body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: #111;
  background: #fff;
  margin: 0;
  padding: 0;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0px 4vw 0px 2vw;
  margin-top: 12px;
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1140px;
  height: 68px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  box-shadow: 0 2px 16px 0 rgba(0, 0, 0, 0.04);
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.logo {
  font-weight: bold;
  font-size: 1.2em;
  color: #ffffff;
  text-decoration: none;
  transition: color 0.2s;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.25), 0 1px 0 #222;
}
#logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo:hover {
  color: #111;
  text-decoration: none;
}
nav a,
nav button {
  display: inline-block;
  margin-left: 24px;
  text-decoration: none;
  color: #ffffff;
  background: none;
  border: none;
  font-size: 1em;
  cursor: pointer;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.25), 0 1px 0 #222;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.18s;
}
nav a:hover,
nav button:hover {
  color: #00c3ff !important;
  text-decoration: underline;
  transform: scale(1.08);
  box-shadow: 0 2px 8px 0 rgba(0, 195, 255, 0.08);
  background: rgba(0, 195, 255, 0.06);
}
main {
  margin: 0 auto;
}

h2 {
  font-size: 3em;
  font-weight: 500;
  color: #222;
}
.hero {
  text-align: center;
  margin: 0px 0 40px 0;
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.hero-bg-video {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}
.hero-bg-mask {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
  pointer-events: none;
}
.hero > *:not(.hero-bg-video):not(.hero-bg-mask) {
  position: relative;
  z-index: 2;
}
.hero h1,
.hero p {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 {
  font-size: 6em;
  margin-bottom: 10px;
  color: #fff;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.25), 0 1px 0 #222;
  line-height: 1;
}
.hero p {
  color: #ccc;
  margin-bottom: 24px;
  font-size: 1.1em;
}

.hero-button {
  position: relative;
  overflow: hidden;
  margin: 0 8px;
  padding: 10px 24px;
  min-width: 120px;
  height: 40px;
  border: none;
  border-radius: 3px;
  background: #fff;
  cursor: pointer;
  display: inline-block;
  font-size: 1em;
  font-weight: bold;
  color: #111;
}

.hero-button:hover {
  background: #111;
  transform: scale(1.07);
  color: #ffffff;
}

hr {
  margin: 40px 0;
  border: none;
  border-top: 1px solid #eee;
}
.overview {
  max-width: 100vw;
  margin: 0 auto;
  padding: 100px 60px;
  position: relative;
}
.overview .center {
  text-align: center;
}
.overview::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0vw;
  right: 0vw;
  height: 1px;
  background-color: #eee;
}
.overview-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.1em;
}
.overview-text {
  width: 50%;
  font-size: 1em;
  color: #444;
}
.overview-graphic {
  width: 40%;
  display: flex;
  justify-content: center;
}
.circle {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: #e0e0e0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 1.1em;
  color: #222;
  gap: 16px;
}
.overview-desc {
  color: #bbb;
  font-size: 4em;
  font-weight: 500;
}
.overview-desc span {
  color: #bbb;
  transition: color 0.3s;
  display: inline-block;
}
.overview-desc span.active {
  color: #222;
}
.overview-desc span.active.blue {
  color: #00c3ff;
}
.services .service-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.service-item {
  display: grid;
  grid-template-columns: 1.2fr 1fr 2fr;
  align-items: start;
  gap: 32px;
  min-height: 180px;
  padding: 32px 0;

  position: relative;
  background: transparent;
  z-index: 1;
}
.service-item::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 100vw;
  height: 100%;
  background: #eee;
  z-index: 0;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.01s;
  pointer-events: none;
}
.service-item:hover::before {
  opacity: 1;
}
.service-item > * {
  position: relative;
  z-index: 1;
}
.service-item:hover {
  background: #eee;
}

.service-img {
  position: relative;
  width: 260px;
  height: 160px;
  overflow: hidden;
  background: #d6d6d6;
}
.service-img img,
.service-img video {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.2s;
  display: block;
}
.service-img img.img-static {
  z-index: 1;
  opacity: 1;
}
.service-img video.img-hover {
  z-index: 2;
  opacity: 0;
  pointer-events: none;
}

.service-item:hover .service-img .img-static {
  opacity: 0;
}
.service-item:hover .service-img .img-hover {
  opacity: 1;
  pointer-events: auto;
}

.service-item h3 {
  font-size: 3.4em;
  font-weight: 400;
  margin: 0 0 12px 0;
  line-height: 1.1;
  transition: transform 0.3s;
}
.service-item:hover h3 {
  transform: translateX(24px);
}
.service-item p {
  font-size: 1.1em;
  color: #222;
  margin: 0;
  line-height: 1.1;
}
.tag {
  font-size: 1.1em;
  color: #999;
  margin-top: 48px;
}

.tech-list {
  width: 1140px;
  max-width: 100vw;
  overflow: hidden;
  box-sizing: border-box;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
}
.tech-list-inner {
  display: flex;
  gap: 24px;
  animation: tech-scroll 80s linear infinite;
  will-change: transform;
  width: max-content;
}
@keyframes tech-scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}
.tech-list:hover .tech-list-inner {
  animation-play-state: paused;
}
.tech-card {
  position: relative;
  aspect-ratio: 267 / 315;
  height: auto;
  padding: 24px 24px 0px 24px;
  background: none;
  overflow: hidden;
  z-index: 1;
  width: 180px;
  min-width: 180px;
  max-width: 180px;
  flex: 0 0 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.tech-bg {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  object-fit: cover;
}
.tech-card h3 {
  font-size: 1.2em;
  font-weight: 500;
  margin: 0;
  z-index: 1;
  color: #111 !important;
}

.tech-card p {
  position: relative;
  z-index: 1;
  color: #444;
}

.tech-card .tech-bg {
  /* 移除或覆盖 SVG 的红色描边 */
  /* 如果 SVG 是外链图片，需将 SVG 文件中的 stroke="red" 或 stroke="#e53935" 去掉或改为 stroke="none" */
  /* 如果是 CSS 控制，确保没有 border 或 box-shadow 为红色 */
}

.tech-card:hover .tech-bg {
  filter: brightness(0) saturate(100%) invert(13%) sepia(8%) saturate(0%)
    hue-rotate(180deg) brightness(90%) contrast(100%);
}
.tech-card:hover h3,
.tech-card:hover p {
  color: #fff !important;
}

.goal-list {
  display: flex;
  gap: 24px;
  margin-top: 16px;
}

.goal-item {
  background: #222;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 200px;
  padding: 24px;
  transition: background 0.4s, color 0.8s;
}
.goal-item::before {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  background: #eee;
  z-index: 0;
  transition: width 1.2s cubic-bezier(0.4, 1.5, 0.5, 1);
  pointer-events: none;
}
.goal-item.goal-animate-in::before,
.goal-item.animated::before {
  width: 0%;
}
.goal-item:hover {
  z-index: 1;
}
.goal-item:hover::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  pointer-events: none;
}
.goal-item .goal-title,
.goal-item .goal-desc {
  position: relative;
  z-index: 3;
}
.goal-item.goal-animate-in .goal-title {
  color: #fff;
}
.goal-item.goal-animate-in .goal-desc {
  color: #bbb;
}

.goal-item:hover .goal-title {
  color: #00c3ff;
  letter-spacing: 3px;
  transition: color 0.3s, letter-spacing 0.3s;
}
.goal-item:hover .goal-desc {
  color: #fff;
  opacity: 1;
  transition: color 0.3s, opacity 0.3s;
}
.goal-item:hover {
  transform: translateY(-12px) scale(1.04) rotate(-1deg);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.18);
  background: linear-gradient(100deg, #222 80%, #00c3ff 100%) !important;
  z-index: 100;
}

.goal-title {
  font-size: 2em;
  margin-bottom: 0;
}

.contact-content {
  display: flex;
  gap: 32px;
  margin-top: 16px;
}
.contact-info {
  flex: 1;
  font-size: 1em;
  color: #444;
}
.contact-info p {
  font-size: 1.2em;
  color: #444;
}
.contact-form {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #eee;
  padding: 24px;
  border-radius: 3px;
}
.contact-form input,
.contact-form textarea {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 3px;
  font-size: 1em;
}
.contact-form button {
  background: #111;
  color: #fff;
  border: none;
  padding: 12px;
  border-radius: 4px;
  font-size: 1em;
  cursor: pointer;
  transition: transform 0.18s cubic-bezier(0.4, 1.5, 0.5, 1),
    box-shadow 0.18s cubic-bezier(0.4, 1.5, 0.5, 1), background 0.18s;
  box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.06);
}
.contact-form button:hover {
  transform: scale(1.07);
  box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.12);
  background: #222;
}
@media (max-width: 900px) {
  .overview-content,
  .contact-content,
  .core-tech .tech-list,
  .goals .goal-list {
    flex-direction: column;
    gap: 16px;
  }
  .overview-text,
  .overview-graphic {
    width: 100%;
  }
}
@media (max-width: 1000px) {
  nav a {
    display: none;
  }
  header {
    width: 100vw;
    left: 0;
    right: 0;
    padding: 0 20px;
    margin-top: 0;
    transform: none;
    border-radius: 0;
    box-sizing: border-box;
  }
  .overview {
    width: 100vw;
    padding-left: 20px;
    padding-right: 20px;
    box-sizing: border-box;
    overflow: hidden;
  }
  .tech-list {
    margin-left: -20px;
  }
  .hero {
    margin-bottom: 0;
  }
  .hero h1 {
    font-size: 3em;
  }

  h2 {
    font-size: 2em;
  }
  .overview .overview-desc {
    font-size: 2em;
  }
  .goal-list {
    flex-direction: column;
  }
  .service-item {
    display: flex;
    flex-direction: column-reverse;
    gap: 10px;
  }
  .service-item h3 {
    font-size: 1.5em;
  }
  .service-item .tag {
    display: none;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section,
.overview,
.service-item,
.tech-list > div,
.goal-item,
.contact-info,
.contact-form,
h1,
h2,
p {
  animation: fadeInUp 0.8s cubic-bezier(0.4, 1.5, 0.5, 1) both;
}
section {
  animation-delay: 0.1s;
  scroll-margin-top: 100px;
}
h1,
h2 {
  animation-delay: 0.2s;
}
p,
.service-item,
.tech-list > div,
.goal-item,
.contact-info,
.contact-form {
  animation-delay: 0.3s;
}

html {
  scroll-behavior: smooth;
}

.site-footer {
  width: 100%;
  padding: 32px 0 24px 0;
  background: none;
  color: #888;
  font-size: 1em;
  text-align: center;
  border-top: 1px solid #eee;
  margin-top: 60px;
}
.footer-content {
  max-width: 1140px;
  margin: 0 auto;
  letter-spacing: 1px;
  font-weight: 400;
}

.contact-row {
  display: flex;
  align-items: center;
  margin-bottom: 32px;
}
.contact-icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 20px;
  flex-shrink: 0;
  background: #eee;
}
.contact-icon {
  font-size: 0.5em;
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-text {
  font-size: 1.1em;
  color: #444;
}
.contact-text b {
  font-size: 1.1em;
  font-weight: bold;
}

.navbar-hero {
  /* hero 区域时，导航栏文字为白色 */
}
header.navbar-hero .logo,
header.navbar-hero nav a,
header.navbar-hero nav button {
  color: #fff !important;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.25), 0 1px 0 #222;
}
header.navbar-hero {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

header:not(.navbar-hero) .logo,
header:not(.navbar-hero) nav a,
header:not(.navbar-hero) nav button {
  color: #111 !important;
  text-shadow: none;
}
header:not(.navbar-hero) {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

/* 通用 hover 小手指针 */
button:hover,
a:hover,
nav a:hover,
nav button:hover,
.hero-button:hover,
.service-item:hover,
.tech-card:hover,
.goal-item:hover,
.contact-form button:hover {
  cursor: pointer !important;
}

.goal-item.goal-hover-active {
  transform: translateY(-12px) scale(1.04) rotate(-1deg);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.18);
  background: linear-gradient(100deg, #222 80%, #00c3ff 100%);
}
.goal-item.goal-hover-active .goal-title {
  color: #00c3ff;
  letter-spacing: 3px;
  transition: color 0.3s, letter-spacing 0.3s;
}
.goal-item.goal-hover-active .goal-desc {
  color: #fff;
  opacity: 1;
  transition: color 0.3s, opacity 0.3s;
}

.goal-item.goal-entrance {
  animation: goalEntrance 0.4s cubic-bezier(0.4, 1.5, 0.5, 1) both;
}
@keyframes goalEntrance {
  from {
    opacity: 0;
    transform: translateX(120px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.goal-item.animating {
  pointer-events: none;
}
.goal-item.animated::before {
  display: none !important;
}