:root {
  --ink: #17211f;
  --muted: #5d6b67;
  --line: #d9e1de;
  --paper: #f7f8f5;
  --white: #ffffff;
  --green: #0f6b52;
  --green-deep: #083f36;
  --blue: #2f6f9f;
  --amber: #c8943f;
  --shadow: 0 18px 50px rgba(16, 34, 30, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(247, 248, 245, 0.88);
  border-bottom: 1px solid rgba(217, 225, 222, 0.8);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--white);
  background: var(--green-deep);
  border-radius: 8px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

.site-nav a:hover {
  color: var(--green);
}

.site-nav a[aria-current="page"] {
  color: var(--green-deep);
  font-weight: 700;
}

.site-nav .nav-feature {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  color: var(--white);
  background: var(--green-deep);
  border: 1px solid rgba(143, 212, 189, 0.56);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(8, 63, 54, 0.18);
  overflow: hidden;
}

.site-nav .nav-feature::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 0%, rgba(255, 255, 255, 0.26) 45%, transparent 70%);
  transform: translateX(-120%);
  animation: navShine 4.8s ease-in-out infinite;
}

.site-nav .nav-feature:hover {
  color: var(--white);
  background: var(--green);
}

.site-nav .nav-feature[aria-current="page"] {
  color: var(--white);
}

.site-nav .nav-feature[aria-current="page"]:hover {
  color: var(--white);
  background: var(--green);
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  padding: 120px clamp(20px, 5vw, 72px) 96px;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 107, 82, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 111, 159, 0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.68) 48%, transparent 86%);
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(247, 248, 245, 0.98) 0%, rgba(247, 248, 245, 0.84) 36%, rgba(247, 248, 245, 0.25) 64%),
    url("../images/ai-project-hero.png") center right / cover no-repeat;
}

.tech-layer {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.scan-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(15, 107, 82, 0.7), transparent);
  animation: scan 7s linear infinite;
}

.node,
.data-line {
  position: absolute;
  opacity: 0.85;
}

.node {
  width: 12px;
  height: 12px;
  border: 2px solid rgba(143, 212, 189, 0.85);
  border-radius: 50%;
  box-shadow: 0 0 22px rgba(15, 107, 82, 0.5);
  animation: nodePulse 2.8s ease-in-out infinite;
}

.node::after {
  content: "";
  position: absolute;
  inset: -12px;
  border: 1px solid rgba(143, 212, 189, 0.28);
  border-radius: 50%;
}

.node-a {
  top: 30%;
  right: 31%;
}

.node-b {
  top: 48%;
  right: 18%;
  animation-delay: 0.7s;
}

.node-c {
  top: 64%;
  right: 39%;
  animation-delay: 1.4s;
}

.data-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(47, 111, 159, 0.72), rgba(15, 107, 82, 0.85), transparent);
  transform-origin: left center;
  animation: dataFlow 4.8s ease-in-out infinite;
}

.line-a {
  top: 36%;
  right: 20%;
  width: 260px;
  transform: rotate(17deg);
}

.line-b {
  top: 57%;
  right: 26%;
  width: 300px;
  transform: rotate(-11deg);
  animation-delay: 1.1s;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.hero-copy {
  max-width: 640px;
  color: #42504c;
  font-size: 19px;
}

.hero-actions,
.contact {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--green);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: var(--white);
  background: var(--green);
}

.button.secondary {
  color: var(--green-deep);
  background: rgba(255, 255, 255, 0.72);
}

.hero-panel {
  position: absolute;
  z-index: 2;
  right: clamp(20px, 5vw, 72px);
  bottom: 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 1fr));
  gap: 1px;
  width: min(660px, calc(100% - 40px));
  overflow: hidden;
  border: 1px solid rgba(217, 225, 222, 0.86);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-panel div {
  position: relative;
  padding: 18px;
  background: rgba(255, 255, 255, 0.72);
  overflow: hidden;
}

.pulse-card::after {
  content: "";
  position: absolute;
  inset: auto 18px 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--blue), transparent);
  transform: translateX(-110%);
  animation: cardTrace 4.5s ease-in-out infinite;
}

.pulse-card:nth-child(2)::after {
  animation-delay: 0.8s;
}

.pulse-card:nth-child(3)::after {
  animation-delay: 1.6s;
}

.hero-panel span {
  display: block;
  color: var(--amber);
  font-size: 13px;
  font-weight: 800;
}

.section {
  padding: 92px clamp(20px, 5vw, 72px);
}

.training-carousel {
  padding: 86px clamp(20px, 5vw, 72px);
  background:
    linear-gradient(135deg, rgba(15, 107, 82, 0.08), rgba(47, 111, 159, 0.1)),
    var(--white);
}

.carousel-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.carousel-heading h2 {
  margin-bottom: 0;
}

.carousel-shell {
  position: relative;
  overflow: hidden;
  min-height: 430px;
  border: 1px solid rgba(217, 225, 222, 0.9);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(247, 248, 245, 0.98), rgba(247, 248, 245, 0.8)),
    url("../images/ai-project-hero.png") center right / cover no-repeat;
  box-shadow: var(--shadow);
}

.carousel-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 107, 82, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 111, 159, 0.08) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.carousel-track {
  position: relative;
  min-height: 430px;
}

.training-slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(280px, 0.7fr);
  align-items: center;
  gap: 34px;
  padding: clamp(28px, 5vw, 62px);
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  pointer-events: none;
}

.training-slide.is-active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.slide-copy {
  max-width: 700px;
}

.slide-kicker {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
}

.training-slide h3 {
  max-width: 620px;
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.16;
}

.training-slide p {
  max-width: 650px;
  color: var(--muted);
  font-size: 18px;
}

.training-slide ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.training-slide li {
  position: relative;
  padding-left: 22px;
  color: #34413d;
}

.training-slide li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--amber);
  border-radius: 50%;
}

.slide-visual {
  position: relative;
  display: grid;
  align-content: center;
  min-height: 260px;
  padding: 30px;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(8, 63, 54, 0.94), rgba(47, 111, 159, 0.82)),
    rgba(8, 63, 54, 0.92);
  border: 1px solid rgba(143, 212, 189, 0.35);
  border-radius: 8px;
  overflow: hidden;
}

.slide-visual::before,
.slide-visual::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  animation: nodePulse 3.6s ease-in-out infinite;
}

.slide-visual::before {
  width: 180px;
  height: 180px;
  right: -46px;
  top: -52px;
}

.slide-visual::after {
  width: 260px;
  height: 260px;
  right: 32px;
  bottom: -150px;
  animation-delay: 0.9s;
}

.slide-visual span,
.slide-visual strong {
  position: relative;
  z-index: 1;
}

.slide-visual span {
  color: #a8e8d4;
  font-size: 14px;
  font-weight: 800;
}

.slide-visual strong {
  max-width: 260px;
  margin-top: 14px;
  font-size: 31px;
  line-height: 1.22;
}

.carousel-controls {
  position: absolute;
  right: clamp(22px, 4vw, 48px);
  bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.carousel-button,
.carousel-dot {
  cursor: pointer;
  border: 0;
}

.carousel-button {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--green-deep);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(15, 107, 82, 0.18);
  border-radius: 8px;
  font-size: 26px;
  line-height: 1;
}

.carousel-button:hover {
  color: var(--white);
  background: var(--green);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  background: rgba(15, 107, 82, 0.25);
  border-radius: 999px;
}

.carousel-dot.is-active {
  width: 28px;
  background: var(--green);
}

.intro {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(280px, 1.1fr);
  gap: 52px;
  background: var(--white);
}

.intro p:last-child,
.method-text p,
.contact p {
  color: var(--muted);
  font-size: 18px;
}

.services {
  background: #eef3ef;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.grid article {
  min-height: 255px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.grid p {
  color: var(--muted);
}

.icon {
  display: inline-grid;
  width: 46px;
  height: 46px;
  margin-bottom: 24px;
  place-items: center;
  color: var(--white);
  background: var(--green-deep);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 800;
}

.method {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(320px, 1.15fr);
  gap: 48px;
  background: var(--white);
}

.steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.steps strong {
  color: var(--green);
}

.steps span {
  color: var(--muted);
}

.scenes {
  background: #17211f;
  color: var(--white);
}

.scenes .eyebrow {
  color: #8fd4bd;
}

.scene-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.scene-list span {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.contact {
  justify-content: space-between;
  padding: 72px clamp(20px, 5vw, 72px);
  background: var(--white);
  border-top: 1px solid var(--line);
}

.contact div {
  max-width: 760px;
}

.projects-page {
  background:
    linear-gradient(180deg, rgba(238, 243, 239, 0.9), rgba(247, 248, 245, 0.96) 360px),
    var(--paper);
}

.projects-page .site-header {
  position: sticky;
}

.project-hero {
  display: grid;
  grid-template-columns: minmax(280px, 1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: end;
  padding: 54px clamp(24px, 5vw, 72px) 36px;
  background:
    linear-gradient(90deg, rgba(247, 248, 245, 0.98), rgba(247, 248, 245, 0.78)),
    url("../images/ai-project-hero.png") center right / cover no-repeat;
  border-bottom: 1px solid var(--line);
}

.project-hero-copy {
  max-width: 820px;
}

.project-hero-copy h1 {
  margin-bottom: 16px;
  font-size: clamp(36px, 5vw, 60px);
}

.project-hero-copy p:last-child {
  max-width: 720px;
  color: #42504c;
  font-size: 19px;
}

.project-hero-note {
  padding: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(217, 225, 222, 0.9);
  border-radius: 8px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.project-hero-note span {
  display: block;
  margin-bottom: 10px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 800;
}

.project-hero-note strong {
  display: block;
  color: var(--green-deep);
  font-size: 22px;
  line-height: 1.35;
}

.project-directory {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 34px clamp(24px, 5vw, 72px) 76px;
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 285px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(16, 34, 30, 0.08);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.project-card:hover,
.project-card:focus-visible {
  border-color: rgba(15, 107, 82, 0.48);
  box-shadow: 0 18px 42px rgba(16, 34, 30, 0.14);
  transform: translateY(-3px);
  outline: none;
}

.project-card h2 {
  margin-bottom: 12px;
  color: var(--green-deep);
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.16;
  overflow-wrap: anywhere;
}

.project-card p {
  color: var(--muted);
  font-size: 16px;
}

.project-status {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 6px 10px;
  color: var(--green-deep);
  background: rgba(15, 107, 82, 0.09);
  border: 1px solid rgba(15, 107, 82, 0.14);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}

.project-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: fit-content;
  min-height: 48px;
  margin-top: 26px;
  padding: 0 14px;
  color: var(--green-deep);
  background: rgba(15, 107, 82, 0.08);
  border: 1px solid rgba(15, 107, 82, 0.18);
  border-radius: 8px;
  font-weight: 700;
}

.project-link::after {
  content: "→";
  font-size: 20px;
}

.project-card:hover .project-link,
.project-card:focus-visible .project-link {
  color: var(--white);
  background: var(--green);
}

.project-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 64px clamp(20px, 5vw, 72px);
  background: var(--white);
  border-top: 1px solid var(--line);
}

.project-contact div {
  max-width: 760px;
}

.project-contact p:last-child {
  color: var(--muted);
  font-size: 18px;
}

footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: var(--muted);
  background: #eef3ef;
  font-size: 14px;
}

footer a {
  color: var(--green-deep);
}

footer .beian-icp,
footer .beian-police {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

footer .beian-icp svg,
footer .beian-police img {
  display: block;
  flex: none;
}

footer .beian-icp svg {
  width: 18px;
  height: 18px;
}

footer .beian-police img {
  width: 16px;
  height: 16px;
  object-fit: contain;
}

@keyframes scan {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  10%,
  82% {
    opacity: 1;
  }
  100% {
    transform: translateY(92vh);
    opacity: 0;
  }
}

@keyframes nodePulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.55;
  }
  50% {
    transform: scale(1.35);
    opacity: 1;
  }
}

@keyframes dataFlow {
  0%,
  100% {
    clip-path: inset(0 100% 0 0);
    opacity: 0;
  }
  35%,
  65% {
    clip-path: inset(0 0 0 0);
    opacity: 0.9;
  }
}

@keyframes cardTrace {
  0%,
  55% {
    transform: translateX(-110%);
  }
  78%,
  100% {
    transform: translateX(110%);
  }
}

@keyframes navShine {
  0%,
  54% {
    transform: translateX(-120%);
  }
  80%,
  100% {
    transform: translateX(120%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 980px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .intro,
  .method,
  .training-slide,
  .project-hero {
    grid-template-columns: 1fr;
  }

  .project-directory {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-panel {
    position: relative;
    right: auto;
    bottom: auto;
    margin-top: 48px;
  }

  .carousel-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .carousel-shell,
  .carousel-track {
    min-height: 680px;
  }

  .slide-visual {
    min-height: 210px;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: sticky;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 18px;
  }

  .site-nav {
    gap: 10px;
    font-size: 13px;
  }

  .site-nav .nav-feature {
    min-height: 34px;
    padding: 0 11px;
  }

  .hero {
    min-height: auto;
    padding: 80px 18px 54px;
  }

  .hero-media {
    background:
      linear-gradient(180deg, rgba(247, 248, 245, 0.96) 0%, rgba(247, 248, 245, 0.9) 54%, rgba(247, 248, 245, 0.72) 100%),
      url("../images/ai-project-hero.png") center / cover no-repeat;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-panel,
  .grid,
  .project-directory {
    grid-template-columns: 1fr;
  }

  .section,
  .contact,
  .training-carousel,
  .project-directory,
  .project-contact {
    padding: 58px 18px;
  }

  .project-hero {
    padding: 38px 18px 36px;
  }

  .project-hero-copy p:last-child,
  .project-contact p:last-child {
    font-size: 17px;
  }

  .project-card {
    min-height: auto;
  }

  .project-contact {
    align-items: flex-start;
    flex-direction: column;
  }

  .carousel-shell,
  .carousel-track {
    min-height: 760px;
  }

  .training-slide {
    padding: 26px;
  }

  .training-slide h3 {
    font-size: 29px;
  }

  .training-slide p {
    font-size: 16px;
  }

  .carousel-controls {
    right: 26px;
    bottom: 24px;
    left: 26px;
    justify-content: space-between;
  }

  .steps li {
    grid-template-columns: 1fr;
  }

  footer {
    flex-direction: column;
    padding: 22px 18px;
  }
}