/* ========================================
   新睿网络科技 - 企业官网样式表
   设计风格：简约大气、科技感
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
  --color-primary: #0f1e3d;
  --color-primary-light: #1a3a5c;
  --color-accent: #00a8e8;
  --color-accent-light: #48cae4;
  --color-accent-dark: #0077b6;
  --color-bg: #ffffff;
  --color-bg-light: #f5f7fa;
  --color-bg-dark: #0f1e3d;
  --color-text: #1a1a2e;
  --color-text-muted: #6c757d;
  --color-text-light: #ffffff;
  --color-border: #e2e8f0;
  --color-success: #2dd4bf;
  --color-shadow: rgba(15, 30, 61, 0.08);
  --color-shadow-strong: rgba(15, 30, 61, 0.15);
  --color-overlay: rgba(15, 30, 61, 0.85);

  --font-sans: "Noto Sans SC", "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --container: 1200px;
  --nav-height: 72px;
}

/* ===== Reset ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ===== 通用容器 ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-sm {
  padding: 60px 0;
}

.section-bg-light {
  background: var(--color-bg-light);
}

.section-bg-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}

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

/* ===== 区块标题 ===== */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
  padding: 6px 18px;
  background: rgba(0, 168, 232, 0.1);
  border-radius: var(--radius-full);
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-bg-dark .section-header h2 {
  color: var(--color-text-light);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.section-bg-dark .section-header p {
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 168, 232, 0.35);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 168, 232, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-light);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.8);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

.btn-outline-dark:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-lg {
  padding: 16px 44px;
  font-size: 1.05rem;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px var(--color-shadow);
}

.navbar.scrolled .nav-logo-text {
  color: var(--color-primary);
}

.navbar.scrolled .nav-link {
  color: var(--color-text);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
  color: var(--color-accent);
}

.navbar.scrolled .lang-switcher {
  color: var(--color-text);
}

.navbar.scrolled .nav-toggle span {
  background: var(--color-text);
}

.nav-container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

.nav-logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-light);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-logo-text span {
  color: var(--color-accent);
}

/* Nav links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent-light);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* Language switcher */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
}

.navbar.scrolled .lang-switcher {
  background: rgba(15, 30, 61, 0.06);
}

.lang-btn {
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  background: transparent;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.navbar.scrolled .lang-btn {
  color: var(--color-text-muted);
}

.lang-btn:hover {
  color: var(--color-text-light);
}

.navbar.scrolled .lang-btn:hover {
  color: var(--color-primary);
}

.lang-btn.active {
  background: var(--color-accent);
  color: #fff !important;
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0a1628 0%, #0f1e3d 40%, #1a3a5c 100%);
  overflow: hidden;
  color: var(--color-text-light);
}

/* Animated background shapes */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.hero::before {
  width: 500px;
  height: 500px;
  background: var(--color-accent);
  top: -100px;
  right: -50px;
  animation: float1 8s ease-in-out infinite;
}

.hero::after {
  width: 400px;
  height: 400px;
  background: var(--color-accent-dark);
  bottom: -100px;
  left: -50px;
  animation: float2 10s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-30px, 40px); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, -30px); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding-top: var(--nav-height);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.6); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(45, 212, 191, 0); }
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.2rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero stats bar */
.hero-stats {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent-light);
  line-height: 1;
}

.hero-stat .label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
}

/* Page banner (for inner pages) */
.page-banner {
  position: relative;
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #0a1628 0%, #0f1e3d 50%, #1a3a5c 100%);
  color: var(--color-text-light);
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.25;
}

.page-banner-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.page-banner .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 20px;
}

.page-banner .breadcrumb a:hover {
  color: var(--color-accent-light);
}

.page-banner .breadcrumb span {
  color: rgba(255, 255, 255, 0.3);
}

.page-banner h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.page-banner p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

/* Feature card */
.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dark));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px var(--color-shadow-strong);
  border-color: transparent;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 168, 232, 0.12), rgba(0, 168, 232, 0.04));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
}

.feature-card:hover .feature-icon svg {
  stroke: #fff;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-accent);
  transition: var(--transition);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ===== 服务卡片（详细） ===== */
.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px var(--color-shadow);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px var(--color-shadow-strong);
}

.service-card-header {
  padding: 40px 32px 24px;
  background: linear-gradient(135deg, var(--color-bg-light), #fff);
}

.service-card-header .icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(0, 168, 232, 0.25);
}

.service-card-header .icon-wrap svg {
  width: 32px;
  height: 32px;
  stroke: #fff;
}

.service-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.service-card .sub-title {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.service-card-body {
  padding: 24px 32px 32px;
}

.service-card-body p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-tag {
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary-light);
  background: var(--color-bg-light);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

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

.stat-item .stat-num {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-item .stat-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 12px;
}

/* ===== 案例卡片 ===== */
.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px var(--color-shadow);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px var(--color-shadow-strong);
}

.case-card-image {
  height: 220px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-card-image .case-bg {
  position: absolute;
  inset: 0;
  opacity: 0.9;
}

.case-card-image .case-icon {
  position: relative;
  z-index: 2;
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.case-card-image .case-icon svg {
  width: 32px;
  height: 32px;
  stroke: #fff;
}

.case-card-body {
  padding: 28px;
}

.case-card .case-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(0, 168, 232, 0.1);
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.case-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.case-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.case-card .case-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.case-card .case-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 关于我们 - 里程碑 ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), transparent);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 40px 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  margin-left: 50%;
  padding: 0 0 40px 40px;
  text-align: left;
}

.timeline-item::after {
  content: "";
  position: absolute;
  top: 6px;
  right: -7px;
  width: 14px;
  height: 14px;
  background: #fff;
  border: 3px solid var(--color-accent);
  border-radius: 50%;
  z-index: 2;
}

.timeline-item:nth-child(even)::after {
  right: auto;
  left: -7px;
}

.timeline-item .year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.timeline-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== 价值观卡片 ===== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.value-card {
  text-align: center;
  padding: 40px 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 40px var(--color-shadow-strong);
}

.value-card .value-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 168, 232, 0.1), rgba(0, 168, 232, 0.02));
  display: flex;
  align-items: center;
  justify-content: center;
}

.value-card .value-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--color-accent);
}

.value-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== 联系页面 ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info-card {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.contact-info-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.3;
}

.contact-info-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.contact-info-card > p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
  line-height: 1.8;
  position: relative;
  z-index: 2;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
}

.contact-info-item .icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item .icon-box svg {
  width: 22px;
  height: 22px;
  stroke: var(--color-accent-light);
}

.contact-info-item .info-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 4px;
}

.contact-info-item .info-value {
  font-size: 1rem;
  font-weight: 500;
  color: #fff;
}

/* Contact form */
.contact-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: 0 4px 30px var(--color-shadow);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-group label .required {
  color: #ef4444;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  font-size: 0.95rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-light);
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--color-accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0, 168, 232, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  font-size: 1rem;
  font-weight: 600;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 168, 232, 0.35);
}

.form-submit:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 168, 232, 0.45);
}

.form-success {
  display: none;
  padding: 16px 20px;
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.3);
  border-radius: var(--radius-sm);
  color: #0d9488;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.form-success.show {
  display: block;
  animation: fadeInUp 0.4s ease;
}

/* ===== CTA 区域 ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.2;
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.cta-content h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 页脚 ===== */
.footer {
  background: #0a1628;
  color: rgba(255, 255, 255, 0.7);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 60px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-brand .footer-logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
}

.footer-brand .footer-logo-text span {
  color: var(--color-accent);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  max-width: 320px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

.footer-social a svg {
  width: 20px;
  height: 20px;
  fill: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.footer-social a:hover svg {
  fill: #fff;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-accent-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }
.fade-up:nth-child(6) { transition-delay: 0.5s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 20px rgba(0, 168, 232, 0.4);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-accent-dark);
  transform: translateY(-4px);
}

.back-to-top svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
}

/* ===== 案例筛选 ===== */
.case-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.case-filter-btn {
  padding: 10px 28px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
}

.case-filter-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.case-filter-btn.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 4px 15px rgba(0, 168, 232, 0.3);
}

/* ===== 服务详情区块 ===== */
.service-detail {
  display: flex;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--color-border);
}

.service-detail:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.service-detail.reverse {
  flex-direction: row-reverse;
}

.service-detail-content {
  flex: 1;
}

.service-detail-visual {
  flex: 0 0 380px;
  height: 320px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.service-detail-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.9;
}

.service-detail-visual .visual-icon {
  position: relative;
  z-index: 2;
  width: 100px;
  height: 100px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.service-detail-visual .visual-icon svg {
  width: 48px;
  height: 48px;
  stroke: #fff;
}

.service-detail-content .detail-sub {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.service-detail-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.service-detail-content > p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 24px;
}

.service-detail-list {
  margin-bottom: 20px;
}

.service-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.service-detail-list li::before {
  content: "";
  width: 22px;
  height: 22px;
  min-width: 22px;
  border-radius: 50%;
  background: rgba(0, 168, 232, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  position: relative;
}

.service-detail-list li::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 7px;
  width: 8px;
  height: 5px;
  border-left: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(-45deg);
}

.service-detail-list li {
  position: relative;
}

.service-detail-tech {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary-light);
  background: var(--color-bg-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* ===== 关于我们 - 介绍区块 ===== */
.about-intro {
  display: flex;
  gap: 60px;
  align-items: center;
}

.about-intro-text {
  flex: 1;
}

.about-intro-text p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 20px;
}

.about-intro-visual {
  flex: 0 0 400px;
  height: 400px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-intro-visual::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}

.about-intro-visual .intro-stat {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.about-intro-visual .intro-stat .num {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, #48cae4, var(--color-accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-intro-visual .intro-stat .label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 12px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 0;
    transform: translateY(-150%);
    transition: var(--transition);
    box-shadow: 0 10px 40px var(--color-shadow);
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-menu .nav-link {
    width: 100%;
    padding: 14px 16px;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .nav-toggle {
    display: flex;
  }

  /* 手机端 logo 防溢出：占据剩余空间，长品牌名（如俄语）自动省略号 */
  .nav-logo {
    flex: 1;
    min-width: 0;
  }

  .nav-logo-text {
    font-size: 1.05rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav-right {
    flex-shrink: 0;
  }

  /* 方案A：手机端顶栏隐藏语言按钮，收进汉堡菜单底部 */
  .nav-right > .lang-switcher {
    display: none;
  }

  .nav-lang-item {
    display: flex;
    justify-content: center;
    padding: 18px 0 4px;
  }

  .nav-lang-item .lang-switcher {
    background: rgba(15, 30, 61, 0.06);
  }

  .nav-lang-item .lang-btn {
    color: var(--color-text-muted);
  }

  .nav-lang-item .lang-btn.active {
    background: var(--color-accent);
    color: #fff !important;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .page-banner h1 {
    font-size: 2rem;
  }

  .section {
    padding: 64px 0;
  }

  .section-header h2 {
    font-size: 1.8rem;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

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

  .service-detail,
  .service-detail.reverse {
    flex-direction: column;
  }

  .service-detail-visual {
    flex: 0 0 auto;
    width: 100%;
    height: 240px;
  }

  .about-intro {
    flex-direction: column;
  }

  .about-intro-visual {
    flex: 0 0 auto;
    width: 100%;
    height: 280px;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 50px;
    padding-right: 0;
    text-align: left;
  }

  .timeline-item:nth-child(even) {
    margin-left: 0;
    padding-left: 50px;
    padding-right: 0;
  }

  .timeline-item::after,
  .timeline-item:nth-child(even)::after {
    left: 13px;
    right: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-info-card,
  .contact-form {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

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

  .btn {
    width: 100%;
  }

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

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

/* ===== 微信联系弹窗 ===== */
.wx-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.wx-modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.wx-modal {
  background: #ffffff;
  border-radius: 20px;
  padding: 44px 36px 32px;
  max-width: 340px;
  width: calc(100% - 40px);
  text-align: center;
  position: relative;
  transform: translateY(24px) scale(0.95);
  transition: transform 0.3s ease;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.25);
}

.wx-modal-overlay.show .wx-modal {
  transform: translateY(0) scale(1);
}

.wx-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border: none;
  background: #f1f5f9;
  border-radius: 50%;
  cursor: pointer;
  color: #64748b;
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.wx-modal-close:hover {
  background: #e2e8f0;
  color: var(--color-primary);
}

.wx-modal-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, #07c160, #05a04c);
  display: flex;
  align-items: center;
  justify-content: center;
}

.wx-modal-icon svg {
  width: 32px;
  height: 32px;
  fill: #ffffff;
}

.wx-modal h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.wx-modal-desc {
  font-size: 0.9rem;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 20px;
}

.wx-qr-box {
  width: 200px;
  height: 200px;
  margin: 0 auto 20px;
  border-radius: 14px;
  overflow: hidden;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.wx-qr-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.wx-qr-placeholder {
  color: #94a3b8;
  font-size: 0.78rem;
  text-align: center;
  line-height: 1.5;
  padding: 12px;
}

.wx-qr-placeholder svg {
  width: 56px;
  height: 56px;
  margin: 0 auto 8px;
  display: block;
  fill: #cbd5e1;
}

.wx-id-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 16px;
}

.wx-id-label {
  font-size: 0.78rem;
  color: #94a3b8;
  display: block;
  text-align: left;
  margin-bottom: 2px;
}

.wx-id-value {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.95rem;
  display: block;
  text-align: left;
  word-break: break-all;
}

.wx-copy-btn {
  flex-shrink: 0;
  border: none;
  background: #07c160;
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.wx-copy-btn:hover {
  background: #05a04c;
  transform: translateY(-1px);
}

.wx-copy-btn.copied {
  background: var(--color-primary);
}

/* 联系页 - 微信号复制条目 */
.contact-info-item.clickable {
  cursor: pointer;
  border-radius: 12px;
  transition: background 0.2s ease;
  padding: 8px;
  margin: 0 -8px;
}

.contact-info-item.clickable:hover {
  background: #f1f5f9;
}

.wx-copied-tip {
  display: inline-block;
  font-size: 0.72rem;
  color: #07c160;
  margin-left: 6px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.wx-copied-tip.show {
  opacity: 1;
}

@media (max-width: 480px) {
  .wx-modal {
    padding: 36px 24px 24px;
  }

  .wx-qr-box {
    width: 180px;
    height: 180px;
  }
}

/* ===== 语言切换统一收在导航菜单内（单一来源，杜绝重复） ===== */
@media (min-width: 769px) {
  .nav-lang-item {
    display: flex;
    align-items: center;
    margin-left: 10px;
  }
}

.nav-logo {
  min-width: 0;
}

.nav-logo-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}