:root {
  --contact-bg: #fff8fb;
  --contact-panel: #ffffff;
  --contact-text: #201f24;
  --contact-muted: #6c6168;
  --contact-line: #eadde3;
  --contact-primary: #b63e62;
  --contact-primary-dark: #8f2147;
  --contact-soft: #fff1f5;
  color-scheme: light;
  color: var(--contact-text);
  background: var(--contact-bg);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  background: var(--contact-bg);
  color: var(--contact-text);
  line-height: 1.6;
}

a { color: var(--contact-primary-dark); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden { display: none !important; }

.contact-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px max(20px, calc((100vw - 960px) / 2));
  border-bottom: 1px solid var(--contact-line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
}

.contact-brand {
  display: inline-flex;
  align-items: center;
  color: #3b0710;
  font-size: 23px;
  font-weight: 850;
  line-height: 1.15;
  text-decoration: none;
}

.contact-brand img {
  width: 44px;
  height: 44px;
  display: block;
  margin-right: 10px;
  border-radius: 7px;
  object-fit: contain;
}

.contact-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-language-picker select {
  min-height: 38px;
  padding: 0 34px 0 12px;
  border: 1px solid var(--contact-line);
  border-radius: 6px;
  background: var(--contact-panel);
  color: var(--contact-text);
  font: inherit;
  font-size: 14px;
}

.contact-back {
  font-size: 14px;
  text-decoration: none;
}

.contact-shell {
  width: min(720px, calc(100% - 32px));
  flex: 1;
  margin: 48px auto 72px;
}

.contact-card {
  padding: 38px 42px;
  border: 1px solid var(--contact-line);
  border-radius: 10px;
  background: var(--contact-panel);
  box-shadow: 0 18px 48px rgba(83, 39, 58, 0.08);
}

.contact-eyebrow {
  margin: 0 0 7px;
  color: var(--contact-primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.contact-card h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 40px);
  line-height: 1.25;
}

.contact-intro {
  margin: 12px 0 28px;
  color: var(--contact-muted);
}

.contact-form,
.contact-form label {
  display: grid;
  gap: 8px;
}

.contact-form { gap: 20px; }

.contact-form label > span {
  font-size: 14px;
  font-weight: 750;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--contact-line);
  border-radius: 7px;
  background: var(--contact-panel);
  color: var(--contact-text);
  font: inherit;
}

.contact-form input {
  min-height: 46px;
  padding: 10px 12px;
}

.contact-form textarea {
  min-height: 220px;
  padding: 12px;
  resize: vertical;
}

.contact-form textarea::placeholder { color: #958890; }

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--contact-primary);
  outline: 3px solid rgba(182, 62, 98, 0.14);
}

.contact-honeypot {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.contact-security {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--contact-line);
  border-radius: 7px;
  background: var(--contact-soft);
}

.contact-security strong { font-size: 14px; }
.contact-security p { margin: 0; color: var(--contact-muted); font-size: 13px; }

.contact-submit {
  min-height: 46px;
  padding: 10px 22px;
  border: 0;
  border-radius: 7px;
  background: var(--contact-primary);
  color: #ffffff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.contact-submit:hover { background: var(--contact-primary-dark); }
.contact-submit:focus-visible { outline: 3px solid rgba(182, 62, 98, 0.24); outline-offset: 3px; }
.contact-submit:disabled { cursor: wait; opacity: 0.62; }

.contact-message {
  min-height: 24px;
  color: var(--contact-muted);
  font-size: 14px;
}

.contact-message.is-success { color: #18724f; }
.contact-message.is-error { color: #a61f40; }

.contact-mailbox {
  margin: 28px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--contact-line);
  color: var(--contact-muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.contact-footer {
  padding: 20px;
  border-top: 1px solid var(--contact-line);
  color: var(--contact-muted);
  text-align: center;
  font-size: 13px;
}

html[data-theme="dark"] {
  --contact-bg: #171319;
  --contact-panel: #211a22;
  --contact-text: #f7eef2;
  --contact-muted: #bcaeb8;
  --contact-line: #493944;
  --contact-primary: #ff9ab5;
  --contact-primary-dark: #ffb4c8;
  --contact-soft: #2c2028;
  color-scheme: dark;
}

html[data-theme="dark"] .contact-topbar { background: rgba(33, 26, 34, 0.96); }
html[data-theme="dark"] .contact-brand { color: #ffd8e0; }
html[data-theme="dark"] .contact-form textarea::placeholder { color: #8f818a; }
html[data-theme="dark"] .contact-message.is-success { color: #77d8ad; }
html[data-theme="dark"] .contact-message.is-error { color: #ff9ab5; }

@media (max-width: 640px) {
  .contact-topbar { flex-wrap: wrap; padding: 10px 14px; }
  .contact-actions { width: 100%; }
  .contact-back { margin-left: auto; }
  .contact-shell { margin: 22px auto 48px; }
  .contact-card { padding: 26px 20px; }
}