/* ============================
   o易官网 全局样式表
   配色：深色背景(#0a1628) + 安全蓝(#1e40af) + 金色(#f59e0b) + 翠绿(#10b981) + 白色
   ============================ */

/* CSS 变量 */
:root {
  --bg-primary: #0a1628;
  --bg-secondary: #0f1f3a;
  --bg-card: #112240;
  --bg-card-hover: #152a50;
  --blue-primary: #1e40af;
  --blue-light: #3b82f6;
  --blue-glow: rgba(30, 64, 175, 0.4);
  --gold: #f59e0b;
  --gold-light: #fbbf24;
  --green: #10b981;
  --green-dark: #059669;
  --white: #ffffff;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #1e293b;
  --border-glow: rgba(59, 130, 246, 0.5);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--blue-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--gold);
}

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

/* ============================
   导航栏
   ============================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition), box-shadow var(--transition);
}

header.scrolled {
  background: rgba(10, 22, 40, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 68px;
}

.brand {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 2px;
}

.brand a {
  color: var(--gold);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(30, 64, 175, 0.3);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 4px 8px;
}

/* ============================
   Hero 主视觉区
   ============================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 24px 80px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(30, 64, 175, 0.25), transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(245, 158, 11, 0.1), transparent 50%),
              radial-gradient(ellipse at 80% 70%, rgba(16, 185, 129, 0.08), transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(30, 64, 175, 0.3);
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: 50px;
  color: var(--blue-light);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
  background: linear-gradient(135deg, var(--white), var(--gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 36px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-light));
  color: var(--white);
  box-shadow: 0 4px 16px var(--blue-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.5);
  color: var(--white);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold), #fbbf24);
  color: #0a1628;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.6);
  color: #0a1628;
}

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

.btn-outline:hover {
  border-color: var(--blue-light);
  background: rgba(30, 64, 175, 0.15);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.1rem;
}

/* ============================
   通用 Section
   ============================ */
section {
  padding: 80px 24px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--white);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ============================
   特性卡片区
   ============================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-primary), var(--gold), var(--green));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-glow);
  background: var(--bg-card-hover);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(30, 64, 175, 0.2);
  margin-bottom: 20px;
  font-size: 1.6rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--white);
}

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

/* ============================
   统计数字区
   ============================ */
.stats-section {
  background: var(--bg-secondary);
  padding: 60px 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.stat-item {
  padding: 20px;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================
   CTA 区
   ============================ */
.cta-section {
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.3), rgba(10, 22, 40, 0.95));
  text-align: center;
  padding: 80px 24px;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.1), transparent 60%);
}

.cta-section .section-header {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  margin-bottom: 16px;
}

.cta-download-buttons {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

/* ============================
   页脚
   ============================ */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 24px 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-col h4 {
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--gold);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  margin-top: 32px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ============================
   关于页面 - 时间线
   ============================ */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-primary), var(--gold), var(--green));
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding: 24px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

.timeline-item:hover {
  border-color: var(--blue-glow);
  box-shadow: var(--shadow-sm);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.5);
}

.timeline-year {
  display: inline-block;
  padding: 4px 14px;
  background: var(--blue-primary);
  color: var(--white);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.timeline-item h3 {
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 8px;
}

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

/* ============================
   团队 / 资质卡片
   ============================ */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all var(--transition);
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-glow);
}

.cert-card img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--border-color);
}

.cert-card h3 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 6px;
}

.cert-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ============================
   服务页面
   ============================ */
.services-list {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.service-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.service-item:hover {
  transform: translateX(6px);
  border-color: var(--blue-glow);
  box-shadow: var(--shadow-sm);
  background: var(--bg-card-hover);
}

.service-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(30, 64, 175, 0.2);
  font-size: 1.8rem;
}

.service-text h3 {
  font-size: 1.15rem;
  color: var(--white);
  margin-bottom: 8px;
}

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

/* ============================
   FAQ 手风琴
   ============================ */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}

details.faq-item:hover {
  border-color: var(--blue-glow);
}

details.faq-item summary {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  color: var(--white);
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  transition: background var(--transition);
}

details.faq-item summary::-webkit-details-marker {
  display: none;
}

details.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--gold);
  transition: transform var(--transition);
}

details.faq-item[open] summary {
  background: rgba(30, 64, 175, 0.2);
  border-bottom: 1px solid var(--border-color);
}

details.faq-item[open] summary::after {
  content: "\2212";
  transform: rotate(0deg);
}

.faq-answer {
  padding: 20px 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ============================
   联系表单
   ============================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
}

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

.form-group label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px var(--blue-glow);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}

.contact-info-card:hover {
  border-color: var(--blue-glow);
}

.contact-info-card h3 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 10px;
}

.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ============================
   页面横幅
   ============================ */
.page-banner {
  padding: 120px 24px 60px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(30, 64, 175, 0.3), transparent 60%);
}

.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}

.page-banner p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  list-style: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 12px;
}

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

.breadcrumb a:hover {
  color: var(--gold);
}

/* ============================
   安全系统展示
   ============================ */
.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.security-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  border-left: 4px solid var(--green);
}

.security-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--gold);
}

.security-card h3 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

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

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

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 16px var(--blue-glow); }
  50% { box-shadow: 0 4px 30px rgba(59, 130, 246, 0.7); }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.btn-pulse {
  animation: pulse 2s infinite;
}

/* ============================
   响应式设计
   ============================ */
@media (max-width: 768px) {
  header nav {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 20px;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 8px 0;
    gap: 2px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .hero {
    min-height: auto;
    padding: 120px 20px 60px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

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

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

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

  .service-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  section {
    padding: 50px 20px;
  }

  .page-banner {
    padding: 100px 20px 40px;
  }

  .cert-grid,
  .security-grid {
    grid-template-columns: 1fr;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline-item::before {
    left: -24px;
    width: 10px;
    height: 10px;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

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

  .stat-number {
    font-size: 2.2rem;
  }
}