:root {
  color-scheme: light;
  --paper: #faf9f6;
  --ink: #2d3435;
  --muted: #676c6b;
  --accent: #48626e;
  --brown: #966b44;
  --line: #deddd7;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.8 var(--sans); -webkit-font-smoothing: antialiased; }
body:has(dialog[open]) { overflow: hidden; }
::selection { background: #d5e0de; color: var(--ink); }
button, input { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
figure, p, h1, h2, h3 { margin: 0; }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; }
h2 { font-size: clamp(34px, 3.4vw, 48px); line-height: 1.36; letter-spacing: -.045em; }
p { color: var(--muted); }
a, button, summary { touch-action: manipulation; }
:focus-visible { outline: 2px solid var(--brown); outline-offset: 6px; }
section[id], .document-section[id] { scroll-margin-top: 104px; }
.container { width: min(1360px, calc(100% - 128px)); margin-inline: auto; }
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 22px; height: 22px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.skip-link { position: fixed; top: 10px; left: 12px; z-index: 100; padding: 10px 20px; background: white; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 20; background: var(--paper); }
.header-inner { height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand img { width: 40px; height: 34px; object-fit: contain; }
.brand span { font: 700 28px/1.3 var(--serif); letter-spacing: .025em; }
.desktop-nav { display: flex; align-items: center; gap: 32px; }
.desktop-nav a { font-size: 15px; padding-block: 10px; position: relative; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.desktop-nav a:hover::after { transform: scaleX(1); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 52px; padding: 12px 28px; border-radius: 100px; border: 1px solid transparent; font: 500 15px/1.5 var(--sans); letter-spacing: .015em; transition: background .2s, color .2s, transform .2s; }
.button:hover { transform: translateY(-2px); }
.button--primary { background: var(--accent); color: #fff; }
.button--primary:hover { background: #354d58; }
.button--outline { border-color: var(--ink); background: transparent; color: var(--ink); }
.button--outline:hover { background: var(--ink); color: var(--paper); }
.header-cta { min-height: 42px; padding: 9px 24px; font-size: 14px; }
.mobile-nav { display: none; }
.text-link { display: inline-flex; align-items: center; gap: 8px; padding-bottom: 3px; border-bottom: 1px solid currentColor; font: 500 14px/1.7 var(--sans); color: var(--accent); transition: color .2s; }
.text-link:hover { color: var(--brown); }
.text-link .icon { width: 17px; height: 17px; }
.hero { display: grid; grid-template-columns: .82fr 1.4fr; gap: 44px; align-items: center; padding-top: 24px; padding-bottom: 58px; }
.hero-copy { padding-bottom: 26px; }
.hero h1 { font-size: clamp(43px, 4.6vw, 70px); letter-spacing: -.045em; line-height: 1.38; white-space: nowrap; }
.hero h1 em { font-style: normal; color: var(--brown); }
.hero-copy > p { margin-top: 26px; font-size: 17px; line-height: 1.95; color: #555d5e; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 34px; margin-top: 36px; }
.hero-actions .button { padding: 17px 30px; min-height: 60px; font-size: 16px; }
.hero-actions .text-link { color: var(--ink); }
.hero-image { width: 100%; height: 640px; object-fit: cover; object-position: center; border-radius: 4px; }
.hero-figure figcaption { display: flex; justify-content: space-between; gap: 12px; margin-top: 11px; color: var(--muted); font-size: 12px; }
.about { display: grid; grid-template-columns: .35fr 1.3fr 1.1fr; gap: 34px; border-top: 1px solid var(--line); padding-top: 46px; padding-bottom: 48px; align-items: start; }
.section-label { font-size: 14px; color: var(--ink); padding-top: 8px; }
.about h2 { font-size: clamp(25px, 2.5vw, 35px); line-height: 1.5; letter-spacing: -.035em; }
.about-description { font-size: 14px; line-height: 1.9; border-left: 1px solid var(--line); padding-left: 36px; }
.section-space { padding-block: 84px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 48px; margin-bottom: 44px; }
.section-heading p { font-size: 16px; line-height: 1.85; max-width: 470px; }
.product-grid { display: grid; grid-template-columns: 1.45fr 1fr 1fr; gap: 22px; }
.product-item { min-width: 0; }
.product-image-link { display: block; overflow: hidden; border-radius: 4px; background: #eae5dd; }
.product-image-link img { width: 100%; height: 328px; object-fit: cover; transition: transform .6s cubic-bezier(.2,.7,.3,1); }
.product-image-link:hover img { transform: scale(1.035); }
.product-number { display: block; margin-top: 18px; font-size: 13px; color: #82867f; font-variant-numeric: tabular-nums; }
.product-item h3 { font-size: 26px; line-height: 1.6; letter-spacing: -.04em; margin-top: 3px; }
.product-item > p { font-size: 14px; margin: 4px 0 18px; }
.image-note { font-size: 11px; margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); }
.service-section { border-top: 1px solid var(--line); background: #f5f4f0; }
.service-layout { display: grid; grid-template-columns: .85fr 1.35fr 1.13fr; gap: 40px; align-items: start; }
.service-heading h2 { font-size: clamp(31px, 3.2vw, 44px); }
.service-heading p { margin-top: 20px; font-size: 15px; }
.service-heading .text-link { margin-top: 28px; }
.faq-list details { border-top: 1px solid #cfcec8; }
.faq-list details:last-child { border-bottom: 1px solid #cfcec8; }
.faq-list summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 20px 0; font: 600 18px/1.7 var(--serif); }
.faq-list summary::-webkit-details-marker, .mobile-nav summary::-webkit-details-marker { display: none; }
.faq-indicator { position: relative; width: 14px; height: 14px; flex-shrink: 0; }
.faq-indicator::before, .faq-indicator::after { content: ""; position: absolute; background: currentColor; width: 12px; height: 1px; left: 1px; top: 6px; }
.faq-indicator::after { transform: rotate(90deg); transition: transform .2s; }
details[open] > summary .faq-indicator::after { transform: rotate(0deg); }
.faq-list details p { font-size: 13px; line-height: 1.95; padding: 0 20px 22px 0; }
.service-photo { height: 330px; overflow: hidden; border-radius: 4px; }
.service-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 68% center; }
.mini-section { background: var(--accent); color: #fff; padding-block: 54px; }
.mini-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: center; }
.mini-copy h2 { font-size: clamp(31px, 3.1vw, 43px); line-height: 1.45; }
.mini-copy p { color: #e5edef; font-size: 14px; line-height: 1.95; margin-top: 24px; }
.mini-feature { display: grid; grid-template-columns: 1fr 1fr; border-radius: 4px; overflow: hidden; }
.mini-scene { width: 100%; height: 100%; min-height: 350px; object-fit: cover; object-position: 56% center; }
.mini-panel { background: var(--paper); color: var(--ink); padding: 28px 30px; }
.mini-platform { font-size: 11px; }
.mini-panel h3 { font-size: 32px; line-height: 1.6; margin-top: 3px; }
.mini-steps { margin: 20px 0 24px; padding: 0; list-style: none; }
.mini-steps li { border-bottom: 1px solid var(--line); padding: 9px 0; font-size: 14px; }
.mini-steps span { display: inline-block; font-size: 12px; width: 36px; color: var(--muted); }
.mini-panel .button { width: 100%; min-height: 44px; padding: 10px 16px; font-size: 13px; gap: 12px; white-space: nowrap; }
.site-footer { padding: 44px 0 22px; }
.footer-main { display: grid; grid-template-columns: 1fr 1.1fr 1.2fr; gap: 44px; padding-bottom: 36px; }
.footer-brand > p { margin-top: 7px; padding-left: 54px; font-size: 11px; letter-spacing: .2em; }
.footer-contact, .footer-links { border-left: 1px solid var(--line); padding-left: 40px; min-width: 0; }
.site-footer h2 { font: 500 14px/1.8 var(--sans); letter-spacing: 0; margin-bottom: 9px; }
.footer-contact p, .footer-contact > a, .footer-links a { font-size: 12px; color: var(--muted); overflow-wrap: anywhere; }
.footer-contact > a { display: block; }
.footer-contact > .footer-service-link { display: inline-flex; align-items: center; gap: 5px; }
.footer-service-link .icon { width: 14px; height: 14px; }
.footer-links nav { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.site-footer a:hover { color: var(--brown); }
.footer-bottom { display: flex; justify-content: space-between; gap: 10px 24px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 18px; font-size: 10px; color: var(--muted); }
.guide-dialog { width: min(570px, calc(100% - 40px)); max-height: calc(100dvh - 48px); border: 1px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink); padding: 42px; overflow-y: auto; box-shadow: 0 24px 100px #182e3433; }
.guide-dialog::backdrop { background: #14252f77; backdrop-filter: blur(4px); }
.guide-dialog[open] { animation: dialog-enter .2s ease-out; }
.dialog-close { position: absolute; top: 12px; right: 12px; display: grid; place-items: center; width: 40px; height: 40px; border: 0; background: transparent; color: var(--ink); border-radius: 50%; }
.dialog-close:hover { background: #e9e8e2; }
.dialog-label { font-size: 12px; margin-bottom: 12px; color: var(--brown); }
.guide-dialog h2 { font-size: 34px; line-height: 1.5; }
.guide-dialog > p:not(.dialog-label) { margin-top: 20px; font-size: 14px; }
.guide-list { list-style: decimal-leading-zero; padding-left: 26px; margin: 26px 0; }
.guide-list li { padding-left: 8px; margin-bottom: 18px; }
.guide-list li::marker { color: var(--brown); font-size: 12px; }
.guide-list h3 { font: 600 15px/1.8 var(--sans); margin-bottom: 4px; }
.guide-list p { font-size: 13px; }
.dialog-brand { width: 64px; height: 53px; object-fit: contain; margin-bottom: 20px; }
.mini-dialog .mini-status { font-size: 12px; padding: 14px 0; border-block: 1px solid var(--line); }
.mini-dialog .button { margin-top: 18px; }
.mini-qr { margin: 24px auto 8px; }
.mini-dialog .copy-result { min-height: 24px; font-size: 12px; color: var(--accent); margin-top: 12px; }
.document { padding-block: 50px 90px; min-height: 65vh; }
.document-inner { width: min(800px, 100%); margin-inline: auto; }
.breadcrumbs { font-size: 12px; color: var(--muted); margin-bottom: 30px; }
.breadcrumbs a { border-bottom: 1px solid var(--line); }
.document h1 { font-size: clamp(36px, 4vw, 52px); line-height: 1.4; letter-spacing: -.035em; }
.document-lead { font-size: 16px; margin: 18px 0 32px; }
.document-toc { display: flex; flex-wrap: wrap; gap: 12px 24px; border-block: 1px solid var(--line); padding-block: 20px; margin-bottom: 36px; }
.document-toc a { font-size: 13px; color: var(--accent); }
.document-section { margin-block: 32px; }
.document-section h2 { font-size: 24px; letter-spacing: -.02em; margin-bottom: 12px; }
.document-section h3 { font: 600 16px/1.8 var(--sans); margin: 18px 0 8px; }
.document-section p, .document-section li { font-size: 14px; color: var(--muted); }
.document-section p + p { margin-top: 12px; }
.document-section ul { padding-left: 22px; }
.document-section a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.document-note { padding-top: 22px; border-top: 1px solid var(--line); font-size: 12px; }
@keyframes dialog-enter { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@media (min-width: 1600px) { .hero-image { height: 640px; } }
@media (max-width: 1150px) {
  .container { width: calc(100% - 72px); }
  .desktop-nav { gap: 22px; }
  .desktop-nav a { font-size: 12px; }
  .brand span { font-size: 23px; }
  .header-inner { gap: 20px; }
  .hero { gap: 30px; grid-template-columns: .94fr 1.1fr; }
  .hero-image { height: 490px; }
  .hero h1 { font-size: 4.35vw; }
  .hero-copy > p { font-size: 14px; }
  .hero-actions { gap: 22px; }
  .hero-actions .button { padding: 14px 23px; font-size: 13px; min-height: 52px; }
  .about { grid-template-columns: .3fr 1.2fr 1.1fr; gap: 22px; }
  .about-description { padding-left: 26px; font-size: 13px; }
  .product-image-link img { height: 280px; }
  .product-item h3 { font-size: 22px; }
  .product-item > p { font-size: 12px; }
  .service-layout { grid-template-columns: .9fr 1.5fr; gap: 42px; }
  .service-photo { display: none; }
  .mini-layout { grid-template-columns: .9fr 1.25fr; gap: 28px; }
  .mini-feature { grid-template-columns: .75fr 1fr; }
  .mini-panel { padding: 24px; }
  .mini-copy h2 { font-size: 33px; }
  .footer-main { gap: 28px; }
  .footer-contact, .footer-links { padding-left: 26px; }
}
@media (max-width: 860px) {
  .container { width: calc(100% - 48px); }
  .desktop-nav, .header-cta { display: none; }
  .header-inner { height: 72px; }
  .mobile-nav { display: block; }
  .mobile-nav summary { list-style: none; display: grid; place-items: center; width: 44px; height: 44px; cursor: pointer; }
  .mobile-nav summary svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.5; }
  .mobile-nav nav { position: absolute; top: 72px; left: 0; right: 0; background: var(--paper); padding: 16px 24px 22px; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px #2d34350a; }
  .mobile-nav nav a { display: block; padding: 12px 4px; font-size: 15px; }
  .hero { grid-template-columns: 1fr 1fr; gap: 24px; padding-top: 24px; padding-bottom: 40px; }
  .hero-image { height: 370px; }
  .hero h1 { font-size: 4.6vw; }
  .hero-copy { padding: 0; }
  .hero-copy > p { font-size: 12px; margin-top: 20px; }
  .hero-actions { margin-top: 24px; gap: 20px; }
  .hero-actions .button { padding: 13px 18px; font-size: 12px; gap: 8px; min-height: 48px; }
  .hero-actions .text-link { font-size: 12px; }
  .hero-figure figcaption { font-size: 9px; flex-wrap: wrap; gap: 0 8px; }
  .about { grid-template-columns: .75fr 1.4fr; gap: 16px 32px; padding-block: 36px; }
  .section-label { grid-column: 1 / -1; padding: 0; }
  .about h2 { font-size: 25px; }
  .about-description { font-size: 12px; }
  .section-space { padding-block: 60px; }
  .section-heading p { font-size: 13px; max-width: 300px; }
  .product-grid { gap: 16px; grid-template-columns: repeat(3, 1fr); }
  .product-image-link img { height: 230px; }
  .product-item h3 { font-size: 20px; }
  .product-item > p { min-height: 44px; margin-top: 8px; }
  .product-item .text-link { font-size: 12px; }
  .mini-layout { grid-template-columns: 1fr; gap: 32px; }
  .mini-copy p { margin-top: 16px; }
  .mini-feature { grid-template-columns: 1fr 1fr; }
  .mini-panel { padding: 32px; }
  .mini-scene { min-height: 330px; }
  .mini-panel .button { max-width: 230px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact, .footer-links { padding: 0; border: 0; }
}
@media (max-width: 600px) {
  section[id], .document-section[id] { scroll-margin-top: 84px; }
  .container { width: calc(100% - 40px); }
  .brand span { font-size: 23px; }
  .brand img { width: 34px; height: 28px; }
  .brand { gap: 9px; }
  .hero { grid-template-columns: 1fr; gap: 34px; padding-top: 28px; padding-bottom: 34px; }
  .hero h1 { font-size: clamp(39px, 10.5vw, 58px); line-height: 1.3; letter-spacing: -.035em; }
  .hero-copy > p { font-size: 13px; line-height: 1.9; margin-top: 24px; }
  .hero-actions { margin-top: 27px; gap: 28px; }
  .hero-actions .button { font-size: 13px; padding: 13px 23px; gap: 12px; min-height: 50px; }
  .hero-actions .text-link { font-size: 13px; }
  .hero-image { height: auto; aspect-ratio: 1.2; }
  .hero-figure figcaption { font-size: 9px; margin-top: 9px; }
  .about { display: block; padding-block: 32px 10px; }
  .section-label { font-size: 12px; margin-bottom: 14px; color: var(--brown); }
  .about h2 { font-size: 28px; line-height: 1.5; letter-spacing: -.045em; }
  .about-description { border: 0; padding: 0; font-size: 13px; margin-top: 18px; }
  .about-description br + br { display: none; }
  .section-space { padding-block: 52px; }
  h2 { font-size: 34px; }
  .section-heading { display: block; margin-bottom: 28px; }
  .section-heading p { font-size: 13px; line-height: 1.9; margin-top: 18px; }
  .product-grid { grid-template-columns: 1fr; gap: 36px; }
  .product-image-link img { height: auto; aspect-ratio: 1.35; }
  .product-number { margin-top: 15px; font-size: 12px; }
  .product-item h3 { font-size: 26px; margin-top: 0; }
  .product-item > p { min-height: 0; font-size: 13px; margin: 4px 0 14px; }
  .product-item .text-link { font-size: 13px; }
  .image-note { font-size: 10px; margin-top: 28px; padding-top: 16px; }
  .service-layout { grid-template-columns: 1fr; gap: 28px; }
  .service-heading h2 { font-size: 34px; }
  .service-heading p { font-size: 13px; margin-top: 17px; }
  .service-heading .text-link { font-size: 13px; margin-top: 20px; }
  .faq-list summary { font-size: 17px; padding-block: 19px; }
  .faq-list details p { font-size: 12px; }
  .mini-section { padding-block: 40px; }
  .mini-copy h2 { font-size: clamp(28px, 7.5vw, 38px); }
  .mini-copy p { font-size: 13px; }
  .desktop-break { display: none; }
  .mini-feature { grid-template-columns: .8fr 1fr; }
  .mini-panel { padding: 23px 19px; }
  .mini-panel h3 { font-size: 28px; }
  .mini-steps { margin-block: 14px 20px; }
  .mini-steps li { font-size: 12px; padding-block: 8px; }
  .mini-steps span { font-size: 10px; width: 25px; }
  .mini-panel .button { padding: 10px 12px; gap: 6px; font-size: 11px; }
  .mini-panel .icon { width: 15px; }
  .mini-scene { min-height: 300px; object-position: 45% center; }
  .site-footer { padding-top: 32px; }
  .footer-main { grid-template-columns: 1fr; gap: 26px; padding-bottom: 28px; }
  .footer-brand > p { padding-left: 43px; }
  .footer-links nav { gap: 20px; }
  .footer-bottom { font-size: 9px; }
  .guide-dialog { padding: 34px 24px 24px; width: calc(100% - 28px); max-height: calc(100dvh - 28px); }
  .guide-dialog h2 { font-size: 29px; }
  .dialog-label { padding-right: 20px; font-size: 11px; }
  .guide-list { margin-block: 24px; padding-left: 22px; }
  .guide-list p { font-size: 12px; }
  .document { padding-block: 30px 56px; }
  .document h1 { font-size: 36px; }
  .document-lead { font-size: 14px; }
  .document-toc { gap: 10px 20px; }
  .document-section h2 { font-size: 23px; }
  .document-section p, .document-section li { font-size: 13px; }
}
@media (max-width: 359px) {
  .hero h1 { font-size: 37px; }
  .hero-copy > p { font-size: 12px; }
  .hero-actions { gap: 20px; }
  .about h2 { font-size: 25px; }
  .mini-feature { grid-template-columns: .6fr 1fr; }
  .mini-panel { padding: 22px 15px; }
  .mini-panel h3 { font-size: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}