* {
  box-sizing: border-box;
}

:root {
  --bg: #050508;
  --text: #ffffff;
  --muted: rgba(255,255,255,.72);
  --line: rgba(255,255,255,.14);
  --pink: #f1204a;
  --cyan: #2dccd3;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

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

[hidden] {
  display: none !important;
}

.page-shell {
  min-height: 100vh;
  background: var(--bg);
  /* clip: 裁剪内容但不创建 scroll container，不影响子元素 position:sticky */
  overflow-x: clip;
}

.mobile-hero-root {
  position: relative;
  height: 100vh;
  height: calc(var(--app-vh, 1vh) * 100);
  height: 100dvh;
  min-height: 100vh;
  min-height: calc(var(--app-vh, 1vh) * 100);
  overflow: hidden;
  isolation: isolate;
  transform: translate3d(0,0,0);
  backface-visibility: hidden;
  background-color: #0b0b12;
  background-image:
    radial-gradient(120% 90% at 20% 18%, rgba(241,32,74,.28), transparent 60%),
    radial-gradient(120% 100% at 80% 92%, rgba(112,0,255,.28), transparent 60%),
    linear-gradient(180deg, #1a1320 0%, #0a0a14 100%);
}

.mobile-hero-root::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(0,0,0,.12) 0%, transparent 20%, transparent 70%, rgba(0,0,0,.45) 100%);
}

.mobile-hero-root::before {
  content: "";
  position: absolute;
  bottom: calc(50px + env(safe-area-inset-bottom));
  left: 50%;
  z-index: 12;
  width: 24px;
  height: 24px;
  margin-left: -12px;
  opacity: .58;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9l6 6 6-6'/></svg>");
  background-size: contain;
  animation: v3-down 1.8s ease-in-out infinite;
}

@keyframes v3-down {
  0%, 100% { transform: translateY(0); opacity: .45; }
  50% { transform: translateY(8px); opacity: .8; }
}

.mobile-hero-media,
.hero-video,
.hero-poster {
  position: absolute;
  inset: 0;
}

.mobile-hero-media {
  z-index: 0;
  contain: paint;
  transform: translate3d(0,0,0);
  backface-visibility: hidden;
}

.hero-video,
.hero-poster {
  width: 100%;
  height: 100%;
}

.hero-video {
  object-fit: cover;
  object-position: center;
  background: transparent;
  pointer-events: none;
  backface-visibility: hidden;
}

.hero-poster {
  z-index: -1;
  background-position: center;
  background-size: cover;
  transform: scale(1.015);
}

.mobile-hero-logo {
  position: absolute;
  top: max(16px, env(safe-area-inset-top));
  left: max(16px, env(safe-area-inset-left));
  z-index: 20;
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 8px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.4));
}

.hero-soundbtn,
.hero-bizbtn {
  position: absolute;
  top: max(16px, env(safe-area-inset-top));
  z-index: 20;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  transition: background-color .2s ease, color .2s ease, transform .2s ease;
}

.hero-soundbtn {
  right: calc(max(14px, env(safe-area-inset-right)) + 50px);
  padding: 0;
  background: rgba(0,0,0,.5);
}

.hero-bizbtn {
  right: max(14px, env(safe-area-inset-right));
  background: rgba(0,0,0,.3);
  color: rgba(255,255,255,.9);
}

.hero-bizbtn:hover {
  background: rgba(255,255,255,.9);
  color: rgba(0,0,0,.8);
  transform: scale(1.1);
}

.hero-soundbtn:hover {
  background: rgba(0,0,0,.68);
}

.hero-soundbtn.is-on {
  background: rgba(0,0,0,.38);
}

.hero-soundbtn svg,
.hero-bizbtn svg {
  fill: currentColor;
  flex-shrink: 0;
}

.hero-soundbtn svg {
  width: 20px;
  height: 20px;
}

.hero-bizbtn svg {
  width: 16px;
  height: 16px;
}

.hero-soundbtn .sound-on-mark {
  display: none;
}

.hero-soundbtn.is-on .sound-off-mark {
  display: none;
}

.hero-soundbtn.is-on .sound-on-mark {
  display: block;
}

.mobile-hero-content {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 0 16px;
}

.mobile-hero-skeleton {
  position: absolute;
  left: 32px;
  right: 32px;
  top: 50%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: translateY(-50%);
  transition: opacity .28s ease, visibility .28s ease;
}

.mobile-hero-skeleton > * + * {
  margin-top: 22px;
}

.hero-skeleton-block {
  overflow: hidden;
  background: rgba(255,255,255,.16);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.1);
  position: relative;
}

.hero-skeleton-block::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.22), transparent);
  transform: translateX(-100%);
  animation: v3-skeleton 1.25s ease-in-out infinite;
}

.skel-slogan {
  width: min(320px, 86vw);
  height: 34px;
  border-radius: 999px;
}

.skel-btn-row {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.skel-btn-row > * + * {
  margin-left: 8px;
}

.skel-btn {
  width: 109px;
  height: clamp(38px, 11vw, 48px);
  border-radius: 999px;
}

@keyframes v3-skeleton {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.mobile-hero-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 3;
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s ease, visibility .35s ease;
}

body.is-hero-ready .mobile-hero-stack,
body.is-ready .mobile-hero-stack {
  opacity: 1;
  visibility: visible;
}

body.is-hero-ready .mobile-hero-skeleton,
body.is-ready .mobile-hero-skeleton {
  opacity: 0;
  visibility: hidden;
}

.mobile-hero-stack > * + * {
  margin-top: 22px;
}

.hero-slogan {
  position: relative;
  display: inline-block;
  line-height: 0;
  vertical-align: middle;
}

.mobile-hero-slogan {
  max-width: 86%;
  width: min(320px, 86vw);
  filter: drop-shadow(0 4px 16px rgba(0,0,0,.45));
}

.hero-slogan-img {
  display: block;
  width: 100%;
  height: auto;
}

.mobile-hero-cta-block {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
}

.hero-slogan-glass {
  display: none;
  position: absolute;
  left: 32.9%;
  width: 34.2%;
  top: 4%;
  height: 92%;
  overflow: hidden;
  pointer-events: none;
  border-radius: 2px;
  isolation: isolate;
}

html[data-app-mode="game"] .hero-slogan-glass {
  display: block;
}

.hero-slogan-glass-sweep {
  position: absolute;
  top: -25%;
  left: -100%;
  width: 50%;
  height: 150%;
  background: linear-gradient(
    108deg,
    hsla(0,0%,100%,0),
    hsla(0,0%,100%,.15) 30%,
    hsla(0,0%,100%,.85) 46%,
    #fff 50%,
    hsla(0,0%,100%,.85) 54%,
    hsla(0,0%,100%,.15) 70%,
    hsla(0,0%,100%,0)
  );
  transform: skewX(-14deg);
  mix-blend-mode: overlay;
  filter: blur(.5px);
  animation: hero-slogan-glass-sweep 2s cubic-bezier(.4,0,.2,1) infinite;
}

.hero-slogan-glass-sweep::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(108deg, transparent 44%, hsla(0,0%,100%,.55) 50%, transparent 56%);
  mix-blend-mode: screen;
}

@keyframes hero-slogan-glass-sweep {
  0%, 18% { left: -100%; opacity: 0; }
  28% { opacity: 1; }
  62% { left: 130%; opacity: 1; }
  72%, 100% { left: 130%; opacity: 0; }
}

.mobile-hero-float-tags {
  position: absolute;
  top: calc(100% + 44px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px 10px;
  width: max-content;
  max-width: min(340px, 92vw);
  margin: 0;
  pointer-events: none;
}

.mobile-hero-float-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .02em;
  color: #fff;
  white-space: nowrap;
  background: linear-gradient(135deg, rgba(255,196,0,.92), rgba(255,87,34,.92));
  border: 1px solid hsla(0,0%,100%,.35);
  box-shadow: 0 4px 14px rgba(255,120,0,.35), inset 0 1px 0 hsla(0,0%,100%,.25);
  text-shadow: 0 1px 2px rgba(0,0,0,.25);
  animation: mobile-hero-float-tag 2.8s ease-in-out infinite;
  will-change: transform;
}

.mobile-hero-float-tag:nth-child(2) {
  background: linear-gradient(135deg, rgba(255,106,0,.92), rgba(255,61,113,.92));
  box-shadow: 0 4px 14px rgba(255,61,113,.35), inset 0 1px 0 hsla(0,0%,100%,.25);
}

.mobile-hero-float-tag:nth-child(3) {
  background: linear-gradient(135deg, rgba(22,119,255,.95), rgba(0,200,150,.92));
  box-shadow: 0 4px 14px rgba(22,119,255,.35), inset 0 1px 0 hsla(0,0%,100%,.25);
}

.mobile-hero-float-tag:nth-child(4) {
  background: linear-gradient(135deg, rgba(168,85,247,.95), rgba(236,72,153,.92));
  box-shadow: 0 4px 14px rgba(168,85,247,.35), inset 0 1px 0 hsla(0,0%,100%,.25);
}

@keyframes mobile-hero-float-tag {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

@keyframes mobile-hero-float-tags-shell {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-5px); }
}

@media (max-width: 767px) {
  .mobile-hero-cta-block .mobile-hero-float-tags {
    animation: mobile-hero-float-tags-shell 2.8s ease-in-out infinite;
  }

  .mobile-hero-cta-block .mobile-hero-float-tag {
    animation: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slogan-glass-sweep,
  .mobile-hero-cta-block .mobile-hero-float-tags,
  .mobile-hero-float-tag {
    animation: none;
  }

  .hero-slogan-glass-sweep {
    opacity: 0;
  }
}

html[data-app-mode="game"] .mobile-hero-logo {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

html[data-app-mode="game"] .mobile-hero-slogan {
  width: min(360px, 92vw);
  max-width: 92%;
}

html[data-app-mode="game"] .mobile-hero-stack > * + * {
  margin-top: 16px;
}

html[data-app-mode="game"] .mobile-hero-root {
  padding-bottom: 72px;
}

html[data-app-mode="game"] .feature-item h3 {
  background: linear-gradient(90deg, #2dccd3 0%, #f1204a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 20px;
  line-height: 1.35;
}

html[data-app-mode="game"] .feature-image {
  width: min(280px, 78vw);
  border-radius: 16px;
}

html[data-app-mode="game"] .feature-pc-tab.is-active {
  background: linear-gradient(90deg, rgba(45,204,211,.18), rgba(241,32,74,.18));
}

.mobile-hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-width: 0;
}

.mobile-hero-buttons > * + * {
  margin-left: 8px;
}

.dl-btn {
  display: inline-flex;
  flex-shrink: 1;
  min-width: 0;
  transition: transform .16s ease, opacity .16s ease;
}

.dl-btn:active {
  transform: scale(.96);
  opacity: .85;
}

.dl-btn--vpn {
  pointer-events: none;
}

.mobile-hero-btn-img {
  height: clamp(38px, 11vw, 48px);
  width: auto;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 4px 14px rgba(0,0,0,.36));
}

.feature-section {
  position: relative;
  padding: 42px 20px 46px;
  background: #050508;
}

.section-head {
  width: min(1120px, 100%);
  margin: 0 auto 26px;
}

.section-head--center {
  text-align: center;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(24px, 7vw, 44px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: 0;
}

.feature-list {
  width: min(960px, 100%);
  margin: 0 auto;
}

.feature-item {
  padding: 8px 0 28px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,.14);
  opacity: 0;
  transform: translateY(36px) scale(.96);
  transition: opacity .72s cubic-bezier(.22,1,.36,1), transform .72s cubic-bezier(.22,1,.36,1);
}

.feature-item.in-view {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.feature-item + .feature-item {
  margin-top: 20px;
}

.feature-image {
  width: min(230px, 62vw);
  margin: 0 auto 16px;
  border-radius: 8px;
  object-fit: cover;
  filter: drop-shadow(0 14px 28px rgba(0,0,0,.32));
}

.feature-item h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 900;
  line-height: 1.25;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.feature-item p {
  max-width: 520px;
  margin: 0 auto;
  color: rgba(255,255,255,.72);
  font-size: 15px;
  line-height: 1.75;
}

.steps-section {
  background: #fff;
  color: rgba(30,12,0,.92);
}

.steps-heading {
  padding: 46px 22px 22px;
  text-align: center;
}

.steps-heading span {
  display: block;
  margin-bottom: 8px;
  color: #c04800;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .18em;
}

.steps-heading h2 {
  margin: 0;
  font-size: 22px;
  line-height: 1.28;
}

.steps-stack {
  position: relative;
}

.stack-card {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  min-height: 620px;
  padding: clamp(22px, 4vh, 40px) 20px clamp(72px, 12vh, 120px);
  background: #fff;
  border-radius: 24px 24px 0 0;
  box-shadow: 0 -10px 30px rgba(0,0,0,.08);
  transform-origin: top center;
  will-change: transform, opacity;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}


.stack-card:nth-child(1) { z-index: 1; border-radius: 0; box-shadow: none; }
.stack-card:nth-child(2) { z-index: 2; }
.stack-card:nth-child(3) { z-index: 3; }
.stack-card:nth-child(4) { z-index: 4; }
.stack-card:nth-child(5) { z-index: 5; }
.stack-card:nth-child(6) { z-index: 6; }
.stack-card:nth-child(7) { z-index: 7; }

.step-texture {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(rgba(0,0,0,.05) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: .6;
}

.step-top {
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  margin-bottom: 14px;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  margin-bottom: 12px;
  border-radius: 100px;
  background: rgba(192,72,0,.10);
  border: 1px solid rgba(192,72,0,.20);
}

.step-badge-num {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .16em;
  color: #c04800;
  text-transform: uppercase;
}

.step-badge-sep {
  font-size: 11px;
  font-weight: 700;
  color: rgba(192,72,0,.5);
}

.step-card h3 {
  margin: 0;
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
  color: rgba(30,12,0,.94);
  letter-spacing: -.015em;
}

.step-img-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
  margin-bottom: 14px;
}

.step-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: 100%;
  object-fit: contain;
  border-radius: 16px;
  filter: drop-shadow(0 16px 24px rgba(0,0,0,.14));
}

/* =========================================================
   更多精彩内容 — caseStudiesCarousel 布局
   ========================================================= */
.case-section {
  background: #f5f4f4;
  color: #111;
  padding-bottom: 64px;
}

.case-section-head {
  padding: 40px 20px 20px;
  border-bottom: 1px solid rgba(0,0,0,0.10);
}
.case-section-head h2 {
  font-size: 26px;
  font-weight: 800;
  color: rgba(17,17,17,.92);
  margin: 0;
  line-height: 1.25;
}

/* Tab bar — horizontal scroll, no scrollbar */
.case-tabbar {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 20px;
  -ms-overflow-style: none;
  scrollbar-width: none;
  background: none;
  border: none;
}
.case-tabbar::-webkit-scrollbar { display: none; }

.case-tab {
  flex: 0 0 auto;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1px solid rgba(17,17,17,0.16);
  background: transparent;
  font-size: 13px;
  font-weight: 600;
  color: rgba(17,17,17,0.65);
  cursor: pointer;
  white-space: nowrap;
  transition: background .18s, color .18s, border-color .18s;
  -webkit-tap-highlight-color: transparent;
}
.case-tab.is-active {
  background: #111;
  border-color: #111;
  color: #fff;
}
.case-tab:active { transform: scale(0.96); }

/* Case study body — image ABOVE text (column-reverse) */
.case-study {
  display: flex;
  flex-direction: column-reverse;
  gap: 20px;
  margin-top: 8px;
}

/* Slide container */
.case-slide-wrap {
  width: calc(100% - 40px);
  margin: 0 20px;
  height: clamp(280px, 75vw, 420px);
  border-radius: 16px;
  overflow: hidden;
  background: none;
}

.case-slide {
  display: none;
  width: 100%;
  height: 100%;
}
.case-slide.is-active {
  display: block;
  animation: caseSlideIn .45s cubic-bezier(.22,1,.36,1) both;
}
.case-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

@keyframes caseSlideIn {
  from { opacity: 0; transform: translateY(16px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Text area */
.case-text-content {
  padding: 0 20px;
}
.case-study-title {
  font-size: 22px;
  font-weight: 800;
  color: rgba(17,17,17,.90);
  margin: 0 0 10px;
  line-height: 1.25;
}
.case-study-detail {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(17,17,17,.58);
  margin: 0;
}

.mobile-download-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  display: none;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,.96);
  border-top: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 -10px 30px rgba(0,0,0,.12);
  backdrop-filter: blur(14px) saturate(140%);
}

.mobile-download-bar.is-visible {
  display: block;
}

.mobile-download-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 13px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff2d63 0%, var(--pink) 100%);
  color: #fff;
  font-size: 16px;
  font-weight: 900;
  box-shadow: 0 6px 18px rgba(241,32,74,.45);
}

/* PC layout: feature-pc hidden on mobile */
.feature-pc { display: none; }

@media (min-width: 768px) {
  /* ── Hero ── */
  .mobile-hero-root {
    height: 100vh;
    min-height: 720px;
  }

  .mobile-hero-logo {
    width: 48px;
    height: 48px;
  }

  .mobile-hero-slogan {
    width: min(520px, 58vw);
  }

  /* game 模式：PC 不显示福利标签，slogan 尺寸与普通模式一致 */
  html[data-app-mode="game"] .mobile-hero-float-tags {
    display: none;
  }

  html[data-app-mode="game"] .mobile-hero-slogan {
    width: min(520px, 58vw);
    max-width: none;
  }

  html[data-app-mode="game"] .mobile-hero-root {
    padding-bottom: 0;
  }

  html[data-app-mode="game"] .mobile-hero-stack > * + * {
    margin-top: 22px;
  }

  /* PC 端下载按钮：与 tyapp-landing-new 一致，高度 50px，宽度随图比例自动 */
  .mobile-hero-btn-img {
    height: 50px;
  }

  /* PC 端底部悬浮下载栏：容器居中布局，按钮宽度固定 240px */
  .mobile-download-bar {
    justify-content: center;
  }
  .mobile-download-bar.is-visible {
    display: flex;
  }
  .mobile-download-bar a {
    width: 240px;
    flex-shrink: 0;
  }

  /* ── Feature section — PC 三列布局 ── */
  .feature-section {
    padding: 72px 40px 80px;
  }

  /* 隐藏移动端竖列，显示 PC 三列 */
  .feature-list { display: none; }
  .feature-pc {
    display: flex;
    align-items: center;
    gap: 6%;
    max-width: 1100px;
    margin: 0 auto;
  }

  /* 左列：tab 按钮 */
  .feature-pc-tabs {
    flex: 1;
    min-width: 0;
  }

  .feature-pc-tab {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 20px 0;
    background: none;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,.14);
    color: rgba(255,255,255,.45);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    text-align: left;
    transition: color .4s ease;
    position: relative;
  }

  .feature-pc-tab::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 2px;
    background: #f1204a;
    transition: width .5s cubic-bezier(.22,1,.36,1);
  }

  .feature-pc-tab.is-active {
    color: #fff;
  }

  .feature-pc-tab.is-active::after {
    width: 100%;
  }

  /* 中列：手机图（单图，JS 切换 src） */
  .feature-pc-media {
    flex-shrink: 0;
    width: 300px;
    aspect-ratio: 9 / 16;
    border-radius: 20px;
    overflow: hidden;
    background: none;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .feature-pc-main-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 20px;
    opacity: 1;
    transition: opacity .25s ease;
    display: block;
  }

  .feature-pc-main-img.is-switching {
    opacity: 0;
  }

  /* 右列：标题 + 描述 */
  .feature-pc-right {
    flex: 1;
    min-width: 0;
    position: relative;
    min-height: 320px;
    display: flex;
    align-items: center;
  }

  .feature-pc-item {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .45s ease, transform .45s cubic-bezier(.22,1,.36,1);
    pointer-events: none;
  }

  .feature-pc-item.is-active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    transition-delay: .1s;
  }

  .feature-pc-item h3 {
    margin: 0 0 18px;
    font-size: clamp(22px, 2.2vw, 30px);
    font-weight: 900;
    line-height: 1.2;
    background: linear-gradient(135deg, #2dccd3 0%, #f1204a 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .feature-pc-item p {
    margin: 0;
    color: rgba(255,255,255,.72);
    font-size: 15px;
    line-height: 1.85;
    max-width: 420px;
  }

  /* ── Steps section — PC：隐藏移动端，显示滚动驱动版 ── */
  .steps-section { display: none; }
  .steps-pc-wrap { display: block; }

  /* ── Cases section — PC 行布局 ── */
  .case-section-head {
    padding: 56px 60px 24px;
  }

  .case-tabbar {
    padding: 16px 60px 8px;
  }

  .case-study {
    flex-direction: row;
    align-items: center;
    gap: 48px;
    padding: 24px 60px 48px;
    margin-top: 0;
  }

  .case-text-content {
    flex: 0 0 auto;
    width: 300px;
  }

  .case-study-title {
    font-size: 26px;
    margin-bottom: 14px;
  }

  .case-study-detail {
    font-size: 15px;
    line-height: 1.8;
  }

  .case-slide-wrap {
    flex: 1;
    width: auto;
    margin: 0;
    height: clamp(320px, 40vw, 500px);
  }
}

@media (max-width: 380px) {
  .mobile-hero-logo {
    width: 34px;
    height: 34px;
  }

  .mobile-hero-buttons > * + * {
    margin-left: 6px;
  }

  .mobile-hero-btn-img {
    height: 38px;
  }
}

/* =========================================================
   Features — 子元素错峰渐入
   ========================================================= */
.feature-item .feature-image,
.feature-item h3,
.feature-item p {
  transform: translateY(14px);
  transition: transform .6s cubic-bezier(.22,1,.36,1);
}

.feature-item.in-view .feature-image {
  transform: translateY(0);
  transition-delay: .06s;
}

.feature-item.in-view h3 {
  transform: translateY(0);
  transition-delay: .20s;
}

.feature-item.in-view p {
  transform: translateY(0);
  transition-delay: .34s;
}

/* =========================================================
   Steps — subSections 样式（参考 tyapp-landing-new）
   ========================================================= */
.step-subs {
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: env(safe-area-inset-bottom);
}

.step-sub {
  display: flex;
  flex-direction: column;
}

.step-sub-hd {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 3px;
}

.step-sub-bar {
  display: inline-block;
  flex-shrink: 0;
  width: 3px;
  height: 14px;
  background: #c04800;
  border-radius: 2px;
}

.step-sub-hd b {
  font-size: 13px;
  font-weight: 700;
  color: rgba(30,12,0,.85);
}

.step-sub-body {
  margin: 0;
  padding-left: 11px;
  font-size: 12px;
  color: rgba(30,12,0,.62);
  line-height: 1.6;
}

/* =========================================================
   PC Steps — 滚动驱动粘性面板（参考 tyapp-landing-new）
   ========================================================= */
/* 移动端隐藏（媒体查询写在 PC 规则之前，确保不覆盖 display:block） */
@media (max-width: 767px) {
  .steps-pc-wrap { display: none; }
}

@media (min-width: 768px) {
  .steps-pc-track { position: relative; /* height set by JS */ }

  .steps-pc-panel {
    position: sticky;
    top: 0;
    height: 100vh;
    background: #050508;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 -1px 0 rgba(255,255,255,.05), 0 1px 0 rgba(255,255,255,.05);
  }

  /* 科技感背景 */
  .steps-pc-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
  }

  .steps-pc-blob {
    position: absolute;
    width: 55vw;
    height: 55vw;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.12;
    transform: translate(-50%, -50%);
    transition: top .8s cubic-bezier(.4,0,.2,1), left .8s cubic-bezier(.4,0,.2,1);
  }

  .steps-pc-blob1 { background: radial-gradient(circle, #2dccd3 0%, transparent 60%); top: 20%; left: 30%; }
  .steps-pc-blob2 { background: radial-gradient(circle, #f1204a 0%, transparent 60%); top: 70%; left: 65%; }

  .steps-pc-dot-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255,255,255,.12) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.5;
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 10%, rgba(0,0,0,0) 90%);
    mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 10%, rgba(0,0,0,0) 90%);
  }

  /* 区块标题 */
  .steps-pc-header {
    position: relative;
    z-index: 1;
    padding: 36px 80px 16px;
    text-align: center;
    flex-shrink: 0;
  }

  .steps-pc-header span {
    display: block;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .2em;
    color: #c04800;
    text-transform: uppercase;
    margin-bottom: 7px;
  }

  .steps-pc-header h2 {
    margin: 0;
    font-size: 30px;
    font-weight: 800;
    line-height: 1.25;
    color: rgba(255,255,255,.92);
    letter-spacing: -.01em;
  }

  /* 内容区：flex（dots | 12-col grid） */
  .steps-pc-body {
    flex: 1;
    min-height: 0;
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    padding: 0 64px;
    overflow: hidden;
  }

  /* 12 列网格（参考 tyapp-landing-new）：空白 | 空白 | 文字(5) | 空白 | 图片(4) */
  .steps-pc-grid {
    flex: 1;
    min-width: 0;
    height: 100%;
    display: grid;
    grid-template-columns: 2fr 5fr 2fr 3fr;
    /* cols:  skip  text  gap  image */
    column-gap: 0;
    overflow: hidden;
  }

  .steps-pc-text-col {
    grid-column: 2;
    position: relative;
    height: 100%;
    overflow: hidden;
  }

  .steps-pc-img-col {
    grid-column: 4;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    width: auto;
  }

  /* 分页点 */
  .steps-pc-pagination {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-right: 32px;
    flex-shrink: 0;
  }

  .steps-pc-dot {
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 3px;
    background: rgba(255,255,255,.25);
    cursor: pointer;
    transition: background .4s, height .3s;
  }

  .steps-pc-dot.is-active {
    background: rgba(255,255,255,.9);
    height: 18px;
  }

  /* 文字列 */
  .steps-pc-text-col {
    flex: 1;
    position: relative;
    height: 100%;
    overflow: hidden;
  }

  .steps-pc-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 40px;
    padding-right: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .4s linear;
  }

  .steps-pc-text.is-active {
    opacity: 1;
    pointer-events: auto;
  }

  .steps-pc-num {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .16em;
    color: rgba(255,255,255,.45);
    text-transform: uppercase;
    margin-bottom: 14px;
  }

  .steps-pc-text h3 {
    margin: 0 0 18px;
    font-size: clamp(26px, 2.5vw, 36px);
    font-weight: 800;
    line-height: 1.15;
    color: #fff;
    text-shadow: 0 0 24px rgba(255,255,255,.25);
    letter-spacing: -.01em;
  }

  .steps-pc-desc {
    margin: 0 0 16px;
    color: rgba(255,255,255,.55);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .04em;
  }

  .steps-pc-subs {
    display: flex;
    flex-direction: column;
    gap: 18px;
  }

  .steps-pc-sub-label {
    font-size: 12px;
    font-weight: 800;
    color: rgba(255,255,255,.90);
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .steps-pc-sub-bar {
    display: inline-block;
    width: 3px;
    height: 14px;
    background: #00f0ff;
    border-radius: 2px;
    flex-shrink: 0;
  }

  .steps-pc-sub p {
    margin: 0;
    color: rgba(255,255,255,.68);
    line-height: 1.8;
    font-size: 14px;
  }

  /* 图片列（竖向 Swiper，宽度跟随 grid 列自适应） */
  .steps-pc-swiper {
    will-change: transform;
    transition: transform .35s cubic-bezier(.22,1,.36,1);
    flex-shrink: 0;
    width: 100%;
  }

  .steps-pc-slide {
    width: 100%;
    max-width: 280px;
    height: 440px;
    display: flex;
    justify-content: center;
    overflow: hidden;
    transform: scale(.65);
    transition: transform .35s ease;
    transform-origin: center top;
    margin-bottom: 32px;
  }

  .steps-pc-slide.is-active { transform: scale(1); }

  .steps-pc-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 14px;
    display: block;
  }
}

/* =========================================================
   PC 端扫码下载弹窗
   ========================================================= */
.qr-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.65);
  align-items: center;
  justify-content: center;
}
.qr-modal-overlay.is-open {
  display: flex;
}
.qr-modal-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px 32px 24px;
  text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,.4);
  position: relative;
  min-width: 268px;
  animation: qrModalIn .18s ease;
}
@keyframes qrModalIn {
  from { opacity: 0; transform: scale(.94); }
  to   { opacity: 1; transform: scale(1); }
}
.qr-modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 20px;
  color: #aaa;
  line-height: 1;
  padding: 2px 4px;
  transition: color .15s;
}
.qr-modal-close:hover { color: #333; }
.qr-modal-title {
  margin: 0 0 14px;
  font-weight: 600;
  font-size: 15px;
  color: #111;
}
.qr-modal-img-wrap {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  overflow: hidden;
}
.qr-modal-img-wrap img {
  display: block;
  width: 200px;
  height: 200px;
}
.qr-modal-hint {
  margin: 12px 0 0;
  font-size: 12px;
  color: #888;
}