:root {
  --ink: #14283a;
  --ink-soft: #30495c;
  --paper: #f7f8f4;
  --white: #ffffff;
  --line: #d7dfdc;
  --muted: #64746f;
  --mint: #66d7c6;
  --mint-pale: #dbf4ee;
  --coral: #ff8064;
  --coral-pale: #ffe1d8;
  --sun: #f5cf64;
  --sun-pale: #fff2c7;
  --sky: #b9dded;
  --shadow: 0 22px 48px rgba(20, 40, 58, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 248, 244, 0.93);
  border-bottom: 1px solid rgba(20, 40, 58, 0.08);
  backdrop-filter: blur(14px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { width: 140px; flex: 0 0 auto; }
.brand img { width: 140px; height: auto; }
.nav-links { display: flex; align-items: center; justify-content: center; gap: 32px; flex: 1; }
.nav-links a, .nav-policy, .footer-links a { text-decoration: none; font-size: 14px; font-weight: 700; }
.nav-links a { color: var(--ink-soft); }
.nav-links a:hover, .footer-links a:hover, .text-link:hover { color: var(--coral); }
.nav-policy { padding: 8px 14px; border: 1px solid var(--ink); border-radius: 4px; }
.nav-policy:hover, .nav-policy.active { color: var(--white); background: var(--ink); }

.hero { overflow: hidden; background: var(--ink); color: var(--white); }
.hero-grid { min-height: 650px; display: grid; grid-template-columns: 1.02fr 0.98fr; align-items: center; gap: 56px; }
.hero-copy { padding: 96px 0; position: relative; z-index: 1; }
.eyebrow, .section-kicker { margin: 0 0 12px; color: var(--coral); font-size: 13px; font-weight: 800; line-height: 1.3; }
.hero h1 { margin: 0; font-size: 72px; line-height: 1.15; font-weight: 800; }
.hero-slogan { margin: 7px 0 24px; color: var(--mint); font-size: 26px; font-weight: 700; }
.hero-intro { max-width: 480px; margin: 0; color: #d6e0e4; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 22px; border: 1px solid transparent; border-radius: 4px; text-decoration: none; font-size: 15px; font-weight: 800; }
.button-primary { background: var(--mint); color: var(--ink); }
.button-primary:hover { background: #8de3d6; }
.button-secondary { color: var(--white); border-color: rgba(255, 255, 255, 0.7); }
.button-secondary:hover { background: rgba(255, 255, 255, 0.1); }
.availability { margin: 18px 0 0; color: #a9bbc3; font-size: 13px; }
.hero-visual { align-self: center; position: relative; display: flex; justify-content: center; }
.hero-panel { position: absolute; top: 50%; right: -80px; width: 420px; height: 320px; background: var(--coral); border-radius: 50% 50% 0 0; opacity: 0.9; transform: translateY(-50%); }
.hero-visual img { position: relative; z-index: 1; width: 100%; height: auto; border: 8px solid rgba(255, 255, 255, 0.9); border-radius: 5px; object-fit: contain; filter: drop-shadow(0 24px 28px rgba(0, 0, 0, 0.28)); }

.section { padding: 108px 0; }
.about-section { background: var(--white); }
.section-split { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 80px; }
h2 { margin: 0; max-width: 640px; font-size: 42px; line-height: 1.28; font-weight: 800; }
.prose { color: var(--ink-soft); font-size: 17px; }
.prose p:first-child { margin-top: 0; }
.prose p:last-child { margin-bottom: 0; }

.features-section { background: var(--paper); }
.features-section h2 { margin-bottom: 42px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.feature-card { min-height: 256px; padding: 26px; border-radius: 6px; }
.feature-card-mint { background: var(--mint-pale); }
.feature-card-coral { background: var(--coral-pale); }
.feature-card-sun { background: var(--sun-pale); }
.feature-card-sky { background: var(--sky); }
.feature-number { display: block; color: var(--ink-soft); font-size: 13px; font-weight: 800; }
.feature-card h3 { margin: 58px 0 12px; font-size: 22px; line-height: 1.3; }
.feature-card p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.75; }

.product-section { background: var(--white); }
.circle-section { background: var(--paper); }
.product-grid { display: grid; grid-template-columns: 1.12fr 0.88fr; gap: 72px; align-items: center; }
.product-grid-reverse { grid-template-columns: 0.88fr 1.12fr; }
.product-media { overflow: hidden; background: #d9e8e6; border-radius: 6px; box-shadow: var(--shadow); }
.product-media-wide { aspect-ratio: 3 / 2; }
.product-media-wide img { width: 100%; height: 100%; object-fit: cover; }
.product-media-phone { justify-self: end; width: min(100%, 430px); max-height: 600px; background: transparent; box-shadow: none; }
.product-media-phone img { width: 100%; max-height: 600px; object-fit: contain; object-position: right center; }
.product-copy p:not(.section-kicker) { margin: 22px 0 0; color: var(--ink-soft); font-size: 17px; }
.check-list { margin: 26px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; margin: 11px 0; padding-left: 27px; font-size: 15px; font-weight: 700; }
.check-list li::before { content: ""; position: absolute; left: 0; top: 9px; width: 12px; height: 6px; border-left: 2px solid var(--coral); border-bottom: 2px solid var(--coral); transform: rotate(-45deg); }
.text-link { display: inline-block; margin-top: 26px; color: var(--ink); font-size: 15px; font-weight: 800; text-decoration: none; border-bottom: 1px solid currentColor; }

.flow-section { padding: 96px 0; background: var(--mint-pale); }
.flow-wrap { display: grid; grid-template-columns: 0.82fr 1.18fr; gap: 56px; align-items: center; }
.flow-copy p:not(.section-kicker) { color: var(--ink-soft); font-size: 16px; }
.flow-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.flow-steps li { min-height: 150px; padding: 22px; background: var(--white); border: 1px solid rgba(20, 40, 58, 0.08); border-radius: 5px; }
.flow-steps span { display: block; color: var(--coral); font-size: 13px; font-weight: 800; }
.flow-steps strong { display: block; margin: 24px 0 6px; color: var(--ink); font-size: 18px; line-height: 1.35; }
.flow-steps small { display: block; color: var(--ink-soft); font-size: 13px; line-height: 1.65; }

.contact-section { padding: 82px 0; background: var(--coral); }
.contact-wrap { display: flex; align-items: end; justify-content: space-between; gap: 48px; }
.contact-wrap .section-kicker { color: var(--ink); }
.contact-wrap h2 { max-width: 520px; }
.contact-wrap p:not(.section-kicker) { max-width: 620px; margin: 20px 0 0; color: var(--ink-soft); font-size: 16px; }
.contact-email { color: var(--ink); font-size: 20px; font-weight: 800; text-decoration: none; border-bottom: 2px solid var(--ink); white-space: nowrap; }

.site-footer { padding: 38px 0 0; color: #d6e0e4; background: var(--ink); }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-bottom: 30px; border-bottom: 1px solid rgba(255, 255, 255, 0.18); }
.footer-logo { width: 135px; filter: brightness(0) invert(1); }
.footer-links { display: flex; gap: 24px; }
.footer-details { display: flex; flex-wrap: wrap; gap: 4px 22px; padding: 26px 0; color: #bbcad0; font-size: 13px; }
.footer-details p { margin: 0; }
.footer-details a { color: var(--mint); text-decoration: none; }
.footer-bottom { padding: 16px 0 20px; color: #8ca2ad; border-top: 1px solid rgba(255, 255, 255, 0.12); font-size: 12px; }

.policy-main { padding: 68px 0 90px; }
.policy-paper { width: min(920px, calc(100% - 48px)); margin: 0 auto; padding: 56px 64px; background: var(--white); border: 1px solid var(--line); border-radius: 6px; }
.policy-paper > h1 { margin: 0; font-size: 42px; line-height: 1.3; }
.policy-date { margin: 10px 0 30px; color: var(--muted); font-size: 14px; }
.policy-lead { padding: 20px; margin: 0 0 40px; color: var(--ink-soft); background: var(--mint-pale); border-left: 4px solid var(--mint); }
.policy-paper section { margin-top: 38px; }
.policy-paper h2 { font-size: 25px; }
.policy-paper p, .policy-paper li { color: var(--ink-soft); font-size: 15px; }
.policy-paper ul { padding-left: 22px; }
.policy-paper li { margin: 10px 0; }
.policy-paper strong { color: var(--ink); }
.policy-paper a { color: #136d74; font-weight: 700; }
.table-wrap { overflow-x: auto; margin-top: 18px; border: 1px solid var(--line); }
table { width: 100%; min-width: 650px; border-collapse: collapse; text-align: left; }
th, td { padding: 13px 15px; vertical-align: top; border-bottom: 1px solid var(--line); font-size: 14px; line-height: 1.6; }
th { color: var(--ink); background: #edf2ef; font-weight: 800; }
tr:last-child td { border-bottom: 0; }
.compact-footer { padding-top: 0; }

@media (max-width: 900px) {
  .hero-grid, .section-split, .product-grid, .product-grid-reverse, .flow-wrap { grid-template-columns: 1fr; }
  .hero-grid { min-height: auto; gap: 0; }
  .hero-copy { padding: 76px 0 28px; }
  .hero-visual { width: min(100%, 640px); justify-self: center; margin-bottom: 60px; }
  .hero-panel { right: 50%; top: 50%; width: 340px; height: 280px; transform: translate(50%, -50%); }
  .section-split, .product-grid, .product-grid-reverse, .flow-wrap { gap: 38px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .product-media-phone { justify-self: center; grid-row: 2; }
  .flow-steps { width: min(100%, 640px); justify-self: center; }
  .contact-wrap { align-items: start; flex-direction: column; gap: 24px; }
}

@media (max-width: 650px) {
  .container { width: min(100% - 32px, 1120px); }
  .site-header { position: static; }
  .nav-wrap { min-height: 66px; gap: 14px; }
  .brand, .brand img { width: 104px; }
  .nav-links { display: none; }
  .nav-policy { margin-left: auto; padding: 6px 10px; font-size: 13px; }
  .hero h1 { font-size: 52px; }
  .hero-slogan { font-size: 22px; }
  .hero-intro { font-size: 16px; }
  .hero-visual { margin-bottom: 40px; }
  .hero-panel { width: 275px; height: 220px; }
  .section { padding: 72px 0; }
  h2 { font-size: 31px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 210px; }
  .feature-card h3 { margin-top: 32px; }
  .product-copy p:not(.section-kicker), .prose { font-size: 16px; }
  .product-media-wide { aspect-ratio: 4 / 3; }
  .flow-steps { grid-template-columns: 1fr; }
  .flow-section { padding: 70px 0; }
  .contact-section { padding: 64px 0; }
  .contact-email { font-size: 16px; }
  .footer-top { align-items: start; flex-direction: column; gap: 18px; }
  .footer-details { display: block; padding: 20px 0; }
  .footer-details p { margin: 6px 0; }
  .policy-main { padding: 32px 0 48px; }
  .policy-paper { width: min(100% - 24px, 920px); padding: 30px 20px; }
  .policy-paper > h1 { font-size: 31px; }
  .policy-paper h2 { font-size: 22px; }
}