:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #eaf1ff;
  --blue-line: #d6e2fb;
  --teal: #14b8a6;
  --teal-soft: #d7f5ef;
  --amber: #f59e0b;
  --amber-soft: #ffeccc;
  --coral: #f97366;
  --coral-soft: #fde4e1;
  --navy: #0f172a;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --radius: 16px;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }

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

.icon { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--navy); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand:hover { color: var(--navy); }
.brand img { width: 32px; height: 32px; }
.brand span { color: var(--muted); font-weight: 500; font-size: 14px; padding-left: 10px; border-left: 1px solid var(--border); }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a { color: var(--text); padding: 8px 14px; border-radius: 10px; font-size: 15px; font-weight: 500; white-space: nowrap; }
.nav a:hover { background: var(--bg-soft); color: var(--blue); }
.nav a[aria-current="page"] { color: var(--blue); background: var(--blue-soft); }
.header-cta { margin-left: 8px; }

@media (max-width: 860px) {
  .site-header .header-cta { display: none; }
}
@media (max-width: 640px) {
  .site-header .wrap { height: auto; flex-wrap: wrap; padding-top: 12px; padding-bottom: 8px; gap: 8px; }
  .brand span { display: none; }
  .nav { margin-left: 0; width: 100%; overflow-x: auto; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { padding: 6px 12px; font-size: 14px; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  transition: background .15s, color .15s, transform .15s;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: var(--blue-soft); color: var(--blue); }
.btn-ghost:hover { background: var(--blue-line); color: var(--blue-dark); }
.btn-white { background: #fff; color: var(--blue); }
.btn-white:hover { background: var(--blue-soft); color: var(--blue-dark); }
.btn-sm { padding: 9px 16px; font-size: 14px; border-radius: 10px; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 72px 0 88px; background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%); overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--teal); }
.hero h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 12px; color: var(--navy); }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero .h1-zh { font-size: clamp(20px, 2.6vw, 26px); font-weight: 600; color: var(--text); margin: 0 0 20px; }
.hero .lead { font-size: 17px; color: var(--muted); margin: 0 0 32px; max-width: 540px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }
.facts { display: flex; gap: 10px 24px; flex-wrap: wrap; margin-top: 36px; padding: 0; list-style: none; color: var(--muted); font-size: 14px; }
.facts li { display: flex; align-items: center; gap: 8px; }
.facts .icon { width: 18px; height: 18px; color: var(--teal); }
.hero-art img { width: 100%; max-width: 600px; margin-left: auto; }

@media (max-width: 900px) {
  .hero { padding: 48px 0 64px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .hero-art img { margin: 0 auto; max-width: 480px; }
}

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-soft); }
.section-head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.section-head .kicker { color: var(--blue); font-weight: 700; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 10px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 14px; color: var(--navy); }
.section-head p { color: var(--muted); margin: 0; font-size: 17px; }
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 36px; }
}

/* Service cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 1000px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--blue-line); }
.tile { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 20px; }
.tile .icon { width: 26px; height: 26px; }
.tile.blue { background: var(--blue-soft); color: var(--blue); }
.tile.teal { background: var(--teal-soft); color: #0d9488; }
.tile.amber { background: var(--amber-soft); color: #d97706; }
.tile.coral { background: var(--coral-soft); color: #e2533f; }
.card h3 { font-size: 18px; margin: 0; color: var(--navy); }
.card .zh { color: var(--muted); font-size: 14px; font-weight: 500; margin: 2px 0 12px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.65; }

/* About split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split h2 { font-size: clamp(28px, 3.6vw, 38px); line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 20px; color: var(--navy); }
.split p { color: var(--muted); margin: 0 0 16px; }
.split .kicker { color: var(--blue); font-weight: 700; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 10px; }
.checks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; }
.checks .dot { width: 24px; height: 24px; border-radius: 50%; background: var(--teal-soft); color: #0d9488; display: grid; place-items: center; flex: none; margin-top: 2px; }
.checks .dot .icon { width: 14px; height: 14px; stroke-width: 3; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split .art { order: -1; max-width: 460px; margin: 0 auto; }
}

/* Process */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding: 28px 24px; border-radius: var(--radius); background: #fff; border: 1px solid var(--border); }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--blue-line);
  margin-bottom: 16px;
}
.step h3 { margin: 0 0 8px; font-size: 18px; color: var(--navy); }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* Company info */
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 760px) { .info-grid { grid-template-columns: 1fr; } }
.info-item { display: flex; gap: 16px; padding: 24px; border-radius: var(--radius); background: #fff; border: 1px solid var(--border); }
.info-item.wide { grid-column: 1 / -1; }
.info-item .tile { margin: 0; width: 46px; height: 46px; border-radius: 12px; }
.info-item .tile .icon { width: 22px; height: 22px; }
.info-item h3 { margin: 0 0 4px; font-size: 14px; font-weight: 600; color: var(--muted); }
.info-item p { margin: 0; color: var(--navy); font-weight: 500; word-break: break-word; }
.info-item p + p { margin-top: 2px; color: var(--muted); font-weight: 400; font-size: 15px; }

/* CTA band */
.cta { padding: 96px 0; }
.cta-box {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: var(--blue);
  color: #fff;
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-box::before, .cta-box::after { content: ""; position: absolute; border-radius: 50%; }
.cta-box::before { width: 280px; height: 280px; right: -60px; top: -120px; background: rgba(255, 255, 255, 0.08); }
.cta-box::after { width: 160px; height: 160px; right: 180px; bottom: -90px; background: rgba(20, 184, 166, 0.35); }
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 { margin: 0 0 8px; font-size: clamp(24px, 3vw, 32px); letter-spacing: -0.02em; line-height: 1.25; }
.cta-box p { margin: 0; color: rgba(255, 255, 255, 0.82); }
@media (max-width: 640px) { .cta-box { padding: 36px 24px; } .cta { padding: 64px 0; } }

/* ---------- Sub-page hero ---------- */
.page-hero { position: relative; overflow: hidden; background: var(--blue-soft); padding: 64px 0 56px; }
.page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; }
.page-hero::before { width: 320px; height: 320px; right: -80px; top: -140px; background: var(--blue-line); }
.page-hero::after { width: 120px; height: 120px; right: 220px; bottom: -60px; background: var(--teal-soft); }
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero .kicker { color: var(--blue); font-weight: 700; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 10px; }
.page-hero h1 { margin: 0 0 8px; font-size: clamp(32px, 4.5vw, 46px); letter-spacing: -0.025em; line-height: 1.15; color: var(--navy); }
.page-hero p { margin: 0; color: var(--muted); font-size: 17px; max-width: 620px; }

/* Contact channel cards */
.channels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: -32px; position: relative; z-index: 2; }
@media (max-width: 860px) { .channels { grid-template-columns: 1fr; margin-top: 32px; } }
.channel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; }
.channel h3 { margin: 0 0 4px; font-size: 17px; color: var(--navy); }
.channel .sub { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.channel a, .channel strong { font-weight: 600; font-size: 16px; word-break: break-all; }

/* Long-form documents */
.doc-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 56px; padding: 56px 0 96px; }
@media (max-width: 900px) { .doc-layout { grid-template-columns: 1fr; gap: 24px; padding-top: 40px; } }
.toc { position: sticky; top: 96px; align-self: start; font-size: 14px; }
.toc p { font-weight: 700; color: var(--navy); margin: 0 0 8px; }
.toc a { display: block; color: var(--muted); padding: 6px 12px; border-left: 2px solid var(--border); }
.toc a:hover { color: var(--blue); border-color: var(--blue); }
@media (max-width: 900px) {
  .toc { position: static; display: flex; gap: 8px; flex-wrap: wrap; }
  .toc p { display: none; }
  .toc a { border: 1px solid var(--border); border-radius: 999px; padding: 4px 14px; }
}
.doc { max-width: 760px; }
.doc .meta { display: inline-block; background: var(--bg-soft); border-radius: 8px; padding: 6px 12px; color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.doc h2 { font-size: 22px; margin: 44px 0 12px; color: var(--navy); letter-spacing: -0.01em; scroll-margin-top: 96px; }
.doc h2:first-of-type { margin-top: 24px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc li::marker { color: var(--blue); }
.doc p { margin: 0 0 14px; }
.doc .lang-title { font-size: 28px; margin: 0 0 8px; color: var(--navy); letter-spacing: -0.02em; scroll-margin-top: 96px; }
.doc .divider { border: 0; border-top: 1px solid var(--border); margin: 64px 0; }

/* FAQ */
.faq { display: grid; gap: 14px; }
.faq details { border: 1px solid var(--border); border-radius: 14px; background: #fff; padding: 0 22px; }
.faq details[open] { border-color: var(--blue-line); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 0;
  font-weight: 600;
  color: var(--navy);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary small { display: block; color: var(--muted); font-weight: 500; font-size: 14px; }
.faq summary .plus { width: 28px; height: 28px; border-radius: 8px; background: var(--blue-soft); color: var(--blue); display: grid; place-items: center; flex: none; transition: transform .2s; }
.faq summary .plus .icon { width: 16px; height: 16px; }
.faq details[open] .plus { transform: rotate(45deg); }
.faq .answer { padding: 0 0 18px; color: var(--muted); }
.faq .answer p { margin: 0 0 8px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy); color: #94a3b8; font-size: 14px; padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer .brand span { color: #94a3b8; border-color: #334155; }
.site-footer h4 { color: #fff; font-size: 14px; margin: 0 0 14px; }
.site-footer p { margin: 0 0 6px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer a { color: #94a3b8; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #1e293b; margin-top: 48px; padding-top: 24px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }