@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap');

* {
  padding: 0;
  margin: 0;
  border: none;
  outline: none;
  font-family: "Inter", sans-serif;
}

html {
  height: 100%;
}

body {
  background-image: url('image/1.png');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
  transition: background-image 0.8s ease-in-out;
  position: relative;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  background: linear-gradient(transparent 50%, rgb(0, 0, 0));
  pointer-events: none;
  z-index: 0;
}

/* Background-images */

.content img {
  position: absolute;
  bottom: -12%;
}

header {
  position: absolute;
  top: 0;
  z-index: 1;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.subtitle {
  font-weight: 400;
  color: white;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  font-size: 2.4vw;
  letter-spacing: 1vw;
}

.title {
  position: absolute;
  top: 45%;
  right: 50%;
  transform: translate(50%, -50%);
  cursor: pointer;
  transition: all 0.3s ease;
  width: 90vw;
  text-align: center;
}

.title:hover h1 {
  transform: scale(1.02);
  text-shadow: 0 0 80px rgba(22, 66, 60, 0.9);
}

.title h1 {
  font-weight: 900;
  text-transform: uppercase;
  color: white;
  text-align: center;
  margin: 0;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  transition: all 0.4s ease;
  /* 使用vw单位让字体和窗口同宽 */
  font-size: 12vw;
  letter-spacing: 4vw;
  line-height: 1;
  width: 100%;
}

p {
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 1px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
  width: 70%;
  text-align: center;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.2);
}

.info-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  position: absolute;
  bottom: 18%;
  z-index: 1;
}

.cta {
  position: absolute;
  bottom: 8%;
  display: flex;
  justify-content: center;
  width: 100%;
  z-index: 1;
}

.cta button {
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.8);
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 50px;
  height: 50px;
  width: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
  cursor: pointer;
}

.cta button:hover {
  background-color: rgba(255, 255, 255, 0.8);
  color: rgb(53, 53, 53);
}

.slider {
  position: absolute;
  top: 50%;
  width: 100%;
  display: flex;
  justify-content: space-between;
}

.slider i {
  padding: 0 5%;
  font-size: 36px;
  color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all 0.3s ease;
}

.slider i:hover {
  color: rgba(255, 255, 255, 0.9);
  transform: scale(1.2);
}

/* Animations */
@keyframes bottomIn {
  from {
    transform: translateY(200px);
  }
  to {
    transform: translateY(0);
  }
}

.back-1 {
  animation: bottomIn 1s ease-out forwards;
}

.back-2 {
  animation: bottomIn 1.3s ease-out forwards;
}

.back-3 {
  animation: bottomIn 1.5s ease-out forwards;
}

@keyframes bottomInText {
  from {
    transform: translateY(500px);
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

h1 {
  animation: bottomInText 1.2s ease-out forwards;
}

.title h1 {
  animation: bottomInText 1.2s ease-out forwards;
}

p {
  animation: bottomInText 1.2s ease-out forwards;
  animation-delay: 0.2s;
  opacity: 0;
}

button {
  animation: bottomInText 1.2s ease-out forwards;
  animation-delay: 0.3s;
  opacity: 0;
}

/* 背景渐入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

body {
  animation: fadeIn 1s ease-out forwards;
}

@keyframes topIn {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.subtitle {
  animation: topIn 1.2s ease-out forwards;
}

@keyframes zoomOut {
  from {
    transform: scale(1.5);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.slider {
  animation: zoomOut 1.2s ease-out forwards;
}

/* Site name change animation */
@keyframes slideUp {
  from {
    transform: translateY(100px);
    opacity: 0;
  }
  to {
    transform: translateY(-50%);
    opacity: 1;
  }
}

.title h1 {
  transition: all 0.5s ease;
}

.title.changing h1 {
  animation: slideUp 0.5s ease-out forwards;
}