/* 
  辽宁省雨滴互联科技有限公司 - 官方网站样式表
  设计风格: 赛博海洋 (Cyber-Ocean) 极客极简暗黑风 + 玻璃拟态 (Glassmorphism)
  开发: 技术总监 雨落倾城
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* --- 核心变量 & 设计系统 --- */
:root {
  --bg-darker: #03060f;
  --bg-dark: #070c1e;
  --bg-card: rgba(8, 14, 33, 0.45);
  --bg-nav: rgba(4, 7, 18, 0.7);
  
  /* 渐变与色彩 */
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-purple: #7f00ff;
  --accent-pink: #e100ff;
  
  --grad-primary: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  --grad-purple: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-pink) 100%);
  --grad-dark: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
  --grad-glow: radial-gradient(circle at 50% 50%, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
  
  /* 边框与阴影 */
  --border-light: rgba(255, 255, 255, 0.05);
  --border-hover: rgba(0, 242, 254, 0.3);
  --shadow-glow: 0 8px 32px 0 rgba(0, 242, 254, 0.08);
  --shadow-hover: 0 12px 40px 0 rgba(0, 242, 254, 0.2);
  
  /* 文字颜色 */
  --text-white: #ffffff;
  --text-bright: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dark: #475569;
  
  /* 动效 */
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- 全局重置 --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-darker);
  overflow-x: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-muted);
  line-height: 1.7;
  background: var(--grad-dark);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-white);
  font-weight: 700;
  line-height: 1.3;
}

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

/* --- 滚动条定制 --- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-darker);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  transition: var(--transition-fast);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}

/* --- 背景环境动效 --- */
#rain-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.4;
}

/* --- 容器布局 --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 2;
}

/* --- 玻璃拟态面板公用样式 --- */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  box-shadow: var(--shadow-glow);
  transition: var(--transition-smooth);
}

.glass-panel:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

/* --- 渐变文字 --- */
.gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.gradient-text-purple {
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* --- 按钮样式 --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 2rem;
  background: var(--grad-primary);
  color: var(--bg-darker);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  border-radius: 30px;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
  position: relative;
  overflow: hidden;
  z-index: 1;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--grad-purple);
  opacity: 0;
  transition: var(--transition-fast);
  z-index: -1;
}

.btn-primary:hover {
  color: var(--text-white);
  box-shadow: 0 6px 25px rgba(127, 0, 255, 0.4);
  transform: translateY(-2px);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 2rem;
  background: transparent;
  color: var(--text-white);
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  border: 1px solid var(--border-light);
  border-radius: 30px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.15);
  transform: translateY(-2px);
}

/* --- 头部与导航栏 --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  padding: 1.5rem 0;
}

header.scrolled {
  padding: 0.8rem 0;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Outfit', sans-serif;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-white);
}

.logo-icon {
  width: 32px;
  height: 32px;
  fill: url(#logo-grad);
  filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.6));
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-item a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  position: relative;
  padding: 0.5rem 0;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--text-white);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  transition: var(--transition-fast);
  border-radius: 2px;
}

.nav-item a:hover::after,
.nav-item.active a::after {
  width: 100%;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-white);
  transition: var(--transition-fast);
}

.nav-btn i {
  color: var(--accent-cyan);
}

.nav-btn:hover {
  background: var(--grad-primary);
  color: var(--bg-darker);
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-white);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 1001;
}

/* --- 英雄首屏区 (Hero Section) --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 8rem;
  position: relative;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: 15%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.08) 0%, rgba(127, 0, 255, 0.03) 50%, transparent 80%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  max-width: 650px;
  position: relative;
  z-index: 2;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(0, 242, 254, 0.05);
  border: 1px solid rgba(0, 242, 254, 0.15);
  border-radius: 20px;
  color: var(--accent-cyan);
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 550px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
}

.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-40%);
  width: 45%;
  max-width: 500px;
  height: auto;
  z-index: 2;
}

.hero-shapes {
  position: relative;
  width: 100%;
  height: 400px;
}

.shape-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse 4s infinite ease-in-out;
}

.shape-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(0deg);
  width: 340px;
  height: 340px;
  border: 1.5px dashed rgba(0, 242, 254, 0.2);
  border-radius: 50%;
  animation: rotateRing 20s linear infinite;
}

.shape-ring-2 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(0deg);
  width: 280px;
  height: 280px;
  border: 1px solid rgba(127, 0, 255, 0.15);
  border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
  animation: morphShape 8s ease-in-out infinite alternate;
}

.shape-node {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 15px var(--accent-cyan);
}

.node-1 { top: 15%; left: 30%; animation: floatNode 6s infinite ease-in-out; }
.node-2 { bottom: 20%; right: 25%; animation: floatNode 8s infinite ease-in-out 1s; }
.node-3 { top: 40%; right: 15%; animation: floatNode 7s infinite ease-in-out 2s; }

/* --- 公用部分标题 --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 5rem;
}

.section-tag {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  color: var(--accent-cyan);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* --- 核心宗旨区块 (Mission Section) --- */
.mission {
  padding: 8rem 0;
  position: relative;
}

.mission-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 5rem;
  align-items: center;
}

.mission-graphic {
  position: relative;
  padding: 2.5rem;
  border-radius: 28px;
  overflow: hidden;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mission-visual-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
}

.shield-icon {
  width: 100px;
  height: 100px;
  fill: url(#shield-grad);
  filter: drop-shadow(0 8px 25px rgba(0, 242, 254, 0.35));
  margin-bottom: 1.5rem;
  animation: floatNode 5s infinite ease-in-out;
}

.mission-tech-label {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-white);
  text-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.mission-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.mission-lead {
  font-size: 1.4rem;
  color: var(--text-white);
  font-weight: 600;
  line-height: 1.5;
}

.mission-detail {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.mission-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.stat-item {
  padding: 1.25rem 1rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: 16px;
}

.stat-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- 服务项目区块 (Services Section) --- */
.services {
  padding: 8rem 0;
  position: relative;
  background: radial-gradient(circle at 50% 100%, rgba(127, 0, 255, 0.03) 0%, transparent 60%);
}

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

.service-card {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 0% 0%, rgba(0, 242, 254, 0.08) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
}

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

.service-icon-wrapper {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 242, 254, 0.05);
  border: 1px solid rgba(0, 242, 254, 0.15);
  border-radius: 16px;
  margin-bottom: 0.5rem;
  transition: var(--transition-fast);
}

.service-card:hover .service-icon-wrapper {
  background: var(--accent-cyan);
  color: var(--bg-darker);
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
}

.service-icon-wrapper svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 1.75;
  transition: var(--transition-fast);
}

.service-card:hover .service-icon-wrapper svg {
  stroke: var(--bg-darker);
}

.service-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* --- 关于我们与品质区块 (About & Experience Section) --- */
.about {
  padding: 8rem 0;
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 6rem;
  align-items: center;
}

.about-images {
  position: relative;
}

.about-img-panel {
  padding: 2.5rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 420px;
  overflow: hidden;
}

.about-graphic-node {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0.15;
  background-image: radial-gradient(rgba(0, 242, 254, 0.3) 1px, transparent 0);
  background-size: 24px 24px;
  z-index: 1;
}

.about-tech-circle {
  width: 180px;
  height: 180px;
  border: 2px solid var(--accent-cyan);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  box-shadow: inset 0 0 30px rgba(0, 242, 254, 0.1), 0 0 30px rgba(0, 242, 254, 0.1);
  animation: pulse 5s infinite ease-in-out;
}

.about-circle-logo {
  width: 70px;
  height: 70px;
  fill: url(#about-grad);
}

.about-badge {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  padding: 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 3;
}

.badge-years {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-white);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.badge-text {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-cyan);
  margin-top: 0.25rem;
}

.about-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.about-text {
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

.experience-bars {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.bar-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bar-info {
  display: flex;
  justify-content: space-between;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-bright);
}

.bar-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--grad-primary);
  border-radius: 4px;
  width: 0;
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- 案例与解决方案区块 (Cases Section) --- */
.cases {
  padding: 8rem 0;
  position: relative;
  background: radial-gradient(circle at 10% 30%, rgba(0, 242, 254, 0.03) 0%, transparent 50%);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.case-card {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-num {
  font-family: 'Outfit', sans-serif;
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  opacity: 0.15;
  margin-bottom: 1rem;
  transition: var(--transition-fast);
}

.case-card:hover .case-num {
  opacity: 0.8;
  color: var(--accent-cyan);
  text-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.case-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.case-subtitle {
  color: var(--accent-cyan);
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 1.5rem;
}

.case-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: auto;
  border-top: 1px solid var(--border-light);
  padding-top: 1.5rem;
}

.case-features li {
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-bright);
}

.case-features li svg {
  width: 16px;
  height: 16px;
  stroke: var(--accent-cyan);
  stroke-width: 2.5;
  fill: none;
}

/* --- 呼吁行动与合作区 (CTA Section) --- */
.cta {
  padding: 8rem 0;
  position: relative;
}

.cta-panel {
  padding: 5rem;
  position: relative;
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.08) 0%, rgba(127, 0, 255, 0.02) 50%, transparent 75%);
  pointer-events: none;
}

.cta-title {
  font-size: 2.75rem;
  font-weight: 800;
  max-width: 600px;
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}

/* --- 联系我们与表单 (Contact Section) --- */
.contact {
  padding: 8rem 0;
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 5rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.contact-info-desc {
  font-size: 1.05rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  color: var(--accent-cyan);
  font-size: 1.25rem;
}

.contact-text h4 {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.contact-text p {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  color: var(--text-white);
  font-weight: 600;
}

/* 交互式复制标签 */
.copy-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0, 242, 254, 0.05);
  border: 1px solid rgba(0, 242, 254, 0.15);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  margin-left: 0.75rem;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}

.copy-badge:hover {
  background: var(--accent-cyan);
  color: var(--bg-darker);
  border-color: transparent;
}

.copy-badge.copied {
  background: #10b981;
  color: white;
  border-color: transparent;
}

.contact-card {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-bright);
}

.form-control {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 0.9rem 1.25rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-white);
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

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

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.9rem 2rem;
  background: var(--grad-primary);
  color: var(--bg-darker);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.2);
  transition: var(--transition-fast);
  margin-top: 1rem;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 242, 254, 0.3);
}

/* --- 页脚区块 (Footer Section) --- */
footer {
  border-top: 1px solid var(--border-light);
  background: var(--bg-darker);
  padding: 6rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 5rem;
  margin-bottom: 4rem;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-logo-text {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-white);
}

.footer-desc {
  font-size: 0.92rem;
  line-height: 1.65;
}

.footer-links-col h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-white);
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text-white);
  padding-left: 4px;
}

.footer-quote {
  padding: 1.5rem;
  border-left: 2px solid var(--accent-cyan);
  background: rgba(255, 255, 255, 0.01);
  border-radius: 0 16px 16px 0;
}

.footer-quote-text {
  font-style: italic;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-bright);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding-top: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-dark);
}

.footer-copyright a {
  color: var(--text-muted);
}

.footer-copyright a:hover {
  color: var(--accent-cyan);
}

.footer-record {
  font-size: 0.8rem;
  color: var(--text-dark);
}

/* --- 返回顶部按钮 --- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(8, 14, 33, 0.6);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition-fast);
  z-index: 99;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
  transform: translateY(-3px);
}

/* --- 滚动展现动效底层 --- */
.reveal {
  opacity: 0;
  transform: translateY(40px) scale(0.98);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }

/* --- 关键帧动画定义 --- */
@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
  50% { transform: translate(-50%, -50%) scale(1.15); opacity: 0.9; }
}

@keyframes rotateRing {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes morphShape {
  0% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
  100% { border-radius: 60% 40% 30% 70% / 60% 60% 40% 50%; }
}

@keyframes floatNode {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(5deg); }
}

/* --- 响应式断点适配 --- */
@media (max-width: 1024px) {
  .hero {
    min-height: auto;
    padding-top: 10rem;
    padding-bottom: 6rem;
  }
  
  .hero-content {
    max-width: 100%;
    text-align: center;
  }
  
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-visual {
    display: none; /* 移动端/平板隐藏大型背景装饰 */
  }
  
  .mission-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .mission-graphic,
  .about-images {
    order: -1; /* 将图表或图像挪到文字上方展示 */
  }
  
  .services-grid,
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
  
  .footer-quote {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 1.5rem;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .services-grid,
  .cases-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-quote {
    grid-column: span 1;
  }
  
  /* 移动端菜单导航栏 */
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-darker);
    border-left: 1px solid var(--border-light);
    flex-direction: column;
    align-items: flex-start;
    padding: 6rem 2.5rem;
    gap: 2rem;
    transition: var(--transition-smooth);
    z-index: 1000;
  }
  
  .nav-menu.active {
    right: 0;
    box-shadow: -15px 0 30px rgba(0, 0, 0, 0.5);
  }
  
  .nav-btn {
    width: 100%;
    justify-content: center;
  }
  
  .cta-panel {
    padding: 3rem 1.5rem;
  }
  
  .cta-title {
    font-size: 2rem;
  }
  
  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .form-group.full-width {
    grid-column: span 1;
  }
  
  .contact-card {
    padding: 2rem 1.5rem;
  }
}