:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #0b1b3a;
  --muted: #66708b;
  --brand: #1a92ff;
  --brand-dark: #0c6bd8;
  --accent: #17c2a4;
  --shadow: 0 18px 40px rgba(8, 20, 60, 0.08);
  --radius: 20px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f2f6ff 0%, #ffffff 40%, #f7f9ff 100%);
  line-height: 1.6;
  scrollbar-width: none;
}

body::-webkit-scrollbar {
  width: 0;
  height: 0;
}

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

.download-body {
  background: #00adef;
  color: #ffffff;
}

.container {
  width: min(1160px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.brand {
  display: flex;
  align-items: center;
}

.brand-logo {
  width: 228px;
  height: 60px;
  object-fit: contain;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 16px;
  font-weight: 600;
  color: #4b5567;
}

.nav-links a {
  position: relative;
  padding: 8px 2px;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: #00ADEF;
  transition: width 0.2s ease, left 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: #00ADEF;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after,
.nav-links a.is-active::after {
  width: 100%;
  left: 0;
}

.nav-cta {
  padding: 10px 20px;
  border-radius: 999px;
  background: #0e1736;
  color: white;
}

.hero {
  position: relative;
  padding: 90px 0 40px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  gap: 60px;
  align-items: center;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.eyebrow {
  font-size: 64px;
  font-weight: 600;
  color: #00ADEF;
  line-height: 40px;
  letter-spacing: 0;
  text-align: left;
  margin-bottom: 12px;
}

.hero-copy h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.lead {
  font-size: 17px;
  color: var(--muted);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 28px 0 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: linear-gradient(180deg, #00ADEF 0%, #62A5F8 100%);
  color: #fff;
  box-shadow: 0 12px 28px rgba(26, 146, 255, 0.3);
}

.btn.ghost {
  background: #fff;
  color: #111827;
  border-color: rgba(15, 23, 42, 0.18);
}

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

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.hero-metrics div {
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.hero-metrics strong {
  display: block;
  font-size: 20px;
  margin-bottom: 4px;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 13px;
}

.hero-media {
  position: relative;
}

.hero-image {
  width: min(512px, 100%);
  aspect-ratio: 512 / 322;
  border-radius: 24px;
  object-fit: cover;
  display: block;
  margin: 0 auto;
}

.hero-glow {
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 146, 255, 0.25), transparent 70%);
  top: -120px;
  right: -180px;
  pointer-events: none;
}

.features {
  padding: 70px 0 40px;
}

.features h2,
.apply h2 {
  font-size: clamp(24px, 3.5vw, 36px);
  margin-bottom: 12px;
}

.section-lead {
  color: var(--muted);
  margin-bottom: 36px;
}

.feature-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 26px 24px 90px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.card h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

.card ul {
  list-style: none;
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-size: 16px;
}

.card li::before {
  content: "";
  width: 20px;
  height: 20px;
  background: url("images/gou.png") center/contain no-repeat;
  display: inline-block;
  margin-right: 8px;
  vertical-align: middle;
}

.card-asset {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 110px;
  height: 70px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(26, 146, 255, 0.2), rgba(23, 194, 164, 0.3));
  display: grid;
  place-items: center;
  color: #4b5567;
  font-size: 12px;
}

.card-asset.deploy {
  width: 152px;
  height: 130px;
  right: 0;
  bottom: 0;
  border-radius: 20px;
  background: url("images/2.png") center/contain no-repeat;
}

.card-asset.collaborate {
  width: 152px;
  height: 130px;
  right: 0;
  bottom: 0;
  border-radius: 20px;
  background: url("images/3.png") center/contain no-repeat;
}

.card-asset.govern {
  width: 152px;
  height: 130px;
  right: 0;
  bottom: 0;
  border-radius: 20px;
  background: url("images/4.png") center/contain no-repeat;
}

.apply {
  background: #0b173a;
  color: #fff;
  padding: 70px 0;
}

.apply-inner {
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.apply .section-lead {
  color: #c7d2fe;
}

.apply-form {
  display: grid;
  gap: 14px;
  background: rgba(255, 255, 255, 0.08);
  padding: 22px;
  border-radius: 18px;
}

.apply-form label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: #e2e8f0;
}

.apply-form input,
.apply-form textarea {
  padding: 10px 12px;
  border-radius: 12px;
  border: none;
  font-size: 14px;
}

.contact {
  padding: 30px 0 80px;
}

.download-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 48px 20px 64px;
}

.download-wrap {
  display: grid;
  justify-items: center;
  text-align: center;
  gap: 22px;
  width: min(680px, 92vw);
}

.download-logo {
  width: 160px;
  height: 160px;
  border-radius: 36px;
  background: #ffffff;
  display: grid;
  place-items: center;
  box-shadow: 0 18px 30px rgba(0, 0, 0, 0.18);
}

.download-logo img {
  width: 110px;
  height: 110px;
  object-fit: contain;
}

.download-page h1 {
  font-family: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Hiragino Sans GB", sans-serif;
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0;
}

.download-phones img {
  width: min(660px, 92vw);
  height: auto;
  display: block;
  filter: drop-shadow(0 22px 30px rgba(0, 0, 0, 0.28));
}

.download-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 160px));
  gap: 32px;
}

.download-card {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  padding: 24px 16px 20px;
  display: grid;
  justify-items: center;
  gap: 8px;
  position: relative;
  transition: transform 0.2s ease, background 0.2s ease;
}

.download-qr {
  position: absolute;
  top: 0;
  right: 0;
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-top-right-radius: 18px;
}

.download-card img {
  width: 60px;
  height: 60px;
  object-fit: contain;
}

.download-card span {
  font-size: 16px;
  font-weight: 600;
}

.download-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.18);
}

@media (max-width: 520px) {
  .download-page {
    padding: 36px 16px 48px;
  }

  .download-logo {
    width: 120px;
    height: 120px;
    border-radius: 28px;
  }

  .download-logo img {
    width: 84px;
    height: 84px;
  }

  .download-actions {
    grid-template-columns: 1fr;
    width: min(220px, 80vw);
  }
}

.contact-grid {
  display: grid;
  gap: 22px;
  margin-top: 12px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.contact-card {
  background: var(--surface);
  padding: 22px;
  border-radius: 18px;
  display: flex;
  gap: 14px;
  align-items: center;
  box-shadow: var(--shadow);
}

.contact-card.contact-action {
  cursor: pointer;
}

.contact-card .icon {
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 20px;
}

.contact-card .icon img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  display: block;
}

.site-footer {
  padding: 30px 0 40px;
  background: #ffffff;
  text-align: center;
  color: #505050;
  font-weight: 400;
  font-size: 12px;
  line-height: 100%;
  letter-spacing: 0px;

}

.site-footer p+p {
  margin-top: 6px;
}

/* Apply page */
.apply-page {
  background: #f6f7fb;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.apply-page main {
  flex: 1;
}

.apply-hero {
  background: url("images/c_bg.png") center/cover no-repeat;
  height: 260px;
  padding: 0;
  position: relative;
  overflow: hidden;
}

.apply-hero::before,
.apply-hero::after {
  content: "";
  position: absolute;
  width: 140px;
  height: 140px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 32px;
  transform: rotate(45deg);
}

.apply-hero::before {
  left: 6%;
  top: -40px;
}

.apply-hero::after {
  right: 10%;
  top: 20px;
}

.apply-hero-inner {
  height: 100%;
  display: grid;
  place-items: center;
  width: min(1080px, 92vw);
  margin: 0 auto;
  text-align: center;
  color: #fff;
  position: relative;
  z-index: 1;
}

.apply-hero-title {
  display: inline-flex;
  align-items: center;
  gap: 16px;
}

.apply-hero-title h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.apply-hero-title span {
  width: 42px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  position: relative;
}

.apply-hero-title span::after {
  content: "";
  position: absolute;
  inset: -6px 12px;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 999px;
}

.apply-body {
  width: min(920px, 92vw);
  margin: 36px auto 80px;
  text-align: center;
}

.apply-note {
  font-size: 15px;
  color: #4b5567;
  margin-bottom: 24px;
}

.apply-card {
  background: #fff;
  border-radius: 18px;
  padding: clamp(22px, 4vw, 36px);
  box-shadow: 0 24px 60px rgba(12, 32, 92, 0.08);
}

.apply-form {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  text-align: left;
}

.apply-field {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: #1f2937;
}

.apply-field span {
  font-weight: 500;
  font-size: 16px;
  line-height: 40px;
  letter-spacing: 0;
  color: #000000;
}

.apply-field em {
  color: #ef4444;
  font-style: normal;
}

.apply-field input {
  height: 44px;
  border-radius: 8px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  padding: 0 14px;
  font-size: 14px;
  color: #000000;
}

.apply-submit {
  grid-column: 1 / -1;
  margin-top: 12px;
  height: 44px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(180deg, #00ADEF 0%, #62A5F8 100%);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.apply-tip {
  grid-column: 1 / -1;
  font-size: 12px;
  color: #9ca3af;
  text-align: center;
}


/* Contact page */
.contact-page {
  background: #f6f7fb;
}

.contact-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.contact-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 18px;
}

.contact-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
}

.contact-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.contact-links {
  display: flex;
  gap: 22px;
  font-size: 15px;
  color: #4b5567;
}

.contact-links a {
  padding: 8px 14px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.contact-links a:hover,
.contact-links a.is-active {
  background: rgba(26, 146, 255, 0.12);
  color: #1a92ff;
}

.contact-hero {
  position: relative;
  padding: 120px 0 70px;
  background: radial-gradient(circle at 20% 20%, rgba(26, 146, 255, 0.35), transparent 55%),
    linear-gradient(120deg, #0b173a 0%, #1d4ed8 100%);
  color: #fff;
  overflow: hidden;
}

.contact-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.contact-hero-inner {
  position: relative;
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.contact-hero-inner h1 {
  font-size: clamp(32px, 5vw, 56px);
  margin-bottom: 16px;
  font-weight: 700;
}

.contact-hero-inner p {
  font-size: clamp(18px, 3.2vw, 32px);
  max-width: 640px;
  line-height: 1.5;
}

.contact-hero-note-wrapper {
  width: min(980px, 92vw);
  margin: -34px auto 0;
}

.contact-hero-note {
  background: #ffffff;
  padding: 20px 24px;
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(12, 32, 92, 0.12);
  color: #4b5567;
}

.invite-section {
  padding: 60px 0 90px;
}

.invite-card {
  background: #fff;
  border-radius: 26px;
  padding: clamp(24px, 4vw, 40px);
  box-shadow: 0 24px 60px rgba(12, 32, 92, 0.08);
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.invite-title {
  font-size: clamp(22px, 3vw, 30px);
  margin-bottom: 28px;
  font-weight: 700;
}

.invite-form {
  display: grid;
  gap: 18px;
}

.invite-form-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.invite-field {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: #1f2937;
}

.invite-label {
  font-weight: 600;
}

.required-star {
  color: #f97316;
  margin-left: 4px;
}

.invite-input {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.invite-input:focus {
  border-color: rgba(26, 146, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(26, 146, 255, 0.15);
}

.invite-actions {
  display: grid;
  gap: 10px;
}

.invite-submit {
  justify-self: start;
  padding: 12px 26px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(120deg, #1a92ff 0%, #0c6bd8 100%);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(26, 146, 255, 0.25);
}

.invite-note {
  font-size: 13px;
  color: #6b7280;
}

.footer-modern {
  background: #0b173a;
  color: #e2e8f0;
  padding: 60px 0 40px;
}

.footer-main {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer-brand-top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.footer-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.footer-title {
  font-size: 20px;
  font-weight: 700;
}

.footer-subtitle {
  font-size: 13px;
  color: #94a3b8;
  margin-top: 4px;
}

.footer-description {
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.6;
}

.footer-contact h3,
.footer-download h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

.footer-contact-item {
  display: grid;
  gap: 6px;
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-contact-item a {
  color: #60a5fa;
}

.footer-contact-label {
  font-size: 12px;
  color: #94a3b8;
}

.footer-download {
  display: grid;
  gap: 12px;
  justify-items: start;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.footer-download-note {
  font-size: 12px;
  color: #94a3b8;
}

.footer-modern .footer-divider {
  margin: 28px 0 20px;
  background: rgba(148, 163, 184, 0.25);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.footer-copy {
  font-size: 13px;
  color: #94a3b8;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
}

.social-icon img {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.language-selector {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: none;
  background: #1a92ff;
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px rgba(26, 146, 255, 0.3);
  cursor: pointer;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 40;
}

.modal-content {
  background: #fff;
  border-radius: 20px;
  padding: 28px;
  max-width: 360px;
  width: 100%;
  text-align: center;
  box-shadow: 0 30px 60px rgba(12, 32, 92, 0.18);
}

.modal-icon {
  width: auto;
  height: auto;
  border-radius: 0;
  background: transparent;
  display: block;
  margin: 0 0 10px;
  color: #000000;
  font-size: 20px;
  font-weight: 600;
}

.modal-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.modal-text {
  font-size: 14px;
  color: #6b7280;
  margin-bottom: 18px;
}

.modal-contact {
  background: #f1f5ff;
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 18px;
}

.contact-label {
  font-size: 12px;
  color: #94a3b8;
  margin-bottom: 6px;
}

.contact-email {
  color: #00ADEF;
  font-size: 13px;
}

.modal-close-btn {
  width: 100%;
  padding: 10px 0;
  border: none;
  border-radius: 999px;
  background: #00ADEF;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}



/* ========== 现代化页脚样式 ========== */
.footer-modern {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: white;
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
}

.footer-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(95, 154, 194, 0.3), transparent);
}

/* 主要内容区域 */
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

/* 品牌区域 */
.footer-brand h3 {
  font-size: 20px;
  margin-bottom: 16px;
}

/* 联系方式区域 */
.footer-contact h3 {
  font-size: 18px;
  font-weight: 600;
  color: #f1f5f9;
}

/* 下载区域 */
.footer-download {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.footer-download h3 {
  font-size: 18px;
  font-weight: 600;
  color: #f1f5f9;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #43C6A7 0%, #82b8e2 100%);
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(95, 154, 194, 0.3);
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(95, 154, 194, 0.4);
}

.download-btn:active {
  transform: translateY(0);
}

/* 分隔线 */
.footer-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  margin: 0 auto 40px;
}

/* 底部信息 */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

/* 社交媒体图标 */
.footer-social {
  display: flex;
  gap: 16px;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-icon img {
  width: 24px;
  height: 24px;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.social-icon:hover {
  background: rgba(95, 154, 194, 0.2);
  transform: translateY(-3px);
}

.social-icon:hover img {
  opacity: 1;
}

/* 语言选择器 */
.language-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  color: #e2e8f0;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.language-selector:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-brand,
  .footer-contact {
    max-width: 100%;
  }

  .footer-download {
    align-items: flex-start;
    text-align: left;
  }
}

@media (max-width: 768px) {
  .footer-modern {
    padding: 60px 0 30px;
  }

  .footer-main {
    gap: 32px;
    margin-bottom: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }

  .footer-social {
    justify-content: center;
  }

  .download-btn {
    width: 100%;
    justify-content: center;
  }
}


@media (max-width: 860px) {
  .nav-links {
    gap: 16px;
    font-size: 14px;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .apply-body {
    margin: 28px auto 70px;
  }
}

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    gap: 12px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 70px 0 50px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .contact-links {
    flex-wrap: wrap;
  }

  .contact-hero {
    padding: 96px 0 60px;
  }

  .invite-submit {
    width: 100%;
    justify-self: stretch;
  }

  .apply-hero {
    padding: 52px 0 44px;
  }

  .apply-hero-title {
    gap: 10px;
  }

  .apply-hero-title span {
    width: 28px;
  }

  .apply-card {
    padding: 20px;
  }

  .apply-form {
    grid-template-columns: 1fr;
  }

}

@media (prefers-reduced-motion: no-preference) {

  .hero-copy,
  .hero-media,
  .card,
  .contact-card {
    animation: float-in 0.8s ease both;
  }

  .hero-media {
    animation-delay: 0.1s;
  }

  .card:nth-child(2) {
    animation-delay: 0.2s;
  }

  .card:nth-child(3) {
    animation-delay: 0.3s;
  }
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}