* {
  box-sizing: border-box;
}

:root {
  --ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.2, 0.8, 0.24, 1);
  --text-main: rgba(76, 76, 76, 0.92);
  --text-muted: rgba(112, 112, 112, 0.74);
  --panel-border: rgba(184, 184, 184, 0.42);
  --panel-bg: rgba(255, 255, 255, 0.91);
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #f0f0f0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
}

button {
  font: inherit;
}

.site-shell,
.scene {
  width: 100vw;
  height: 100vh;
}

.scene {
  position: relative;
  overflow: hidden;
  background: #f3f3f3;
  isolation: isolate;
}

.scene::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background:
    radial-gradient(circle at 8% 18%, rgba(255, 255, 255, 0.34), transparent 36%),
    radial-gradient(circle at 87% 10%, rgba(255, 255, 255, 0.2), transparent 34%);
}

.mobile-portrait-gate {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  pointer-events: none;
  touch-action: none;
  background: rgba(220, 220, 220, 0.42);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.mobile-portrait-gate-panel {
  width: min(86vw, 520px);
  padding: clamp(18px, 4vw, 28px) clamp(20px, 5vw, 34px);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow:
    0 20px 60px rgba(120, 120, 120, 0.12),
    0 1px 0 rgba(255, 255, 255, 0.6) inset;
}

.mobile-portrait-gate-text {
  margin: 0;
  font-size: clamp(14px, 4vw, 18px);
  color: rgba(90, 90, 90, 0.9);
  letter-spacing: 0.08em;
  line-height: 1.55;
  text-align: center;
}

/* Mobile portrait bilingual prompt (English second line). */
.mobile-portrait-gate-text-en {
  display: inline-block;
  margin-top: 0.26rem;
  font-size: clamp(11px, 3vw, 14px);
  letter-spacing: 0.02em;
}

.menu-bg,
.grass,
.front-page-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.menu-bg {
  z-index: 0;
  opacity: 1;
  transform: scale(1);
  transition: transform 1200ms var(--ease-smooth);
}

.grass {
  z-index: 1;
  opacity: 0;
  transform: translateY(16px) scale(1.01);
  transition:
    opacity 720ms ease,
    transform 1100ms var(--ease-smooth);
}

.front-page-bg {
  z-index: 2;
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
  transition:
    opacity 760ms ease,
    transform 1200ms var(--ease-smooth),
    filter 760ms ease;
}

.headline {
  position: absolute;
  z-index: 130;
  pointer-events: none;
  animation: titleFloat 8.8s ease-in-out infinite;
  transition:
    opacity 600ms ease,
    transform 900ms var(--ease-smooth);
}

.headline-image {
  display: block;
  width: 100%;
  height: auto;
}

.home-headline {
  left: 50%;
  top: 5.2%;
  width: clamp(520px, 48vw, 880px);
  transform: translate3d(-50%, 0, 0);
  opacity: 1;
}

.menu-headline {
  right: 1.1%;
  top: 5.6%;
  width: clamp(470px, 41.5vw, 790px);
  transform: translate3d(16px, 0, 0);
  opacity: 0;
  animation-delay: -2s;
}

.top-nav {
  position: absolute;
  top: 3.8%;
  right: 4.4%;
  z-index: 260;
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.2vw, 24px);
  opacity: 0;
  transform: translate3d(0, -10px, 0);
  pointer-events: none;
  transition:
    opacity 420ms ease,
    transform 420ms var(--ease-soft);
}

.top-nav.visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
}

.nav-link {
  border: none;
  background: transparent;
  padding: 0;
  color: rgba(116, 116, 116, 0.75);
  font-size: clamp(12px, 1.02vw, 18px);
  font-weight: 500;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition:
    color 240ms ease,
    transform 240ms var(--ease-soft);
}

.nav-link:hover,
.nav-link.active {
  color: rgba(68, 68, 68, 0.95);
  transform: translateY(-1px);
}

.nav-item {
  position: relative;
}

.nav-item-portfolio::after {
  content: "";
  position: absolute;
  left: -18px;
  right: -18px;
  top: 100%;
  height: 20px;
}

.portfolio-submenu {
  position: absolute;
  top: calc(100% + 10px);
  right: -8px;
  display: grid;
  gap: 5px;
  min-width: 300px;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid rgba(196, 196, 196, 0.45);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 30px rgba(159, 159, 159, 0.18);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transform: translate3d(0, -6px, 0);
  transition:
    opacity 220ms ease,
    transform 220ms var(--ease-soft);
}

.nav-item-portfolio:hover .portfolio-submenu,
.nav-item-portfolio:focus-within .portfolio-submenu,
.nav-item-portfolio.submenu-open .portfolio-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translate3d(0, 0, 0);
}

.submenu-link {
  border: none;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 7px;
  color: rgba(88, 88, 88, 0.9);
  font-size: 12.6px;
  text-align: left;
  padding: 6px 8px;
  cursor: pointer;
  transition:
    background 220ms ease,
    color 220ms ease,
    transform 220ms var(--ease-soft);
}

.submenu-link:hover {
  background: rgba(245, 245, 245, 0.95);
  color: rgba(62, 62, 62, 0.95);
  transform: translateX(1px);
}

.scroll-indicator,
.section-up-indicator {
  position: absolute;
  z-index: 210;
  border: none;
  background: transparent;
  color: rgba(100, 100, 100, 0.62);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}

.scroll-indicator {
  left: 50%;
  bottom: 3.8%;
  transform: translateX(-50%);
  color: rgba(72, 72, 72, 0.78);
  filter: none;
}

.section-up-indicator {
  left: 50%;
  top: 2.9%;
  transform: translateX(-50%);
}

.scroll-indicator .scroll-text {
  color: rgba(72, 72, 72, 0.78);
  text-shadow: none;
  display: inline-block;
  padding: 0.24rem 0.76rem;
  border-radius: 999px;
  background: linear-gradient(130deg, rgba(160, 160, 160, 0.16), rgba(190, 190, 190, 0.2));
  border: 1px solid rgba(98, 98, 98, 0.2);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.scroll-indicator .scroll-arrow {
  border-color: rgba(96, 96, 96, 0.42);
  background: transparent;
  box-shadow: none;
}

.scroll-indicator .scroll-arrow::before,
.scroll-indicator .scroll-arrow::after {
  border-right: 1.5px solid rgba(88, 88, 88, 0.82);
  border-bottom: 1.5px solid rgba(88, 88, 88, 0.82);
}

.scroll-text,
.section-up-text {
  font-size: clamp(11px, 0.8vw, 14px);
  letter-spacing: 0.11em;
  text-transform: none;
}

.scroll-arrow,
.section-up-arrow {
  position: relative;
  width: 22px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(146, 146, 146, 0.42);
  background: rgba(255, 255, 255, 0.22);
}

.scroll-arrow::before,
.scroll-arrow::after,
.section-up-arrow::before,
.section-up-arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid rgba(118, 118, 118, 0.72);
  border-bottom: 1.5px solid rgba(118, 118, 118, 0.72);
}

.scroll-arrow::before,
.scroll-arrow::after {
  transform: translateX(-50%) rotate(45deg);
  animation: arrowDownPulse 2s ease-in-out infinite;
}

.scroll-arrow::before {
  top: 9px;
}

.scroll-arrow::after {
  top: 16px;
  animation-delay: 0.16s;
}

.section-up-arrow::before,
.section-up-arrow::after {
  transform: translateX(-50%) rotate(225deg);
  animation: arrowUpPulse 2s ease-in-out infinite;
}

.section-up-arrow::before {
  top: 16px;
}

.section-up-arrow::after {
  top: 9px;
  animation-delay: 0.16s;
}

.planet {
  position: absolute;
  z-index: 72;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
  transform-origin: center center;
  will-change: left, top, width, opacity, transform, filter, rotate;
  animation:
    planetFloat 7.9s ease-in-out infinite,
    glowPulse 6.7s ease-in-out infinite;
  transition:
    left 1050ms var(--ease-smooth),
    top 1050ms var(--ease-smooth),
    width 1050ms var(--ease-smooth),
    opacity 480ms ease,
    transform 380ms var(--ease-soft),
    filter 380ms ease,
    rotate 650ms var(--ease-soft);
}

.planet-orange {
  z-index: 71;
  --glow: rgba(245, 171, 98, 0.34);
  animation-delay: 0s, -0.6s;
}

.planet-blue {
  z-index: 74;
  --glow: rgba(122, 177, 255, 0.3);
  animation-delay: -0.8s, -1.4s;
}

.planet-pink {
  z-index: 75;
  --glow: rgba(244, 166, 206, 0.28);
  animation-delay: -1.6s, -2.2s;
}

.planet-white {
  z-index: 73;
  --glow: rgba(199, 229, 255, 0.27);
  animation-delay: -2.4s, -3s;
}

.planet-green {
  z-index: 71;
  --glow: rgba(146, 219, 193, 0.28);
  animation-delay: -3.2s, -3.8s;
}

.planet-purple {
  z-index: 76;
  --glow: rgba(181, 142, 224, 0.26);
  animation-delay: -4s, -4.4s;
}

.scene[data-state="menu"] .planet {
  pointer-events: auto;
}

.scene[data-state="menu"] .planet.main-planet:hover {
  transform: scale(1.06);
}

.scene[data-state="home"] .planet {
  opacity: 0;
  pointer-events: none;
}

.scene[data-state="menu-transition"] .planet,
.scene[data-state="menu"] .planet {
  opacity: 1;
}

.scene[data-state="section-transition"] .planet,
.scene[data-state="section"] .planet {
  opacity: 0;
  pointer-events: none;
}

.scene[data-state="section-transition"] .planet.is-active,
.scene[data-state="section"] .planet.is-active {
  opacity: 1;
}

.scene[data-state="section-transition"] .planet.is-active,
.scene[data-state="section"] .planet.is-active {
  animation:
    sectionSpin 42s linear infinite,
    glowPulse 6.7s ease-in-out infinite;
  translate: 0 0;
}

.scene[data-state="section"][data-section="about-xingyuan"] .planet,
.scene[data-state="detail"] .planet {
  opacity: 0 !important;
  pointer-events: none !important;
}

.scene[data-state="section"] .planet.is-active.is-fading,
.scene[data-state="section-transition"] .planet.is-active.is-fading {
  opacity: 0;
}

.scene[data-state="menu-returning"] .planet {
  opacity: 1;
  pointer-events: none;
}

.scene[data-state="menu-returning-prep"] .planet {
  opacity: 0;
  pointer-events: none;
}

.planet-label {
  position: absolute;
  z-index: 300;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 0.54rem 1.06rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  color: rgba(74, 74, 74, 0.9);
  font-size: clamp(12px, 0.92vw, 16px);
  letter-spacing: 0.03em;
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(8px);
  transition: opacity 220ms ease;
}

.planet-label.visible {
  opacity: 1;
}

/* Mobile/tablet grouped planet label animation: softer, lighter, and slower alternating label groups. */
.planet-label.mobile-cycle {
  opacity: 0;
  line-height: 1.26;
  letter-spacing: 0.024em;
  background: rgba(255, 255, 255, 0.68);
  color: rgba(82, 82, 82, 0.78);
  box-shadow:
    0 10px 30px rgba(164, 164, 164, 0.18),
    0 0 0 1px rgba(255, 255, 255, 0.34) inset;
  /* Slightly faster mobile breathing animation while keeping the same soft fade character. */
  animation: mobilePlanetLabelGroupFade 4.6s var(--ease-soft) both;
}

/* Mobile separate grouped planet labels: each label stays above its own planet in grouped fades. */
.planet-label.mobile-group-label {
  max-width: min(42vw, 240px);
  text-align: center;
}

.scene[data-state="home"] .planet-orange {
  left: -3.1%;
  top: 37.5%;
  width: 28.2%;
}

.scene[data-state="home"] .planet-blue {
  left: 20.1%;
  top: 50%;
  width: 16.8%;
}

.scene[data-state="home"] .planet-pink {
  left: 42.7%;
  top: 58.2%;
  width: 11.5%;
}

.scene[data-state="home"] .planet-white {
  left: 55.9%;
  top: 45.1%;
  width: 19.1%;
}

.scene[data-state="home"] .planet-green {
  left: 71.9%;
  top: 31.9%;
  width: 29.8%;
}

.scene[data-state="home"] .planet-purple {
  left: 74.1%;
  top: 66.2%;
  width: 17.1%;
}

.scene[data-state="menu-transition"] .planet-orange,
.scene[data-state="menu"] .planet-orange,
.scene[data-state="section-transition"] .planet-orange {
  left: -17.8%;
  top: -38.3%;
  width: 47.6%;
}

.scene[data-state="menu-transition"] .planet-blue,
.scene[data-state="menu"] .planet-blue,
.scene[data-state="section-transition"] .planet-blue {
  left: -4.9%;
  top: 42.4%;
  width: 24.7%;
}

.scene[data-state="menu-transition"] .planet-pink,
.scene[data-state="menu"] .planet-pink,
.scene[data-state="section-transition"] .planet-pink {
  left: 24.8%;
  top: 68.8%;
  width: 22.1%;
}

.scene[data-state="menu-transition"] .planet-white,
.scene[data-state="menu"] .planet-white,
.scene[data-state="section-transition"] .planet-white {
  left: 38.8%;
  top: 24.2%;
  width: 29.1%;
}

.scene[data-state="menu-transition"] .planet-green,
.scene[data-state="menu"] .planet-green,
.scene[data-state="section-transition"] .planet-green {
  left: 70.1%;
  top: 54.8%;
  width: 41.8%;
}

.scene[data-state="menu-transition"] .planet-purple,
.scene[data-state="menu"] .planet-purple,
.scene[data-state="section-transition"] .planet-purple {
  left: 12.8%;
  top: 18.8%;
  width: 14.8%;
}

.scene[data-state="section"] .planet-orange {
  left: -66%;
  top: -94%;
  width: 50%;
}

.scene[data-state="section"] .planet-blue {
  left: -54%;
  top: 54%;
  width: 27%;
}

.scene[data-state="section"] .planet-pink {
  left: 40%;
  top: 146%;
  width: 24%;
}

.scene[data-state="section"] .planet-white {
  left: 66%;
  top: -86%;
  width: 32%;
}

.scene[data-state="section"] .planet-green {
  left: 128%;
  top: 66%;
  width: 46%;
}

.scene[data-state="section"] .planet-purple {
  left: 4%;
  top: -72%;
  width: 16%;
}

.scene[data-state="menu-returning-prep"] .planet-orange,
.scene[data-state="menu-returning"] .planet-orange {
  left: -66%;
  top: -94%;
  width: 50%;
}

.scene[data-state="menu-returning-prep"] .planet-blue,
.scene[data-state="menu-returning"] .planet-blue {
  left: -54%;
  top: 54%;
  width: 27%;
}

.scene[data-state="menu-returning-prep"] .planet-pink,
.scene[data-state="menu-returning"] .planet-pink {
  left: 40%;
  top: 146%;
  width: 24%;
}

.scene[data-state="menu-returning-prep"] .planet-white,
.scene[data-state="menu-returning"] .planet-white {
  left: 66%;
  top: -86%;
  width: 32%;
}

.scene[data-state="menu-returning-prep"] .planet-green,
.scene[data-state="menu-returning"] .planet-green {
  left: 128%;
  top: 66%;
  width: 46%;
}

.scene[data-state="menu-returning-prep"] .planet-purple,
.scene[data-state="menu-returning"] .planet-purple {
  left: 4%;
  top: -72%;
  width: 16%;
}

.scene[data-state="section-transition"][data-section="ml-coding"] .planet-white.is-active,
.scene[data-state="section"][data-section="ml-coding"] .planet-white.is-active {
  left: -31.5%;
  top: 31.2%;
  width: 62%;
}

.scene[data-state="section-transition"][data-section="digital-media"] .planet-green.is-active,
.scene[data-state="section"][data-section="digital-media"] .planet-green.is-active {
  left: 52.2%;
  top: 41.8%;
  width: 66%;
}

.scene[data-state="section-transition"][data-section="ds-data-science"] .planet-blue.is-active,
.scene[data-state="section"][data-section="ds-data-science"] .planet-blue.is-active {
  left: 63.4%;
  top: 1.8%;
  width: 64%;
}

.scene[data-state="section-transition"][data-section="aigc"] .planet-pink.is-active,
.scene[data-state="section"][data-section="aigc"] .planet-pink.is-active {
  left: 7%;
  top: 70%;
  width: 86%;
}

.scene[data-state="section-transition"][data-section="visual-design"] .planet-orange.is-active,
.scene[data-state="section"][data-section="visual-design"] .planet-orange.is-active {
  left: -48%;
  top: 40%;
  width: 90%;
}

.scene[data-state="section-transition"][data-section="about-xingyuan"] .planet-purple.is-active {
  left: 11.4%;
  top: 13.2%;
  width: 18.5%;
}

.sections-layer {
  position: absolute;
  inset: 0;
  z-index: 95;
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}

.sections-layer.visible {
  opacity: 1;
  pointer-events: auto;
}

.section-page {
  position: absolute;
  inset: 0;
  padding: clamp(88px, 12vh, 130px) clamp(42px, 4.8vw, 84px) clamp(38px, 5vh, 70px);
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  pointer-events: none;
  transition:
    opacity 420ms ease,
    transform 820ms var(--ease-smooth);
}

.section-page.active {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
}

.section-bg-title {
  position: absolute;
  top: clamp(104px, 14.2vh, 152px);
  left: clamp(44px, 5vw, 92px);
  margin: 0;
  font-size: clamp(36px, 4.2vw, 82px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(193, 193, 193, 0.5);
  z-index: 1;
  pointer-events: none;
}

.section-scroll {
  position: relative;
  z-index: 2;
  height: 100%;
}

.section-scroll-locked {
  overflow: hidden;
}

.section-scrollable {
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(180, 180, 180, 0.65) transparent;
}

.section-scrollable::-webkit-scrollbar {
  width: 9px;
}

.section-scrollable::-webkit-scrollbar-track {
  background: transparent;
}

.section-scrollable::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(180, 180, 180, 0.58);
}

.cards {
  position: relative;
  display: grid;
  gap: clamp(14px, 1.25vw, 24px);
  padding-top: clamp(78px, 10vh, 124px);
  padding-bottom: clamp(40px, 8vh, 98px);
}

.project-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  padding: 9px 9px 12px;
  cursor: pointer;
  box-shadow:
    0 10px 34px rgba(138, 138, 138, 0.16),
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
  transform: rotate(var(--tilt, 0deg));
  transition:
    transform 300ms var(--ease-soft),
    box-shadow 300ms ease;
}

.project-card:hover,
.project-card:focus-visible {
  transform: rotate(var(--tilt, 0deg)) translateY(-5px) scale(1.045);
  box-shadow:
    0 20px 44px rgba(138, 138, 138, 0.24),
    0 1px 0 rgba(255, 255, 255, 0.9) inset;
  outline: none;
}

.tilt-left {
  --tilt: -1.4deg;
}

.tilt-right {
  --tilt: 1.5deg;
}

.project-card h3 {
  margin: 10px 2px 4px;
  font-size: clamp(14px, 1.04vw, 18px);
  font-weight: 600;
  color: rgba(68, 68, 68, 0.9);
}

.project-card p {
  margin: 0 2px;
  font-size: clamp(11px, 0.82vw, 14px);
  color: rgba(110, 110, 110, 0.9);
  line-height: 1.35;
}

.card-cover {
  width: 100%;
  height: clamp(130px, 20vh, 230px);
  border-radius: 2px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(226, 226, 226, 0.9), rgba(208, 208, 208, 0.84));
  border: 1px solid rgba(183, 183, 183, 0.44);
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.01);
  transition: transform 360ms var(--ease-soft);
}

.project-card:hover .card-cover img,
.project-card:focus-visible .card-cover img {
  transform: scale(1.05);
}

.cards-ml {
  margin-left: clamp(136px, 16.4vw, 318px);
  margin-right: clamp(4px, 0.8vw, 14px);
  width: min(82vw, 1280px);
  padding-top: clamp(76px, 9.6vh, 136px);
  padding-bottom: clamp(12px, 2.2vh, 26px);
  display: grid;
  grid-template-columns: minmax(430px, 1.06fr) minmax(340px, 0.94fr);
  grid-template-rows: auto auto;
  align-items: start;
  gap: clamp(14px, 1.2vw, 22px);
  height: auto;
}

.cards-ml .project-card:nth-child(1) {
  grid-row: 1 / span 2;
  min-height: clamp(390px, 54vh, 580px);
  height: auto;
  padding-bottom: 10px;
}

.cards-ml .project-card:nth-child(1) .card-cover {
  height: clamp(290px, 40vh, 430px);
}

.cards-ml .project-card:nth-child(2) {
  margin-top: 0;
  min-height: clamp(240px, 31vh, 340px);
  height: auto;
}

.cards-ml .project-card:nth-child(2) .card-cover {
  height: clamp(144px, 20vh, 212px);
}

.cards-ml .project-card:nth-child(3) {
  grid-column: 2;
  grid-row: 2;
  width: 100%;
  min-height: clamp(220px, 29vh, 310px);
  height: auto;
}

.cards-ml .project-card:nth-child(3) .card-cover {
  height: clamp(132px, 18vh, 186px);
}

.cards-digital {
  width: min(74vw, 1020px);
  grid-template-columns: repeat(2, minmax(240px, 1fr));
}

.cards-ds {
  width: min(68vw, 960px);
  grid-template-columns: repeat(2, minmax(230px, 1fr));
}

.cards-ds .card-wide {
  grid-column: 1 / span 2;
}

.cards-ds .card-wide .card-cover {
  height: clamp(115px, 15vh, 160px);
}

.cards-aigc {
  width: min(90vw, 1380px);
  margin-left: clamp(10px, 1.6vw, 28px);
  margin-right: auto;
  padding-top: clamp(88px, 11vh, 150px);
  display: grid;
  grid-template-columns: minmax(560px, 1.45fr) minmax(320px, 0.78fr);
  align-items: end;
  gap: clamp(22px, 2vw, 38px);
}

.cards-aigc .project-card {
  min-height: clamp(250px, 34vh, 360px);
}

.cards-aigc .project-card:nth-child(1) {
  min-height: clamp(380px, 52vh, 560px);
}

.cards-aigc .project-card:nth-child(1) .card-cover {
  height: clamp(240px, 35vh, 390px);
}

.cards-aigc .project-card:nth-child(2) {
  align-self: start;
  margin-top: clamp(62px, 8vh, 118px);
  min-height: clamp(240px, 32vh, 350px);
}

.cards-visual {
  margin-left: auto;
  width: min(82vw, 1260px);
  padding-top: clamp(96px, 12.2vh, 164px);
  grid-template-columns: repeat(2, minmax(360px, 1fr));
}

.cards-visual .project-card {
  min-height: clamp(340px, 46vh, 520px);
}

.cards-visual .card-cover {
  height: clamp(240px, 33vh, 370px);
}

.section-about {
  padding: 0;
  background: rgba(255, 255, 255, 0.86);
}

.about-scroll {
  height: 100%;
  scroll-snap-type: y mandatory;
  overflow-y: auto;
}

.about-scene {
  position: relative;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
  scroll-snap-align: start;
}

.about-scene-bg,
.about-scene-fg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.about-scene-bg {
  z-index: 1;
}

.about-scene-fg {
  z-index: 3;
  transform-origin: center 56%;
  transition:
    transform 840ms var(--ease-smooth),
    opacity 720ms ease,
    filter 760ms ease;
}

.about-scene.is-current .about-scene-fg {
  opacity: 1;
  transform: translate3d(0, 0, 0) rotateY(0deg);
  filter: blur(0);
}

.about-scene:not(.is-current) .about-scene-fg {
  opacity: 0.2;
  transform: translate3d(0, -18px, 0) rotateY(-12deg) scale(1.03);
  filter: blur(1.4px);
}

.about-scene-headline {
  position: absolute;
  z-index: 5;
  width: clamp(260px, 25vw, 460px);
  height: auto;
  pointer-events: none;
  filter: drop-shadow(0 4px 20px rgba(120, 120, 120, 0.18));
}

.about-scene-headline-left {
  top: clamp(28px, 4.8vh, 52px);
  left: clamp(28px, 3.8vw, 62px);
}

.about-scene-headline-right {
  top: clamp(26px, 4.1vh, 48px);
  right: clamp(28px, 3.6vw, 58px);
}

.about-scene-hint {
  position: absolute;
  left: 50%;
  bottom: clamp(28px, 3.5vh, 44px);
  transform: translateX(-50%);
  z-index: 6;
  color: rgba(255, 255, 255, 0.92);
  background: transparent;
  border: none;
  border-radius: 999px;
  padding: 0.16rem 0.5rem 0.82rem;
  text-align: center;
  font-size: clamp(11px, 0.86vw, 14px);
  letter-spacing: 0.06em;
  text-transform: none;
  opacity: 0.92;
  text-shadow:
    0 0 6px rgba(255, 255, 255, 0.35),
    0 0 12px rgba(255, 255, 255, 0.25);
  animation: hintGlow 2.4s ease-in-out infinite;
}

.about-scene[data-scene-index="1"] .about-scene-hint,
.about-scene[data-scene-index="3"] .about-scene-hint {
  background: linear-gradient(130deg, rgba(160, 160, 160, 0.16), rgba(190, 190, 190, 0.2));
  border: 1px solid rgba(228, 228, 228, 0.22);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.about-scene-hint::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.24rem;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid rgba(255, 255, 255, 0.92);
  border-bottom: 1.5px solid rgba(255, 255, 255, 0.92);
  transform: translateX(-50%) rotate(45deg);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
  animation: arrowDownPulse 2s ease-in-out infinite;
}

.about-scene-hint::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -0.1rem;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid rgba(255, 255, 255, 0.92);
  border-bottom: 1.5px solid rgba(255, 255, 255, 0.92);
  transform: translateX(-50%) rotate(45deg);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
  animation: arrowDownPulse 2s ease-in-out infinite;
  animation-delay: 0.16s;
}

.detail-layer {
  position: absolute;
  inset: 0;
  z-index: 150;
  background: #fff;
  opacity: 0;
  pointer-events: none;
  transition: opacity 380ms ease;
}

.detail-layer.visible {
  opacity: 1;
  pointer-events: auto;
}

.detail-pages {
  position: absolute;
  inset: 0;
}

.detail-page {
  position: absolute;
  inset: 0;
  display: none;
  overflow-y: auto;
  background: #fff;
  padding: clamp(86px, 11vh, 120px) clamp(34px, 5vw, 84px) 122px;
  pointer-events: none;
}

.detail-page.active {
  display: block;
  pointer-events: auto;
}

.detail-content {
  width: min(980px, 84vw);
  margin: 0 auto;
}

.detail-content h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 3.5vw, 58px);
  color: rgba(74, 74, 74, 0.92);
}

.detail-subtitle {
  margin: -4px 0 20px;
  color: rgba(122, 122, 122, 0.9);
  font-size: clamp(13px, 1.02vw, 17px);
}

.detail-copy {
  margin: 12px 0 18px;
  font-size: clamp(14px, 1.08vw, 18px);
  line-height: 1.45;
  color: rgba(109, 109, 109, 0.92);
}

.detail-rich-content {
  margin-top: clamp(34px, 5vh, 58px);
}

.detail-segment + .detail-segment {
  margin-top: clamp(20px, 3.6vh, 44px);
}

.detail-text {
  max-width: 900px;
  margin: clamp(32px, 4.8vh, 44px) auto 0;
  font-size: clamp(14px, 1.02vw, 17px);
  line-height: 1.8;
  color: rgba(90, 90, 90, 0.9);
}

.detail-text p {
  margin: 0;
}

.detail-images {
  max-width: 1100px;
  margin: clamp(30px, 4.4vh, 42px) auto 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.detail-images img {
  width: 100%;
  display: block;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.detail-images-empty {
  margin: 0;
  padding: 16px 18px;
  border-radius: 10px;
  border: 1px dashed rgba(205, 205, 205, 0.72);
  color: rgba(122, 122, 122, 0.86);
  background: rgba(249, 249, 249, 0.92);
  font-size: clamp(12px, 0.9vw, 14px);
  line-height: 1.5;
}

.detail-block {
  width: 100%;
  min-height: 180px;
  border: 1px solid rgba(194, 194, 194, 0.42);
  background: linear-gradient(180deg, rgba(241, 241, 241, 0.95), rgba(228, 228, 228, 0.86));
  border-radius: 6px;
}

.detail-block-hero {
  min-height: 320px;
  overflow: hidden;
}

.detail-block-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.detail-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: 12px;
}

.detail-placeholder {
  margin-top: 18px;
  padding: clamp(20px, 2vw, 28px);
  border-radius: 8px;
  border: 1px solid rgba(210, 210, 210, 0.52);
  color: rgba(118, 118, 118, 0.88);
  background: linear-gradient(180deg, rgba(248, 248, 248, 0.96), rgba(241, 241, 241, 0.92));
  font-size: clamp(13px, 0.92vw, 15px);
  line-height: 1.5;
}

.detail-copy-link {
  margin-top: 2px;
}

.detail-inline-link {
  color: rgba(102, 102, 102, 0.94);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  word-break: break-all;
}

.detail-inline-link:hover {
  color: rgba(74, 74, 74, 0.96);
}

.ds01-stack {
  margin-top: clamp(70px, 9.5vh, 128px);
  margin-bottom: clamp(96px, 13vh, 176px);
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.ds01-stack-item {
  position: relative;
  margin: 0;
  width: clamp(190px, 22vw, 300px);
  transform: translateY(var(--stack-y, 0)) rotate(var(--stack-r, 0deg));
  transition: transform 340ms var(--ease-soft), box-shadow 340ms var(--ease-soft);
  z-index: var(--stack-z, 1);
}

.ds01-stack-item + .ds01-stack-item {
  margin-left: clamp(-102px, -6.2vw, -46px);
}

.ds01-stack-item img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  box-shadow: 0 14px 34px rgba(24, 24, 24, 0.14);
}

.ds01-stack-item:nth-child(1) {
  --stack-r: -6deg;
  --stack-y: 24px;
  --stack-z: 2;
}

.ds01-stack-item:nth-child(2) {
  --stack-r: -2deg;
  --stack-y: 8px;
  --stack-z: 4;
}

.ds01-stack-item:nth-child(3) {
  --stack-r: 2deg;
  --stack-y: 0;
  --stack-z: 5;
}

.ds01-stack-item:nth-child(4) {
  --stack-r: 6deg;
  --stack-y: 20px;
  --stack-z: 3;
}

.ds01-stack-item:hover {
  z-index: 12;
  transform: translateY(calc(var(--stack-y, 0px) - 8px)) rotate(var(--stack-r, 0deg)) scale(1.045);
}

.ds01-stack-item:hover img {
  box-shadow: 0 20px 44px rgba(24, 24, 24, 0.2);
}

.detail-summary-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: clamp(10px, 1.2vw, 18px);
}

.detail-section-block {
  margin: 0;
  padding: clamp(14px, 1.45vw, 20px);
  border-radius: 8px;
  background: rgba(248, 248, 248, 0.84);
  border: 1px solid rgba(216, 216, 216, 0.46);
}

.detail-section-block h3 {
  margin: 0 0 7px;
  font-size: clamp(13px, 0.95vw, 16px);
  font-weight: 600;
  color: rgba(84, 84, 84, 0.9);
}

.detail-section-block p {
  margin: 0;
  line-height: 1.5;
  font-size: clamp(12px, 0.92vw, 15px);
  color: rgba(110, 110, 110, 0.94);
}

.detail-media-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: clamp(10px, 1.2vw, 18px);
}

.detail-media-item {
  margin: 0;
  border-radius: 8px;
  border: 1px solid rgba(214, 214, 214, 0.5);
  background: rgba(249, 249, 249, 0.95);
  overflow: hidden;
}

.detail-media-item img {
  display: block;
  width: 100%;
  height: auto;
}

.detail-media-fallback {
  margin: 0;
  padding: 16px;
  border-radius: 8px;
  border: 1px dashed rgba(205, 205, 205, 0.72);
  color: rgba(122, 122, 122, 0.86);
  background: rgba(249, 249, 249, 0.92);
  font-size: clamp(12px, 0.9vw, 14px);
  line-height: 1.5;
  grid-column: 1 / span 2;
}

.detail-return-indicator {
  position: absolute;
  left: 50%;
  bottom: 2.5%;
  transform: translateX(-50%);
  z-index: 280;
  border: 1px solid rgba(167, 167, 167, 0.36);
  background: rgba(255, 255, 255, 0.82);
  border-radius: 999px;
  padding: 0.56rem 1.1rem;
  color: rgba(96, 96, 96, 0.8);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(8px);
  transition: opacity 280ms ease;
}

.detail-return-arrow {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid rgba(118, 118, 118, 0.72);
  border-bottom: 1.5px solid rgba(118, 118, 118, 0.72);
  transform: rotate(45deg);
}

.scene[data-state="detail"] .detail-return-indicator {
  opacity: 1;
  pointer-events: auto;
}

.scene[data-state="home"] .home-headline {
  opacity: 1;
  transform: translate3d(-50%, 0, 0);
}

.scene[data-state="home"] .menu-headline {
  opacity: 0;
  transform: translate3d(16px, 0, 0);
}

.scene[data-state="home"] .scroll-indicator {
  opacity: 1;
  pointer-events: auto;
  animation: hintGlow 2.4s ease-in-out infinite;
}

.scene[data-state="home"] .scroll-indicator .scroll-text {
  font-size: clamp(14px, 1.1vw, 18px);
  font-weight: 400;
  padding: 0;
  color: rgba(54, 54, 54, 0.92);
  background: none;
  border: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.scene[data-state="home"] .scroll-indicator .scroll-arrow {
  width: 36px;
  height: 34px;
  border: none;
  border-radius: 0;
  background: none;
  box-shadow: none;
}

.scene[data-state="home"] .scroll-indicator .scroll-arrow::before,
.scene[data-state="home"] .scroll-indicator .scroll-arrow::after {
  width: 12px;
  height: 12px;
  border-right: 2px solid rgba(78, 78, 78, 0.9);
  border-bottom: 2px solid rgba(78, 78, 78, 0.9);
}

.scene[data-state="home"] .scroll-indicator .scroll-arrow::before {
  top: 3px;
}

.scene[data-state="home"] .scroll-indicator .scroll-arrow::after {
  top: 14px;
}

.scene:not([data-state="home"]) .scroll-indicator {
  opacity: 0;
  pointer-events: none;
}

.scene[data-state="menu-transition"] .front-page-bg,
.scene[data-state="menu"] .front-page-bg,
.scene[data-state="section-transition"] .front-page-bg,
.scene[data-state="section"] .front-page-bg,
.scene[data-state="menu-returning-prep"] .front-page-bg,
.scene[data-state="menu-returning"] .front-page-bg,
.scene[data-state="detail"] .front-page-bg {
  opacity: 0;
  transform: scale(1.02);
  filter: blur(2px);
}

.scene[data-state="menu-transition"] .grass,
.scene[data-state="menu"] .grass,
.scene[data-state="section-transition"] .grass,
.scene[data-state="section"] .grass,
.scene[data-state="menu-returning-prep"] .grass,
.scene[data-state="menu-returning"] .grass,
.scene[data-state="detail"] .grass {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.scene[data-state="menu-transition"] .home-headline,
.scene[data-state="menu"] .home-headline,
.scene[data-state="section-transition"] .home-headline,
.scene[data-state="section"] .home-headline,
.scene[data-state="menu-returning-prep"] .home-headline,
.scene[data-state="menu-returning"] .home-headline,
.scene[data-state="detail"] .home-headline {
  opacity: 0;
  transform: translate3d(-50%, -16px, 0);
}

.scene[data-state="menu-transition"] .menu-headline,
.scene[data-state="menu"] .menu-headline,
.scene[data-state="menu-returning-prep"] .menu-headline,
.scene[data-state="menu-returning"] .menu-headline {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.scene[data-state="section-transition"] .menu-headline,
.scene[data-state="section"] .menu-headline,
.scene[data-state="detail"] .menu-headline {
  opacity: 0;
  transform: translate3d(16px, -10px, 0);
}

.scene[data-state="menu-transition"] .scroll-indicator,
.scene[data-state="menu"] .scroll-indicator,
.scene[data-state="section-transition"] .scroll-indicator,
.scene[data-state="section"] .scroll-indicator,
.scene[data-state="menu-returning-prep"] .scroll-indicator,
.scene[data-state="menu-returning"] .scroll-indicator,
.scene[data-state="detail"] .scroll-indicator {
  opacity: 0;
  pointer-events: none;
}

.scene[data-state="section-transition"] .section-up-indicator,
.scene[data-state="section"] .section-up-indicator {
  opacity: 1;
  pointer-events: auto;
}

.scene[data-state="section-transition"][data-section="about-xingyuan"] .section-up-indicator,
.scene[data-state="section"][data-section="about-xingyuan"] .section-up-indicator {
  opacity: 0;
  pointer-events: none;
}

.scene[data-state="home"] .section-up-indicator,
.scene[data-state="menu-transition"] .section-up-indicator,
.scene[data-state="menu"] .section-up-indicator,
.scene[data-state="menu-returning-prep"] .section-up-indicator,
.scene[data-state="menu-returning"] .section-up-indicator,
.scene[data-state="detail"] .section-up-indicator {
  opacity: 0;
  pointer-events: none;
}

.scene[data-state="section"] .menu-bg,
.scene[data-state="detail"] .menu-bg {
  transform: scale(1.01);
}

@keyframes planetFloat {
  0% {
    translate: 0 0;
  }

  50% {
    translate: 0 -11px;
  }

  100% {
    translate: 0 0;
  }
}

@keyframes sectionSpin {
  0% {
    rotate: 0deg;
  }

  100% {
    rotate: 360deg;
  }
}

@keyframes glowPulse {
  0%,
  100% {
    filter: drop-shadow(0 0 12px var(--glow));
  }

  50% {
    filter: drop-shadow(0 0 23px var(--glow));
  }
}

@keyframes titleFloat {
  0%,
  100% {
    translate: 0 0;
  }

  50% {
    translate: 0 -7px;
  }
}

@keyframes arrowDownPulse {
  0% {
    opacity: 0.22;
    transform: translate(-50%, -2px) rotate(45deg);
  }

  50% {
    opacity: 0.8;
    transform: translate(-50%, 2px) rotate(45deg);
  }

  100% {
    opacity: 0.24;
    transform: translate(-50%, 5px) rotate(45deg);
  }
}

@keyframes arrowUpPulse {
  0% {
    opacity: 0.22;
    transform: translate(-50%, 5px) rotate(225deg);
  }

  50% {
    opacity: 0.8;
    transform: translate(-50%, 2px) rotate(225deg);
  }

  100% {
    opacity: 0.24;
    transform: translate(-50%, -2px) rotate(225deg);
  }
}

@keyframes hintGlow {
  0%,
  100% {
    opacity: 0.7;
  }

  50% {
    opacity: 1;
  }
}

@keyframes mobilePlanetLabelGroupFade {
  0% {
    opacity: 0;
    transform: translate(-50%, -46%) scale(0.984);
    filter: blur(0.6px) saturate(0.96);
  }

  18% {
    opacity: 0.64;
    transform: translate(-50%, -50%) scale(1);
    filter: blur(0) saturate(1);
  }

  58% {
    opacity: 0.68;
    transform: translate(-50%, -50%) scale(1.004);
    filter: blur(0) saturate(1.02);
  }

  84% {
    opacity: 0.26;
    transform: translate(-50%, -52%) scale(0.994);
    filter: blur(0.3px) saturate(0.98);
  }

  100% {
    opacity: 0;
    transform: translate(-50%, -54%) scale(0.99);
    filter: blur(0.5px) saturate(0.96);
  }
}

@keyframes aboutHintBreath {
  0%,
  100% {
    opacity: 0.82;
    transform: translateX(-50%) translateY(0);
  }

  50% {
    opacity: 1;
    transform: translateX(-50%) translateY(-3px);
  }
}

@media (max-width: 1100px) {
  .cards-ml {
    margin-left: clamp(80px, 12vw, 200px);
  }

  .cards-digital,
  .cards-ds,
  .cards-aigc,
  .cards-visual {
    width: min(82vw, 920px);
  }

  .cards-visual {
    margin-left: 0;
  }
}

@media (max-width: 768px) and (orientation: portrait) {
  /* ML small-screen scroll fix: allow vertical browsing inside the section before any return action. */
  .section-page[data-section="ml-coding"] .section-scroll-locked {
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
  }

  .home-headline {
    /* Mobile home title upward adjustment: keep centered, but clearly higher in the viewport. */
    left: 50%;
    right: auto;
    width: clamp(78vw, 82vw, 86vw);
    top: clamp(2.8vh, 4.6vh, 6.8vh);
    transform: translate3d(-50%, 0, 0);
  }

  .menu-headline {
    /* Mobile menu title upper-right reposition: do not center this title in small screens. */
    left: auto;
    right: clamp(1.8vw, 3.4vw, 5.2vw);
    top: clamp(2.6vh, 4.4vh, 6.6vh);
    width: clamp(60vw, 70vw, 76vw);
    transform: translate3d(0, 0, 0);
    transform-origin: top right;
  }

  .scene[data-state="home"] .menu-headline {
    transform: translate3d(0, 0, 0);
  }

  .scene[data-state="menu-transition"] .menu-headline,
  .scene[data-state="menu"] .menu-headline,
  .scene[data-state="menu-returning-prep"] .menu-headline,
  .scene[data-state="menu-returning"] .menu-headline {
    transform: translate3d(0, 0, 0);
  }

  .scene[data-state="section-transition"] .menu-headline,
  .scene[data-state="section"] .menu-headline,
  .scene[data-state="detail"] .menu-headline {
    transform: translate3d(0, -10px, 0);
  }

  .top-nav {
    top: clamp(14px, 3.6vh, 30px);
    right: clamp(16px, 5vw, 34px);
    max-width: min(88vw, 540px);
    gap: clamp(9px, 2.2vw, 14px);
    row-gap: 0;
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-items: center;
  }

  /* Navigation alignment fix: keep all items on a clean horizontal baseline. */
  .top-nav > .nav-link,
  .top-nav > .nav-item {
    display: inline-flex;
    align-items: center;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(12px, 3.7vw, 15px);
    padding: clamp(2px, 0.4vh, 5px) clamp(3px, 1vw, 8px);
    line-height: 1.1;
    white-space: nowrap;
  }

  .nav-item {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
  }

  .nav-item-portfolio::after {
    left: -8px;
    right: -8px;
  }

  .portfolio-submenu {
    right: 0;
    top: calc(100% + 6px);
    min-width: min(68vw, 250px);
    max-width: min(86vw, 330px);
    padding: clamp(6px, 1.6vw, 10px);
    gap: clamp(4px, 1vw, 7px);
  }

  .submenu-link {
    font-size: clamp(11px, 2.8vw, 13px);
    line-height: 1.25;
    white-space: normal;
  }

  .planet-label {
    padding: clamp(0.34rem, 1vw, 0.5rem) clamp(0.72rem, 2.6vw, 1rem);
    font-size: clamp(11px, 3vw, 14px);
    max-width: min(86vw, 420px);
    text-align: center;
  }

  .scene[data-state="home"] .planet-orange {
    left: 1.5%;
    top: 28%;
    width: 26%;
  }

  .scene[data-state="home"] .planet-blue {
    left: 11%;
    top: 50%;
    width: 20%;
  }

  .scene[data-state="home"] .planet-pink {
    left: 33%;
    top: 71%;
    width: 16%;
  }

  .scene[data-state="home"] .planet-white {
    left: 43%;
    top: 40%;
    width: 28%;
  }

  .scene[data-state="home"] .planet-green {
    left: 66%;
    top: 56%;
    width: 27%;
  }

  .scene[data-state="home"] .planet-purple {
    left: 73%;
    top: 22%;
    width: 14%;
  }

  .scene[data-state="menu-transition"] .planet-orange,
  .scene[data-state="menu"] .planet-orange,
  .scene[data-state="section-transition"] .planet-orange {
    left: -2%;
    top: 24%;
    width: 24%;
  }

  .scene[data-state="menu-transition"] .planet-blue,
  .scene[data-state="menu"] .planet-blue,
  .scene[data-state="section-transition"] .planet-blue {
    left: 9%;
    top: 50%;
    width: 22%;
  }

  .scene[data-state="menu-transition"] .planet-pink,
  .scene[data-state="menu"] .planet-pink,
  .scene[data-state="section-transition"] .planet-pink {
    left: 33%;
    top: 73%;
    width: 17%;
  }

  .scene[data-state="menu-transition"] .planet-white,
  .scene[data-state="menu"] .planet-white,
  .scene[data-state="section-transition"] .planet-white {
    left: 43%;
    top: 38%;
    width: 31%;
  }

  .scene[data-state="menu-transition"] .planet-green,
  .scene[data-state="menu"] .planet-green,
  .scene[data-state="section-transition"] .planet-green {
    left: 67%;
    top: 56%;
    width: 27%;
  }

  .scene[data-state="menu-transition"] .planet-purple,
  .scene[data-state="menu"] .planet-purple,
  .scene[data-state="section-transition"] .planet-purple {
    left: 73%;
    top: 24%;
    width: 14%;
  }

  .scroll-indicator,
  .section-up-indicator {
    gap: clamp(4px, 1vh, 8px);
    max-width: calc(100vw - 20px);
  }

  .scroll-indicator {
    bottom: clamp(10px, 2.8vh, 22px);
  }

  .section-up-indicator {
    top: clamp(10px, 2.2vh, 18px);
  }

  .scroll-text,
  .section-up-text {
    font-size: clamp(10px, 2.8vw, 13px);
  }

  .scroll-indicator .scroll-text {
    padding: clamp(0.14rem, 0.5vh, 0.28rem) clamp(0.56rem, 2.4vw, 0.8rem);
  }

  .scroll-arrow,
  .section-up-arrow {
    width: clamp(18px, 5.6vw, 22px);
    height: clamp(30px, 9vw, 35px);
  }

  .detail-return-indicator {
    bottom: clamp(10px, 2.8vh, 24px);
    padding: clamp(0.44rem, 1.5vw, 0.56rem) clamp(0.88rem, 3.6vw, 1.1rem);
    gap: clamp(6px, 1.8vw, 8px);
    font-size: clamp(11px, 3.2vw, 14px);
    max-width: calc(100vw - 20px);
  }

  .section-page {
    padding: clamp(72px, 10.5vh, 104px) clamp(12px, 4vw, 20px) clamp(24px, 4vh, 44px);
  }

  .section-bg-title {
    top: clamp(88px, 13vh, 118px);
    left: clamp(14px, 4vw, 24px);
    font-size: clamp(22px, 7.8vw, 42px);
  }

  /* Mobile/tablet upward shift for non-digital-media sections: lift gray title + card groups. */
  .section-page[data-section="ml-coding"] .section-bg-title,
  .section-page[data-section="ds-data-science"] .section-bg-title,
  .section-page[data-section="visual-design"] .section-bg-title {
    top: clamp(76px, 11.3vh, 104px);
  }

  .section-page[data-section="aigc"] .section-bg-title {
    top: clamp(66px, 10.2vh, 96px);
  }

  .section-scroll-locked {
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
  }

  .cards {
    width: min(92vw, 560px);
    margin-left: auto !important;
    margin-right: auto !important;
    gap: clamp(10px, 2vh, 16px);
    padding-top: clamp(86px, 12vh, 124px);
    padding-bottom: clamp(46px, 8vh, 86px);
  }

  .cards-ml,
  .cards-digital,
  .cards-ds,
  .cards-aigc,
  .cards-visual {
    width: min(92vw, 560px);
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto;
    margin-left: auto !important;
    margin-right: auto !important;
    padding-top: clamp(86px, 12vh, 124px);
    gap: clamp(10px, 2vh, 16px);
  }

  /* Digital Media card position adjustment: shift upward so users notice there is more content below. */
  .section-page[data-section="digital-media"] .cards-digital {
    margin-top: clamp(-16px, -2.6vh, -8px);
    padding-top: clamp(72px, 10vh, 108px);
    padding-bottom: clamp(56px, 9vh, 102px);
  }

  .section-page[data-section="ml-coding"] .cards-ml {
    align-content: start;
    height: auto;
    margin-top: clamp(-14px, -2.4vh, -6px);
    padding-bottom: clamp(62px, 10vh, 110px);
  }

  .section-page[data-section="ds-data-science"] .cards-ds {
    margin-top: clamp(-18px, -3vh, -8px);
    padding-top: clamp(78px, 10.8vh, 116px);
  }

  .section-page[data-section="aigc"] .cards-aigc {
    margin-top: clamp(-34px, -5.2vh, -18px);
    padding-top: clamp(66px, 9.4vh, 102px);
  }

  .section-page[data-section="visual-design"] .cards-visual {
    margin-top: clamp(-16px, -2.7vh, -8px);
    padding-top: clamp(78px, 10.8vh, 114px);
  }

  .cards-ml .project-card:nth-child(1),
  .cards-ml .project-card:nth-child(2),
  .cards-ml .project-card:nth-child(3),
  .cards-ds .card-wide,
  .cards-aigc .project-card:nth-child(1),
  .cards-aigc .project-card:nth-child(2) {
    grid-column: auto;
    grid-row: auto;
    min-height: auto;
    margin-top: 0;
    align-self: auto;
  }

  .cards-aigc .project-card,
  .cards-visual .project-card {
    min-height: auto;
  }

  .project-card {
    padding: 8px 8px 11px;
  }

  .tilt-left {
    --tilt: -0.5deg;
  }

  .tilt-right {
    --tilt: 0.5deg;
  }

  .project-card:hover,
  .project-card:focus-visible {
    transform: rotate(var(--tilt, 0deg)) translateY(-2px) scale(1.012);
  }

  .project-card h3 {
    font-size: clamp(14px, 4.2vw, 19px);
  }

  .project-card p {
    font-size: clamp(12px, 3.5vw, 15px);
    line-height: 1.42;
  }

  .card-cover,
  .cards-ml .project-card:nth-child(1) .card-cover,
  .cards-ml .project-card:nth-child(2) .card-cover,
  .cards-ml .project-card:nth-child(3) .card-cover,
  .cards-ds .card-wide .card-cover,
  .cards-aigc .project-card:nth-child(1) .card-cover,
  .cards-visual .card-cover {
    height: clamp(170px, 29vh, 250px);
  }

  .detail-page {
    padding: clamp(74px, 10vh, 98px) clamp(12px, 4.2vw, 20px) clamp(96px, 15vh, 132px);
  }

  .detail-content {
    width: min(100%, 94vw);
  }

  .detail-content h1 {
    margin-bottom: 14px;
    font-size: clamp(24px, 7.6vw, 40px);
  }

  .detail-subtitle {
    margin-bottom: 14px;
    font-size: clamp(12px, 3.4vw, 15px);
  }

  .detail-copy {
    margin: 10px 0 14px;
    font-size: clamp(13px, 3.5vw, 16px);
  }

  .detail-rich-content {
    margin-top: clamp(24px, 4.2vh, 36px);
  }

  .detail-segment + .detail-segment {
    margin-top: clamp(16px, 2.8vh, 28px);
  }

  .detail-text {
    max-width: min(100%, 900px);
    margin: clamp(22px, 3.8vh, 32px) auto 0;
    font-size: clamp(13px, 3.5vw, 16px);
    line-height: 1.72;
  }

  .detail-images {
    max-width: min(100%, 1100px);
    margin: clamp(20px, 3.4vh, 30px) auto 0;
    gap: clamp(14px, 2.6vh, 22px);
  }

  .detail-images img {
    border-radius: 12px;
  }

  .detail-grid,
  .detail-summary-grid,
  .detail-media-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(10px, 2vh, 16px);
  }

  .detail-media-fallback {
    grid-column: auto;
  }

  .detail-block-hero {
    min-height: clamp(190px, 32vh, 280px);
  }

  .detail-block-hero img,
  .detail-media-item img,
  .ds01-stack-item img {
    width: 100%;
    max-width: 100%;
    height: auto;
  }

  .ds01-stack {
    margin-top: clamp(40px, 7vh, 74px);
    margin-bottom: clamp(54px, 9vh, 102px);
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    gap: clamp(10px, 2vh, 16px);
  }

  .ds01-stack-item {
    --stack-y: 0px;
    width: min(88vw, 440px);
    max-width: 100%;
    transform: rotate(var(--stack-r, 0deg));
  }

  .ds01-stack-item + .ds01-stack-item {
    margin-left: 0;
  }

  .ds01-stack-item:hover {
    transform: rotate(var(--stack-r, 0deg)) scale(1.012);
  }

  /* Mobile/tablet About page upward expansion: fuller vertical coverage with less top blank space. */
  .section-about .about-scroll {
    padding-top: clamp(0px, 0.8vh, 6px);
    padding-bottom: clamp(8px, 1.8vh, 18px);
  }

  .section-about .about-scene {
    min-height: 104svh;
  }

  .about-scene-headline {
    width: clamp(180px, 52vw, 320px);
  }

  .section-about .about-scene-headline-left {
    top: clamp(8px, 2vh, 18px);
    left: clamp(12px, 3.6vw, 20px);
  }

  .section-about .about-scene-headline-right {
    top: clamp(8px, 2vh, 18px);
    right: clamp(12px, 3.6vw, 20px);
  }

  .about-scene-hint {
    bottom: clamp(12px, 2.6vh, 24px);
    padding: 0.16rem 0.5rem 0.68rem;
    font-size: clamp(11px, 3vw, 14px);
    max-width: calc(100vw - 30px);
  }
}

@media (max-width: 1024px) and (orientation: landscape) {
  /* ML small-screen scroll fix: keep ML cards fully reachable in compact landscape windows. */
  .section-page[data-section="ml-coding"] .section-scroll-locked {
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
  }

  .home-headline {
    /* Mobile home title upward adjustment (tablet landscape / small-window). */
    width: clamp(440px, 45vw, 760px);
    top: 2.6%;
  }

  .menu-headline {
    /* Mobile menu title upper-right adjustment (tablet landscape / small-window): push further right/up. */
    right: 1.8%;
    top: 2.8%;
    width: clamp(400px, 40vw, 700px);
    transform-origin: top right;
  }

  .top-nav {
    top: 3.5%;
    right: 3.8%;
    max-width: min(58vw, 700px);
    gap: clamp(9px, 0.92vw, 16px);
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-items: center;
  }

  /* Navigation alignment fix: keep all items on a clean horizontal baseline. */
  .top-nav > .nav-link,
  .top-nav > .nav-item {
    display: inline-flex;
    align-items: center;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(11px, 1.24vw, 16px);
    white-space: nowrap;
    line-height: 1.1;
    padding: 0 clamp(2px, 0.45vw, 6px);
  }

  .nav-item {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
  }

  .portfolio-submenu {
    min-width: min(34vw, 270px);
  }

  .scroll-indicator {
    bottom: clamp(10px, 3vh, 24px);
  }

  .section-up-indicator {
    top: clamp(8px, 2vh, 18px);
  }

  .detail-return-indicator {
    bottom: clamp(10px, 2.4vh, 22px);
    padding: clamp(0.46rem, 1.2vw, 0.56rem) clamp(0.92rem, 2.2vw, 1.1rem);
  }

  .scene[data-state="home"] .planet-orange {
    left: -5%;
    top: 38%;
    width: 25%;
  }

  .scene[data-state="home"] .planet-blue {
    left: 19.5%;
    top: 50.5%;
    width: 15%;
  }

  .scene[data-state="home"] .planet-pink {
    left: 42.4%;
    top: 59%;
    width: 10.6%;
  }

  .scene[data-state="home"] .planet-white {
    left: 55.6%;
    top: 45.5%;
    width: 17.2%;
  }

  .scene[data-state="home"] .planet-green {
    left: 72.2%;
    top: 34.3%;
    width: 26.5%;
  }

  .scene[data-state="home"] .planet-purple {
    left: 74.5%;
    top: 66%;
    width: 15.4%;
  }

  .scene[data-state="menu-transition"] .planet-orange,
  .scene[data-state="menu"] .planet-orange,
  .scene[data-state="section-transition"] .planet-orange {
    left: -14.5%;
    top: -32%;
    width: 42%;
  }

  .scene[data-state="menu-transition"] .planet-blue,
  .scene[data-state="menu"] .planet-blue,
  .scene[data-state="section-transition"] .planet-blue {
    left: -3.6%;
    top: 43.4%;
    width: 21.2%;
  }

  .scene[data-state="menu-transition"] .planet-pink,
  .scene[data-state="menu"] .planet-pink,
  .scene[data-state="section-transition"] .planet-pink {
    left: 26%;
    top: 67.5%;
    width: 19%;
  }

  .scene[data-state="menu-transition"] .planet-white,
  .scene[data-state="menu"] .planet-white,
  .scene[data-state="section-transition"] .planet-white {
    left: 40.5%;
    top: 25.4%;
    width: 24.8%;
  }

  .scene[data-state="menu-transition"] .planet-green,
  .scene[data-state="menu"] .planet-green,
  .scene[data-state="section-transition"] .planet-green {
    left: 71.2%;
    top: 55%;
    width: 35.6%;
  }

  .scene[data-state="menu-transition"] .planet-purple,
  .scene[data-state="menu"] .planet-purple,
  .scene[data-state="section-transition"] .planet-purple {
    left: 14.2%;
    top: 19.4%;
    width: 13.5%;
  }

  .section-page {
    padding: clamp(80px, 11vh, 114px) clamp(24px, 3.2vw, 44px) clamp(26px, 4vh, 50px);
  }

  .section-bg-title {
    top: clamp(94px, 13.6vh, 132px);
    left: clamp(28px, 3.8vw, 56px);
    font-size: clamp(30px, 4.2vw, 62px);
  }

  /* Mobile/tablet upward shift for non-digital-media sections: keep content composition higher than default. */
  .section-page[data-section="ml-coding"] .section-bg-title,
  .section-page[data-section="ds-data-science"] .section-bg-title,
  .section-page[data-section="visual-design"] .section-bg-title {
    top: clamp(82px, 12.2vh, 118px);
  }

  .section-page[data-section="aigc"] .section-bg-title {
    top: clamp(74px, 11.1vh, 108px);
  }

  .cards {
    gap: clamp(12px, 1.6vw, 20px);
    padding-top: clamp(78px, 10vh, 128px);
  }

  .cards-ml {
    margin-left: clamp(48px, 8vw, 154px);
    width: min(86vw, 1040px);
    grid-template-columns: minmax(300px, 1.02fr) minmax(240px, 0.98fr);
  }

  .section-page[data-section="ml-coding"] .cards-ml {
    align-content: start;
    height: auto;
    margin-top: clamp(-10px, -1.8vh, -4px);
    padding-bottom: clamp(40px, 8vh, 90px);
  }

  .cards-digital,
  .cards-ds,
  .cards-aigc,
  .cards-visual {
    width: min(86vw, 980px);
  }

  /* Digital Media card position adjustment: keep the first cards slightly higher in small landscape. */
  .section-page[data-section="digital-media"] .cards-digital {
    margin-top: clamp(-10px, -1.8vh, -4px);
    padding-top: clamp(68px, 9vh, 108px);
  }

  .cards-aigc {
    margin-left: clamp(8px, 1vw, 18px);
    grid-template-columns: minmax(360px, 1.2fr) minmax(260px, 0.8fr);
    gap: clamp(16px, 1.8vw, 28px);
  }

  .section-page[data-section="ds-data-science"] .cards-ds {
    margin-top: clamp(-12px, -2.2vh, -6px);
    padding-top: clamp(72px, 9.4vh, 114px);
  }

  .section-page[data-section="aigc"] .cards-aigc {
    margin-top: clamp(-26px, -4vh, -14px);
    padding-top: clamp(64px, 8.6vh, 100px);
  }

  .cards-visual {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }

  .section-page[data-section="visual-design"] .cards-visual {
    margin-top: clamp(-10px, -1.8vh, -4px);
    padding-top: clamp(72px, 9.4vh, 112px);
  }

  .detail-page {
    padding: clamp(78px, 11vh, 106px) clamp(22px, 4vw, 48px) clamp(96px, 14vh, 126px);
  }

  .detail-content {
    width: min(920px, 88vw);
  }

  .detail-content h1 {
    font-size: clamp(28px, 3.4vw, 46px);
  }

  .detail-copy {
    font-size: clamp(13px, 1.35vw, 16px);
  }

  .detail-rich-content {
    margin-top: clamp(28px, 4.2vh, 42px);
  }

  .detail-segment + .detail-segment {
    margin-top: clamp(18px, 3.2vh, 34px);
  }

  .detail-text {
    margin: clamp(26px, 3.8vh, 38px) auto 0;
    font-size: clamp(13px, 1.3vw, 16px);
  }

  .detail-images {
    margin: clamp(22px, 3.4vh, 34px) auto 0;
    gap: clamp(18px, 2.4vh, 26px);
  }

  .detail-grid,
  .detail-summary-grid,
  .detail-media-grid {
    grid-template-columns: repeat(2, minmax(200px, 1fr));
  }

  .ds01-stack-item {
    width: clamp(160px, 20vw, 260px);
  }

  .ds01-stack-item + .ds01-stack-item {
    margin-left: clamp(-84px, -5.8vw, -40px);
  }

  .about-scene-headline {
    width: clamp(220px, 23vw, 360px);
  }

  /* Mobile/tablet About page upward expansion: fill more of the top viewport area in small landscape layouts. */
  .section-about .about-scroll {
    height: 100%;
    padding-top: 0;
    scroll-snap-type: y mandatory;
  }

  .section-about .about-scene {
    min-height: 104%;
    height: 104%;
    background: rgba(244, 244, 244, 0.8);
  }

  .section-about .about-scene-bg,
  .section-about .about-scene-fg {
    object-fit: contain;
    object-position: center 42%;
  }

  .section-about .about-scene.is-current .about-scene-fg {
    transform: translate3d(0, -8px, 0) rotateY(0deg) scale(1.01);
  }

  .section-about .about-scene:not(.is-current) .about-scene-fg {
    transform: translate3d(0, -18px, 0) rotateY(-8deg) scale(1.01);
  }

  .section-about .about-scene-headline-left,
  .section-about .about-scene-headline-right {
    top: clamp(4px, 1.2vh, 14px);
  }

  .about-scene-hint {
    bottom: clamp(12px, 2.2vh, 24px);
  }
}

/* Portrait detection improvement (incl. iPad): JS toggles this class for touch portrait devices. */
.mobile-portrait-gate.is-visible {
  display: flex;
  pointer-events: auto;
}

body.mobile-portrait-gate-active .site-shell {
  pointer-events: none;
  user-select: none;
}

/* About small-window mode optimization: keep full-screen atmosphere and smoother scene transitions. */
@media (max-width: 1024px) {
  /* Mobile/tablet About page upward expansion: reduce top blank area and push visuals upward. */
  .section-about .about-scroll {
    height: 100%;
    padding-top: 0;
    overflow-y: auto;
    scroll-snap-type: y proximity;
    scroll-behavior: smooth;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
  }

  .section-about .about-scene {
    min-height: 104svh;
    height: 104svh;
  }

  .section-about .about-scene::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: linear-gradient(
      to bottom,
      rgba(245, 245, 245, 0.2) 0%,
      rgba(245, 245, 245, 0.02) 28%,
      rgba(245, 245, 245, 0.02) 72%,
      rgba(245, 245, 245, 0.26) 100%
    );
  }

  .section-about .about-scene-bg {
    object-fit: cover;
    object-position: center 38%;
  }

  .section-about .about-scene-fg {
    object-fit: cover;
    object-position: center 42%;
    transform-origin: center 42%;
    transition:
      transform 520ms var(--ease-smooth),
      opacity 460ms ease,
      filter 420ms ease;
  }

  .section-about .about-scene.is-current .about-scene-fg {
    opacity: 1;
    transform: translate3d(0, -14px, 0) scale(1.06);
    filter: blur(0);
  }

  .section-about .about-scene:not(.is-current) .about-scene-fg {
    opacity: 0.62;
    transform: translate3d(0, -22px, 0) scale(1.07);
    filter: blur(0.4px);
  }

  .section-about .about-scene-headline {
    width: clamp(200px, 28vw, 340px);
  }

  .section-about .about-scene-headline-left {
    top: clamp(6px, 1.8vh, 18px);
    left: clamp(12px, 3.2vw, 28px);
  }

  .section-about .about-scene-headline-right {
    top: clamp(6px, 1.8vh, 18px);
    right: clamp(12px, 3.2vw, 28px);
  }

  .section-about .about-scene-hint {
    bottom: clamp(12px, 2.4vh, 26px);
  }
}