/* ==================== CSS 变量 ==================== */
:root {
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --bg-dark: #0a0e27;
  --bg-mid: #1a1a2e;
  --bg-light: #16213e;
  --text-white: #ffffff;
  --text-gray: rgba(255, 255, 255, 0.7);
  --shadow-glow: rgba(102, 126, 234, 0.4);
  --shadow-glow-hover: rgba(102, 126, 234, 0.6);
}

/* ==================== CSS Reset 和基础样式 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', sans-serif;
  color: var(--text-white);
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 50%, var(--bg-light) 100%);
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 性能优化 */
@media (max-width: 768px) {
  * {
    -webkit-tap-highlight-color: transparent;
  }
}

/* ==================== 固定顶部导航栏 ==================== */
.top-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.header-container {
  max-width: 100%;
  height: 100%;
  margin: 0;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo 样式 */
.header-logo {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-left: 40px;
}

.header-logo img {
  height: 50px;
  width: auto;
  filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.5));
  transition: transform 0.3s ease;
}

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

.header-logo-text {
  font-size: 20px;
  font-weight: bold;
  color: var(--text-white);
  white-space: nowrap;
  text-shadow: 0 2px 10px rgba(102, 126, 234, 0.5);
}

/* 社交媒体图标区域 */
.header-social {
  display: flex;
  align-items: center;
  gap: 35px;
  margin-right: 60px;
}

.social-item {
  position: relative;
  cursor: pointer;
}

.social-link {
  text-decoration: none;
}

.social-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.social-icon img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  object-position: center;
  transition: all 0.3s ease;
}

.social-icon svg {
  width: 40px;
  height: 40px;
  color: #fff;
  transition: all 0.3s ease;
}

.social-item:hover .social-icon {
  transform: translateY(-3px) scale(1.1);
}

.social-item:hover .social-icon img {
  filter: brightness(1.2) drop-shadow(0 4px 8px rgba(102, 126, 234, 0.6));
}

.social-item:hover .social-icon svg {
  color: var(--primary-color);
  filter: drop-shadow(0 4px 8px rgba(102, 126, 234, 0.6));
}

/* 二维码弹出层 */
.qrcode-popup {
  position: absolute;
  top: calc(100% + 20px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(15px);
  border: 2px solid rgba(102, 126, 234, 0.5);
  border-radius: 12px;
  padding: 20px;
  min-width: 200px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
  z-index: 10;
}

.qrcode-popup::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 10px solid rgba(102, 126, 234, 0.5);
}

.social-item:hover .qrcode-popup {
  opacity: 1;
  visibility: visible;
  top: calc(100% + 15px);
}

.qrcode-popup img {
  width: 160px;
  height: 160px;
  border-radius: 8px;
  margin-bottom: 12px;
  background: white;
  padding: 8px;
}

.qrcode-popup p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 14px;
  margin: 0;
  font-weight: 500;
}

/* 提示文本弹出层 */
.tooltip-popup {
  position: absolute;
  top: calc(100% + 20px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(15px);
  border: 2px solid rgba(102, 126, 234, 0.5);
  border-radius: 12px;
  padding: 12px 16px;
  min-width: 200px;
  max-width: 250px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
  z-index: 10;
  white-space: normal;
}

.tooltip-popup::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 10px solid rgba(102, 126, 234, 0.5);
}

.social-link:hover .tooltip-popup {
  opacity: 1;
  visibility: visible;
  top: calc(100% + 15px);
}

.tooltip-popup p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 13px;
  margin: 0;
  line-height: 1.5;
}

/* ==================== 容器 ==================== */
.container {
  position: relative;
  z-index: 1;
  padding-top: 70px; /* 为固定 header 留出空间 */
}

/* ==================== 超级炫酷背景动画系统 ==================== */
.space-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  will-change: auto;
}

/* 多层星空系统 */
.stars-layer {
  position: absolute;
  width: 100%;
  height: 100%;
  background-repeat: repeat;
}

.layer-1 {
  background-image: 
    radial-gradient(1px 1px at 10% 20%, white, transparent),
    radial-gradient(1px 1px at 30% 40%, white, transparent),
    radial-gradient(1px 1px at 50% 10%, white, transparent),
    radial-gradient(1px 1px at 70% 60%, white, transparent),
    radial-gradient(1px 1px at 90% 30%, white, transparent),
    radial-gradient(1px 1px at 20% 80%, white, transparent),
    radial-gradient(1px 1px at 60% 90%, white, transparent),
    radial-gradient(1px 1px at 80% 50%, white, transparent);
  background-size: 200px 200px;
  animation: starFloat1 60s linear infinite, starTwinkle1 3s ease-in-out infinite;
  opacity: 0.8;
}

.layer-2 {
  background-image: 
    radial-gradient(2px 2px at 15% 25%, rgba(102, 126, 234, 0.8), transparent),
    radial-gradient(2px 2px at 45% 55%, rgba(118, 75, 162, 0.8), transparent),
    radial-gradient(2px 2px at 75% 15%, rgba(240, 147, 251, 0.8), transparent),
    radial-gradient(2px 2px at 25% 75%, rgba(102, 126, 234, 0.8), transparent),
    radial-gradient(2px 2px at 85% 85%, rgba(118, 75, 162, 0.8), transparent);
  background-size: 300px 300px;
  animation: starFloat2 80s linear infinite, starTwinkle2 4s ease-in-out infinite;
  opacity: 0.6;
}

.layer-3 {
  background-image: 
    radial-gradient(3px 3px at 20% 30%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(3px 3px at 60% 70%, rgba(255, 255, 255, 0.9), transparent),
    radial-gradient(3px 3px at 40% 50%, rgba(255, 255, 255, 0.9), transparent);
  background-size: 400px 400px;
  animation: starFloat3 100s linear infinite, starPulse 5s ease-in-out infinite;
  opacity: 0.7;
}

.layer-4 {
  background-image: 
    radial-gradient(1.5px 1.5px at 35% 45%, rgba(102, 126, 234, 0.6), transparent),
    radial-gradient(1.5px 1.5px at 65% 25%, rgba(240, 147, 251, 0.6), transparent),
    radial-gradient(1.5px 1.5px at 55% 85%, rgba(118, 75, 162, 0.6), transparent);
  background-size: 250px 250px;
  animation: starFloat4 70s linear infinite reverse, starTwinkle3 6s ease-in-out infinite;
  opacity: 0.5;
}

@keyframes starFloat1 {
  from { transform: translate(0, 0); }
  to { transform: translate(-200px, -200px); }
}

@keyframes starFloat2 {
  from { transform: translate(0, 0); }
  to { transform: translate(300px, -300px); }
}

@keyframes starFloat3 {
  from { transform: translate(0, 0); }
  to { transform: translate(-400px, 400px); }
}

@keyframes starFloat4 {
  from { transform: translate(0, 0); }
  to { transform: translate(250px, 250px); }
}

@keyframes starTwinkle1 {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

@keyframes starTwinkle2 {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.9; }
}

@keyframes starTwinkle3 {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

@keyframes starPulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* 动态星云效果 */
.nebula {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  mix-blend-mode: screen;
  will-change: transform, opacity;
}

.nebula-1 {
  width: 600px;
  height: 600px;
  top: 10%;
  left: 10%;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.3) 0%, transparent 70%);
  animation: nebulaFloat1 25s ease-in-out infinite, nebulaPulse1 8s ease-in-out infinite;
}

.nebula-2 {
  width: 800px;
  height: 800px;
  top: 50%;
  right: 10%;
  background: radial-gradient(circle, rgba(118, 75, 162, 0.25) 0%, transparent 70%);
  animation: nebulaFloat2 30s ease-in-out infinite, nebulaPulse2 10s ease-in-out infinite;
}

.nebula-3 {
  width: 500px;
  height: 500px;
  bottom: 15%;
  left: 40%;
  background: radial-gradient(circle, rgba(240, 147, 251, 0.2) 0%, transparent 70%);
  animation: nebulaFloat3 20s ease-in-out infinite, nebulaPulse3 12s ease-in-out infinite;
}

@keyframes nebulaFloat1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  33% { transform: translate(50px, -30px) rotate(120deg) scale(1.1); }
  66% { transform: translate(-30px, 50px) rotate(240deg) scale(0.9); }
}

@keyframes nebulaFloat2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  50% { transform: translate(-60px, 40px) rotate(180deg) scale(1.15); }
}

@keyframes nebulaFloat3 {
  0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
  33% { transform: translate(-40px, -50px) rotate(-120deg) scale(1.05); }
  66% { transform: translate(40px, 30px) rotate(-240deg) scale(0.95); }
}

@keyframes nebulaPulse1 {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.9; }
}

@keyframes nebulaPulse2 {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

@keyframes nebulaPulse3 {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.7; }
}

/* 流星效果 - 稀疏、自然 */
.meteor {
  position: absolute;
  width: 2px;
  height: 2px;
  background: radial-gradient(circle, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0.8) 50%, transparent 100%);
  border-radius: 50%;
  opacity: 0;
  filter: blur(0.5px);
}

/* 流星拖尾 - 更细长自然 */
.meteor::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 100%;
  width: 100px;
  height: 1px;
  background: linear-gradient(to left, 
    rgba(255, 255, 255, 0.9) 0%, 
    rgba(255, 255, 255, 0.6) 30%, 
    rgba(255, 255, 255, 0.3) 60%, 
    transparent 100%);
  transform: translateY(-50%);
  box-shadow: 0 0 4px rgba(255, 255, 255, 0.5);
}

/* 流星头部发光 */
.meteor::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  filter: blur(2px);
}

/* 4颗流星，间隔很长 */
.meteor-1 {
  top: 8%;
  left: 20%;
  animation: meteorFall1 2s linear infinite 0s;
}

.meteor-2 {
  top: 15%;
  left: 60%;
  animation: meteorFall2 2.2s linear infinite 12s;
}

.meteor-3 {
  top: 25%;
  left: 40%;
  animation: meteorFall3 2.5s linear infinite 25s;
}

.meteor-4 {
  top: 12%;
  left: 80%;
  animation: meteorFall4 2.3s linear infinite 38s;
}

/* 流星动画 - 快速划过 */
@keyframes meteorFall1 {
  0% { 
    transform: translate(0, 0) rotate(-45deg); 
    opacity: 0; 
  }
  3% { 
    opacity: 1; 
  }
  100% { 
    transform: translate(-600px, 600px) rotate(-45deg); 
    opacity: 0; 
  }
}

@keyframes meteorFall2 {
  0% { 
    transform: translate(0, 0) rotate(-48deg); 
    opacity: 0; 
  }
  3% { 
    opacity: 1; 
  }
  100% { 
    transform: translate(-650px, 680px) rotate(-48deg); 
    opacity: 0; 
  }
}

@keyframes meteorFall3 {
  0% { 
    transform: translate(0, 0) rotate(-42deg); 
    opacity: 0; 
  }
  3% { 
    opacity: 1; 
  }
  100% { 
    transform: translate(-700px, 700px) rotate(-42deg); 
    opacity: 0; 
  }
}

@keyframes meteorFall4 {
  0% { 
    transform: translate(0, 0) rotate(-46deg); 
    opacity: 0; 
  }
  3% { 
    opacity: 1; 
  }
  100% { 
    transform: translate(-620px, 640px) rotate(-46deg); 
    opacity: 0; 
  }
}

/* 能量波纹效果 */
.energy-wave {
  position: absolute;
  width: 300px;
  height: 300px;
  border: 2px solid rgba(102, 126, 234, 0.3);
  border-radius: 50%;
  opacity: 0;
}

.wave-1 {
  top: 20%;
  left: 15%;
  animation: waveExpand 6s ease-out infinite;
}

.wave-2 {
  top: 60%;
  right: 20%;
  animation: waveExpand 6s ease-out infinite 2s;
}

.wave-3 {
  bottom: 25%;
  left: 50%;
  animation: waveExpand 6s ease-out infinite 4s;
}

@keyframes waveExpand {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  100% {
    transform: scale(3);
    opacity: 0;
  }
}

/* 光束扫描效果 */
.light-scan {
  position: absolute;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom,
    transparent 0%,
    rgba(102, 126, 234, 0.4) 20%,
    rgba(118, 75, 162, 0.6) 50%,
    rgba(102, 126, 234, 0.4) 80%,
    transparent 100%);
  filter: blur(3px);
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

.scan-1 {
  left: 20%;
  animation: scanMove1 12s ease-in-out infinite;
}

.scan-2 {
  right: 30%;
  animation: scanMove2 15s ease-in-out infinite 3s;
}

@keyframes scanMove1 {
  0%, 100% { transform: translateX(0) rotate(10deg); opacity: 0.3; }
  50% { transform: translateX(200px) rotate(-10deg); opacity: 0.7; }
}

@keyframes scanMove2 {
  0%, 100% { transform: translateX(0) rotate(-15deg); opacity: 0.4; }
  50% { transform: translateX(-200px) rotate(15deg); opacity: 0.8; }
}

/* 粒子场效果 */
.particle-field {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(1px 1px at 10% 10%, rgba(102, 126, 234, 0.4), transparent),
    radial-gradient(1px 1px at 30% 20%, rgba(118, 75, 162, 0.4), transparent),
    radial-gradient(1px 1px at 50% 30%, rgba(240, 147, 251, 0.4), transparent),
    radial-gradient(1px 1px at 70% 40%, rgba(102, 126, 234, 0.4), transparent),
    radial-gradient(1px 1px at 20% 60%, rgba(118, 75, 162, 0.4), transparent),
    radial-gradient(1px 1px at 40% 70%, rgba(240, 147, 251, 0.4), transparent),
    radial-gradient(1px 1px at 60% 80%, rgba(102, 126, 234, 0.4), transparent),
    radial-gradient(1px 1px at 80% 90%, rgba(118, 75, 162, 0.4), transparent);
  background-size: 100% 100%;
  animation: particleDrift 50s linear infinite;
  opacity: 0.6;
}

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

/* 脉冲光环效果 */
.pulse-ring {
  position: absolute;
  border-radius: 50%;
  border: 3px solid rgba(102, 126, 234, 0.5);
  box-shadow: 0 0 30px rgba(102, 126, 234, 0.6), inset 0 0 30px rgba(102, 126, 234, 0.4);
  opacity: 0;
}

.ring-1 {
  width: 200px;
  height: 200px;
  top: 30%;
  left: 25%;
  animation: ringPulse 5s ease-out infinite;
}

.ring-2 {
  width: 250px;
  height: 250px;
  top: 55%;
  right: 30%;
  border-color: rgba(118, 75, 162, 0.5);
  box-shadow: 0 0 30px rgba(118, 75, 162, 0.6), inset 0 0 30px rgba(118, 75, 162, 0.4);
  animation: ringPulse 5s ease-out infinite 1.5s;
}

.ring-3 {
  width: 180px;
  height: 180px;
  bottom: 20%;
  left: 60%;
  border-color: rgba(240, 147, 251, 0.5);
  box-shadow: 0 0 30px rgba(240, 147, 251, 0.6), inset 0 0 30px rgba(240, 147, 251, 0.4);
  animation: ringPulse 5s ease-out infinite 3s;
}

@keyframes ringPulse {
  0% {
    transform: scale(0.5) rotate(0deg);
    opacity: 0;
  }
  20% {
    opacity: 0.8;
  }
  100% {
    transform: scale(2) rotate(180deg);
    opacity: 0;
  }
}

/* 星系旋转效果 */
.galaxy {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center,
    rgba(102, 126, 234, 0.1) 0%,
    rgba(118, 75, 162, 0.15) 30%,
    rgba(240, 147, 251, 0.1) 60%,
    transparent 100%);
  filter: blur(40px);
  opacity: 0.5;
}

.galaxy-1 {
  top: 15%;
  right: 15%;
  animation: galaxyRotate1 40s linear infinite;
}

.galaxy-2 {
  bottom: 20%;
  left: 20%;
  animation: galaxyRotate2 50s linear infinite reverse;
}

@keyframes galaxyRotate1 {
  from { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.2); }
  to { transform: rotate(360deg) scale(1); }
}

@keyframes galaxyRotate2 {
  from { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.15); }
  to { transform: rotate(360deg) scale(1); }
}

/* 能量线条效果 */
.energy-lines {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(90deg, transparent 0%, rgba(102, 126, 234, 0.1) 50%, transparent 100%),
    linear-gradient(0deg, transparent 0%, rgba(118, 75, 162, 0.1) 50%, transparent 100%);
  background-size: 200% 200%;
  animation: linesFlow 20s linear infinite;
  opacity: 0.3;
}

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

/* ==================== Hero 区域 ==================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  z-index: 1;
  overflow: hidden;
}

/* 视频背景层 */
.hero-video-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  object-fit: cover;
  opacity: 0.6;
}

/* 半透明蒙层 */
.hero-video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.hero-content {
  position: relative;
  max-width: 1000px;
  width: 100%;
  z-index: 3;
  padding: 0 20px;
}

/* Logo 样式 大小调整 */
.logo {
  max-width: 650px;
  width: 100%;
  height: auto;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.5));
  animation: logoGlow 3s infinite ease-in-out;
  will-change: filter;
}

@keyframes logoGlow {
  0%, 100% {
    filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.5));
  }
  50% {
    filter: drop-shadow(0 0 30px rgba(102, 126, 234, 0.8));
  }
}

/* 主标题样式 */
.hero h1 {
  font-size: 64px;
  font-weight: bold;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(102, 126, 234, 0.3);
  letter-spacing: 2px;
}

/* 副标题样式 */
.subtitle {
  font-size: 48px;
  color: var(--text-gray);
  margin-bottom: 100px;
  letter-spacing: 2px;
  line-height: 1.6;
  font-weight: 500;
}

/* 下载容器 */
.download-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

/* 下载按钮容器 */
.download-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 0;
  width: 100%;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* ==================== 下载按钮样式 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 20px;
  margin: 10px;
  color: var(--text-white);
  text-decoration: none;
  border-radius: 12px;
  font-size: 18px;
  font-weight: bold;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: none;
  min-width: 200px;
  width: 200px;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.4s ease;
  z-index: 1;
}

.btn-icon-img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  transition: transform 0.4s ease;
  z-index: 1;
}

.btn span {
  z-index: 1;
}

.btn:hover .btn-icon,
.btn:hover .btn-icon-img {
  transform: scale(1.2) rotate(5deg);
}

/* PC 按钮 - 蓝紫色渐变 */
.btn-pc {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.btn-pc:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(102, 126, 234, 0.6);
}

/* PC 绿色版按钮 - 青色渐变 */
.btn-pc-portable {
  background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  box-shadow: 0 4px 20px rgba(79, 172, 254, 0.4);
}

.btn-pc-portable:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(79, 172, 254, 0.6);
}

/* Android 按钮 - 绿色渐变 */
.btn-android {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  box-shadow: 0 4px 20px rgba(17, 153, 142, 0.4);
}

.btn-android:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(17, 153, 142, 0.6);
}

/* iOS 按钮 - 灰色渐变 */
.btn-ios {
  background: linear-gradient(135deg, #434343 0%, #000000 100%);
  box-shadow: 0 4px 20px rgba(67, 67, 67, 0.4);
}

.btn-ios:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(67, 67, 67, 0.6);
}

/* 更多下载按钮 */
.btn-more-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  margin: 10px auto;
  color: rgba(255, 255, 255, 0.8);
  background: transparent;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-more-toggle:hover {
  color: var(--text-white);
  transform: translateY(-2px);
}

.btn-more-toggle.active .arrow-icon {
  transform: rotate(180deg);
}

.arrow-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

/* 更多下载按钮容器 */
.more-download-buttons {
  display: grid;
  grid-template-columns: repeat(3, 220px);
  gap: 20px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all 0.5s ease;
  margin: 0 auto;
  width: 100%;
  max-width: 900px;
  justify-content: center;
}

.more-download-buttons.expanded {
  max-height: 500px;
  opacity: 1;
  margin: 20px auto;
}

/* 华为按钮 - 红色渐变 */
.btn-huawei {
  background: linear-gradient(135deg, #c8102e 0%, #e60012 100%);
  box-shadow: 0 4px 20px rgba(200, 16, 46, 0.4);
}

.btn-huawei:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(200, 16, 46, 0.6);
}

/* 小米按钮 - 橙色渐变 */
.btn-xiaomi {
  background: linear-gradient(135deg, #ff6700 0%, #ff8533 100%);
  box-shadow: 0 4px 20px rgba(255, 103, 0, 0.4);
}

.btn-xiaomi:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(255, 103, 0, 0.6);
}

/* VIVO按钮 - 蓝色渐变 */
.btn-vivo {
  background: linear-gradient(135deg, #0066cc 0%, #0088ff 100%);
  box-shadow: 0 4px 20px rgba(0, 102, 204, 0.4);
}

.btn-vivo:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(0, 102, 204, 0.6);
}

/* bilibili按钮 - 粉色渐变 */
.btn-bilibili {
  background: linear-gradient(135deg, #fb7299 0%, #ff8eb3 100%);
  box-shadow: 0 4px 20px rgba(251, 114, 153, 0.4);
}

.btn-bilibili:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(251, 114, 153, 0.6);
}

/* 好游按钮 - 紫色渐变 */
.btn-haoyou {
  background: linear-gradient(135deg, #9c27b0 0%, #ba68c8 100%);
  box-shadow: 0 4px 20px rgba(156, 39, 176, 0.4);
}

.btn-haoyou:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 30px rgba(156, 39, 176, 0.6);
}

/* ==================== 游戏简介区域 ==================== */
.game-intro {
  max-width: 800px;
  margin: 80px auto;
  padding: 40px 20px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.game-intro h2 {
  font-size: 36px;
  margin-bottom: 30px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.game-intro p {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-gray);
}

.intro-text {
  text-align: justify;
  text-justify: inter-character;
  text-indent: 2em;
}

.features-title {
  font-size: 24px;
  font-weight: bold;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 40px;
  margin-bottom: 30px;
  text-align: center;
}

.features-grid {
  display: flex;
  flex-direction: column;
  gap: 25px;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 100px;
}

.feature-item {
  text-align: left;
}

.feature-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.feature-icon {
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
}

.feature-heading {
  font-size: 18px;
  font-weight: bold;
  color: rgba(255, 255, 255, 0.95);
  margin: 0;
  line-height: 1.2;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  padding-left: 38px;
}

.feature-list li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-gray);
  padding-left: 15px;
  position: relative;
  margin-bottom: 6px;
}

.feature-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--text-gray);
  font-size: 16px;
}

/* ==================== 游戏截图区域 ==================== */
.screenshots {
  max-width: 1200px;
  margin: 80px auto;
  padding: 40px 20px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.screenshots h2 {
  font-size: 36px;
  margin-bottom: 50px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.screenshot-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.screenshot-grid img {
  width: 300px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  will-change: transform;
}

.screenshot-grid img:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 30px rgba(102, 126, 234, 0.6);
}

/* 图片放大查看模态框 */
.image-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}



.modal-prev,
.modal-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 60px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10000;
  padding: 20px;
  user-select: none;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 5px;
}

.modal-prev {
  left: 30px;
}

.modal-next {
  right: 30px;
}

.modal-prev:hover,
.modal-next:hover {
  color: var(--primary-color);
  background: rgba(0, 0, 0, 0.8);
  transform: translateY(-50%) scale(1.1);
}

/* 平板及以下设备隐藏箭头 */
@media (max-width: 1024px) {
  .modal-prev,
  .modal-next {
    display: none;
  }
}

.modal-content {
  max-width: 90%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 0 50px rgba(102, 126, 234, 0.5);
  animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-caption {
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
  margin-top: 20px;
  text-align: center;
  padding: 10px 20px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 8px;
  backdrop-filter: blur(10px);
}

/* ==================== 底部信息区域 ==================== */
.footer {
  margin-top: 60px;
  padding: 40px 20px;
  text-align: center;
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin: 10px 0;
  line-height: 1.8;
}

.health-advisory-title {
  font-size: 16px;
  font-weight: bold;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 15px;
}

.health-advisory {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin: 0 auto 20px auto;
  padding: 0;
  text-align: center !important;
  white-space: nowrap;
}

.publication-info {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin: 8px 0;
  line-height: 1.6;
}

.filing-info {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 15px;
}

.filing-info a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color 0.3s ease;
}

.filing-info a:hover {
  color: rgba(102, 126, 234, 0.9);
  text-decoration: underline;
}

.copyright {
  margin-bottom: 5px;
}

.contact {
  margin-top: 5px;
}

/* ==================== 响应式设计 ==================== */
/* 平板设备 */
@media (max-width: 768px) {
  /* Header 响应式 */
  .top-header {
    height: 60px;
  }
  
  .header-container {
    padding: 0 25px;
  }
  
  .header-logo {
    margin-left: 30px;
  }
  
  .header-logo img {
    height: 42px;
  }
  
  .header-logo-text {
    font-size: 18px;
  }
  
  .header-social {
    gap: 25px;
    margin-right: 40px;
  }
  
  .social-icon {
    width: 36px;
    height: 36px;
  }
  
  .social-icon img,
  .social-icon svg {
    width: 36px;
    height: 36px;
  }
  
  .qrcode-popup {
    min-width: 170px;
    padding: 15px;
  }
  
  .qrcode-popup img {
    width: 140px;
    height: 140px;
  }
  
  .qrcode-popup p {
    font-size: 13px;
  }
  
  .container {
    padding-top: 60px;
  }
  
  /* Hero 区域 */
  .hero h1 {
    font-size: 48px;
  }
  
  .subtitle {
    font-size: 36px;
  }
  
  .logo {
    max-width: 450px;
    margin-bottom: 40px;
  }
  
  .subtitle {
    margin-bottom: 60px;
  }
  
  /* 下载按钮垂直堆叠 */
  .download-buttons {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }
  
  .btn {
    width: 80%;
    max-width: 300px;
    min-width: auto;
    margin: 10px 0;
  }
  
  .btn-more-toggle {
    width: auto;
    padding: 10px 20px;
  }
  
  .more-download-buttons {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    justify-items: center;
  }
  
  .btn-icon {
    width: 20px;
    height: 20px;
  }
  
  /* 游戏简介 */
  .game-intro h2,
  .screenshots h2 {
    font-size: 28px;
  }
  
  .game-intro p {
    font-size: 16px;
  }
  
  .features-title {
    font-size: 20px;
    margin-top: 30px;
  }
  
  .features-grid {
    gap: 20px;
    padding-left: 80px;
  }
  
  .feature-icon {
    font-size: 20px;
  }
  
  .feature-heading {
    font-size: 17px;
  }
  
  .feature-list {
    padding-left: 34px;
  }
  
  .feature-list li {
    font-size: 15px;
  }
  
  /* 截图单列显示 */
  .screenshot-grid img {
    width: 90%;
    max-width: 400px;
  }
  
  .modal-caption {
    font-size: 16px;
  }
}

/* 手机设备 */
@media (max-width: 480px) {
  /* Header 手机适配 */
  .top-header {
    height: 55px;
  }
  
  .header-container {
    padding: 0 15px;
  }
  
  .header-logo {
    margin-left: 20px;
  }
  
  .header-logo img {
    height: 36px;
  }
  
  .header-logo-text {
    font-size: 16px;
  }
  
  .header-social {
    gap: 18px;
    margin-right: 30px;
  }
  
  .social-icon {
    width: 32px;
    height: 32px;
  }
  
  .social-icon img,
  .social-icon svg {
    height: 32px;
    max-width: 32px;
  }
  
  .qrcode-popup {
    min-width: 150px;
    padding: 12px;
  }
  
  .qrcode-popup img {
    width: 120px;
    height: 120px;
  }
  
  .qrcode-popup p {
    font-size: 12px;
  }
  
  .container {
    padding-top: 55px;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .subtitle {
    font-size: 28px;
  }
  
  .logo {
    max-width: 360px;
    margin-bottom: 30px;
  }
  
  .subtitle {
    margin-bottom: 50px;
  }
  
  .btn {
    width: 65%;
    max-width: 260px;
    min-width: auto;
    padding: 14px 28px;
    font-size: 16px;
    gap: 10px;
  }
  
  .btn-icon {
    width: 18px;
    height: 18px;
  }
  
  .btn-more-toggle {
    width: auto;
    padding: 8px 16px;
    font-size: 14px;
  }
  
  .arrow-icon {
    width: 18px;
    height: 18px;
  }
  
  .more-download-buttons {
    grid-template-columns: 1fr;
    gap: 10px;
    justify-items: center;
  }
  
  .btn-icon-img {
    width: 18px;
    height: 18px;
  }
  
  .game-intro,
  .screenshots {
    margin: 60px auto;
    padding: 30px 15px;
  }
  
  .game-intro h2,
  .screenshots h2 {
    font-size: 24px;
    margin-bottom: 20px;
  }
  
  .game-intro p {
    font-size: 15px;
    line-height: 1.6;
  }
  
  .features-title {
    font-size: 18px;
    margin-top: 25px;
  }
  
  .features-grid {
    gap: 18px;
    max-width: 100%;
    padding-left: 20px;
  }
  
  .feature-icon {
    font-size: 18px;
  }
  
  .feature-heading {
    font-size: 16px;
  }
  
  .feature-list {
    padding-left: 32px;
  }
  
  .feature-list li {
    font-size: 14px;
    line-height: 1.8;
  }
  
  .screenshot-grid {
    gap: 15px;
  }
  
  .screenshot-grid img {
    width: 95%;
  }
  
  .modal-content {
    max-width: 95%;
    max-height: 80vh;
  }
  
  .modal-caption {
    font-size: 14px;
    margin-top: 15px;
  }
  
  /* 进一步简化动画 */
  .nebula,
  .galaxy {
    animation-duration: 100s !important;
  }
  
  .tooltip-popup {
    display: none;
  }
  
  /* 移动端性能优化 - 简化背景动画 */
  /* 禁用性能消耗大的动画 */
  .energy-wave,
  .light-scan,
  .particle-field,
  .pulse-ring,
  .energy-lines {
    display: none;
  }
  
  /* 保留简化的星空动画 */
  .stars-layer {
    animation-duration: 120s !important;
  }
  
  /* 保留星云但大幅简化 */
  .nebula {
    animation-duration: 60s !important;
    filter: blur(80px);
    opacity: 0.3;
  }
  
  .nebula-2,
  .nebula-3 {
    display: none;
  }
  
  /* 保留星系但简化 */
  .galaxy {
    animation-duration: 80s !important;
    filter: blur(60px);
    opacity: 0.25;
  }
  
  .galaxy-2 {
    display: none;
  }
  
  /* 降低流星出现频率 */
  .meteor-1 {
    animation: meteorFall1 2s linear infinite 0s;
    animation-iteration-count: 1;
    animation-delay: 5s;
  }
  
  .meteor-2 {
    animation: meteorFall2 2.2s linear infinite 40s;
    animation-iteration-count: 1;
    animation-delay: 13s;
  }
  
  .meteor-3 {
    animation: meteorFall3 2.5s linear infinite 60s;
    animation-iteration-count: 1;
    animation-delay: 22s;
  }
  
  .meteor-4 {
    animation: meteorFall4 2.3s linear infinite 80s;
    animation-iteration-count: 1;
    animation-delay: 30s;
  }
  
  /* 保留logo动画但降低频率 */
  .logo {
    animation-duration: 6s;
  }
  
  /* 提高视频透明度 */
  .hero-video {
    opacity: 0.5;
  }
  
  /* 保留按钮悬停效果但简化 */
  .btn::before {
    display: none;
  }
  
  .btn:active {
    transform: scale(0.98);
  }
  
  .footer {
    margin-top: 40px;
    padding: 30px 15px;
  }
  
  .footer p {
    font-size: 12px;
  }
  
  .health-advisory-title {
    font-size: 14px;
  }
  
  .health-advisory {
    font-size: 12px;
    white-space: normal;
    max-width: 100%;
  }
  
  .publication-info {
    font-size: 10px;
  }
  
  .filing-info {
    font-size: 11px;
  }
}