```css
/* ============================================================
   51吃瓜群众 | Melon Juice Design System
   Awwwards Style — Watermelon Fresh, Pink & Green on Cream
   Domain: 51cgqz.com.cn
   ============================================================ */

:root {
  --melon-pink: #FF5C72;
  --melon-deep: #FF3B5C;
  --melon-green: #2E8E5A;
  --melon-mint: #7BC5A0;
  --melon-cream: #FFF9F2;
  --melon-yellow: #FFD54A;
  --melon-blush: #FFE8EE;
  --text-primary: #2D2424;
  --text-soft: #6B5D5D;
  --card-line: rgba(46, 142, 90, 0.08);
  --pink-line: rgba(255, 92, 114, 0.2);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--melon-cream);
  background-image: radial-gradient(rgba(46, 142, 90, 0.055) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

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

.section:nth-child(even) {
  background: #FDF0EA;
}

/* ========== 导航栏 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 242, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 2px solid rgba(46, 142, 90, 0.12);
  transition: box-shadow 0.35s ease;
}

.site-header:hover {
  box-shadow: 0 4px 24px rgba(255, 92, 114, 0.06);
}

.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(--text-primary);
  letter-spacing: -0.5px;
  transition: transform 0.25s ease;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #FF8FA3, var(--melon-pink) 55%, var(--melon-deep));
  border: 3px solid var(--melon-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  position: relative;
  box-shadow: 0 2px 12px rgba(255, 92, 114, 0.25);
}

.logo-icon::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(45, 36, 36, 0.5);
  box-shadow: -6px -4px 0 rgba(45, 36, 36, 0.4),
               6px -3px 0 rgba(45, 36, 36, 0.35),
               0 4px 0 rgba(45, 36, 36, 0.45);
}

.logo span:last-of-type {
  background: linear-gradient(135deg, var(--melon-pink), var(--melon-deep));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: #4A3F3F;
  transition: color 0.25s ease;
  position: relative;
  padding: 4px 2px;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--melon-pink), var(--melon-mint));
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  padding: 9px 22px;
  border-radius: 24px;
  color: #fff !important;
  font-weight: 600;
  background: linear-gradient(135deg, var(--melon-green), #3BAE75);
  box-shadow: 0 2px 12px rgba(46, 142, 90, 0.28);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 142, 90, 0.35);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.7rem;
  cursor: pointer;
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  transition: background 0.2s;
}

.menu-toggle:hover {
  background: rgba(255, 92, 114, 0.1);
}

/* ========== Hero 区域 ========== */
.hero {
  min-height: 78vh;
  display: flex;
  align-items: center;
  background: linear-gradient(170deg, var(--melon-cream) 0%, #FDEBE9 60%, #EDF7F0 100%);
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '🍉';
  position: absolute;
  right: 7%;
  top: 18%;
  font-size: 7rem;
  opacity: 0.13;
  animation: melon-float 7s ease-in-out infinite;
  z-index: 1;
  pointer-events: none;
}

.hero::after {
  content: '🍉';
  position: absolute;
  left: 4%;
  bottom: 12%;
  font-size: 4rem;
  opacity: 0.09;
  animation: melon-float 9s ease-in-out infinite reverse;
  z-index: 1;
  pointer-events: none;
}

@keyframes melon-float {
  0%, 100% { transform: translateY(0) rotate(0deg) scale(1); }
  50% { transform: translateY(-14px) rotate(6deg) scale(1.04); }
}

.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: 24px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(255, 92, 114, 0.1), rgba(46, 142, 90, 0.08));
  color: var(--melon-deep);
  border: 1.5px solid rgba(255, 92, 114, 0.18);
  letter-spacing: 0.5px;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: 3.9rem;
  font-weight: 900;
  line-height: 1.12;
  margin-bottom: 22px;
  letter-spacing: -2.5px;
  color: var(--text-primary);
  text-shadow: 0 4px 24px rgba(255, 92, 114, 0.07);
}

.hero h1::after {
  content: ' 🍉';
  display: inline-block;
  font-size: 3rem;
  transform-origin: center bottom;
  animation: bounce-emoji 3s ease-in-out infinite;
}

@keyframes bounce-emoji {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  30% { transform: translateY(-6px) rotate(8deg); }
  60% { transform: translateY(2px) rotate(-4deg); }
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.62;
  max-width: 560px;
  margin-bottom: 36px;
  color: var(--text-soft);
  line-height: 1.7;
  font-weight: 400;
}

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

.hero-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(255, 92, 114, 0.12);
  position: relative;
  z-index: 2;
  border: 3px solid rgba(255, 255, 255, 0.6);
}

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

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 32px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.95rem;
  letter-spacing: 0.2px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25), transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.4s ease;
}

.btn:hover::before {
  transform: translateX(0);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--melon-pink), var(--melon-deep));
  box-shadow: 0 4px 20px rgba(255, 92, 114, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(255, 92, 114, 0.4);
}

.btn-primary:active {
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--melon-green);
  color: #fff;
  border-color: var(--melon-green);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(46, 142, 90, 0.25);
}

/* ========== 标题 / 标签 ========== */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 14px;
  color: var(--melon-pink);
  text-transform: uppercase;
  position: relative;
  padding-left: 26px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--melon-green) 0%, var(--melon-green) 25%, transparent 25%, transparent 50%, var(--melon-pink) 50%, var(--melon-pink) 75%, transparent 75%);
  animation: spin-soft 8s linear infinite;
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -1.5px;
  line-height: 1.2;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 48px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--melon-pink), var(--melon-yellow), var(--melon-green));
}

.section-desc {
  max-width: 600px;
  opacity: 0.65;
  margin-bottom: 44px;
  color: var(--text-soft);
  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: 22px;
  padding: 32px 28px;
  background: #fff;
  border: 2px solid var(--card-line);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 0;
  background: linear-gradient(180deg, rgba(255, 92, 114, 0.04), rgba(46, 142, 90, 0.03), transparent);
  transition: height 0.4s ease;
  z-index: 0;
}

.category-card::after {
  content: '🍉';
  position: absolute;
  bottom: -12px;
  right: -8px;
  font-size: 2.4rem;
  opacity: 0;
  transform: rotate(-14deg);
  transition: all 0.4s ease;
  pointer-events: none;
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--pink-line);
  box-shadow: 0 14px 40px rgba(255, 92, 114, 0.12);
}

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

.category-card:hover::after {
  opacity: 0.12;
  transform: rotate(0deg) translateY(-4px);
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--melon-blush), #FFF3DC);
  position: relative;
  z-index: 1;
  box-shadow: 0 2px 8px rgba(255, 92, 114, 0.08);
  transition: transform 0.3s ease;
}

.category-card:hover .card-icon {
  transform: scale(1.08) rotate(-5deg);
}

.category-card h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.category-card p {
  font-size: 0.88rem;
  color: var(--text-soft);
  margin-bottom: 16px;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.card-link {
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--melon-pink);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  position: relative;
  z-index: 1;
  transition: gap 0.25s ease, color 0.25s ease;
}

.card-link::after {
  content: '→';
  font-size: 1.1rem;
}

.card-link:hover {
  gap: 10px;
  color: var(--melon-deep);
}

/* ========== 特性块 ========== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(46, 142, 90, 0.1);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 30%;
  background: linear-gradient(transparent, rgba(46, 142, 90, 0.06));
  border-radius: 0 0 24px 24px;
}

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

.feature-text h3 {
  font-size: 1.9rem;
  margin-bottom: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.3;
  color: var(--text-primary);
}

.feature-text p {
  margin-bottom: 18px;
  opacity: 0.7;
  color: var(--text-soft);
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 9px 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '🍉';
  font-size: 1.05rem;
  display: inline-block;
  transform-origin: center;
  transition: transform 0.25s ease;
  flex-shrink: 0;
  line-height: 1.3;
}

.feature-list li:hover::before {
  transform: rotate(-15deg) scale(1.15);
}

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

.stat-item {
  padding: 32px 24px 28px;
  border-radius: 24px;
  background: #fff;
  border: 2px solid var(--card-line);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 4px;
  border-radius: 0 0 8px 8px;
  background: linear-gradient(90deg, var(--melon-pink), var(--melon-yellow), var(--melon-green));
  opacity: 0;
  transition: width 0.3s ease, opacity 0.3s ease;
}

.stat-item:nth-child(2) {
  background: linear-gradient(180deg, #FFF8F4, #fff 60%);
}

.stat-item:nth-child(3) {
  background: linear-gradient(180deg, #F0F9F3, #fff 60%);
}

.stat-item:nth-child(4) {
  background: linear-gradient(180deg, #FFF9E8, #fff 60%);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(255, 92, 114, 0.1);
  border-color: var(--pink-line);
}

.stat-item:hover::before {
  width: 64px;
  opacity: 1;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--melon-pink);
  line-height: 1.25;
  letter-spacing: -2px;
  display: inline-block;
  position: relative;
}

.stat-item:nth-child(2) .stat-number {
  color: var(--melon-green);
}

.stat-item:nth-child(3) .stat-number {
  color: #E8A020;
}

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

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  color: var(--text-soft);
  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: 22px;
  overflow: hidden;
  border: 2px solid var(--card-line);
  background: #fff;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.content-wall-item::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 22px;
  box-shadow: inset 0 0 0 2px transparent;
  transition: box-shadow 0.35s ease;
  pointer-events: none;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 40px rgba(46, 142, 90, 0.12);
  border-color: rgba(46, 142, 90, 0.2);
}

.content-wall-item:hover::after {
  box-shadow: inset 0 0 0 2px rgba(255, 92, 114, 0.1);
}

.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(1.04);
}

.content-wall-body {
  padding: 22px 22px 24px;
}

.content-wall-body .content-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
  background: var(--melon-blush);
  color: var(--melon-deep);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.content-wall-body h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.86rem;
  color: var(--text-soft);
  opacity: 0.7;
  line-height: 1.6;
}

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

.faq-item {
  border: 2px solid var(--card-line);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 92, 114, 0.25);
  box-shadow: 0 4px 16px rgba(255, 92, 114, 0.06);
}

.faq-item.open {
  border-color: rgba(255, 92, 114, 0.3);
  box-shadow: 0 6px 20px rgba(255, 92, 114, 0.08);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  gap: 16px;
  letter-spacing: 0.2px;
  transition: color 0.25s ease;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--melon-pink);
  font-weight: 500;
  transition: all 0.35s ease;
  flex-shrink: 0;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.7;
  color: var(--text-soft);
  line-height: 1.7;
  font-size: 0.93rem;
}

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

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

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

/* ========== CTA 横幅 ========== */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: 28px;
  color: #fff;
  background: linear-gradient(135deg, var(--melon-pink) 0%, var(--melon-deep) 40%, var(--melon-green) 100%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 92, 114, 0.25);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.18) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -30px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(255, 213, 74, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -1px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 480px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--melon-deep);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary::before {
  background: linear-gradient(135deg, rgba(255, 92, 114, 0.15), transparent 60%);
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

/* ========== 页脚 ========== */
.site-footer {
  padding: 64px 0 32px;
  background: linear-gradient(180deg, var(--melon-green), #1F6B44);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: repeating-linear-gradient(
    -45deg,
    var(--melon-pink) 0, var(--melon-pink) 14px,
    var(--melon-yellow) 14px, var(--melon-yellow) 28px,
    var(--melon-cream) 28px, var(--melon-cream) 42px,
    var(--melon-green) 42px, var(--melon-green) 56px
  );
  opacity: 0.85;
}

.site-footer::after {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand p {
  opacity: 0.75;
  margin-top: 14px;
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 260px;
}

.footer-brand .logo-icon {
  background: radial-gradient(circle at 35% 35%, #FF8FA3, var(--melon-deep));
  border-color: #7BC5A0;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  font-weight: 700;
  position: relative;
  padding-bottom: 10px;
  letter-spacing: 0.5px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 3px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--melon-pink), var(--melon-yellow));
}

.footer-col a {
  display: block;
  padding: 5px 0;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease, padding-left 0.2s ease, transform 0.2s ease;
}

.footer-col a:hover {
  color: var(--melon-yellow);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
  line-height: 1.6;
}

/* ========== 工具类 ========== */
.text-accent {
  color: var(--melon-pink);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--text-soft);
  line-height: 1.7;
}

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

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

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 3rem;
  }

  .section {
    padding: 72px 0;
  }
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .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: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 249, 242, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 20px 24px 28px;
    box-shadow: 0 16px 40px rgba(45, 36, 36, 0.1);
    border-bottom: 2px solid rgba(46, 142, 90, 0.12);
    gap: 4px;
  }

  .main-nav.open a {
    padding: 12px 0;
    font-size: 1rem;
    border-bottom: 1px solid rgba(46, 142, 90, 0.06);
    width: 100%;
  }

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

  .main-nav.open .nav-cta {
    margin-top: 12px;
    text-align: center;
    border-bottom: none;
  }

  .hero {
    min-height: 85vh;
    padding-top: 80px;
  }

  .hero h1 {
    font-size: 2.6rem;
    letter-spacing: -1.5px;
  }

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

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

  .section-title {
    font-size: 2rem;
  }

  .cta-banner h2 {
    font-size: 1.7rem;
  }

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

@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 {
    justify-content: center;
    width: 100%;
  }

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

  .hero h1::after {
    font-size: 2rem;
  }

  .hero::before {
    font-size: 4rem;
    opacity: 0.1;
  }

  .hero::after {
    font-size: 2.5rem;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 1.7rem;
  }

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

  .feature-text h3 {
    font-size: 1.5rem;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }

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