html { font-size: 62.5%; scroll-behavior: smooth; }

/* ===== 滚动缩放淡入动效 ===== */
.fade-in {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* ===== Reset ===== */
* {
  margin: 0;
  padding: 0;
}

.main-content section {
  box-sizing: border-box;
  scroll-margin-top: 12rem;
}

html, body {
  width: 100%;
  min-height: 100vh;
}

body {
  background: #ffffff;
  font-family: "Noto Sans SC", "Source Han Sans SC", "思源黑体", -apple-system, BlinkMacSystemFont, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ===== Hero 顶部区域 ===== */
.hero {
  position: relative;
  width: 100vw;
  aspect-ratio: 16 / 9;
  background-color: #ffffff;
  flex-shrink: 0;
}

/* ===== Banner 轮播 ===== */
.banner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.banner-desktop {
  display: block;
}

.banner-mobile {
  display: none;
}

.banner-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.banner-slide.active {
  opacity: 1;
}

.banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 4.8rem;
  height: 4.8rem;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background-color 0.3s ease;
}

.banner-arrow:hover {
  background-color: rgba(255, 255, 255, 0.5);
}

.banner-arrow.prev { left: 2rem; }
.banner-arrow.next { right: 2rem; }

.banner-arrow svg {
  width: 2rem;
  height: 2rem;
  stroke: #ffffff;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.banner-dots {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 1rem;
  z-index: 10;
}

.banner-dot {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s ease;
}

.banner-dot.active {
  width: 2.8rem;
  border-radius: 0.5rem;
  background-color: #ffffff;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 147.7rem;
  height: 10.6rem;
  background-color: #ffffff;
  border-radius: 5.3rem;
  box-shadow: 0 0.4rem 2.4rem rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 3rem;
  z-index: 1000;
  max-width: calc(100vw - 10rem);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 100%;
}

.logo {
  width: 12.8rem;
  height: auto;
  flex-shrink: 0;
  display: block;
  margin-left: 19.8rem;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  margin-right: 19.6rem;
}

.nav-menu li + li {
  margin-left: 3rem;
}

.nav-menu a {
  font-family: "Noto Sans SC", "Source Han Sans SC", "思源黑体", sans-serif;
  font-weight: 400;
  font-size: 2.3rem;
  color: #1f1f1f;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s ease;
  position: relative;
  padding-bottom: 0.4rem;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 0.2rem;
  background-color: #ff5c01;
  transition: width 0.3s ease;
}

.nav-menu a:hover {
  color: #ff5c01;
}

.nav-menu a:hover::after {
  width: 100%;
}

/* ===== 我能做什么 ===== */
.about-section {
  position: relative;
  width: 100vw;
  height: 168.69rem;
  background-image: url("../images/bg/GW-(1).png");
  background-size: 100% 100%;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  margin: 0;
  padding: 21.8rem 0 0;
  display: flex;
  justify-content: center;
  box-sizing: border-box;
}

.about-content {
  width: 108rem;
  text-align: center;
  padding-top: 0;
}

.about-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 8.8rem;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  color: #ff5c01;
  text-align: center;
  margin: 0;
  line-height: 1.2;
}

.about-text-1 {
  margin-top: 5.2rem;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 3.2rem;
  font-weight: 400;
  font-variation-settings: "wght" 400, "Round" 100;
  color: #ffffff;
  text-align: center;
  line-height: 8rem;
}

.about-text-1 p {
  margin: 0;
}

.about-image {
  display: block;
  margin: 2rem auto 0;
  max-width: 100%;
  height: auto;
}

.about-text-2 {
  margin-top: 4rem;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 3.2rem;
  font-weight: 400;
  font-variation-settings: "wght" 400, "Round" 100;
  color: #ffffff;
  text-align: center;
  line-height: 8rem;
}

.about-text-2 p {
  margin: 0;
}

/* ===== 核心能力 ===== */
.core-section {
  position: relative;
  width: 100vw;
  height: 147.34rem;
  background-image: url("../images/bg/GW-(2).png");
  background-size: 100% 100%;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  margin: 0;
  padding: 1.8rem 0 0;
  display: flex;
  justify-content: center;
  box-sizing: border-box;
}

.core-content {
  width: 108rem;
  text-align: center;
}

.core-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 8.8rem;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  color: #ff5c01;
  text-align: center;
  margin: 0;
  line-height: 1.2;
}

.core-decor,
.advantage-decor,
.case-decor {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 3rem;
  gap: 0.4rem;
}

.decor-line {
  display: inline-block;
  height: 0.4rem;
  border-radius: 0.2rem;
  background-color: #ff5c01;
}

.decor-line-1 {
  width: 7.4rem;
}

.decor-line-2 {
  width: 1.4rem;
}

.core-text {
  margin-top: 2.8rem;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 4rem;
  font-weight: 500;
  font-variation-settings: "wght" 500, "Round" 100;
  color: #4a4a4b;
  text-align: center;
  line-height: 5.2rem;
}

.core-text p {
  margin: 0;
}

/* ===== 核心能力卡片 ===== */
.core-cards-wrapper {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 1rem;
  margin-top: 7.2rem;
  max-width: 108rem;
  margin-left: auto;
  margin-right: auto;
}

/* 核心能力板块：单列布局，一行一个 */
.core-section .core-cards-wrapper {
  flex-direction: column;
  align-items: center;
}

.core-section .core-card-item {
  width: 85%;
  max-width: 90rem;
}

.core-section .core-cards-wrapper-second {
  margin-top: 1rem;
}

.core-cards-wrapper-second {
  margin-top: 8rem;
}

.core-card-item {
  position: relative;
  width: 50rem;
  max-width: 48%;
  min-height: 22rem;
  background-color: #2c2c2e;
  border-radius: 2.4rem;
  box-shadow: 0 1.2rem 2.4rem rgba(0, 0, 0, 0.15);
  transform: rotate3d(1, 1, 0, 4deg) skewX(-8deg);
  padding: 3rem 2.8rem;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.4s ease;
  cursor: pointer;
}

.core-card-item:hover {
  transform: rotate3d(1, 1, 0, 4deg) skewX(-8deg) translateY(-0.8rem) scale(1.03);
  box-shadow: 0 2rem 4rem rgba(0, 0, 0, 0.25);
}

.core-card-right {
  margin-top: 0.6rem;
}

.card-content {
  transform: skewX(8deg);
  text-align: center;
}

.card-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 4rem;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  color: #ff5c01;
  margin: 0 0 0.6rem;
  line-height: 1.2;
}

.card-desc {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 2.4rem;
  font-weight: 400;
  font-variation-settings: "wght" 400, "Round" 100;
  color: #ffffff;
  margin: 0;
  line-height: 4.6rem;
  text-align: center;
}

/* ===== 竞争优势 ===== */
#advantage{
  margin-top: -2px;
}

.advantage-section {
  position: relative;
  width: 100vw;
  height: 131.87rem;
  background-image: url("../images/bg/GW-(3).png");
  background-size: 100% 100%;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  margin: 0;
  padding: 11.8rem 0 0;
  display: flex;
  justify-content: center;
  box-sizing: border-box;
}

.advantage-content {
  width: 108rem;
  text-align: center;
}

.advantage-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 8.8rem;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  color: #ff5c01;
  text-align: center;
  margin: 0;
  line-height: 1.2;
}

.advantage-text {
  margin-top: 1.8rem;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 4rem;
  font-weight: 500;
  font-variation-settings: "wght" 500, "Round" 100;
  color: #f2f2f2;
  text-align: center;
  line-height: 5.2rem;
}

.advantage-text p {
  margin: 0;
}

/* 竞争优势卡片样式覆盖 */
.advantage-section .core-card-item {
  background-color: #e7e7e7;
}

.advantage-section .card-desc {
  color: #0d0d0d;
  line-height: 4rem;
}

/* ===== 参考案例 ===== */
.case-section {
  position: relative;
  width: 100vw;
  background-image: url("../images/bg/GW-(4).png");
  background-size: 100% 100%;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  margin: 0;
  padding: 9.8rem 0 6rem;
  display: flex;
  justify-content: center;
  box-sizing: border-box;
}

.case-content {
  width: 108rem;
  text-align: center;
}

.case-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 8.8rem;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  color: #ff5c01;
  text-align: center;
  margin: 0;
  line-height: 1.2;
}

.case-text {
  margin-top: 2.8rem;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 4rem;
  font-weight: 500;
  font-variation-settings: "wght" 500, "Round" 100;
  color: #4a4a4b;
  text-align: center;
  line-height: 5.2rem;
}

.case-text p {
  margin: 0;
}

/* ===== 参考案例卡片 ===== */
.case-cards-wrapper {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 10.2rem;
  margin-top: 10.2rem;
}

.case-cards-wrapper-second {
  margin-top: 8.8rem;
}

.case-card {
  position: relative;
  width: 42rem;
  height: 42rem;
  border-radius: 2.4rem;
  border: 0.2rem solid #ffffff;
  box-shadow: 0 1.2rem 2.4rem rgba(0, 0, 0, 0.15);
  box-sizing: border-box;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.4s ease;
  cursor: pointer;
  overflow: visible;
}

.case-card:hover {
  transform: translateY(-1rem) scale(1.03);
  box-shadow: 0 2.4rem 4.8rem rgba(0, 0, 0, 0.3);
}

.case-card:hover .case-card-image img {
  transform: scale(1.1);
}

.case-card-image {
  width: 100%;
  height: 100%;
  border-radius: 2.2rem;
  overflow: hidden;
}

.case-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

.case-shape {
  position: absolute;
  bottom: -0.6rem;
  left: 50%;
  transform: translateX(-50%);
  width: 44rem;
  height: 22rem;
  background-image: url("../images/im/shape2.png");
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 2;
  pointer-events: none;
}

.case-shape-text {
  position: absolute;
  bottom: 2.8rem;
  left: 50%;
  transform: translateX(-50%);
  color: #c0bfbf;
  font-size: 3.8rem;
  text-align: center;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-weight: 400;
  font-variation-settings: "wght" 400, "Round" 100;
  height: 2.6rem;
  line-height: 2.6rem;
  white-space: nowrap;
  z-index: 3;
}

.case-shape-category {
  position: absolute;
  bottom: 7.4rem;
  left: 50%;
  transform: translateX(-50%);
  color: #ff5c01;
  font-size: 4.2rem;
  text-align: center;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  white-space: nowrap;
  z-index: 3;
}

/* ===== 案例详情弹窗 ===== */
.case-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.case-modal.active {
  display: block;
  opacity: 1;
}

.case-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.case-modal.active .case-modal-overlay {
  opacity: 1;
}

.case-modal-content {
  position: relative;
  width: 90%;
  max-width: 120rem;
  height: 85vh;
  margin: 5vh auto;
  background-color: #ffffff;
  border-radius: 1.6rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.9) translateY(2rem);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              opacity 0.3s ease;
}

.case-modal.active .case-modal-content {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.case-modal-close {
  position: absolute;
  top: 1.6rem;
  right: 1.6rem;
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.5);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.case-modal-close:hover {
  background-color: rgba(0, 0, 0, 0.8);
  transform: rotate(90deg) scale(1.1);
}

.case-modal-close:active {
  transform: rotate(90deg) scale(0.95);
}

.case-modal-header {
  padding: 2.4rem 3.2rem;
  border-bottom: 0.1rem solid #eee;
  flex-shrink: 0;
  transform: translateY(-2rem);
  opacity: 0;
  transition: transform 0.4s ease 0.15s, opacity 0.4s ease 0.15s;
  text-align: center;
}

.case-modal.active .case-modal-header {
  transform: translateY(0);
  opacity: 1;
}

.case-modal-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 3.2rem;
  font-weight: 700;
  color: #ff5c01;
  margin: 0;
  text-align: center;
}

.case-modal-body {
  flex: 1;
  overflow: hidden;
  padding: 2.4rem;
  opacity: 0;
  transition: opacity 0.4s ease 0.25s;
  display: flex;
  flex-direction: column;
}

.case-modal.active .case-modal-body {
  opacity: 1;
}

/* 轮播主图区域 */
.case-carousel-wrapper {
  position: relative;
  width: 100%;
  flex: 1;
}

.case-carousel {
  width: 100%;
  min-height: 40rem;
  max-height: 65vh;
  background-color: #f5f5f5;
  border-radius: 1.2rem;
  overflow-y: auto;
  overflow-x: hidden;
}

.case-carousel-slides {
  position: relative;
  width: 100%;
  min-height: 40rem;
}

.case-carousel-slide {
  position: relative;
  width: 100%;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 1.6rem;
}

.case-carousel-slide.active {
  display: flex;
}

.case-carousel-slide img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: contain;
}

.case-carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 4.4rem;
  height: 4.4rem;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.4);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  transition: background-color 0.3s ease;
}

.case-carousel-arrow:hover {
  background-color: rgba(0, 0, 0, 0.7);
}

.case-carousel-arrow.prev { left: 1.6rem; }
.case-carousel-arrow.next { right: 1.6rem; }

.case-carousel-arrow svg {
  width: 2rem;
  height: 2rem;
  stroke: #ffffff;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 缩略图导航 */
.case-thumbs-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: 1.6rem;
  flex-shrink: 0;
}

.case-thumbs {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem;
  background-color: #f0f0f0;
  border-radius: 0.8rem;
  min-height: 12rem;
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.case-thumbs::-webkit-scrollbar {
  display: none;
}

.case-thumbs-arrow {
  width: 3.6rem;
  height: 3.6rem;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.4);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 5;
  transition: background-color 0.3s ease;
}

.case-thumbs-arrow:hover {
  background-color: rgba(0, 0, 0, 0.7);
}

.case-thumbs-arrow.prev {
  margin-right: 0.8rem;
}

.case-thumbs-arrow.next {
  margin-left: 0.8rem;
}

.case-thumbs-arrow svg {
  width: 1.6rem;
  height: 1.6rem;
  stroke: #ffffff;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.case-thumb {
  flex: 0 0 auto;
  width: calc((100% - 4rem) / 5);
  aspect-ratio: 1 / 1;
  border-radius: 0.6rem;
  overflow: hidden;
  cursor: pointer;
  border: 0.2rem solid transparent;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.case-thumb:hover {
  transform: scale(1.05);
}

.case-thumb.active {
  border-color: #ff5c01;
}

.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== 大图查看器 ===== */
.image-viewer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 3000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.image-viewer.active {
  display: block;
  opacity: 1;
}

.image-viewer-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
}

.image-viewer-content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem;
  box-sizing: border-box;
}

.image-viewer-img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  transform: scale(0.9);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              opacity 0.3s ease;
}

.image-viewer.active .image-viewer-img {
  transform: scale(1);
  opacity: 1;
}

.image-viewer-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 4.8rem;
  height: 4.8rem;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.15);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.image-viewer-close:hover {
  background-color: rgba(255, 255, 255, 0.3);
  transform: rotate(90deg) scale(1.1);
}

.image-viewer-close:active {
  transform: rotate(90deg) scale(0.95);
}

/* ===== 移动端抽屉导航 ===== */
.nav-hamburger {
  display: none;
  position: fixed;
  top: 2rem;
  left: 2rem;
  width: 6.4rem;
  height: 6.4rem;
  background-color: #ffffff;
  border: none;
  border-radius: 1rem;
  cursor: pointer;
  z-index: 2001;
  box-shadow: 0 0.2rem 1rem rgba(0, 0, 0, 0.1);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0;
}

.nav-hamburger span {
  display: block;
  width: 2.2rem;
  height: 0.25rem;
  background-color: #1f1f1f;
  border-radius: 0.2rem;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-hamburger.active span:nth-child(1) {
  transform: translateY(0.75rem) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-0.75rem) rotate(-45deg);
}

.nav-hamburger.hidden {
  display: none !important;
}

.drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.drawer-overlay.active {
  display: block;
  opacity: 1;
}

.drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 28rem;
  height: 100vh;
  background-color: #ffffff;
  z-index: 2002;
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 8rem 3rem 3rem;
  box-sizing: border-box;
  box-shadow: 0.4rem 0 2.4rem rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
}

.drawer.open {
  transform: translateX(0);
}

.drawer-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 3.6rem;
  height: 3.6rem;
  border: none;
  background: none;
  cursor: pointer;
  color: #1f1f1f;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.drawer-close:hover {
  color: #ff5c01;
}

.drawer-logo {
  width: 12rem;
  height: auto;
  object-fit: contain;
  padding-bottom: 2.4rem;
  border-bottom: 0.1rem solid #eee;
  margin-bottom: 2rem;
}

.drawer-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.drawer-menu li + li {
  margin-top: 0.4rem;
}

.drawer-menu a {
  display: block;
  padding: 1.4rem 1.6rem;
  font-family: "Noto Sans SC", "Source Han Sans SC", sans-serif;
  font-size: 3rem;
  font-weight: 500;
  color: #1f1f1f;
  text-decoration: none;
  border-radius: 0.8rem;
  transition: background-color 0.2s, color 0.2s;
}

.drawer-menu a:hover {
  background-color: #fff5f0;
  color: #ff5c01;
}

.drawer-menu a.active {
  color: #ff5c01;
  font-weight: 700;
}


/* ===== 联系我们 ===== */
.contact-section {
  position: relative;
  width: 100vw;
  min-height: 120rem;
  background-image: url("../images/bg/GW-(5).png");
  background-size: 100% 100%;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  margin: 0;
  padding: 1.8rem 0 6rem;
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
}

.contact-box {
  width: 108rem;
  height: 70rem;
  background-color: #ff5c01;
  border-radius: 2.4rem;
  box-shadow: 0 0.4rem 2.4rem rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.4s ease;
  cursor: pointer;
  margin-top: -10rem;
}

.contact-box:hover {
  transform: translateY(-0.8rem) scale(1.02);
  box-shadow: 0 1.6rem 3.2rem rgba(0, 0, 0, 0.2);
}

.contact-content {
  width: 100%;
  text-align: center;
  padding: 4rem;
}

.contact-title {
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 8.8rem;
  font-weight: 700;
  font-variation-settings: "wght" 700, "Round" 100;
  color: #ffffff;
  text-align: center;
  margin: 0;
  line-height: 1.2;
}

.contact-decor {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 3rem;
  gap: 0.4rem;
}

.contact-decor .decor-line {
  background-color: #ffffff;
}

.contact-text {
  margin-top: 2.8rem;
  font-family: "Alimama FangYuanTi VF", "Noto Sans SC", sans-serif;
  font-size: 4rem;
  font-weight: 500;
  font-variation-settings: "wght" 500, "Round" 100;
  color: #ffffff;
  text-align: center;
  line-height: 5.2rem;
}

.contact-text p {
  margin: 0;
}

.contact-rect {
  width: 29.4rem;
  height: 29.4rem;
  object-fit: contain;
  border-radius: 2rem;
  margin: 6rem auto 0;
  display: block;
  background-color: #ffffff;
  padding: 1rem;
  box-sizing: border-box;
}

.contact-qr-text {
  font-family: "Noto Sans SC", "Source Han Sans SC", "思源黑体", sans-serif;
  font-size: 2.4rem;
  font-weight: 400;
  color: #ffffff;
  text-align: center;
  margin: 2rem 0 0;
  line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
  width: 100vw;
  background-color: #353635;
  padding: 4rem 2rem;
  box-sizing: border-box;
}

.footer-content {
  width: 108rem;
  max-width: 100%;
  margin: 0 auto;
  text-align: center;
}

.footer-copyright {
  font-family: "Noto Sans SC", "Source Han Sans SC", "思源黑体", sans-serif;
  font-size: 2rem;
  font-weight: 400;
  color: #ffffff;
  margin: 0 0 1.2rem;
  line-height: 1.6;
}

.footer-business {
  font-family: "Noto Sans SC", "Source Han Sans SC", "思源黑体", sans-serif;
  font-size: 1.8rem;
  font-weight: 400;
  color: #cccccc;
  margin: 0;
  line-height: 1.6;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 4rem;
  right: 4rem;
  width: 5.6rem;
  height: 5.6rem;
  border-radius: 50%;
  background-color: #ff5c01;
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0.4rem 1.6rem rgba(255, 92, 1, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(2rem);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease,
              background-color 0.3s ease, box-shadow 0.3s ease;
  z-index: 9999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: #e65100;
  box-shadow: 0 0.6rem 2rem rgba(255, 92, 1, 0.5);
  transform: translateY(-0.3rem);
}

.back-to-top svg {
  display: block;
}

/* ===== 桌面端响应式缩放（避免横向滚动） ===== */
@media (max-width: 1477px) {
  html { font-size: 58%; }
}

@media (max-width: 1280px) {
  html { font-size: 50%; }
}

@media (max-width: 1024px) {
  html { font-size: 42%; }
}

/* 内容容器最大宽度限制 */
.about-content,
.core-content,
.advantage-content,
.case-content,
.contact-content {
  max-width: 100%;
  padding: 0 2.2rem;
  box-sizing: border-box;
}

/* ===== 响应式布局 ===== */
@media (max-width: 768px) {
  html {
    font-size: 45%;
  }

  /* 导航栏 */
  .nav-hamburger {
    display: flex;
  }

  .navbar {
    display: none !important;
  }

  /* Hero / Banner */
  .hero {
    height: auto !important;
    padding-top: 7rem;
  }

  .banner-desktop {
    display: none !important;
  }

  .banner-mobile {
    display: block !important;
    position: relative !important;
    width: 100% !important;
    height: auto !important;
    aspect-ratio: 9 / 16;
    max-height: 80vh;
  }

  /* 下方内容样式不变，仅通过 font-size 等比例缩放 */

  /* 移动端竞争优势卡片按文案自适应高度 */
  .advantage-section .core-card-item {
    height: auto;
    min-height: auto;
    align-items: flex-start;
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .advantage-section .card-content {
    transform: skewX(8deg);
    text-align: center;
    width: 100%;
    height: 15rem;
  }

  /* 移动端竞争优势第二组卡片上移20px */
  .advantage-section .core-cards-wrapper-second {
    margin-top: 5rem;
  }

  /* 移动端竞争优势标题缩小 */
  .advantage-section .card-title {
    font-size: 4rem;
  }

  /* 移动端竞争优势文案2行展示 */
  .advantage-section .card-desc {
    /* display: -webkit-box; */
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
  }

  /* 移动端竞争优势整体上移60px */
  .advantage-section {
    padding-top: 3.8rem;
  }

  /* 移动端竞争优势副标题缩小 */
  .advantage-section .advantage-text {
    font-size: 3rem;
    line-height: 1.6;
  }

  /* 移动端竞争优势卡片单列单行展示 */
  .advantage-section .core-cards-wrapper {
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    margin-top: 2.2rem;
  }

  .advantage-section .core-card-item {
    width: 85%;
    max-width: 80rem;
  }

  .advantage-section .core-cards-wrapper-second {
    margin-top: 2rem;
  }

  /* 移动端背景图替换为 app/bg */
  .about-section,
  .core-section,
  .advantage-section,
  .case-section,
  .contact-section {
    background-size: 100% 100% !important;
    background-repeat: no-repeat !important;
    background-position: top center !important;
    height: auto !important;
    min-height: auto !important;
  }

  /* 移动端内容相对于背景上下各留50px */
  .about-content,
  .core-content,
  .advantage-content,
  .case-content,
  .contact-box {
    margin-top: 0 !important;
    padding-top: 50px !important;
    padding-bottom: 50px !important;
  }

  /* 移动端我们能做什么向上移动100px */
  .about-content {
    margin-top: -100px !important;
  }

  /* 移动端我们能做什么行间距缩小 */
  .about-text-1,
  .about-text-2 {
    line-height: 6rem !important;
  }

  /* 移动端核心能力整体上移 */
  .core-content {
    padding-top: 30px !important;
  }

  .about-section {
    background-image: url("../images/app/bg/GW_02.png") !important;
  }

  .core-section {
    background-image: url("../images/app/bg/GW_03.png") !important;
  }

  .advantage-section {
    background-image: url("../images/app/bg/GW_04.png") !important;
  }

  .case-section {
    background-image: url("../images/app/bg/GW_05.png") !important;
  }

  .contact-section {
    background-image: url("../images/app/bg/GW_06.png") !important;
    background-size: 100% auto !important;
  }

  /* 移动端参考案例严格按PC端比例统一缩放 */
  .case-card,
  .case-shape,
  .case-shape-text,
  .case-shape-category,
  .case-card-image,
  .case-card-image img {
    /* 全部使用rem单位，随html font-size统一等比例缩放 */
  }

  /* 移动端参考案例底部黑色矩形宽度 */
  .case-shape {
    width: 195px;
  }

  /* 移动端参考案例白色卡片正方形 */
  .case-card {
    width: 400px;
    height: 200px;
  }

  /* 移动端内容区域间距
  .main-content section {
    padding: 0 1rem;
  } */

  /* 移动端案例卡片间距 */
  .case-cards-wrapper {
    gap: 3.2rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 35%;
  }

  .drawer {
    width: 80vw !important;
  }
}