/* ==========================================================================
   🍉 CHIGUA · 每日吃瓜大赛 设计系统
   风格：西瓜汽水 / 孟菲斯果园 / 气泡杂志
   色板：西瓜红 #FF5E5B · 薄荷绿 #2BC0A4 · 柠檬黄 #FFC93C
   ========================================================================== */

:root {
  --melon: #FF5E5B;
  --melon-dark: #E63946;
  --mint: #2BC0A4;
  --mint-pale: #E0F7F1;
  --lemon: #FFC93C;
  --cream: #FFF7F0;
  --cream-deep: #FFEAD9;
  --ink: #1A1A2E;
  --ink-soft: rgba(26, 26, 46, 0.68);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --shadow-melon: 0 16px 48px -12px rgba(255, 94, 91, 0.32);
  --shadow-mint: 0 16px 48px -12px rgba(43, 192, 164, 0.3);
}

/* ---------- 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-color: var(--cream);
  background-image:
    radial-gradient(rgba(255, 94, 91, 0.055) 1.5px, transparent 1.5px),
    radial-gradient(rgba(43, 192, 164, 0.05) 1.5px, transparent 1.5px);
  background-size: 32px 32px, 32px 32px;
  background-position: 0 0, 16px 16px;
  color: var(--ink);
  line-height: 1.65;
}

::selection {
  background: var(--melon);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--cream);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--melon), var(--mint));
  border-radius: 12px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--lemon);
  outline-offset: 2px;
}

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

.section {
  padding: 96px 0;
  position: relative;
}

.section:nth-child(even) {
  background: linear-gradient(180deg, var(--mint-pale), #f4fcf9);
}

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 247, 240, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 94, 91, 0.18), 0 6px 32px rgba(255, 94, 91, 0.06);
  border-bottom: none;
}

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

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--melon), #ff8a5c);
  box-shadow: 0 5px 18px rgba(255, 94, 91, 0.35);
  transform: rotate(-8deg);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover .logo-icon {
  transform: rotate(8deg) scale(1.06);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink-soft);
  padding: 8px 16px;
  border-radius: 40px;
  position: relative;
  transition: color 0.25s, background 0.25s;
}

.main-nav a:hover {
  color: var(--melon);
  background: rgba(255, 94, 91, 0.08);
}

.main-nav a::after {
  content: '🍉';
  position: absolute;
  bottom: -14px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  font-size: 0.7rem;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.main-nav a:hover::after {
  transform: translateX(-50%) scale(1);
}

.nav-cta {
  padding: 10px 24px;
  border-radius: 40px;
  color: #fff !important;
  background: linear-gradient(135deg, var(--melon), var(--melon-dark));
  box-shadow: var(--shadow-melon);
  font-weight: 700 !important;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 20px 40px -12px rgba(255, 94, 91, 0.45);
}

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

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: var(--mint-pale);
  border-radius: 14px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--ink);
  transition: background 0.2s;
}

.menu-toggle:hover {
  background: var(--lemon);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 201, 60, 0.25) 0 120px, transparent 121px),
    radial-gradient(circle at 5% 80%, rgba(43, 192, 164, 0.2) 0 160px, transparent 161px),
    radial-gradient(circle at 70% 70%, rgba(255, 94, 91, 0.12) 0 100px, transparent 101px),
    var(--cream);
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 72px;
  justify-content: space-between;
}

.hero-content {
  flex: 1;
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 8px 18px;
  border-radius: 40px;
  background: var(--mint);
  color: #fff;
  letter-spacing: 1px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-mint);
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--ink);
}

.hero h1::after {
  content: '';
  display: block;
  width: 88px;
  height: 6px;
  background: linear-gradient(90deg, var(--melon), var(--lemon), var(--mint));
  border-radius: 6px;
  margin-top: 22px;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
}

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

.hero-image {
  flex: 0 0 360px;
  height: 360px;
  border-radius: 50%;
  padding: 14px;
  border: 3px dashed var(--melon);
  background: #fff;
  position: relative;
  box-shadow: var(--shadow-melon), var(--shadow-mint);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--mint-pale), #fff3e0);
  z-index: 0;
}

.hero-image img {
  position: relative;
  z-index: 1;
  width: calc(100% - 28px);
  height: calc(100% - 28px);
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--lemon);
  background: #fff;
}

.hero-image::after {
  content: '🍉 每日鲜瓜直供';
  position: absolute;
  bottom: 12px;
  right: -12px;
  background: var(--lemon);
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 8px 16px;
  border-radius: 40px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
  z-index: 2;
  transform: rotate(-6deg);
  white-space: nowrap;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 40px;
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--melon), var(--melon-dark));
  box-shadow: var(--shadow-melon);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 20px 48px -12px rgba(255, 94, 91, 0.4);
}

.btn-outline {
  background: #fff;
  border: 2px solid var(--mint);
  color: var(--mint);
}

.btn-outline:hover {
  background: var(--mint);
  color: #fff;
  transform: translateY(-3px);
}

/* ---------- 标签 / 标题 ---------- */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 14px;
  color: var(--melon);
  background: rgba(255, 94, 91, 0.1);
  padding: 6px 18px;
  border-radius: 40px;
  text-transform: uppercase;
  transform: rotate(-2deg);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--ink);
  line-height: 1.2;
}

.section-desc {
  max-width: 600px;
  opacity: 0.72;
  font-size: 1.05rem;
  margin-bottom: 48px;
}

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

.category-card {
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid rgba(255, 94, 91, 0.12);
  background: #fff;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.category-card:nth-child(2n) {
  background: var(--mint-pale);
}

.category-card:nth-child(3n) {
  background: #fff9e8;
}

.category-card::before {
  content: '🍉';
  position: absolute;
  top: -20px;
  right: -20px;
  font-size: 5rem;
  opacity: 0.1;
  transform: rotate(20deg);
  transition: transform 0.3s;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-melon);
  border-color: transparent;
}

.category-card:hover::before {
  transform: rotate(0deg) scale(1.1);
}

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

.category-card p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 16px;
  position: relative;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.6rem;
  background: var(--mint-pale);
  transition: background 0.3s;
  position: relative;
}

.category-card:hover .card-icon {
  background: var(--mint);
}

.card-link {
  font-weight: 800;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--melon);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.card-link::after {
  content: '→';
  transition: transform 0.2s;
}

.card-link:hover::after {
  transform: translateX(4px);
}

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

.feature-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  background: var(--mint-pale);
  border: 8px solid #fff;
  box-shadow: var(--shadow-mint);
  transform: rotate(-2deg);
  transition: transform 0.3s;
}

.feature-image:hover {
  transform: rotate(0deg) scale(1.01);
}

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

.feature-text {
  position: relative;
}

.feature-text .section-label {
  background: var(--lemon);
  color: var(--ink);
}

.feature-text > p {
  opacity: 0.72;
  margin-bottom: 16px;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  border-bottom: 1px dashed rgba(26, 26, 46, 0.12);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mint);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  flex-shrink: 0;
}

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

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-xl);
  background: #fff;
  border: 2px solid rgba(26, 26, 46, 0.04);
  border-top: 6px solid transparent;
  position: relative;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 16px rgba(26, 26, 46, 0.04);
}

.stat-item:nth-child(1) {
  border-top-color: var(--melon);
}

.stat-item:nth-child(2) {
  border-top-color: var(--mint);
}

.stat-item:nth-child(3) {
  border-top-color: var(--lemon);
}

.stat-item:nth-child(4) {
  border-top-color: var(--melon);
}

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

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--melon), var(--melon-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.62;
  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(--radius-lg);
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(26, 26, 46, 0.08);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.content-wall-item:hover {
  transform: translateY(-8px) rotate(1deg);
  box-shadow: var(--shadow-melon), var(--shadow-mint);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.4s;
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

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

.content-wall-body h3 {
  font-weight: 800;
  margin-bottom: 8px;
}

.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.7;
}

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

.faq-item {
  border: 2px solid rgba(26, 26, 46, 0.06);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  background: #fff;
  cursor: pointer;
  transition: all 0.3s;
}

.faq-item:hover {
  border-color: rgba(255, 94, 91, 0.3);
  box-shadow: var(--shadow-melon);
}

.faq-item.open {
  border-color: var(--melon);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 800;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 1.05rem;
  position: relative;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--melon);
  transition: transform 0.3s;
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer {
  padding: 0 24px 24px;
  opacity: 0.72;
  line-height: 1.8;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding: 72px 48px;
  text-align: center;
  border-radius: var(--radius-xl);
  color: #fff;
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 255, 255, 0.18) 0 30px, transparent 30px),
    radial-gradient(circle at 85% 70%, rgba(255, 255, 255, 0.15) 0 40px, transparent 40px),
    radial-gradient(circle at 70% 25%, rgba(255, 255, 255, 0.1) 0 20px, transparent 20px),
    linear-gradient(135deg, #ff8a5c, var(--melon-dark));
  box-shadow: var(--shadow-melon);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '🍉🍉🍉';
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 6rem;
  opacity: 0.12;
  letter-spacing: 40px;
  white-space: nowrap;
}

.cta-banner::after {
  content: '🍉 今日份新鲜真相已上线';
  position: absolute;
  top: 24px;
  right: 24px;
  background: #fff;
  color: var(--melon);
  font-weight: 800;
  font-size: 0.8rem;
  padding: 8px 16px;
  border-radius: 40px;
  transform: rotate(5deg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
}

.cta-banner p {
  position: relative;
  color: rgba(255, 255, 255, 0.92);
  max-width: 480px;
  margin: 0 auto 32px;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--melon);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  position: relative;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.22);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 64px 0 32px;
  background: linear-gradient(135deg, var(--mint), #159a82);
  color: #fff;
  border-radius: 48px 48px 0 0;
  margin-top: 80px;
  position: relative;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.1) 0 100px, transparent 100px),
    radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.08) 0 120px, transparent 120px);
}

.site-footer .container {
  position: relative;
  z-index: 2;
}

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

.footer-brand {
  font-size: 0.95rem;
  opacity: 0.92;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand .logo-icon {
  background: #fff;
  color: var(--mint);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--lemon);
  letter-spacing: 1px;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: color 0.2s, transform 0.2s;
}

.footer-col a:hover {
  color: var(--lemon);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.88;
}

/* ---------- 工具类 ---------- */
.text-accent {
  color: var(--melon);
  position: relative;
  white-space: nowrap;
}

.text-accent::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.08em;
  width: 100%;
  height: 0.35em;
  background: linear-gradient(90deg, rgba(255, 201, 60, 0.65), rgba(255, 94, 91, 0.15));
  border-radius: 4px;
  z-index: -1;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
}

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

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

/* ---------- 响应式 ---------- */
@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;
    gap: 32px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 16px;
    width: calc(100% - 32px);
    background: #fff;
    padding: 16px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-melon);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border: 2px solid rgba(255, 94, 91, 0.1);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 12px 16px;
  }

  .menu-toggle {
    display: flex;
  }

  .hero .container {
    flex-direction: column;
    text-align: center;
    gap: 48px;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero h1::after {
    margin-left: auto;
    margin-right: auto;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    flex: 0 0 260px;
    width: 260px;
    height: 260px;
    margin: 0 auto;
  }

  .hero {
    padding-top: 100px;
  }

  .cta-banner {
    padding: 56px 28px;
  }

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

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero h1 {
    font-size: 2.1rem;
  }

  .section {
    padding: 64px 0;
  }

  .cta-banner {
    padding: 48px 20px;
    border-radius: 24px;
  }

  .container {
    padding: 0 20px;
  }

  .header-inner {
    padding: 0 20px;
  }
}