:root {
  --bg: #f6f8fb;
  --white: #ffffff;
  --text: #1b2430;
  --muted: #5f6b7a;
  --line: #e5eaf1;
  --primary: #1f6feb;
  --primary-dark: #1557b0;
  --accent: #eaf2ff;
  --success: #dff7e7;
  --success-text: #18794e;
  --shadow: 0 20px 50px rgba(17, 24, 39, 0.08);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

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

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(246, 248, 251, 0.9);
  border-bottom: 1px solid rgba(229, 234, 241, 0.8);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo,
.footer-logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo span,
.footer-logo span {
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-weight: 600;
  transition: 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--primary);
}

.hero {
  padding: 56px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 32px;
  align-items: center;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(229, 234, 241, 0.7);
}

.hero-image {
  overflow: hidden;
  padding: 18px;
}

.hero-image img {
  border-radius: 18px;
  object-fit: cover;
  min-height: 420px;
}

.hero-content h1,
.page-hero h1 {
  margin: 14px 0 14px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.subtitle,
.page-hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 700px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 700;
}

.badge-soft {
  background: var(--accent);
  color: var(--primary);
}

.price-box {
  margin: 24px 0 20px;
  display: inline-flex;
  flex-direction: column;
  gap: 6px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 18px;
  min-width: 180px;
}

.price-label {
  color: var(--muted);
  font-size: 0.95rem;
}

.price {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 12px 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 20px;
  border-radius: 14px;
  font-weight: 700;
  transition: 0.2s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

.btn-secondary {
  background: var(--white);
  border-color: var(--line);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-full {
  width: 100%;
}

.quick-features,
.feature-list,
.mini-list {
  margin: 0;
  padding-left: 20px;
}

.quick-features li,
.feature-list li,
.mini-list li {
  margin-bottom: 10px;
}

.section {
  padding: 36px 0;
}

.alt-section {
  background: linear-gradient(180deg, rgba(31,111,235,0.05), rgba(31,111,235,0.02));
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.content-card {
  padding: 26px;
}

.content-card h3,
.benefit-card h3,
.product-body h2 {
  margin-top: 0;
  margin-bottom: 14px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit-card {
  padding: 24px;
}

.benefit-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--primary);
  font-weight: 800;
  margin-bottom: 18px;
}

.recommend-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.contact-section {
  padding-bottom: 64px;
}

.form-card {
  padding: 28px;
}

.contact-form {
  display: grid;
  gap: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  font-weight: 700;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  font: inherit;
  outline: none;
  transition: 0.2s ease;
  background: #fff;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(31, 111, 235, 0.12);
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.success-message {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--success);
  color: var(--success-text);
  font-weight: 700;
}

.hidden {
  display: none;
}

.page-hero {
  padding: 56px 0 18px;
}

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

.product-card {
  overflow: hidden;
}

.product-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #f1f5f9;
}

.product-image img {
  height: 100%;
  object-fit: cover;
}

.product-body {
  padding: 22px;
}

.product-body p {
  color: var(--muted);
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.product-price {
  font-size: 1.55rem;
  font-weight: 800;
}

.site-footer {
  margin-top: 24px;
  padding: 28px 0;
  background: #111827;
  color: #d8dee8;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #d8dee8;
}

.footer-links a:hover {
  color: #fff;
}

@media (max-width: 980px) {
  .hero-grid,
  .content-grid,
  .benefits-grid,
  .product-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .recommend-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-image img {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: auto;
    padding: 16px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 28px;
  }

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

  .btn {
    width: 100%;
  }

  .product-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .product-price {
    font-size: 1.35rem;
  }
}