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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #0ea5e9;
  --text: #0f172a;
  --text-muted: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --header-h: 72px;
  --footer-bar-h: 56px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--footer-bar-h);
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.header.scrolled {
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 10px;
  font-size: 0.95rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 8px;
  transition: background 0.2s, transform 0.2s !important;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

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

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

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

.promo-bar {
  margin-top: var(--header-h);
  background: linear-gradient(90deg, #1e40af, #2563eb);
  color: #fff;
  overflow: hidden;
}

.promo-bar-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 40px;
}

.promo-label {
  flex-shrink: 0;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.promo-track-wrap {
  flex: 1;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.promo-track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: promo-scroll 28s linear infinite;
  white-space: nowrap;
}

.promo-track span {
  font-size: 0.875rem;
  opacity: 0.95;
}

@keyframes promo-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.hero-promo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.hero-promo-tag {
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.rentals-actions {
  display: flex;
  gap: 16px;
  max-width: 560px;
  margin: 48px auto 0;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.cert-card {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.cert-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.cert-card.cert-hot {
  border-color: #fcd34d;
  background: linear-gradient(180deg, #fffbeb 0%, #fff 40%);
}

.cert-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cert-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.cert-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.cert-meta span {
  padding: 2px 8px;
  background: var(--bg-alt);
  border-radius: 6px;
}

.cert-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.rentals-action-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 56px;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.rentals-action-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-copy-contact {
  background: #ff8c00;
  color: #fff;
}

.btn-copy-contact:hover {
  background: #e67e00;
}

.btn-telegram {
  background: #0088cc;
  color: #fff;
}

.btn-telegram:hover {
  background: #0077b5;
  color: #fff;
}

.telegram-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.telegram-icon svg {
  display: block;
}

.promo-cta {
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 50%, #0ea5e9 100%);
  padding: 56px 0;
}

.promo-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.promo-cta-text {
  color: #fff;
  flex: 1;
  min-width: 260px;
}

.promo-cta-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.promo-cta-text h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 8px;
}

.promo-cta-text p {
  opacity: 0.9;
  font-size: 0.95rem;
}

.btn-promo {
  flex-shrink: 0;
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-promo:hover {
  background: #f0f9ff;
  color: var(--primary-dark);
}

.hero {
  position: relative;
  min-height: auto;
  display: flex;
  align-items: center;
  padding-top: 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 50%, #e0f2fe 100%);
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 48px 0 80px;
}

.hero-badge {
  display: inline-flex;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  max-width: fit-content;
}

.stat {
  text-align: center;
  padding: 0 24px;
}

.stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
}

.stat span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}

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

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

.btn-full {
  width: 100%;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-muted);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-light), #e0f2fe);
  color: var(--primary);
  border-radius: 12px;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.service-card > p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.service-card ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-card li {
  padding: 4px 10px;
  background: var(--bg-alt);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 180px;
  max-width: 220px;
  text-align: center;
  padding: 0 12px;
}

.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.1rem;
}

.step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.step-connector {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--border));
  margin-top: 28px;
  flex-shrink: 0;
}

.advantages-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.advantages-intro {
  color: var(--text-muted);
  margin: 16px 0 32px;
}

.advantage-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.advantage-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.check {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #dcfce7;
  color: #16a34a;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
}

.advantage-list strong {
  display: block;
  margin-bottom: 2px;
}

.advantage-list span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.advantages-visual {
  position: relative;
  min-height: 320px;
}

.visual-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card-main {
  padding: 28px;
  position: relative;
  z-index: 1;
}

.card-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.progress-bar {
  height: 8px;
  background: var(--bg-alt);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 100px;
}

.card-status {
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 500;
}

.card-float {
  position: absolute;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float 3s ease-in-out infinite;
}

.card-float:first-of-type {
  top: -20px;
  right: -20px;
}

.card-float-2 {
  bottom: 20px;
  left: -30px;
  animation-delay: 1.5s;
}

.float-icon {
  font-size: 1.25rem;
}

.card-float p {
  font-size: 0.875rem;
  font-weight: 600;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--primary);
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: var(--bg-alt);
}

.faq-item p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 calc(48px + var(--footer-bar-h));
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #fff;
  font-weight: 600;
  margin-bottom: 12px;
}

.footer-copy {
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.footer-disclaimer {
  font-size: 0.8rem;
  opacity: 0.6;
}

.footer-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  height: var(--footer-bar-h);
  z-index: 200;
}

.footer-btn {
  flex: 1;
  border: none;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
}

.btn-qq {
  background: #ff8c00;
}

.btn-wechat {
  background: #1a3a6e;
}

.wechat-icon {
  width: 22px;
  height: 22px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
  z-index: 300;
}

.toast.show {
  opacity: 1;
}

@media (max-width: 900px) {
  .advantages-layout {
    grid-template-columns: 1fr;
  }

  .advantages-visual {
    margin-top: 32px;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav-links:not(.open) {
    display: none;
  }

  .process-steps {
    flex-direction: column;
    align-items: center;
  }

  .step-connector {
    width: 2px;
    height: 32px;
    margin: 0;
    background: linear-gradient(180deg, var(--primary-light), var(--border));
  }

  .hero-stats {
    justify-content: center;
  }

  .stat {
    padding: 8px 16px;
  }

  .stat-divider {
    display: none;
  }

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

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

  .promo-cta-inner {
    flex-direction: column;
    text-align: center;
  }

  .btn-promo {
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 64px 0;
  }

  .footer-btn {
    font-size: 13px;
  }
}