:root {
  --blue: #2563eb;
  --blue-dark: #1e3a5f;
  --orange: #f59e0b;
  --focus: #b45309;
  --ink: #1f2937;
  --muted: #536174;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --line: #e2e8f0;
  --shadow: 0 18px 50px rgba(30, 58, 95, 0.10);
  --radius: 20px;
  --container: 1180px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px 18px; border-radius: 10px; color: #fff; background: var(--blue-dark); }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(226, 232, 240, .9); background: rgba(255, 255, 255, .96); backdrop-filter: blur(14px); }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--blue-dark); text-decoration: none; }
.brand img { width: 52px; height: 52px; object-fit: contain; }
.brand-copy { display: grid; line-height: 1.2; }
.brand-copy strong { font-size: 19px; letter-spacing: .02em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 12px; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; padding: 0 13px; border-radius: 10px; color: #334155; font-size: 15px; font-weight: 700; text-decoration: none; }
.site-nav a:hover { color: var(--blue); background: #eff6ff; }
.menu-toggle { display: none; min-width: 72px; min-height: 44px; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); border-radius: 10px; color: var(--blue-dark); background: #fff; font: inherit; font-weight: 700; }
.menu-icon, .menu-icon::before, .menu-icon::after { width: 18px; height: 2px; display: block; background: currentColor; content: ""; }
.menu-icon { position: relative; }
.menu-icon::before { position: absolute; top: -6px; }
.menu-icon::after { position: absolute; top: 6px; }

.hero { padding: 88px 0 80px; background: #f3f7ff; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .8fr); align-items: center; gap: 72px; }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-size: 14px; font-weight: 800; letter-spacing: .12em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { max-width: 720px; margin: 0; color: var(--blue-dark); font-size: clamp(38px, 5vw, 62px); line-height: 1.16; letter-spacing: -.035em; }
.hero-lead { max-width: 680px; margin: 24px 0 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; border: 1px solid transparent; border-radius: 12px; font-weight: 800; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(37, 99, 235, .22); }
.button-primary:hover { background: #1d4ed8; }
.button-secondary { color: var(--blue-dark); border-color: #bfd1ea; background: #fff; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 26px 0 0; padding: 0; color: #43536a; list-style: none; font-weight: 700; }
.hero-points li::before { margin-right: 7px; color: var(--orange); content: "●"; font-size: 9px; vertical-align: 2px; }
.hero-visual { min-height: 410px; position: relative; border: 1px solid #dbe7f6; border-radius: 32px; background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.parcel-shape { width: 190px; height: 150px; position: absolute; left: 50%; top: 50%; border-radius: 22px; background: var(--blue-dark); transform: translate(-50%, -44%); }
.parcel-shape::before { width: 100%; height: 26px; position: absolute; left: 0; top: 34px; background: var(--blue); content: ""; }
.parcel-shape::after { width: 26px; height: 100%; position: absolute; left: calc(50% - 13px); top: 0; background: var(--blue); content: ""; }
.parcel-shape span::before, .parcel-shape span::after { width: 58px; height: 38px; position: absolute; top: -34px; border: 12px solid var(--blue); content: ""; }
.parcel-shape span::before { left: 32px; border-radius: 36px 8px 0 36px; }
.parcel-shape span::after { right: 32px; border-radius: 8px 36px 36px 0; }
.route-line { width: 72%; height: 150px; position: absolute; left: 14%; top: 38%; border: 4px solid #c8d8ef; border-top-color: transparent; border-radius: 50%; transform: rotate(-9deg); }
.route-card { position: absolute; z-index: 2; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; color: var(--blue-dark); background: #fff; box-shadow: 0 10px 24px rgba(30, 58, 95, .12); font-size: 14px; font-weight: 800; }
.route-card::before { width: 9px; height: 9px; display: inline-block; margin-right: 8px; border-radius: 50%; background: var(--orange); content: ""; }
.route-card-a { left: 9%; top: 16%; }
.route-card-b { right: 8%; bottom: 14%; }

.section { padding: 92px 0; scroll-margin-top: 88px; }
.section-tint { background: var(--surface-soft); }
.section-heading { max-width: 760px; margin: 0 auto 44px; text-align: center; }
.section-heading h2, .guide-grid h2, .faq-layout h2, .compliance-box h2 { margin: 0; color: var(--blue-dark); font-size: clamp(30px, 4vw, 44px); line-height: 1.25; letter-spacing: -.02em; }
.section-heading > p:last-child, .guide-lead, .faq-layout > div > p:last-child { margin: 16px 0 0; color: var(--muted); }
.product-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 16px; }
.product-card { min-width: 0; padding: 10px 10px 15px; border: 1px solid var(--line); border-radius: 16px; color: inherit; background: #fff; box-shadow: 0 8px 28px rgba(30, 58, 95, .06); text-decoration: none; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.product-card:hover { transform: translateY(-4px); border-color: #b8ccec; box-shadow: 0 14px 32px rgba(30, 58, 95, .12); }
.product-image { display: grid; place-items: center; aspect-ratio: 1; overflow: hidden; border-radius: 11px; background: #f6f8fb; }
.product-image img { width: 100%; height: 100%; object-fit: contain; }
.product-card h3 { margin: 13px 4px 5px; color: var(--blue-dark); font-size: 16px; line-height: 1.35; }
.product-card p { min-height: 38px; margin: 0 4px 10px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.product-price { display: flex; align-items: baseline; gap: 5px; margin: 0 4px; color: var(--muted); font-size: 12px; }
.product-price strong { color: #b45309; font-size: 17px; }
.product-more-card { grid-column: span 2; min-height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 24px; border: 1px dashed #9bb5db; border-radius: 16px; color: var(--blue-dark); background: linear-gradient(145deg, #f7faff, #edf4ff); text-align: center; text-decoration: none; }
.product-more-card:hover { border-color: var(--blue); box-shadow: 0 12px 30px rgba(30, 84, 149, .11); }
.product-more-card > strong { font-size: 21px; }
.product-more-card > span:last-child { color: var(--muted); font-size: 13px; }
.product-more-mark { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-size: 28px; line-height: 1; }
.section-action { margin-top: 32px; text-align: center; }
.text-link { min-height: 44px; display: inline-flex; align-items: center; color: var(--blue); font-weight: 800; text-underline-offset: 4px; }
.text-link::after { margin-left: 8px; content: "→"; }

.scenario-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
.scenario-grid article { min-width: 0; padding: 26px 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.number-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: var(--blue); font-weight: 900; }
.scenario-grid h3 { margin: 18px 0 8px; color: var(--blue-dark); font-size: 19px; }
.scenario-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.process-list { max-width: 980px; display: grid; margin: 0 auto; padding: 0; list-style: none; }
.process-list li { display: grid; grid-template-columns: 86px 1fr; gap: 24px; position: relative; padding: 0 0 34px; }
.process-list li:not(:last-child)::after { width: 2px; position: absolute; left: 42px; top: 58px; bottom: 4px; background: #d8e4f5; content: ""; }
.process-list li > span { width: 86px; height: 52px; display: grid; place-items: center; z-index: 1; border-radius: 16px; color: #fff; background: var(--blue); font-size: 14px; font-weight: 900; }
.process-list h3 { margin: 0 0 5px; color: var(--blue-dark); font-size: 21px; }
.process-list p { margin: 0; color: var(--muted); }

.section-dark { color: #fff; background: var(--blue-dark); }
.section-heading-light h2 { color: #fff; }
.section-heading-light .eyebrow { color: #fdba48; }
.section-heading-light > p:last-child { color: #d6e0ed; }
.advantage-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.advantage-grid article { min-width: 0; padding: 26px; border: 1px solid rgba(255, 255, 255, .14); border-radius: 18px; background: rgba(255, 255, 255, .06); }
.advantage-grid span { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: var(--blue-dark); background: var(--orange); font-weight: 900; }
.advantage-grid h3 { margin: 16px 0 8px; font-size: 20px; }
.advantage-grid p { margin: 0; color: #d6e0ed; }

.guide-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: 70px; }
.guide-lead { margin-bottom: 22px; }
.check-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.check-list article { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 8px 24px rgba(30, 58, 95, .05); }
.check-list h3 { margin: 0 0 8px; color: var(--blue-dark); font-size: 19px; }
.check-list h3::before { margin-right: 8px; color: var(--orange); content: "✓"; }
.check-list p { margin: 0; color: var(--muted); font-size: 14px; }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.knowledge-grid article { padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.knowledge-grid span { color: var(--blue); font-size: 13px; font-weight: 900; letter-spacing: .14em; }
.knowledge-grid h3 { margin: 10px 0; color: var(--blue-dark); font-size: 21px; }
.knowledge-grid p { margin: 0; color: var(--muted); }
.compliance-box { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 28px; padding: 38px; border: 1px solid #cfe0f5; border-radius: 24px; background: #f3f7ff; }
.compliance-mark { width: 66px; height: 66px; display: grid; place-items: center; border-radius: 20px; color: #fff; background: var(--blue); font-size: 28px; font-weight: 900; }
.compliance-box p:last-child { margin: 14px 0 0; color: var(--muted); }

.faq-layout { display: grid; grid-template-columns: .65fr 1.35fr; align-items: start; gap: 70px; }
.faq-list { display: grid; gap: 12px; }
.faq-list details { border: 1px solid var(--line); border-radius: 14px; background: #fff; overflow: hidden; }
.faq-list summary { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 18px; color: var(--blue-dark); cursor: pointer; font-weight: 800; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { color: var(--blue); content: "+"; font-size: 24px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0; padding: 0 18px 18px; color: var(--muted); }
.final-cta { padding: 58px 0; color: #fff; background: var(--blue); }
.final-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.final-cta .eyebrow { color: #ffdda0; }
.final-cta h2 { margin: 0; font-size: clamp(26px, 3.5vw, 38px); }
.button-light { color: var(--blue); background: #fff; white-space: nowrap; }
.site-footer { padding: 46px 0; color: #c9d5e5; background: #122945; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; align-items: start; gap: 24px 50px; }
.footer-brand strong { color: #fff; font-size: 20px; }
.footer-brand p, .footer-note { margin: 7px 0 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.site-footer nav a { min-height: 44px; display: inline-flex; align-items: center; color: #fff; text-underline-offset: 4px; }
.footer-note { grid-column: 1 / -1; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .12); font-size: 13px; }
.back-to-top { width: 48px; height: 48px; position: fixed; right: 22px; bottom: 22px; z-index: 30; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); box-shadow: 0 10px 24px rgba(30, 58, 95, .24); font-size: 22px; font-weight: 900; text-decoration: none; }
.back-to-top:not([hidden]) { display: grid; }

@media (max-width: 1180px) {
  .product-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr 360px; gap: 36px; }
  .scenario-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .advantage-grid, .knowledge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-grid, .faq-layout { gap: 40px; }
}

@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; min-height: 72px; padding-block: 9px; }
  .js .menu-toggle { display: inline-flex; }
  .site-nav { width: 100%; order: 3; padding: 8px 0 4px; border-top: 1px solid var(--line); }
  .site-nav a { flex: 1 1 auto; justify-content: center; }
  .hero { padding: 66px 0; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 350px; }
  .guide-grid, .faq-layout { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .brand-copy small { display: none; }
  .brand img { width: 46px; height: 46px; }
  .brand-copy strong { font-size: 17px; }
  .site-nav { align-items: stretch; flex-direction: column; }
  .site-nav a { justify-content: flex-start; }
  .hero { padding: 52px 0; }
  h1 { font-size: clamp(34px, 10vw, 46px); }
  .hero-lead { font-size: 16px; }
  .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .button { padding-inline: 14px; }
  .hero-visual { min-height: 300px; border-radius: 22px; }
  .parcel-shape { width: 150px; height: 118px; }
  .route-card { padding: 9px 11px; font-size: 12px; }
  .section { padding: 68px 0; }
  .section-heading { margin-bottom: 32px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .product-card { padding: 8px 8px 12px; border-radius: 13px; }
  .product-card h3 { margin: 10px 3px 4px; font-size: 15px; }
  .product-card p { min-height: 36px; margin: 0 3px 8px; font-size: 11px; }
  .product-price { margin: 0 3px; font-size: 11px; }
  .product-price strong { font-size: 16px; }
  .product-more-card { grid-column: span 2; min-height: 190px; padding: 18px; border-radius: 13px; }
  .scenario-grid, .advantage-grid, .knowledge-grid, .check-list { grid-template-columns: 1fr; }
  .process-list li { grid-template-columns: 68px 1fr; gap: 16px; }
  .process-list li > span { width: 68px; height: 48px; }
  .process-list li:not(:last-child)::after { left: 33px; }
  .compliance-box { grid-template-columns: 1fr; padding: 28px; }
  .final-cta-inner { align-items: stretch; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-note { grid-column: auto; }
}

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