/* ==========================================================================
   Aika Life - 新兴应用 (xxyy) 专属样式表
   基准画布: Figma 3840px * 1939px (100vw = 3840px)
   规范遵循: AGENTS.md 页面级完全样式隔离，禁止污染全局元素
   ========================================================================== */

/* 引入本地 OPPOSans 字体全字重声明 */
@font-face {
  font-family: 'OPPOSans';
  src: url('../fonts/OPPOSans-Light.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'OPPOSans';
  src: url('../fonts/OPPOSans-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'OPPOSans';
  src: url('../fonts/OPPOSans-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'OPPOSans';
  src: url('../fonts/OPPOSans-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'OPPOSans';
  src: url('../fonts/OPPOSans-Heavy.woff2') format('woff2');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

/* ==========================================================================
   页面独立容器与全局隔离
   ========================================================================== */
.xxyy-page-container {
  width: 100%;
  position: relative;
  background-color: #ffffff;
  overflow-x: hidden;
  font-family: 'OPPOSans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #333333;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-page-container *,
.xxyy-page-container *::before,
.xxyy-page-container *::after {
  box-sizing: border-box;
}

/* 优雅淡入上升动画 */
@keyframes xxyyFadeInUp {
  0% {
    opacity: 0;
    transform: translateY(24px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.xxyy-page-container .scroll-reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.85s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.xxyy-page-container .scroll-reveal.is-revealed,
.xxyy-page-container .scroll-reveal.is-in-view {
  opacity: 1;
  transform: translateY(0);
}

.xxyy-page-container .scroll-reveal-delay-1 {
  transition-delay: 0.15s;
}

.xxyy-page-container .scroll-reveal-delay-2 {
  transition-delay: 0.3s;
}

.xxyy-page-container .scroll-reveal-delay-3 {
  transition-delay: 0.45s;
}

/* ==========================================================================
   Section 1: Hero Banner (Figma 基准: 3840px * 1939px, 宽高比 1.9804)
   ========================================================================== */
.xxyy-banner-section {
  position: relative;
  width: 100%;
  aspect-ratio: 3840 / 1939;
  height: auto;
  min-height: 0;
  overflow: hidden;
  background-color: #eaf0f8;
}

/* 背景图层 (自适应居中底图) */
.xxyy-banner-picture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
}

.xxyy-banner-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

/* 文本内容排版绝对定位层 */
.xxyy-banner-content-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

/* 右上角核心理念阐述文案
   Figma 属性: X 2069 (53.88vw), Y 232 (6.042vw), W 1088 (28.33vw), H 449
   OPPOSans Light 42px (1.094vw), line-height: 78px (2.031vw), letter-spacing: 7.5% (0.075em), #333333
*/
.xxyy-banner-desc-box {
  position: absolute;
  left: 53.88vw;
  top: 6.042vw;
  width: 28.333vw;
  z-index: 3;
}

.xxyy-banner-desc-text {
  margin: 0;
  padding: 0;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(14px, 1.094vw, 42px);
  line-height: clamp(24px, 2.031vw, 78px);
  letter-spacing: 0.075em;
  color: #333333;
  text-align: justify;
  text-justify: inter-ideograph;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 左下角主标题群组
   Figma 属性: left 522px (13.594vw), top 1274px (33.177vw / 65.7%), width 685px (17.838vw)
*/
.xxyy-banner-title-group {
  position: absolute;
  left: 13.594vw;
  top: 33.177vw;
  width: 22vw;
  min-width: max-content;
  z-index: 3;
  display: flex;
  flex-direction: column;
}

/* 引文“打造具备”
   Figma 属性: OPPOSans Bold 60px (1.5625vw), line-height: 118px (3.073vw), letter-spacing: 6% (0.06em), #333333
*/
.xxyy-banner-sub-tag {
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 700;
  font-size: clamp(20px, 1.5625vw, 60px);
  line-height: clamp(32px, 3.073vw, 118px);
  letter-spacing: 0.06em;
  color: #333333;
  margin: 0;
  padding: 0;
  white-space: nowrap;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 核心蓝字大标题
   Figma 属性: OPPOSans Bold 95px (2.474vw), line-height: 118px (3.073vw), letter-spacing: 3% (0.03em), #0F00FF
*/
.xxyy-banner-main-title {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 700;
  font-size: clamp(32px, 2.474vw, 95px);
  line-height: clamp(40px, 3.073vw, 118px);
  letter-spacing: 0.03em;
  color: #0F00FF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-banner-main-title span {
  display: block;
  white-space: nowrap;
}

/* 悬浮留资入口 (右下角机器人图标) */
.xxyy-banner-section .xxyy-banner-contact-btn {
  position: absolute !important;
  right: 1.953vw !important;
  bottom: 3.144% !important;
  left: auto !important;
  top: auto !important;
  width: 2.865vw !important;
  height: 2.865vw !important;
  min-width: 44px !important;
  min-height: 44px !important;
  max-width: 72px !important;
  max-height: 72px !important;
  padding: 0;
  border: none;
  background: transparent;
  border-radius: 50%;
  cursor: pointer;
  z-index: 25;
  display: flex !important;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
  pointer-events: auto;
}

.xxyy-banner-section .xxyy-banner-contact-btn img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0, 13, 255, 0.3));
}

.xxyy-banner-section .xxyy-banner-contact-btn:hover {
  transform: translateY(-4px) scale(1.08);
}

/* ==========================================================================
   Section 2: 具身机器人 (Figma 基准: 3840px * 1938px, 宽高比 1.9814)
   ========================================================================== */
.xxyy-robot-section {
  position: relative;
  width: 100%;
  aspect-ratio: 3840 / 1938;
  height: auto;
  min-height: 0;
  overflow: hidden;
  background-color: #f5f5f5;
}

/* 底层高保真背景图 (2 jushen -1.png) */
.xxyy-robot-bg-picture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
}

.xxyy-robot-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

/* 顶层视频遮罩播放层 */
.xxyy-robot-video-wrap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  background-color: #000000;
  overflow: hidden;
  opacity: 1;
  visibility: visible;
  transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1), visibility 1.2s;
}

.xxyy-robot-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

/* 视频播放完成后淡出隐藏 */
.xxyy-robot-section.video-finished .xxyy-robot-video-wrap {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* 文本内容排版层 (视频播放完毕后渐进动态浮现) */
.xxyy-robot-content-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
}

/* 左上角英文大标题
   Figma: left 8.41% (323px / 8.411vw), top 7.02% (136px / 3.542vw), W 1423px (37.057vw)
   OPPOSans Medium 95px (2.474vw), line-height 118px (3.073vw), letter-spacing 3% (0.03em), #0F00FF
*/
.xxyy-robot-title-box {
  position: absolute;
  left: 8.411vw;
  top: 3.542vw;
  width: 38vw;
  min-width: max-content;
  z-index: 11;
  opacity: 0;
  filter: blur(8px);
  transform: translateY(28px);
  transition: opacity 1.3s cubic-bezier(0.16, 1, 0.3, 1), transform 1.3s cubic-bezier(0.16, 1, 0.3, 1), filter 1.3s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform, filter;
}

.xxyy-robot-en-title {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 500;
  font-size: clamp(28px, 2.474vw, 95px);
  line-height: clamp(36px, 3.073vw, 118px);
  letter-spacing: 0.03em;
  color: #0F00FF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-robot-en-title span {
  display: block;
  white-space: nowrap;
}

/* 右上角小文字说明
   Figma: left 2202px (57.344vw), top 136px (3.542vw), W 1315px (34.245vw)
   OPPOSans Light 34px (0.885vw), line-height 61px (1.589vw), letter-spacing 5% (0.05em), #111111
*/
.xxyy-robot-desc-box {
  position: absolute;
  left: 57.344vw;
  top: 3.542vw;
  width: 34.245vw;
  z-index: 11;
  opacity: 0;
  filter: blur(8px);
  transform: translateY(28px);
  transition: opacity 1.5s cubic-bezier(0.16, 1, 0.3, 1), transform 1.5s cubic-bezier(0.16, 1, 0.3, 1), filter 1.5s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform, filter;
}

.xxyy-robot-desc-text {
  margin: 0;
  padding: 0;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(14px, 0.885vw, 34px);
  line-height: clamp(24px, 1.589vw, 61px);
  letter-spacing: 0.05em;
  color: #111111;
  text-align: justify;
  text-justify: inter-ideograph;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 播放完毕后文字渐进显现 (带高科技感柔光解焦与阶梯式缓动浮现) */
.xxyy-robot-section.video-finished .xxyy-robot-title-box {
  opacity: 1;
  filter: blur(0px);
  transform: translateY(0);
  transition-delay: 0.35s;
  pointer-events: auto;
}

.xxyy-robot-section.video-finished .xxyy-robot-desc-box {
  opacity: 1;
  filter: blur(0px);
  transform: translateY(0);
  transition-delay: 0.75s;
  pointer-events: auto;
}

/* ==========================================================================
   Section 3: 商业航天 / 卫星 (Figma 基准: 3840px * 1938px, 宽高比 1.9814)
   ========================================================================== */
.xxyy-satellite-section {
  position: relative;
  width: 100%;
  aspect-ratio: 3840 / 1938;
  height: auto;
  min-height: 0;
  overflow: hidden;
  background-color: #f5f5f5;
}

.xxyy-satellite-bg-picture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
}

.xxyy-satellite-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.xxyy-satellite-content-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  pointer-events: none;
}

/* 左上角小文字说明
   Figma: left 551px (14.349vw), top 190px (4.948vw / 9.804% height), W 1005px (26.172vw)
   OPPOSans Light 34px (0.885vw), line-height 61px (1.589vw), letter-spacing 5% (0.05em), #111111
*/
.xxyy-satellite-desc-box {
  position: absolute;
  left: 14.349vw;
  top: 4.948vw;
  width: 26.172vw;
  z-index: 6;
  pointer-events: auto;
}

.xxyy-satellite-desc-text {
  margin: 0;
  padding: 0;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(14px, 0.885vw, 34px);
  line-height: clamp(24px, 1.589vw, 61px);
  letter-spacing: 0.05em;
  color: #111111;
  text-align: justify;
  text-justify: inter-ideograph;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 右侧大标题群组
   Figma: left 62.94% (62.94vw), top 35.71% (18.022vw)
*/
.xxyy-satellite-title-group {
  position: absolute;
  left: 62.94vw;
  top: 18.022vw;
  width: 35vw;
  min-width: max-content;
  z-index: 6;
  display: flex;
  flex-direction: column;
  pointer-events: auto;
}

/* 英文科技蓝大标题
   Figma: OPPOSans Medium 95px (2.474vw), line-height 118px (3.073vw), letter-spacing 3% (0.03em), #0F00FF
*/
.xxyy-satellite-en-title {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 500;
  font-size: clamp(28px, 2.474vw, 95px);
  line-height: clamp(36px, 3.073vw, 118px);
  letter-spacing: 0.03em;
  color: #0F00FF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-satellite-en-title span {
  display: block;
  white-space: nowrap;
}

/* 中文深灰大标题
   Figma: OPPOSans Bold 96px (2.5vw), line-height 118px (3.073vw), letter-spacing 6% (0.06em), #333333
   与上方英文标题间距 60px (1.56vw)
*/
.xxyy-satellite-cn-title {
  margin-top: clamp(18px, 1.56vw, 60px);
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 700;
  font-size: clamp(28px, 2.5vw, 96px);
  line-height: clamp(36px, 3.073vw, 118px);
  letter-spacing: 0.06em;
  color: #333333;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-satellite-cn-title span {
  display: block;
  white-space: nowrap;
}

/* ==========================================================================
   Section 4: 绿电直连与新能源产业 (Figma 基准: 3840px * 1938px, 宽高比 1.9814)
   ========================================================================== */
.xxyy-green-section {
  position: relative;
  width: 100%;
  aspect-ratio: 3840 / 1938;
  height: auto;
  min-height: 0;
  overflow: hidden;
  background-color: #0b1f3a;
}

.xxyy-green-bg-picture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block;
}

.xxyy-green-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.xxyy-green-content-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  pointer-events: none;
}

/* 右上角中文大标题
   Figma: left 62.94% (62.94vw), top 7.22% (3.646vw), W 1018px (26.51vw)
   OPPOSans Bold 96px (2.5vw), line-height 118px (3.073vw), letter-spacing 6% (0.06em), #FFFFFF
*/
.xxyy-green-top-title-box {
  position: absolute;
  left: 62.94vw;
  top: 3.646vw;
  width: 32vw;
  min-width: max-content;
  z-index: 6;
  pointer-events: auto;
}

.xxyy-green-cn-title {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 700;
  font-size: clamp(28px, 2.5vw, 96px);
  line-height: clamp(36px, 3.073vw, 118px);
  letter-spacing: 0.06em;
  color: #FFFFFF;
  text-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-green-cn-title span {
  display: block;
  white-space: nowrap;
}

/* 左侧核心方案说明段落
   Figma: left 551px (14.349vw), top 456px (11.875vw / 23.53% height), W 1005px (26.172vw)
   OPPOSans Light 34px (0.885vw), line-height 61px (1.589vw), letter-spacing 5% (0.05em), #FFFFFF
*/
.xxyy-green-desc-box {
  position: absolute;
  left: 14.349vw;
  top: 11.875vw;
  width: 26.172vw;
  z-index: 6;
  pointer-events: auto;
}

.xxyy-green-desc-text {
  margin: 0;
  padding: 0;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(14px, 0.885vw, 34px);
  line-height: clamp(24px, 1.589vw, 61px);
  letter-spacing: 0.05em;
  color: #FFFFFF;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  text-align: justify;
  text-justify: inter-ideograph;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 右下角英文大标题
   Figma: left 62.94% (62.94vw), top 83.33% (42.057vw), W 1423px (37.057vw)
   OPPOSans Medium 95px (2.474vw), line-height 118px (3.073vw), letter-spacing 3% (0.03em), #FFFFFF
*/
.xxyy-green-bottom-title-box {
  position: absolute;
  left: 62.94vw;
  top: 42.057vw;
  width: 37vw;
  min-width: max-content;
  z-index: 6;
  pointer-events: auto;
}

.xxyy-green-en-title {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 500;
  font-size: clamp(28px, 2.474vw, 95px);
  line-height: clamp(36px, 3.073vw, 118px);
  letter-spacing: 0.03em;
  color: #FFFFFF;
  text-shadow: 0 4px 16px rgba(0, 0, 0, 0.55);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Section 5: 石墨烯导热散热 产品及应用 (Figma: 3840px * 2836px, 含双 Tab 与页尾交融)
   ========================================================================== */
.xxyy-products-section {
  position: relative;
  width: 100%;
  background-color: #FFFFFF;
  padding-top: clamp(40px, 4.6vw, 180px);
  padding-bottom: 0 !important;
  overflow: visible;
  z-index: 1;
}

.xxyy-products-container {
  width: 100%;
  max-width: 3840px;
  margin: 0 auto;
  padding-left: clamp(24px, 8.5vw, 326px);
  padding-right: clamp(24px, 8.5vw, 326px);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  box-sizing: border-box;
}

/* 左侧列: 英文标题 + 中文大标题 + Tab 导航 */
.xxyy-products-left-col {
  width: clamp(320px, 42vw, 1610px);
  flex-shrink: 0;
  position: relative;
  z-index: 3;
}

/* 英文大标题: OPPOSans Medium 95px, line-height 118px, letter-spacing 3%, #0F00FF */
.xxyy-products-en-title {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 500;
  font-size: clamp(28px, 2.474vw, 95px);
  line-height: clamp(34px, 3.073vw, 118px);
  letter-spacing: 0.03em;
  color: #0F00FF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-products-en-title span {
  display: block;
  white-space: nowrap;
}

/* 中文大标题: OPPOSans Bold 96px, line-height 118px, letter-spacing 6%, #333333 */
.xxyy-products-cn-title {
  margin: clamp(24px, 2.3vw, 88px) 0 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 700;
  font-size: clamp(28px, 2.5vw, 96px);
  line-height: clamp(34px, 3.073vw, 118px);
  letter-spacing: 0.06em;
  color: #333333;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-products-cn-title span {
  display: block;
  white-space: nowrap;
}

/* Tab 选项卡导航: Figma 宽度 899px 基准，保持右侧箭头上下绝对垂直对齐 */
.xxyy-tab-nav {
  margin: clamp(32px, 3.5vw, 130px) 0 0 0;
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 1.2vw, 44px);
  width: clamp(280px, 23.41vw, 899px);
}

.xxyy-tab-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  text-align: left;
  outline: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.xxyy-tab-btn-text {
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(20px, 1.5625vw, 60px);
  line-height: clamp(32px, 3.073vw, 118px);
  letter-spacing: 0.06em;
  color: #888888;
  transition: color 0.3s ease, font-weight 0.3s ease;
  white-space: nowrap;
}

.xxyy-tab-btn:hover .xxyy-tab-btn-text {
  color: #0F00FF;
}

.xxyy-tab-btn.is-active .xxyy-tab-btn-text {
  color: #0F00FF;
  font-weight: 700;
}

/* 箭头：上下垂直对齐，且选中后依然保持黑色不是蓝色，且无横向位移 */
.xxyy-tab-btn-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #111111 !important;
  opacity: 1 !important;
  width: clamp(32px, 2.37vw, 91px);
  height: auto;
  flex-shrink: 0;
  transform: none !important;
  transition: none !important;
}

.xxyy-tab-btn-arrow svg {
  width: 100%;
  height: auto;
  display: block;
  stroke: #111111 !important;
}

.xxyy-tab-btn:hover .xxyy-tab-btn-arrow,
.xxyy-tab-btn.is-active .xxyy-tab-btn-arrow {
  color: #111111 !important;
  transform: none !important;
}

.xxyy-tab-btn:hover .xxyy-tab-btn-arrow svg,
.xxyy-tab-btn.is-active .xxyy-tab-btn-arrow svg {
  stroke: #111111 !important;
}

/* 右侧列: 产品卡片与参数规格 (采用 CSS Grid 重叠网格轨道锁定总高度，杜绝切换 Tab 导致底部抖动) */
.xxyy-products-right-col {
  width: clamp(320px, 37.86vw, 1454px);
  flex-shrink: 0;
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 100%;
  grid-template-rows: auto;
}

.xxyy-tab-pane {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.35s ease;
}

.xxyy-tab-pane.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.xxyy-product-card-wrap {
  width: 100%;
  aspect-ratio: 1454 / 1283;
  border-radius: clamp(16px, 1.3vw, 48px);
  overflow: hidden;
  box-shadow: 0 clamp(8px, 1vw, 36px) clamp(24px, 2.5vw, 80px) rgba(0, 0, 0, 0.08);
  background: #f8f9fc;
}

.xxyy-product-picture,
.xxyy-product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 双列性能指标参数说明 (Tab 1): 左侧保留空白空间，设定最小高度标准基准 */
.xxyy-tab-specs-grid {
  margin-top: clamp(20px, 2.1vw, 80px);
  padding-left: clamp(20px, 4.2vw, 160px);
  min-height: clamp(110px, 8.2vw, 316px);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(16px, 2.2vw, 84px);
}

.xxyy-tab-specs-col {
  display: flex;
  flex-direction: column;
  gap: clamp(6px, 0.6vw, 24px);
}

.xxyy-tab-spec-item {
  margin: 0;
  padding: 0;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(13px, 0.885vw, 34px);
  line-height: clamp(22px, 1.589vw, 61px);
  letter-spacing: 0.05em;
  color: #000000;
  white-space: nowrap;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 应用领域说明文字 (Tab 2): 左侧保留空白空间，锁定与 Tab 1 规格表相同的高度基准，彻底消除高度差导致的底部移动 */
.xxyy-tab-desc-list {
  margin-top: clamp(20px, 2.1vw, 80px);
  padding-left: clamp(20px, 4.2vw, 160px);
  min-height: clamp(110px, 8.2vw, 316px);
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 0.8vw, 30px);
}

.xxyy-tab-desc-item {
  margin: 0;
  padding: 0;
  font-family: 'OPPOSans', sans-serif;
  font-style: normal;
  font-weight: 300;
  font-size: clamp(13px, 0.885vw, 34px);
  line-height: clamp(22px, 1.589vw, 61px);
  letter-spacing: 0.05em;
  color: #000000;
  white-space: nowrap;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   响应式断点策略
   ========================================================================== */

/* 1. 宽屏台式机/笔记本 (1200px - 1600px) */
@media (max-width: 1600px) {
  .xxyy-banner-desc-box {
    width: 32vw;
  }
  .xxyy-satellite-desc-box {
    width: 28vw;
  }
  .xxyy-green-desc-box {
    width: 28vw;
  }
}

/* 2. 平板横屏与小笔记本 (992px - 1199px) */
@media (max-width: 1199px) {
  .xxyy-banner-section {
    aspect-ratio: 16 / 10;
    min-height: 600px;
  }
  .xxyy-banner-desc-box {
    left: 48vw;
    top: 5vw;
    width: 44vw;
  }
  .xxyy-banner-title-group {
    left: 8vw;
    top: auto;
    bottom: 8%;
  }

  .xxyy-robot-section {
    aspect-ratio: 16 / 10;
    min-height: 640px;
  }
  .xxyy-robot-title-box {
    left: 6vw;
    top: 4vw;
    width: 44vw;
  }
  .xxyy-robot-desc-box {
    left: 52vw;
    top: 4vw;
    width: 42vw;
  }

  .xxyy-satellite-section {
    aspect-ratio: 16 / 10;
    min-height: 640px;
  }
  .xxyy-satellite-desc-box {
    left: 8vw;
    top: 5vw;
    width: 36vw;
  }
  .xxyy-satellite-title-group {
    left: 56vw;
    top: 16vw;
    width: 40vw;
  }

  .xxyy-green-section {
    aspect-ratio: 16 / 10;
    min-height: 640px;
  }
  .xxyy-green-top-title-box {
    left: 56vw;
    top: 4vw;
    width: 40vw;
  }
  .xxyy-green-desc-box {
    left: 8vw;
    top: 14vw;
    width: 42vw;
  }
  .xxyy-green-bottom-title-box {
    left: 56vw;
    top: auto;
    bottom: 5%;
    width: 42vw;
  }
}

/* 3. 平板竖屏 (768px - 991px) */
@media (max-width: 991px) {
  .xxyy-banner-section {
    aspect-ratio: 4 / 3;
    min-height: 620px;
  }
  .xxyy-banner-bg-img {
    object-position: 60% center;
  }
  .xxyy-banner-content-layer {
    pointer-events: auto;
  }
  .xxyy-banner-desc-box {
    left: 6vw;
    top: 50px;
    width: 60vw;
  }
  .xxyy-banner-desc-text {
    font-size: 15px;
    line-height: 26px;
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 16px 20px;
    border-radius: 12px;
  }
  .xxyy-banner-title-group {
    left: 6vw;
    bottom: 40px;
  }
  .xxyy-banner-sub-tag {
    font-size: 20px;
    line-height: 32px;
  }
  .xxyy-banner-main-title {
    font-size: 32px;
    line-height: 44px;
  }

  .xxyy-robot-section {
    aspect-ratio: auto;
    min-height: 700px;
  }
  .xxyy-robot-bg-img {
    object-position: center bottom;
  }
  .xxyy-robot-content-layer {
    position: relative;
    padding: 50px 24px 30px 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    pointer-events: auto;
  }
  .xxyy-robot-title-box,
  .xxyy-robot-desc-box {
    position: static;
    left: auto;
    top: auto;
    width: 100%;
  }
  .xxyy-robot-en-title {
    font-size: 32px;
    line-height: 40px;
  }
  .xxyy-robot-desc-text {
    font-size: 15px;
    line-height: 26px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 18px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  }
  .xxyy-satellite-section {
    aspect-ratio: auto;
    min-height: 700px;
    height: auto;
    padding-bottom: 30px;
  }
  .xxyy-satellite-bg-img {
    object-position: center bottom;
  }
  .xxyy-satellite-content-layer {
    position: relative;
    padding: 50px 24px 30px 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    pointer-events: auto;
  }
  .xxyy-satellite-desc-box,
  .xxyy-satellite-title-group {
    position: static;
    left: auto;
    top: auto;
    width: 100%;
  }
  .xxyy-satellite-desc-text {
    font-size: 15px;
    line-height: 26px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 18px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  }
  .xxyy-satellite-en-title {
    font-size: 32px;
    line-height: 40px;
  }
  .xxyy-satellite-cn-title {
    font-size: 32px;
    line-height: 40px;
    margin-top: 14px;
  }

  .xxyy-green-section {
    aspect-ratio: auto;
    min-height: 720px;
    height: auto;
    padding-bottom: 30px;
  }
  .xxyy-green-bg-img {
    object-position: center center;
  }
  .xxyy-green-content-layer {
    position: relative;
    padding: 50px 24px 30px 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    pointer-events: auto;
  }
  .xxyy-green-top-title-box,
  .xxyy-green-desc-box,
  .xxyy-green-bottom-title-box {
    position: static;
    left: auto;
    top: auto;
    bottom: auto;
    width: 100%;
  }
  .xxyy-green-cn-title {
    font-size: 32px;
    line-height: 40px;
  }
  .xxyy-green-desc-text {
    font-size: 15px;
    line-height: 26px;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 18px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.15);
  }
  .xxyy-green-en-title {
    font-size: 28px;
    line-height: 38px;
  }
}

/* 4. 手机端 (< 768px) */
@media (max-width: 768px) {
  .xxyy-banner-section {
    aspect-ratio: auto;
    min-height: 660px;
    height: auto;
    padding-bottom: 30px;
  }
  .xxyy-banner-bg-img {
    object-position: 65% bottom;
  }
  .xxyy-banner-content-layer {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding: 70px 20px 30px 20px;
    pointer-events: auto;
  }
  .xxyy-banner-title-group {
    position: static;
    left: auto;
    top: auto;
    width: 100%;
    margin-bottom: 20px;
  }
  .xxyy-banner-sub-tag {
    font-size: 18px;
    line-height: 28px;
    margin-bottom: 4px;
  }
  .xxyy-banner-main-title {
    font-size: 28px;
    line-height: 38px;
    letter-spacing: 0.02em;
  }
  .xxyy-banner-main-title span {
    white-space: normal;
  }
  .xxyy-banner-desc-box {
    position: static;
    left: auto;
    top: auto;
    width: 100%;
    margin-top: 10px;
  }
  .xxyy-banner-desc-text {
    font-size: 14px;
    line-height: 24px;
    letter-spacing: 0.04em;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 16px 18px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 13, 255, 0.05);
  }
  .xxyy-banner-section .xxyy-banner-contact-btn {
    right: 16px !important;
    bottom: 16px !important;
    width: 44px !important;
    height: 44px !important;
  }

  .xxyy-robot-section {
    aspect-ratio: auto;
    min-height: 640px;
    height: auto;
    padding-bottom: 24px;
  }
  .xxyy-robot-bg-img {
    object-position: center bottom;
  }
  .xxyy-robot-content-layer {
    position: relative;
    padding: 50px 20px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    pointer-events: auto;
  }
  .xxyy-robot-title-box,
  .xxyy-robot-desc-box {
    position: static;
    left: auto;
    top: auto;
    width: 100%;
  }
  .xxyy-robot-en-title {
    font-size: 25px;
    line-height: 33px;
  }
  .xxyy-robot-en-title span {
    white-space: normal;
  }
  .xxyy-robot-desc-text {
    font-size: 14px;
    line-height: 23px;
    letter-spacing: 0.03em;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  }
  .xxyy-satellite-section {
    aspect-ratio: auto;
    min-height: 640px;
    height: auto;
    padding-bottom: 24px;
  }
  .xxyy-satellite-bg-img {
    object-position: 70% bottom;
  }
  .xxyy-satellite-content-layer {
    position: relative;
    padding: 50px 20px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    pointer-events: auto;
  }
  .xxyy-satellite-desc-box,
  .xxyy-satellite-title-group {
    position: static;
    left: auto;
    top: auto;
    width: 100%;
  }
  .xxyy-satellite-en-title {
    font-size: 25px;
    line-height: 33px;
  }
  .xxyy-satellite-en-title span,
  .xxyy-satellite-cn-title span {
    white-space: normal;
  }
  .xxyy-satellite-cn-title {
    font-size: 26px;
    line-height: 34px;
    margin-top: 10px;
  }
  .xxyy-satellite-desc-text {
    font-size: 14px;
    line-height: 23px;
    letter-spacing: 0.03em;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  }

  .xxyy-green-section {
    aspect-ratio: auto;
    min-height: 640px;
    height: auto;
    padding-bottom: 24px;
  }
  .xxyy-green-bg-img {
    object-position: 75% center;
  }
  .xxyy-green-content-layer {
    position: relative;
    padding: 50px 20px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    pointer-events: auto;
  }
  .xxyy-green-top-title-box,
  .xxyy-green-desc-box,
  .xxyy-green-bottom-title-box {
    position: static;
    left: auto;
    top: auto;
    bottom: auto;
    width: 100%;
  }
  .xxyy-green-cn-title {
    font-size: 26px;
    line-height: 34px;
  }
  .xxyy-green-cn-title span,
  .xxyy-green-en-title span {
    white-space: normal;
  }
  .xxyy-green-desc-text {
    font-size: 14px;
    line-height: 23px;
    letter-spacing: 0.03em;
    background: rgba(0, 0, 0, 0.48);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
  }
  .xxyy-green-en-title {
    font-size: 24px;
    line-height: 32px;
  }

  /* Section 5: 石墨烯导热散热产品及应用 (移动端/平板单列流式堆叠) */
  .xxyy-products-section {
    padding-top: 50px;
    padding-bottom: 40px;
  }
  .xxyy-products-container {
    flex-direction: column;
    gap: 36px;
    padding-left: 20px;
    padding-right: 20px;
  }
  .xxyy-products-left-col,
  .xxyy-products-right-col {
    width: 100%;
  }
  .xxyy-products-en-title {
    font-size: 26px;
    line-height: 34px;
  }
  .xxyy-products-en-title span,
  .xxyy-products-cn-title span {
    white-space: normal;
  }
  .xxyy-products-cn-title {
    font-size: 28px;
    line-height: 36px;
    margin-top: 16px;
  }
  .xxyy-tab-nav {
    margin-top: 24px;
    gap: 14px;
  }
  .xxyy-tab-btn {
    gap: 20px;
  }
  .xxyy-tab-btn-text {
    font-size: 19px;
    line-height: 30px;
  }
  .xxyy-tab-btn-arrow {
    width: 32px;
  }
  .xxyy-product-card-wrap {
    border-radius: 18px;
  }
  .xxyy-tab-nav {
    width: 100%;
  }
  .xxyy-tab-specs-grid,
  .xxyy-tab-desc-list {
    padding-left: 0;
    min-height: auto;
  }
  .xxyy-tab-specs-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 20px;
  }
  .xxyy-tab-spec-item,
  .xxyy-tab-desc-item {
    font-size: 14px;
    line-height: 24px;
    white-space: normal;
  }
}

/* ==========================================================================
   Section 5 与公共 Footer 雪山底图自然交融 (紧贴“设备导热散热”下方，消除大空隙)
   ========================================================================== */
@media (min-width: 992px) {
  .xxyy-products-section {
    padding-bottom: 0 !important;
  }
  .xxyy-page-container + .aika-footer {
    margin-top: -6.5vw !important;
    position: relative !important;
    z-index: 1 !important;
  }
}

@media (max-width: 991px) {
  .xxyy-page-container + .aika-footer {
    margin-top: 0 !important;
  }
}