:root {
  --bg: #04020a;
  --bg-soft: #0b0715;
  --surface: rgba(10, 7, 19, 0.86);
  --surface-strong: rgba(7, 5, 12, 0.96);
  --text: #f5f3ff;
  --muted: rgba(245, 243, 255, 0.72);
  --line: rgba(163, 115, 255, 0.18);
  --line-strong: rgba(163, 115, 255, 0.56);
  --accent: #8f47ff;
  --accent-soft: rgba(143, 71, 255, 0.18);
  --content: min(1440px, calc(100vw - 36px));
  --radius: 28px;
  --thumb-radius: 16px;
  --header-height: 78px;
  --brand-lockup-width: 10.8rem;
  --viewer-height: clamp(460px, 74vh, 920px);
  --section-space: clamp(48px, 7vh, 82px);
  --hero-stage-gap: clamp(96px, 12vh, 168px);
  --hero-enter-duration: 1310ms;
  --step-duration: 1310ms;
  --step-ease: cubic-bezier(0.18, 0.86, 0.3, 1);
  --step-ease-soft: cubic-bezier(0.2, 0.78, 0.3, 1);
  --step-snap-ease: cubic-bezier(0.2, 0.82, 0.3, 1);
  --step-perspective: 2000px;
  --step-snap-duration: 1990ms;
  --hero-play-button-offset: clamp(6px, 1vw, 14px);
  --shadow: 0 24px 72px rgba(0, 0, 0, 0.42);
}

html {
  scroll-behavior: auto;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 18% 14%, rgba(126, 55, 255, 0.18), transparent 0 24%),
    radial-gradient(circle at 82% 18%, rgba(115, 86, 255, 0.18), transparent 0 22%),
    radial-gradient(circle at 12% 86%, rgba(0, 164, 255, 0.08), transparent 0 16%),
    linear-gradient(180deg, #030107 0%, #09040f 42%, #030107 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 10% 22%, rgba(255, 255, 255, 0.9) 0 1px, transparent 1.8px),
    radial-gradient(circle at 28% 70%, rgba(255, 255, 255, 0.7) 0 1px, transparent 1.8px),
    radial-gradient(circle at 52% 34%, rgba(255, 255, 255, 0.55) 0 1px, transparent 2px),
    radial-gradient(circle at 78% 16%, rgba(255, 255, 255, 0.8) 0 1px, transparent 2px),
    radial-gradient(circle at 92% 68%, rgba(255, 255, 255, 0.7) 0 1.2px, transparent 2px),
    radial-gradient(circle at 62% 84%, rgba(255, 255, 255, 0.65) 0 1px, transparent 2px);
  opacity: 0.82;
  z-index: -2;
}

body.is-modal-open {
  overflow: hidden;
}

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

button,
video {
  font: inherit;
}

img,
video {
  display: block;
  width: 100%;
  height: auto;
}

.site-shell {
  position: relative;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: var(--content);
  min-height: var(--header-height);
  margin: 0 auto;
  padding: 0;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 -14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(7, 5, 13, 0.62);
  backdrop-filter: blur(18px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.24);
  z-index: -1;
}

.brand-mark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-self: center;
  gap: 4px;
  min-width: var(--brand-lockup-width);
  min-height: calc(var(--header-height) - 16px);
  padding-left: 8px;
}

.brand-mark__cn,
.brand-mark__en,
.site-nav a,
.site-footer {
  letter-spacing: 0.18em;
}

.brand-mark__cn,
.promo-modal__panel h2 {
  font-family: "Bodoni MT", Didot, "Times New Roman", "STSong", "SimSun", serif;
  font-weight: 400;
}

.brand-mark__cn {
  display: block;
  width: auto;
  font-size: 1.08rem;
  text-align: center;
  letter-spacing: 0.18em;
}

.brand-mark__cn > span,
.brand-mark__en > span {
  display: inline-block;
}

.brand-mark__en {
  display: block;
  width: auto;
  font-size: 0.58rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.24em;
}

.brand-mark__cn > span + span,
.brand-mark__en > span + span {
  margin-left: 0.32em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  gap: 4px;
  width: auto;
  min-width: 58px;
  height: 46px;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(10, 7, 18, 0.88);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle__label {
  display: none;
  font-size: 0.5rem;
  line-height: 1;
  letter-spacing: 0.18em;
}

.nav-toggle__icon {
  display: none;
}

.nav-toggle__icon span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  align-content: center;
  gap: 10px 14px;
  min-height: calc(var(--header-height) - 16px);
}

.site-nav__title {
  display: none;
}

.site-nav__brand {
  display: none;
}

.site-nav a {
  position: relative;
  padding: 8px 0;
  color: rgba(245, 243, 255, 0.74);
  font-size: 0.76rem;
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0.6);
  opacity: 0;
  transition: opacity 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.page-main {
  width: 100%;
}

.hero,
.section {
  width: var(--content);
  margin: 0 auto;
}

.hero {
  padding: 20px 0 var(--section-space);
}

.hero__stage + .strip--hero {
  position: relative;
  margin-top: var(--hero-stage-gap);
}

.hero__stage + .strip--hero::before {
  content: "";
  position: absolute;
  top: calc(var(--hero-stage-gap) * -0.5);
  left: 0;
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}

.section {
  padding: var(--section-space) 0;
}

.hero + .section,
.section + .section {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.hero__stage,
.strip__slide,
.promo-modal__panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top right, rgba(143, 71, 255, 0.16), transparent 0 24%),
    linear-gradient(180deg, rgba(14, 10, 25, 0.96), rgba(6, 4, 11, 0.98));
  box-shadow: var(--shadow);
}

.hero__stage::before,
.strip__slide::before,
.promo-modal__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.04)),
    radial-gradient(circle at 90% 10%, rgba(143, 71, 255, 0.16), transparent 0 24%);
  pointer-events: none;
}

.poster-frame {
  background:
    radial-gradient(circle at top right, rgba(143, 71, 255, 0.16), transparent 0 24%),
    linear-gradient(180deg, rgba(14, 10, 25, 0.96), rgba(6, 4, 11, 0.98));
}

.poster-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.hero__stage {
  min-height: min(86vh, 920px);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: clamp(20px, 4vw, 42px);
  pointer-events: none;
}

.hero__promo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: clamp(6px, 1.4vh, 18px);
  pointer-events: auto;
}

@media (min-width: 821px) {
  .hero__overlay {
    align-items: center;
  }

  .hero__promo {
    margin-bottom: 0;
    transform: translate3d(0, clamp(44px, 6vh, 76px), 0);
  }

  .media-play-button--hero {
    --play-button-transform: translate3d(0, 0, 0);
  }
}

.media-play-button {
  --play-button-transform: translate3d(0, 0, 0);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid rgba(245, 243, 255, 0.52);
  background: transparent;
  color: var(--text);
  box-shadow: none;
  cursor: pointer;
  pointer-events: auto;
  transform: var(--play-button-transform);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.media-play-button:hover {
  transform: var(--play-button-transform) scale(1.04);
  border-color: rgba(255, 255, 255, 0.86);
  background: rgba(255, 255, 255, 0.04);
}

.media-play-button__icon {
  width: 0;
  height: 0;
  margin-left: 4px;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  border-left: 20px solid currentColor;
  opacity: 0.92;
}

.media-play-button--hero {
  --play-button-transform: translate3d(0, var(--hero-play-button-offset), 0);
  width: clamp(88px, 8vw, 108px);
  height: clamp(88px, 8vw, 108px);
  border-radius: 50%;
}

.media-play-button--hero::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(245, 243, 255, 0.28);
  border-radius: 50%;
}

.media-play-button--hero[hidden] {
  display: none;
}

.hero__status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(9, 7, 16, 0.72);
  color: var(--muted);
  text-align: center;
}

.hero__status[hidden] {
  display: none;
}

.strip {
  position: relative;
  display: grid;
  gap: 18px;
}

.strip__viewer {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.strip__viewer::-webkit-scrollbar {
  display: none;
}

.strip[data-strip-mode="step"] .strip__viewer {
  gap: 0;
  position: relative;
  overscroll-behavior-y: contain;
  overscroll-behavior-x: contain;
  scroll-behavior: auto;
  will-change: scroll-position;
}

.strip__slide {
  min-height: var(--viewer-height);
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.strip[data-strip-mode="step"] .strip__slide {
  transition:
    transform var(--step-duration) var(--step-ease),
    opacity 220ms var(--step-ease-soft);
  backface-visibility: hidden;
  clip-path: inset(0 round var(--radius));
  contain: paint;
  isolation: isolate;
  transform-origin: center center;
  transform: translateZ(0);
  will-change: transform, opacity;
}

.strip[data-strip-mode="step"] .strip__slide.is-active {
  z-index: 1;
}

.strip[data-strip-mode="step"] .strip__slide.is-transition-out-left {
  animation: strip-slide-out-left var(--step-duration) var(--step-ease) both;
}

.strip[data-strip-mode="step"] .strip__slide.is-transition-out-right {
  animation: strip-slide-out-right var(--step-duration) var(--step-ease) both;
}

.strip[data-strip-mode="step"] .strip__slide.is-transition-in-right {
  animation: strip-slide-in-right var(--step-duration) var(--step-ease) both;
}

.strip[data-strip-mode="step"] .strip__slide.is-transition-in-left {
  animation: strip-slide-in-left var(--step-duration) var(--step-ease) both;
}

.strip.is-snap-settling .strip__viewer {
  animation: strip-viewer-snap-settle var(--step-snap-duration) var(--step-snap-ease) both;
}

.strip.is-paging .strip__viewer {
  visibility: hidden;
}

.hero__stage.is-step-enter-source,
.strip--hero.is-step-entering .strip__viewer {
  visibility: hidden;
}

.hero__enter-transition-layer {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
}

.hero__enter-transition-card {
  position: fixed;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top right, rgba(143, 71, 255, 0.16), transparent 0 24%),
    linear-gradient(180deg, rgba(14, 10, 25, 0.96), rgba(6, 4, 11, 0.98));
  box-shadow: var(--shadow);
  clip-path: inset(0 round var(--radius));
  contain: paint;
}

.hero__enter-transition-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.04)),
    radial-gradient(circle at 90% 10%, rgba(143, 71, 255, 0.16), transparent 0 24%);
  pointer-events: none;
}

.hero__enter-transition-card > img,
.hero__enter-transition-card > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__enter-transition-card--out {
  z-index: 1;
  animation: hero-enter-out-down var(--hero-enter-duration) var(--step-ease) both;
}

.hero__enter-transition-card--in {
  z-index: 2;
  animation: hero-enter-in-up var(--hero-enter-duration) var(--step-ease) both;
}

.strip__transition-layer {
  position: absolute;
  z-index: 4;
  pointer-events: none;
  overflow: hidden;
  border-radius: var(--radius);
  clip-path: inset(0 round var(--radius));
  contain: paint;
}

.strip__transition-card {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-height: 100%;
  margin: 0;
  transform-origin: center center;
  will-change: transform, opacity, filter;
}

.strip__transition-card--incoming {
  z-index: 2;
}

.strip__transition-card.is-transition-out-left,
.strip__transition-card.is-transition-in-right {
  transform-origin: left center;
}

.strip__transition-card.is-transition-out-right,
.strip__transition-card.is-transition-in-left {
  transform-origin: right center;
}

@keyframes strip-viewer-snap-settle {
  0% {
    transform: translate3d(0, 56px, 0) scale(0.972);
    filter: saturate(0.95);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(1);
    filter: saturate(1);
  }
}

@keyframes hero-enter-out-down {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
    filter: saturate(1);
  }

  100% {
    transform: translate3d(0, 64px, 0) scale(0.86);
    opacity: 0.14;
    filter: saturate(0.94);
  }
}

@keyframes hero-enter-in-up {
  0% {
    transform: translate3d(0, 64px, 0) scale(0.95);
    opacity: 0.24;
    filter: saturate(0.96);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
    filter: saturate(1);
  }
}

@keyframes strip-slide-out-left {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
    filter: saturate(1);
  }

  100% {
    transform: translate3d(-72px, 0, 0) scale(0.94);
    opacity: 0.16;
    filter: saturate(0.95);
  }
}

@keyframes strip-slide-out-right {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
    filter: saturate(1);
  }

  100% {
    transform: translate3d(72px, 0, 0) scale(0.94);
    opacity: 0.16;
    filter: saturate(0.95);
  }
}

@keyframes strip-slide-in-right {
  0% {
    transform: translate3d(72px, 0, 0) scale(0.97);
    opacity: 0.26;
    filter: saturate(0.97);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
    filter: saturate(1);
  }
}

@keyframes strip-slide-in-left {
  0% {
    transform: translate3d(-72px, 0, 0) scale(0.97);
    opacity: 0.26;
    filter: saturate(0.97);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 1;
    filter: saturate(1);
  }
}

.strip__slide--video {
  display: grid;
  place-items: center;
  padding: clamp(12px, 2vw, 24px);
  isolation: isolate;
}

[data-case-video-surface] {
  cursor: pointer;
}

.case-video {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
  border-radius: calc(var(--radius) - 8px);
}

.case-video__timer {
  position: absolute;
  right: clamp(20px, 3vw, 40px);
  bottom: clamp(20px, 3vw, 36px);
  z-index: 2;
  min-width: 92px;
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(6, 4, 12, 0.72);
  color: rgba(245, 243, 255, 0.92);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  font-variant-numeric: tabular-nums;
  text-align: center;
  backdrop-filter: blur(16px);
  pointer-events: none;
}

.case-video__timer[hidden] {
  display: none;
}

.strip__thumbs {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(132px, 178px);
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.strip__thumbs::-webkit-scrollbar {
  display: none;
}

.strip__thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--thumb-radius);
  background: rgba(12, 9, 21, 0.86);
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.strip__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.strip__thumb:hover,
.strip__thumb.is-active {
  transform: translateY(-2px);
  border-color: rgba(143, 71, 255, 0.52);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.32);
}

.site-footer {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px 28px;
  width: var(--content);
  margin: 0 auto;
  padding: 26px 0 42px;
  color: rgba(245, 243, 255, 0.62);
  font-size: 0.78rem;
}

.site-footer p {
  margin: 0;
}

.site-footer__brand {
  text-align: left;
}

.site-footer__services {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 6px 18px;
  justify-self: center;
  color: rgba(245, 243, 255, 0.56);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-align: center;
}

.site-footer__services span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.site-footer a {
  justify-self: end;
  align-self: end;
}

.promo-modal[hidden] {
  display: none;
}

.promo-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 24px;
}

.promo-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 2, 8, 0.82);
  backdrop-filter: blur(18px);
}

.promo-modal__panel {
  position: relative;
  width: min(1120px, calc(100vw - 32px));
  padding: 22px;
  z-index: 1;
}

.promo-modal__panel h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.promo-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  background: rgba(12, 9, 21, 0.92);
  color: var(--text);
  cursor: pointer;
}

.promo-player {
  width: 100%;
  margin-top: 18px;
  border-radius: 20px;
  background: #000;
}

.has-js .reveal {
  opacity: 0;
  transform: translate3d(0, 30px, 0);
  transition: opacity 620ms ease, transform 820ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.has-js .reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.has-js .poster-frame img {
  opacity: 0;
  transition: opacity 420ms ease;
}

.has-js .poster-frame.is-loaded img {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  html,
  .strip__viewer {
    scroll-behavior: auto;
  }

  .has-js .reveal {
    transition: opacity 200ms ease, transform 260ms ease;
  }

  .has-js .poster-frame img {
    transition: opacity 200ms ease;
  }
}

@media (max-width: 1180px), (max-height: 760px) {
  :root {
    --content: min(100vw - 24px, 100%);
    --radius: 22px;
    --header-height: 70px;
    --viewer-height: clamp(320px, 58vh, 720px);
    --hero-stage-gap: clamp(72px, 10vh, 128px);
  }

  .site-header::before {
    inset: 0 -8px;
    border-radius: 28px;
  }

  .nav-toggle {
    display: inline-flex;
    min-width: 64px;
    padding: 6px 12px;
  }

  .nav-toggle__label {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    left: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 16px;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    background: rgba(8, 6, 15, 0.96);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }

  .site-nav__title,
  .site-nav__brand {
    display: none;
  }

  .site-header.is-open .site-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .hero__stage {
    min-height: min(72vh, 780px);
  }

  .hero__promo {
    margin-bottom: clamp(4px, 1vh, 12px);
  }
}

@media (max-height: 760px) {
  .site-header {
    padding: 0;
  }

  .hero {
    padding-top: 12px;
  }

  .hero__stage {
    min-height: min(64vh, 640px);
  }

  .hero__overlay {
    padding: 18px;
  }

  .media-play-button--hero {
    width: clamp(72px, 8vw, 92px);
    height: clamp(72px, 8vw, 92px);
  }
}

@media (max-width: 640px) {
  .hero,
  .section {
    padding-left: 0;
    padding-right: 0;
  }

  .site-header {
    gap: 12px;
  }

  .brand-mark {
    min-width: 0;
  }

  .brand-mark__en {
    letter-spacing: 0.28em;
  }

  .hero__overlay {
    padding: 16px;
  }

  .hero__promo {
    gap: 12px;
    margin-bottom: 28px;
  }

  .media-play-button--hero {
    width: 78px;
    height: 78px;
  }

  .strip__thumbs {
    grid-auto-columns: minmax(112px, 132px);
  }

  .promo-modal {
    padding: 12px;
  }

  .promo-modal__panel {
    padding: 18px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    justify-items: stretch;
    gap: 10px;
  }

  .site-footer__brand,
  .site-footer__services {
    justify-self: center;
    text-align: center;
  }

  .site-footer a {
    justify-self: end;
    text-align: right;
  }
}

@media (max-width: 820px) and (orientation: portrait) {
  :root {
    --content: min(100vw - 12px, 100%);
    --header-height: 60px;
    --mobile-header-side-reserve: 70px;
    --brand-lockup-width: clamp(150px, 40vw, 186px);
    --viewer-height: clamp(214px, calc((100vw - 12px) * 0.5625), 248px);
    --hero-enter-duration: 1000ms;
    --step-duration: 1000ms;
    --step-snap-duration: 1000ms;
    --hero-play-button-offset: 44px;
    --section-space: clamp(22px, 4vh, 34px);
    --hero-stage-gap: clamp(28px, 5vh, 52px);
  }

  .site-header {
    justify-content: flex-end;
    gap: 8px;
    min-height: calc(var(--header-height) + env(safe-area-inset-top));
    padding: env(safe-area-inset-top) 0 0;
  }

  .site-header::before {
    top: env(safe-area-inset-top);
    right: -4px;
    bottom: 0;
    left: -4px;
    border-radius: 20px;
  }

  .brand-mark {
    position: absolute;
    top: env(safe-area-inset-top);
    right: var(--mobile-header-side-reserve);
    bottom: 0;
    left: var(--mobile-header-side-reserve);
    display: flex;
    flex: none;
    width: auto;
    max-width: none;
    min-height: 0;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 0;
    text-align: center;
    transform: none;
    z-index: 1;
    overflow: hidden;
  }

  .brand-mark__cn {
    display: block;
    font-size: 0.86rem;
    line-height: 1.05;
    width: auto;
    text-align: center;
    letter-spacing: 0.16em;
    overflow: hidden;
  }

  .brand-mark__en {
    display: block;
    font-size: 0.46rem;
    letter-spacing: 0.18em;
    line-height: 1;
    width: auto;
    text-align: center;
    overflow: hidden;
  }

  .brand-mark__cn > span + span,
  .brand-mark__en > span + span {
    margin-left: 0;
  }

  .nav-toggle {
    position: relative;
    z-index: 2;
    min-width: 48px;
    height: 38px;
    padding: 4px 8px;
    gap: 0;
    margin-left: 0;
  }

  .nav-toggle__label {
    font-size: 0.46rem;
    letter-spacing: 0.16em;
  }

  .site-nav {
    left: 50%;
    right: auto;
    width: min(calc(100vw - 12px), 100%);
    max-height: calc(100svh - var(--header-height) - env(safe-area-inset-top) - 18px);
    grid-template-columns: 1fr;
    justify-items: center;
    align-content: start;
    gap: 6px;
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
    border-radius: 18px;
    overflow-y: auto;
    text-align: center;
    transform: translate(-50%, -8px);
  }

  .site-header.is-open .site-nav {
    transform: translate(-50%, 0);
  }

  .site-nav__title,
  .site-nav a {
    width: 100%;
    justify-self: center;
    text-align: center;
  }

  .site-nav a {
    padding: 5px 0;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    line-height: 1.3;
  }

  .hero,
  .section,
  .hero__stage,
  .strip,
  .strip__viewer,
  .strip__slide {
    width: 100%;
  }

  .hero {
    padding-top: 8px;
  }

  .hero__stage {
    height: var(--viewer-height);
    min-height: var(--viewer-height);
  }

  .hero__overlay {
    align-items: center;
    padding: 14px;
  }

  .hero__promo {
    margin-bottom: 0;
  }

  .strip {
    gap: 10px;
  }

  .strip__slide {
    height: var(--viewer-height);
    min-height: var(--viewer-height);
  }

  .strip__thumbs {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --content: min(100vw - 12px, 100%);
    --radius: 18px;
    --thumb-radius: 12px;
    --header-height: 56px;
    --mobile-header-side-reserve: 64px;
    --brand-lockup-width: clamp(144px, 42vw, 174px);
    --viewer-height: clamp(214px, calc((100vw - 12px) * 0.5625), 244px);
    --section-space: clamp(28px, 5vh, 42px);
    --hero-stage-gap: clamp(44px, 7vh, 72px);
  }

  html {
    scroll-padding-top: calc(var(--header-height) + 14px);
  }

  .site-header {
    justify-content: flex-end;
    gap: 8px;
    min-height: calc(var(--header-height) + env(safe-area-inset-top));
    padding: env(safe-area-inset-top) 0 0;
  }

  .site-header::before {
    top: env(safe-area-inset-top);
    right: -4px;
    bottom: 0;
    left: -4px;
    border-radius: 22px;
  }

  .brand-mark {
    position: absolute;
    top: env(safe-area-inset-top);
    right: var(--mobile-header-side-reserve);
    bottom: 0;
    left: var(--mobile-header-side-reserve);
    display: flex;
    flex: none;
    width: auto;
    max-width: none;
    min-height: 0;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 0;
    text-align: center;
    transform: none;
    z-index: 1;
    overflow: hidden;
  }

  .brand-mark__cn {
    display: block;
    font-size: 0.82rem;
    width: auto;
    text-align: center;
    letter-spacing: 0.16em;
  }

  .brand-mark__en {
    display: block;
    font-size: 0.44rem;
    letter-spacing: 0.18em;
    width: auto;
    text-align: center;
  }

  .brand-mark__cn > span + span,
  .brand-mark__en > span + span {
    margin-left: 0;
  }

  .nav-toggle {
    position: relative;
    z-index: 2;
    min-width: 46px;
    height: 36px;
    padding: 4px 8px;
    margin-left: 0;
  }

  .site-nav {
    max-height: calc(100svh - var(--header-height) - env(safe-area-inset-top) - 14px);
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  }

  .site-nav a {
    font-size: 0.66rem;
    padding: 5px 0;
  }

  .hero {
    padding-top: 8px;
  }

  .hero__stage {
    height: var(--viewer-height);
    min-height: var(--viewer-height);
  }

  .hero__stage > img {
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  .hero__overlay {
    align-items: center;
    padding: 14px;
  }

  .hero__promo {
    gap: 10px;
    margin-bottom: 0;
  }

  .media-play-button--hero {
    width: 64px;
    height: 64px;
  }

  .media-play-button--hero::before {
    inset: 7px;
  }

  .media-play-button__icon {
    margin-left: 3px;
    border-top-width: 9px;
    border-bottom-width: 9px;
    border-left-width: 15px;
  }

  .hero__status {
    min-height: 38px;
    padding: 8px 14px;
    font-size: 0.74rem;
  }

  .strip {
    gap: 12px;
  }

  .strip__viewer {
    gap: 10px;
  }

  .strip__slide {
    height: var(--viewer-height);
    min-height: var(--viewer-height);
  }

  .strip__thumbs {
    grid-auto-columns: minmax(84px, 104px);
    gap: 8px;
  }

  .case-video__timer {
    right: 12px;
    bottom: 12px;
    min-width: 74px;
    padding: 8px 12px;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
  }

  .promo-modal {
    padding: 8px;
  }

  .promo-modal__panel {
    width: min(100vw - 12px, 100%);
    padding: 14px;
  }

  .site-footer {
    padding-bottom: calc(28px + env(safe-area-inset-bottom));
  }

  .site-footer__services {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, max-content));
    justify-content: center;
    justify-self: center;
    gap: 8px 14px;
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 430px) {
  :root {
    --content: min(100vw - 10px, 100%);
    --mobile-header-side-reserve: 60px;
    --brand-lockup-width: clamp(138px, 43vw, 168px);
    --viewer-height: clamp(210px, calc((100vw - 10px) * 0.5625), 238px);
    --hero-play-button-offset: 38px;
    --section-space: clamp(24px, 4.6vh, 36px);
    --hero-stage-gap: clamp(32px, 5.4vh, 54px);
  }

  .hero__stage {
    height: var(--viewer-height);
    min-height: var(--viewer-height);
  }

  .hero__stage > img {
    object-position: center 14%;
  }

  .strip__thumbs {
    display: none;
  }

  .strip {
    gap: 8px;
  }
}

@media (max-width: 402px) {
  :root {
    --viewer-height: clamp(204px, calc((100vw - 10px) * 0.5625), 230px);
  }

  .site-header {
    gap: 8px;
  }

  .brand-mark__cn {
    font-size: 0.88rem;
  }

  .brand-mark__en {
    font-size: 0.54rem;
    letter-spacing: 0.24em;
  }
}

@media (max-width: 393px) {
  :root {
    --mobile-header-side-reserve: 56px;
    --brand-lockup-width: clamp(132px, 44vw, 160px);
    --viewer-height: clamp(198px, calc((100vw - 10px) * 0.5625), 222px);
    --hero-play-button-offset: 34px;
    --section-space: clamp(22px, 4vh, 32px);
  }

  .hero__stage {
    height: var(--viewer-height);
    min-height: var(--viewer-height);
  }

  .media-play-button--hero {
    width: 58px;
    height: 58px;
  }
}