/* ===== 第一屏：与旧版 index.css 保持一致 ===== */

html {
  height: 100%;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  overflow-y: scroll;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #ffffff;
  height: 100%;
}

.page {
  margin: 0;
  padding: 0;
}

#fullpage {
  height: auto;
}

.section {
  position: relative;
  height: 100vh;
  height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  overflow: hidden;
}

.hero-screen {
  position: relative;
  background-color: #ffffff;
}

.drawer {
  position: fixed;
  top: 0;
  left: -250px;
  width: 250px;
  height: 100%;
  background-color: #ffffff;
  color: #fff;
  overflow: hidden;
  transition: left 0.3s;
  z-index: 1000;
}

.drawer.open {
  left: 0;
}

.overlay.visible {
  opacity: 70%;
  visibility: visible;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(85%, 85%, 85%, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s;
  z-index: 999;
}

.quote-container {
  text-align: right;
  position: absolute;
  bottom: 0;
  right: 30px;
  z-index: 998;
  transform: translateY(0);
  transition: transform 1.15s cubic-bezier(0.22, 1, 0.36, 1);
}

.quote-container.is-lifted {
  transform: translateY(-72px);
}

.menuText-container {
  text-align: left;
  position: fixed;
  top: 5px;
  left: 5px;
  padding: 10px;
  opacity: 40%;
  cursor: pointer;
  z-index: 1001;
  color: #000;
  transition: color 0.35s ease;
}

.menuText-container.is-light {
  color: #fff;
}

/* ===== Index：右侧常驻作品目录 ===== */

.side-index {
  position: fixed;
  top: 50%;
  right: 14px;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  transform: translate(12px, -50%);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.55s ease,
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    color 0.45s ease;
  color: #111;
}

.side-index.is-shown {
  opacity: 1;
  pointer-events: auto;
  transform: translate(0, -50%);
}

.side-index.is-light {
  color: #f4f6f8;
}

.side-index-list {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  padding-right: 14px;
}

.side-index-list::before {
  content: '';
  position: absolute;
  right: 0;
  top: 0.35em;
  bottom: 0.35em;
  width: 1px;
  background: currentColor;
  opacity: 0.14;
}

.side-index-needle {
  position: absolute;
  right: -1.5px;
  top: 0;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0;
  transition:
    top 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.35s ease,
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  transform: scale(0.6);
  pointer-events: none;
  z-index: 1;
}

.side-index.is-shown .side-index-needle.is-ready {
  opacity: 0.75;
  transform: scale(1);
}

.side-index-item {
  position: relative;
  display: block;
  padding: 1px 0;
  margin-right: 0;
  text-decoration: none;
  color: inherit;
  font-family: 'Noto Serif SC', serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.3;
  text-align: right;
  opacity: 0.28;
  transform: translateX(8px);
  transition:
    opacity 0.45s ease,
    letter-spacing 0.45s ease,
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.side-index.is-shown .side-index-item {
  transform: translateX(0);
}

.side-index.is-shown .side-index-item:nth-child(2) { transition-delay: 0.05s; }
.side-index.is-shown .side-index-item:nth-child(3) { transition-delay: 0.12s; }
.side-index.is-shown .side-index-item:nth-child(4) { transition-delay: 0.19s; }
.side-index.is-shown .side-index-item:nth-child(5) { transition-delay: 0.26s; }
.side-index.is-shown .side-index-item:nth-child(6) { transition-delay: 0.33s; }

.side-index-item:hover {
  opacity: 0.7;
  letter-spacing: 0.1em;
}

.side-index-item.is-active {
  opacity: 0.88;
  letter-spacing: 0.1em;
  font-weight: 700;
}

/* 短横线只画在文字与竖轨之间的空隙里，不压字 */
.side-index-item.is-active::after {
  content: '';
  position: absolute;
  left: calc(100% + 2px);
  top: 50%;
  width: 0;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
  transform: translateY(-50%);
  animation: indexInkGrow 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  pointer-events: none;
}

@keyframes indexInkGrow {
  from { width: 0; opacity: 0; }
  to { width: 8px; opacity: 0.4; }
}

@media (max-width: 860px) {
  .side-index {
    right: 8px;
  }

  .side-index-item {
    font-size: 0.8rem;
    letter-spacing: 0.4em;
  }

  .side-index-item.is-active {
    letter-spacing: 0.08em;
  }
}

@media (max-width: 560px) {
  .side-index {
    top: 12px;
    bottom: auto;
    right: 12px;
    transform: translate(8px, 0);
  }

  .side-index.is-shown {
    transform: translate(0, 0);
  }

  .side-index-list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-items: flex-end;
    gap: 6px 10px;
    max-width: 68vw;
    padding-right: 0;
  }

  .side-index-list::before,
  .side-index-needle {
    display: none;
  }

  .side-index-item {
    padding-right: 0;
    font-size: 0.58rem;
    letter-spacing: 0.02em;
  }

  .side-index-item.is-active {
    letter-spacing: 0.04em;
  }

  .side-index-item.is-active::after {
    display: none;
  }
}

.quote {
  font-size: 1.9em;
  font-family: 'PT Sans Narrow', serif;
  font-weight: normal;
  color: #000000;
  opacity: 0;
  margin: 0;
  line-height: 1.25;
}

.quote2 {
  margin: 0;
  font-size: 1.9em;
  font-family: 'PT Sans Narrow', serif;
  font-weight: normal;
  color: #000000;
  opacity: 0;
  line-height: 1.25;
}

.author {
  font-size: 1.8em;
  font-weight: bold;
  font-family: 'PT Sans Narrow', serif;
  color: #000000;
  margin: 2px 0 0;
  opacity: 0;
  line-height: 1.25;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: block;
  text-decoration: none;
  opacity: 0;
  z-index: 998;
  cursor: pointer;
  padding: 8px 16px;
}

.scroll-cue {
  position: relative;
  display: block;
  width: 1px;
  height: 52px;
  margin: 0 auto;
}

.scroll-cue-rail {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0),
    rgba(0, 0, 0, 0.22) 18%,
    rgba(0, 0, 0, 0.22) 82%,
    rgba(0, 0, 0, 0)
  );
  transform-origin: top center;
  transform: scaleY(0);
}

.scroll-cue-bead {
  position: absolute;
  left: 50%;
  top: 0;
  width: 5px;
  height: 5px;
  margin-left: -2.5px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.08);
}

.scroll-hint.is-visible {
  opacity: 1;
  transition: opacity 1.2s ease;
}

.scroll-hint.is-visible .scroll-cue-rail {
  animation: cueRailDraw 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.scroll-hint.is-visible .scroll-cue-bead {
  animation: cueBeadFall 2.6s cubic-bezier(0.45, 0, 0.2, 1) 1.15s infinite;
}

.scroll-hint.is-hidden {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.scroll-hint:hover .scroll-cue-bead {
  background: rgba(0, 0, 0, 0.8);
}

@keyframes cueRailDraw {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

@keyframes cueBeadFall {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0.7);
  }
  14% {
    opacity: 1;
    transform: translateY(4px) scale(1);
  }
  78% {
    opacity: 0.7;
    transform: translateY(42px) scale(0.95);
  }
  100% {
    opacity: 0;
    transform: translateY(48px) scale(0.6);
  }
}

@media (max-width: 720px) {
  .scroll-hint {
    bottom: 12px;
  }

  .quote,
  .quote2 {
    font-size: 16px;
  }

  .author {
    font-size: 18px;
  }

  .quote-container.is-lifted {
    transform: translateY(-64px);
  }
}

.drawer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.drawer li {
  font-size: 1.2em;
  color: black;
  margin-bottom: 5px;
  margin-left: 15px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  cursor: pointer;
}

.drawer li a {
  color: inherit;
  text-decoration: none;
}

.drawer li span {
  position: relative;
  display: inline-block;
  padding-bottom: 10px;
}

.drawer li span::before {
  content: '';
  position: absolute;
  bottom: 12px;
  left: 0;
  width: 45%;
  height: 8px;
  z-index: -1;
  transition: width 0.3s ease;
  opacity: 40%;
}

.drawer li:hover span::before {
  width: 80%;
}

.analysis span::before {
  background: linear-gradient(to right, #ff5f6d, #ffc371);
}

.models span::before {
  background: linear-gradient(to right, #0093E9, #80D0C7);
}

.philosophy span::before {
  background: linear-gradient(to right, #f46b45, #eea849);
}

.comparisons span::before {
  background: linear-gradient(to right, #8E2DE2, #4A00E0);
}

.clickable-email {
  color: black;
  text-decoration: none;
  cursor: pointer;
  opacity: 60%;
}

.clickable-email:hover {
  text-decoration: underline;
}

.site-footer {
  padding: 20px 16px 28px;
  text-align: center;
}

.product-section--others .site-footer {
  flex-shrink: 0;
  margin-top: auto;
  padding: 36px 16px 48px;
  position: relative;
  z-index: 2;
}

.site-footer--on-dark .bl {
  color: rgba(238, 244, 239, 0.45);
}

.bl {
  color: gray;
  font-size: small;
  text-decoration: none;
}

.bl:hover {
  text-decoration: underline;
}

/* ===== 产品详情区块（各自独立风格） ===== */

.product-section {
  position: relative;
  overflow: hidden;
}

/* --- EverEcho --- */

.product-section--everecho {
  color: #e8e4d8;
  background:
    radial-gradient(ellipse 55% 45% at 78% 58%, rgba(120, 158, 168, 0.2), transparent 58%),
    radial-gradient(ellipse 40% 35% at 18% 18%, rgba(196, 168, 118, 0.1), transparent 55%),
    linear-gradient(165deg, #080c12 0%, #121a24 48%, #1a2836 100%);
}

.echo-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.echo-star {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: calc(2px * var(--s));
  height: calc(2px * var(--s));
  border-radius: 50%;
  background: rgba(232, 228, 216, 0.55);
  box-shadow: 0 0 6px rgba(232, 228, 216, 0.35);
  animation: echoTwinkle 5.5s ease-in-out infinite;
}

.echo-star:nth-child(odd) {
  animation-delay: 1.4s;
}

@keyframes echoTwinkle {
  0%, 100% { opacity: 0.25; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.4); }
}

.echo-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
  height: 100%;
  padding: 80px 7vw 48px;
  box-sizing: border-box;
}

.echo-kicker {
  margin: 0 0 14px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  opacity: 0.5;
}

.echo-copy h1 {
  margin: 0;
  font-family: 'Libre Baskerville', 'Noto Serif SC', serif;
  font-size: clamp(1.85rem, 4.2vw, 2.85rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  opacity: 0;
}

.echo-tag {
  margin: 18px 0 0;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(196, 168, 118, 0.92);
  opacity: 0;
}

.echo-lead {
  margin: 22px 0 0;
  max-width: 22em;
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.85;
  color: rgba(232, 228, 216, 0.72);
  opacity: 0;
}

.echo-cta {
  display: inline-block;
  margin-top: 34px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #0c1016;
  text-decoration: none;
  background: #e8e4d8;
  padding: 12px 22px;
  transition: transform 0.25s ease, background 0.25s ease;
  opacity: 0;
}

.echo-cta:hover {
  background: #f4f0e6;
  transform: translateY(-2px);
}

.echo-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: min(52vh, 420px);
  opacity: 0;
}

.echo-globe {
  position: relative;
  z-index: 2;
  width: min(42vw, 280px);
  height: min(42vw, 280px);
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(232, 228, 216, 0.35), transparent 28%),
    radial-gradient(circle at 62% 58%, rgba(70, 120, 130, 0.55), transparent 42%),
    linear-gradient(145deg, #2a4550 0%, #1a3038 42%, #0f1c22 100%);
  box-shadow:
    inset -18px -12px 40px rgba(0, 0, 0, 0.45),
    0 0 60px rgba(120, 158, 168, 0.18);
}

.echo-globe-shine {
  position: absolute;
  inset: 12% 18% auto auto;
  width: 28%;
  height: 18%;
  border-radius: 50%;
  background: rgba(232, 228, 216, 0.22);
  filter: blur(2px);
}

.echo-globe-band {
  position: absolute;
  left: -4%;
  right: -4%;
  top: 48%;
  height: 18%;
  border-radius: 50%;
  border: 1px solid rgba(196, 168, 118, 0.28);
  transform: rotate(-18deg);
}

.echo-orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(232, 228, 216, 0.14);
  pointer-events: none;
}

.echo-orbit--outer {
  width: min(58vw, 400px);
  height: min(58vw, 400px);
  border-style: dashed;
  border-color: rgba(196, 168, 118, 0.22);
}

.echo-orbit--mid {
  width: min(50vw, 340px);
  height: min(50vw, 340px);
  border-color: rgba(232, 228, 216, 0.12);
}

.echo-ripple {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(196, 168, 118, 0.28);
  animation: echoRipple 4.8s ease-out infinite;
}

.echo-ripple--a {
  width: min(46vw, 300px);
  height: min(46vw, 300px);
}

.echo-ripple--b {
  width: min(46vw, 300px);
  height: min(46vw, 300px);
  animation-delay: 2.4s;
}

@keyframes echoRipple {
  0% {
    transform: scale(0.72);
    opacity: 0.55;
  }
  100% {
    transform: scale(1.55);
    opacity: 0;
  }
}

/* --- 摸鱼单词 --- */

.product-section--moyu {
  color: #e8f2f5;
  background:
    radial-gradient(ellipse 80% 50% at 70% 10%, rgba(120, 190, 210, 0.22), transparent 60%),
    linear-gradient(160deg, #0d2a33 0%, #1a4a56 42%, #2d6b78 100%);
}

.word-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.word-chip {
  position: absolute;
  left: var(--x);
  top: var(--y);
  font-family: 'Libre Baskerville', 'Noto Serif SC', serif;
  font-style: italic;
  font-size: clamp(0.9rem, 2vw, 1.35rem);
  color: rgba(232, 242, 245, 0.18);
  letter-spacing: 0.04em;
  opacity: 0;
  animation: floatWord 9s ease-in-out infinite;
  animation-delay: var(--d);
}

@keyframes floatWord {
  0%, 100% { transform: translateY(0); opacity: 0.2; }
  50% { transform: translateY(-14px); opacity: 0.45; }
}

.moyu-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 48px;
  align-items: center;
  height: 100%;
  padding: 80px 7vw 48px;
  box-sizing: border-box;
}

.moyu-kicker {
  margin: 0 0 16px;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.55;
}

.moyu-intro h1 {
  margin: 0;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.06em;
  opacity: 0;
}

.moyu-lead {
  margin: 24px 0 0;
  max-width: 22em;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.85;
  opacity: 0;
  color: rgba(232, 242, 245, 0.78);
}

.moyu-downloads {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  opacity: 0;
}

.moyu-downloads a {
  font-size: 1.05rem;
  font-weight: 700;
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid rgba(232, 242, 245, 0.45);
  padding-bottom: 4px;
  transition: border-color 0.2s ease;
}

.moyu-downloads a:hover {
  border-color: #fff;
}

.moyu-stage {
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
}

.moyu-shot {
  max-width: min(100%, 520px);
  max-height: 70vh;
  width: auto;
  border-radius: 12px;
  box-shadow: 0 28px 60px rgba(5, 20, 28, 0.45);
}

/* --- AppMask --- */

.product-section--appmask {
  color: #f3efe4;
  background:
    radial-gradient(circle at 85% 20%, rgba(212, 180, 90, 0.12), transparent 40%),
    linear-gradient(180deg, #0c0c0b 0%, #161614 55%, #1c1b18 100%);
}

.mask-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 40px;
  align-items: center;
  height: 100%;
  padding: 80px 7vw 48px;
  box-sizing: border-box;
}

.mask-kicker {
  margin: 0 0 14px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: #d4b45a;
  opacity: 0.85;
}

.mask-panel h1 {
  margin: 0;
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: clamp(2.8rem, 8vw, 4.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  opacity: 0;
}

.mask-lead {
  margin: 22px 0 0;
  max-width: 24em;
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(243, 239, 228, 0.7);
  opacity: 0;
}

.mask-cta {
  display: inline-block;
  margin-top: 36px;
  padding: 14px 28px;
  background: #d4b45a;
  color: #12110e;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.04em;
  opacity: 0;
  transition: transform 0.2s ease, background 0.2s ease;
}

.mask-cta:hover {
  background: #e4c86e;
  transform: translateY(-2px);
}

.mask-stage {
  display: flex;
  justify-content: center;
  opacity: 0;
}

.mask-stack {
  position: relative;
  width: min(100%, 480px);
  aspect-ratio: 4 / 3;
}

.mask-layer {
  position: absolute;
  inset: 8% 6%;
  border: 1px solid rgba(212, 180, 90, 0.25);
  background: rgba(255, 255, 255, 0.03);
}

.mask-layer--back {
  transform: translate(-18px, 14px) rotate(-3deg);
}

.mask-layer--mid {
  transform: translate(14px, -10px) rotate(2.5deg);
  border-color: rgba(212, 180, 90, 0.4);
}

.mask-shot {
  position: absolute;
  inset: 10% 8%;
  width: auto;
  max-width: 84%;
  max-height: 80%;
  margin: auto;
  object-fit: contain;
  border-radius: 6px;
  z-index: 2;
}

.mask-folder {
  position: absolute;
  right: -4%;
  bottom: 6%;
  width: 88px;
  height: 68px;
  z-index: 3;
}

.mask-folder span:first-child {
  position: absolute;
  top: 0;
  left: 10px;
  width: 36px;
  height: 14px;
  background: #d4b45a;
  border-radius: 4px 8px 0 0;
  opacity: 0.9;
}

.mask-folder span:last-child {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 52px;
  background: linear-gradient(180deg, #e4c86e, #c4a35a);
  border-radius: 6px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

/* --- Upet --- */

.product-section--upet {
  color: #2a211c;
  background:
    radial-gradient(ellipse 60% 40% at 20% 90%, rgba(232, 164, 138, 0.35), transparent 55%),
    linear-gradient(150deg, #f7e4d8 0%, #f0c9b8 45%, #e8a48a 100%);
}

.upet-blobs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.45;
}

.blob-a {
  width: 280px;
  height: 280px;
  background: #ffc9a8;
  top: 8%;
  right: 12%;
}

.blob-b {
  width: 220px;
  height: 220px;
  background: #c46b55;
  bottom: 12%;
  left: 8%;
  opacity: 0.25;
}

.upet-main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  height: 100%;
  padding: 80px 7vw 48px;
  box-sizing: border-box;
}

.upet-kicker {
  margin: 0 0 12px;
  font-family: 'Fredoka', 'Noto Sans SC', sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8a4f3d;
  opacity: 0.75;
}

.upet-hero-copy h1 {
  margin: 0;
  font-family: 'Fredoka', 'Noto Serif SC', sans-serif;
  font-size: clamp(3.2rem, 9vw, 5.5rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0;
}

.upet-lead {
  margin: 20px 0 0;
  max-width: 18em;
  font-size: 1.1rem;
  line-height: 1.8;
  color: rgba(42, 33, 28, 0.72);
  opacity: 0;
}

.upet-cta {
  display: inline-block;
  margin-top: 32px;
  padding: 14px 30px;
  background: #2a211c;
  color: #f7e4d8;
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
  opacity: 0;
  transition: transform 0.2s ease, background 0.2s ease;
}

.upet-cta:hover {
  background: #3d3028;
  transform: translateY(-3px) scale(1.02);
}

.key-strip {
  display: flex;
  gap: 10px;
  margin-top: 40px;
  opacity: 0;
}

.key {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(42, 33, 28, 0.12);
  border-radius: 8px;
  font-family: 'Fredoka', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 0 rgba(42, 33, 28, 0.12);
}

.upet-stage {
  display: flex;
  justify-content: center;
  opacity: 0;
}

.upet-shot {
  max-width: min(100%, 440px);
  max-height: 65vh;
  border-radius: 16px;
  box-shadow: 0 24px 50px rgba(100, 50, 35, 0.28);
}

/* --- 其他项目 --- */

.product-section--others {
  color: #eef4ef;
  background:
    radial-gradient(ellipse 70% 50% at 10% 0%, rgba(168, 195, 176, 0.25), transparent 55%),
    linear-gradient(165deg, #24352c 0%, #3d5548 48%, #5a7564 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  box-sizing: border-box;
}

.others-head {
  padding: 56px 7vw 20px;
  max-width: 720px;
  flex-shrink: 0;
}

.others-kicker {
  margin: 0 0 12px;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.5;
}

.others-head h1 {
  margin: 0;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  opacity: 0;
}

.others-sub {
  margin: 16px 0 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(238, 244, 239, 0.65);
  opacity: 0;
}

.others-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  padding: 0 7vw;
  border-top: 1px solid rgba(238, 244, 239, 0.12);
  flex: 0 1 auto;
  min-height: 0;
}

.others-item {
  display: block;
  padding: 22px 28px 26px;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid rgba(238, 244, 239, 0.12);
  opacity: 0;
  transform: translateY(24px);
  transition: background 0.25s ease;
}

.others-item:nth-child(odd) {
  border-right: 1px solid rgba(238, 244, 239, 0.12);
}

.others-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.others-icon-wrap {
  width: 52px;
  height: 52px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.others-icon-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 12px;
}

.others-item h2 {
  margin: 0;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.35rem;
  font-weight: 700;
}

.others-item p {
  margin: 12px 0 0;
  max-width: 28em;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(238, 244, 239, 0.62);
}

@media (max-width: 860px) {
  .moyu-main,
  .mask-layout,
  .upet-main,
  .echo-main {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 110px;
  }

  .echo-stage {
    min-height: min(36vh, 280px);
    order: -1;
  }

  .echo-globe {
    width: min(48vw, 200px);
    height: min(48vw, 200px);
  }

  .echo-orbit--outer {
    width: min(70vw, 280px);
    height: min(70vw, 280px);
  }

  .echo-orbit--mid {
    width: min(60vw, 240px);
    height: min(60vw, 240px);
  }

  .moyu-shot {
    max-height: 48vh;
  }

  .mask-stack {
    width: min(100%, 360px);
  }

  .key-strip {
    flex-wrap: wrap;
  }

  /* 手机单列：列表可滚动，备案固定在区块底部，避免与最后一项重叠 */
  .section.product-section.product-section--others {
    height: 100vh;
    height: 100dvh;
    max-height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }

  .others-grid {
    grid-template-columns: 1fr;
    padding-left: 6vw;
    padding-right: 6vw;
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }

  .others-item:nth-child(odd) {
    border-right: none;
  }

  .others-item {
    padding: 16px 0 18px;
  }

  .others-item h2 {
    font-size: 1.1rem;
  }

  .others-item p {
    margin-top: 6px;
    font-size: 0.85rem;
    line-height: 1.5;
  }

  .others-icon-wrap {
    width: 40px;
    height: 40px;
    margin-bottom: 8px;
  }

  .others-head {
    flex-shrink: 0;
    padding: 64px 6vw 8px;
  }

  .others-head h1 {
    font-size: clamp(1.75rem, 7vw, 2.4rem);
  }

  .others-sub {
    margin-top: 10px;
    font-size: 0.92rem;
  }

  .product-section--others .site-footer {
    flex-shrink: 0;
    margin-top: 0;
    padding: 14px 16px max(22px, calc(12px + env(safe-area-inset-bottom, 0px)));
    background: #5a7564;
  }
}