:root {
  --blue: #1756ac;
  --blue-dark: #124788;
  --ink: #20334d;
  --muted: #58697e;
  --line: #dce4ed;
  --paper: #f4f7fb;
  --orange: #a84c17;
  --white: #fff;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a, button { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
.container { width: min(1220px, calc(100% - 48px)); margin-inline: auto; }
.section { padding-block: 80px; }
.section h2 { margin: 0; font-size: clamp(28px, 3vw, 38px); line-height: 1.35; letter-spacing: -.03em; }
.section-kicker { margin: 0 0 10px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .12em; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 28px; }
.section-heading > div > p:last-child:not(.section-kicker) { margin: 13px 0 0; color: var(--muted); font-size: 15px; }
.button { min-height: 48px; display: inline-flex; justify-content: center; align-items: center; gap: 22px; padding: 10px 24px; border: 1px solid transparent; border-radius: 5px; font-size: 15px; font-weight: 700; transition: background-color .18s ease, border-color .18s ease; }
.button-primary { color: var(--white); background: var(--blue); }
.button-primary:hover { background: var(--blue-dark); }
.button-outline { color: var(--blue); background: var(--white); border-color: #b8c9df; }
.button-outline:hover { background: #edf4ff; border-color: var(--blue); }
.text-link { min-height: 44px; display: inline-flex; align-items: center; gap: 18px; color: var(--blue); font-size: 14px; font-weight: 700; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }

.utility-bar { color: var(--muted); background: #f5f7fa; border-bottom: 1px solid #e9edf2; font-size: 12px; }
.utility-inner { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.site-header { position: relative; z-index: 20; background: var(--white); border-bottom: 1px solid var(--line); }
.header-main { min-height: 90px; display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.brand { flex: 0 1 300px; display: block; width: 300px; }
.brand img { width: 100%; height: auto; }
.site-menu { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 700; }
.site-menu > a { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; }
.site-menu > a:hover { color: var(--blue); }
.site-menu .nav-action { gap: 25px; padding: 0 20px; color: var(--white); background: var(--blue); border-radius: 5px; }
.site-menu .nav-action:hover { color: var(--white); background: var(--blue-dark); }
.menu-toggle { display: none; width: 46px; height: 46px; padding: 11px; background: var(--white); border: 1px solid var(--line); border-radius: 5px; }
.menu-toggle span { display: block; height: 2px; margin: 4px 0; background: var(--blue); }

.hero { background: linear-gradient(105deg, #f9fbfe 0%, #f1f6fd 100%); border-bottom: 1px solid var(--line); }
.hero-layout { display: grid; grid-template-columns: minmax(0, 1.16fr) minmax(0, 1fr); align-items: center; gap: 75px; padding-block: 64px 70px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 22px; color: var(--blue); font-size: 13px; font-weight: 700; letter-spacing: .06em; }
.eyebrow > span { width: 6px; height: 15px; display: inline-block; background: var(--blue); }
.hero h1 { margin: 0; font-size: clamp(35px, 3.8vw, 51px); line-height: 1.35; letter-spacing: -.035em; }
.hero h1 > span { color: var(--blue); }
.hero-lead { max-width: 560px; margin: 23px 0 0; color: var(--muted); font-size: 16px; line-height: 1.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 29px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 12px 23px; margin: 23px 0 0; padding: 0; list-style: none; color: #536982; font-size: 12px; }
.hero-points li { display: flex; align-items: center; gap: 7px; }
.hero-points li::before { content: "✓"; color: var(--blue); font-weight: 800; }
.gift-sheet { position: relative; min-width: 0; border: 1px solid #cad9eb; border-top: 3px solid var(--blue); background: var(--white); box-shadow: 0 18px 35px rgba(31, 66, 113, .07); border-radius: 6px; }
.sheet-heading { min-height: 50px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 24px; border-bottom: 1px solid var(--line); color: #49617e; font-size: 13px; font-weight: 700; }
.sheet-label { padding: 2px 9px; color: var(--blue); background: #edf4ff; border-radius: 3px; font-size: 11px; }
.sheet-content { padding: 23px 24px 0; }
.sheet-content h2 { margin: 0; font-size: 23px; line-height: 1.4; }
.sheet-content > p { margin: 7px 0 19px; color: var(--muted); font-size: 13px; }
.sample-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.sample-item { min-width: 0; padding: 10px 8px; border: 1px solid #e4eaf2; border-radius: 4px; background: #fff; }
.sample-item img { width: 100%; height: 87px; object-fit: contain; }
.sample-item > span { display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 2; min-height: 36px; margin-top: 9px; font-size: 11px; line-height: 1.6; }
.sample-item strong { display: block; margin-top: 5px; color: var(--orange); font-size: 11px; }
.sheet-steps { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 21px 0; padding: 0; list-style: none; font-size: 12px; color: var(--blue); font-weight: 700; }
.sheet-steps li { display: flex; flex: 1; align-items: center; justify-content: space-between; gap: 8px; }
.sheet-steps li:last-child { flex: initial; }
.sheet-steps li:not(:last-child)::after { content: "→"; color: #8fa7c2; }
.sheet-note { display: flex; gap: 9px; align-items: center; margin: 0; padding: 11px 18px; color: var(--muted); background: #f7f9fc; border-top: 1px solid var(--line); border-radius: 0 0 5px 5px; font-size: 11px; }
.sheet-note > span { width: 16px; height: 16px; flex: 0 0 16px; display: grid; place-items: center; border: 1px solid #99abc2; border-radius: 50%; line-height: 1; }

.products-section { background: var(--white); }
.sort-label { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; color: var(--blue); background: #edf4ff; border: 1px solid #d7e5f8; border-radius: 4px; white-space: nowrap; font-size: 12px; font-weight: 700; }
.catalog-note { display: flex; align-items: center; gap: 9px; margin: 0 0 24px; padding: 12px 15px; color: var(--muted); background: var(--paper); border-radius: 4px; font-size: 12px; }
.catalog-note > span { width: 16px; height: 16px; display: grid; place-items: center; flex: 0 0 16px; color: var(--blue); border: 1px solid #8eabc9; border-radius: 50%; font-size: 11px; }
.product-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 16px; }
.product-card { display: flex; flex-direction: column; min-width: 0; border: 1px solid var(--line); border-radius: 6px; background: var(--white); transition: border-color .18s ease, box-shadow .18s ease; }
.product-card:hover { border-color: #8caed7; box-shadow: 0 6px 20px rgba(23, 86, 172, .09); }
.product-image { position: relative; flex: 0 0 auto; width: 100%; aspect-ratio: 1; overflow: hidden; border-bottom: 1px solid #eef1f5; border-radius: 5px 5px 0 0; }
.product-image img { position: absolute; inset: 0; width: 100%; height: 100%; padding: 13px; object-fit: contain; }
.product-info { display: flex; flex: 1; flex-direction: column; padding: 12px 12px 15px; }
.product-info h3 { min-height: 43px; margin: 0 0 13px; font-size: 13px; font-weight: 700; line-height: 1.65; overflow-wrap: anywhere; }
.product-bottom { display: flex; justify-content: space-between; align-items: end; gap: 6px; margin-top: auto; }
.price { margin: 0; }
.price > span { display: block; margin-bottom: 2px; color: var(--muted); font-size: 11px; }
.price strong { color: var(--orange); font-family: Arial, "Microsoft YaHei", sans-serif; font-size: 23px; font-weight: 700; line-height: 1.25; font-variant-numeric: tabular-nums; }
.product-arrow { display: grid; place-items: center; width: 25px; height: 25px; color: var(--blue); background: #f0f5fc; border-radius: 4px; font-size: 15px; }
.catalog-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.catalog-footer p { margin: 0; color: var(--muted); font-size: 13px; }

.scenarios-section { background: var(--paper); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.scenario-grid article { min-width: 0; padding: 24px; background: var(--white); border: 1px solid var(--line); border-radius: 6px; }
.scenario-symbol { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 22px; color: var(--blue); background: #edf4ff; border-radius: 5px; font-size: 18px; font-weight: 700; }
.scenario-grid h3 { margin: 0 0 9px; font-size: 19px; }
.scenario-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

.process-section { background: var(--white); }
.process-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0; padding: 0; list-style: none; border: 1px solid var(--line); border-radius: 6px; }
.process-grid li { position: relative; min-width: 0; padding: 28px 25px 30px; }
.process-grid li + li { border-left: 1px solid var(--line); }
.step-number { display: inline-block; margin-bottom: 20px; color: var(--blue); font-family: Arial, sans-serif; font-size: 29px; font-weight: 700; line-height: 1; }
.process-grid h3 { margin: 0 0 10px; font-size: 18px; }
.process-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

.selection-section { background: #edf4fd; }
.selection-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.3fr); gap: 80px; align-items: center; }
.selection-intro > p:not(.section-kicker) { max-width: 350px; margin: 19px 0 18px; color: var(--muted); font-size: 14px; }
.checklist { margin: 0; padding: 8px 28px; border: 1px solid #d5e2f2; border-radius: 6px; background: var(--white); }
.checklist > div { display: grid; grid-template-columns: 130px 1fr; gap: 15px; padding: 21px 0; }
.checklist > div + div { border-top: 1px solid #e5ebf3; }
.checklist dt { display: flex; align-items: start; gap: 10px; font-size: 14px; font-weight: 700; }
.checklist dt span { color: var(--blue); }
.checklist dd { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

.faq-section { background: var(--white); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.3fr); gap: 80px; }
.faq-intro > p:not(.section-kicker) { margin: 17px 0 27px; color: var(--muted); font-size: 14px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { position: relative; display: flex; align-items: center; min-height: 68px; padding: 18px 32px 18px 0; list-style: none; font-size: 15px; font-weight: 700; cursor: pointer; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { position: absolute; right: 2px; content: "+"; color: var(--blue); font-size: 24px; font-weight: 400; }
.faq-item[open] summary::after { content: "−"; }
.faq-item > p { margin: 0; padding: 0 28px 22px 0; color: var(--muted); font-size: 14px; line-height: 1.85; }

.site-footer { background: #f5f7fa; border-top: 1px solid var(--line); }
.footer-layout { display: grid; grid-template-columns: 1.5fr .65fr 1fr; gap: 75px; padding-block: 45px 35px; }
.footer-brand img { width: min(285px, 100%); height: auto; }
.footer-brand p { max-width: 360px; margin: 13px 0 0; color: var(--muted); font-size: 13px; }
.footer-layout h2 { margin: 0 0 13px; font-size: 14px; }
.footer-links a { min-height: 44px; display: flex; align-items: center; gap: 14px; color: var(--muted); font-size: 13px; }
.footer-links a:hover { color: var(--blue); }
.footer-info p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 12px; padding-block: 17px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.back-to-top { position: fixed; right: 20px; bottom: 20px; z-index: 25; width: 46px; height: 46px; color: var(--blue); background: var(--white); border: 1px solid #b8cbe2; border-radius: 5px; box-shadow: 0 4px 15px rgba(32,51,77,.1); font-size: 22px; }
.back-to-top[hidden] { display: none; }

@media (max-width: 1100px) {
  .hero-layout { gap: 35px; }
  .site-menu { gap: 21px; }
  .product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .selection-layout, .faq-layout { gap: 45px; }
  .footer-layout { gap: 35px; }
}
@media (max-width: 900px) {
  .hero-layout { gap: 28px; padding-block: 50px; }
  .hero h1 { font-size: 35px; }
  .hero-lead { font-size: 14px; }
  .sheet-content, .sheet-heading { padding-inline: 17px; }
  .sample-item img { height: 66px; }
  .sample-item { padding-inline: 5px; }
  .scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-grid li:nth-child(3) { border-left: 0; }
  .process-grid li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .selection-layout, .faq-layout { grid-template-columns: 1fr; gap: 28px; }
  .selection-intro > p:not(.section-kicker) { max-width: none; }
  .selection-intro h2 br { display: none; }
}
@media (max-width: 760px) {
  .header-main { min-height: 78px; gap: 15px; }
  .brand { flex: 0 1 275px; width: min(275px, calc(100% - 61px)); }
  .menu-toggle { display: block; flex: 0 0 46px; }
  .site-menu { position: absolute; display: none; top: 100%; left: 24px; right: 24px; align-items: stretch; flex-direction: column; gap: 0; padding: 12px; border: 1px solid var(--line); border-radius: 5px; background: var(--white); box-shadow: 0 12px 24px rgba(32,51,77,.12); }
  .site-menu.is-open { display: flex; }
  .site-menu > a { min-height: 48px; }
  .hero-layout { grid-template-columns: 1fr; gap: 35px; }
  .hero-copy { max-width: 600px; }
  .hero h1 { font-size: clamp(33px, 6vw, 43px); }
  .hero-lead { font-size: 15px; }
  .gift-sheet { width: 100%; max-width: 540px; }
  .sample-item img { height: 92px; }
  .sample-item > span { min-height: 35px; font-size: 12px; }
  .sheet-content, .sheet-heading { padding-inline: 23px; }
  .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-layout { grid-template-columns: 1.3fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 540px) {
  .container { width: calc(100% - 30px); }
  .utility-inner { justify-content: center; min-height: 31px; font-size: 11px; }
  .utility-inner > span:last-child { display: none; }
  .brand { flex-basis: 254px; }
  .header-main { min-height: 74px; }
  .hero-layout { padding-block: 39px 44px; gap: 30px; }
  .eyebrow { margin-bottom: 17px; font-size: 12px; }
  .hero h1 { font-size: clamp(29px, 8.5vw, 39px); }
  .hero-lead { margin-top: 17px; font-size: 14px; }
  .hero-actions { display: grid; grid-template-columns: 1.2fr 1fr; margin-top: 24px; gap: 10px; }
  .hero-actions .button { padding-inline: 12px; gap: 12px; font-size: 14px; }
  .hero-points { gap: 9px 14px; font-size: 11px; }
  .sheet-heading { padding-inline: 17px; }
  .sheet-content { padding: 18px 17px 0; }
  .sheet-content h2 { font-size: 21px; }
  .sample-grid { gap: 8px; }
  .sample-item { padding: 8px 5px; }
  .sample-item img { height: 77px; }
  .sample-item > span { min-height: 36px; font-size: 11px; }
  .sample-item strong { font-size: 11px; }
  .sheet-note { padding: 10px 13px; font-size: 11px; }
  .section { padding-block: 55px; }
  .section h2 { font-size: 27px; }
  .section-heading { align-items: start; flex-direction: column; gap: 16px; margin-bottom: 20px; }
  .section-heading > div > p:last-child:not(.section-kicker) { font-size: 14px; }
  .sort-label { padding: 6px 10px; font-size: 11px; }
  .catalog-note { align-items: start; padding: 11px 12px; font-size: 11px; line-height: 1.8; }
  .catalog-note > span { margin-top: 2px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .product-image img { padding: 11px; }
  .product-info { padding: 11px 12px 14px; }
  .product-info h3 { min-height: 46px; margin-bottom: 13px; font-size: 13px; }
  .price strong { font-size: 22px; }
  .catalog-footer { align-items: stretch; flex-direction: column; gap: 14px; margin-top: 22px; padding-top: 20px; }
  .catalog-footer p { font-size: 12px; }
  .scenario-grid { gap: 12px; }
  .scenario-grid article { padding: 18px 16px; }
  .scenario-symbol { width: 32px; height: 32px; margin-bottom: 17px; font-size: 16px; }
  .scenario-grid h3 { font-size: 17px; }
  .scenario-grid p { font-size: 12px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-grid li { padding: 22px; }
  .process-grid li + li { border-left: 0; border-top: 1px solid var(--line); }
  .step-number { margin-bottom: 13px; font-size: 25px; }
  .process-grid h3 { font-size: 17px; }
  .checklist { padding-inline: 18px; }
  .checklist > div { grid-template-columns: 1fr; gap: 7px; padding-block: 18px; }
  .checklist dt { font-size: 14px; }
  .checklist dd { padding-left: 24px; font-size: 12px; }
  .faq-item summary { min-height: 67px; font-size: 14px; }
  .faq-item > p { font-size: 13px; }
  .footer-layout { gap: 27px 20px; padding-block: 34px 28px; }
  .footer-brand img { width: 265px; }
  .footer-bottom { flex-direction: column; gap: 3px; font-size: 11px; }
  .back-to-top { right: 15px; bottom: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}