* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: #02040c url("images/bg.png") no-repeat top center;
  background-size: 100% auto;
  background-color: #02040c;
  color: #fff;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.top {
  padding: 10px 0 30px;
}

.logo {
  height: 42px;
  width: auto;
}

.hero {
  display: flex;
  align-items: center;
  gap: 40px;
  min-height: 520px;
}

.hero-left {
  flex: 1;
}

.hero-right {
  flex: 1;
}

.hero-right img,
.block-pic img,
.wide-pic {
  width: 100%;
  height: auto;
  display: block;
}

h1 {
  font-size: 46px;
  font-style: italic;
  letter-spacing: 2px;
  margin-bottom: 22px;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.pills span {
  background: #13c8ff;
  color: #04202a;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 15px;
  font-weight: bold;
}

.checks {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
  margin-bottom: 32px;
  font-size: 16px;
}

.checks li::before {
  content: "✓ ";
  color: #13c8ff;
  font-weight: bold;
}

.downloads {
  display: flex;
  gap: 10px;
}

.downloads a {
  flex: 1;
  min-width: 0;
}

.downloads a img {
  width: 100%;
  height: auto;
  display: block;
}

.block {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-top: 80px;
}

.block-text,
.block-pic {
  flex: 1;
}

h2 {
  font-size: 32px;
  line-height: 1.4;
  margin-bottom: 16px;
}

.block-text p {
  color: #c5d0e0;
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 28px;
}

footer {
  margin-top: 80px;
  text-align: center;
  color: #7a8699;
  font-size: 14px;
}

.bili-mask {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.86);
}

.bili-mask.is-show {
  display: block;
}

.bili-lock {
  overflow: hidden;
  height: 100%;
}

.bili-mask__corner {
  position: absolute;
  top: 4px;
  right: 10px;
  text-align: center;
}

.bili-mask__arrow {
  color: #13c8ff;
  font-size: 28px;
  line-height: 1;
  margin-bottom: 2px;
}

.bili-mask__menu {
  width: 36px;
  height: 36px;
  margin: 0 0 6px auto;
  border: 2px solid #13c8ff;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: rgba(19, 200, 255, 0.12);
}

.bili-mask__menu span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #fff;
}

.bili-mask__hint {
  color: #13c8ff;
  font-size: 14px;
  font-weight: bold;
}

.bili-mask__card {
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%);
  width: 86%;
  max-width: 340px;
  text-align: center;
  line-height: 1.7;
}

.bili-mask__title {
  font-size: 26px;
  font-weight: bold;
  margin-bottom: 14px;
}

.bili-mask__card p + p {
  color: #dce6f2;
  font-size: 18px;
}

.qr-mask {
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 9998;
  background: rgba(0, 0, 0, 0.82);
}

.qr-mask.is-show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-mask__card {
  width: 88%;
  max-width: 360px;
  padding: 28px 24px 22px;
  text-align: center;
  background: #0b1220;
  border: 1px solid rgba(19, 200, 255, 0.35);
  border-radius: 16px;
}

.qr-mask__title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 18px;
}

.qr-mask__img {
  width: 220px;
  height: 220px;
  display: block;
  margin: 0 auto 18px;
  background: #fff;
  padding: 10px;
  border-radius: 8px;
}

.qr-mask__close {
  min-width: 120px;
  padding: 8px 18px;
  border: 0;
  border-radius: 20px;
  background: #13c8ff;
  color: #04202a;
  font-size: 15px;
  font-weight: bold;
  cursor: pointer;
}

@media (max-width: 800px) {
  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  .hero,
  .block,
  .block-reverse {
    flex-direction: column;
  }

  .checks {
    grid-template-columns: 1fr;
  }
}