/* ============================================================
   吃瓜网51 · 鲜瓜季设计系统
   Fresh Melon Season Design System
   吃瓜天堂 — 网罗鲜瓜，51不重样
   ============================================================ */

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

:root {
  --melon: #FF5A5F;
  --melon-deep: #E9435A;
  --melon-coral: #FF7A6E;
  --melon-skin: #2EC4B6;
  --melon-skin-deep: #1BA390;
  --melon-gold: #FFD166;
  --melon-cream: #FFF9F2;
  --melon-pink-light: #FFE8E8;
  --melon-mint-light: #E6F7F5;
  --melon-yellow-light: #FFF4E0;
  --ink: #2D3436;
  --ink-soft: #636E72;
  --ink-light: #B2BEC3;
  --white: #FFFFFF;
  --shadow-1: 0 4px 20px rgba(255, 90, 95, 0.08);
  --shadow-2: 0 12px 40px rgba(255, 90, 95, 0.14);
  --shadow-3: 0 24px 64px rgba(255, 90, 95, 0.22);
  --radius-sm: 14px;
  --radius-md: 24px;
  --radius-lg: 36px;
  --radius-full: 999px;
  --font-display: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* ── 基础重置 ── */
body {
  font-family: var(--font-body);
  background: var(--melon-cream);
  color: var(--ink);
  overflow-x: hidden;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(46, 196, 182, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 90, 95, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

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

::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: var(--melon-cream);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--melon), var(--melon-coral));
  border-radius: 4px;
}

/* ── 核心布局 ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

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

.section:nth-child(even) {
  background: linear-gradient(180deg, var(--melon-pink-light) 0%, rgba(255, 255, 255, 0) 100%);
}

/* ── 导航 ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 242, 0.88);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid rgba(255, 90, 95, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.32rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--melon) 0%, var(--melon-coral) 100%);
  box-shadow: 0 4px 14px rgba(255, 90, 95, 0.35);
  position: relative;
  color: #fff;
}

.logo-icon::after {
  content: '🍉';
  font-size: 1rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: all 0.3s ease;
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--melon), var(--melon-gold));
  border-radius: 2px;
  transition: width 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}

.main-nav a:hover {
  color: var(--melon);
}
.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 26px !important;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--melon) 0%, var(--melon-coral) 100%);
  color: #fff !important;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(255, 90, 95, 0.3);
  transition: all 0.3s !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 90, 95, 0.45);
  color: #fff !important;
}

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

.menu-toggle {
  display: none;
  background: var(--melon-pink-light);
  border: none;
  cursor: pointer;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: 0.3s;
}

.menu-toggle:hover {
  background: var(--melon);
}
.menu-toggle::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  box-shadow: 0 -6px 0 var(--ink), 0 6px 0 var(--ink);
  transition: all 0.2s;
}

/* ── 首页 Hero ── */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, var(--melon-cream) 0%, var(--melon-pink-light) 45%, var(--melon-mint-light) 100%);
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -160px;
  right: -120px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(255, 90, 95, 0.10) 0%, transparent 70%);
  border-radius: 50%;
  animation: hero-pulse 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -60px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(46, 196, 182, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  animation: hero-pulse 10s ease-in-out infinite reverse;
}

@keyframes hero-pulse {
  0%, 100% { transform: scale(1) translateY(0); }
  50% { transform: scale(1.08) translateY(-15px); }
}

.hero-content {
  max-width: 760px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: 22px;
  background: rgba(255, 90, 95, 0.12);
  color: var(--melon-deep);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.12;
  margin-bottom: 24px;
  font-weight: 900;
  letter-spacing: -2px;
  background: linear-gradient(120deg, var(--ink) 30%, var(--melon) 60%, var(--melon-skin) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.16rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.85;
}

.hero-buttons {
  display: flex;
  gap: 14px;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-3);
}

.hero-image::before {
  content: '🍉';
  position: absolute;
  top: -24px;
  right: -16px;
  font-size: 90px;
  z-index: 2;
  animation: float-melon 6s ease-in-out infinite;
  filter: drop-shadow(0 8px 20px rgba(255, 90, 95, 0.3));
}

@keyframes float-melon {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-18px) rotate(8deg); }
}

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

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: var(--font-body);
  font-size: 0.95rem;
  letter-spacing: 0.2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--melon) 0%, var(--melon-coral) 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 90, 95, 0.35);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: left 0.55s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(255, 90, 95, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.5);
  border: 2px solid var(--melon);
  color: var(--melon);
}

.btn-outline:hover {
  background: rgba(255, 90, 95, 0.08);
  border-color: var(--melon-deep);
  color: var(--melon-deep);
  transform: translateY(-2px);
}

/* ── 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-skin-deep);
  text-transform: uppercase;
  padding: 6px 18px;
  background: var(--melon-mint-light);
  border-radius: var(--radius-full);
}

.section-title {
  font-size: 2.6rem;
  margin-bottom: 16px;
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.2;
}

.section-desc {
  max-width: 640px;
  opacity: 0.75;
  margin-bottom: 46px;
  font-size: 1.06rem;
  line-height: 1.8;
}

/* ── 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-md);
  padding: 34px 30px;
  border: 1px solid rgba(255, 90, 95, 0.08);
  background: var(--white);
  transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--melon), var(--melon-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s ease;
}

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

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2);
  border-color: rgba(255, 90, 95, 0.15);
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--melon-pink-light), var(--melon-mint-light));
  position: relative;
  transition: transform 0.3s ease;
}

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

.category-card:nth-child(1) .card-icon {
  background: linear-gradient(135deg, #FFE4E4, #FFCDD2);
}
.category-card:nth-child(2) .card-icon {
  background: linear-gradient(135deg, #D6F5EF, #B2EBE2);
}
.category-card:nth-child(3) .card-icon {
  background: linear-gradient(135deg, #FFEFD6, #FFE0B2);
}
.category-card:nth-child(4) .card-icon {
  background: linear-gradient(135deg, #EDE7FF, #D6CCFF);
}

.card-link {
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--melon);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.3s ease;
}

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

/* ── 特性块 ── */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 68px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-2);
}

.feature-image::before {
  content: '';
  position: absolute;
  top: -40px;
  left: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(255, 209, 102, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
  pointer-events: none;
}

.feature-image::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 35%;
  background: linear-gradient(to top, rgba(255, 90, 95, 0.1), transparent);
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
}

.feature-block:hover .feature-image img {
  transform: scale(1.04);
}

.feature-text h2 {
  font-size: 2.2rem;
  margin-bottom: 18px;
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.3;
}

.feature-text p {
  opacity: 0.75;
  line-height: 1.8;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
  margin-top: 16px;
}

.feature-list li {
  padding: 12px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 500;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  font-size: 0.98rem;
}

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

.feature-list li::before {
  content: '🍉';
  font-weight: 700;
  font-size: 1.15rem;
  flex-shrink: 0;
}

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

.stat-item {
  padding: 36px 24px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 90, 95, 0.08);
  background: var(--white);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--melon), var(--melon-skin));
  border-radius: 3px;
  transition: width 0.4s ease;
}

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

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-1);
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--melon) 0%, var(--melon-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  display: block;
}

.stat-item:nth-child(2) .stat-number {
  background: linear-gradient(135deg, var(--melon-skin) 0%, #48DBFB 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item:nth-child(3) .stat-number {
  background: linear-gradient(135deg, var(--melon-gold) 0%, #FFB347 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item:nth-child(4) .stat-number {
  background: linear-gradient(135deg, #A29BFE 0%, #6C5CE7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.92rem;
  opacity: 0.65;
  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-md);
  overflow: hidden;
  border: 1px solid rgba(255, 90, 95, 0.06);
  background: var(--white);
  transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-wall-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

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

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.65;
  line-height: 1.7;
}

/* ── FAQ ── */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(255, 90, 95, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 90, 95, 0.22);
  box-shadow: var(--shadow-1);
}

.faq-item.open {
  border-color: rgba(255, 90, 95, 0.3);
  box-shadow: var(--shadow-2);
}

.faq-item .faq-question {
  padding: 22px 28px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  color: var(--ink);
  transition: color 0.3s;
  line-height: 1.4;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--melon);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  margin-left: 16px;
  line-height: 1;
}

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

.faq-item .faq-answer {
  padding: 0 28px 24px;
  display: none;
  opacity: 0.75;
  line-height: 1.85;
  border-top: 1px solid rgba(0, 0, 0, 0.03);
  padding-top: 18px;
  font-size: 0.95rem;
}

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

/* ── CTA 横幅 ── */
.cta-banner {
  padding: 76px 40px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--melon) 0%, var(--melon-coral) 45%, var(--melon-gold) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-3);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 220px;
  height: 220px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -50px;
  left: 12%;
  width: 140px;
  height: 140px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.cta-banner h2 {
  color: #fff !important;
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
  letter-spacing: -1px;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  z-index: 1;
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--melon);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
  font-size: 1rem;
}

.cta-banner .btn-primary::before {
  background: linear-gradient(90deg, transparent, rgba(255, 90, 95, 0.1), transparent);
}

.cta-banner .btn-primary:hover {
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.25);
  transform: translateY(-4px) scale(1.02);
}

/* ── 页脚 ── */
.site-footer {
  padding: 72px 0 28px;
  background: var(--melon-cream);
  border-top: 1px solid rgba(255, 90, 95, 0.08);
  position: relative;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

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

.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: linear-gradient(120deg, var(--ink), var(--melon));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.footer-brand p {
  opacity: 0.68;
  font-size: 0.92rem;
  line-height: 1.75;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--ink);
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  transition: all 0.25s;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 90, 95, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-light);
}

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

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

.seo-description {
  max-width: 640px;
  margin: 0 auto 52px;
  opacity: 0.72;
  line-height: 1.85;
  font-size: 1.02rem;
}

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

/* ── 响应式 ── */
@media (max-width: 900px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero h1 {
    font-size: 2.6rem;
  }
  .section-title {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }
  .hero {
    min-height: auto;
    padding-top: 110px;
    padding-bottom: 60px;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero p {
    font-size: 1.05rem;
  }
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-item {
    padding: 24px 16px;
  }
  .stat-number {
    font-size: 2.4rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 249, 242, 0.98);
    backdrop-filter: blur(24px);
    padding: 28px;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 90, 95, 0.1);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.06);
  }
  .main-nav a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }
  .main-nav a::after {
    display: none;
  }
  .main-nav a:hover {
    background: var(--melon-pink-light);
  }
  .nav-cta {
    margin-top: 8px;
    text-align: center;
    justify-content: center;
    display: block;
  }
  .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);
    padding: 28px;
  }
  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 56px 0;
  }
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero h1 {
    font-size: 1.85rem;
    letter-spacing: -1px;
  }
  .hero p {
    font-size: 0.98rem;
  }
  .section-title {
    font-size: 1.7rem;
  }
  .cta-banner {
    padding: 48px 24px;
    border-radius: var(--radius-md);
  }
  .cta-banner h2 {
    font-size: 1.7rem;
  }
  .stat-number {
    font-size: 2rem;
  }
  .logo {
    font-size: 1.1rem;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }
  .header-inner {
    padding: 0 18px;
  }
  .container {
    padding: 0 18px;
  }
}

/* ── 装饰动画 ── */
@keyframes hero-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@keyframes card-float-in {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}