:root {
  --bg: #080b14;
  --bg-alt: #0f1527;
  --text: #eaf0ff;
  --muted: #a6b1cc;
  --primary: #7b8dff;
  --accent: #2ee6c9;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.15);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at 10% 10%, #111a34, var(--bg) 45%);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: 5rem;
}

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(8, 11, 20, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0;
  gap: 1rem;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.5px;
}

.nav {
  display: flex;
  gap: 1.2rem;
  color: var(--muted);
  font-size: 0.96rem;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.lang-btn {
  font: inherit;
  font-size: 0.8rem;
  padding: 0.38rem 0.62rem;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.lang-btn.is-active {
  background: rgba(123, 141, 255, 0.28);
  color: var(--text);
}

.lang-btn:hover:not(.is-active) {
  color: var(--text);
}

body.lang-en {
  font-family: Inter, system-ui, sans-serif;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  background: linear-gradient(100deg, var(--primary), #6d71ff);
  color: white;
  padding: 0.72rem 1.15rem;
  border-radius: 10px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 10px 24px rgba(123, 141, 255, 0.25);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.btn-sm {
  padding: 0.5rem 0.95rem;
  font-size: 0.92rem;
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  box-shadow: none;
}

.hero {
  padding: 4.2rem 0 2.4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  margin: 0.2rem 0 1rem;
}

.hero-text {
  color: var(--muted);
  max-width: 56ch;
}

.hero-actions {
  margin-top: 1.2rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.hero-card,
.feature-card,
.service-card,
.case-card,
.pricing {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.hero-card {
  padding: 1.2rem 1.3rem;
}

.hidden {
  display: none !important;
}

.hero-carousel-placeholder {
  margin-top: 0.5rem;
  border-radius: 12px;
  border: 1px dashed rgba(255, 255, 255, 0.22);
  background: rgba(0, 0, 0, 0.22);
  aspect-ratio: 16 / 10;
  min-height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.1rem;
  text-align: center;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--muted);
}

.hero-carousel {
  margin-top: 0.5rem;
}

.hero-carousel-viewport {
  overflow: hidden;
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.2);
}

.hero-carousel-track {
  display: flex;
  transition: transform 0.45s ease;
  will-change: transform;
  /* 宽度由 JS 设为 n×100%，保证 translateX(%) 相对轨道宽度计算正确 */
}

.hero-carousel-slide {
  flex-shrink: 0;
  min-width: 0;
  box-sizing: border-box;
}

.hero-carousel-slide img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
  vertical-align: middle;
  cursor: zoom-in;
}

.hero-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: min(1.25rem, 4vw);
  box-sizing: border-box;
}

.hero-lightbox.hidden {
  display: none !important;
}

.hero-lightbox-backdrop {
  position: absolute;
  inset: 0;
  border: none;
  padding: 0;
  margin: 0;
  background: rgba(5, 8, 18, 0.88);
  backdrop-filter: blur(6px);
  cursor: zoom-out;
}

.hero-lightbox-panel {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: min(96vw, 1280px);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
}

.hero-lightbox-close {
  position: absolute;
  top: -2.75rem;
  right: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.hero-lightbox-close:hover {
  background: rgba(123, 141, 255, 0.25);
}

.hero-lightbox-img {
  max-width: 100%;
  max-height: min(82vh, 900px);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.45);
}

.hero-lightbox-caption {
  margin: 0;
  max-width: 56rem;
  text-align: center;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.45;
}

.hero-lightbox-caption:empty {
  display: none;
}

@media (max-width: 640px) {
  .hero-lightbox-close {
    top: auto;
    bottom: calc(100% + 0.5rem);
    right: 0;
  }
}

.hero-carousel-caption {
  margin: 0.5rem 0 0;
  font-size: 0.86rem;
  color: var(--muted);
  text-align: center;
  min-height: 1.2em;
}

.hero-carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.55rem;
}

.hero-carousel-btn {
  font: inherit;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  line-height: 1;
  font-size: 1.1rem;
  padding: 0;
}

.hero-carousel-btn:hover {
  background: rgba(123, 141, 255, 0.2);
}

.hero-carousel-dots {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.hero-carousel-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: rgba(255, 255, 255, 0.25);
  cursor: pointer;
}

.hero-carousel-dot.is-active {
  background: var(--accent);
  transform: scale(1.15);
}

.hero-fallback-list {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.card-cta {
  margin-top: 1rem;
  color: var(--accent);
  font-size: 0.92rem;
}

.hero-stats {
  margin-top: 1.4rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.hero-stats div {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 0.8rem;
}

.num {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
}

.hero-stats p:last-child {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-title {
  margin: 0 0 1.2rem;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

.feature-card,
.service-card,
.case-card {
  padding: 1rem 1.1rem;
}

.feature-card p,
.service-card p,
.case-card p,
.pricing p,
.contact p {
  color: var(--muted);
}

.pricing {
  padding: 1.4rem;
  text-align: center;
}

.pricing-wrap {
  display: grid;
  gap: 1.25rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-inquiry {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem 1.4rem;
}

.inquiry-title {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--accent);
  text-align: center;
}

.pricing-form {
  display: grid;
  gap: 0.85rem;
}

.inquiry-label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
  text-align: left;
}

.pricing-form input,
.pricing-form textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0.6rem 0.72rem;
  font: inherit;
}

.pricing-form textarea {
  resize: vertical;
  min-height: 5rem;
}

.pricing-form input:focus,
.pricing-form textarea:focus {
  outline: 2px solid rgba(46, 230, 201, 0.35);
}

.inquiry-msg {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--accent);
  min-height: 1.2em;
  text-align: left;
}

.contact-grid {
  display: grid;
  gap: 1.2rem;
  align-items: start;
}

.contact-grid.contact-single {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.contact-list {
  margin-top: 1rem;
}

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  padding: 0.55rem 0 0.7rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(8, 11, 20, 0.9);
  backdrop-filter: blur(12px);
}

.site-footer p {
  margin: 0.1rem 0;
}

.footer-record {
  font-size: 0.85rem;
}

.bg-glow {
  position: fixed;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
}

.bg-glow-1 {
  background: rgba(123, 141, 255, 0.35);
  top: -60px;
  left: -50px;
}

.bg-glow-2 {
  background: rgba(46, 230, 201, 0.25);
  bottom: -80px;
  right: -30px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .nav {
    display: none;
  }

  .hero-grid,
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}