:root {
  --ink: #f7f4ef;
  --muted: rgba(247, 244, 239, 0.68);
  --soft: rgba(247, 244, 239, 0.1);
  --line: rgba(247, 244, 239, 0.16);
  --charcoal: #0b0b0c;
  --night: #14100f;
  --rose: #d7a39a;
  --gold: #c8aa76;
  --sage: #99aaa0;
  --blue: #8ba7bb;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ambient-x: 0%;
  --ambient-y: 0%;
  --ambient-grid-x: 0px;
  --ambient-grid-y: 0px;
  --ambient-grid-alt-x: 0px;
  --ambient-grid-alt-y: 0px;
  --ambient-line-y: 0px;
  --ambient-scroll: 0%;
  --ambient-depth-y: 0px;
  --ambient-sweep: -4%;
  --ambient-pulse: 0.58;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
  background: var(--charcoal);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 0%, rgba(215, 163, 154, 0.14), transparent 28rem),
    radial-gradient(circle at 84% 34%, rgba(139, 167, 187, 0.1), transparent 34rem),
    linear-gradient(180deg, #09090a 0%, #15100f 46%, #0a0c0c 100%);
  font-family:
    -apple-system, BlinkMacSystemFont,
    "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN",
    "Songti SC", "SimSun", "STSong", serif,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 400;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% var(--ambient-scroll), rgba(200, 170, 118, 0.14), transparent 28rem),
    linear-gradient(180deg, transparent 0%, rgba(215, 163, 154, 0.08) 52%, transparent 100%);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.ambient-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    linear-gradient(180deg, #070708 0%, #0f0c0c 44%, #070909 100%);
  isolation: isolate;
}

.ambient-backdrop::before,
.ambient-backdrop::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.ambient-backdrop::before {
  left: -18%;
  right: -18%;
  bottom: -38%;
  height: 78vh;
  z-index: 2;
  background-image:
    linear-gradient(rgba(247, 244, 239, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 244, 239, 0.075) 1px, transparent 1px);
  background-position:
    var(--ambient-grid-x) var(--ambient-grid-y),
    var(--ambient-grid-alt-x) var(--ambient-grid-alt-y);
  background-size: 5.5rem 5.5rem;
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.78) 28%, transparent 82%);
  opacity: 0.36;
  transform: perspective(52rem) rotateX(64deg) translate3d(0, var(--ambient-depth-y), 0);
  transform-origin: center bottom;
}

.ambient-backdrop::after {
  left: -14%;
  top: 32%;
  width: 128%;
  height: 18rem;
  z-index: 4;
  background:
    linear-gradient(90deg, transparent 0%, rgba(247, 244, 239, 0.02) 16%, rgba(200, 170, 118, 0.22) 48%, rgba(139, 167, 187, 0.12) 58%, transparent 84%),
    linear-gradient(180deg, transparent 0%, rgba(247, 244, 239, 0.1) 48%, transparent 100%);
  filter: blur(10px);
  opacity: var(--ambient-pulse);
  transform: translate3d(var(--ambient-sweep), var(--ambient-depth-y), 0) rotate(-7deg);
  mix-blend-mode: screen;
}

.ambient-field,
.ambient-grid,
.ambient-lines,
.ambient-grain {
  position: absolute;
  inset: -12%;
  will-change: transform, opacity;
}

.ambient-field {
  background:
    linear-gradient(114deg, transparent 3%, rgba(247, 244, 239, 0.09) 18%, transparent 34%),
    linear-gradient(28deg, transparent 14%, rgba(215, 163, 154, 0.12) 45%, transparent 66%),
    conic-gradient(from 124deg at 54% 48%, transparent 0deg, rgba(139, 167, 187, 0.12) 34deg, transparent 74deg, rgba(200, 170, 118, 0.1) 138deg, transparent 214deg, rgba(247, 244, 239, 0.05) 286deg, transparent 360deg);
  filter: blur(7px);
  opacity: 0.92;
  transform: translate3d(var(--ambient-x), var(--ambient-y), 0) scale(1.06);
}

.ambient-grid {
  inset: 0;
  background-image:
    linear-gradient(rgba(247, 244, 239, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 244, 239, 0.07) 1px, transparent 1px);
  background-position:
    var(--ambient-grid-x) var(--ambient-grid-y),
    var(--ambient-grid-alt-x) var(--ambient-grid-alt-y);
  background-size: 4.8rem 4.8rem;
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.92), transparent 78%);
  opacity: 0.44;
}

.ambient-lines {
  inset: 0;
  background:
    linear-gradient(115deg, transparent 2%, rgba(247, 244, 239, 0.09) 18%, transparent 38%),
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 10px);
  transform: translate3d(0, var(--ambient-line-y), 0);
  mix-blend-mode: screen;
  opacity: 0.34;
}

.ambient-grain {
  inset: 0;
  opacity: 0.15;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.45) 0 0.6px, transparent 0.8px),
    radial-gradient(circle at 72% 44%, rgba(255, 255, 255, 0.36) 0 0.5px, transparent 0.8px),
    radial-gradient(circle at 38% 82%, rgba(255, 255, 255, 0.3) 0 0.5px, transparent 0.8px);
  background-size: 3.5rem 3.5rem, 4.75rem 4.75rem, 6rem 6rem;
  mix-blend-mode: overlay;
}

main,
.site-header {
  position: relative;
}

main {
  z-index: 1;
}

.cursor-light {
  position: fixed;
  inset: auto;
  width: 18rem;
  height: 18rem;
  border-radius: 999px;
  pointer-events: none;
  z-index: 20;
  background: radial-gradient(circle, rgba(255, 234, 208, 0.13), transparent 65%);
  transform: translate(-50%, -50%);
  mix-blend-mode: screen;
}

.flight-path {
  position: fixed;
  inset: 0;
  z-index: 31;
  pointer-events: none;
  overflow: hidden;
  opacity: 0;
}

.flight-plane {
  position: absolute;
  left: 0;
  top: 0;
  width: clamp(2.35rem, 4vw, 3.85rem);
  aspect-ratio: 5 / 3;
  transform: translate3d(-8rem, -8rem, 0);
  transform-origin: 50% 50%;
  z-index: 33;
  filter:
    drop-shadow(0 0 1rem rgba(200, 170, 118, 0.32))
    drop-shadow(0 0.55rem 0.9rem rgba(0, 0, 0, 0.28));
  will-change: transform;
}

.flight-plane svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.plane-glow {
  fill: rgba(200, 170, 118, 0.16);
  transform: scale(1.08);
  transform-origin: center;
  filter: blur(9px);
}

.plane-shadow {
  fill: rgba(215, 163, 154, 0.22);
}

.plane-wing {
  stroke: rgba(200, 170, 118, 0.58);
  stroke-linejoin: round;
  stroke-width: 1.15;
}

.plane-wing-top {
  fill: rgba(247, 244, 239, 0.96);
}

.plane-wing-bottom {
  fill: rgba(229, 218, 200, 0.82);
}

.plane-fold,
.plane-spark {
  fill: none;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.plane-fold {
  stroke: rgba(94, 75, 53, 0.38);
  stroke-width: 1.1;
}

.plane-fold-lower {
  stroke: rgba(215, 163, 154, 0.42);
}

.plane-spark {
  stroke: rgba(200, 170, 118, 0.72);
  stroke-width: 1.35;
}

.flight-trail,
.flight-particle {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 32;
}

.flight-particle {
  width: var(--particle-length, 4.5rem);
  height: var(--particle-size, 0.18rem);
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent 0%, rgba(247, 244, 239, 0.08) 34%, rgba(200, 170, 118, 0.26) 72%, rgba(247, 244, 239, 0.4) 100%);
  box-shadow:
    0 0 0.7rem rgba(200, 170, 118, 0.18),
    0 0 1.4rem rgba(215, 163, 154, 0.12);
  transform: translate3d(-5rem, -5rem, 0) rotate(0deg) scaleX(0);
  transform-origin: 100% 50%;
  opacity: 0;
  mix-blend-mode: screen;
  will-change: transform, opacity;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  color: var(--ink);
  transition:
    background 0.4s var(--ease),
    border-color 0.4s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(11, 11, 12, 0.72);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand,
.desktop-nav,
.hero-actions,
.feature-grid,
.window-bar,
.hero-proof {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.6rem;
  font-weight: 700;
}

.brand-mark {
  width: 1.15rem;
  height: 1.15rem;
  border: 1px solid var(--gold);
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.28rem rgba(200, 170, 118, 0.16);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-en {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  opacity: 0.7;
}

.brand-cn {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.desktop-nav {
  gap: 1.5rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.desktop-nav a,
.header-cta {
  transition: color 0.25s var(--ease);
}

.desktop-nav a:hover {
  color: var(--ink);
}

.desktop-nav a.active {
  color: var(--gold);
  position: relative;
}

.desktop-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--gold);
  border-radius: 50%;
}

.header-cta {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.08);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr;
  align-items: end;
  padding: 7rem clamp(1.2rem, 6vw, 7rem) 4rem;
  overflow: hidden;
}

.hero-media,
.hero-media .hero-slider,
.hero-media .hero-slide,
.hero-media .hero-slide img,
.final-cta > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-slider {
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  will-change: opacity, transform;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
}

.hero-slide img,
.final-cta > img {
  object-fit: cover;
  filter: saturate(0.78) contrast(1.05);
  transform: scale(1.08);
}

.hero-media img,
.final-cta > img {
  object-fit: cover;
  filter: saturate(0.78) contrast(1.05);
  transform: scale(1.08);
}

.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(90deg, rgba(8, 7, 8, 0.85), rgba(8, 7, 8, 0.35) 52%, rgba(8, 7, 8, 0.82)),
    linear-gradient(0deg, #0b0b0c 0%, transparent 40%, rgba(0, 0, 0, 0.4) 100%),
    radial-gradient(ellipse at center, transparent 30%, rgba(0, 0, 0, 0.5) 100%);
}

.final-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    to top,
    rgba(8, 7, 8, 0.7) 0%,
    transparent 50%,
    rgba(8, 7, 8, 0.3) 100%
  );
}

.hero-dots {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.6rem;
  z-index: 10;
}

.hero-dot {
  width: 2.8rem;
  height: 0.25rem;
  border-radius: 999px;
  border: none;
  background: rgba(247, 244, 239, 0.35);
  cursor: pointer;
  transition: background 0.35s var(--ease), width 0.4s var(--ease);
  padding: 0;
}

.hero-dot.active {
  background: var(--ink);
  width: 4rem;
}

.hero-dot:hover {
  background: rgba(247, 244, 239, 0.7);
}

.petals {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255, 218, 211, 0.55) 0 1px, transparent 2px),
    radial-gradient(circle, rgba(255, 255, 255, 0.25) 0 1px, transparent 2px);
  background-size: 11rem 13rem, 17rem 19rem;
  opacity: 0.5;
}

.hero-copy {
  position: relative;
  z-index: 2;
  grid-column: 1;
  width: min(58rem, 100%);
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--gold);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.hero-title,
.section-heading h2,
.scene-copy h2,
.studio-copy h2,
.final-content h2 {
  margin: 0;
  font-weight: 650;
  line-height: 1.03;
  letter-spacing: 0;
}

.hero-title {
  max-width: 13em;
  font-size: clamp(2.2rem, 5.5vw, 4.8rem);
  letter-spacing: 0.01em;
  font-weight: 600;
}

.title-word {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
}

.title-word > span {
  display: inline-block;
  will-change: transform;
}

.hero-subtitle {
  max-width: 38rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  line-height: 1.85;
}

.hero-proof {
  gap: 0.65rem;
  margin-top: 1.4rem;
  flex-wrap: wrap;
}

.hero-proof span {
  min-height: 2.45rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid rgba(247, 244, 239, 0.2);
  border-radius: 999px;
  padding: 0 0.85rem;
  background: rgba(0, 0, 0, 0.26);
  color: rgba(247, 244, 239, 0.78);
  font-size: 0.78rem;
  backdrop-filter: blur(14px);
}

.hero-proof strong {
  color: var(--ink);
  font-size: 0.95rem;
}

.hero-actions {
  gap: 0.7rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  border-radius: 999px;
  padding: 0 1.2rem;
  font-size: 0.88rem;
  font-weight: 600;
  transition:
    transform 0.25s var(--ease),
    background 0.25s var(--ease);
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--ink);
  color: #111;
}

.button.ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
}

.hero-panel {
  position: absolute;
  right: clamp(1rem, 5vw, 4rem);
  bottom: 4rem;
  z-index: 2;
  width: min(17rem, calc(100% - 2rem));
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(12, 12, 13, 0.52);
  backdrop-filter: blur(20px);
}

.hero-panel span,
.hero-panel small {
  color: var(--muted);
}

.hero-panel strong {
  display: block;
  margin: 0.15rem 0;
  font-size: 2.4rem;
  line-height: 1;
}

.section {
  padding: clamp(3.2rem, 6vw, 5rem) clamp(1.2rem, 6vw, 7rem);
}

.intro-section {
  display: flex;
  flex-direction: column;
  /* align-items: center; */
  /* text-align: center; */
}

.transform-section {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
}

.section-heading h2,
.scene-copy h2,
.studio-copy h2,
.final-content h2 {
  font-size: clamp(1.6rem, 3.5vw, 3.2rem);
  font-weight: 600;
}

.section-heading.narrow {
  max-width: 54rem;
}

.section-lede,
.section-note,
.scene-copy p,
.studio-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.92rem, 1.1vw, 1rem);
  line-height: 1.8;
}

.section-note {
  margin-top: 1rem;
  max-width: 38rem;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(2rem, 4vw, 3.5rem);
  background: var(--line);
  border: 1px solid var(--line);
}

.pain-grid article {
  min-height: 13rem;
  padding: 1.1rem;
  background: rgba(15, 16, 16, 0.92);
}

.pain-grid span {
  display: block;
  margin-bottom: 2.4rem;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.pain-grid strong {
  display: block;
  margin-bottom: 0.55rem;
  font-size: clamp(1rem, 1.4vw, 1.25rem);
}

.pain-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.75;
}

.capability-pin {
  position: relative;
  min-height: 430vh;
}

.capability-stage {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  background: #090909;
}

.cap-card {
  position: absolute;
  inset: 0;
  display: grid;
  align-items: end;
  padding: clamp(3.4rem, 6vw, 10rem);
  opacity: 0;
  transform: scale(1.04);
  will-change: transform, opacity;
}

.cap-card.active {
  opacity: 1;
}

.cap-card img,
.cap-card video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: brightness(0.58) saturate(0.82);
}

.cap-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.78), transparent 58%);
}

.cap-card div {
  position: relative;
  z-index: 1;
  max-width: 47rem;
}

.cap-card span {
  color: var(--gold);
  font-weight: 800;
}

.cap-card h3 {
  margin: 0.3rem 0 0.6rem;
  font-size: clamp(1.7rem, 4vw, 3.2rem);
  line-height: 1.1;
}

.cap-card p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
  line-height: 1.7;
}

.before-after {
  position: relative;
  min-height: min(72vh, 48rem);
  border-radius: 0.5rem;
  overflow: hidden;
  background: #111;
  isolation: isolate;
}

.before-after img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.before-after .before { 
  transform: scaleX(-1);
}

.before-after .after {
  clip-path: inset(0 52% 0 0);
  will-change: clip-path; 
  
  object-position: center 10%;
}

.compare-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18%;
  width: 1px;
  background: rgba(255, 255, 255, 0.9);
  will-change: transform;
  cursor: grab;
  z-index: 10;
}

.compare-line::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.compare-line::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2'%3E%3Cpath d='M8 12L4 12M4 12L6 10M4 12L6 14'/%3E%3Cpath d='M16 12L20 12M20 12L18 10M20 12L18 14'/%3E%3C/svg%3E") center/contain no-repeat;
}

.ba-label {
  position: absolute;
  bottom: 1rem;
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  background: rgba(0, 0, 0, 0.46);
  backdrop-filter: blur(12px);
  font-size: 0.82rem;
}

.before-label {
  right: 1rem;
}

.after-label {
  left: 1rem;
}

.style-steps {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
  margin-top: 1rem;
}

.style-steps span,
.feature-grid span,
.task-row,
.price-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
}

.style-steps span {
  border-radius: 999px;
  padding: 0.6rem 0.75rem;
  color: var(--muted);
  text-align: center;
  font-size: 0.8rem;
}

.scene-section {
  min-height: 340vh;
  padding: 0 clamp(1.2rem, 6vw, 7rem);
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 6vw, 5rem);
}

.scene-copy {
  position: sticky;
  top: 0;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* .scene-stack {
  padding: 25vh 0;
} */

.scene-card {
  position: sticky;
  top: 13vh;
  height: 74vh;
  margin-bottom: 7rem;
  border-radius: 0.5rem;
  overflow: hidden;
  transform-origin: center top;
  background: #111;
}

.scene-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.05);
}

.scene-card span {
  position: absolute;
  left: 1.1rem;
  bottom: 1rem;
  font-size: clamp(1.4rem, 3.5vw, 2.8rem);
  font-weight: 500;
}

.film-section {
  position: relative;
  min-height: 100vh;
}

.film-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  min-height: 700px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.film-stage .section-heading {
  padding: 0 clamp(1.5rem, 6vw, 7rem);
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.film-track {
  display: flex;
  width: max-content;
  gap: 1.5rem;
  padding: 0 clamp(1.5rem, 6vw, 7rem);
  will-change: transform;
  align-items: stretch;
}

/* ── cases-pin (水平滚动钉住，类似 capability-pin) ──────────────── */
.cases-pin {
  position: relative;
  min-height: 100vh;
}

.cases-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  min-height: 700px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.cases-stage .section-heading {
  padding: 0 clamp(1.5rem, 6vw, 7rem);
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.cases-track {
  display: flex;
  gap: 1.5rem;
  width: max-content;
  padding: 0 clamp(1.5rem, 6vw, 7rem);
  will-change: transform;
  align-items: stretch;
}

.case-card,
.film-frame {
  flex: 0 0 clamp(22rem, 30vw, 32rem);
  height: clamp(28rem, 40vh, 38rem);
  border-radius: 0.8rem;
  overflow: hidden;
  background: #1a1a1a;
  border: 1px solid var(--line);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.case-card:hover,
.film-frame:hover {
  transform: translateY(-0.6rem) scale(1.02);
  box-shadow: 0 3rem 6rem rgba(0, 0, 0, 0.6);
}

.case-card__media {
  position: relative;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.case-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.65s var(--ease);
}

.case-card:hover .case-card__media img,
.film-frame:hover .case-card__media img {
  transform: scale(1.08);
}

.case-card__tag {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 0.75rem;
  color: var(--rose);
  border: 1px solid rgba(215, 163, 154, 0.35);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.case-card__body {
  padding: 1.25rem 1.4rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: linear-gradient(180deg, rgba(26,26,26,0.9) 0%, rgba(20,20,20,0.95) 100%);
  border-top: 1px solid var(--line);
}

.case-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.case-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.case-card__sub {
  font-size: 0.8rem;
  color: var(--muted);
}

.case-card__btn {
  flex-shrink: 0;
  padding: 0.6rem 1.2rem;
  border-radius: 0.4rem;
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  letter-spacing: 0.05em;
}

.case-card__btn:hover {
  background: var(--gold);
  color: var(--charcoal);
}

.case-card__btn:active {
  transform: scale(0.97);
}

/* case-card: 鼠标移上时的光斑扫过效果 */
.case-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 234, 208, 0.18) 50%, transparent 65%);
  transform: translateX(-100%);
  transition: transform 0.7s var(--ease);
  pointer-events: none;
  z-index: 1;
}

.case-card:hover .case-card__media::after,
.film-frame:hover .case-card__media::after {
  transform: translateX(100%);
}

.studio-section {
  min-height: min(100svh, 58rem);
  padding: clamp(3.5rem, 7vw, 6rem) clamp(1.2rem, 6vw, 7rem);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: center;
}

.studio-visual {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 28rem;
  border-radius: 0.8rem;
  overflow: hidden;
  box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.4);
  transition: transform 0.6s var(--ease), box-shadow 0.6s var(--ease);
}

.studio-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.studio-visual:hover {
  transform: translateY(-0.5rem) scale(1.02);
  box-shadow: 0 3rem 8rem rgba(0, 0, 0, 0.5);
}

.studio-visual:hover img {
  transform: scale(1.05);
}

.studio-window {
  width: min(32rem, 86%);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 2rem 7rem rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
}

.window-bar {
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.window-bar span {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--line);
}

.task-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-radius: 0.45rem;
  padding: 1rem;
  margin-top: 0.7rem;
  color: var(--muted);
}

.task-row.active {
  color: var(--ink);
  background: rgba(200, 170, 118, 0.16);
}

.task-row em {
  color: var(--gold);
  font-style: normal;
  white-space: nowrap;
}

.feature-grid {
  margin-top: 1.5rem;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.feature-grid span {
  border-radius: 999px;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--line);
  font-size: 0.82rem;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease), transform 0.3s var(--ease);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.feature-grid span::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 0.42rem;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s var(--ease);
}

.feature-grid span:hover {
  background: rgba(200, 170, 118, 0.14);
  border-color: rgba(200, 170, 118, 0.45);
  color: var(--ink);
  transform: translateY(-2px);
}

.feature-grid span:hover::before {
  transform: scaleX(1);
}

/* studio-window：滚动时 3D 微倾斜，hover 时浮起 */
.studio-window {
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
  will-change: transform;
}

.studio-window:hover {
  transform: translateY(-0.4rem) rotateX(2deg) rotateY(-2deg);
  box-shadow: 0 3rem 8rem rgba(200, 170, 118, 0.22), 0 2rem 7rem rgba(0, 0, 0, 0.32);
}

/* task-row：hover 时左侧金色高亮条滑入 */
.task-row {
  position: relative;
  transition: color 0.3s, background 0.3s, transform 0.3s var(--ease);
}

.task-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 3px;
  background: var(--gold);
  border-radius: 0 2px 2px 0;
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.35s var(--ease);
}

.task-row:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateX(4px);
  color: var(--ink);
}

.task-row:hover::before {
  transform: scaleY(1);
}

.task-row:hover em {
  color: var(--rose);
}

.task-row em {
  transition: color 0.3s;
}

.workflow-section {
  padding: clamp(3rem, 6vw, 5rem) clamp(1.2rem, 6vw, 7rem);
}

.timeline {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.6rem;
  padding: 0;
  margin: 1.6rem 0 0;
  list-style: none;
}

.timeline li {
  min-height: 7.5rem;
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
  position: relative;
  cursor: pointer;
  transition: color 0.35s var(--ease), transform 0.4s var(--ease);
}

/* 步骤下划线扫过 */
.timeline li::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.5s var(--ease);
}

/* 步骤序号小方块光晕 */
.timeline li::after {
  content: "";
  position: absolute;
  top: -0.5rem;
  left: -0.25rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.4s, transform 0.4s var(--ease);
  box-shadow: 0 0 1rem rgba(200, 170, 118, 0.6);
}

.timeline li:hover {
  transform: translateY(-4px);
}

.timeline li:hover::before {
  transform: scaleX(1);
}

.timeline li:hover::after {
  opacity: 1;
  transform: scale(1);
}

.timeline li:hover strong {
  color: var(--gold);
}

.timeline li strong {
  transition: color 0.35s var(--ease);
}

.timeline span {
  display: block;
  color: var(--gold);
  margin-bottom: 2rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  transition: letter-spacing 0.4s var(--ease), color 0.3s;
}

.timeline li:hover span {
  letter-spacing: 0.12em;
  color: var(--rose);
}

.timeline strong {
  font-size: clamp(1.1rem, 1.5vw, 1.5rem);
}

.metrics-section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: clamp(1.4rem, 3vw, 2.4rem);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  overflow: hidden;
}

.metric {
  min-height: 10rem;
  display: grid;
  place-items: center;
  text-align: center;
  background: #0f1010;
  padding: 1.5rem;
}

.metric strong {
  display: block;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1;
}

.metric span {
  color: var(--muted);
  font-size: 0.9rem;
}

.pricing-section {
  padding: clamp(3.5rem, 7vw, 6rem) clamp(1.2rem, 6vw, 7rem);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.price-card {
  min-height: 20rem;
  border-radius: 0.5rem;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

 
.price-card span {
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.price-card h3 {
  margin: auto 0 0.6rem;
  font-size: clamp(1.6rem, 3vw, 2.8rem);
}

.price-card p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.price-card a {
  margin-top: 1.4rem;
  font-weight: 800;
  transition: background 0.3s, color 0.3s;
}

/* Hover Effect */
.price-card {
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.4s ease,
              border-color 0.3s ease,
              background 0.3s ease;
  cursor: pointer;
}

.price-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(200, 170, 118, 0.4);
  border-color: rgba(200, 170, 118, 0.5);
  background: rgba(255, 255, 255, 0.1);
}

.price-card:hover span {
  color: #e8c98a;
}

.price-card:hover h3 {
  transform: translateX(4px);
  transition: transform 0.3s ease;
}

/* Selected/Active State */
.price-card.selected {
  transform: translateY(-8px) scale(1.03);
  box-shadow:
    0 16px 32px rgba(0, 0, 0, 0.35),
    0 0 0 2px var(--gold);
  border-color: var(--gold);
  background: linear-gradient(135deg, rgba(200, 170, 118, 0.18), rgba(255, 255, 255, 0.1));
}

.price-card.selected::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  border-radius: 0 0 4px 4px;
}

.price-card.selected span {
  color: var(--gold);
  transition: color 0.3s;
}

.final-cta {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  text-align: center;
}

.final-content {
  position: relative;
  z-index: 2;
  padding: 0 1.2rem;
  color: #fff;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.5),
               0 0 40px rgba(255, 255, 255, 0.3),
               0 2px 4px rgba(0, 0, 0, 0.5);
}

.final-content .eyebrow,
.final-content h2 {
  color: #fff;
}

.final-content h2 {
  text-shadow: 0 0 30px rgba(255, 255, 255, 0.6),
               0 0 60px rgba(255, 255, 255, 0.4),
               0 2px 8px rgba(0, 0, 0, 0.5);
}

.final-content h2 {
  max-width: 10em;
  margin-bottom: 2rem;
}

[data-animate],
.case-card,
.film-frame,
.price-card,
.timeline li,
.metric,
.studio-window {
  will-change: transform, opacity;
}

@media (min-width: 901px) {
  :root {
    --desktop-section-x: clamp(2.4rem, 12vw, 14rem);
    --desktop-section-y: clamp(4rem, 6vw, 5.5rem);
    --desktop-large-section-y: clamp(4.5rem, 7vw, 6.5rem);
  }

  body {
    font-size: 0.94rem;
  }

  .site-header {
    padding: 0.9rem clamp(2rem, 6vw, 6rem);
  }

  .brand-en {
    font-size: 0.66rem;
  }

  .brand-cn {
    font-size: 0.92rem;
  }

  .desktop-nav {
    gap: 1.35rem;
    font-size: 0.76rem;
  }

  .header-cta {
    padding: 0.48rem 0.9rem;
    font-size: 0.74rem;
  }

  .eyebrow {
    margin-bottom: 0.65rem;
    font-size: 0.64rem;
  }

  .hero-title {
    font-size: clamp(2rem, 4.8vw, 4.15rem);
  }

  .hero-subtitle {
    max-width: 34rem;
    font-size: clamp(0.82rem, 0.95vw, 0.96rem);
    line-height: 1.78;
  }

  .hero-proof span {
    min-height: 2.2rem;
    padding: 0 0.75rem;
    font-size: 0.72rem;
  }

  .hero-proof strong {
    font-size: 0.86rem;
  }

  .button {
    min-height: 2.45rem;
    padding: 0 1.05rem;
    font-size: 0.8rem;
  }

  .section {
    padding: var(--desktop-section-y) var(--desktop-section-x);
  }

  .studio-section,
  .workflow-section,
  .pricing-section {
    padding: var(--desktop-large-section-y) var(--desktop-section-x);
  }

  .workflow-section {
    padding-top: clamp(3.8rem, 5vw, 5rem);
    padding-bottom: clamp(3.8rem, 5vw, 5rem);
  }

  .scene-section {
    padding-right: var(--desktop-section-x);
    padding-left: var(--desktop-section-x);
  }

  .film-stage .section-heading,
  .film-track,
  .cases-stage .section-heading,
  .cases-track {
    padding-right: var(--desktop-section-x);
    padding-left: var(--desktop-section-x);
  }

  .section-heading h2,
  .scene-copy h2,
  .studio-copy h2,
  .final-content h2 {
    font-size: clamp(1.35rem, 2.6vw, 2.55rem);
    line-height: 1.12;
  }

  .section-heading.narrow {
    max-width: 46rem;
  }

  .section-lede,
  .section-note,
  .scene-copy p,
  .studio-copy p {
    font-size: clamp(0.8rem, 0.88vw, 0.92rem);
    line-height: 1.72;
  }

  .section-note {
    max-width: 34rem;
    margin-top: 0.85rem;
  }

  .pain-grid {
    margin-top: clamp(2.5rem, 5vw, 4.5rem);
  }

  .pain-grid article {
    min-height: 11rem;
    padding: 1.6rem;
  }

  .pain-grid span {
    margin-bottom: 2rem;
    font-size: 0.66rem;
  }

  .pain-grid strong {
    font-size: clamp(0.9rem, 1vw, 1.08rem);
  }

  .pain-grid p {
    font-size: 0.78rem;
    line-height: 1.68;
  }

  .cap-card h3 {
    font-size: clamp(1.45rem, 3.1vw, 2.65rem);
  }

  .cap-card p {
    font-size: clamp(0.82rem, 0.95vw, 0.94rem);
  }

  .ba-label {
    padding: 0.48rem 0.75rem;
    font-size: 0.74rem;
  }

  .style-steps span {
    padding: 0.54rem 0.68rem;
    font-size: 0.73rem;
  }

  .scene-card span {
    font-size: clamp(1.15rem, 2.6vw, 2.25rem);
  }

  .film-frame,
  .case-card {
    flex-basis: clamp(20rem, 26vw, 28rem);
    height: clamp(25rem, 36vh, 34rem);
  }

  .case-card__tag {
    font-size: 0.68rem;
  }

  .case-card__body {
    padding: 1.65rem 1.9rem 1.8rem;
  }

  .case-card__title {
    font-size: 0.88rem;
  }

  .case-card__sub {
    font-size: 0.72rem;
  }

  .case-card__btn {
    padding: 0.52rem 1rem;
    font-size: 0.74rem;
  }

  .studio-visual {
    min-height: 24rem;
  }

  .feature-grid span {
    padding: 0.5rem 0.72rem;
    font-size: 0.74rem;
  }

  .timeline {
    gap: 0.8rem;
    margin-top: 2.5rem;
  }

  .timeline li {
    min-height: 6.4rem;
    padding-top: 0.85rem;
  }

  .timeline span {
    margin-bottom: 1.1rem;
    font-size: 0.66rem;
  }

  .timeline strong {
    font-size: clamp(0.9rem, 1.05vw, 1.12rem);
  }

  .metric {
    min-height: 9rem;
    padding: 1.8rem;
  }

  .metric strong {
    font-size: clamp(1.9rem, 4.2vw, 3.25rem);
  }

  .metric span {
    font-size: 0.78rem;
  }

  .price-grid {
    gap: 1.2rem;
    margin-top: 3.5rem;
  }

  .price-card {
    min-height: 15rem;
    padding: 1.8rem;
  }

  .price-card span {
    font-size: 0.7rem;
  }

  .price-card h3 {
    font-size: clamp(1.25rem, 2vw, 2.05rem);
  }

  .price-card p {
    font-size: 0.78rem;
    line-height: 1.62;
  }

  .price-card a {
    font-size: 0.84rem;
  }

  .final-content h2 {
    max-width: 11em;
  }
}

@media (max-width: 900px) {
  .desktop-nav {
    display: none;
  }

  .hero {
    padding-bottom: 2rem;
  }

  .section,
  .studio-section,
  .workflow-section,
  .pricing-section {
    padding-top: clamp(3rem, 8vw, 4.5rem);
    padding-bottom: clamp(3rem, 8vw, 4.5rem);
  }

  .hero-panel {
    position: relative;
    right: auto;
    bottom: auto;
    margin-top: 2rem;
  }

  .intro-section,
  .transform-section,
  .scene-section,
  .studio-section,
  .workflow-section {
    grid-template-columns: 1fr;
  }

  .style-steps {
    grid-column: auto;
    grid-template-columns: 1fr 1fr;
  }

  .scene-copy {
    position: relative;
    height: auto;
    padding-top: 3.5rem;
  }

  .scene-section {
    min-height: auto;
  }

  .scene-stack {
    padding: 1.5rem 0 3.5rem;
  }

  .scene-card {
    position: relative;
    top: auto;
    height: min(28rem, 72svh);
    margin-bottom: 1rem;
  }

  .pin-spacer > .film-section,
  .pin-spacer > .cases-pin {
    min-height: 100svh !important;
    display: flex !important;
    flex-direction: column;
    justify-content: center;
  }

  .pin-spacer > .film-section .film-stage,
  .pin-spacer > .cases-pin .cases-stage {
    min-height: 100svh;
  }

  .masonry,
  .price-grid,
  .metrics-section,
  .timeline,
  .pain-grid {
    grid-template-columns: 1fr;
  }

  .timeline li,
  .metric {
    min-height: auto;
  }

  .timeline li {
    padding-bottom: 1rem;
  }

  .metric {
    padding: 1.4rem;
  }

  .case-card,
  .film-frame {
    flex: 0 0 85vw;
  }
}

@media (max-width: 560px) {
  .header-cta {
    display: none;
  }

  .hero-title {
    font-size: clamp(2.4rem, 12vw, 3.5rem);
  }

  .button {
    width: 100%;
  }

  .hero-proof span {
    width: 100%;
    justify-content: space-between;
  }

  .task-row {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }

  .cursor-light {
    display: none;
  }

  .flight-path {
    display: none;
  }
}