/* 吃瓜大赛 · 夏日多巴胺视觉系统 */
/* 风格：超现实波普 · 渐变流体 · 水果乐园 */
/* 主色调：西瓜红 #FF4D6D + 薄荷绿 #00F5D4 + 奶油黄 #FFF3CD */

*, *::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: linear-gradient(135deg, #FFF8F0 0%, #FFF0E6 30%, #F0FFF4 70%, #E6FFFA 100%);
  color: #2D3436;
  position: relative;
}

/* 装饰性背景元素 */
body::before {
  content: '';
  position: fixed;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 77, 109, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  bottom: -15%;
  left: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 245, 212, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: rgba(255, 243, 205, 0.3);
  backdrop-filter: blur(4px);
}

/* 导航 — 西瓜冰棒风格 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 248, 240, 0.92);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, #FF4D6D, #FF8A5C, #00F5D4) 1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.4rem;
  text-decoration: none;
  color: #FF4D6D;
  letter-spacing: -0.5px;
  position: relative;
}

.logo::after {
  content: '🍉';
  font-size: 1.6rem;
  animation: watermelonBounce 2s ease-in-out infinite;
}

@keyframes watermelonBounce {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(8deg); }
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 77, 109, 0.3);
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  color: #2D3436;
  position: relative;
  padding: 4px 0;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #FF4D6D, #00F5D4);
  transition: width 0.3s ease;
  border-radius: 4px;
}

.main-nav a:hover {
  color: #FF4D6D;
}

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

.nav-cta {
  padding: 10px 24px !important;
  border-radius: 50px !important;
  color: #fff !important;
  font-weight: 700 !important;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C) !important;
  box-shadow: 0 4px 16px rgba(255, 77, 109, 0.35);
  transition: all 0.3s ease !important;
  border: none !important;
}

.nav-cta::before {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 24px rgba(255, 77, 109, 0.45) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C);
  border-radius: 12px;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(255, 77, 109, 0.3);
}

/* Hero — 夏日清凉派对 */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '🍉🍈🍊🍋🍇';
  position: absolute;
  top: 10%;
  right: -5%;
  font-size: 12rem;
  opacity: 0.06;
  transform: rotate(15deg);
  pointer-events: none;
  letter-spacing: 20px;
  white-space: nowrap;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.2), rgba(255, 77, 109, 0.1));
  color: #FF4D6D;
  border: 1.5px solid rgba(255, 77, 109, 0.2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3.6rem;
  line-height: 1.15;
  margin-bottom: 24px;
  font-weight: 900;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C, #00F5D4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.8;
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.7;
  color: #555;
}

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

.hero-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 77, 109, 0.15);
  position: relative;
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.1), rgba(0, 245, 212, 0.1));
  border-radius: 24px;
  z-index: 1;
}

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

/* 按钮 — 多巴胺风格 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  font-size: 0.95rem;
  letter-spacing: 0.3px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C);
  box-shadow: 0 4px 16px rgba(255, 77, 109, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 32px rgba(255, 77, 109, 0.45);
}

.btn-outline {
  background: transparent;
  border: 2.5px solid #FF4D6D;
  color: #FF4D6D;
}

.btn-outline:hover {
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.08), rgba(255, 138, 92, 0.08));
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 77, 109, 0.15);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 16px;
  color: #FF4D6D;
  text-transform: uppercase;
  position: relative;
  padding-left: 28px;
}

.section-label::before {
  content: '🍉';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 16px;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, #2D3436, #FF4D6D);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  max-width: 640px;
  opacity: 0.75;
  margin-bottom: 48px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: #666;
}

/* 卡片网格 — 水果派对 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 20px;
  padding: 32px 28px;
  border: 2px solid transparent;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #FF4D6D, #00F5D4, #FF8A5C);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(255, 77, 109, 0.12);
  border-color: rgba(255, 77, 109, 0.15);
  background: rgba(255, 255, 255, 0.9);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.6rem;
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.1), rgba(0, 245, 212, 0.1));
  box-shadow: 0 2px 8px rgba(255, 77, 109, 0.08);
}

.category-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #2D3436;
}

.category-card p {
  font-size: 0.95rem;
  opacity: 0.65;
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: #FF4D6D;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

.card-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.card-link:hover {
  gap: 10px;
}

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

.feature-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.06);
  position: relative;
}

.feature-image::after {
  content: '🍉';
  position: absolute;
  bottom: -10px;
  right: -10px;
  font-size: 4rem;
  opacity: 0.15;
  transform: rotate(-15deg);
}

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

.feature-text h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.feature-text p {
  opacity: 0.7;
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.feature-list li::before {
  content: '🍈';
  font-weight: 700;
  font-size: 1.2rem;
}

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

.stat-item {
  padding: 32px 20px;
  border-radius: 20px;
  border: 2px solid rgba(255, 77, 109, 0.1);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(4px);
  transition: all 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 77, 109, 0.2);
  box-shadow: 0 8px 24px rgba(255, 77, 109, 0.08);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.95rem;
  opacity: 0.6;
  margin-top: 8px;
  font-weight: 500;
  color: #555;
}

/* 内容墙 — 杂志式网格 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 20px;
  overflow: hidden;
  border: 2px solid rgba(0, 0, 0, 0.04);
  background: #fff;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(255, 77, 109, 0.1);
  border-color: rgba(255, 77, 109, 0.1);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.content-wall-item:hover img {
  transform: scale(1.03);
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.6;
  line-height: 1.6;
}

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

.faq-item {
  border: 2px solid rgba(255, 77, 109, 0.08);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(4px);
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 77, 109, 0.15);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  color: #2D3436;
}

.faq-item .faq-question::after {
  content: '🍉';
  font-size: 1.2rem;
  transition: transform 0.4s ease;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.75;
  line-height: 1.7;
  color: #555;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideIn 0.4s ease;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 0.75; transform: translateY(0); }
}

/* CTA横幅 — 渐变冲击 */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: 28px;
  background: linear-gradient(135deg, #FF4D6D, #FF8A5C, #00F5D4);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(255, 77, 109, 0.25);
}

.cta-banner::before {
  content: '🍉🍈🍊🍋🍇';
  position: absolute;
  top: -20%;
  right: -5%;
  font-size: 8rem;
  opacity: 0.08;
  transform: rotate(20deg);
  pointer-events: none;
  letter-spacing: 16px;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  font-size: 1.1rem;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: #fff;
  color: #FF4D6D;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* 页脚 — 清新渐变 */
.site-footer {
  padding: 64px 0 32px;
  background: linear-gradient(180deg, rgba(255, 248, 240, 0.8), rgba(255, 243, 205, 0.3));
  border-top: 3px solid transparent;
  border-image: linear-gradient(90deg, #FF4D6D, #00F5D4, #FF8A5C) 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #FF4D6D;
  margin-bottom: 12px;
}

.footer-brand p {
  opacity: 0.6;
  line-height: 1.7;
  font-size: 0.95rem;
}

.footer-col h4 {
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 1rem;
  color: #2D3436;
}

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

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

.footer-col ul li a {
  text-decoration: none;
  opacity: 0.6;
  font-size: 0.9rem;
  transition: opacity 0.3s ease, color 0.3s ease;
  color: #555;
}

.footer-col ul li a:hover {
  opacity: 1;
  color: #FF4D6D;
}

.footer-bottom {
  border-top: 2px solid rgba(255, 77, 109, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
  color: #777;
}

/* 工具类 */
.text-accent {
  color: #FF4D6D;
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  line-height: 1.7;
  color: #666;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.8rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .main-nav {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 248, 240, 0.98);
    backdrop-filter: blur(16px);
    padding: 24px 20px;
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, #FF4D6D, #00F5D4) 1;
    gap: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  }
  
  .hero {
    min-height: 60vh;
  }
  
  .hero h1 {
    font-size: 2.4rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  
  .cta-banner {
    padding: 48px 24px;
  }
  
  .cta-banner h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  .logo-icon {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }
}