/*
  爱丽丝的摇篮 - 样式文件
  日式风格 | 移动端优先 | Core Web Vitals优化
*/

/* ========================================
   CSS变量定义
   ======================================== */
:root {
  /* 主题色彩 - 日式少女风格 */
  --color-primary: #FFB6C1; /* 粉色 */
  --color-primary-dark: #FF69B4;
  --color-primary-light: #FFE4E1;
  --color-secondary: #E6E6FA; /* 淡紫色 */
  --color-secondary-dark: #DDA0DD;
  --color-accent: #FFC0CB;
  
  /* 基础色彩 */
  --color-white: #FFFFFF;
  --color-black: #1A1A1A;
  --color-gray-50: #F9F9F9;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BDBDBD;
  --color-gray-600: #757575;
  --color-gray-800: #424242;
  
  /* 功能色彩 */
  --color-success: #4CAF50;
  --color-warning: #FF9800;
  --color-error: #F44336;
  --color-info: #2196F3;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-pink: 0 4px 20px rgba(255, 182, 193, 0.3);
  
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* 字体 */
  --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* 边框圆角 */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* 过渡动画 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 容器宽度 */
  --container-max-width: 1200px;
  --container-padding: 1rem;
}

/* ========================================
   重置和基础样式
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-black);
  background-color: var(--color-white);
  overflow-x: hidden;
  min-height: 100vh;
}

/* 无障碍跳转链接 */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-to-main:focus {
  top: 0;
}

/* 图片优化 */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 链接样式 */
a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-primary);
  outline: none;
}

/* 列表样式 */
ul,
ol {
  list-style: none;
}

/* 按钮重置 */
button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

/* ========================================
   容器和布局
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-top: var(--spacing-lg);
}

/* ========================================
   导航栏
   ======================================== */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  padding: var(--spacing-md) 0;
}

.nav-wrapper {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--color-primary-dark);
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: scale(1.05);
}

.logo img {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pink);
}

.logo-text {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-primary-dark);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 500;
  color: var(--color-gray-800);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--color-primary);
  transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-primary-dark);
}

.nav-link:hover::before {
  transform: translateX(-50%) scaleX(1);
}

.nav-cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white) !important;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-pink);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 600px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #FFF0F5 0%, #F0E6FF 100%);
  padding: var(--spacing-3xl) var(--container-padding);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 182, 193, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(230, 230, 250, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(5deg); }
}

.hero-content {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  animation: slideInLeft 1s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-title {
  margin-bottom: var(--spacing-lg);
}

.title-main {
  display: block;
  font-size: var(--font-size-5xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

.title-sub {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 400;
  color: var(--color-gray-600);
  letter-spacing: 2px;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

.hero-image {
  animation: slideInRight 1s ease-out;
  position: relative;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-image img {
  width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-base);
}

.hero-image:hover img {
  transform: scale(1.02);
}

/* ========================================
   游戏介绍区域
   ======================================== */
.game-intro {
  background: var(--color-white);
}

.content-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
}

.content-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.content-block.reverse {
  direction: rtl;
}

.content-block.reverse > * {
  direction: ltr;
}

.content-text {
  padding: var(--spacing-lg);
}

.content-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-left: var(--spacing-md);
}

.content-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 80%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
}

.content-text p {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-800);
  line-height: 1.8;
}

.content-text strong {
  color: var(--color-primary-dark);
  font-weight: 600;
}

.feature-list {
  list-style: none;
  margin-top: var(--spacing-lg);
}

.feature-list li {
  padding: var(--spacing-sm) 0;
  padding-left: var(--spacing-xl);
  position: relative;
  color: var(--color-gray-800);
  line-height: 1.8;
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary-dark);
  font-weight: bold;
  font-size: var(--font-size-lg);
}

.content-image {
  position: relative;
}

.content-image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base);
}

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

/* 图片懒加载占位 */
.lazy-image {
  background: linear-gradient(90deg, var(--color-gray-100) 25%, var(--color-gray-200) 50%, var(--color-gray-100) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.lazy-image.loaded {
  animation: none;
  background: none;
}

/* ========================================
   游戏特色区域
   ======================================== */
.game-features {
  background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.feature-card {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

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

.feature-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-md);
}

.feature-description {
  color: var(--color-gray-800);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.feature-image {
  margin-top: var(--spacing-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-image img {
  transition: transform var(--transition-slow);
}

.feature-card:hover .feature-image img {
  transform: scale(1.1);
}

/* ========================================
   游戏攻略区域
   ======================================== */
.game-guide {
  background: var(--color-white);
}

.guide-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
}

.guide-section {
  background: var(--color-gray-50);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  border-left: 4px solid var(--color-primary);
}

.guide-section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.guide-icon {
  font-size: var(--font-size-3xl);
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.tip-card {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.tip-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tip-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-sm);
}

.tip-card p {
  color: var(--color-gray-800);
  line-height: 1.8;
}

/* BOSS攻略卡片 */
.boss-guide {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.boss-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.boss-card:hover {
  box-shadow: var(--shadow-lg);
}

.boss-name {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin: 0;
}

.boss-info {
  padding: var(--spacing-xl);
}

.boss-intro {
  font-size: var(--font-size-lg);
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary-dark);
}

.boss-details h5 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-black);
  margin: var(--spacing-lg) 0 var(--spacing-md) 0;
}

.skill-list,
.strategy-steps,
.exploration-steps {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

.skill-list li,
.strategy-steps li,
.exploration-steps li {
  color: var(--color-gray-800);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
  position: relative;
}

.skill-list {
  list-style: disc;
}

.strategy-steps,
.exploration-steps {
  list-style: decimal;
}

.boss-tip,
.exploration-tip {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: linear-gradient(135deg, rgba(255, 182, 193, 0.1), rgba(230, 230, 250, 0.1));
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary-dark);
}

.boss-tip strong,
.exploration-tip strong {
  color: var(--color-primary-dark);
}

/* 状态效果卡片 */
.status-guide {
  display: grid;
  gap: var(--spacing-lg);
}

.status-card {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.status-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-error);
  margin-bottom: var(--spacing-md);
}

.status-card p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
  color: var(--color-gray-800);
}

.status-card strong {
  color: var(--color-black);
  font-weight: 600;
}

/* ========================================
   游戏亮点区域
   ======================================== */
.game-highlights {
  background: linear-gradient(135deg, #FFF5F7 0%, #F5F0FF 100%);
}

.highlights-grid {
  display: grid;
  gap: var(--spacing-2xl);
}

.highlight-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-md);
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.highlight-item:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-xl);
}

.highlight-number {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.highlight-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-md);
}

.highlight-description {
  color: var(--color-gray-800);
  line-height: 1.8;
}

/* ========================================
   FAQ区域
   ======================================== */
.faq-section {
  background: var(--color-white);
}

.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-primary);
}

.faq-item[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-pink);
}

.faq-question {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: all var(--transition-base);
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:hover {
  background: var(--color-primary-light);
}

.faq-icon {
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
}

.faq-arrow {
  margin-left: auto;
  transition: transform var(--transition-base);
  color: var(--color-primary-dark);
}

.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--spacing-xl) var(--spacing-xl) var(--spacing-xl);
  color: var(--color-gray-800);
  line-height: 1.8;
}

.faq-answer p {
  margin-bottom: var(--spacing-md);
}

.faq-answer ol,
.faq-answer ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

.faq-answer ol {
  list-style: decimal;
}

.faq-answer ul {
  list-style: disc;
}

.faq-answer li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-800);
  line-height: 1.8;
}

.faq-answer strong {
  color: var(--color-primary-dark);
  font-weight: 600;
}

/* ========================================
   下载区域
   ======================================== */
.download-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.download-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.download-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.download-description {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.download-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.download-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
}

.feature-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  font-weight: bold;
}

.btn-download {
  background: var(--color-white);
  color: var(--color-primary-dark);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-base);
}

.btn-download:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.download-note {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.download-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* ========================================
   友情链接
   ======================================== */
.friends-links {
  background: var(--color-gray-50);
  padding: var(--spacing-2xl) 0;
}

.friends-title {
  text-align: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: var(--spacing-xl);
}

.friends-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

.friend-link {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  color: var(--color-gray-800);
  font-weight: 500;
  transition: all var(--transition-base);
}

.friend-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-pink);
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: linear-gradient(180deg, var(--color-gray-800) 0%, var(--color-black) 100%);
  color: var(--color-gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.footer-description {
  line-height: 1.8;
  color: var(--color-gray-400);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-keywords span {
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(255, 182, 193, 0.1);
  border: 1px solid rgba(255, 182, 193, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.copyright {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-sm);
}

.copyright a {
  color: var(--color-gray-400);
  text-decoration: underline;
}

.copyright a:hover {
  color: var(--color-primary);
}

.footer-seo-text {
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
}

/* ========================================
   返回顶部按钮
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* ========================================
   响应式设计 - 平板
   ======================================== */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }

  .hero-content,
  .content-block,
  .download-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .content-block.reverse {
    direction: ltr;
  }

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

/* ========================================
   响应式设计 - 移动端
   ======================================== */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --spacing-3xl: 2.5rem;
    --spacing-2xl: 2rem;
    --container-padding: 1rem;
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  /* 移动端导航 */
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--spacing-2xl);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    left: 0;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

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

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .nav-link {
    padding: var(--spacing-md);
    width: 100%;
    text-align: center;
    font-size: var(--font-size-lg);
  }

  /* Hero区域 */
  .hero {
    min-height: auto;
    padding: var(--spacing-2xl) var(--container-padding);
  }

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

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

  /* 特色卡片 */
  .features-grid {
    grid-template-columns: 1fr;
  }

  /* 攻略提示 */
  .tips-grid {
    grid-template-columns: 1fr;
  }

  /* 游戏亮点 */
  .highlight-item {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .highlight-number {
    justify-self: center;
  }

  /* FAQ */
  .faq-question {
    font-size: var(--font-size-base);
    padding: var(--spacing-md);
  }

  .faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
  }

  /* 下载区域 */
  .download-features {
    grid-template-columns: 1fr;
  }

  /* 页脚 */
  .footer-content {
    grid-template-columns: 1fr;
  }

  /* 返回顶部 */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}

/* ========================================
   打印样式
   ======================================== */
@media print {
  .header,
  .hero-buttons,
  .nav-menu,
  .mobile-menu-toggle,
  .back-to-top,
  .download-section,
  .friends-links {
    display: none;
  }

  body {
    font-size: 12pt;
    color: black;
    background: white;
  }

  .section {
    page-break-inside: avoid;
  }

  a {
    text-decoration: underline;
    color: black;
  }
}

/* ========================================
   动画优化 - 尊重用户偏好
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   高对比度模式支持
   ======================================== */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #FF1493;
    --color-primary-dark: #C71585;
  }

  .btn,
  .feature-card,
  .boss-card {
    border: 2px solid currentColor;
  }
}

/* ========================================
   暗黑模式支持
   ======================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-white: #1A1A1A;
    --color-black: #FFFFFF;
    --color-gray-50: #2A2A2A;
    --color-gray-100: #333333;
    --color-gray-200: #424242;
    --color-gray-300: #616161;
    --color-gray-800: #E0E0E0;
  }

  body {
    background: #1A1A1A;
    color: #FFFFFF;
  }

  .header {
    background: rgba(26, 26, 26, 0.95);
  }

  .hero {
    background: linear-gradient(135deg, #2A2A2A 0%, #333333 100%);
  }

  .feature-card,
  .boss-card,
  .tip-card,
  .highlight-item {
    background: #2A2A2A;
    color: #E0E0E0;
  }
}