:root {
  --primary: #2563EB;
  --primary-dark: #1E3A5F;
  --accent: #F59E0B;
  --background: #F8FAFC;
  --text: #1F2937;
  --muted: #475569;
  --border: #E2E8F0;
  --white: #FFFFFF;
  --shadow: 0 18px 45px rgba(30, 58, 95, .09);
  --radius: 22px;
}
* { 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,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand-link { flex: 0 1 320px; border-radius: 10px; }
.brand-link img { width: 320px; height: auto; }
.business-nav { display: flex; align-items: center; gap: 8px; }
.business-nav a { padding: 10px 13px; color: var(--primary-dark); font-weight: 600; text-decoration: none; border-radius: 10px; }
.business-nav a:hover { color: var(--primary); background: #EFF6FF; }
.business-nav .nav-action { color: var(--white); background: var(--primary); }
.business-nav .nav-action:hover { color: var(--white); background: #1D4ED8; }
a:focus-visible { outline: 3px solid rgba(245, 158, 11, .55); outline-offset: 3px; }
.hero { position: relative; overflow: hidden; padding: 88px 0 76px; background: radial-gradient(circle at 12% 20%, #DBEAFE 0, transparent 32%), radial-gradient(circle at 88% 70%, #FEF3C7 0, transparent 26%), var(--white); }
.hero::after { content: ""; position: absolute; inset: auto -80px -150px auto; width: 340px; height: 340px; border: 55px solid rgba(37,99,235,.06); border-radius: 50%; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(320px, .7fr); gap: 70px; align-items: center; }
.eyebrow { display: inline-block; color: var(--primary); font-size: 14px; font-weight: 800; letter-spacing: .12em; }
.hero h1 { margin: 15px 0 20px; color: var(--primary-dark); font-size: clamp(40px, 5vw, 68px); line-height: 1.12; letter-spacing: -.035em; }
.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: 750; 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: var(--white); background: var(--primary); box-shadow: 0 12px 28px rgba(37,99,235,.24); }
.button-secondary { color: var(--primary-dark); background: var(--white); border-color: var(--border); }
.button-ghost { color: var(--primary); background: #EFF6FF; border-color: #BFDBFE; }
.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: "✓"; margin-right: 7px; color: var(--primary); font-weight: 900; }
.hero-entry { padding: 30px; background: var(--white); border: 1px solid var(--border); border-radius: 26px; box-shadow: var(--shadow); }
.entry-icon { width: 58px; height: 58px; display: grid; place-items: center; margin-bottom: 18px; color: var(--primary); background: #EFF6FF; border-radius: 17px; }
.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: 800; }
.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: #64748B; }
.section { padding: 84px 0; }
.section-heading { max-width: 740px; margin: 0 auto 38px; 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: 1.25; }
.section-heading p, .notice p { margin: 0; color: var(--muted); }
.positioning { background: var(--background); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card { padding: 26px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); }
.feature-card span { width: 45px; height: 45px; display: grid; place-items: center; color: var(--white); background: var(--primary); border-radius: 13px; 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(--white); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.scenario-grid article { padding: 25px; background: linear-gradient(145deg, #EFF6FF, #FFFFFF); border: 1px solid #BFDBFE; border-radius: var(--radius); }
.scenario-grid strong { color: var(--primary-dark); font-size: 20px; }
.scenario-grid p { margin: 8px 0 0; color: var(--muted); }
.products { background: var(--background); }
.price-notice { margin: 0 0 26px; padding: 16px 20px; color: #7C4A03; background: #FFFBEB; border: 1px solid #FDE68A; border-radius: 14px; }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.product-card { min-width: 0; display: flex; flex-direction: column; padding: 14px; color: var(--text); background: var(--white); border: 1px solid var(--border); border-radius: 18px; text-decoration: none; box-shadow: 0 8px 22px rgba(30,58,95,.05); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.product-card:hover { transform: translateY(-4px); border-color: #93C5FD; box-shadow: 0 16px 32px rgba(30,58,95,.1); }
.product-image { aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; background: var(--white); border: 1px solid #F1F5F9; border-radius: 13px; }
.product-image img { width: 100%; height: 100%; object-fit: contain; }
.product-name { margin-top: 13px; color: var(--primary-dark); font-weight: 800; }
.product-price { margin-top: 4px; color: #B45309; font-size: 18px; font-weight: 900; }
.product-link { margin-top: 9px; color: var(--primary); font-size: 14px; font-weight: 700; }
.process { background: var(--white); }
.process-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin: 0; padding: 0; list-style: none; }
.process-list li { display: flex; gap: 16px; padding: 24px; 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: var(--white); background: var(--primary); border-radius: 50%; font-weight: 900; }
.process-list h3 { margin: 3px 0 6px; color: var(--primary-dark); }
.process-list p { margin: 0; color: var(--muted); }
.notice { background: #EFF6FF; }
.notice-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 65px; align-items: center; }
.notice ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.notice li { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 16px 18px; background: var(--white); border: 1px solid #BFDBFE; border-radius: 14px; }
.notice strong { color: var(--primary-dark); }
.notice li span { color: var(--muted); }
.faq { background: var(--white); }
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.faq-grid article { padding: 24px; background: var(--background); border: 1px solid var(--border); border-radius: 17px; }
.faq-grid h3 { margin: 0 0 8px; color: var(--primary-dark); font-size: 18px; }
.faq-grid p { margin: 0; color: var(--muted); }
.cta { color: var(--white); background: var(--primary-dark); }
.cta-inner { display: flex; justify-content: space-between; gap: 30px; align-items: center; }
.cta h2 { color: var(--white); }
.cta p { margin: 0; color: #DBEAFE; }
.eyebrow-light { color: #FCD34D; }
.button-light { flex: 0 0 auto; color: var(--primary-dark); background: var(--white); }
.site-footer { padding: 42px 0 22px; color: #CBD5E1; background: #0F172A; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr auto; gap: 34px; align-items: center; }
.footer-grid img { width: 280px; padding: 7px; background: var(--white); border-radius: 10px; }
.footer-grid p { margin: 9px 0 0; }
.footer-grid a { color: var(--white); font-weight: 800; text-underline-offset: 4px; }
.footer-bottom { margin-top: 30px; padding-top: 18px; border-top: 1px solid #334155; 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: 3px; }
  .business-nav a { white-space: nowrap; }
  .hero { padding-top: 54px; }
  .hero-grid { grid-template-columns: 1fr; gap: 35px; }
  .hero-entry { max-width: 600px; }
  .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: 260px; }
  .business-nav { gap: 5px; }
  .business-nav a { min-height: 44px; padding: 10px; font-size: 14px; }
  .hero { padding: 42px 0 48px; }
  .hero h1 { font-size: 40px; }
  .hero-lead { font-size: 17px; }
  .hero-actions { display: grid; }
  .hero-entry { padding: 24px; }
  .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; }
}