/* ================================================
   吃瓜天堂 — 夏日瓜果派对视觉系统
   ================================================ */

:root {
  --melon-red: #FF6B6B;
  --melon-red-deep: #FF4757;
  --melon-green: #2ECC71;
  --melon-green-dark: #27AE60;
  --melon-yellow: #FFE66D;
  --melon-peach: #FFD8A8;
  --cream-bg: #FFFAF0;
  --mint-bg: #F2FFF9;
  --ink: #2D3436;
  --ink-soft: rgba(45, 52, 54, 0.7);
  --border-pink: #FFE1E1;
  --shadow-soft: 0 8px 30px rgba(255, 107, 107, 0.08);
  --shadow-hover: 0 12px 36px rgba(255, 107, 107, 0.16);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
}

/* ---- 基础重置 ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--cream-bg);
  background-image:
    radial-gradient(rgba(255, 107, 107, 0.04) 1.5px, transparent 1.5px),
    radial-gradient(rgba(46, 204, 113, 0.04) 1.5px, transparent 1.5px);
  background-size: 32px 32px, 48px 48px;
  background-position: 0 0, 16px 16px;
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--melon-red), var(--melon-green));
  border-radius: 10px;
}

/* ---- 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: var(--mint-bg);
}

.section::before {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 24px solid rgba(255, 230, 109, 0.08);
  top: 24px;
  left: -30px;
  pointer-events: none;
}

.section:nth-child(even)::before {
  border-color: rgba(255, 107, 107, 0.06);
  left: auto;
  right: -30px;
}

/* ---- 导航 ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 250, 240, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 2px solid rgba(255, 225, 225, 0.6);
  box-shadow: 0 2px 24px rgba(255, 107, 107, 0.04);
}

.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: 900;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: 0.02em;
  transition: transform 0.2s ease;
}

.logo:hover {
  transform: scale(1.03);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--melon-red), var(--melon-red-deep));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.35);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  top: 6px;
  left: 8px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  padding: 8px 16px;
  border-radius: 24px;
  transition: all 0.25s ease;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 3px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 3px;
  border-radius: 2px;
  background: var(--melon-red);
  transition: transform 0.25s ease;
}

.main-nav a:hover {
  color: var(--melon-red);
  background: rgba(255, 107, 107, 0.06);
}

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

.nav-cta {
  padding: 10px 24px !important;
  background: linear-gradient(135deg, var(--melon-green), var(--melon-green-dark));
  color: #fff !important;
  border-radius: 24px !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 14px rgba(46, 204, 113, 0.35);
  transition: all 0.25s ease !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(46, 204, 113, 0.45);
  color: #fff !important;
  background: linear-gradient(135deg, var(--melon-green-dark), var(--melon-green));
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 2px solid var(--border-pink);
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-toggle.open span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.open span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ---- Hero ---- */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.1), transparent 70%);
  top: -120px;
  right: -100px;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 204, 113, 0.1), transparent 70%);
  bottom: 10%;
  left: -120px;
  pointer-events: none;
}

.hero-content {
  max-width: 760px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--melon-red), var(--melon-red-deep));
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: 1px;
  box-shadow: 0 4px 16px rgba(255, 107, 107, 0.35);
  transform: rotate(-1.5deg);
}

.hero-eyebrow::before {
  content: '🍉';
  font-size: 0.9rem;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
}

.hero h1::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 12px;
  background: var(--melon-yellow);
  opacity: 0.4;
  z-index: -1;
  border-radius: 4px;
}

.hero h1 .text-accent-red {
  color: var(--melon-red);
  position: relative;
}

.hero h1 .text-accent-green {
  color: var(--melon-green-dark);
  position: relative;
}

.hero p {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 580px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  position: relative;
  border: 4px solid #fff;
  transform: rotate(2deg);
  transition: transform 0.3s ease;
}

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

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

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 32px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.02em;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--melon-red), var(--melon-red-deep));
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 107, 107, 0.5);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--melon-green);
  color: var(--melon-green-dark);
}

.btn-outline:hover {
  background: var(--melon-green);
  color: #fff;
  box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
  transform: translateY(-2px);
}

/* ---- 标签/标题 ---- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--melon-red);
  background: rgba(255, 107, 107, 0.08);
  padding: 6px 16px;
  border-radius: 24px;
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--melon-red);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 18px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  position: relative;
}

.section-desc {
  max-width: 620px;
  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(--radius-lg);
  padding: 32px 28px;
  background: #fff;
  border: 2px solid var(--border-pink);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, transparent, rgba(255, 107, 107, 0.05));
  border-radius: 0 0 0 80px;
  transition: width 0.3s ease, height 0.3s ease;
}

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

.category-card:hover::before {
  width: 120px;
  height: 120px;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--melon-red), var(--melon-peach));
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.2);
}

.category-card:nth-child(2) .card-icon {
  background: linear-gradient(135deg, var(--melon-green), #55E6C1);
  box-shadow: 0 4px 12px rgba(46, 204, 113, 0.2);
}

.category-card:nth-child(3) .card-icon {
  background: linear-gradient(135deg, #FFD93D, var(--melon-peach));
  box-shadow: 0 4px 12px rgba(255, 217, 61, 0.3);
}

.category-card:nth-child(4) .card-icon {
  background: linear-gradient(135deg, #74B9FF, #A29BFE);
  box-shadow: 0 4px 12px rgba(116, 185, 255, 0.3);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.category-card p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-bottom: 20px;
  line-height: 1.6;
}

.card-link {
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--melon-red);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

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

/* ---- 特性块 ---- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin: 40px 0;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-soft);
  border: 4px solid #fff;
}

.feature-image::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.06), transparent);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.feature-image:hover img {
  transform: scale(1.03);
}

.feature-text {
  padding: 20px 0;
}

.feature-text .section-label {
  margin-bottom: 14px;
}

.feature-text .section-title {
  margin-bottom: 16px;
}

.feature-text > p {
  color: var(--ink-soft);
  margin-bottom: 28px;
  line-height: 1.7;
}

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

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  font-size: 1rem;
  border-bottom: 1px dashed rgba(255, 107, 107, 0.15);
}

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

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  color: var(--melon-green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(46, 204, 113, 0.12);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* ---- 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(--radius-lg);
  background: #fff;
  border: 2px solid var(--border-pink);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 4px;
  background: linear-gradient(90deg, var(--melon-red), var(--melon-green));
  border-radius: 0 0 4px 4px;
  transition: width 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.stat-item:hover::before {
  width: 80px;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--melon-red);
  line-height: 1.1;
  font-family: 'Georgia', serif;
  letter-spacing: 0.02em;
}

.stat-label {
  font-size: 0.92rem;
  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(--radius-lg);
  overflow: hidden;
  background: #fff;
  border: 2px solid var(--border-pink);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-6px) rotate(0.5deg);
  box-shadow: var(--shadow-hover);
  border-color: var(--melon-red);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.04);
}

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

.content-wall-body .content-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(255, 107, 107, 0.1);
  color: var(--melon-red);
  margin-bottom: 12px;
}

.content-wall-body .content-tag:nth-child(2) {
  background: rgba(46, 204, 113, 0.1);
  color: var(--melon-green-dark);
}

.content-wall-body h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

/* ---- FAQ ---- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 2px solid var(--border-pink);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--melon-red);
  box-shadow: var(--shadow-soft);
}

.faq-item.open {
  border-color: var(--melon-green);
  box-shadow: var(--shadow-soft);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.02rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: transparent;
  transition: background 0.2s ease;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--melon-red);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  line-height: 1;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: 0.95rem;
}

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

@keyframes fadeInDown {
  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(--radius-lg);
  background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 50%, #FFB347 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(255, 107, 107, 0.35);
}

.cta-banner::before {
  content: '🍉';
  position: absolute;
  font-size: 8rem;
  opacity: 0.08;
  top: -20px;
  right: 20px;
  transform: rotate(30deg);
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 32px solid rgba(255, 255, 255, 0.06);
  bottom: -80px;
  left: -40px;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  letter-spacing: -0.01em;
}

.cta-banner p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.9);
  max-width: 520px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--melon-red);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
}

/* ---- 页脚 ---- */
.site-footer {
  padding: 72px 0 32px;
  background: linear-gradient(160deg, #E8F8F0 0%, #D4F2E4 100%);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '🍉';
  position: absolute;
  font-size: 10rem;
  opacity: 0.04;
  bottom: -30px;
  left: -20px;
  transform: rotate(-20deg);
}

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

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 18px;
  color: var(--ink);
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 3px;
  background: linear-gradient(90deg, var(--melon-red), var(--melon-green));
  border-radius: 2px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

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

.footer-col ul a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul a::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--melon-red);
  opacity: 0.4;
  transition: opacity 0.2s ease;
}

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

.footer-col ul a:hover::before {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(45, 52, 54, 0.1);
  margin-top: 32px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
  position: relative;
  z-index: 1;
}

/* ---- 工具类 ---- */
.text-accent {
  color: var(--melon-red);
  font-weight: 800;
}

.text-accent-green {
  color: var(--melon-green-dark);
  font-weight: 800;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 56px;
  color: var(--ink-soft);
  line-height: 1.8;
  font-size: 1.02rem;
}

.text-center .section-title {
  margin-left: auto;
  margin-right: auto;
}

.text-center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

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

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

/* 辅助的瓜瓜图标 */
.watermelon-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--melon-red);
  margin: 0 4px;
}

.watermelon-dot.green {
  background: var(--melon-green);
}

/* ---- 响应式：平板 ---- */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .feature-block {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .feature-block {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--cream-bg);
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border-bottom: 2px solid var(--border-pink);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.06);
  }

  .main-nav.open {
    display: flex;
    animation: fadeInDown 0.3s ease;
  }

  .main-nav a {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
  }

  .main-nav a::after {
    display: none;
  }

  .nav-cta {
    margin-top: 8px;
    text-align: center;
    width: 100%;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

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

@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;
  }

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

  .stat-number {
    font-size: 2rem;
  }
}

/* ---- 打印样式（华丽小彩蛋） ---- */
@media print {
  .site-header {
    position: static;
    background: #fff;
    box-shadow: none;
  }

  .hero {
    min-height: auto;
    padding: 32px 0;
  }

  .btn,
  .menu-toggle,
  .nav-cta {
    display: none;
  }

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