:root {
  --bg: #0b1220;
  --panel: #111a2b;
  --text: #e8edf7;
  --muted: #b3bfd3;
  --brand: #3c7cff;
  --brand-hover: #2d67dd;
  --line: #23314d;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #f4f7fb;
  color: #1d2738;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 18, 32, 0.95);
  backdrop-filter: blur(8px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

.nav-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 68px;
  padding-block: 8px;
}

.logo {
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
}

.main-nav {
  display: flex;
  gap: 20px;
}

.main-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
}

.main-nav a:hover {
  color: #7ea8ff;
}

.main-nav a.active {
  color: #9ebcff;
}

.menu-toggle {
  display: none;
  flex-shrink: 0;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--white);
  padding: 10px 12px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.hero {
  background: linear-gradient(135deg, #0b1220 0%, #1b2f55 100%);
  color: var(--white);
  padding: 100px 0 90px;
  padding-left: max(0px, env(safe-area-inset-left));
  padding-right: max(0px, env(safe-area-inset-right));
}

.hero-content {
  max-width: 740px;
}

.hero-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  border: 1px solid #4366ad;
  border-radius: 999px;
  font-size: 0.85rem;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.25;
}

.hero p {
  margin: 0 0 24px;
  color: #cfdaef;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--brand);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--brand-hover);
}

.btn-outline {
  border: 1px solid #5a78b6;
  color: var(--white);
}

.services,
.cases {
  padding: 70px 0;
}

.text-link {
  display: inline-block;
  margin-top: 16px;
  color: #2d61cf;
  text-decoration: none;
  font-weight: 600;
}

.text-link:hover {
  color: #1f4fb3;
}

.page-banner {
  background: linear-gradient(135deg, #0b1220 0%, #1b2f55 100%);
  color: var(--white);
  padding: 72px 0 60px;
  padding-left: max(0px, env(safe-area-inset-left));
  padding-right: max(0px, env(safe-area-inset-right));
}

.page-banner h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 2.8vw, 2.4rem);
}

.page-banner p {
  margin: 0;
  color: #cfdaef;
}

h2 {
  margin-top: 0;
  font-size: clamp(1.35rem, 4.2vw, 2rem);
  color: #162338;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.card {
  background: var(--white);
  border: 1px solid #e2e8f4;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 8px 20px rgba(21, 38, 69, 0.05);
}

.about {
  background: #eaf0fb;
  padding: 70px 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.stats div {
  background: var(--white);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.stats strong {
  display: block;
  font-size: 1.5rem;
  color: #0c2d74;
}

.case-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.case-item {
  background: var(--white);
  border: 1px solid #dfe7f6;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 10px 24px rgba(17, 36, 70, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.case-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(17, 36, 70, 0.1);
}

.case-image {
  width: 100%;
  max-width: none;
  height: auto;
  display: block;
  border-radius: 8px;
  margin-bottom: 12px;
  border: 1px solid #d8e2f5;
}

.case-item h3 {
  margin: 0 0 8px;
}

.case-item p {
  margin: 0 0 8px;
}

.case-item span {
  color: #4f5d79;
  font-size: 0.9rem;
}

.contact {
  background: var(--bg);
  color: var(--text);
  padding: 70px 0;
}

.contact h2 {
  color: var(--white);
}

.contact-form {
  display: grid;
  gap: 12px;
  max-width: 560px;
  margin-top: 18px;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(320px, 1.4fr);
  gap: 24px;
  align-items: start;
}

.contact-form label {
  display: grid;
  gap: 6px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #344b74;
  border-radius: 8px;
  background: #121d33;
  color: var(--white);
}

.form-message {
  min-height: 24px;
  margin: 0;
  color: #8eb0ff;
}

.site-footer {
  background: #070d18;
  color: #b8c6e2;
  text-align: center;
  padding: 16px 0;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
}

.site-footer p {
  margin: 0;
  font-size: clamp(0.8rem, 3.5vw, 0.95rem);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    z-index: 20;
    background: #111d35;
    border: 1px solid #30446a;
    border-radius: 12px;
    padding: 8px;
    display: none;
    flex-direction: column;
    gap: 2px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  }

  .main-nav a {
    padding: 14px 14px;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-radius: 8px;
    -webkit-tap-highlight-color: transparent;
  }

  .main-nav a:active {
    background: rgba(62, 124, 255, 0.15);
  }

  .main-nav.active {
    display: flex;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .hero h1 {
    font-size: clamp(1.45rem, 6vw, 2rem);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 320px;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 44px;
    touch-action: manipulation;
  }

  .page-banner {
    padding: 44px 0 36px;
  }

  .services,
  .cases {
    padding: 44px 0;
  }

  .about {
    padding: 44px 0;
  }

  .contact {
    padding: 44px 0;
    padding-bottom: max(44px, calc(44px + env(safe-area-inset-bottom)));
  }

  .contact-form input,
  .contact-form textarea {
    font-size: 16px;
  }

  .contact-form .btn-primary {
    width: 100%;
    min-height: 44px;
    touch-action: manipulation;
  }

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

  .case-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .case-item:hover {
    transform: none;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(
      1120px,
      calc(100% - 32px - env(safe-area-inset-left, 0px) - env(safe-area-inset-right, 0px))
    );
  }

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