/* ============================================================
   每日吃瓜 · 鲜切西瓜视觉体系
   Awwwards Edition — Juicy Watermelon Design Language
   ============================================================ */

:root {
  --primary: #FF4E50;
  --primary-deep: #E63C3D;
  --primary-light: #FF8A80;
  --primary-pale: #FFD1D1;
  --primary-mist: #FFF0EF;
  --mint: #2EC4B6;
  --mint-deep: #1FA394;
  --mint-mist: #E8FAF8;
  --lemon: #FFD93D;
  --lemon-mist: #FFF9E6;
  --ink: #22223B;
  --ink-soft: #5A5A6E;
  --paper: #FFF9F2;
  --white: #FFFFFF;
  --r-xl: 40px;
  --r-lg: 32px;
  --r-md: 20px;
  --r-sm: 12px;
  --shadow-sm: 0 4px 16px rgba(255, 78, 80, 0.08);
  --shadow-md: 0 10px 36px rgba(255, 78, 80, 0.14);
  --shadow-lg: 0 20px 56px rgba(255, 78, 80, 0.18);
  --gradient-primary: linear-gradient(135deg, #FF4E50 0%, #FF8A80 100%);
  --gradient-lemon: linear-gradient(135deg, #FFD93D 0%, #FFB347 100%);
  --gradient-mint: linear-gradient(135deg, #2EC4B6 0%, #7BE0CE 100%);
}

/* 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: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  letter-spacing: 0.01em;
}

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

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

.section:nth-child(even) { background: var(--mint-mist); }

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-primary);
  opacity: 0.6;
}

/* ============ 导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 242, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 78, 80, 0.12);
  box-shadow: 0 1px 20px rgba(255, 78, 80, 0.05);
}

.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: 1.3rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 78, 80, 0.3);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 14px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 50%;
  transform: rotate(-20deg);
  box-shadow: 6px 8px 0 -2px rgba(0, 0, 0, 0.15);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-soft);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient-primary);
  transition: width 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

.nav-cta {
  padding: 10px 24px;
  border-radius: 50px;
  color: #fff !important;
  font-weight: 700;
  background: var(--gradient-primary);
  box-shadow: 0 4px 16px rgba(255, 78, 80, 0.28);
  transition: transform 0.3s ease, box-shadow 0.3s ease !important;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(255, 78, 80, 0.35);
}

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: var(--primary-mist);
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--primary);
}

/* ============ Hero ============ */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-mist) 0%, var(--paper) 45%, var(--mint-mist) 100%);
  border-radius: 0 0 48px 48px;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background-image:
    radial-gradient(ellipse 3px 5px at 30% 25%, rgba(60, 30, 30, 0.3) 60%, transparent 70%),
    radial-gradient(ellipse 3px 5px at 68% 30%, rgba(60, 30, 30, 0.25) 60%, transparent 70%),
    radial-gradient(ellipse 3px 5px at 42% 65%, rgba(60, 30, 30, 0.3) 60%, transparent 70%),
    radial-gradient(ellipse 3px 5px at 65% 72%, rgba(60, 30, 30, 0.25) 60%, transparent 70%),
    radial-gradient(ellipse 3px 5px at 48% 45%, rgba(60, 30, 30, 0.2) 60%, transparent 70%),
    radial-gradient(ellipse 2px 4px at 25% 55%, rgba(60, 30, 30, 0.2) 60%, transparent 70%),
    radial-gradient(circle at 50% 50%,
      #FF6B6C 0%,
      #FF4E50 38%,
      #FF8A80 48%,
      #FFB3B4 54%,
      #FFF5F0 58%,
      #F0FFFF 62%,
      #2EC4B6 68%,
      #1FA394 73%,
      transparent 78%);
  opacity: 0.28;
  pointer-events: none;
  z-index: 0;
  animation: slowSpin 40s linear infinite;
}

.hero::after {
  content: '';
  position: absolute;
  left: -60px;
  bottom: -20px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--lemon-mist) 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

@keyframes slowSpin {
  from { transform: translateY(-50%) rotate(0deg); }
  to { transform: translateY(-50%) rotate(360deg); }
}

.hero-content {
  max-width: 680px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 24px;
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 78, 80, 0.1);
  letter-spacing: 0.06em;
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 24px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}

.hero p {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 540px;
  margin-bottom: 36px;
  line-height: 1.8;
}

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

.hero-image {
  border-radius: var(--r-xl);
  overflow: hidden;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
  border: 8px solid rgba(255, 255, 255, 0.8);
}

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

.hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(255, 78, 80, 0.1) 100%);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 78, 80, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 78, 80, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--primary-mist);
  transform: translateY(-2px);
}

/* ============ 标签/标题 ============ */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  margin-bottom: 14px;
  color: var(--mint-deep);
  text-transform: uppercase;
  background: var(--mint-mist);
  padding: 6px 16px;
  border-radius: 50px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 5px;
  border-radius: 5px;
  background: var(--gradient-primary);
}

.section-desc {
  max-width: 600px;
  color: var(--ink-soft);
  margin-bottom: 48px;
  font-size: 1.05rem;
  line-height: 1.7;
}

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

.category-card {
  border-radius: var(--r-md);
  padding: 32px 28px;
  background: var(--white);
  border: none;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(40, 40, 70, 0.04);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.category-card:hover {
  transform: translateY(-8px) rotate(0.8deg);
  box-shadow: var(--shadow-md);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  background: var(--primary-mist);
  color: var(--primary);
  transition: transform 0.3s ease;
}

.category-card:hover .card-icon {
  transform: scale(1.1) rotate(-6deg);
}

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

.category-card p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
  line-height: 1.6;
}

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

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

/* ============ 特性块 ============ */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  background: linear-gradient(135deg, var(--mint-mist) 0%, var(--paper) 100%);
  border-radius: var(--r-xl);
  padding: 56px;
  border: 1px solid rgba(46, 196, 182, 0.15);
  position: relative;
  overflow: hidden;
}

.feature-block::before {
  content: '●';
  position: absolute;
  top: -20px;
  right: 20px;
  font-size: 160px;
  color: rgba(46, 196, 182, 0.08);
  line-height: 1;
}

.feature-image {
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}

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

.feature-text {
  position: relative;
  z-index: 1;
}

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.feature-text p {
  color: var(--ink-soft);
  margin-bottom: 24px;
  line-height: 1.7;
}

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

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
}

/* ============ 数据条 ============ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 36px 20px;
  border-radius: var(--r-md);
  background: var(--white);
  border: none;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.stat-item::after {
  content: '🍉';
  position: absolute;
  bottom: 10px;
  right: 8px;
  font-size: 1.4rem;
  opacity: 0.06;
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--ink-soft);
  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: var(--r-md);
  overflow: hidden;
  background: var(--white);
  border: none;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.content-wall-body p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

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

.faq-item {
  background: var(--white);
  border: 1px solid rgba(255, 78, 80, 0.08);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 78, 80, 0.2);
  box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.98rem;
  color: var(--ink);
}

.faq-item .faq-question::after {
  content: '↓';
  font-size: 1.2rem;
  color: var(--primary);
  transition: transform 0.35s ease;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.7;
  border-top: 1px dashed rgba(255, 78, 80, 0.12);
  padding-top: 14px;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideIn 0.35s ease;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ CTA横幅 ============ */
.cta-banner {
  padding: 72px 48px;
  text-align: center;
  border-radius: var(--r-xl);
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 24px 64px rgba(255, 78, 80, 0.35);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '🍉';
  position: absolute;
  left: -20px;
  bottom: -30px;
  font-size: 120px;
  opacity: 0.12;
  transform: rotate(20deg);
}

.cta-banner::after {
  content: '✿';
  position: absolute;
  right: 24px;
  top: 16px;
  font-size: 56px;
  opacity: 0.1;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.18);
}

/* ============ 页脚 ============ */
.site-footer {
  padding: 72px 0 28px;
  background: var(--mint-mist);
  color: var(--ink);
  border-radius: 48px 48px 0 0;
  margin-top: 20px;
}

.site-footer .container {
  position: relative;
}

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

.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  max-width: 280px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 18px;
  color: var(--ink);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

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

.footer-col ul a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 78, 80, 0.1);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.footer-bottom .heart {
  color: var(--primary);
  display: inline-block;
  animation: beat 1.5s infinite;
}

@keyframes beat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* ============ 工具类 ============ */
.text-accent {
  color: var(--primary);
  font-weight: 700;
}

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

.seo-description {
  max-width: 620px;
  margin: 0 auto 48px;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.8;
  text-align: center;
}

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

/* 添加有趣的水印装饰 */
.section::after {
  content: '';
  position: absolute;
  right: 30px;
  bottom: 30px;
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, var(--primary-pale) 0%, transparent 70%);
  opacity: 0.3;
  pointer-events: none;
  border-radius: 50%;
}

/* 选择文本颜色 */
::selection {
  background: var(--primary);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--paper);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--primary), var(--primary-light));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-deep);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
  .feature-block { padding: 40px; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .hero { min-height: auto; border-radius: 0 0 32px 32px; padding: 100px 0 56px; }
  .hero::before { width: 360px; height: 360px; right: -80px; }
  .hero h1 { font-size: 2.2rem; }
  .feature-block { grid-template-columns: 1fr; padding: 32px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--paper);
    padding: 24px;
    gap: 18px;
    flex-direction: column;
    align-items: flex-start;
    border-bottom: 1px solid rgba(255, 78, 80, 0.1);
    box-shadow: var(--shadow-md);
  }
  .main-nav.open {
    display: flex;
    animation: fadeSlideDown 0.3s ease;
  }
  .menu-toggle {
    display: flex;
  }
  .nav-cta {
    width: 100%;
    text-align: center;
    justify-content: center;
    display: flex;
  }
  .cta-banner { padding: 48px 24px; }
  .cta-banner h2 { font-size: 1.7rem; }
}

@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(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-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  .section-title { font-size: 1.8rem; }
  .stat-number { font-size: 2.2rem; }
  .hero-image { transform: rotate(0deg); }
  .feature-block { padding: 24px; }
  .cta-banner::before { font-size: 80px; }
}