/* 扬州启唯 — 浅色玻璃风；字体仅用本机系统栈，不加载外链字体 */

:root {
  --bg-page: #e8ecf3;
  --bg-section: linear-gradient(180deg, #f7f8fc 0%, #eef1f7 100%);
  --glass: rgba(255, 255, 255, 0.64);
  --glass-border: rgba(255, 255, 255, 0.95);
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.12);
  --shadow-soft: 0 20px 50px rgba(29, 48, 80, 0.08);
  --shadow-card: 0 16px 40px rgba(29, 48, 80, 0.1);
  --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1120px;
  --radius: 22px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 90% 70% at 18% 8%, rgba(212, 228, 255, 0.9) 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 88% 22%, rgba(220, 232, 252, 0.55) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 40% 95%, rgba(228, 235, 245, 0.7) 0%, transparent 45%);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(100% - 1.5rem, var(--max-width));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
}

/* 顶栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset, 0 8px 32px rgba(29, 48, 80, 0.06);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--accent);
}

.logo__mark {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), #5ac8fa);
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.35);
}

.logo__text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.2;
}

.logo__name {
  font-weight: 600;
  font-size: clamp(1rem, 2.4vw, 1.125rem);
  letter-spacing: 0.02em;
}

.logo__tag {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  color: var(--text);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.75rem;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.35rem 0;
  position: relative;
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width 0.2s ease;
}

.nav a:hover::after {
  width: 100%;
}

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

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1rem 1rem;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(20px);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease, visibility 0.25s;
  }

  .nav.nav--open {
    max-height: 200px;
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  }

  .nav a:last-child {
    border-bottom: none;
  }

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

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  padding: clamp(2rem, 6vw, 3.25rem) 0 clamp(2.5rem, 8vw, 4rem);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
  align-items: center;
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 1.05fr);
  }
}

.hero__copy {
  position: relative;
}

.hero__eyebrow {
  margin: 0 0 1rem;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(29, 48, 80, 0.06);
}

.hero__title {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.hero__tagline {
  margin: 0;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  color: var(--text-muted);
  max-width: 28em;
}

.hero__cta {
  margin-top: 1.75rem;
}

.hero__visual {
  margin: 0;
  border-radius: clamp(20px, 3vw, 32px);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
  background: rgba(255, 255, 255, 0.4);
}

.hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.65rem;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 24px rgba(0, 113, 227, 0.35);
}

.btn-primary:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(0, 113, 227, 0.4);
}

/* 区块 */
.section {
  position: relative;
  z-index: 1;
  padding: clamp(2.75rem, 8vw, 4.25rem) 0;
}

.section--alt {
  background: var(--bg-section);
  border-block: 1px solid rgba(0, 0, 0, 0.04);
}

.section-kicker {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-desc {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  max-width: 36em;
}

.about-panel {
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius);
  max-width: 40em;
}

.about-text {
  margin: 0;
  color: var(--text);
}

/* 业务卡片 */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1.1rem;
}

.card {
  position: relative;
  padding: 1.5rem 1.4rem;
  border-radius: var(--radius);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 48px rgba(29, 48, 80, 0.12);
}

.card__icon {
  display: inline-block;
  margin-bottom: 0.85rem;
  font-size: 0.65rem;
  color: var(--accent);
  opacity: 0.85;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* 页脚 */
.site-footer {
  position: relative;
  z-index: 1;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(249, 250, 252, 0.9);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer .company {
  margin: 0 0 0.25rem;
  color: var(--text);
  font-weight: 600;
}

.footer__meta {
  margin: 0;
}

.footer__legal {
  margin: 0;
  align-self: flex-end;
}

.footer__legal a {
  color: var(--text-muted);
}

.footer__legal a:hover {
  color: var(--accent);
}