:root {
  --text: #1d1d1f;
  --muted: #6e6e73;
  --bg: #ffffff;
  --alt: #f5f5f7;
  --line: #d2d2d7;
  --accent: #0a5cc2;
  --accent-hover: #084c9f;
  --radius: 24px;
  --max: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--text); background: var(--bg); font-size: 17px; line-height: 1.47; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
picture { display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
section { scroll-margin-top: 56px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }
.center { text-align: center; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.022em; }
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3 { letter-spacing: 0.01em; }
h2 { font-size: clamp(34px, 5.2vw, 56px); line-height: 1.08; }
.lead { font-size: clamp(19px, 2.2vw, 24px); line-height: 1.38; color: var(--muted); margin: 16px auto 0; max-width: 760px; font-weight: 400; }
.eyebrow { font-size: 17px; font-weight: 600; color: var(--muted); margin: 0 0 12px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.78); -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid rgba(0,0,0,.08); }
.nav .wrap { display: flex; align-items: center; height: 52px; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; letter-spacing: .14em; font-size: 14px; }
.brand:hover { text-decoration: none; }
.brand .zh { letter-spacing: .08em; font-weight: 500; color: var(--muted); }
.nav ul { list-style: none; display: flex; gap: 26px; margin: 0 0 0 auto; padding: 0; }
.nav ul a { color: var(--text); font-size: 13px; opacity: .85; }
.nav ul a:hover { opacity: 1; text-decoration: none; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.lang button { appearance: none; border: 0; background: transparent; font: inherit; font-size: 12px; padding: 4px 10px; border-radius: 999px; color: var(--muted); cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--text); color: #fff; }

/* buttons */
.actions { display: flex; gap: 22px; justify-content: center; align-items: center; margin-top: 30px; flex-wrap: wrap; }
.btn { display: inline-block; background: var(--accent); color: #fff; padding: 12px 24px; border-radius: 999px; font-size: 17px; font-weight: 500; }
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.more { font-size: 17px; }
.more::after { content: " ›"; }

/* hero */
.hero { position: relative; min-height: min(94vh, 960px); overflow: hidden; background: #dfe9f2; }
.hero picture, .hero picture img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero picture img { object-fit: cover; object-position: 60% 100%; }
.hero .copy { position: relative; text-align: center; padding: clamp(64px, 13vh, 140px) 22px 40px; }
.hero h1 { font-size: clamp(46px, 8vw, 96px); line-height: 1.02; }
.hero .lead { color: #3a3a3c; }

/* facts */
.facts { padding: 72px 0; border-bottom: 1px solid #ececf0; }
.facts .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.facts .num { font-size: clamp(36px, 4.6vw, 52px); font-weight: 700; letter-spacing: -0.02em; }
.facts .lbl { color: var(--muted); margin-top: 4px; }

/* blocks */
.block { padding: clamp(80px, 11vw, 140px) 0; }
.block.alt { background: var(--alt); }
.full { margin-top: clamp(40px, 6vw, 72px); }
.full img { width: 100%; height: auto; }
.rounded img, img.rounded { border-radius: var(--radius); }
details { margin: 18px auto 0; max-width: 760px; }
summary { list-style: none; cursor: pointer; color: var(--accent); font-size: 17px; display: inline-block; }
summary::-webkit-details-marker { display: none; }
summary::after { content: " ›"; display: inline-block; transition: transform .2s; }
details[open] summary::after { transform: rotate(90deg); }
details p { color: var(--muted); margin: 12px 0 0; }

/* services */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 56px; text-align: left; }
.card { background: var(--alt); border-radius: var(--radius); padding: 34px 28px 32px; }
.card svg { width: 40px; height: 40px; margin-bottom: 22px; }
.card h3 { font-size: 21px; letter-spacing: -0.01em; }
.card p { margin: 8px 0 0; color: var(--muted); }

/* split */
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.split h2 { font-size: clamp(32px, 4.4vw, 48px); }
.split .lead { margin-left: 0; }

/* products */
.module { margin: 56px auto 0; max-width: 980px; }
.pgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #e3e3e8; border-radius: var(--radius); overflow: hidden; margin-top: 56px; text-align: left; }
.pgrid div { background: #fff; padding: 30px 28px; }
.pgrid h3 { font-size: 19px; letter-spacing: -0.01em; }
.pgrid p { margin: 6px 0 0; color: var(--muted); font-size: 16px; }

/* process */
.steps { list-style: none; padding: 0; margin: 64px 0 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: s; text-align: left; }
.steps li { border-top: 2px solid var(--text); padding-top: 18px; counter-increment: s; }
.steps li::before { content: "0" counter(s); display: block; font-size: 13px; font-weight: 600; color: var(--accent); margin-bottom: 10px; letter-spacing: .08em; }
.steps h3 { font-size: 19px; }
.steps p { margin: 6px 0 0; color: var(--muted); font-size: 16px; }

/* global */
.bleed { display: block; margin-top: clamp(40px, 6vw, 72px); }
.bleed img { width: 100%; height: auto; max-height: 82vh; object-fit: cover; object-position: 50% 70%; }

/* contact */
.contact .mail { display: inline-block; font-size: clamp(28px, 4.4vw, 48px); font-weight: 600; letter-spacing: -0.01em; margin-top: 34px; }
.contact dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 900px; margin: 48px auto 0; text-align: center; }
.contact dt { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.contact dd { margin: 6px 0 0; font-size: 17px; }

/* footer */
footer { background: var(--alt); color: var(--muted); font-size: 12px; line-height: 1.6; padding: 26px 0 34px; }
footer .row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 16px; }

/* reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s ease, transform .9s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media print { .reveal { opacity: 1 !important; transform: none !important; } .nav { position: static; } }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

@media (max-width: 1000px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 34px; }
}
@media (max-width: 760px) {
  .nav ul li:not(.keep) { display: none; }
  .nav .wrap { gap: 14px; }
  .facts .grid { grid-template-columns: 1fr; gap: 30px; }
  .split { grid-template-columns: 1fr; }
  .pgrid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .contact dl { grid-template-columns: 1fr; }
  .hero { min-height: 640px; }
  .hero picture img { object-position: 78% 100%; }
}
@media (max-width: 520px) {
  .cards { grid-template-columns: 1fr; }
}

.flush-bottom { padding-bottom: 0 !important; }