:root {
  color-scheme: light;
  --ink: #123532;
  --muted: #5d7471;
  --brand: #0b716b;
  --brand-dark: #084f4b;
  --accent: #ef8b4a;
  --soft: #edf7f5;
  --line: #d7e7e4;
  --paper: #ffffff;
  --shadow: 0 30px 70px rgba(20, 76, 70, 0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
.shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.skip-link { position: fixed; left: 18px; top: -80px; z-index: 100; padding: 10px 16px; color: #fff; background: var(--brand-dark); border-radius: 8px; }
.skip-link:focus { top: 12px; }

.site-header { position: absolute; inset: 0 0 auto; z-index: 10; }
.header-inner { height: 92px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 22px; border-radius: 13px; background: linear-gradient(145deg, var(--brand), #35a69c); box-shadow: 0 12px 30px rgba(11, 113, 107, 0.24); }
.brand-name { display: grid; line-height: 1.15; }
.brand-name strong { font-size: 17px; letter-spacing: .05em; }
.brand-name small { margin-top: 5px; font-size: 9px; letter-spacing: .16em; color: var(--muted); }
.nav { display: flex; align-items: center; gap: 34px; }
.nav a { color: #315854; font-size: 14px; text-decoration: none; }
.nav a:hover, .nav a:focus-visible { color: var(--brand); }

.hero { min-height: 760px; overflow: hidden; background: radial-gradient(circle at 82% 18%, rgba(83, 191, 179, .2), transparent 28%), linear-gradient(180deg, #f3fbf9 0%, #fff 88%); }
.hero-grid { min-height: 760px; padding-top: 128px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 72px; }
.eyebrow, .section-kicker { margin: 0 0 17px; color: var(--brand); font-size: 13px; font-weight: 750; letter-spacing: .16em; }
.hero h1 { margin: 0; max-width: 680px; font-size: clamp(44px, 5.3vw, 70px); line-height: 1.15; letter-spacing: -.045em; }
.hero h1 span { color: var(--brand); }
.hero-summary { max-width: 630px; margin: 26px 0 0; color: var(--muted); font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { min-height: 50px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 14px; font-size: 15px; font-weight: 700; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--brand); box-shadow: 0 16px 34px rgba(11, 113, 107, .23); }
.button-secondary { border-color: var(--line); background: rgba(255,255,255,.74); }
.trust-list { display: flex; flex-wrap: wrap; gap: 18px 30px; margin: 34px 0 0; padding: 0; list-style: none; color: #496965; font-size: 13px; }
.trust-list li::before { content: ""; width: 7px; height: 7px; display: inline-block; margin-right: 9px; border-radius: 50%; background: var(--accent); }

.hero-visual { position: relative; min-height: 520px; display: grid; place-items: center; }
.visual-glow { position: absolute; width: 460px; height: 460px; border-radius: 50%; background: linear-gradient(145deg, rgba(66, 178, 167, .2), rgba(245, 157, 98, .14)); filter: blur(2px); }
.phone-card { position: relative; z-index: 1; width: 280px; height: 510px; display: flex; flex-direction: column; align-items: center; padding: 42px 28px 30px; border: 8px solid #153f3b; border-radius: 46px; background: linear-gradient(180deg, #fff, #eaf7f5); box-shadow: var(--shadow); }
.phone-card::after { content: ""; position: absolute; inset: 10px; pointer-events: none; border: 1px solid rgba(15, 97, 90, .08); border-radius: 32px; }
.phone-top { position: absolute; top: 18px; left: 50%; transform: translateX(-50%); width: 78px; height: 15px; display: flex; align-items: center; justify-content: center; gap: 6px; border-radius: 999px; background: #153f3b; }
.phone-top span:first-child { width: 28px; height: 3px; border-radius: 3px; background: #5b7f7b; }
.phone-top span:last-child { width: 5px; height: 5px; border-radius: 50%; background: #5b7f7b; }
.phone-card img { margin-top: 64px; filter: drop-shadow(0 18px 26px rgba(13, 98, 91, .18)); }
.phone-card strong { margin-top: 28px; font-size: 23px; }
.phone-card p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.signal-row { display: flex; align-items: flex-end; gap: 7px; height: 30px; margin-top: 34px; }
.signal-row i { display: block; width: 8px; border-radius: 8px; background: #28a398; }
.signal-row i:nth-child(1) { height: 8px; opacity: .45; }
.signal-row i:nth-child(2) { height: 14px; opacity: .62; }
.signal-row i:nth-child(3) { height: 21px; opacity: .8; }
.signal-row i:nth-child(4) { height: 28px; }
.floating-note { position: absolute; z-index: 2; display: flex; align-items: center; gap: 9px; padding: 13px 17px; color: #315854; background: rgba(255,255,255,.94); border: 1px solid rgba(18,83,77,.1); border-radius: 13px; box-shadow: 0 16px 40px rgba(20, 76, 70, .13); font-size: 13px; font-weight: 650; }
.floating-note span { width: 22px; height: 22px; display: grid; place-items: center; color: #fff; background: var(--brand); border-radius: 50%; }
.note-one { top: 145px; right: 0; }
.note-two { bottom: 98px; left: -8px; }

.section { padding: 112px 0; }
.section-soft { background: var(--soft); }
.about-grid { display: grid; grid-template-columns: .88fr 1.12fr; gap: 90px; align-items: start; }
.section h2 { margin: 0; font-size: clamp(32px, 3.5vw, 48px); line-height: 1.26; letter-spacing: -.035em; }
.about-copy { padding-top: 10px; }
.about-copy p { margin: 0 0 20px; color: var(--muted); font-size: 17px; }
.section-heading { max-width: 700px; margin-bottom: 44px; }
.section-heading.compact { max-width: 620px; }
.section-heading > p:last-child { margin: 16px 0 0; color: var(--muted); font-size: 17px; }

.product-panel { display: grid; grid-template-columns: .82fr 1.18fr; overflow: hidden; border: 1px solid rgba(10, 89, 83, .1); border-radius: 28px; background: #fff; box-shadow: 0 24px 60px rgba(24, 93, 86, .08); }
.product-brand { min-height: 330px; display: flex; align-items: center; gap: 24px; padding: 48px; background: linear-gradient(145deg, #0a5e59, #159388); color: #fff; }
.product-brand img { flex: 0 0 112px; }
.product-brand span { font-size: 12px; letter-spacing: .14em; opacity: .75; }
.product-brand h3 { margin: 7px 0 5px; font-size: 28px; }
.product-brand p { margin: 0; font-size: 12px; opacity: .72; }
.product-description { align-self: center; padding: 48px 54px; color: var(--muted); }
.product-description p { margin: 0 0 15px; }
.product-links { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 25px; }
.product-links a { color: var(--brand); font-size: 14px; font-weight: 750; text-decoration: none; }
.product-links a::after { content: " →"; }

.principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 48px; }
.principle-grid article { padding: 34px 30px 32px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.principle-grid span { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.principle-grid h3 { margin: 20px 0 10px; font-size: 21px; }
.principle-grid p { margin: 0; color: var(--muted); font-size: 15px; }

.contact-section { padding-top: 40px; }
.contact-panel { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 70px; padding: 58px 64px; color: #fff; border-radius: 30px; background: linear-gradient(135deg, #084f4b, #0d756e); box-shadow: 0 30px 70px rgba(8,79,75,.2); }
.section-kicker.light { color: #8ee1d8; }
.contact-panel h2 { font-size: clamp(30px, 3.2vw, 43px); }
.contact-panel > div > p:last-child { margin: 18px 0 0; color: #c9e4e1; }
.contact-details { display: grid; gap: 14px; }
.contact-details p { margin: 0; padding: 16px 18px; border: 1px solid rgba(255,255,255,.16); border-radius: 14px; background: rgba(255,255,255,.08); }
.contact-details span { display: block; color: #a9d7d2; font-size: 12px; }
.contact-details a, .contact-details strong { font-size: 16px; font-weight: 700; text-decoration: none; }

.site-footer { padding: 42px 0; background: #f7faf9; border-top: 1px solid #e5eeec; }
.footer-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
.footer-inner strong { font-size: 15px; }
.footer-inner p { margin: 7px 0 0; color: #77908d; font-size: 12px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 24px; }
.footer-links a { color: #5c7471; font-size: 12px; text-decoration: none; }
.footer-links a:hover { color: var(--brand); }

@media (max-width: 900px) {
  .nav { gap: 18px; }
  .hero-grid { grid-template-columns: 1fr; padding-top: 150px; padding-bottom: 76px; text-align: center; gap: 40px; }
  .hero-summary { margin-left: auto; margin-right: auto; }
  .hero-actions, .trust-list { justify-content: center; }
  .hero-visual { min-height: 500px; }
  .about-grid, .product-panel, .contact-panel { grid-template-columns: 1fr; }
  .product-brand { min-height: auto; }
  .principle-grid { grid-template-columns: 1fr; }
  .contact-panel { gap: 34px; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 32px, 1160px); }
  .header-inner { height: 76px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-name small { display: none; }
  .nav { display: none; }
  .hero, .hero-grid { min-height: auto; }
  .hero-grid { padding-top: 124px; padding-bottom: 64px; }
  .hero h1 { font-size: 42px; }
  .hero-summary { font-size: 16px; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .trust-list { gap: 10px 18px; }
  .hero-visual { min-height: 430px; transform: scale(.9); margin: -15px 0 -28px; }
  .visual-glow { width: 350px; height: 350px; }
  .phone-card { width: 240px; height: 430px; border-radius: 40px; }
  .phone-card img { width: 132px; margin-top: 45px; }
  .note-one { right: -8px; top: 120px; }
  .note-two { left: -10px; bottom: 72px; }
  .section { padding: 76px 0; }
  .about-grid { gap: 28px; }
  .section h2 { font-size: 34px; }
  .about-copy p, .section-heading > p:last-child { font-size: 16px; }
  .product-brand { padding: 34px 26px; gap: 17px; }
  .product-brand img { width: 80px; flex-basis: 80px; }
  .product-brand h3 { font-size: 23px; }
  .product-description { padding: 30px 26px 34px; }
  .product-links { gap: 12px 20px; }
  .contact-section { padding-top: 0; }
  .contact-panel { width: 100%; padding: 44px 24px; border-radius: 0; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}