body {
  /* background-image: radial-gradient(
    circle farthest-corner at 10% 20%,
    rgba(100, 43, 115, 1) 0%,
    rgb(26, 2, 26) 90%
  ); */
  /*background-image: radial-gradient(
    circle farthest-corner at 24.1% 68.8%,
    rgba(50, 50, 50, 1) 0%,
    rgba(0, 0, 0, 1) 99.4%
  );*/
}

body::before {
  position: absolute;
  content: "";
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: center/cover no-repeat fixed url("/Images/Background-Images/背景-04.png");
  filter: brightness(35%);
}

.说明区 {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 450px;
  /* background-image: radial-gradient(
    circle 815px at 23.4% -21.8%,
    rgba(9, 29, 85, 1) 0.2%,
    rgba(0, 0, 0, 1) 100.2%
  ); */
  /*background-image: radial-gradient(
    circle 815px at 23.4% -21.8%,
    rgb(52, 62, 92) 0.2%,
    rgb(42, 54, 72) 100.2%
  );*/
  /*box-shadow: 0 1px 5px 0 #000a;*/
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 25px;
  text-shadow: 1px 1px 5px #000a;
}

/* .说明区::before {
  position: absolute;
  z-index: -1;
  content: "";
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  background: no-repeat center url("/Images/Background-Images/曲线.png");
  background-size: 100% 75%;
  opacity: 0.5;
} */

.第三方标题 {
  position: relative;
  z-index: 1;
  width: 650px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 15px;
}

.第三方标题 > span {
  width: 100%;
  line-height: 1;
}

.第三方标题中文 {
  font-size: 5rem;
  font-weight: 600;
  color: rgb(74, 211, 147);
}

.第三方标题英文 {
  font-size: 2rem;
  text-align: right;
  color: rgb(178, 178, 178);
  font-family: "JetBrains Mono";
}

.说明配图区 {
  font-size: 2.25rem;
}

.主内容 {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-wrap: wrap;
  /* flex-direction: column; */
  justify-content: center;
  gap: 50px;
  padding: 10vh 0;
}

.导航区 {
  position: relative;
  width: 750px;
  height: fit-content;
}

.标题 {
  width: fit-content;
  height: 65px;
  font-size: 1.25rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  /* padding: 15px; */
}

.标题图 {
  height: 30px;
  width: 30px;
  object-fit: contain;
}

.教程区 {
  background: linear-gradient(
    43deg,
    rgba(73, 84, 101, 0.55),
    rgba(68, 95, 123, 0.55)
  );
  backdrop-filter: blur(8px);
  border-radius: 10px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(95px, 120px));
  grid-auto-rows: 135px;
  gap: 5px 0;
  place-content: center;
  padding: 15px 5px;
  box-shadow: inset 1px 1px 2px 0 #ffffff2a, 6px 6px 15px 0 #0008;
}

.教程区网格 {
  position: relative;
  z-index: 0;
  border-radius: 5px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
}

/* .教程区网格:hover {
  animation: 教程区网格背景动画 2s infinite alternate linear;
  box-shadow: inset 1px 1px 1.5px 0 #fff5, 1px 1px 4px 0 #0008;
} */

.教程区网格::before {
  position: absolute;
  z-index: -1;
  width: 100%;
  height: 100%;
  border-radius: 5px;
  top: 0;
  left: 0;
  content: "";
  background: no-repeat center/cover url("/Images/Metal-Texture/金属质感-02.jpg");
  visibility: hidden;
  opacity: 0;
  filter: contrast(1) brightness(65%);
  transition: 0.15s;
}

.教程区网格:hover::before {
  box-shadow: inset 1.5px 1.5px 1.5px 0 #ffff, 1px 1px 4px 0 #0008;
  visibility: visible;
  opacity: 1;
}

@keyframes 教程区网格背景动画 {
  from {
    background: hsl(224, 41%, 31%);
  }
  to {
    background: hsl(338, 37%, 29%);
  }
}

.教程Logo {
  width: 80%;
  height: 60px;
  object-fit: contain;
}

.教程Logo[alt="Zbrush"] {
  filter: invert(85%);
}

.教程Logo[alt="Windows Server"] {
  filter: brightness(5);
}

.教程名称 {
  /* height: 50px; */
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  font-size: 0.925rem;
  text-align: center;
  padding: 0 5px;
}

/* ------------------------- ↓ 响应式设计 ------------------------- */
@media screen and (max-width: 1580px) {
  .主内容 {
    flex-wrap: nowrap;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .导航区 {
    width: 1000px;
    height: fit-content;
  }
}

@media screen and (max-width: 1120px) {
  .说明区 {
    display: none;
  }

  .导航区 {
    width: 95vw;
  }

  .教程区 {
    grid-template-columns: repeat(auto-fill, minmax(90px, 114px));
    padding: 15px 5px;
  }

  .主内容 {
    padding: 5vh 0;
  }
}

/* ------------------------- ↑ 响应式设计 ------------------------- */