/* ============================
   金享云官网 - 全局样式
   主题：蓝金渐变 + 科技感
   ============================ */

/* CSS变量定义 */
:root {
  /* 主色调 */
  --primary-blue: #1890ff;
  --primary-cyan: #00d4ff;
  --primary-gold: #ffd700;
  --primary-gradient: linear-gradient(135deg, #1890ff 0%, #00d4ff 100%);

  /* 背景色 */
  --bg-dark: #0a0e17;
  --bg-darker: #050810;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);

  /* 文字色 */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);

  /* 边框 */
  --border-light: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(24, 144, 255, 0.3);

  /* 阴影 */
  --shadow-glow: 0 0 40px rgba(24, 144, 255, 0.2);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);

  /* 间距 */
  --section-padding: 100px 0;
  --container-padding: 0 20px;

  /* 动画 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family:
    "Noto Sans SC",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--container-padding);
}

/* ============================
   导航栏
   ============================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 15px 0;
  transition: var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition-normal);
}

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

/* 导航链接选中状态 */
.nav-links a.active {
  color: var(--text-primary);
}

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

.btn-nav {
  padding: 10px 24px !important;
  background: var(--primary-gradient);
  border-radius: 25px;
  color: white !important;
}

.btn-nav::after {
  display: none !important;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-normal);
}

/* ============================
   Hero区域
   ============================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#particleCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 20px;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 900;
  margin-bottom: 20px;
  letter-spacing: 0.1em;
}

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-slogan {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 300;
  color: var(--primary-gold);
  margin-bottom: 30px;
  letter-spacing: 0.3em;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 500;
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 20px rgba(24, 144, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(24, 144, 255, 0.5);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  border-color: var(--primary-blue);
  background: rgba(24, 144, 255, 0.1);
}

.btn-block {
  width: 100%;
}

/* 滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  animation: bounce 2s infinite;
}

.mouse {
  width: 26px;
  height: 40px;
  border: 2px solid var(--text-secondary);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.wheel {
  width: 4px;
  height: 8px;
  background: var(--text-secondary);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

.scroll-indicator span {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

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

@keyframes scroll {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(10px);
  }
}

/* ============================
   通用区块头部
   ============================ */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header.light {
  color: white;
}

.section-tag {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(24, 144, 255, 0.15);
  border: 1px solid rgba(24, 144, 255, 0.3);
  border-radius: 20px;
  font-size: 14px;
  color: var(--primary-cyan);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 15px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================
   愿景定位
   ============================ */
.vision {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.vision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.vision-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition-normal);
}

.vision-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-5px);
}

.vision-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 25px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vision-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.vision-card h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.vision-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================
   核心业务
   ============================ */
.business {
  padding: var(--section-padding);
  background: var(--bg-darker);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.business-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 40px;
  overflow: hidden;
  transition: var(--transition-normal);
}

.business-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-5px);
}

.card-glow {
  position: absolute;
  top: -100px;
  right: -100px;
  width: 200px;
  height: 200px;
  background: radial-gradient(
    circle,
    rgba(24, 144, 255, 0.15) 0%,
    transparent 70%
  );
  transition: var(--transition-slow);
}

.business-card:hover .card-glow {
  transform: scale(1.5);
}

.card-number {
  font-size: 4rem;
  font-weight: 900;
  background: linear-gradient(
    135deg,
    rgba(24, 144, 255, 0.3) 0%,
    rgba(0, 212, 255, 0.1) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: absolute;
  top: 20px;
  right: 30px;
}

.business-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.business-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.card-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.card-features li {
  padding: 6px 14px;
  background: rgba(24, 144, 255, 0.1);
  border: 1px solid rgba(24, 144, 255, 0.2);
  border-radius: 15px;
  font-size: 0.85rem;
  color: var(--primary-cyan);
}

/* ============================
   技术创新
   ============================ */
.tech {
  padding: var(--section-padding);
  background: var(--bg-dark);
}

.tech-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.tech-text .section-tag {
  margin-bottom: 20px;
}

.tech-text h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.3;
  margin-bottom: 20px;
}

.tech-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.tech-stats {
  display: flex;
  gap: 40px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-unit {
  font-size: 1.5rem;
  color: var(--primary-cyan);
}

.stat-label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 5px;
}

/* 技术球体动画 */
.tech-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.tech-sphere {
  position: relative;
  width: 300px;
  height: 300px;
}

.sphere-ring {
  position: absolute;
  border: 2px solid rgba(24, 144, 255, 0.3);
  border-radius: 50%;
  animation: rotate 20s linear infinite;
}

.ring-1 {
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

.ring-2 {
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
  animation-direction: reverse;
  animation-duration: 15s;
}

.ring-3 {
  width: 60%;
  height: 60%;
  top: 20%;
  left: 20%;
  animation-duration: 10s;
}

.sphere-core {
  position: absolute;
  width: 100px;
  height: 100px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  box-shadow: 0 0 50px rgba(24, 144, 255, 0.5);
}

.sphere-node {
  position: absolute;
  padding: 8px 16px;
  background: rgba(24, 144, 255, 0.2);
  border: 1px solid var(--primary-blue);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--primary-cyan);
  white-space: nowrap;
}

.node-1 {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}
.node-2 {
  bottom: 20%;
  right: 0;
}
.node-3 {
  bottom: 20%;
  left: 0;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ============================
   发展目标
   ============================ */
.goals {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-blue), var(--primary-cyan));
}

.timeline-item {
  display: flex;
  gap: 40px;
  margin-bottom: 50px;
  position: relative;
}

.timeline-marker {
  width: 100px;
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.timeline-stage {
  display: inline-block;
  padding: 10px 20px;
  background: var(--primary-gradient);
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 30px;
  flex: 1;
  transition: var(--transition-normal);
}

.timeline-content:hover {
  border-color: var(--border-glow);
}

.timeline-content h3 {
  font-size: 1.4rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.timeline-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
  line-height: 1.7;
}

.timeline-highlight {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.timeline-highlight span {
  padding: 6px 14px;
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: 15px;
  font-size: 0.85rem;
  color: var(--primary-gold);
}

/* ============================
   生态共建
   ============================ */
.ecosystem {
  padding: var(--section-padding);
  background: var(--bg-dark);
}

.ecosystem-content {
  position: relative;
  background: linear-gradient(
    135deg,
    rgba(24, 144, 255, 0.1) 0%,
    rgba(0, 212, 255, 0.05) 100%
  );
  border: 1px solid var(--border-glow);
  border-radius: 30px;
  padding: 80px 40px;
  overflow: hidden;
}

.ecosystem-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231890FF' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  z-index: 1;
}

.eco-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 30px 20px;
  text-align: center;
  transition: var(--transition-normal);
}

.eco-card:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.08);
}

.eco-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.eco-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.eco-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================
   联系我们
   ============================ */
.contact {
  padding: var(--section-padding);
  background: var(--bg-darker);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.info-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.info-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.info-text h4 {
  font-size: 1rem;
  margin-bottom: 5px;
  color: var(--text-primary);
}

.info-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  background: rgba(24, 144, 255, 0.05);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================
   Footer
   ============================ */
.footer {
  padding: 60px 0 30px;
  background: var(--bg-darker);
  border-top: 1px solid var(--border-light);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  height: 40px;
  margin-bottom: 15px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 80px;
}

.link-group h5 {
  font-size: 1rem;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.link-group a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.link-group a:hover {
  color: var(--primary-cyan);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-light);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* 备案信息样式 */
.beian-info {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.beian-info a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-muted);
  font-size: 12px;
  transition: var(--transition-fast);
}

.beian-info span {
  display: inline-flex;
  align-items: center;
}

.beian-info a:hover {
  color: var(--text-secondary);
}

.beian-info img {
  width: 14px;
  height: 14px;
}

/* ============================
   动画效果
   ============================ */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

[data-aos="fade-up"] {
  transform: translateY(30px);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
}

[data-aos="fade-left"] {
  transform: translateX(30px);
}

[data-aos="zoom-in"] {
  transform: scale(0.9);
}

[data-aos="flip-left"] {
  transform: perspective(2500px) rotateY(-100deg);
}

[data-aos].aos-animate[data-aos="flip-left"] {
  transform: perspective(2500px) rotateY(0);
}

/* ============================
   响应式设计 - 移动端适配
   ============================ */
@media (max-width: 1024px) {
  .vision-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tech-content {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .tech-visual {
    order: -1;
  }

  .tech-sphere {
    width: 250px;
    height: 250px;
  }

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

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  /* 导航栏移动端 */
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 30px 20px;
    gap: 20px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    border-bottom: 1px solid var(--border-light);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    font-size: 18px;
    padding: 10px 0;
  }

  .btn-nav {
    text-align: center;
  }

  /* Hero移动端 */
  .hero-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .scroll-indicator {
    display: none;
  }

  /* 卡片布局 */
  .vision-grid,
  .business-grid {
    grid-template-columns: 1fr;
  }

  .business-card {
    padding: 30px 25px;
  }

  .card-number {
    font-size: 3rem;
    top: 15px;
    right: 20px;
  }

  /* 技术统计 */
  .tech-stats {
    flex-direction: column;
    gap: 20px;
  }

  .stat-item {
    display: flex;
    align-items: baseline;
    gap: 10px;
  }

  .stat-number {
    font-size: 2.5rem;
  }

  /* 时间轴 */
  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    flex-direction: column;
    gap: 20px;
    padding-left: 50px;
  }

  .timeline-marker {
    position: absolute;
    left: 0;
    width: 40px;
  }

  .timeline-stage {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  /* 生态 */
  .ecosystem-content {
    padding: 50px 20px;
  }

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

  /* 联系 */
  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-form {
    padding: 30px 20px;
  }

  /* Footer */
  .footer-content {
    flex-direction: column;
    gap: 40px;
  }

  .footer-links {
    flex-direction: column;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-slogan {
    letter-spacing: 0.15em;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .vision-card,
  .business-card,
  .timeline-content {
    padding: 25px 20px;
  }

  .tech-sphere {
    width: 200px;
    height: 200px;
  }

  .sphere-core {
    width: 70px;
    height: 70px;
    font-size: 1.5rem;
  }

  .sphere-node {
    font-size: 0.75rem;
    padding: 6px 12px;
  }
}