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

body {
  font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Arial, sans-serif;
  color: #1d1d1f;
  background: #ffffff;
  line-height: 1.7;
  overflow-x: hidden;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Header Styles */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(20px);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
}

.logo {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.15rem;
  color: #1d1d1f;
  transition: opacity 0.3s ease;
}

.logo:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  font-size: 0.975rem;
  font-weight: 400;
}

.nav-links a {
  color: #1d1d1f;
  text-decoration: none;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #1d1d1f;
  transition: width 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

.nav-links .cta {
  background: #1d1d1f;
  color: #ffffff;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  border: none;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.nav-links .cta::after {
  display: none;
}

.nav-links .cta:hover {
  background: #333333;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Hero Section */
.hero {
  padding: 10rem 0 8rem;
  position: relative;
  overflow: hidden;
  background: #ffffff;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(29, 29, 31, 0.03) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.hero-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 5rem;
  align-items: center;
}

.hero-text {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards 0.2s;
}

.hero-text h1 {
  font-size: clamp(3rem, 6vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: #1d1d1f;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  max-width: 580px;
  color: #86868b;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.25rem;
  font-size: 0.775rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: #86868b;
  display: block;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.button {
  padding: 1rem 2rem;
  border-radius: 9999px;
  border: 1px solid transparent;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  font-size: 0.975rem;
  min-width: 160px;
}

.button.primary {
  background: #1d1d1f;
  color: #ffffff;
}

.button.primary:hover {
  background: #333333;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.button.ghost {
  border-color: #d2d2d7;
  color: #1d1d1f;
  background: transparent;
}

.button.ghost:hover {
  border-color: #1d1d1f;
  background: rgba(29, 29, 31, 0.02);
  transform: translateY(-1px);
}

/* Glass Card */
.hero-visual {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards 0.4s;
}

.glass-card {
  background: rgba(255, 255, 255, 0.7);
  padding: 3rem;
  border-radius: 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.12);
}

.glass-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: #1d1d1f;
}

.glass-card p {
  color: #86868b;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.stat .label {
  color: #86868b;
  font-weight: 400;
}

.stat .value {
  font-weight: 600;
  color: #1d1d1f;
}

/* Services Section */
.about-us {
  padding: 8rem 0;
  background: #fafafa;
  position: relative;
}

.about-us::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(29, 29, 31, 0.02) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-content p {
  font-size: 1.125rem;
  color: #86868b;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.services {
  padding: 8rem 0;
  background: #ffffff;
}

/* Industries Section */
.industries {
  padding: 8rem 0;
  background: #fafafa;
  position: relative;
}

.industries::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(29, 29, 31, 0.02) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 5rem;
}

.industry-card {
  background: #ffffff;
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
}

.industry-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.1);
}

.industry-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  transition: transform 0.3s ease;
}

.industry-card:hover .industry-icon {
  transform: scale(1.1);
}

.industry-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1d1d1f;
  line-height: 1.4;
  margin: 0;
}

@media (max-width: 768px) {
  .industries-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 3.5rem;
  }
  
  .industry-card {
    padding: 2rem;
  }
  
  .industry-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
  }
}

.section-header {
  text-align: center;
  margin-bottom: 5rem;
}

.section-header h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1d1d1f;
  margin-bottom: 1.25rem;
}

.section-subheader {
  text-align: left;
  margin-top: 6rem;
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-subheader h3 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1d1d1f;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
}

.card {
  background: #ffffff;
  border-radius: 20px;
  padding: 2.5rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  border-color: rgba(0, 0, 0, 0.1);
}

.card h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: #1d1d1f;
}

.card p {
  color: #86868b;
  line-height: 1.7;
}

/* Approach Section */
.approach {
  padding: 10rem 0;
  position: relative;
  background: #ffffff;
}

.approach::before {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(29, 29, 31, 0.02) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 6rem;
  align-items: center;
}

.split > div:first-child h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1d1d1f;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

/* 确保左边内容垂直居中 */
.fade-in-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
}

.advantages-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 1.125rem;
  color: #86868b;
}

.advantages-list li {
  padding: 0.5rem 0;
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
}

/* 移除多余的伪元素，因为HTML中已经直接使用了✔符号 */

.pillars {
  display: grid;
  gap: 2rem;
}

.pillars > div {
  background: #ffffff;
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.pillars > div:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.pillars h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #1d1d1f;
}

.pillars p {
  color: #86868b;
  line-height: 1.6;
}

/* Cases Section */
.cases {
  padding: 8rem 0;
  background: #1d1d1f;
  color: #ffffff;
}

.cases .section-header {
  margin-bottom: 5rem;
}

.cases .section-header h2 {
  color: #ffffff;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.case-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.case-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.case-card h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.case-meta {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.18rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 0.75rem 0 1.25rem;
  display: block;
}

.case-card p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

/* Assurance Section */
.assurance {
  padding: 10rem 0;
  background: #fafafa;
}

.assurance-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 6rem;
  align-items: center;
}

.assurance-content > div:first-child h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1d1d1f;
  margin-bottom: 1.5rem;
}

.assurance-content > div:first-child p {
  font-size: 1.125rem;
  color: #86868b;
  line-height: 1.7;
}

.metrics {
  display: grid;
  gap: 3rem;
}

.metrics > div {
  transition: transform 0.3s ease;
}

.metrics > div:hover {
  transform: translateX(10px);
}

.metric-value {
  font-size: 3rem;
  font-weight: 600;
  color: #1d1d1f;
  display: block;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.metric-label {
  color: #86868b;
  font-size: 1rem;
  line-height: 1.6;
}

/* Contact Section */
.contact {
  padding: 10rem 0;
}

.contact-card {
  background: #ffffff;
  border-radius: 24px;
  padding: 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.05);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards;
}

.contact-content h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1d1d1f;
  margin-bottom: 2rem;
  line-height: 1.35;
  background: linear-gradient(135deg, #1d1d1f 0%, #333333 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: 1;
  overflow: visible;
}

.consultation-highlight {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1d1d1f;
  margin-bottom: 1.5rem;
  padding: 1.25rem;
  background: rgba(29, 29, 31, 0.05);
  border-radius: 16px;
  border-left: 4px solid #1d1d1f;
  line-height: 1.3;
  transition: all 0.3s ease;
  margin-top: 0;
}

.consultation-highlight:hover {
  background: rgba(29, 29, 31, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.consultation-details {
  font-size: 1.125rem;
  color: #86868b;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.contact-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-form {
  display: grid;
  gap: 1.5rem;
}

.contact-form label {
  display: grid;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: #86868b;
  font-weight: 500;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  border-radius: 12px;
  border: 1px solid #d2d2d7;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  background: #ffffff;
  color: #1d1d1f;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #1d1d1f;
  box-shadow: 0 0 0 4px rgba(29, 29, 31, 0.08);
  transform: translateY(-1px);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.contact-form button {
  justify-self: start;
  cursor: pointer;
  margin-top: 0.5rem;
  font-family: inherit;
}

/* Footer */
.site-footer {
  padding: 5rem 0 3rem;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  background: #ffffff;
}

.footer-content {
  text-align: center;
  display: grid;
  gap: 2rem;
}

.company-info {
  color: #86868b;
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 auto;
  max-width: 600px;
}

.company-info p {
  margin: 0.5rem 0;
}

.company-info a {
  color: #1d1d1f;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
}

.company-info a:hover {
  color: #333333;
  text-decoration: underline;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 0 auto;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  background: rgba(29, 29, 31, 0.05);
  border-radius: 12px;
  text-decoration: none;
  color: #1d1d1f;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.social-link:hover {
  background: rgba(29, 29, 31, 0.1);
  border-color: rgba(29, 29, 31, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.social-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.social-text {
  font-size: 0.95rem;
}

/* Responsive design for social links */
@media (max-width: 480px) {
  .social-links {
    flex-direction: column;
    align-items: center;
  }
  
  .social-link {
    width: 200px;
    justify-content: center;
  }
}

.footer-content .logo {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.footer-content > p {
  color: #86868b;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.footer-meta {
  font-size: 0.9rem;
  color: #86868b;
  margin-top: 2rem;
}

.footer-divider {
  width: 80px;
  height: 1px;
  background-color: #d2d2d7;
  margin: 1rem auto 1.5rem;
  opacity: 0.6;
}

.land-acknowledgement {
  font-size: 0.9rem;
  color: #86868b;
  line-height: 1.7;
  text-align: center;
  opacity: 0.8;
  max-width: 800px;
  margin: 0 auto;
}

/* Thank you page card override */
.thankyou-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards;
}

.thankyou-card h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1d1d1f;
}

.thankyou-card .subtext {
  color: #86868b;
  font-size: 1.125rem;
  line-height: 1.7;
  max-width: 500px;
}

.thankyou-card .button {
  margin-top: 1rem;
}

/* Animations */
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scroll animations */
.fade-in-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll animations - left to right */
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scroll animations - right to left */
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    gap: 1.5rem;
    font-size: 0.9rem;
  }

  .nav-links .cta {
    padding: 0.65rem 1.5rem;
    font-size: 0.9rem;
  }

  .hero {
    padding: 6rem 0 5rem;
  }

  .hero-content {
    gap: 3rem;
  }

  .hero-text h1 {
    font-size: clamp(2.5rem, 6vw, 3rem);
  }

  .glass-card {
    padding: 2rem;
  }

  .services {
    padding: 6rem 0;
  }

  .section-header {
    margin-bottom: 3.5rem;
  }

  .service-grid {
    gap: 1.5rem;
  }

  .card {
    padding: 2rem;
  }

  .approach {
    padding: 7rem 0;
  }

  .split {
    gap: 4rem;
  }

  .cases {
    padding: 6rem 0;
  }

  .case-grid {
    gap: 1.5rem;
  }

  .case-card {
    padding: 2rem;
  }

  .assurance {
    padding: 7rem 0;
  }

  .assurance-content {
    gap: 4rem;
  }

  .metrics {
    gap: 2rem;
  }

  .metric-value {
    font-size: 2.5rem;
  }

  .contact {
    padding: 7rem 0;
  }

  .contact-card {
    padding: 2.5rem;
    gap: 3rem;
  }

  .site-footer {
    padding: 4rem 0 2rem;
  }
}

@media (max-width: 480px) {
  .header-content {
    padding: 1.25rem 0;
  }

  .nav-links {
    gap: 1rem;
  }

  .nav-links a:not(.cta) {
    display: none;
  }

  .hero {
    padding: 5rem 0 4rem;
  }

  .hero-text h1 {
    font-size: clamp(2rem, 6vw, 2.5rem);
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .glass-card {
    padding: 1.75rem;
  }

  .services {
    padding: 5rem 0;
  }

  .section-header h2 {
    font-size: clamp(2rem, 5vw, 2.5rem);
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .approach {
    padding: 6rem 0;
  }

  .split {
    gap: 3rem;
  }

  .cases {
    padding: 5rem 0;
  }

  .case-grid {
    grid-template-columns: 1fr;
  }

  .assurance {
    padding: 6rem 0;
  }

  .assurance-content {
    gap: 3rem;
  }

  .contact {
    padding: 6rem 0;
  }

  .contact-card {
    padding: 2rem;
    gap: 2.5rem;
  }

  .contact-form {
    gap: 1.25rem;
  }

  .contact-form input,
  .contact-form select,
  .contact-form textarea {
    padding: 0.9rem 1rem;
  }
}

/* Loading animation for form */
#status {
  margin-top: 1rem;
  color: #86868b;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

/* Hover effects for all interactive elements */
* {
  transition-property: background-color, border-color, color, fill, stroke, opacity, box-shadow, transform;
  transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
  transition-duration: 0.3s;
}