:root {
  --ink: #142433;
  --ink-soft: #4a5a6a;
  --teal: #1d7a6d;
  --teal-dark: #156157;
  --teal-light: #e8f4f1;
  --gold: #c4a574;
  --line: #dce6e3;
  --bg: #f5f8f7;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(20, 36, 51, 0.08);
  --radius: 18px;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
}

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

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

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(245, 248, 247, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--teal), #2ea08d);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 18px;
}

.brand small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--ink-soft);
  font-size: 15px;
}

.nav a:hover,
.nav a.is-active {
  color: var(--teal-dark);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
  transition: 0.2s ease;
}

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

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

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  padding: 72px 0 40px;
}

.info-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.info-cards .card span {
  color: var(--ink-soft);
  font-size: 13px;
}

.info-cards .card h3 {
  margin: 8px 0 0;
  font-size: 18px;
  font-weight: 600;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  color: var(--teal);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.lead {
  margin: 18px 0 28px;
  color: var(--ink-soft);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.hero-meta strong {
  display: block;
  font-size: 22px;
}

.hero-meta span {
  color: var(--ink-soft);
  font-size: 13px;
}

.hero-card {
  background: linear-gradient(180deg, #fff, #eef6f3);
  border: 1px solid #e3eeea;
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.phone {
  aspect-ratio: 9 / 16;
  max-width: 280px;
  margin: 0 auto;
  border-radius: 36px;
  background: #102029;
  padding: 14px;
  color: #fff;
}

.phone-screen {
  height: 100%;
  border-radius: 24px;
  background:
    radial-gradient(circle at 30% 20%, rgba(196, 165, 116, 0.35), transparent 28%),
    linear-gradient(180deg, #1f7a6d 0%, #14353f 100%);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.phone-screen h3 {
  margin: 80px 0 8px;
  font-size: 28px;
  font-weight: 600;
}

.phone-screen p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.breath {
  width: 92px;
  height: 92px;
  margin: 0 auto;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  animation: pulse 4.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(0.86); opacity: 0.65; }
  50% { transform: scale(1.08); opacity: 1; }
}

.section {
  padding: 72px 0;
}

.section-head {
  max-width: 640px;
  margin-bottom: 36px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: 32px;
}

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

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.card h3 {
  margin: 16px 0 8px;
  font-size: 20px;
}

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

.icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--teal-light);
  color: var(--teal-dark);
  display: grid;
  place-items: center;
  font-size: 22px;
}

.about-grid,
.contact-grid,
.product-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: start;
}

.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 32px;
}

.list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 12px;
  color: var(--ink-soft);
}

.list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.cta {
  background: linear-gradient(135deg, #14353f, #1d7a6d);
  color: #fff;
  border-radius: 28px;
  padding: 48px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.cta p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer {
  background: #152028;
  color: rgba(255, 255, 255, 0.58);
  padding: 72px 0 28px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.1fr;
  gap: 40px 64px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer h3,
.site-footer h4 {
  color: #fff;
  margin: 0 0 16px;
}

.site-footer h3 {
  font-size: 18px;
  letter-spacing: 0.08em;
}

.site-footer h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.42);
}

.site-footer p {
  margin: 0 0 8px;
}

.footer-brand p {
  max-width: 22em;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

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

.icp {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 20px;
  text-align: left;
  font-size: 13px;
}

.icp a {
  color: #d4e8e3;
}

.product-hero-media {
  margin: 0;
}

.product-hero-media img {
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  border-radius: 28px;
  box-shadow: var(--shadow);
  background: #fdecec;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 10px;
  background: #fff;
}

.page-hero h1 {
  margin: 0 0 10px;
  font-size: 40px;
}

.legal {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 40px;
}

.legal h2 {
  font-size: 20px;
  margin: 32px 0 12px;
}

.legal h3 {
  font-size: 16px;
  margin: 22px 0 8px;
}

.legal p,
.legal li {
  color: var(--ink-soft);
}

.legal-body {
  white-space: pre-wrap;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.9;
}

.contact-item {
  margin-bottom: 18px;
}

.contact-item span {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
}

.contact-item strong {
  font-size: 18px;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    left: 20px;
    right: 20px;
    top: 76px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
    box-shadow: var(--shadow);
  }

  .nav.is-open {
    display: flex;
  }

  .hero-grid,
  .about-grid,
  .contact-grid,
  .product-grid,
  .cards,
  .info-cards,
  .footer-grid,
  .cta {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 24px;
  }

  .footer-nav h4 {
    grid-column: 1 / -1;
  }

  .hero,
  .section {
    padding: 40px 0;
  }

  .cta,
  .legal,
  .panel {
    padding: 24px;
  }
}