:root {
  --preview-theme: #4cc3ff;
  --preview-logical-width: 390px;
  --preview-logical-height: 666px;
  --preview-rendered-width: 390px;
  --preview-rendered-height: 666px;
  --preview-scale: 1;
}

.adaptive-shell,
.mobile-preview,
.preview-frame,
.mobile-viewport {
  width: 100%;
  height: 100%;
}

.project-intro {
  display: none;
}

.mobile-viewport {
  position: relative;
  overflow: hidden;
}

html.preview-mode,
html.preview-mode body {
  width: 100%;
  min-width: 0;
  min-height: 100%;
  height: auto;
  overflow: auto;
}

html.preview-mode body {
  color: #26344d;
  background:
    radial-gradient(circle at 12% 14%, rgba(76, 195, 255, 0.36), transparent 26%),
    radial-gradient(circle at 88% 82%, rgba(76, 195, 255, 0.24), transparent 29%),
    linear-gradient(145deg, #f6fcff 0%, #c8efff 55%, var(--preview-theme) 100%);
}

.preview-mode .adaptive-shell {
  box-sizing: border-box;
  display: grid;
  grid-template-columns: minmax(300px, 520px) var(--preview-rendered-width);
  align-items: center;
  justify-content: center;
  gap: clamp(52px, 8vw, 132px);
  min-height: 100vh;
  min-height: 100svh;
  padding: 40px clamp(30px, 5vw, 88px);
  position: relative;
  isolation: isolate;
}

.preview-mode .adaptive-shell::before,
.preview-mode .adaptive-shell::after {
  content: '';
  position: fixed;
  z-index: -1;
  border: 1px solid rgba(76, 195, 255, 0.35);
  border-radius: 50%;
  pointer-events: none;
}

.preview-mode .adaptive-shell::before {
  width: 360px;
  height: 360px;
  top: -210px;
  right: 17%;
}

.preview-mode .adaptive-shell::after {
  width: 260px;
  height: 260px;
  bottom: -170px;
  left: 8%;
}

.preview-mode .project-intro {
  display: block;
  max-width: 500px;
}

.project-intro h1 {
  margin: 0;
  color: #243447;
  font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
  font-size: clamp(21px, 2.1vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.preview-mode .mobile-preview {
  display: flex;
  width: var(--preview-rendered-width);
  height: var(--preview-rendered-height);
  align-items: center;
  justify-content: center;
}

.preview-mode .preview-frame {
  width: var(--preview-rendered-width);
  height: var(--preview-rendered-height);
  flex: 0 0 auto;
  position: relative;
  overflow: visible;
  border-radius: calc(28px * var(--preview-scale));
  background: #dfe9f5;
  box-shadow:
    0 34px 80px rgba(43, 69, 103, 0.2),
    0 8px 24px rgba(43, 69, 103, 0.12);
}

.preview-mode .mobile-viewport {
  width: var(--preview-logical-width);
  height: var(--preview-logical-height);
  position: absolute;
  top: 0;
  left: 0;
  border-radius: 28px;
  background: #f3f3f3;
  box-shadow: inset 0 0 0 1px rgba(35, 63, 97, 0.1);
  transform: scale(var(--preview-scale)) translateZ(0);
  transform-origin: top left;
}

@media (max-width: 899px) {
  .preview-mode .adaptive-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    padding: 34px 20px 40px;
  }

  .preview-mode .project-intro {
    max-width: 620px;
    margin: 0 auto;
    text-align: center;
  }

  .preview-mode .project-intro h1 {
    font-size: clamp(18px, 4vw, 27px);
  }

  .preview-mode .mobile-preview {
    justify-self: center;
  }
}