin-bottom: 48px;
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 28px;
  padding: 32px 28px;
  background: #fff;
  border: none;
  box-shadow: 0 8px 32px rgba(45, 27, 18, 0.06);
  transition: all 0.4s cubic-bezier(0.17, 0.67, 0.35, 1.15);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 107, 74, 0.06);
  top: -40px;
  right: -40px;
  transition: transform 0.4s ease;
}

.category-card:hover {
  transform: translateY(-8px) rotate(-1.5deg);
  box-shadow: 0 20px 60px rgba(255, 107, 74, 0.15);
}

.category-card:hover::before {
  transform: scale(1.8);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #FFE8D6, #FFD8C4);
  box-shadow: 0 4px 12px rgba(255, 107, 74, 0.18);
}

.category-card:nth-child(2n) .card-icon {
  background: linear-gradient(135deg, #E0F5EE, #C8EDE4);
  box-shadow: 0 4px 12px rgba(0, 184, 169, 0.15);
}

.category-card:nth-child(3n) .card-icon {
  background: linear-gradient(135deg, #FFF4D6, #FFE8A8);
  box-shadow: 0 4px 12px rgba(255, 201, 74, 0.2);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #2D1B12;
}

.category-card > p {
  font-size: 0.88rem;
  opacity: 0.6;
  line-height: 1.7;
  margin-bottom: 14px;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: #FF6B4A;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

.card-link:hover {
  gap: 12px;
}

/* ---------- 特性块 ---------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 32px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 184, 169, 0.12);
  border: 6px solid #fff;
  transform: rotate(-2deg);
  transition: transform 0.5s ease;
}

.feature-image:hover {
  transform: rotate(0deg);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-text {
  position: relative;
  z-index: 2;
}

.feature-text .section-title {
  margin-bottom: 18px;
}

.feature-text .section-desc {
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  margin-top: 20px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(45, 27, 18, 0.8);
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  color: #00B8A9;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(0, 184, 169, 0.1);
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* ---------- 数据条 ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 36px 20px;
  border-radius: 28px;
  background: #fff;
  border: none;
  box-shadow: 0 8px 32px rgba(45, 27, 18, 0.05);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 107, 74, 0.06);
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(255, 107, 74, 0.12);
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -2px;
  background: linear-gradient(135deg, #FF6B4A, #FFC94A);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  font-weight: 500;
}

/* ---------- 内容墙 ---------- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 24px;
  overflow: hidden;
  border: none;
  background: #fff;
  box-shadow: 0 8px 32px rgba(45, 27, 18, 0.05);
  transition: all 0.4s ease;
}

.content-wall-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(255, 107, 74, 0.12);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.06);
}

.content-wall-body {
  padding: 22px 22px 26px;
}

.content-wall-body h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #2D1B12;
}

.content-wall-body p {
  font-size: 0.85rem;
  opacity: 0.6;
  line-height: 1.6;
  margin-bottom: 12px;
}

.content-wall-body .card-link {
  font-size: 0.8rem;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: none;
  border-radius: 20px;
  margin-bottom: 14px;
  background: #fff;
  box-shadow: 0 4px 16px rgba(45, 27, 18, 0.04);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s ease;
}

.faq-item:hover {
  box-shadow: 0 8px 32px rgba(255, 107, 74, 0.08);
}

.faq-item.open {
  box-shadow: 0 8px 40px rgba(255, 107, 74, 0.12);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #2D1B12;
  gap: 16px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: #FF6B4A;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.7;
  font-size: 0.9rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 0.7; transform: translateY(0); }
}

/* ---------- CTA横幅 ---------- */
.cta-banner {
  padding: 72px 48px;
  text-align: center;
  border-radius: 40px;
  background: linear-gradient(135deg, #FF6B4A, #FF9A6A 60%, #FFC94A);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(255, 107, 74, 0.3);
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -100px;
  right: -60px;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  bottom: -60px;
  left: 20px;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -1px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 28px;
  font-size: 1.05rem;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: #fff;
  color: #FF6B4A;
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  box-shadow: 0 12px 32px rgba(255, 255, 255, 0.35);
  transform: translateY(-3px);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 64px 0 28px;
  background: linear-gradient(180deg, #FDF8F2, #FFF0E8);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 107, 74, 0.04);
  bottom: -80px;
  right: 10%;
}

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

.footer-brand h4 {
  font-size: 1.3rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.footer-brand p {
  font-size: 0.88rem;
  opacity: 0.6;
  line-height: 1.7;
  max-width: 260px;
}

.footer-col h5 {
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #2D1B12;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul a {
  text-decoration: none;
  font-size: 0.88rem;
  color: rgba(45, 27, 18, 0.7);
  transition: color 0.2s ease;
}

.footer-col ul a:hover {
  color: #FF6B4A;
}

.footer-bottom {
  border-top: 1px solid rgba(45, 27, 18, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.55;
}

/* ---------- 工具类 ---------- */
.text-accent {
  color: #FF6B4A;
  font-weight: 700;
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.65;
  font-size: 1rem;
  line-height: 1.8;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* 背景装饰圆点通用 */
.bg-dots {
  background-image: radial-gradient(rgba(255, 107, 74, 0.08) 2px, transparent 2px);
  background-size: 28px 28px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero {
    padding: 110px 0 60px;
  }
  .feature-block {
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .feature-image {
    order: -1;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  .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, 248, 242, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px 24px 32px;
    gap: 18px;
    border-radius: 0 0 28px 28px;
    box-shadow: 0 12px 40px rgba(45, 27, 18, 0.08);
  }
  
  .main-nav.open a {
    font-size: 1.05rem;
    padding: 8px 0;
  }
  
  .nav-cta {
    text-align: center;
  }

  .hero {
    min-height: auto;
    border-radius: 0 0 32px 32px;
    padding: 100px 0 56px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .cta-banner {
    padding: 48px 24px;
    border-radius: 28px;
  }

  .card-icon {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }

  .category-card {
    padding: 24px 20px;
    border-radius: 22px;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  
  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.9rem;
    letter-spacing: -1px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  .stats-bar {
    gap: 12px;
  }

  .stat-item {
    padding: 24px 16px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .footer-bottom {
    font-size: 0.75rem;
    padding-top: 20px;
  }
}