/* ========================================
   Informat 织信 - AI低代码平台 官网样式
   ======================================== */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #4F46E5;
  --primary-light: #6366F1;
  --primary-dark: #3730A3;
  --secondary: #06B6D4;
  --accent: #F59E0B;
  --bg-dark: #0F172A;
  --bg-darker: #020617;
  --bg-card: #1E293B;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: #334155;
  --gradient-1: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
  --gradient-2: linear-gradient(135deg, #7C3AED 0%, #4F46E5 100%);
  --gradient-3: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.4);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 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', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Container ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}
.nav.scrolled { background: rgba(15, 23, 42, 0.95); box-shadow: var(--shadow); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-primary);
}
.nav-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  color: #fff;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.nav-cta {
  background: var(--gradient-1) !important;
  color: #fff !important;
  font-weight: 600 !important;
  padding: 10px 24px !important;
  border-radius: 10px !important;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(79,70,229,0.4); }
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(79,70,229,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 60%, rgba(6,182,212,0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(124,58,237,0.08) 0%, transparent 50%);
  animation: heroBgFloat 20s ease-in-out infinite;
}
@keyframes heroBgFloat {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(2%, -2%); }
  50% { transform: translate(-1%, 1%); }
  75% { transform: translate(1%, -1%); }
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(79,70,229,0.15);
  border: 1px solid rgba(79,70,229,0.3);
  padding: 6px 20px;
  border-radius: 100px;
  font-size: 0.88rem;
  color: var(--primary-light);
  margin-bottom: 32px;
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--secondary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero h1 .gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 40px;
  line-height: 1.8;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-primary {
  background: var(--gradient-1);
  color: #fff;
  box-shadow: 0 4px 24px rgba(79,70,229,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 36px rgba(79,70,229,0.5); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); background: rgba(79,70,229,0.08); transform: translateY(-2px); }
.btn-lg { padding: 16px 40px; font-size: 1.08rem; border-radius: 14px; }

/* ---------- Stats Bar ---------- */
.stats-bar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
  background: rgba(30,41,59,0.3);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item .stat-number {
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}
.stat-item .stat-label { color: var(--text-secondary); font-size: 0.95rem; margin-top: 4px; }

/* ---------- Section ---------- */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  display: inline-block;
  color: var(--primary-light);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Features Grid ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-1);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover { border-color: rgba(79,70,229,0.4); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}
.feature-icon.blue { background: rgba(79,70,229,0.15); color: var(--primary-light); }
.feature-icon.cyan { background: rgba(6,182,212,0.15); color: var(--secondary); }
.feature-icon.amber { background: rgba(245,158,11,0.15); color: var(--accent); }
.feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* ---------- AI Capabilities ---------- */
.ai-section { background: var(--bg-darker); }
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.capability-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 20px;
  transition: var(--transition);
}
.capability-card:hover { border-color: rgba(79,70,229,0.3); box-shadow: var(--shadow); }
.capability-num {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 12px;
  background: var(--gradient-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
}
.capability-content h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.capability-content p { color: var(--text-secondary); font-size: 0.93rem; line-height: 1.7; }
.capability-tags { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.capability-tags span {
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(79,70,229,0.1);
  color: var(--primary-light);
  border: 1px solid rgba(79,70,229,0.2);
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(79,70,229,0.15) 0%, transparent 70%);
}
.cta-banner > * { position: relative; z-index: 1; }
.cta-banner h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; }
.cta-banner p { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 32px; }

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo-text { font-size: 1.4rem; font-weight: 800; margin-bottom: 12px; }
.footer-brand p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--text-primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ---------- Modal / 弹窗 ---------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background: rgba(2, 6, 23, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  padding: 24px;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  max-width: 480px;
  width: 100%;
  position: relative;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal-overlay.active .modal-box {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255,255,255,0.06);
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  line-height: 1;
}
.modal-close:hover {
  background: rgba(255,255,255,0.12);
  color: var(--text-primary);
}

.modal-header {
  text-align: center;
  margin-bottom: 32px;
}
.modal-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(79,70,229,0.15) 0%, rgba(6,182,212,0.15) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--primary-light);
}
.modal-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom:8px;
}
.modal-header p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ---------- Modal Form ---------- */
.modal-form .form-group {
  margin-bottom: 20px;
}
.modal-form label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.modal-form label .required {
  color: #EF4444;
  margin-left: 2px;
}
.modal-form input[type="text"],
.modal-form input[type="tel"] {
  width: 100%;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}
.modal-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
  background: rgba(15, 23, 42, 0.9);
}
.modal-form input::placeholder {
  color: var(--text-muted);
}

.form-group.has-error input {
  border-color: #EF4444;
  box-shadow: 0 0 0 3px rgba(239,68,68,0.1);
}
.form-error {
  display: block;
  color: #EF4444;
  font-size: 0.8rem;
  margin-top: 4px;
  min-height: 18px;
}

.modal-submit {
  width: 100%;
  justify-content: center;
  margin-top: 8px;
  padding: 14px 32px;
  font-size: 1.05rem;
}

/* ---------- Loading Spinner ---------- */
.loading-hidden {
  display: none;
  align-items: center;
  gap: 8px;
}
.spinner {
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Success State ---------- */
.modal-success {
  display: none;
  text-align: center;
  padding: 16px 0;
}
.modal-success .success-icon {
  margin-bottom: 16px;
}
.modal-success h4 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #57CA8C;
}
.modal-success p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}
.modal-close-btn {
  min-width: 140px;
  justify-content: center;
}

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
    padding: 16px;
  }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 2rem; }
  .features-grid { grid-template-columns: 1fr; }
  .capabilities-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 40px 24px; }
  .section { padding: 60px 0; }
  .modal-box { padding: 32px 24px; }
}