:root {
  color-scheme: light;
  --ink: #13213a;
  --muted: #61718a;
  --line: #d9e3f0;
  --primary: #2463eb;
  --primary-soft: #eef4ff;
  --surface: #ffffff;
  --page: #f4f7fb;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.85;
}

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

.legal-nav-wrap {
  position: relative;
  min-height: 52px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.legal-back {
  position: absolute;
  top: 50%;
  left: 24px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  transform: translateY(-50%);
  border: 1px solid #bdcbe0;
  border-radius: 6px;
  background: #ffffff;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
}

.legal-back:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.legal-nav {
  width: min(1080px, calc(100% - 220px));
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 26px;
  overflow-x: auto;
  scrollbar-width: none;
}

.legal-nav::-webkit-scrollbar {
  display: none;
}

.legal-nav a {
  flex: 0 0 auto;
  padding: 13px 0 11px;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.legal-nav a[aria-current="page"] {
  border-bottom-color: var(--primary);
  color: var(--primary);
}

.legal-main {
  width: min(920px, calc(100% - 40px));
  margin: 48px auto 64px;
}

.legal-intro {
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.legal-eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.legal-intro h1 {
  margin: 0;
  font-size: clamp(32px, 6vw, 46px);
  line-height: 1.2;
  letter-spacing: 0;
}

.legal-lead {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.legal-date {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.legal-document {
  background: transparent;
}

.legal-section {
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.legal-section h2 {
  margin: 0 0 14px;
  font-size: 22px;
  line-height: 1.45;
  letter-spacing: 0;
}

.legal-section h3 {
  margin: 22px 0 8px;
  font-size: 17px;
  letter-spacing: 0;
}

.legal-section p {
  margin: 10px 0;
}

.legal-section ul,
.legal-section ol {
  margin: 10px 0;
  padding-left: 24px;
}

.legal-section li + li {
  margin-top: 8px;
}

.legal-note {
  margin: 20px 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  color: #274060;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.contact-item {
  min-width: 0;
  padding: 18px;
  background: var(--surface);
}

.contact-item strong,
.contact-item span {
  display: block;
}

.contact-item span {
  margin-top: 4px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.feedback-form {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.feedback-form label {
  display: grid;
  gap: 7px;
  color: #33445f;
  font-size: 14px;
  font-weight: 700;
}

.feedback-form input,
.feedback-form select,
.feedback-form textarea {
  width: 100%;
  border: 1px solid #bdcbe0;
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  outline: none;
}

.feedback-form input,
.feedback-form select {
  min-height: 48px;
  padding: 0 13px;
}

.feedback-form textarea {
  min-height: 160px;
  padding: 12px 13px;
  resize: vertical;
}

.feedback-form input:focus,
.feedback-form select:focus,
.feedback-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36, 99, 235, 0.12);
}

.feedback-submit {
  width: fit-content;
  min-height: 46px;
  padding: 0 24px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: #ffffff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.feedback-submit:disabled {
  cursor: wait;
  opacity: 0.65;
}

.feedback-status {
  min-height: 24px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.feedback-status[data-tone="success"] {
  color: #087f5b;
}

.feedback-status[data-tone="error"] {
  color: #c92a2a;
}

.form-trap {
  position: absolute;
  left: -10000px;
}

.legal-footer {
  padding: 30px 20px;
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.legal-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  margin-bottom: 10px;
}

.legal-footer a {
  color: inherit;
  text-decoration: none;
}

.legal-footer a:hover {
  color: var(--primary);
  text-decoration: underline;
}

@media (max-width: 640px) {
  .legal-main {
    width: min(100% - 28px, 920px);
  }

  .legal-nav-wrap {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 8px;
    padding-left: 14px;
  }

  .legal-back {
    position: static;
    min-height: 32px;
    padding: 0 10px;
    transform: none;
  }

  .legal-nav {
    width: 100%;
    margin: 0;
    justify-content: flex-start;
    gap: 22px;
  }

  .legal-main {
    margin-top: 32px;
  }

  .legal-intro h1 {
    font-size: 34px;
  }

  .legal-section {
    padding: 25px 0;
  }

  .contact-list,
  .form-grid {
    grid-template-columns: 1fr;
  }
}