:root {
  --ink: #17221d;
  --paper: #f6f8f5;
  --muted: #53645a;
  --line: #d4ddd6;
  --mint: #d9eee3;
  --accent: #bee899;
  --mono: "SFMono-Regular", Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Arial, "PingFang SC", "PingFang TC", "Microsoft YaHei", sans-serif; line-height: 1.7; }
html[lang=zh-Hant] body { font-family: Arial, "PingFang TC", "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
a:focus-visible, summary:focus-visible { outline: 3px solid #23755b; outline-offset: 6px; }
h1, h2, h3, h4, p { margin: 0; letter-spacing: 0; }
h2 { font-size: 38px; line-height: 1.35; font-weight: 600; }
h3 { font-size: 23px; line-height: 1.4; }
h4 { font-size: 14px; }
p { color: var(--muted); }
.wrap { width: min(1200px, calc(100% - 64px)); margin: auto; }
.skip { position: fixed; top: -100px; left: 20px; z-index: 50; background: white; padding: 12px; }
.skip:focus { top: 12px; }
header { position: sticky; top: 0; z-index: 20; background: rgb(246 248 245 / .97); border-bottom: 1px solid var(--line); }
.navigation { display: flex; align-items: center; gap: 28px; min-height: 92px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; flex-shrink: 0; }
.symbol { width: 40px; height: 40px; }
.brand b { display: block; font-size: 20px; line-height: 1.4; margin-bottom: 6px; }
.wordmark { width: 175px; height: auto; }
html[lang=en] .wordmark { width: 260px; }
.desktop-nav { display: flex; gap: 24px; font-size: 14px; white-space: nowrap; }
.desktop-nav a:hover, .text-link:hover { color: #2e735c; }
.languages { display: flex; align-items: center; gap: 8px; font: 12px/1.2 var(--mono); }
.languages a { display: grid; place-items: center; min-width: 28px; min-height: 32px; border-bottom: 2px solid transparent; }
.languages a[aria-current] { border-color: currentColor; }
.header-contact { font-size: 14px; padding: 11px 18px; background: var(--ink); color: white; border-radius: 4px; white-space: nowrap; }
.header-contact span { margin-left: 12px; }
.mobile-nav { display: none; }
.hero { position: relative; isolation: isolate; color: white; background: #172623; overflow: hidden; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.hero:before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,23,20,.96) 0%, rgba(8,23,20,.84) 45%, rgba(8,23,20,.24) 100%); z-index: -1; }
.hero-inner { padding: 52px 0 32px; }
.eyebrow { font: 12px/1.6 var(--mono); text-transform: uppercase; color: #426650; }
.hero .eyebrow { color: #c4e9cf; }
.hero h1 { font-size: 68px; line-height: 1.15; margin-top: 50px; font-weight: 600; }
.hero h2 { font-size: 36px; margin-top: 16px; color: #c6e9b4; }
.hero-lead { max-width: 580px; font-size: 18px; line-height: 1.85; color: #d9e4dd; margin-top: 24px; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; padding: 15px 22px; border-radius: 4px; font-size: 14px; font-weight: 600; transition: transform .15s; }
.button:hover { transform: translateY(-2px); }
.light { color: var(--ink); background: var(--accent); }
.dark { background: var(--ink); color: white; }
.text-link { display: inline-flex; align-items: center; gap: 20px; font-size: 14px; border-bottom: 1px solid; padding-bottom: 4px; }
.hero-foot { display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid #6a7a70; margin-top: 58px; padding-top: 22px; font: 11px/1.7 var(--mono); color: #d0dbd4; }
.statement { padding: 48px 0; background: var(--mint); }
.statement-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 50px; }
.statement h2 { font-size: 28px; max-width: 680px; }
.statement p:not(.eyebrow) { max-width: 710px; margin-top: 18px; }
.section { padding: 88px 0; }
.section-heading { max-width: 780px; margin-bottom: 44px; }
.section-heading h2 { margin-top: 15px; }
.section-lead { margin-top: 20px; font-size: 16px; max-width: 690px; }
.services { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px; }
.service { border-top: 1px solid var(--line); padding-top: 24px; }
.index { font: 13px/1.5 var(--mono); color: #3c7355; }
.service .index { color: #ac5847; }
.service h3 { margin: 24px 0 16px; }
.service p { font-size: 15px; min-height: 104px; }
.service ul { list-style: none; padding: 24px 0 0; margin: 18px 0 0; border-top: 1px solid var(--line); font-size: 14px; }
.service li { padding: 6px 0; }
.service li:before { content: "↗"; margin-right: 12px; color: #407960; }
.projects { background: #e9eef1; }
.project { border-top: 1px solid #bfcdd3; }
.project:last-child { border-bottom: 1px solid #bfcdd3; }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
.project summary { display: grid; grid-template-columns: 50px 1fr auto 35px; align-items: center; gap: 20px; padding: 27px 0; }
.tag { font: 10px/1.5 var(--mono); color: #596e7c; }
.expand { font-size: 26px; text-align: right; }
.project[open] .expand { transform: rotate(45deg); }
.project-body { display: grid; grid-template-columns: repeat(3,1fr); gap: 32px; padding: 4px 0 32px 70px; }
.project-body h4 { margin-bottom: 12px; color: #315b6c; }
.project-body p { font-size: 15px; }
.project-body > a { grid-column: 1/-1; justify-self: start; margin-top: 8px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4,1fr); gap: 28px; }
.steps li { border-top: 1px solid var(--line); padding-top: 22px; }
.steps h3 { margin: 25px 0 12px; }
.steps p { font-size: 15px; min-height: 82px; }
.steps small { display: block; font: 11px/1.8 var(--mono); color: #40654f; border-top: 1px solid var(--line); margin-top: 20px; padding-top: 15px; }
.principles { background: #17221d; color: #f4f6f2; }
.principles-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
.principles .eyebrow { color: #b9dba8; }
.principles h2 { margin-top: 20px; max-width: 440px; }
.principle-logo { margin-top: 32px; filter: invert(1); opacity: .6; }
.principles article { display: flex; gap: 24px; padding: 22px 0; border-bottom: 1px solid #425046; }
.principles article:first-child { padding-top: 0; }
.principles .index { color: #b9dba8; }
.principles h3 { font-size: 20px; }
.principles p { color: #bdcabe; font-size: 15px; margin-top: 12px; }
.faq-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; }
.faq h2 { margin-top: 20px; font-size: 32px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 23px 0; font-weight: 600; font-size: 16px; }
.faq summary span { font-size: 22px; flex-shrink: 0; }
.faq details[open] summary span { transform: rotate(45deg); }
.faq details p { padding-bottom: 26px; font-size: 15px; }
.contact { background: var(--accent); }
.contact-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 60px; align-items: center; }
.contact h2 { margin-top: 16px; max-width: 650px; }
.contact p:not(.eyebrow) { margin-top: 20px; max-width: 580px; color: #304e37; }
.contact-action { justify-self: end; }
.email { display: block; margin-top: 20px; font: 14px/1.5 var(--mono); }
footer { padding: 45px 0 24px; background: #f0f3ee; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-bottom: 35px; }
.footer-mark { width: 300px; height: auto; }
.footer-top span { font-size: 14px; color: var(--muted); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); padding-top: 20px; font-size: 12px; color: var(--muted); }
.legal-links { display: flex; flex-wrap: wrap; gap: 20px; }
.legal-links a:hover, .legal-page a:hover { text-decoration: underline; text-underline-offset: 4px; }
.legal-page { padding-top: 48px; padding-bottom: 72px; }
.legal-heading { max-width: 800px; }
.legal-heading .eyebrow { margin-top: 42px; }
.legal-heading h1 { font-size: 44px; line-height: 1.25; margin-top: 16px; }
.legal-updated { font-size: 13px; margin-top: 18px; }
.legal-intro { font-size: 18px; margin-top: 26px; line-height: 1.85; }
.legal-grid { display: grid; grid-template-columns: 240px minmax(0, 760px); gap: 64px; margin-top: 52px; }
.legal-grid aside nav { position: sticky; top: 125px; }
.legal-grid ol { padding-left: 20px; margin-top: 16px; font-size: 14px; color: var(--muted); }
.legal-grid li { margin-bottom: 12px; }
.legal-grid article section { padding: 28px 0; border-top: 1px solid var(--line); scroll-margin-top: 110px; }
.legal-grid article h2 { font-size: 23px; line-height: 1.45; margin-bottom: 16px; }
.legal-grid article p { line-height: 1.95; overflow-wrap: anywhere; }
.legal-related { display: flex; flex-wrap: wrap; gap: 20px 32px; border-top: 1px solid var(--line); padding-top: 28px; font-size: 14px; }
@media (max-width:900px) {
  .legal-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .legal-grid aside nav { position: static; }
  .legal-grid ol { columns: 2; }
  .legal-grid li { break-inside: avoid; }
}
@media (max-width:600px) {
  .legal-heading h1 { font-size: 34px; }
  .legal-intro { font-size: 16px; }
  .legal-grid { margin-top: 32px; }
  .legal-grid ol { columns: 1; }
  .legal-grid article h2 { font-size: 21px; }
  .legal-links { width: 100%; gap: 24px; }
}
@media (min-width:1500px) {
  .hero-inner { padding-top: 65px; padding-bottom: 35px; }
  .hero h1 { margin-top: 60px; }
  .hero-foot { margin-top: 64px; }
}
@media (max-width:1100px) {
  .navigation { gap: 16px; }
  .desktop-nav { gap: 15px; font-size: 13px; }
  html[lang=en] .wordmark { width: 220px; }
  .header-contact { padding: 10px 14px; }
  .principles-grid { gap: 50px; }
}
@media (max-width:900px) {
  .desktop-nav, .header-contact { display: none; }
  .mobile-nav { display: block; }
  .mobile-nav summary { font-size: 13px; padding: 9px 0; }
  .mobile-nav nav { position: absolute; top: 100%; left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 16px 32px; display: grid; gap: 0; }
  .mobile-nav nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .services { gap: 24px; }
  .service p { min-height: 145px; }
  .statement-grid { grid-template-columns: 1fr; gap: 18px; }
  .steps { grid-template-columns: repeat(2,1fr); gap: 35px; }
  .project-body { padding-left: 0; gap: 24px; }
  .faq-grid { gap: 40px; }
  .hero h1 { font-size: 60px; }
  .hero-foot span:last-child { display: none; }
}
@media (max-width:600px) {
  .wrap { width: calc(100% - 40px); }
  .navigation { min-height: 84px; gap: 12px; }
  .symbol { width: 32px; height: 32px; }
  .brand { gap: 9px; }
  .brand b { font-size: 16px; margin-bottom: 4px; }
  .wordmark { width: 136px; }
  html[lang=en] .wordmark { width: 160px; }
  .languages { gap: 2px; font-size: 11px; }
  .languages a { min-width: 23px; }
  .mobile-nav summary { font-size: 11px; }
  .mobile-nav summary span { display: none; }
  .mobile-nav nav { padding: 12px 20px; }
  .hero-inner { padding: 35px 0 25px; }
  .hero .eyebrow { font-size: 10px; }
  .hero h1 { font-size: 43px; margin-top: 45px; }
  .hero h2 { font-size: 27px; margin-top: 15px; }
  .hero-lead { font-size: 16px; margin-top: 20px; }
  .hero:before { background: rgba(8,23,20,.83); }
  .hero-actions { align-items: flex-start; gap: 24px; flex-wrap: wrap; margin-top: 28px; }
  .hero-foot { margin-top: 38px; font-size: 9px; }
  .statement { padding: 32px 0; }
  .statement h2 { font-size: 25px; }
  .section { padding: 58px 0; }
  h2 { font-size: 29px; }
  .section-heading { margin-bottom: 30px; }
  .services { grid-template-columns: 1fr; gap: 32px; }
  .service p { min-height: 0; }
  .service h3 { margin-top: 15px; }
  .service ul { padding-top: 15px; }
  .project summary { grid-template-columns: 30px 1fr 24px; gap: 12px; padding: 22px 0; }
  .project h3 { font-size: 21px; }
  .tag { display: none; }
  .project-body { grid-template-columns: 1fr; gap: 22px; }
  .steps { gap: 28px 20px; }
  .steps h3 { font-size: 21px; }
  .steps p { min-height: 100px; font-size: 14px; }
  .steps small { font-size: 10px; }
  .principles-grid, .faq-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .principle-logo { width: 90px; height: 90px; }
  .principles h2 { font-size: 29px; }
  .faq h2 { font-size: 29px; }
  .contact-action { justify-self: start; }
  .footer-top { align-items: flex-start; flex-direction: column; gap: 20px; }
  .footer-mark { width: 250px; }
  .footer-bottom { flex-wrap: wrap; }
  .footer-bottom > a { display: none; }
}
@media (max-width:360px) {
  .wrap { width: calc(100% - 28px); }
  .navigation { gap: 8px; }
  .wordmark { width: 119px; }
  html[lang=en] .wordmark { width: 132px; }
  .hero h1 { font-size: 38px; }
  .brand b { font-size: 15px; }
}
@media (prefers-reduced-motion:reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}