:root {
  --primary: #1e6fff;
  --primary-dark: #1557cc;
  --accent: #2fc4ff;
  --bg: #f5f8ff;
  --text: #1f2a44;
  --muted: #5f6c85;
  --border: #e3e9f5;
  --card: #ffffff;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: #ffffff;
  line-height: 1.6;
  overflow-y: scroll;
  padding-top: var(--header-height);
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-height);
  padding: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  white-space: nowrap;
  flex: 0 0 auto;
  max-width: 260px;
}

.logo span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.logo-badge {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

.logo-mark {
  height: 40px;
  border-radius: 12px;
  flex-shrink: 0;
  box-shadow: 0 10px 20px rgba(21, 87, 204, 0.18);
}

.logo-horizontal {
  width: auto;
  height: 44px;
}

.nav {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  justify-content: flex-end;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  min-width: 0;
  flex: 1 1 auto;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  height: 28px;
  padding: 4px 6px;
  position: relative;
  line-height: 1.25;
  white-space: nowrap;
  border-radius: 8px;
}

.nav a.active,
.nav a:hover {
  color: var(--primary);
  background: #eef4ff;
}

.nav a.active::after {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--muted);
}

.hero {
  background: radial-gradient(circle at 20% 20%, #e6f0ff, #f8fbff 50%, #ffffff 100%);
  padding: 80px 0 70px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  margin: 0 0 16px;
}

.hero p {
  color: var(--muted);
  margin: 0 0 24px;
}

.hero-media {
  border-radius: 22px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 40px rgba(21, 87, 204, 0.12);
  margin-bottom: 18px;
  background: #ffffff;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.hero-media picture {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.image-blue {
  filter: hue-rotate(200deg) saturate(1.1) brightness(0.95);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: 0.2s ease;
}

.button.outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.button.outline:hover {
  color: #fff;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.lang-switch span {
  font-size: 14px;
  color: var(--muted);
}

.lang-switch a {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.lang-switch a.active {
  border-color: var(--primary);
  background: #eef4ff;
  color: var(--primary);
}

.header-right {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 1 1 auto;
  gap: 2px;
  position: relative;
}

.header-lang {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-bottom: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  background: #ffffff;
  cursor: pointer;
  min-width: 78px;
  justify-content: center;
  user-select: none;
}

.header-lang::after {
  content: "▾";
  font-size: 10px;
  color: var(--muted);
  margin-left: 6px;
  line-height: 1;
}

.header-lang a {
  display: none;
  border: 0;
  padding: 0;
  font-size: 12px;
  color: var(--muted);
}

.header-lang a.active {
  display: inline-flex;
  background: transparent;
  cursor: pointer;
}

.header-lang.open {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  display: grid;
  gap: 4px;
  min-width: 108px;
  padding: 6px;
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.12);
  z-index: 20;
}

.header-lang.open::after {
  display: none;
}

.header-lang.open a {
  display: flex;
  justify-content: center;
  padding: 7px 8px;
  border-radius: 8px;
}

.header-lang.open a:hover {
  background: #eef4ff;
  color: var(--primary);
}

.section {
  padding: 70px 0;
}

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

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 32px);
}

.section-title p {
  margin: 0;
  color: var(--muted);
  max-width: 560px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(21, 87, 204, 0.08);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 18px;
}

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

.feature-list {
  margin: 10px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.feature-list li {
  margin: 0;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: #eef4ff;
  color: var(--primary);
  font-size: 13px;
  border: 1px solid #d5e4ff;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.stat {
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 22px;
  border-radius: 16px;
}

.stat span {
  display: block;
  font-size: 13px;
  color: var(--muted);
}

.stat strong {
  font-size: 22px;
}

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

.image-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 10px 28px rgba(21, 87, 204, 0.06);
}

.image-frame {
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #eef4ff;
}

.image-frame picture {
  display: block;
  width: 100%;
  height: 100%;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.image-card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.banner {
  padding: 50px 0;
  background: linear-gradient(120deg, #e5efff, #f7faff);
}

.banner h1 {
  margin: 0 0 8px;
}

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

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.timeline-item span {
  font-weight: 600;
  color: var(--primary);
  min-width: 120px;
}

.timeline-item p {
  margin: 0;
}

.note-box {
  border: 1px solid #cfe0ff;
  background: #f3f8ff;
  border-radius: 14px;
  padding: 16px 18px;
  color: #2d4f84;
}

.inline-link {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pricing-grid {
  align-items: stretch;
}

.pricing-card {
  display: grid;
  gap: 10px;
}

.featured-plan {
  border-color: #b7cfff;
  box-shadow: 0 16px 30px rgba(30, 111, 255, 0.15);
}

.price {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.plan-audience {
  font-size: 14px;
  color: var(--muted);
}

.plan-note {
  font-size: 13px;
  color: #4d5b75;
}

.quote-form {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 10px 28px rgba(21, 87, 204, 0.08);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-field {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: #40516f;
}

.form-field-full {
  grid-column: 1 / -1;
}

.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: #9cbcf7;
  box-shadow: 0 0 0 3px rgba(30, 111, 255, 0.12);
}

.cta {
  padding: 32px;
  border-radius: 20px;
  background: linear-gradient(135deg, #1e6fff, #4db8ff);
  color: #fff;
  display: grid;
  gap: 12px;
}

.cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

.footer {
  background: #0f1c36;
  color: #ffffff;
  padding: 40px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
}

.footer small {
  color: rgba(255, 255, 255, 0.55);
  display: inline-block;
}

.footer-meta {
  text-align: center;
  line-height: 1.8;
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
}

@media (max-width: 860px) {
  .header-right {
    gap: 8px;
  }

  .nav {
    position: fixed;
    top: 72px;
    right: 4%;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: 0.2s ease;
    overflow: visible;
  }

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

  .nav-toggle {
    display: inline-flex;
  }

  .timeline-item {
    flex-direction: column;
    align-items: flex-start;
  }

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