:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --text: #1a2233;
  --muted: #5b6577;
  --accent: #0f4c81;
  --accent-dark: #0a3660;
  --border: #e3e8ef;
  --max: 1040px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 700; font-size: 18px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text); text-decoration: none;
}
.brand svg { width: 34px; height: 34px; flex: none; }
.brand span { color: var(--accent); }
nav a { margin-left: 24px; text-decoration: none; color: var(--muted); font-size: 15px; }
nav a:hover { color: var(--accent); }
nav a.lang {
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px;
  color: var(--text); font-size: 14px;
}
nav a.lang:hover { border-color: var(--accent); }

.hero { padding: 88px 0 72px; background: linear-gradient(180deg, var(--bg-alt), var(--bg)); }
.hero h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.15; margin: 0 0 16px; }
.hero p.lead { font-size: 20px; color: var(--muted); max-width: 640px; margin: 0 0 12px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff; text-decoration: none;
  padding: 12px 22px; border-radius: 6px; font-weight: 600;
}
.btn:hover { background: var(--accent-dark); }

section { padding: 64px 0; }
section + section { border-top: 1px solid var(--border); }
h2 { font-size: 28px; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 32px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 24px; }
.card { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 10px; padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.card li { margin: 4px 0; }

.about p { max-width: 720px; }
.langs { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 16px; }
.pill { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; font-size: 14px; }

.contact dl { display: grid; grid-template-columns: max-content 1fr; gap: 10px 24px; margin: 0; }
.contact dt { font-weight: 600; }
.contact dd { margin: 0; color: var(--muted); }

footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

.why { padding: 0; border-top: 1px solid var(--border); background: var(--bg); }
.why .wrap { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; }
.why-item { display: flex; gap: 14px; align-items: flex-start; padding: 28px 24px 28px 0; }
.why-item + .why-item { padding-left: 24px; border-left: 1px solid var(--border); }
.why-item svg { width: 28px; height: 28px; flex: none; color: var(--accent); margin-top: 2px; }
.why-item h3 { margin: 0 0 4px; font-size: 16px; }
.why-item p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
@media (max-width: 760px) {
  .why .wrap { grid-template-columns: 1fr; }
  .why-item { padding: 20px 0; }
  .why-item + .why-item { padding-left: 0; border-left: 0; border-top: 1px solid var(--border); }
}

.contact .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 48px; }
.contact .intro { grid-column: 1 / -1; }
.contact form { display: grid; gap: 16px; }
.contact .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.contact input, .contact textarea {
  font: inherit; font-size: 16px; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; width: 100%;
}
.contact input:focus, .contact textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.contact textarea { min-height: 140px; resize: vertical; }
.contact .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.contact button {
  font: inherit; font-weight: 600; font-size: 16px; color: #fff; background: var(--accent);
  border: 0; border-radius: 6px; padding: 12px 22px; cursor: pointer; justify-self: start;
}
.contact button:hover { background: var(--accent-dark); }
.contact button[disabled] { opacity: 0.6; cursor: default; }
.contact .status { margin: 0; font-size: 15px; min-height: 1.4em; }
.contact .status.ok { color: #0f6e56; }
.contact .status.err { color: #a32d2d; }
@media (max-width: 760px) {
  .contact .wrap { grid-template-columns: 1fr; gap: 32px; }
  .contact .row { grid-template-columns: 1fr; }
}