:root {
  --primary: #00A8E8;
  --primary-dark: #123047;
  --secondary: #0F766E;
  --accent: #FF7A45;
  --background: #F3FBFC;
  --surface: #FFFFFF;
  --soft-cyan: #E8F8FC;
  --soft-mint: #EAF8F4;
  --text: #123047;
  --muted: #587083;
  --border: #CFE8EC;
  --shadow: 0 18px 48px rgba(18, 48, 71, .09);
  --radius: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(0, 168, 232, .13);
  box-shadow: 0 8px 30px rgba(18, 48, 71, .04);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand-link { display: inline-flex; align-items: center; min-height: 44px; flex: 0 1 300px; border-radius: 12px; }
.brand-link img { width: 300px; height: auto; }
.business-nav { display: flex; align-items: center; gap: 6px; padding: 5px; background: var(--soft-cyan); border-radius: 14px; }
.business-nav a { padding: 9px 13px; color: var(--primary-dark); font-weight: 700; text-decoration: none; border-radius: 10px; transition: color .2s ease, background .2s ease, transform .2s ease; }
.business-nav a:hover { color: var(--secondary); background: var(--surface); }
.business-nav .nav-action { color: #FFFFFF; background: var(--accent); box-shadow: 0 7px 18px rgba(255, 122, 69, .24); }
.business-nav .nav-action:hover { color: #FFFFFF; background: #E96838; transform: translateY(-1px); }
a:focus-visible { outline: 3px solid rgba(255, 122, 69, .5); outline-offset: 3px; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 86px 0 74px;
  background:
    radial-gradient(circle at 10% 12%, rgba(0, 168, 232, .18), transparent 30%),
    radial-gradient(circle at 88% 72%, rgba(15, 118, 110, .14), transparent 30%),
    linear-gradient(135deg, #FFFFFF 0%, #F1FCFD 52%, #EAF8F4 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .38;
  pointer-events: none;
  background-image: radial-gradient(rgba(0, 168, 232, .28) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(90deg, transparent 12%, #000 75%, transparent);
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(320px, .82fr); gap: 64px; align-items: center; }
.eyebrow { display: inline-block; color: var(--secondary); font-size: 14px; font-weight: 900; letter-spacing: .13em; }
.hero h1 { margin: 14px 0 20px; color: var(--primary-dark); font-size: clamp(44px, 6vw, 76px); line-height: 1.05; letter-spacing: -.045em; }
.hero h1::first-letter { color: var(--primary); }
.hero-lead { max-width: 680px; margin: 0; color: var(--muted); font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 28px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 12px 22px; font-weight: 800; text-decoration: none; border: 1px solid transparent; border-radius: 12px; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #FFFFFF; background: linear-gradient(135deg, var(--primary), #078CC7); box-shadow: 0 12px 28px rgba(0, 168, 232, .24); }
.button-secondary { color: var(--secondary); background: var(--surface); border-color: #A8DDD9; }
.button-ghost { color: var(--secondary); background: var(--soft-mint); border-color: #BDE4DE; }
.button-wide { width: 100%; margin-top: 10px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 0; padding: 0; color: var(--muted); list-style: none; }
.hero-points li::before { content: "+"; display: inline-grid; width: 20px; height: 20px; place-items: center; margin-right: 7px; color: #FFFFFF; background: var(--secondary); border-radius: 50%; font-weight: 900; line-height: 1; }
.hero-entry { padding: 30px; background: rgba(255, 255, 255, .94); border: 1px solid rgba(0, 168, 232, .2); border-radius: 28px 8px 28px 28px; box-shadow: 0 24px 60px rgba(18, 48, 71, .13); }
.entry-icon { width: 60px; height: 60px; display: grid; place-items: center; margin-bottom: 18px; color: #FFFFFF; background: linear-gradient(135deg, var(--secondary), #14A896); border-radius: 18px 6px 18px 18px; }
.entry-icon svg { width: 34px; fill: none; stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.entry-kicker { color: var(--accent); font-weight: 900; }
.hero-entry h2 { margin: 4px 0 10px; color: var(--primary-dark); font-size: 29px; }
.hero-entry p { margin: 0 0 8px; color: var(--muted); }
.hero-entry small { display: block; margin-top: 16px; color: #6B7F8D; }

.section { padding: 82px 0; }
.section-heading { max-width: 750px; margin: 0 auto 36px; text-align: center; }
.section-heading.align-left { margin-left: 0; text-align: left; }
.section-heading h2, .notice h2, .cta h2 { margin: 7px 0 12px; color: var(--primary-dark); font-size: clamp(29px, 4vw, 42px); line-height: 1.24; }
.section-heading p, .notice p { margin: 0; color: var(--muted); }

.products { background: var(--surface); }
.price-notice { margin: 0 0 26px; padding: 15px 19px; color: #8A421E; background: #FFF4ED; border: 1px solid #FFD3BE; border-left: 5px solid var(--accent); border-radius: 12px; }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 17px; }
.product-card { min-width: 0; display: flex; flex-direction: column; padding: 12px; color: var(--text); background: #FFFFFF; border: 1px solid var(--border); border-radius: 17px; text-decoration: none; box-shadow: 0 8px 22px rgba(18, 48, 71, .055); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.product-card:hover { transform: translateY(-5px); border-color: #74D0D8; box-shadow: 0 18px 34px rgba(18, 48, 71, .12); }
.product-image { aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; background: linear-gradient(145deg, #F7FCFD, #FFFFFF); border: 1px solid #E3F0F2; border-radius: 12px; }
.product-image img { width: 100%; height: 100%; object-fit: contain; transition: transform .25s ease; }
.product-card:hover .product-image img { transform: scale(1.035); }
.product-name { margin-top: 12px; color: var(--primary-dark); font-weight: 900; }
.product-price { margin-top: 3px; color: var(--accent); font-size: 18px; font-weight: 900; }
.product-link { margin-top: 8px; color: var(--secondary); font-size: 14px; font-weight: 800; }

.positioning { background: var(--background); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 17px; }
.feature-card { position: relative; overflow: hidden; padding: 26px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 9px 26px rgba(18, 48, 71, .045); }
.feature-card::after { content: ""; position: absolute; width: 90px; height: 90px; right: -42px; bottom: -48px; background: var(--soft-cyan); border-radius: 50%; }
.feature-card span { width: 45px; height: 45px; display: grid; place-items: center; color: #FFFFFF; background: linear-gradient(135deg, var(--primary), var(--secondary)); border-radius: 14px 5px 14px 14px; font-weight: 900; }
.feature-card h3 { margin: 18px 0 7px; color: var(--primary-dark); }
.feature-card p { margin: 0; color: var(--muted); }

.scenarios { background: var(--surface); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 17px; }
.scenario-grid article { padding: 25px; background: linear-gradient(145deg, var(--soft-mint), #FFFFFF); border: 1px solid #C8E9E4; border-top: 4px solid var(--secondary); border-radius: var(--radius); }
.scenario-grid article:nth-child(even) { background: linear-gradient(145deg, var(--soft-cyan), #FFFFFF); border-color: #CDECF3; border-top-color: var(--primary); }
.scenario-grid strong { color: var(--primary-dark); font-size: 20px; }
.scenario-grid p { margin: 8px 0 0; color: var(--muted); }

.process { background: var(--background); }
.process-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 17px; margin: 0; padding: 0; list-style: none; }
.process-list li { display: flex; gap: 15px; padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.process-list > li > span { flex: 0 0 42px; height: 42px; display: grid; place-items: center; color: #FFFFFF; background: var(--accent); border-radius: 13px 4px 13px 13px; font-weight: 900; }
.process-list h3 { margin: 3px 0 6px; color: var(--primary-dark); }
.process-list p { margin: 0; color: var(--muted); }

.notice { background: linear-gradient(120deg, #E8F8FC, #EAF8F4); }
.notice-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 62px; align-items: center; }
.notice ul { display: grid; gap: 11px; margin: 0; padding: 0; list-style: none; }
.notice li { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 15px 18px; background: rgba(255, 255, 255, .88); border: 1px solid #BFE3E5; border-radius: 13px; }
.notice strong { color: var(--secondary); }
.notice li span { color: var(--muted); }

.faq { background: var(--surface); }
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
.faq-grid article { padding: 24px; background: #F8FCFD; border: 1px solid var(--border); border-radius: 16px; }
.faq-grid h3 { margin: 0 0 8px; color: var(--primary-dark); font-size: 18px; }
.faq-grid p { margin: 0; color: var(--muted); }

.cta { color: #FFFFFF; background: linear-gradient(115deg, #123047, #0F766E); }
.cta-inner { display: flex; justify-content: space-between; gap: 30px; align-items: center; }
.cta h2 { color: #FFFFFF; }
.cta p { margin: 0; color: #D7F3F0; }
.eyebrow-light { color: #7DE7DB; }
.button-light { flex: 0 0 auto; color: var(--primary-dark); background: #FFFFFF; }

.site-footer { padding: 42px 0 22px; color: #C7DFE1; background: #0A2635; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr auto; gap: 34px; align-items: center; }
.footer-grid img { width: 270px; padding: 8px 10px; background: #FFFFFF; border-radius: 11px; }
.footer-grid p { margin: 9px 0 0; }
.footer-grid a { display: inline-flex; align-items: center; min-height: 44px; color: #FFFFFF; font-weight: 900; text-underline-offset: 4px; }
.footer-bottom { margin-top: 30px; padding-top: 18px; border-top: 1px solid #28495A; font-size: 14px; }

@media (max-width: 960px) {
  .header-inner { padding: 12px 0; align-items: flex-start; flex-direction: column; gap: 8px; }
  .brand-link { flex-basis: auto; }
  .business-nav { width: 100%; overflow-x: auto; padding-bottom: 5px; }
  .business-nav a { white-space: nowrap; }
  .hero { padding-top: 54px; }
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero-entry { max-width: 620px; }
  .feature-grid, .scenario-grid, .process-list { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .notice-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 620px) {
  .container { width: min(100% - 24px, 1180px); }
  .site-header { position: static; }
  .header-inner { min-height: auto; }
  .brand-link img { width: 252px; }
  .business-nav { gap: 4px; border-radius: 12px; }
  .business-nav a { min-height: 44px; padding: 10px; font-size: 14px; }
  .hero { padding: 44px 0 50px; }
  .hero h1 { font-size: 44px; }
  .hero-lead { font-size: 17px; }
  .hero-actions { display: grid; }
  .hero-entry { padding: 24px; border-radius: 22px 7px 22px 22px; }
  .section { padding: 60px 0; }
  .feature-grid, .scenario-grid, .process-list, .faq-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .product-card { padding: 9px; border-radius: 14px; }
  .product-image { border-radius: 10px; }
  .product-name { min-height: 48px; font-size: 15px; }
  .product-price { font-size: 16px; }
  .product-link { font-size: 13px; }
  .notice li { grid-template-columns: 1fr; gap: 3px; }
  .cta-inner, .footer-grid { display: grid; grid-template-columns: 1fr; }
  .button-light { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}