body {
  min-height: 100%;
  height: auto;
}
.main-page {
  width: 100%;
  margin: 0;
  padding: 0 20px;
  box-sizing: border-box;
  font-family: "Courier New", monospace;
  background: #1a1a1a;
  color: white;
  background-image: radial-gradient(
      circle at 25% 25%,
      #2a2a2a 2px,
      transparent 2px
    ),
    radial-gradient(circle at 75% 75%, #2a2a2a 2px, transparent 2px);
  background-size: 30px 30px;
  display: block;
  min-height: 100vh;
  overflow-x: hidden;
  height: 100vh;
}

.main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100vh;
  padding-top: 50px;
}

.game-started .main-page {
  display: none;
}

.main-page {
  scroll-behavior: smooth;
}

.game-container {
  position: relative;
  width: 1024px;
  height: 450px;
  background: #2a2a2a;
  border: 8px solid #444;
  box-shadow: 0 0 0 4px #000;
  overflow: hidden;
  margin-bottom: 40px;
  box-sizing: border-box;
}

.game-title {
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 60px;
  font-weight: bold;
  color: #4caf50;
  text-shadow: 4px 4px 0 #2e7d32, 8px 8px 0 #000;
  letter-spacing: 4px;
  z-index: 2;
}

.dino {
  position: absolute;
  right: 30%;
  bottom: 20%;
  width: 120px;
  height: 150px;
  background: linear-gradient(to bottom, #4caf50, #2e7d32);
  clip-path: polygon(
    0% 100%,
    20% 100%,
    20% 80%,
    40% 80%,
    40% 60%,
    60% 60%,
    60% 40%,
    80% 40%,
    80% 20%,
    100% 20%,
    100% 0%,
    60% 0%,
    60% 20%,
    40% 20%,
    40% 40%,
    20% 40%,
    20% 60%,
    0% 60%
  );
  box-shadow: 0 0 20px rgba(76, 175, 80, 0.5);
  z-index: 1;
}

.pixel-button {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 240px;
  height: 60px;
  cursor: pointer;
  font-size: 26px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #333;
  background: #fff;
  border: none;
  box-shadow: 0 8px 0 #ccc, 0 12px 0 #000, 0 0 0 4px #000;
  transition: all 0.1s ease;
  text-shadow: 2px 2px 0 #ddd;
  z-index: 10;
  animation: pulse 2s infinite;
}

.pixel-button:hover {
  animation: none;
  color: #e3560f;
}

.pixel-button:active {
  transform: translate(-50%, -50%) translateY(8px);
  box-shadow: 0 0 0 #ccc, 0 4px 0 #000, 0 0 0 4px #000;
  animation: none;
}

.dino-left {
  position: absolute;
  left: 50%;
  bottom: 50%;
  transform: translate(50%, 20px);
  animation: jump 1.5s infinite, pulse 2s infinite;
  width: 100px;
}

@keyframes jump {
  0%,
  100% {
    transform: translate(-50%, -50%) translateY(0);
  }
  50% {
    transform: translate(-50%, -50%) translateY(-15px);
  }
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 8px 0 #ccc, 0 12px 0 #000, 0 0 0 4px #000,
      0 0 10px rgba(255, 255, 255, 0.5);
  }
  50% {
    box-shadow: 0 8px 0 #ccc, 0 12px 0 #000, 0 0 0 4px #000,
      0 0 20px rgba(255, 255, 255, 0.8);
  }
}

.game-info {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 320px;
  max-height: 400px;
  background: rgba(0, 0, 0, 0.85);
  border: 4px solid #444;
  padding: 15px;
  color: white;
  z-index: 200;
  border-radius: 8px;
  display: none;
  overflow-y: auto;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
  max-width: 80vw;
}

.game-info::-webkit-scrollbar {
  width: 8px;
}

.game-info::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.game-info::-webkit-scrollbar-thumb {
  background: #4caf50;
  border-radius: 4px;
  border: 2px solid rgba(0, 0, 0, 0.3);
}

.game-info::-webkit-scrollbar-thumb:hover {
  background: #5cb860;
}

.game-info h2 {
  color: #4caf50;
  margin-bottom: 15px;
  text-shadow: 2px 2px 0 #000;
  font-size: 1.5rem;
}

.game-info h3 {
  color: #ff8c00;
  margin: 15px 0 10px;
  font-size: 1.2rem;
}

.game-info ul {
  padding-left: 20px;
  margin-bottom: 15px;
}

.game-info li {
  margin-bottom: 8px;
  line-height: 1.4;
}

.game-info p {
  margin-bottom: 15px;
  line-height: 1.4;
}

.info-button {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: #4caf50;
  border: none;
  border-radius: 50%;
  color: white;
  font-weight: bold;
  font-size: 24px;
  cursor: pointer;
  z-index: 300;
  box-shadow: 0 4px 0 #2e7d32, 0 0 0 2px #000;
  transition: all 0.2s;
  display: none;
}
.game-started .info-button {
  box-shadow: 0 4px 0 #2e7d32, 0 0 0 2px #4e9651;
  display: block;
}

.info-button:hover {
  background: #5cb860;
  transform: scale(1.1);
}

.close-button {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 30px;
  height: 30px;
  background: #ff4444;
  border: none;
  border-radius: 50%;
  color: white;
  font-weight: bold;
  font-size: 18px;
  cursor: pointer;
  z-index: 102;
  box-shadow: 0 2px 0 #cc0000;
}

.instructions {
  box-sizing: border-box;
  background: rgba(0, 0, 0, 0.7);
  padding: 30px;
  border: 4px solid #444;
  width: 1024px;
  text-align: left;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  line-height: 1.6;
  margin-bottom: 40px;
}

.instructions h2 {
  color: #4caf50;
  margin-bottom: 25px;
  text-shadow: 2px 2px 0 #000;
  font-size: 2.2rem;
  text-align: center;
  border-bottom: 3px solid #4caf50;
  padding-bottom: 10px;
  text-shadow: 2px 2px 0 #2e7d32, 4px 4px 0 #000;
}

.instructions h3 {
  color: #ff8c00;
  margin: 25px 0 15px;
  font-size: 1.4rem;
  border-left: 4px solid #ff8c00;
  padding-left: 12px;
  text-shadow: 1px 1px 0 #000;
}

.instructions p {
  margin-bottom: 20px;
  line-height: 1.7;
  font-size: 1.1rem;
  text-align: justify;
}

.instructions ul {
  padding-left: 25px;
  margin-bottom: 25px;
}

.instructions li {
  margin-bottom: 12px;
  line-height: 1.6;
  position: relative;
  padding-left: 10px;
}

.instructions li::before {
  content: "▸";
  color: #4caf50;
  font-weight: bold;
  position: absolute;
  left: -15px;
}

.instructions strong {
  color: #ff8c00;
  font-weight: bold;
}

html {
  scroll-behavior: smooth;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb {
  background: #4caf50;
  border-radius: 5px;
  border: 2px solid rgba(0, 0, 0, 0.3);
}

::-webkit-scrollbar-thumb:hover {
  background: #5cb860;
}

.copyright {
  text-align: center;
  padding: 20px;
  color: #888;
  font-size: 0.9rem;
  border-top: 1px solid #444;
  width: 100%;
  max-width: 1024px;
}

.copyright p {
  margin: 5px 0;
  line-height: 1.4;
}

.copyright a {
  color: #4caf50;
  text-decoration: none;
}

.copyright a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .copyright {
    padding: 15px;
    font-size: 0.8rem;
  }
}

.github-corner:hover .octo-arm {
  animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
  0%,
  100% {
    transform: rotate(0);
  }
  20%,
  60% {
    transform: rotate(-25deg);
  }
  40%,
  80% {
    transform: rotate(10deg);
  }
}

@media (max-width: 500px) {
  .github-corner:hover .octo-arm {
    animation: none;
  }
  .github-corner .octo-arm {
    animation: octocat-wave 560ms ease-in-out;
  }
}

.github-corner {
  position: fixed;
  z-index: 1000;
  right: 0;
  top: 0;
}

@media (min-width: 1200px) {
  .game-container {
    width: 1024px;
    height: 450px;
  }

  .instructions {
    width: 1024px;
  }
}

/* 中等桌面设备 (992px - 1199px) */
@media (max-width: 1199px) and (min-width: 992px) {
  .game-container {
    width: 90%;
    max-width: 900px;
    height: 400px;
  }

  .instructions {
    width: 90%;
    max-width: 900px;
  }

  .game-title {
    font-size: 50px;
  }

  .dino {
    width: 100px;
    height: 125px;
  }

  .pixel-button {
    width: 200px;
    height: 60px;
    font-size: 22px;
  }
}

/* 小型桌面设备 (768px - 991px) */
@media (max-width: 991px) and (min-width: 768px) {
  .game-info::-webkit-scrollbar {
    width: 6px;
  }
  .game-info::-webkit-scrollbar-track {
    border-radius: 3px;
  }
  .game-info::-webkit-scrollbar-thumb {
    border-radius: 3px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb {
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  .game-container {
    width: 95%;
    max-width: 750px;
    height: 380px;
    margin-bottom: 30px;
  }

  .instructions {
    width: 95%;
    max-width: 750px;
    padding: 25px;
  }

  .game-title {
    font-size: 42px;
    text-shadow: 3px 3px 0 #2e7d32, 6px 6px 0 #000;
  }

  .dino {
    width: 90px;
    height: 112px;
  }

  .pixel-button {
    width: 180px;
    height: 55px;
    font-size: 20px;
  }

  .instructions h2 {
    font-size: 1.8rem;
  }

  .instructions h3 {
    font-size: 1.2rem;
  }

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

  .dino-left {
    width: 90px;
  }
}

/* 平板设备 (576px - 767px) */
@media (max-width: 767px) and (min-width: 576px) {
  .game-info::-webkit-scrollbar {
    width: 6px;
  }
  .game-info::-webkit-scrollbar-track {
    border-radius: 3px;
  }
  .game-info::-webkit-scrollbar-thumb {
    border-radius: 3px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb {
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  .main-page {
    padding: 0 15px;
  }

  .main-content {
    padding-top: 50px;
  }

  .game-container {
    width: 95%;
    height: 320px;
    margin-bottom: 10px;
  }

  .instructions {
    width: 95%;
    padding: 20px;
    margin-bottom: 30px;
    margin-top: 16px;
  }

  .game-title {
    font-size: 36px;
    text-shadow: 2px 2px 0 #2e7d32, 4px 4px 0 #000;
    letter-spacing: 2px;
  }

  .dino {
    width: 75px;
    height: 94px;
  }

  .dino-left {
    width: 80px;
  }

  .pixel-button {
    width: 160px;
    height: 50px;
    font-size: 18px;
  }

  .instructions h2 {
    font-size: 1.6rem;
  }

  .instructions h3 {
    font-size: 1.1rem;
  }

  .instructions p {
    font-size: 0.95rem;
  }

  .game-info {
    width: 280px;
    max-height: 350px;
  }
}

/* 手机设备 (576px以下) */
@media (max-width: 575px) {
  .game-info::-webkit-scrollbar {
    width: 6px;
  }
  .game-info::-webkit-scrollbar-track {
    border-radius: 2px;
  }
  .game-info::-webkit-scrollbar-thumb {
    border-radius: 2px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  ::-webkit-scrollbar {
    width: 6px;
  }
  ::-webkit-scrollbar-track {
    border-radius: 3px;
  }
  ::-webkit-scrollbar-thumb {
    border-radius: 3px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }

  .main-page {
    padding: 0 10px;
    /* height: auto; */
    min-height: 100vh;
  }

  .main-content {
    padding-top: 20px;
    min-height: auto;
  }

  .game-container {
    width: 100%;
    height: 250px;
    margin-bottom: 0;
    border-width: 4px;
    box-shadow: 0 0 0 2px #000;
  }

  .instructions {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    margin-top: 16px;
  }

  .game-title {
    font-size: 28px;
    text-shadow: 1px 1px 0 #2e7d32, 2px 2px 0 #000;
    letter-spacing: 1px;
    top: 25%;
  }

  .dino {
    width: 60px;
    height: 75px;
    right: 25%;
  }
  .dino-left {
    width: 70px;
  }

  .pixel-button {
    width: 140px;
    height: 45px;
    font-size: 16px;
    letter-spacing: 1px;
  }

  .instructions h2 {
    font-size: 1.4rem;
    margin-bottom: 15px;
  }

  .instructions h3 {
    font-size: 1rem;
    margin: 15px 0 10px;
  }

  .instructions p {
    font-size: 0.9rem;
    margin-bottom: 15px;
    text-align: left;
  }

  .instructions ul {
    padding-left: 20px;
  }

  .instructions li {
    margin-bottom: 8px;
  }

  .game-info {
    width: 90%;
    right: 5%;
    top: 10px;
    max-height: 300px;
  }

  .info-button {
    width: 35px;
    height: 35px;
    font-size: 20px;
    top: 10px;
    right: 10px;
  }

  .copyright {
    padding: 15px;
    font-size: 0.8rem;
  }
}

/* 超小手机设备 (320px以下) */
@media (max-width: 320px) {
  .game-info::-webkit-scrollbar {
    width: 6px;
  }
  .game-info::-webkit-scrollbar-track {
    border-radius: 2px;
  }
  .game-info::-webkit-scrollbar-thumb {
    border-radius: 2px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  ::-webkit-scrollbar {
    width: 6px;
  }
  ::-webkit-scrollbar-track {
    border-radius: 3px;
  }
  ::-webkit-scrollbar-thumb {
    border-radius: 3px;
    border: 1px solid rgba(0, 0, 0, 0.3);
  }
  .main-page {
    padding: 0;
  }
  .game-container {
    height: 200px;
  }

  .game-title {
    font-size: 22px;
  }

  .dino {
    width: 50px;
    height: 62px;
  }

  .pixel-button {
    width: 120px;
    height: 40px;
    font-size: 14px;
  }

  .instructions {
    margin-top: 10px;
  }

  .instructions h2 {
    font-size: 1.2rem;
  }

  .instructions h3 {
    font-size: 0.9rem;
  }

  .instructions p {
    font-size: 0.85rem;
  }
}

/* 横屏适配 */
@media (max-height: 500px) and (orientation: landscape) {
  .main-content {
    padding-top: 10px;
  }

  .game-container {
    height: 70vh;
    max-height: 300px;
  }

  .instructions {
    margin-bottom: 20px;
  }
}