:root {
  --paper: #f5f2ea;
  --paper-deep: #ebe8df;
  --ink: #173a40;
  --ink-deep: #102f34;
  --muted: #5d6d6e;
  --line: #cbd1c8;
  --lime: #d9ec75;
  --blue: #b8d6e4;
  --white: #fffefa;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink-deep); font-family: "Noto Sans CJK SC", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid #46778c; outline-offset: 4px; }
.shell { width: min(100% - 72px, 1320px); margin-inline: auto; }
.skip-link { position: absolute; left: 18px; top: -80px; z-index: 100; background: var(--lime); padding: 10px 15px; }
.skip-link:focus { top: 12px; }

.site-header { position: relative; z-index: 5; border-bottom: 1px solid var(--line); }
.header-inner { height: 93px; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 15px; flex: 1; min-width: 0; }
.brand-mark { width: 45px; height: 45px; flex: 0 0 45px; display: grid; place-items: center; background: var(--ink); color: var(--paper); font: 700 30px/.9 Georgia, serif; letter-spacing: -4px; padding-right: 4px; }
.brand-dot { color: var(--lime); }
.brand-words { display: grid; gap: 2px; white-space: nowrap; }
.brand-words strong { font: 700 16px/1.1 Georgia, serif; letter-spacing: .16em; }
.brand-words small { font-size: 11px; letter-spacing: .055em; color: var(--muted); }
.nav { display: flex; align-items: center; gap: clamp(20px, 3vw, 52px); font-size: 13px; font-weight: 700; }
.nav a, .header-link { transition: opacity .2s ease; }
.nav a:hover, .header-link:hover { opacity: .57; }
.header-link { font-size: 12px; font-weight: 700; border-bottom: 1px solid var(--ink); padding-bottom: 4px; white-space: nowrap; }

.hero { overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-grid { min-height: 680px; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr); align-items: stretch; }
.hero-copy { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: 75px 60px 78px 0; }
.eyebrow, .section-index, .section-kicker, .detail-number { font: 700 11px/1.3 Georgia, "Noto Sans CJK SC", sans-serif; letter-spacing: .18em; }
.eyebrow { display: flex; align-items: center; gap: 13px; margin: 0 0 47px; }
.eyebrow-line { width: 26px; height: 2px; background: var(--ink); }
.hero h1, .company-content h2, .section-heading h2, .contact-section h2, .error-page h1 { font-family: "Noto Serif CJK SC", "Songti SC", SimSun, serif; font-weight: 600; letter-spacing: -.065em; }
.hero h1 { font-size: clamp(48px, 5.1vw, 81px); line-height: 1.25; margin: 0 0 29px; white-space: nowrap; }
.hero h1 em { font-style: normal; position: relative; z-index: 0; }
.hero h1 em::after { content: ""; position: absolute; z-index: -1; height: .25em; left: 0; right: 0; bottom: .08em; background: var(--lime); }
.hero-intro { max-width: 560px; margin: 0; font-size: 16px; line-height: 2; color: #4e6163; }
.hero-actions { display: flex; align-items: center; gap: 27px; margin-top: 40px; }
.button { min-height: 52px; padding: 14px 21px; display: inline-flex; align-items: center; justify-content: space-between; gap: 35px; font-size: 13px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-3px); }
.button-dark { background: var(--ink); color: var(--white); }
.button-dark:hover { background: #28535a; }
.button-light { background: var(--lime); color: var(--ink); margin-top: 27px; width: fit-content; }
.text-link, .underlined-link { font-size: 13px; font-weight: 700; border-bottom: 1px solid currentColor; padding-bottom: 4px; }
.text-link span, .underlined-link span { margin-left: 16px; }
.hero-art { min-height: 580px; position: relative; isolation: isolate; overflow: hidden; margin: 32px 0; background: var(--ink); color: var(--paper); }
.hero-art::before { content: ""; position: absolute; inset: 0; opacity: .19; background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px); background-size: 44px 44px; }
.hero-art::after { content: ""; position: absolute; width: 340px; height: 340px; border-radius: 50%; background: var(--lime); filter: blur(80px); opacity: .16; left: 32%; top: 40%; }
.art-top { position: absolute; top: 29px; left: 30px; right: 30px; display: flex; justify-content: space-between; z-index: 3; font: 700 10px Georgia, serif; letter-spacing: .16em; }
.orbit { position: absolute; width: 80%; aspect-ratio: 1; left: 10%; top: 10%; border: 1px solid rgba(231,246,244,.45); border-radius: 50%; transform: rotate(-23deg) scaleX(.71); }
.orbit-two { width: 104%; left: -2%; top: -1%; border-color: rgba(231,246,244,.22); transform: rotate(23deg) scaleX(.65); }
.art-letter { position: absolute; z-index: 2; left: 50%; top: 47%; transform: translate(-50%, -50%); font: 500 clamp(270px, 30vw, 475px)/1 Georgia, serif; letter-spacing: -.14em; padding-right: .12em; color: var(--paper); }
.art-caption { position: absolute; z-index: 3; left: 30px; right: 30px; bottom: 28px; display: flex; justify-content: space-between; font: italic 20px Georgia, serif; }
.hero-bottom { display: flex; justify-content: space-between; border-top: 1px solid var(--line); padding: 19px 0 22px; font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.hero-bottom span:last-child span { margin-left: 8px; }

.section { padding: 120px 0; }
.company-section { border-bottom: 1px solid var(--line); }
.company-grid { display: grid; grid-template-columns: 26% 1fr; gap: 40px; }
.section-side { display: flex; align-items: flex-start; gap: 18px; padding-top: 7px; }
.section-index { white-space: nowrap; color: #576f6e; }
.section-rule { width: 68px; height: 1px; background: var(--ink); margin-top: 7px; }
.section-kicker { margin: 0 0 22px; color: #598079; }
.company-content { max-width: 815px; }
.company-content h2, .section-heading h2 { font-size: clamp(42px, 4vw, 65px); line-height: 1.3; margin: 0 0 35px; }
.large-copy { font-size: clamp(19px, 1.65vw, 25px); line-height: 1.9; margin: 0 0 20px; }
.body-copy { max-width: 670px; color: var(--muted); line-height: 2; font-size: 15px; margin: 0 0 33px; }
.body-copy strong { color: var(--ink); }
.underlined-link { display: inline-block; }

.product-section { background: var(--paper-deep); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 42px; }
.section-heading .section-index { display: block; margin-bottom: 55px; }
.section-heading h2 { margin-bottom: 0; }
.heading-en { display: block; font: 400 clamp(17px, 1.65vw, 24px)/1.5 Georgia, serif; letter-spacing: .01em; color: #56706f; margin-top: 8px; }
.section-heading > p { max-width: 270px; font-size: 14px; line-height: 1.8; color: var(--muted); margin: 0 0 13px; }
.product-showcase { display: grid; grid-template-columns: 1.08fr .92fr; background: var(--white); border: 1px solid #d4d9d1; min-height: 630px; }
.product-visual { position: relative; overflow: hidden; background: #b8d6e4; }
.product-visual::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 50% 62%, rgba(255,255,255,.8), transparent 59%); }
.visual-label { position: absolute; z-index: 2; left: 32px; right: 32px; top: 27px; display: flex; justify-content: space-between; font: 700 11px Georgia, "Noto Sans CJK SC", sans-serif; letter-spacing: .09em; }
.screen-pair { position: absolute; display: flex; gap: 20px; left: 50%; bottom: -100px; transform: translateX(-50%) rotate(-5deg); width: min(83%, 495px); }
.screen-pair img { width: calc(50% - 10px); height: auto; align-self: flex-start; border: 7px solid #f9faf8; border-radius: 27px; box-shadow: 0 20px 45px rgba(20,54,62,.23); }
.screen-pair img:nth-child(2) { transform: translateY(77px) rotate(9deg); }
.product-details { padding: 50px clamp(28px, 4vw, 68px) 47px; display: flex; flex-direction: column; justify-content: center; }
.detail-number { color: #70908b; }
.product-details h3 { font-family: "Noto Serif CJK SC", "Songti SC", SimSun, serif; font-size: 27px; font-weight: 600; margin: 9px 0 9px; }
.product-details p { font-size: 14px; line-height: 1.9; color: var(--muted); margin: 0; }
.detail-divider { height: 1px; background: #d5ddd8; margin: 26px 0; }

.approach-section { padding-bottom: 135px; }
.section-heading.compact { margin-bottom: 47px; }
.approach-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); }
.approach-grid article { padding: 36px 40px 10px 0; border-right: 1px solid var(--line); min-height: 210px; }
.approach-grid article:not(:first-child) { padding-left: 40px; }
.approach-grid article:last-child { border-right: 0; }
.approach-grid article > span { font: 700 11px Georgia, serif; color: #78918c; }
.approach-grid h3 { font-family: "Noto Serif CJK SC", "Songti SC", SimSun, serif; font-size: 25px; margin: 27px 0 10px; }
.approach-grid p { color: var(--muted); font-size: 14px; line-height: 1.9; margin: 0; }

.contact-section { background: var(--lime); padding: 92px 0 101px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 35px; }
.contact-section h2 { font-size: clamp(45px, 4.3vw, 68px); line-height: 1.25; margin: 36px 0 0; }
.contact-details { padding-bottom: 7px; }
.contact-details p { margin: 0 0 12px; font-size: 13px; }
.contact-details > a { font: 400 clamp(19px, 2.5vw, 36px)/1.4 Georgia, serif; border-bottom: 1px solid var(--ink); overflow-wrap: anywhere; }
.contact-details > a span { font-size: .6em; }
.contact-details .contact-company { margin: 42px 0 0; line-height: 1.8; color: #426260; }
.site-footer { background: var(--ink); color: var(--paper); padding: 44px 0 24px; }
.footer-main, .footer-bottom { display: flex; justify-content: space-between; gap: 25px; align-items: center; }
.footer-brand { font: 700 62px/.9 Georgia, serif; letter-spacing: -.13em; white-space: nowrap; }
.footer-brand > span { color: var(--lime); }
.footer-brand small { vertical-align: middle; font: 700 14px Georgia, serif; letter-spacing: .12em; margin-left: 14px; }
.footer-main > div { display: flex; gap: 35px; font-size: 12px; }
.footer-main a:hover, .footer-bottom a:hover { text-decoration: underline; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.28); padding-top: 22px; margin-top: 42px; font-size: 11px; color: #c6d4d1; }
.error-page { min-height: 100vh; display: grid; place-items: center; padding: 30px; }
.error-page main { max-width: 670px; }
.error-page h1 { font-size: clamp(38px, 5vw, 65px); margin: 20px 0; }
.error-page p { color: var(--muted); line-height: 1.8; margin-bottom: 30px; }

@media (max-width: 980px) {
  .header-link { display: none; }
  .hero-grid { min-height: 0; }
  .hero-copy { padding: 75px 28px 80px 0; }
  .hero h1 { font-size: clamp(43px, 5vw, 63px); }
  .hero-art { min-height: 510px; }
  .product-showcase { min-height: 580px; }
  .screen-pair { width: 88%; }
}

@media (max-width: 700px) {
  .shell { width: min(100% - 34px, 560px); }
  .header-inner { height: 76px; gap: 10px; }
  .brand { gap: 10px; }
  .brand-mark { width: 38px; height: 38px; flex-basis: 38px; font-size: 26px; }
  .brand-words strong { font-size: 13px; letter-spacing: .11em; }
  .brand-words small { font-size: 9px; }
  .nav { gap: 15px; font-size: 11px; }
  .nav a:first-child { display: none; }
  .hero-grid, .company-grid, .product-showcase, .contact-grid { grid-template-columns: 1fr; }
  .hero-copy { padding: 73px 0 55px; }
  .eyebrow { margin-bottom: 28px; }
  .hero h1 { white-space: normal; font-size: clamp(45px, 10vw, 62px); }
  .hero-intro { font-size: 14px; }
  .hero-actions { gap: 22px; flex-wrap: wrap; }
  .hero-art { min-height: 440px; margin: 0 0 20px; }
  .art-letter { font-size: 320px; }
  .hero-bottom { font-size: 10px; }
  .section { padding: 78px 0; }
  .company-grid { gap: 32px; }
  .company-content h2, .section-heading h2 { font-size: clamp(42px, 9vw, 56px); }
  .large-copy { font-size: 19px; }
  .section-heading { display: block; }
  .section-heading .section-index { margin-bottom: 36px; }
  .section-heading > p { margin-top: 20px; }
  .product-showcase { min-height: 0; }
  .product-visual { min-height: 480px; }
  .screen-pair { width: min(80%, 420px); bottom: -90px; }
  .product-details { padding: 42px 27px 48px; }
  .approach-grid { display: block; }
  .approach-grid article, .approach-grid article:not(:first-child) { padding: 28px 0; min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .approach-grid h3 { margin-top: 16px; }
  .contact-section { padding: 75px 0 80px; }
  .contact-grid { gap: 42px; }
  .contact-section h2 { margin-top: 24px; }
  .footer-main { align-items: flex-start; }
  .footer-main > div { flex-direction: column; gap: 15px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .nav a, .header-link { transition: none; }
}