:root {
  --nav-height: 56px;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-gradient-end: #7c3aed;
  --text: #1f2937;
  --text-muted: #6b7280;
  --card: #ffffff;
  --page-bg: #f3f4f6;
  --hero-text: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--page-bg);
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  min-height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
  transition: box-shadow 0.2s;
}

.site-nav.is-scrolled {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-height);
  gap: 16px;
}

.nav-brand {
  font-weight: 700;
  font-size: 17px;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: #374151;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover,
.nav-links a.is-active {
  background: #eff6ff;
  color: var(--primary);
}

.nav-links .nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-gradient-end));
  color: #fff !important;
  font-weight: 600;
  margin-left: 4px;
}

.nav-links .nav-cta:hover {
  filter: brightness(1.05);
  background: linear-gradient(135deg, var(--primary), var(--primary-gradient-end));
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  border-radius: 8px;
  z-index: 130;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 22px;
  margin: 0 auto;
  background: #374151;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

body.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

body.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

body.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-gradient-end) 100%);
  padding: calc(var(--nav-height) + 48px) 0 64px;
  color: var(--hero-text);
}

.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-gradient-end) 100%);
  padding: calc(var(--nav-height) + 32px) 0 40px;
  color: var(--hero-text);
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(26px, 4.5vw, 36px);
}

.page-hero .page-desc {
  margin: 12px 0 0;
  max-width: 640px;
  font-size: 16px;
  opacity: 0.92;
  line-height: 1.7;
}

main.page-main {
  padding-top: 0;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 110;
}

body.nav-open .nav-overlay {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.tag {
  margin: 0 0 10px;
  font-size: 14px;
  opacity: 0.92;
}

h1 {
  font-size: clamp(32px, 5.5vw, 48px);
  margin: 0 0 16px;
  font-weight: 700;
}

.subtitle {
  max-width: 760px;
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.75;
  opacity: 0.95;
}

.service-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.service-tab {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: inherit;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.service-tab:hover {
  background: rgba(255, 255, 255, 0.3);
}

.hero-highlight {
  margin: -12px 0 20px;
  padding: 12px 16px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 15px;
  line-height: 1.6;
  max-width: 760px;
}

.service-tab-active {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
  font-weight: 600;
}

.section {
  padding: 64px 0;
}

.section-alt {
  background: #e5e7eb;
}

h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 28px;
  color: #111827;
}

.section-desc {
  color: var(--text-muted);
  margin: 0 0 28px;
  max-width: 760px;
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 22px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.card h3 {
  margin-top: 0;
  color: var(--primary);
  font-size: 18px;
}

.card p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.scene-list {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 16px;
}

.scene-list li {
  margin-bottom: 10px;
}

.stats-row {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin-bottom: 28px;
}

.stat-card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.stat-card strong {
  display: block;
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-card span {
  font-size: 14px;
  color: var(--text-muted);
}

.table-wrap {
  overflow-x: auto;
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.ip-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 720px;
}

.ip-table th,
.ip-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
  vertical-align: top;
}

.ip-table th {
  background: #f9fafb;
  color: #374151;
  font-weight: 600;
  white-space: nowrap;
}

.ip-table tbody tr:hover {
  background: #f9fafb;
}

.ip-table tbody tr:last-child td {
  border-bottom: none;
}

.ip-name {
  font-weight: 500;
  color: #111827;
}

.product-category {
  margin-bottom: 36px;
}

.product-category:last-of-type {
  margin-bottom: 0;
}

.product-cat-title {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--primary);
  font-weight: 600;
}

.product-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.product-card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px 22px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border-left: 3px solid var(--primary);
}

.product-card h4 {
  margin: 0 0 6px;
  font-size: 16px;
  color: #111827;
  line-height: 1.4;
}

.product-ver {
  margin: 0 0 10px;
  font-size: 12px;
  color: #9ca3af;
}

.product-card p:last-child {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.products-cta {
  margin: 32px 0 0;
  text-align: center;
}

.btn {
  display: inline-block;
  border: 0;
  border-radius: 10px;
  padding: 12px 22px;
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
}

.btn-primary {
  background: #fff;
  color: var(--primary);
}

.btn-primary:hover {
  background: #f9fafb;
}

.section:not(.hero) .btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-gradient-end));
  color: #fff;
}

.section:not(.hero) .btn-primary:hover {
  filter: brightness(1.05);
}

.trial-form {
  max-width: 680px;
  background: var(--card);
  padding: 28px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

label {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
}

input,
textarea,
select {
  border-radius: 10px;
  border: 1px solid #d1d5db;
  background: #fff;
  color: var(--text);
  padding: 10px 12px;
  font-size: 15px;
}

select {
  cursor: pointer;
  appearance: auto;
}

input::placeholder,
textarea::placeholder {
  color: #9ca3af;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid rgba(37, 99, 235, 0.35);
  border-color: var(--primary);
}

.form-status {
  min-height: 24px;
  margin: 10px 0 0;
  font-size: 14px;
}

.contact p {
  margin: 10px 0;
  color: #374151;
}

.company-info {
  background: var(--card);
  border-radius: 12px;
  padding: 24px 28px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  max-width: 640px;
}

.company-info p {
  margin: 8px 0;
}

.site-footer {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  background: #fff;
  border-top: 1px solid #e5e7eb;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .site-nav {
    padding-top: env(safe-area-inset-top);
  }

  .nav-inner {
    min-height: var(--nav-height);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: calc(var(--nav-height) + env(safe-area-inset-top));
    left: 12px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.14);
    background: #fff;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease, visibility 0.2s ease;
    overflow-y: auto;
    max-height: min(70vh, 440px);
    z-index: 120;
  }

  body.nav-open .nav-links {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    padding: 14px 16px;
    font-size: 16px;
  }

  .nav-links .nav-cta {
    margin: 8px 0 0;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: calc(var(--nav-height) + env(safe-area-inset-top) + 24px) 0 40px;
  }

  .page-hero {
    padding: calc(var(--nav-height) + env(safe-area-inset-top) + 20px) 0 32px;
  }

  .service-tabs {
    gap: 8px;
  }

  .service-tab {
    padding: 6px 14px;
    font-size: 13px;
  }
}