:root {
  --graphite: #202225;
  --charcoal: #282b2b;
  --orange: #f26a21;
  --white: #ffffff;
  --off-white: #f5f5f3;
  --light-grey: #e9e9e6;
  --text-grey: #686d70;
  --max-width: 1240px;
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --space-section: clamp(5rem, 10vw, 9.5rem);
  --font-display: "Aptos Display", Aptos, Arial, sans-serif;
  --font-body: Aptos, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--graphite); background: var(--white); font-family: var(--font-body); font-size: 1rem; line-height: 1.55; text-rendering: optimizeLegibility; }
html[lang="zh-CN"] body { font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif; }
html[lang="zh-CN"] .eyebrow, html[lang="zh-CN"] .site-nav, html[lang="zh-CN"] .language-selector, html[lang="zh-CN"] .image-caption, html[lang="zh-CN"] .technology-line, html[lang="zh-CN"] h1, html[lang="zh-CN"] h2, html[lang="zh-CN"] h3, html[lang="zh-CN"] .method-flow strong { letter-spacing: 0; text-transform: none; }
img { display: block; max-width: 100%; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
.skip-link { position: fixed; top: 0; left: 1rem; z-index: 20; padding: .65rem .9rem; color: var(--white); background: var(--graphite); transform: translateY(-150%); transition: transform .2s ease; }
.skip-link:focus { transform: translateY(1rem); }
.container { width: min(var(--max-width), calc(100% - (var(--gutter) * 2))); margin-inline: auto; }
.section-white, .section-offwhite, .section-charcoal { width: 100%; }
.section-white { background: var(--white); }
.section-offwhite { background: var(--off-white); }
.section-charcoal { color: var(--white); background: var(--charcoal); }
.eyebrow { margin: 0 0 1.25rem; color: var(--orange); font-size: .76rem; font-weight: 700; letter-spacing: .15em; line-height: 1.3; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; letter-spacing: -.035em; line-height: 1.08; }
h1 { max-width: 760px; margin-bottom: 1.75rem; font-size: clamp(2.85rem, 6vw, 5.55rem); }
h1 span { color: var(--orange); }
h2 { margin-bottom: 1.5rem; font-size: clamp(2.25rem, 4.5vw, 4.25rem); }
h3 { margin-bottom: .85rem; font-size: clamp(1.35rem, 2vw, 1.75rem); }
.hero { padding: clamp(2rem, 4vw, 3.4rem) 0 var(--space-section); }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--light-grey); backdrop-filter: blur(12px); }
.header-inner { display: flex; min-height: 94px; align-items: center; justify-content: space-between; gap: 2rem; }
.brand-link { display: block; width: 180px; flex-shrink: 0; }
.brand-link img { width: 100%; height: auto; }
.site-nav { display: flex; align-items: center; gap: clamp(1.25rem, 3vw, 3.2rem); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.site-nav a { text-decoration: none; }
.site-nav a:not(.nav-cta) { position: relative; padding: .7rem 0; }
.language-selector { display:flex; align-items:center; gap:.38rem; color:var(--text-grey); font-size:.72rem; font-weight:700; letter-spacing:.08em; line-height:1; }
.language-selector a { color:inherit; text-decoration:none; }
.language-flag { letter-spacing: 0; }
.language-active { color:var(--graphite); }
.language-pending { opacity:.5; cursor:default; }
.site-nav a:not(.nav-cta)::after, .text-link::after { position: absolute; right: 0; bottom: .35rem; left: 0; height: 2px; background: var(--orange); content: ""; transform: scaleX(0); transform-origin: right; transition: transform .22s ease; }
.site-nav a:not(.nav-cta):hover::after, .text-link:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-cta { padding: .75rem 1rem; color: var(--white); background: var(--graphite); }
.menu-toggle { display: none; border: 1px solid var(--graphite); padding: .65rem .8rem; color: var(--graphite); background: transparent; font: inherit; font-size: .76rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.hero-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: clamp(2rem, 7vw, 7.5rem); align-items: start; }
.hero-copy { padding-top: 0; }
.hero-lead { max-width: 610px; margin-bottom: 1rem; font-size: clamp(1.2rem, 2vw, 1.55rem); line-height: 1.35; }
.hero-support { max-width: 520px; margin-bottom: 2.2rem; color: var(--text-grey); font-size: .98rem; }
.hero-visual { position: relative; margin-top: 0; }
.hero-visual picture, .hero-visual img { width: 100%; }
.hero-visual img { aspect-ratio: 4 / 5; object-fit: cover; }
.image-caption { margin: .7rem 0 0; color: var(--text-grey); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: .8rem 1.35rem; border: 1px solid transparent; font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-decoration: none; text-transform: uppercase; transition: background .2s ease, color .2s ease, border-color .2s ease; }
.button-orange { color: var(--white); background: var(--orange); }
.button-orange:hover { color: var(--white); background: var(--graphite); }
.hero-motto { max-width: 460px; margin: clamp(3rem, 6vw, 6rem) 0 0; padding-top: 1rem; border-top: 1px solid var(--light-grey); color: var(--text-grey); font-family: var(--font-display); font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.2; }
.challenge, .services, .method, .landscape, .why, .senior, .contact { padding: var(--space-section) 0; }
.section-intro { max-width: 760px; }
.section-intro > p:last-child { max-width: 720px; color: var(--text-grey); font-size: 1.12rem; }
.challenge-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(2rem, 7vw, 7rem); margin-top: clamp(3rem, 7vw, 5.5rem); }
.challenge-item { padding-right: 2rem; border-right: 1px solid #d9dad6; }
.challenge-item:last-child { border-right: 0; }
.accent-rule { display: block; width: 38px; height: 4px; margin-bottom: 1.35rem; background: var(--orange); }
.challenge-item p, .service-card p, .reason p, .senior-copy p, .contact-copy p, .contact-details p { color: var(--text-grey); }
.services .section-intro { margin-bottom: clamp(3rem, 6vw, 5rem); }
.service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 3vw, 3.5rem); }
.service-card { min-height: 100%; padding-top: 1rem; border-top: 1px solid var(--graphite); }
.service-number { margin-bottom: 1.4rem; color: var(--orange) !important; font-family: var(--font-display); font-size: 2.25rem; line-height: 1; }
.service-detail { margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--light-grey); font-size: .92rem; line-height: 1.6; }
.method-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(3rem, 9vw, 9rem); align-items: start; }
.method-flow { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; margin: .4rem 0 0; padding: 0; list-style: none; border-top: 1px solid var(--graphite); }
.method-flow li { min-height: 180px; padding: 1.35rem 1.25rem 1.5rem 0; border-bottom: 1px solid var(--graphite); }
.method-flow li:nth-child(odd) { margin-right: 1.5rem; border-right: 1px solid var(--graphite); }
.method-flow li:nth-child(even) { padding-left: 1.5rem; }
.method-flow span { display: block; margin-bottom: 1.7rem; color: var(--orange); font-size: .8rem; font-weight: 700; letter-spacing: .1em; }
.method-flow strong { display: block; margin-bottom: .45rem; font-family: var(--font-display); font-size: 1.55rem; font-weight: 500; letter-spacing: -.02em; }
.method-flow small { display: block; max-width: 170px; color: var(--text-grey); font-size: .93rem; }
.landscape-heading, .why-heading { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, .8fr); gap: clamp(2rem, 8vw, 8rem); align-items: end; margin-bottom: clamp(3rem, 6vw, 5rem); }
.landscape-heading > p, .why-heading > p { margin-bottom: .4rem; color: var(--text-grey); font-size: 1.05rem; }
.landscape-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.25rem, 2vw, 2rem); }
.landscape-item { margin: 0; }
.landscape-item picture, .landscape-item img { width: 100%; }
.landscape-item img { aspect-ratio: 1.35 / 1; object-fit: cover; }
.landscape-item figcaption { margin-top: .75rem; font-size: .78rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.technology-line { margin: clamp(3rem, 6vw, 5rem) 0 0; padding-top: 1.25rem; border-top: 1px solid #d5d6d2; color: var(--text-grey); font-size: .84rem; letter-spacing: .05em; }
.why { padding-bottom: calc(var(--space-section) + 1rem); }
.why-heading > .section-intro h2 { color: var(--white); }
.why-heading > p { color: #c2c5c5; }
.reason-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(2rem, 6vw, 6rem); }
.reason { padding: 2rem 0; border-top: 1px solid #555a5a; }
.reason h3 { color: var(--white); }
.reason p { color: #c2c5c5; }
.senior-grid { display: grid; grid-template-columns: minmax(240px, .6fr) minmax(0, 1fr); gap: clamp(2.5rem, 9vw, 9rem); align-items: center; }
.senior-photo { max-width: 400px; }
.senior-photo picture { display: block; aspect-ratio: 4 / 5; overflow: hidden; }
.senior-photo img { width: 150%; max-width: none; height: auto; }
.role { margin-top: -.7rem; color: var(--orange) !important; font-size: 1.05rem; font-weight: 700; }
.senior-lead { color: var(--graphite) !important; font-family: var(--font-display); font-size: clamp(1.3rem, 2.2vw, 1.8rem); line-height: 1.2; }
.text-link { position: relative; display: inline-block; margin-top: .8rem; padding-bottom: .45rem; font-weight: 700; text-decoration: none; }
.text-link::after { bottom: 0; }
.contact { padding-top: calc(var(--space-section) * .85); padding-bottom: calc(var(--space-section) * .85); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(260px, .65fr); gap: clamp(2rem, 8vw, 8rem); align-items: end; }
.contact-copy h2 { max-width: 790px; }
.contact-copy > p:last-child { max-width: 500px; font-size: 1.18rem; }
.contact-details { padding-left: 2rem; border-left: 3px solid var(--orange); }
.contact-details p { margin-bottom: 1rem; }
.contact-details .contact-name { color: var(--graphite); font-family: var(--font-display); font-size: 1.4rem; font-weight: 500; }
.contact-email { display: inline-block; margin: .8rem 0 .45rem; color: var(--graphite); font-size: 1.05rem; font-weight: 700; text-decoration: none; }
.site-footer { padding: 1.7rem 0; color: #c2c5c5; background: var(--graphite); font-size: .82rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; }
.footer-inner p { margin: 0; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: #c2c5c5; text-decoration: none; }
.footer-links a:hover { color: var(--white); }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  .header-inner { min-height: 78px; }
  .brand-link { width: 150px; }
  .menu-toggle { display: block; }
  .site-nav { position: absolute; top: calc(100% + 1px); right: var(--gutter); left: var(--gutter); display: none; flex-direction: column; align-items: stretch; gap: 0; padding: .7rem 1rem 1rem; background: var(--white); border: 1px solid var(--light-grey); box-shadow: 0 16px 30px rgba(32,34,37,.08); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .9rem 0; }
  .language-selector { padding:.9rem 0; }
  .site-nav a:not(.nav-cta)::after { bottom: .4rem; }
  .nav-cta { text-align: center; }
  .hero-grid, .method-grid, .landscape-heading, .why-heading, .senior-grid, .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-copy { padding-top: 0; }
  .hero-visual { margin-top: 0; }
  .landscape-heading, .why-heading { align-items: start; }
  .senior-photo { max-width: 420px; }
}

@media (max-width: 640px) {
  :root { --gutter: 1.25rem; --space-section: 5rem; }
  h1 { font-size: clamp(2.5rem, 12vw, 4rem); }
  h2 { font-size: clamp(2.15rem, 10vw, 3.2rem); }
  .hero-lead { font-size: 1.15rem; }
  .challenge-grid, .service-grid, .landscape-grid, .reason-grid { grid-template-columns: 1fr; }
  .challenge-item { padding-right: 0; padding-bottom: 2rem; border-right: 0; border-bottom: 1px solid #d9dad6; }
  .challenge-item:last-child { padding-bottom: 0; border-bottom: 0; }
  .service-card { padding-bottom: 2rem; }
  .service-card:last-child { padding-bottom: 0; }
  .method-flow { grid-template-columns: 1fr; }
  .method-flow li, .method-flow li:nth-child(even) { min-height: auto; margin: 0; padding: 1.25rem 0 1.5rem; border-right: 0; }
  .method-flow li:last-child { border-bottom: 0; }
  .landscape-item img { aspect-ratio: 1.25 / 1; }
  .senior-grid { gap: 2.2rem; }
  .senior-photo { max-width: none; }
  .contact-details { padding-left: 1.25rem; }
  .footer-inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Contact form */
.contact-form-wrap { margin-top: 4rem; }
.contact-form { max-width: 900px; border-top: 1px solid var(--graphite); padding-top: 2rem; }
.form-grid { display:grid; grid-template-columns:1fr 1fr; gap:1.5rem; }
.contact-form label { font-size:1rem; display:block; }
.contact-form input:not([type=checkbox]), .contact-form textarea { display:block; width:100%; margin-top:.5rem; padding:.9rem; border:1px solid #757575; border-radius:0; color:var(--graphite); background:white; font:inherit; }
.contact-form textarea { resize:vertical; }
.full-width { grid-column:1/-1; }
.contact-form .consent-label { display:flex; align-items:flex-start; gap:.8rem; margin:1.5rem 0; }
.consent-label input { width:1.3rem; height:1.3rem; flex-shrink:0; accent-color:var(--graphite); }
.privacy-summary, .form-note { font-size:.9rem; line-height:1.6; margin-top:1.5rem; }
.form-trap { position:absolute; left:-9999px; }
.form-submit { font:inherit; border:0; cursor:pointer; padding:1rem 1.5rem; }
.form-submit:disabled { opacity:.6; cursor:wait; }
input:focus-visible, textarea:focus-visible, button:focus-visible { outline:3px solid var(--orange); outline-offset:3px; }
.privacy-page { max-width:850px; padding:5rem 1.5rem; margin:auto; }
.privacy-page h1 { font-size:clamp(2rem,6vw,3rem); }
.privacy-page h2 { font-size:1.4rem; margin-top:2rem; }
@media(max-width:640px){.form-grid{grid-template-columns:1fr;}.contact-form-wrap{margin-top:2.5rem;}}

.landscape-column{display:flex;flex-direction:column;gap:2rem;min-width:0}.landscape-columns{align-items:start}.landscape-columns .landscape-item img{height:auto;aspect-ratio:auto}.landscape-column picture{display:block}@media(max-width:640px){.landscape-column{display:contents}.landscape-columns .landscape-item:nth-child(1){order:0}.landscape-columns .landscape-item:nth-child(2){order:1}.landscape-columns .landscape-item:nth-child(3){order:2}}

/* V1 refinement: compact hero, precise matrix and brief selected entrances. */
.hero { padding-bottom:clamp(3rem,5vw,5rem); }
.hero-visual img { height:auto; }
.reveal { opacity:1; transform:none; transition:none; }
.motion-ready { opacity:0; transform:translateY(28px); transition:opacity 620ms ease-out var(--reveal-delay,0ms), transform 620ms cubic-bezier(.22,.61,.36,1) var(--reveal-delay,0ms); }
.motion-ready.is-visible { opacity:1; transform:none; }
.method-flow { position:relative; grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(180px,1fr)); border-top:1px solid var(--graphite); border-bottom:1px solid var(--graphite); }
.method-flow::before { content:""; position:absolute; top:0; bottom:0; left:50%; width:1px; background:var(--graphite); }
.method-flow li, .method-flow li:nth-child(odd), .method-flow li:nth-child(even) { min-height:0; margin:0; padding:1.35rem 1.5rem 1.5rem; border:0; }
.method-flow li:nth-child(-n+2) { border-bottom:1px solid var(--graphite); }
#lets-talk { background:var(--off-white); }
@media(max-width:640px) {
 .method-flow { grid-template-columns:1fr; grid-template-rows:none; }
 .method-flow::before { display:none; }
 .method-flow li, .method-flow li:nth-child(odd), .method-flow li:nth-child(even) { padding:1.25rem 0 1.5rem; border-bottom:1px solid var(--graphite); }
 .method-flow li:last-child { border-bottom:0; }
}
@media(prefers-reduced-motion:reduce) { .motion-ready { opacity:1; transform:none; transition:none; } }

/* The hero photograph shares the copy column's top and bottom boundaries. */
@media(min-width:901px) {
 .hero-grid { align-items:stretch; }
 .hero-visual { min-height:0; }
 .hero-visual picture { position:absolute; inset:0; display:block; }
 .hero-visual img { width:100%; height:100%; aspect-ratio:auto; object-fit:cover; object-position:center; }
 .hero-visual .image-caption { position:absolute; top:100%; left:0; }
}