/* HKPEV — brand palette derived from the logo: green #548235, orange #F7901E */
:root {
  --green: #548235;
  --green-700: #3E6324;
  --green-900: #1C2E12;
  --green-950: #13200C;
  --green-50: #F1F6EA;
  --green-100: #E2ECD5;
  --orange: #F7901E;
  --orange-600: #E07A0A;
  --orange-50: #FEF3E6;
  --ink: #16211A;
  --body: #3D4A41;
  --muted: #6A766E;
  --line: #E3E8DF;
  --bg: #FFFFFF;
  --bg-soft: #F7F9F4;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 1px 2px rgba(22, 33, 26, .04), 0 12px 32px -12px rgba(22, 33, 26, .14);
  --font: "Plus Jakarta Sans", "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--body);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
html[lang="zh-CN"] body { line-height: 1.75; }
img { max-width: 100%; display: block; }
a { color: var(--green); text-decoration: none; }
h1, h2, h3, h4 { color: var(--ink); margin: 0; line-height: 1.2; letter-spacing: -0.02em; }
html[lang="zh-CN"] h1, html[lang="zh-CN"] h2, html[lang="zh-CN"] h3 { letter-spacing: 0; line-height: 1.3; }
p { margin: 0; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 15px/1 var(--font);
  padding: 15px 24px; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .2s ease, background .2s ease, box-shadow .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 20px -8px rgba(84, 130, 53, .6); }
.btn-primary:hover { background: var(--green-700); transform: translateY(-1px); }
.btn-ghost { color: var(--ink); border-color: var(--line); background: #fff; }
.btn-ghost:hover { border-color: var(--green); color: var(--green); }
.btn-sm { padding: 11px 18px; font-size: 14px; }
.btn-block { width: 100%; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--green); margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 22px; height: 3px; border-radius: 3px; background: var(--orange); }
.eyebrow.light { color: #B9D59F; }
html[lang="zh-CN"] .eyebrow { letter-spacing: .08em; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 20px -12px rgba(22, 33, 26, .2); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand img { width: 56px; height: auto; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 15.5px; font-weight: 800; letter-spacing: -0.01em; white-space: nowrap; }
.brand-text small { font-size: 12px; color: var(--muted); font-weight: 500; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--body); font-weight: 500; font-size: 15px; position: relative; padding: 6px 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; border-radius: 2px;
  background: var(--orange); transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.lang-toggle {
  border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 8px 12px;
  font: 600 13px/1 var(--font); color: var(--muted); cursor: pointer; display: inline-flex; gap: 4px; white-space: nowrap; flex-shrink: 0;
}
.lang-toggle .sep { opacity: .4; }
.lang-toggle [data-lang].on { color: var(--green); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; position: relative; }
.menu-toggle span { position: absolute; left: 11px; right: 11px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s ease, top .25s ease; }
.menu-toggle span:first-child { top: 16px; }
.menu-toggle span:last-child { top: 24px; }
.menu-open .menu-toggle span:first-child { top: 20px; transform: rotate(45deg); }
.menu-open .menu-toggle span:last-child { top: 20px; transform: rotate(-45deg); }

/* Hero */
.hero {
  position: relative; padding: 72px 0 88px; overflow: hidden;
  background:
    radial-gradient(900px 500px at 85% 20%, rgba(247, 144, 30, .10), transparent 60%),
    radial-gradient(800px 600px at 10% 90%, rgba(84, 130, 53, .10), transparent 60%),
    linear-gradient(180deg, #FBFCF9 0%, #FFFFFF 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero h1 { position: relative; isolation: isolate; font-size: clamp(36px, 5vw, 60px); font-weight: 800; letter-spacing: -0.035em; }
html[lang="zh-CN"] .hero h1 { font-size: clamp(34px, 4.6vw, 54px); letter-spacing: 0; }
.hero h1 .hl { color: var(--green); position: relative; white-space: nowrap; }
.hero h1 .hl::after {
  content: ""; position: absolute; left: -2%; right: -2%; bottom: .06em; height: .2em;
  background: var(--orange); opacity: .35; border-radius: 6px; z-index: -1;
}
.lead { font-size: 18.5px; margin-top: 24px; max-width: 560px; color: var(--body); }
.hero-ctas { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-meta { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 32px; }
.hero-meta li { display: flex; flex-direction: column; gap: 2px; padding-left: 16px; border-left: 3px solid var(--green-100); }
.hero-meta b { font-size: 28px; color: var(--ink); font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; }
.hero-meta span { font-size: 14px; color: var(--muted); }

.hero-visual { position: relative; aspect-ratio: 1 / 1; max-width: 540px; width: 100%; justify-self: center; }
.orbit { width: 100%; height: 100%; overflow: visible; }
.spin-slow { transform-origin: 260px 260px; animation: spin 60s linear infinite; }
.swoosh { animation: swoosh 9s ease-in-out infinite alternate; }
.dash-flow path { stroke-dasharray: 5 7; animation: flow 1.6s linear infinite; }
.pulse { transform-box: fill-box; transform-origin: center; animation: pulse 2.6s ease-out infinite; }
.pulse.d2 { animation-delay: .8s; }
.pulse.d3 { animation-delay: 1.6s; }
.chip {
  position: absolute; background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 14px 8px 28px; font-size: 13px; font-weight: 600; color: var(--ink);
  box-shadow: var(--shadow); white-space: nowrap; animation: float 6s ease-in-out infinite;
}
.chip::before { content: ""; position: absolute; left: 12px; top: 50%; width: 8px; height: 8px; margin-top: -4px; border-radius: 50%; background: var(--orange); }
.chip-a { right: 2%; bottom: 14%; }
.chip-b { right: -2%; top: 24%; animation-delay: -1.5s; }
.chip-c { left: 14%; top: 6%; animation-delay: -3s; }
.chip-d { left: -2%; bottom: 24%; animation-delay: -4.5s; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes flow { to { stroke-dashoffset: -24; } }
@keyframes pulse { 0% { transform: scale(.6); opacity: .9; } 100% { transform: scale(1.9); opacity: 0; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes swoosh { from { stroke-dashoffset: 0; } to { stroke-dashoffset: 260; } }

/* Strip */
.strip { background: var(--green-900); color: #fff; }
.strip-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip-inner > div { padding: 26px 24px; display: flex; flex-direction: column; gap: 4px; border-left: 1px solid rgba(255, 255, 255, .08); }
.strip-inner > div:first-child { border-left: 0; padding-left: 0; }
.strip .k { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: #A9C690; font-weight: 600; }
.strip .v { font-size: 16px; font-weight: 600; }

/* Sections */
.section { padding: 112px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; }
.section-head .sub { margin-top: 18px; font-size: 17.5px; color: var(--muted); }

/* Services */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.svc-card {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px 32px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.svc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--green-100); }
.svc-card.featured { background: linear-gradient(180deg, var(--green-50), #fff 55%); border-color: var(--green-100); }
.svc-card.featured::before {
  content: ""; position: absolute; left: 30px; right: 30px; top: -1px; height: 3px; border-radius: 0 0 3px 3px; background: var(--orange);
}
.svc-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--green); color: #fff; margin-bottom: 24px;
}
.svc-card:nth-child(2) .svc-icon { background: var(--orange); }
.svc-icon svg { width: 26px; height: 26px; }
.svc-card h3 { font-size: 21px; font-weight: 700; }
.svc-card > p { margin-top: 12px; color: var(--muted); }
.ticks { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 10px; border-top: 1px dashed var(--line); padding-top: 20px; }
.ticks li { position: relative; padding-left: 28px; font-size: 15px; color: var(--body); }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: .32em; width: 18px; height: 18px; border-radius: 50%;
  background: var(--green-50) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23548235' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center / 12px no-repeat;
}

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: s; position: relative; }
.steps::before { content: ""; position: absolute; left: 0; right: 0; top: 27px; height: 2px; background: repeating-linear-gradient(90deg, var(--green-100) 0 8px, transparent 8px 14px); }
.steps li { position: relative; }
.steps .num {
  position: relative; display: inline-grid; place-items: center; width: 56px; height: 56px; border-radius: 50%;
  background: #fff; border: 2px solid var(--green); color: var(--green); font-weight: 800; font-size: 17px; margin-bottom: 22px;
}
.steps li:last-child .num { border-color: var(--orange); color: var(--orange-600); }
.steps h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.steps p { color: var(--muted); font-size: 15.5px; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 72px; align-items: start; }
.about-copy h2 { font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; margin-bottom: 24px; }
.about-copy > p { font-size: 17px; margin-bottom: 16px; }
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; padding-top: 32px; border-top: 1px solid var(--line); }
.values h4 { font-size: 16px; margin-bottom: 6px; font-weight: 700; }
.values h4::before { content: ""; display: block; width: 26px; height: 3px; background: var(--orange); border-radius: 3px; margin-bottom: 14px; }
.values p { font-size: 14.5px; color: var(--muted); }
.offices { display: grid; gap: 16px; position: relative; }
.office { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; background: #fff; transition: border-color .2s ease, transform .2s ease; }
.office:hover { border-color: var(--green-100); transform: translateX(4px); }
.office.hq { background: var(--green-900); border-color: var(--green-900); color: #D5E4C7; position: relative; overflow: hidden; }
.office.hq::after {
  content: ""; position: absolute; right: -60px; top: -40px; width: 220px; height: 120px; border-radius: 50%;
  border: 10px solid var(--orange); opacity: .5; transform: rotate(-28deg);
}
.office.hq h3 { color: #fff; }
.office .tag { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--green); background: var(--green-50); padding: 5px 10px; border-radius: 999px; margin-bottom: 14px; }
.office.hq .tag { background: var(--orange); color: #fff; }
.office h3 { font-size: 22px; margin-bottom: 6px; }
.office p { font-size: 15px; color: var(--muted); }
.office.hq p { color: #C4D6B3; }

/* Testimonials */
.section-dark { background: var(--green-950); position: relative; overflow: hidden; }
.section-dark::before {
  content: ""; position: absolute; width: 900px; height: 420px; right: -260px; top: -140px; border-radius: 50%;
  border: 2px solid rgba(247, 144, 30, .25); transform: rotate(-24deg);
}
.section-dark h2 { color: #fff; }
.section-dark .sub { color: #9DB28C; }
.quotes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; position: relative; }
.quote {
  margin: 0; padding: 36px 36px 30px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .09);
  display: flex; flex-direction: column; justify-content: space-between; gap: 28px;
  transition: background .25s ease, border-color .25s ease;
}
.quote:hover { background: rgba(255, 255, 255, .07); border-color: rgba(247, 144, 30, .35); }
.quote blockquote { margin: 0; font-size: 18px; line-height: 1.65; color: #E9F0E3; position: relative; padding-top: 36px; }
.quote blockquote::before {
  content: "“"; position: absolute; top: -18px; left: -4px; font-size: 72px; line-height: 1; color: var(--orange); font-family: Georgia, serif;
}
.quote figcaption { display: flex; align-items: center; gap: 14px; }
.avatar { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--green); color: #fff; font-weight: 700; flex: none; }
.quote:nth-child(even) .avatar { background: var(--orange); }
.quote figcaption b { display: block; color: #fff; font-size: 15.5px; }
.quote figcaption small { color: #9DB28C; font-size: 13.5px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.contact-info h2 { font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; }
.contact-info .sub { margin-top: 18px; color: var(--muted); font-size: 17px; }
.details { margin: 36px 0 0; display: grid; gap: 0; }
.details > div { display: grid; grid-template-columns: 210px 1fr; gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.details > div:last-child { border-bottom: 1px solid var(--line); }
.details dt { font-size: 13px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; padding-top: 2px; }
.details dd { margin: 0; color: var(--ink); font-weight: 500; }
.contact-form { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 22px; padding: 36px; display: grid; gap: 18px; }
.contact-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 8px; font-size: 14px; font-weight: 600; color: var(--ink); }
.contact-form input, .contact-form select, .contact-form textarea {
  font: 500 15px/1.4 var(--font); color: var(--ink); background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 13px 14px; width: 100%;
  transition: border-color .2s ease, box-shadow .2s ease; resize: vertical;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 4px rgba(84, 130, 53, .14); }
.contact-form .invalid { border-color: #D9534F; }
.form-note { font-size: 14px; min-height: 1.2em; color: var(--green-700); text-align: center; }
.form-note.err { color: #C0392B; }

/* Footer */
.site-footer { background: var(--green-950); color: #A9BB9B; padding: 72px 0 28px; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.4fr; gap: 40px; }
.footer-grid > div { display: flex; flex-direction: column; gap: 10px; }
.footer-grid img { width: 72px; height: auto; margin-bottom: 8px; }
.footer-grid h4 { color: #fff; font-size: 14px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 6px; }
.footer-grid a { color: #A9BB9B; }
.footer-grid a:hover { color: var(--orange); }
.f-name { color: #fff; font-weight: 700; font-size: 16px; }
.f-small { max-width: 280px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 56px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .08); font-size: 13px; color: #7F9370; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

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

/* Responsive */
@media (max-width: 1080px) {
  .nav-links { gap: 22px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 460px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 900px) {
  .menu-toggle { display: inline-block; }
  .nav-cta { display: none; }
  .nav-links {
    position: fixed; top: 76px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 8px 24px 20px;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease;
    box-shadow: 0 20px 30px -20px rgba(22, 33, 26, .25);
  }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav-links a::after { display: none; }
  .menu-open .nav-links { opacity: 1; transform: none; pointer-events: auto; }
  .cards-3, .quotes { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .steps::before { display: none; }
  .strip-inner { grid-template-columns: 1fr 1fr; }
  .strip-inner > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .strip-inner > div { padding: 20px 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .values { grid-template-columns: 1fr; }
  .section { padding: 84px 0; }
}
@media (max-width: 560px) {
  .container { padding: 0 16px; }
  .nav { gap: 10px; }
  .brand { gap: 8px; min-width: 0; }
  .brand-text strong { font-size: 13.5px; }
  .brand-text small { font-size: 11px; }
  .brand img { width: 40px; }
  .nav-actions { gap: 8px; }
  .lang-toggle { padding: 7px 10px; font-size: 12px; }
  .hero { padding: 40px 0 64px; }
  .lead { font-size: 17px; }
  .hero-meta { grid-template-columns: 1fr 1fr; gap: 20px; }
  .hero-meta b { font-size: 24px; }
  .hero h1 .hl { white-space: normal; }
  .chip { font-size: 11.5px; padding: 6px 10px 6px 22px; }
  .chip::before { left: 9px; width: 7px; height: 7px; margin-top: -3.5px; }
  .steps { grid-template-columns: 1fr; }
  .strip-inner { grid-template-columns: 1fr 1fr; column-gap: 16px; }
  .strip-inner > div { border-left: 0; padding: 16px 0; }
  .strip-inner > div:nth-child(n+3) { border-top: 1px solid rgba(255, 255, 255, .08); }
  .strip .v { font-size: 15px; }
  .details > div { grid-template-columns: 1fr; gap: 4px; }
  .contact-form { padding: 24px 18px; }
  .contact-form .row { grid-template-columns: 1fr; }
  .quote { padding: 28px 22px 24px; }
  .quote blockquote { font-size: 16.5px; }
  .footer-grid { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 40px; }
}