:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-soft: #f2f4f8;
  --text: #0f1a2e;
  --muted: #60708f;
  --accent: #1870ff;
  --accent-strong: #0a4dc5;
  --border: #dbe3ef;
  --shadow-soft: 0 15px 40px rgba(31, 52, 94, 0.08);
  --shadow-card: 0 18px 34px rgba(15, 26, 46, 0.09);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 8%, #e4efff 0%, transparent 38%),
    radial-gradient(circle at 82% 10%, #d8f4ff 0%, transparent 36%),
    linear-gradient(180deg, #f8fbff 0%, #f0f4fb 70%, #ecf1f9 100%);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(248, 251, 255, 0.72);
  border-bottom: 1px solid rgba(200, 214, 235, 0.65);
}

.topbar__inner {
  width: min(1120px, 92vw);
  margin: 0 auto;
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
}

.topbar__brand {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: #31466e;
  font-weight: 700;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.language-switch select {
  border: 1px solid #c6d5ee;
  background: rgba(255, 255, 255, 0.7);
  color: #173567;
  border-radius: 999px;
  height: 34px;
  min-width: 120px;
  padding: 0 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.topbar__link {
  text-decoration: none;
  color: #173567;
  font-size: 0.92rem;
  font-weight: 600;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero {
  position: relative;
  min-height: 74vh;
  display: grid;
  place-items: center;
  padding: 4.6rem 1rem 3.2rem;
  text-align: center;
}

.hero__halo {
  position: absolute;
  width: min(78vw, 900px);
  aspect-ratio: 16 / 9;
  border-radius: 44px;
  background:
    linear-gradient(145deg, rgba(15, 58, 128, 0.13), rgba(12, 165, 194, 0.12)),
    rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow-soft);
  filter: blur(0.2px);
}

.hero__content {
  position: relative;
  max-width: 860px;
}

.hero__eyebrow {
  margin: 0;
  color: #36517c;
  font-size: 0.84rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
}

.hero h1 {
  margin: 0.8rem 0 0;
  font-size: clamp(2.1rem, 5.8vw, 4.85rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero__desc {
  margin: 1.3rem auto 1.55rem;
  width: min(86vw, 640px);
  color: #4f6285;
  font-size: clamp(0.98rem, 1.85vw, 1.15rem);
  line-height: 1.78;
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  height: 42px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn--solid {
  background: linear-gradient(120deg, var(--accent) 0%, #36a7ff 95%);
  color: #fff;
  box-shadow: 0 10px 24px rgba(24, 112, 255, 0.28);
}

.btn--ghost {
  color: #0d2e67;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid #c5d5f0;
}

main {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding: 1.3rem 0 3rem;
}

.section {
  margin-top: 2.2rem;
}

.section__header h2 {
  margin-bottom: 0.35rem;
  font-size: clamp(1.5rem, 3.3vw, 2.2rem);
  letter-spacing: -0.02em;
}

.section__header p {
  margin-top: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.product-grid {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
}

.product {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid #dce5f1;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transform: translateY(20px);
  opacity: 0;
  animation: rise-in 0.6s ease forwards;
}

.product img {
  width: 100%;
  height: 188px;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.product img.product__image--illustration {
  object-fit: cover;
  background: transparent;
  padding: 0;
}

.product__body {
  padding: 1rem 1.05rem 1.08rem;
}

.product__name {
  margin: 0;
  font-size: 1.16rem;
  letter-spacing: -0.01em;
}

.product__meta {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.64;
}

.product__price {
  margin-top: 0.78rem;
  font-size: 1.3rem;
  color: #0d57d4;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.contact__card {
  border: 1px solid #cfdbeb;
  background: linear-gradient(150deg, #f8fbff 0%, #eef5ff 100%);
  box-shadow: var(--shadow-soft);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.25rem;
  line-height: 2;
  font-size: 1rem;
}

.contact__card strong {
  color: #0e4cb2;
}

.contact__card a {
  color: #1157ca;
  text-decoration: none;
}

.footer {
  border-top: 1px solid #d8e2f1;
  text-align: center;
  color: #62738f;
  padding: 1.1rem;
  font-size: 0.88rem;
}

@keyframes rise-in {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 640px) {
  .topbar__inner {
    min-height: 52px;
    flex-wrap: wrap;
    padding: 0.45rem 0;
    justify-content: center;
  }

  .topbar__brand {
    width: 100%;
    text-align: center;
  }

  .topbar__actions {
    width: 100%;
    justify-content: center;
  }

  .hero {
    min-height: 74vh;
    padding: 2.4rem 0.9rem 2rem;
    overflow: hidden;
    background:
      radial-gradient(circle at 18% 14%, rgba(255, 196, 130, 0.48) 0%, transparent 43%),
      radial-gradient(circle at 82% 20%, rgba(255, 152, 102, 0.36) 0%, transparent 40%),
      linear-gradient(180deg, #fff2de 0%, #ffe8ca 48%, #ffe2bf 100%);
  }

  .hero__halo {
    display: block;
    width: 140vw;
    aspect-ratio: auto;
    height: 118%;
    top: -6%;
    left: -20%;
    border-radius: 0;
    background:
      radial-gradient(circle at 15% 16%, rgba(255, 165, 87, 0.28) 0%, transparent 44%),
      radial-gradient(circle at 72% 33%, rgba(255, 116, 92, 0.24) 0%, transparent 42%),
      linear-gradient(135deg, rgba(206, 84, 28, 0.24) 0%, rgba(255, 153, 76, 0.2) 100%);
    box-shadow: none;
    filter: none;
  }

  .hero__content {
    width: min(92vw, 560px);
    margin: 0 auto;
    border: 1px solid rgba(255, 182, 123, 0.66);
    border-radius: 26px;
    padding: 1.2rem 0.95rem 1.1rem;
    background: linear-gradient(
      160deg,
      rgba(255, 249, 241, 0.92) 0%,
      rgba(255, 236, 210, 0.82) 100%
    );
    box-shadow: 0 18px 36px rgba(124, 53, 17, 0.16);
  }

  .hero__eyebrow {
    color: #8c4417;
  }

  .hero h1 {
    margin-top: 0.5rem;
    font-size: clamp(2rem, 10.5vw, 2.8rem);
    line-height: 1.08;
    color: #1f1b16;
  }

  .hero__desc {
    margin: 0.82rem auto 0;
    width: min(86vw, 520px);
    font-size: 0.95rem;
    line-height: 1.58;
    color: #724931;
  }

  .hero__actions {
    margin-top: 1rem;
    flex-direction: column;
    align-items: center;
    gap: 0.58rem;
  }

  .btn {
    width: min(300px, 82vw);
    height: 40px;
    margin: 0 auto;
  }

  .btn--solid {
    background: linear-gradient(120deg, #ef5b20 0%, #f59e0b 96%);
    color: #fffdf8;
    box-shadow: 0 10px 24px rgba(213, 88, 31, 0.34);
  }

  .btn--ghost {
    color: #7a3b15;
    background: rgba(255, 248, 240, 0.86);
    border: 1px solid #f2be92;
  }

  .product img {
    height: 172px;
  }

  .product img.product__image--illustration {
    padding: 0;
  }
}