:root {
  --primary: #d4145a;
  --primary-dark: #8b0a3a;
  --secondary: #3d1e6d;
  --background: #f4f4f8;
  --surface: #ffffff;
  --text: #14121c;
  --text-secondary: #6e6a7a;
  --divider: #e4e2ea;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 16px;
}

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

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

.site-header {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 1.25rem 1.5rem;
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.lang-switch {
  display: flex;
  gap: 0.75rem;
  font-size: 0.875rem;
}

.lang-switch a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
}

.lang-switch a.active,
.lang-switch a:hover {
  color: #fff;
  text-decoration: underline;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 8px 24px rgba(20, 18, 28, 0.06);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.125rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.meta {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 2rem;
}

h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.125rem;
}

p,
ul {
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.35rem;
}

.footer-nav {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--divider);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9375rem;
}

.notice {
  background: #fff8e6;
  border: 1px solid #f0d58c;
  border-radius: 12px;
  padding: 1rem 1.125rem;
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

.support-form {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.support-form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.support-form input,
.support-form select,
.support-form textarea {
  width: 100%;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--divider);
  border-radius: 12px;
  font: inherit;
  color: var(--text);
  background: var(--surface);
}

.support-form textarea {
  min-height: 8rem;
  resize: vertical;
}

.support-form input:focus,
.support-form select:focus,
.support-form textarea:focus {
  outline: 2px solid rgba(212, 20, 90, 0.25);
  border-color: var(--primary);
}

.support-form .hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.support-form button[type="submit"] {
  border: none;
  border-radius: 12px;
  padding: 0.875rem 1rem;
  font: inherit;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  cursor: pointer;
}

.support-form button[type="submit"]:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.form-status {
  border-radius: 12px;
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  margin-top: 0.5rem;
}

.form-status.success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.form-status.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

@media (max-width: 640px) {
  .card {
    padding: 1.25rem;
    border-radius: 14px;
  }

  .page {
    padding-top: 1.25rem;
  }
}