/* =========================================================
   禁漫天堂在线 · 自由视界 设计系统
   Creative Direction: Warm Gradient Pop
   ========================================================= */

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

:root {
  --bg-cream: #FFFBF5;
  --bg-lavender: #F5F2FF;
  --bg-mint: #F0FAF7;
  --primary: #FF6B5B;
  --primary-dark: #E85C4D;
  --secondary: #7C5CFC;
  --tertiary: #2EC4B6;
  --accent: #FFC94D;
  --text-dark: #2D2A32;
  --text-light: #6F6F78;
  --white: #FFFFFF;
  --shadow: 0 12px 40px rgba(82, 63, 141, 0.08);
  --shadow-hover: 0 24px 60px rgba(82, 63, 141, 0.14);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --transition: all 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

body {
  font-family: system-ui, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-cream);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  /* 全局漂浮装饰 */
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: -180px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(44, 196, 182, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  bottom: -100px;
  left: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 107, 91, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}

::selection {
  background: rgba(255, 107, 91, 0.25);
  color: var(--text-dark);
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-cream);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 20px;
}

/* =========================================================
   核心布局
   ========================================================= */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-lavender);
}

/* =========================================================
   导航
   ========================================================= */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 251, 245, 0.72);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(45, 42, 50, 0.04);
  box-shadow: 0 6px 40px rgba(82, 63, 141, 0.04);
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--tertiary), transparent);
  opacity: 0.6;
}

.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: 1.25rem;
  text-decoration: none;
  color: var(--text-dark);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 6px 16px rgba(255, 107, 91, 0.3);
}

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

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

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s ease;
}

.main-nav a:not(.nav-cta):hover {
  color: var(--primary);
}

.main-nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  padding: 10px 24px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important;
  font-weight: 700;
  font-size: 0.88rem !important;
  box-shadow: 0 6px 20px rgba(124, 92, 252, 0.25);
  transition: var(--transition) !important;
  border: none;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 10px 30px rgba(124, 92, 252, 0.35);
}

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

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(124, 92, 252, 0.1);
  border: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--secondary);
  font-size: 1.3rem;
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  min-height: 75vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #FFF9F5 0%, #FFF0EA 50%, #F0EBFF 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 201, 77, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  right: -100px;
  top: -80px;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 196, 182, 0.15) 0%, transparent 70%);
  left: 8%;
  bottom: -30px;
  z-index: 0;
}

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

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  padding: 6px 18px;
  border-radius: 40px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 107, 91, 0.15);
  color: var(--primary);
  margin-bottom: 22px;
  box-shadow: 0 4px 16px rgba(255, 107, 91, 0.08);
}

.hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 22px;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--text-dark);
  text-shadow: 0 2px 20px rgba(255, 255, 255, 0.8);
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 540px;
  margin-bottom: 36px;
  line-height: 1.8;
}

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

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  z-index: 1;
}

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

/* =========================================================
   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: var(--transition);
  letter-spacing: 0.2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  box-shadow: 0 8px 28px rgba(124, 92, 252, 0.28);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 40px rgba(255, 107, 91, 0.3);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid rgba(45, 42, 50, 0.12);
  color: var(--text-dark);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(255, 255, 255, 0.95);
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(255, 107, 91, 0.12);
}

/* =========================================================
   标签 / 标题
   ========================================================= */

.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--secondary);
  background: rgba(124, 92, 252, 0.08);
  padding: 6px 16px;
  border-radius: 40px;
}

.section-title {
  font-size: 2.3rem;
  margin-bottom: 16px;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.5px;
  color: var(--text-dark);
}

.section-desc {
  max-width: 600px;
  color: var(--text-light);
  margin-bottom: 48px;
  font-size: 1.02rem;
  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;
  border: 1px solid rgba(45, 42, 50, 0.04);
  background: var(--white);
  box-shadow: 0 10px 36px rgba(82, 63, 141, 0.06);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--tertiary));
  opacity: 0;
  transition: opacity 0.4s ease;
}

.category-card:nth-child(1) {
  background: linear-gradient(150deg, #FFF1ED 0%, #FFFFFF 60%);
}

.category-card:nth-child(2) {
  background: linear-gradient(150deg, #EFEBFF 0%, #FFFFFF 60%);
}

.category-card:nth-child(3) {
  background: linear-gradient(150deg, #E8F9F5 0%, #FFFFFF 60%);
}

.category-card:nth-child(4) {
  background: linear-gradient(150deg, #FFF7E6 0%, #FFFFFF 60%);
}

.category-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-hover);
}

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 14px rgba(82, 63, 141, 0.08);
}

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

.category-card p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 18px;
}

.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: 12px;
  color: var(--secondary);
}

/* =========================================================
   特性块
   ========================================================= */

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

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

.feature-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 107, 91, 0.06), rgba(124, 92, 252, 0.08));
  border-radius: var(--radius-lg);
  z-index: 1;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

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

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

.feature-text .section-label {
  margin-bottom: 12px;
}

.feature-text h2 {
  font-size: 2.1rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.4px;
}

.feature-text > p {
  color: var(--text-light);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 28px;
}

.feature-list {
  list-style: none;
  font-size: 0.98rem;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 500;
}

.feature-list li::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(46, 196, 182, 0.12);
  color: var(--tertiary);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 800;
  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-lg);
  background: var(--white);
  border: 1px solid rgba(45, 42, 50, 0.04);
  box-shadow: 0 8px 30px rgba(82, 63, 141, 0.05);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 91, 0.06), transparent 70%);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -2px;
}

.stat-item:nth-child(2) .stat-number {
  background: linear-gradient(135deg, var(--tertiary) 0%, var(--secondary) 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(--accent) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.stat-label {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* =========================================================
   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: var(--white);
  border: 1px solid rgba(45, 42, 50, 0.04);
  box-shadow: 0 8px 30px rgba(82, 63, 141, 0.05);
  transition: var(--transition);
}

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

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, #F5F2FF, #FFF0EA);
  transition: transform 0.5s ease;
}

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

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

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* =========================================================
   FAQ
   ========================================================= */

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

.faq-item {
  border: 1px solid rgba(45, 42, 50, 0.06);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 20px rgba(82, 63, 141, 0.04);
  transition: box-shadow 0.3s ease;
}

.faq-item:hover {
  box-shadow: 0 8px 30px rgba(82, 63, 141, 0.08);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  color: var(--text-dark);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--secondary);
  transition: transform 0.3s ease;
  line-height: 1;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--text-light);
  font-size: 0.94rem;
  line-height: 1.7;
  border-top: 1px dashed rgba(45, 42, 50, 0.06);
  padding-top: 14px;
}

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

/* =========================================================
   CTA 横幅
   ========================================================= */

.cta-banner {
  padding: 68px 48px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #7C5CFC 0%, #FF6B5B 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(124, 92, 252, 0.28);
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -80px;
  right: -60px;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  bottom: -60px;
  left: -40px;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.8px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--secondary);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.18);
}

/* =========================================================
   页脚
   ========================================================= */

.site-footer {
  padding: 80px 0 32px;
  background: linear-gradient(160deg, #EAF7F2 0%, #F0FAF7 50%, #FFFBF5 100%);
  border-radius: 48px 48px 0 0;
  margin-top: 40px;
  position: relative;
  border-top: 1px solid rgba(46, 196, 182, 0.12);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--tertiary), var(--secondary), var(--primary));
  opacity: 0.3;
}

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

.footer-brand .logo-icon {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.7;
  max-width: 300px;
  margin-top: 14px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text-dark);
  letter-spacing: 0.5px;
}

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

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

.footer-col ul a {
  text-decoration: none;
  color: var(--text-light);
  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(45, 42, 50, 0.06);
  margin-top: 56px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* =========================================================
   工具类
   ========================================================= */

.text-accent {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 900;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--text-light);
  font-size: 0.98rem;
  line-height: 1.7;
}

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

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

/* =========================================================
   响应式
   ========================================================= */

@media (max-width: 992px) {
  .feature-block {
    gap: 40px;
  }
  .hero h1 {
    font-size: 2.6rem;
  }
  .cta-banner h2 {
    font-size: 2rem;
  }
  .stat-number {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .section {
    padding: 70px 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;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(255, 251, 245, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px 32px;
    border-bottom: 1px solid rgba(45, 42, 50, 0.06);
    box-shadow: 0 20px 60px rgba(82, 63, 141, 0.1);
    gap: 18px;
    align-items: flex-start;
    border-radius: 0 0 24px 24px;
    z-index: 999;
  }

  .main-nav a {
    font-size: 1.05rem;
    font-weight: 600;
    width: 100%;
    padding: 8px 0;
  }

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

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
    min-height: auto;
  }

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

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

  .cta-banner {
    padding: 48px 28px;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

  .hero h1 {
    font-size: 1.9rem;
    line-height: 1.25;
  }

  .feature-block {
    gap: 24px;
  }

  .stat-number {
    font-size: 1.9rem;
  }

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

  .cta-banner {
    padding: 36px 20px;
  }
}

/* =========================================================
   动画
   ========================================================= */

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.hero-image {
  animation: float 6s ease-in-out infinite;
}

@media (prefers-reduced-motion: no-preference) {
  .category-card:nth-child(1) .card-icon {
    animation: float 4s ease-in-out infinite;
  }
  .category-card:nth-child(2) .card-icon {
    animation: float 5s ease-in-out infinite 0.5s;
  }
  .category-card:nth-child(3) .card-icon {
    animation: float 4.5s ease-in-out infinite 1s;
  }
}