/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #374151;
  overflow-x: hidden;
}

html {
  scroll-behavior: smooth;
}

/* 主容器 */
#root {
  min-height: 100vh;
  background: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 50%, #d1d5db 100%);
  position: relative;
  overflow: hidden;
}

/* 液态流动动画 - 优化版本 */
@keyframes liquidFlow1 {
  0% { transform: translate(-100px, -100px) rotate(0deg) scale(1); opacity: 0.8; }
  12.5% { transform: translate(50px, -120px) rotate(45deg) scale(1.1); opacity: 0.9; }
  25% { transform: translate(100px, -50px) rotate(90deg) scale(1.2); opacity: 1; }
  37.5% { transform: translate(180px, 20px) rotate(135deg) scale(1.05); opacity: 0.95; }
  50% { transform: translate(200px, 100px) rotate(180deg) scale(0.8); opacity: 0.85; }
  62.5% { transform: translate(120px, 180px) rotate(225deg) scale(0.9); opacity: 0.9; }
  75% { transform: translate(-50px, 150px) rotate(270deg) scale(1.1); opacity: 1; }
  87.5% { transform: translate(-120px, 50px) rotate(315deg) scale(1.05); opacity: 0.95; }
  100% { transform: translate(-100px, -100px) rotate(360deg) scale(1); opacity: 0.8; }
}

@keyframes liquidFlow2 {
  0% { transform: translate(200px, 200px) rotate(0deg) scale(0.8); opacity: 0.7; }
  16.67% { transform: translate(80px, 180px) rotate(60deg) scale(1.1); opacity: 0.85; }
  33.33% { transform: translate(-100px, 100px) rotate(120deg) scale(1.3); opacity: 1; }
  50% { transform: translate(-80px, -20px) rotate(180deg) scale(1.05); opacity: 0.9; }
  66.67% { transform: translate(150px, -100px) rotate(240deg) scale(0.9); opacity: 0.8; }
  83.33% { transform: translate(220px, 50px) rotate(300deg) scale(1.15); opacity: 0.95; }
  100% { transform: translate(200px, 200px) rotate(360deg) scale(0.8); opacity: 0.7; }
}

@keyframes liquidFlow3 {
  0% { transform: translate(0px, 100px) rotate(0deg) scale(1.1); opacity: 0.9; }
  10% { transform: translate(80px, 60px) rotate(36deg) scale(0.95); opacity: 0.85; }
  20% { transform: translate(150px, -50px) rotate(72deg) scale(0.7); opacity: 0.8; }
  30% { transform: translate(100px, -120px) rotate(108deg) scale(1.2); opacity: 1; }
  40% { transform: translate(-100px, -100px) rotate(144deg) scale(1.4); opacity: 1; }
  50% { transform: translate(-180px, -20px) rotate(180deg) scale(1.1); opacity: 0.9; }
  60% { transform: translate(-150px, 50px) rotate(216deg) scale(0.9); opacity: 0.85; }
  70% { transform: translate(-80px, 120px) rotate(252deg) scale(1.05); opacity: 0.9; }
  80% { transform: translate(50px, 150px) rotate(288deg) scale(1.2); opacity: 1; }
  90% { transform: translate(120px, 130px) rotate(324deg) scale(1.15); opacity: 0.95; }
  100% { transform: translate(0px, 100px) rotate(360deg) scale(1.1); opacity: 0.9; }
}

@keyframes wave {
  0% { transform: translateX(-100%) skewX(0deg) scaleY(1); opacity: 0.3; }
  25% { transform: translateX(-50%) skewX(2deg) scaleY(1.1); opacity: 0.5; }
  50% { transform: translateX(0%) skewX(5deg) scaleY(1.2); opacity: 0.7; }
  75% { transform: translateX(50%) skewX(3deg) scaleY(1.1); opacity: 0.5; }
  100% { transform: translateX(100%) skewX(0deg) scaleY(1); opacity: 0.3; }
}

@keyframes ripple {
  0% { transform: scale(0.8) rotate(0deg); opacity: 0.7; }
  25% { transform: scale(1.0) rotate(90deg); opacity: 0.5; }
  50% { transform: scale(1.2) rotate(180deg); opacity: 0.3; }
  75% { transform: scale(1.0) rotate(270deg); opacity: 0.5; }
  100% { transform: scale(0.8) rotate(360deg); opacity: 0.7; }
}

@keyframes flowPath {
  0% { transform: translateY(-50px) scaleY(0.8); opacity: 0.5; }
  25% { transform: translateY(-25px) scaleY(1.1); opacity: 0.8; }
  50% { transform: translateY(0px) scaleY(1.3); opacity: 1; }
  75% { transform: translateY(25px) scaleY(1.1); opacity: 0.8; }
  100% { transform: translateY(50px) scaleY(0.8); opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

@keyframes floatUpDown {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes liquidFlow4 {
  0% { transform: translate(-150px, 50px) rotate(0deg) scale(0.9); opacity: 0.6; }
  20% { transform: translate(100px, -80px) rotate(72deg) scale(1.3); opacity: 0.9; }
  40% { transform: translate(250px, 120px) rotate(144deg) scale(0.7); opacity: 0.8; }
  60% { transform: translate(-50px, 200px) rotate(216deg) scale(1.1); opacity: 1; }
  80% { transform: translate(-200px, -30px) rotate(288deg) scale(1.4); opacity: 0.9; }
  100% { transform: translate(-150px, 50px) rotate(360deg) scale(0.9); opacity: 0.6; }
}

@keyframes liquidFlow5 {
  0% { transform: translate(300px, -50px) rotate(0deg) scale(1.2); opacity: 0.7; }
  25% { transform: translate(-100px, 150px) rotate(90deg) scale(0.8); opacity: 0.9; }
  50% { transform: translate(150px, 300px) rotate(180deg) scale(1.5); opacity: 1; }
  75% { transform: translate(400px, 100px) rotate(270deg) scale(0.6); opacity: 0.8; }
  100% { transform: translate(300px, -50px) rotate(360deg) scale(1.2); opacity: 0.7; }
}

@keyframes spiralFlow {
  0% { transform: translate(0px, 0px) rotate(0deg) scale(1); opacity: 0.5; }
  25% { transform: translate(50px, -50px) rotate(90deg) scale(1.2); opacity: 0.8; }
  50% { transform: translate(0px, -100px) rotate(180deg) scale(0.8); opacity: 1; }
  75% { transform: translate(-50px, -50px) rotate(270deg) scale(1.1); opacity: 0.8; }
  100% { transform: translate(0px, 0px) rotate(360deg) scale(1); opacity: 0.5; }
}

@keyframes morphing {
  0% { border-radius: 50%; transform: scale(1) rotate(0deg); }
  25% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; transform: scale(1.1) rotate(90deg); }
  50% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; transform: scale(0.9) rotate(180deg); }
  75% { border-radius: 40% 60% 60% 40% / 60% 40% 60% 40%; transform: scale(1.2) rotate(270deg); }
  100% { border-radius: 50%; transform: scale(1) rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 背景装饰 */
.background-decorations {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* 液态流动动画类 - 添加初始状态和延迟 */
.liquid-flow-1 {
  animation: liquidFlow1 20s infinite cubic-bezier(0.4, 0, 0.6, 1);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.liquid-flow-2 {
  animation: liquidFlow2 25s infinite cubic-bezier(0.25, 0.46, 0.45, 0.94);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.liquid-flow-3 {
  animation: liquidFlow3 18s infinite cubic-bezier(0.165, 0.84, 0.44, 1);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.wave-animation {
  animation: wave 15s infinite cubic-bezier(0.4, 0, 0.6, 1);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.ripple-animation {
  animation: ripple 12s infinite cubic-bezier(0.25, 0.46, 0.45, 0.94);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.flow-path-animation {
  animation: flowPath 16s infinite cubic-bezier(0.165, 0.84, 0.44, 1);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.liquid-flow-4 {
  animation: liquidFlow4 22s infinite cubic-bezier(0.68, -0.55, 0.265, 1.55);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.liquid-flow-5 {
  animation: liquidFlow5 28s infinite cubic-bezier(0.175, 0.885, 0.32, 1.275);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.spiral-flow {
  animation: spiralFlow 14s infinite cubic-bezier(0.4, 0, 0.2, 1);
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, opacity;
  opacity: 0;
}

.morphing-blob {
  animation: morphing 20s infinite ease-in-out;
  animation-fill-mode: both;
  animation-play-state: paused;
  will-change: transform, border-radius;
  opacity: 0;
}

/* 页面加载后启动动画 */
.animations-ready .liquid-flow-1,
.animations-ready .liquid-flow-2,
.animations-ready .liquid-flow-3,
.animations-ready .liquid-flow-4,
.animations-ready .liquid-flow-5,
.animations-ready .wave-animation,
.animations-ready .ripple-animation,
.animations-ready .flow-path-animation,
.animations-ready .spiral-flow,
.animations-ready .morphing-blob {
  animation-play-state: running;
}

.floating-particles {
  position: absolute;
  width: 100%;
  height: 100%;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(55, 65, 81, 0.3);
  border-radius: 50%;
  animation: float 6s infinite ease-in-out;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; animation-delay: 1s; }
.particle:nth-child(3) { left: 30%; animation-delay: 2s; }
.particle:nth-child(4) { left: 40%; animation-delay: 3s; }
.particle:nth-child(5) { left: 50%; animation-delay: 4s; }
.particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.particle:nth-child(7) { left: 70%; animation-delay: 0.5s; }
.particle:nth-child(8) { left: 80%; animation-delay: 1.5s; }
.particle:nth-child(9) { left: 90%; animation-delay: 2.5s; }
.particle:nth-child(10) { left: 95%; animation-delay: 3.5s; }

/* 导航栏 */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: none;
  background: transparent;
  border-bottom: none;
  transition: all 0.3s ease;
}

header.scrolled {
  backdrop-filter: blur(25px);
  background: rgba(255, 255, 255, 0.3);
  border-bottom: 2px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: #1f2937;
  text-decoration: none;
  transition: all 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo img {
  height: 2.5rem;
  width: auto;
  max-width: 400px;
  object-fit: contain;
  transition: all 0.3s ease;
}

.logo img:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1rem;
  align-items: center;
}

.nav-links a {
  color: #4b5563;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  position: relative;
}

.nav-links a:hover {
  color: #1f2937;
  background: rgba(255, 255, 255, 0.2);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #1f2937, #374151);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-links a:hover::after {
  width: 80%;
}

.language-toggle {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #4b5563;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.language-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  color: #4b5563;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
}

.mobile-menu-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(25px);
  border-bottom: 2px solid rgba(255, 255, 255, 0.4);
  padding: 1rem;
  animation: fadeInUp 0.3s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  z-index: 1000;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu .nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
}

.mobile-menu .nav-links a {
  text-align: center;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 0.5rem;
  color: #374151;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.mobile-menu .nav-links a:hover {
  background: rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mobile-menu .language-toggle {
  margin-top: 0.5rem;
  justify-content: center;
}

/* 主要内容 */
main {
  padding-top: 1rem;
}

/* Hero 部分 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  position: relative;
}

.hero-content {
  max-width: 1400px;
  z-index: 10;
  position: relative;
  animation: fadeInUp 1s ease;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(15px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  padding: 0.5rem 1.5rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #374151;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  margin-bottom: 2rem;
  animation: slideInLeft 1s ease 0.2s both, floatUpDown 3s ease-in-out infinite 1.2s;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: #1f2937;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero .highlight {
  background: linear-gradient(135deg, #1f2937, #374151);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero .subtitle {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 600;
  color: #4b5563;
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease 0.6s both;
}

.hero p {
  font-size: 1.25rem;
  color: #6b7280;
  margin-bottom: 1.5rem;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease 0.8s both;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 1s both;
}

.btn {
  padding: 1rem 2rem;
  border-radius: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, #1f2937, #000000);
  color: white;
  box-shadow: 0 4px 15px rgba(31, 41, 55, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(31, 41, 55, 0.4);
  background: linear-gradient(135deg, #374151, #1f2937);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #374151;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}



.feature-card {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.feature-card:hover::before {
  left: 100%;
}

.feature-card:hover {
  transform: translateY(-12px) scale(1.05);
  background: rgba(255, 255, 255, 0.35);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.feature-icon {
  width: 4rem;
  height: 4rem;
  background: linear-gradient(135deg, #1f2937, #000000);
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
  box-shadow: 0 8px 20px rgba(31, 41, 55, 0.3);
}

.feature-icon svg {
  width: 2rem;
  height: 2rem;
  color: white;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 1rem;
}

.feature-card p {
  color: #6b7280;
  line-height: 1.6;
}

/* 名人名言部分 */
.quote-section {
  padding: 3rem 2rem;
  background: transparent;
  max-width: 1280px;
  margin: 0 auto;
}

.quote-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 1rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  transition: all 0.5s ease;
}

.quote-container:hover {
  transform: scale(1.02);
  background: rgba(255, 255, 255, 0.35);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.quote-avatar {
  flex-shrink: 0;
}

.avatar-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 3px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 8px 20px rgba(31, 41, 55, 0.2);
  transition: all 0.3s ease;
  background: #f8f9fa;
}

.avatar-image:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 30px rgba(31, 41, 55, 0.3);
}

.quote-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.quote-text {
  font-size: 1.25rem;
  line-height: 1.7;
  color: #1f2937;
  font-style: italic;
  margin: 0 0 1rem 0;
  position: relative;
  padding-left: 2rem;
}

.quote-text::before {
  content: '"';
  position: absolute;
  left: 0;
  top: -0.2rem;
  font-size: 3rem;
  color: #6b7280;
  font-family: serif;
  line-height: 1;
}

.quote-text::after {
  content: '"';
  font-size: 3rem;
  color: #6b7280;
  font-family: serif;
  margin-left: 0.2rem;
  line-height: 1;
}

.quote-author {
  font-size: 1rem;
  color: #6b7280;
  font-weight: 600;
  font-style: normal;
  align-self: flex-end;
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .quote-section {
    padding: 2rem 1rem;
  }
  
  .quote-container {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
    padding: 1rem;
  }
  
  .quote-text {
    font-size: 1.1rem;
    padding-left: 1.5rem;
  }
  
  .quote-text::before {
    font-size: 2.5rem;
  }
}

/* 关于我们部分 */
.about {
  padding: 3rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 1.5rem;
}

.about-content p {
  font-size: 1.125rem;
  color: #6b7280;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.about-image {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.5s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.about-image:hover {
  transform: scale(1.05);
  background: rgba(255, 255, 255, 0.35);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.about-image-content {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, rgba(243, 244, 246, 0.6), rgba(229, 231, 235, 0.6));
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.about-image-inner {
  text-align: center;
}

.about-image-icon {
  width: 5rem;
  height: 5rem;
  background: linear-gradient(135deg, #1f2937, #000000);
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(31, 41, 55, 0.2);
}

.about-image-icon:hover {
  transform: scale(1.1);
}

.about-image-icon svg {
  width: 2.5rem;
  height: 2.5rem;
  color: white;
}

.about-image p {
  color: #6b7280;
  font-size: 1.125rem;
  transform: translateY(0.5rem);
  position: relative;
  z-index: 10;
}

/* 开源项目部分 */
.projects {
  padding: 2rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
}

.projects-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.projects-title-section {
  flex: 1;
  max-width: 1200px;
  text-align: center;
}

.mobile-carousel-controls {
  display: none;
  gap: 2rem;
  align-items: center;
  justify-content: center;
}

.projects h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 0.5rem;
}

.projects .subtitle {
  font-size: 1.25rem;
  color: #6b7280;
  margin: 0;
}

.projects-carousel {
  width: 100%;
  max-width: 1400px;
  margin: 1.5rem auto 0;
  padding: 0 2rem;
}

.carousel-container {
  position: relative;
  padding: 2rem 0;
}

.carousel-track {
  width: 100%;
}

.projects-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  min-height: 320px;
  padding: 0 1rem;
}

.main-project {
  flex: 0 0 auto;
  z-index: 3;
}

.side-project {
  flex: 0 0 auto;
  z-index: 1;
  opacity: 0.6;
  transform: scale(0.8);
  transition: all 0.3s ease;
}

.side-project:hover {
  opacity: 0.9;
  transform: scale(0.85);
}

.far-left-project,
.far-right-project {
  opacity: 0.4;
  transform: scale(0.6);
  z-index: 0;
}

.far-left-project:hover,
.far-right-project:hover {
  opacity: 0.7;
  transform: scale(0.65);
}

@media (max-width: 768px) {
  .projects-header {
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
  }
  
  .projects-title-section {
    order: 1;
    margin-bottom: 0;
  }
  
  .projects-header > .carousel-btn {
    display: none;
  }
  
  .mobile-carousel-controls {
    display: flex;
    order: 2;
  }
  
  .projects-layout {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .side-project {
    transform: scale(0.95);
    opacity: 0.8;
  }
  
  .side-project:hover {
    transform: scale(1);
  }
  
  .far-left-project,
  .far-right-project {
    transform: scale(0.85);
    opacity: 0.6;
  }
  
  .far-left-project:hover,
  .far-right-project:hover {
    transform: scale(0.9);
    opacity: 0.8;
  }
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.carousel-btn {
  background: rgba(31, 41, 55, 0.1);
  border: 1px solid rgba(31, 41, 55, 0.2);
  color: #1f2937;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.carousel-btn:hover {
  background: rgba(31, 41, 55, 0.2);
  transform: scale(1.1);
}

.carousel-dots {
  display: flex;
  gap: 0.5rem;
}

.carousel-dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: all 0.3s ease;
}

.carousel-dot.active {
  background: #1f2937;
  transform: scale(1.2);
}

.carousel-dot:hover {
  background: rgba(31, 41, 55, 0.7);
}

.project-card {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.5s ease;
  position: relative;
  overflow: visible;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.project-card.large {
  width: 380px;
  min-height: 300px;
  padding: 2.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.project-card.small {
  width: 260px;
  min-height: 260px;
  padding: 1.5rem;
}

.project-card.small .project-title {
  font-size: 1.1rem;
}

.project-card.small .project-description {
  font-size: 0.9rem;
  line-height: 1.5;
}

.project-card.small .project-icon {
  width: 2.5rem;
  height: 2.5rem;
}

.project-card.small .project-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.project-card.extra-small {
  width: 200px;
  min-height: 220px;
  padding: 1rem;
}

.project-card.extra-small .project-title {
  font-size: 1rem;
}

.project-card.extra-small .project-description {
  font-size: 0.8rem;
  line-height: 1.4;
}

.project-card.extra-small .project-icon {
  width: 2rem;
  height: 2rem;
}

.project-card.extra-small .project-icon svg {
  width: 1rem;
  height: 1rem;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: 1rem;
}

.project-card:hover::before {
  opacity: 1;
}

.project-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: rgba(255, 255, 255, 0.35);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.project-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.project-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

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

.project-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: white;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  text-align: left;
}

.project-description {
  color: #6b7280;
  line-height: 1.6;
  margin-bottom: 1rem;
  text-align: left;
}

.project-language {
  display: inline-block;
  background: rgba(31, 41, 55, 0.1);
  color: #374151;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

/* 生态社区部分（整合到关于我们） */
.community-section {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.community-section h3 {
  text-align: center;
  margin-bottom: 1rem;
  font-size: 2rem;
  font-weight: 700;
  color: #1f2937;
}

.community-section .subtitle {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 1.1rem;
  color: #6b7280;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}



.community-layout {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
  max-width: 1200px;
  margin: 0 auto;
}

/* 平板设备2列显示 */
@media (max-width: 1024px) {
  .community-layout {
    grid-template-columns: repeat(2, 1fr);
    max-width: 800px;
  }
}

.community-card {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.5s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  position: relative;
  overflow: hidden;
  width: 100%;
  opacity: 1;
  transform: none;
}

.community-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient);
  opacity: 0.1;
  border-radius: inherit;
  transition: opacity 0.3s ease;
}

.community-card:hover::before {
  opacity: 0.2;
}

.community-card:hover {
  background: rgba(255, 255, 255, 0.35);
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.community-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.community-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.community-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  text-align: left;
  margin: 0;
}

.community-description {
  color: #6b7280;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  text-align: left;
}

.community-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.community-members {
  font-weight: 600;
  color: #1f2937;
  font-size: 0.875rem;
}

.community-type {
  background: rgba(31, 41, 55, 0.1);
  color: #374151;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 500;
}

.community-join-btn {
  width: 100%;
  background: var(--gradient);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 1rem;
}

.community-join-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}



/* 联系我们部分 */
.contact {
  padding: 3rem 2rem;
  max-width: 1024px;
  margin: 0 auto;
  text-align: center;
}

.contact h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 1.5rem;
}

.contact .subtitle {
  font-size: 1.25rem;
  color: #6b7280;
  margin-bottom: 2rem;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.contact-card {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 1rem;
  padding: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
  transition: all 0.5s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.contact-card:hover {
  background: rgba(255, 255, 255, 0.35);
  transform: scale(1.05);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.contact-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 80px;
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: scale(1.05);
}

.contact-item h3 {
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.5rem;
}

.contact-item p {
  color: #6b7280;
}

/* 页脚 */
footer {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(25px);
  border-top: 2px solid rgba(255, 255, 255, 0.4);
  padding: 3rem 2rem;
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
}

.acknowledgments {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.acknowledgments h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 1rem;
  text-align: center;
}

.acknowledgments .subtitle {
  color: #6b7280;
  margin-bottom: 1.5rem;
  text-align: center;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.partner-card {
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 0.5rem;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  backdrop-filter: blur(15px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.partner-card:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.partner-logo {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.partner-card:hover .partner-logo {
  transform: scale(1.1);
}

.partner-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0);
  transition: all 0.3s ease;
}

.partner-card:hover .partner-logo img {
  filter: brightness(1);
}

.partner-name {
  font-size: 0.875rem;
  color: #4b5563;
  font-weight: 500;
  line-height: 1.3;
}

.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.footer-brand img {
  height: 2.5rem;
  width: auto;
  max-width: 400px;
  object-fit: contain;
  transition: all 0.3s ease;
}

.footer-brand img:hover {
  transform: scale(1.05);
}

.footer-description {
  color: #6b7280;
  margin-bottom: 1rem;
  max-width: 400px;
}

.footer-section h3 {
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #6b7280;
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 0.5rem;
  border-radius: 0.25rem;
  display: inline-block;
}

.footer-links a:hover {
  color: #1f2937;
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  padding-top: 2rem;
  text-align: center;
  color: #6b7280;
}

.social-links {
  display: flex;
  justify-content: flex-start;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: #6b7280;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
  color: #1f2937;
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.social-link svg {
  width: 24px;
  height: 24px;
  transition: all 0.3s ease;
}

.social-link:hover svg {
  transform: scale(1.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
  /* 导航栏优化 */
  nav {
    padding: 0.25rem 1rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .mobile-menu-button {
    display: block;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .logo img {
    height: 2rem;
  }
  
  /* 主要内容区域 */
  main {
    padding-top: 0.5rem;
  }
  
  /* Hero部分优化 */
  .hero {
    padding: 1rem 0.5rem;
    min-height: 85vh;
  }
  
  .hero-content {
    max-width: 100%;
    padding: 0 1rem;
  }
  
  .hero h1 {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
    margin-bottom: 1rem;
  }
  
  .hero .subtitle {
    font-size: clamp(1.2rem, 6vw, 1.8rem);
    margin-bottom: 1rem;
  }
  
  .hero p {
    font-size: 1rem;
    margin-bottom: 2rem;
  }
  
  .hero-badge {
    font-size: 0.75rem;
    padding: 0.4rem 1rem;
    margin-bottom: 1.5rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
  
  /* 其他部分 */
  .features {
    padding: 3rem 1rem;
  }
  

  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-info {
    grid-template-columns: 1fr;
  }
  
  .social-links {
    gap: 1rem;
  }
  
  .social-link {
    width: 40px;
    height: 40px;
  }
  
  .social-link svg {
    width: 20px;
    height: 20px;
  }
  

  
  .carousel-controls {
    margin-top: 2rem;
  }
  
  .carousel-btn {
      width: 40px;
      height: 40px;
    }
    
  /* 生态社区移动端优化 */
  .community-section {
    margin-top: 2rem;
    padding-top: 2rem;
  }
  
  .community-section h3 {
    font-size: 1.5rem;
  }
  
  .community-layout {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 1rem 0;
    max-width: 100%;
  }
  
  .community-card {
    padding: 1.5rem;
  }
  


  
  .footer-main {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-brand img {
    height: 2rem;
  }
}

@media (max-width: 480px) {
  /* 超小屏幕优化 */
  nav {
    padding: 0.25rem 0.75rem;
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  .logo img {
    height: 1.5rem;
  }
  
  /* 生态社区超小屏幕单列显示 */
  .community-layout {
    grid-template-columns: 1fr;
  }
  
  .hero {
    padding: 0.75rem 0.25rem;
    min-height: 90vh;
  }
  
  .hero-content {
    padding: 0 0.5rem;
  }
  
  .hero h1 {
    font-size: clamp(1.5rem, 10vw, 2rem);
    margin-bottom: 0.75rem;
  }
  
  .hero .subtitle {
    font-size: clamp(1rem, 8vw, 1.5rem);
    margin-bottom: 0.75rem;
  }
  
  .hero p {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
  }
  
  .hero-badge {
    font-size: 0.7rem;
    padding: 0.3rem 0.8rem;
    margin-bottom: 1rem;
  }
  
  .hero-buttons {
    gap: 0.5rem;
    width: 100%;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    width: 100%;
    max-width: 280px;
  }
  
  .features {
    padding: 2rem 0.5rem;
  }
  
  .feature-card {
    padding: 1.5rem 1rem;
  }
  
  .partners-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .footer {
    padding: 2rem 0.5rem;
  }
  
  .footer-brand img {
    height: 1.5rem;
  }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
  background: rgba(31, 41, 55, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(31, 41, 55, 0.5);
}

/* 选择文本样式 */
::selection {
  background: rgba(31, 41, 55, 0.2);
  color: #1f2937;
}

/* 焦点样式 */
.btn:focus,
.language-toggle:focus,
.nav-links a:focus {
  outline: 2px solid #1f2937;
  outline-offset: 2px;
}

/* 加载动画 */
.loading {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

/* 工具提示 */
[data-tooltip] {
  position: relative;
}

[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.875rem;
  white-space: nowrap;
  z-index: 1000;
  animation: fadeInUp 0.2s ease;
}

/* 可访问性改进 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  .feature-card,
  .project-card,
  .contact-card,
  .partner-card {
    border: 2px solid #1f2937;
  }
  
  .btn-primary {
    background: #000000;
  }
  
  .btn-secondary {
    background: #ffffff;
    color: #000000;
    border: 2px solid #000000;
  }
}