:root {
  --bg: #0b1020;
  --card: #121a30;
  --text: #e8ecff;
  --muted: #a7b3d9;
  --accent: #6ea8fe;
  --border: #2a355c;
  --chip: #1a2340;
}

:root[data-theme="light"] {
  --bg: #f5f7ff;
  --card: #ffffff;
  --text: #15213f;
  --muted: #4a587f;
  --accent: #2f6df6;
  --border: #d8e0ff;
  --chip: #eef3ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  z-index: 100;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--chip);
}

.theme-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 8px 10px;
  cursor: pointer;
  min-width: 38px;
  font-size: 16px;
}

.theme-btn.active {
  background: var(--accent);
  color: #fff;
}

.lang-select {
  border: 1px solid var(--border);
  background: var(--chip);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 14px;
}

.hero,
.section {
  margin: 28px 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}

.hero h1 {
  margin-top: 0;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  transition: 120ms ease-in-out;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.btn.primary:hover,
.nav-links a.btn.primary:hover {
  color: #fff;
  background: color-mix(in srgb, var(--accent) 88%, #ffffff 12%);
}

.nav-download {
  padding: 8px 14px;
}

.placeholder {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 14px;
  color: var(--muted);
  margin-top: 10px;
}

h1,
h2,
h3 {
  line-height: 1.3;
}

.muted {
  color: var(--muted);
}

code {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border-radius: 6px;
  padding: 2px 6px;
}

footer {
  margin-top: 42px;
  padding: 24px 0 44px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--muted);
}

ul li {
  margin-bottom: 6px;
}

/* Legal pages: continuous article style */
.legal-page main {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.legal-page .legal-container {
  max-width: 840px;
  width: 92vw;
  margin: 34px auto 60px;
  padding-left: 4px;
  padding-right: 4px;
}

.legal-page h1 {
  margin: 0;
  font-size: 42px;
}

.legal-page h2 {
  margin-top: 30px;
  margin-bottom: 10px;
  font-size: 28px;
}

.legal-page p,
.legal-page li {
  font-size: 20px;
}

.legal-page section {
  margin-top: 16px;
  scroll-margin-top: 88px;
}

.toc-box {
  margin: 22px 0 28px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: color-mix(in srgb, var(--card) 80%, transparent);
}

.toc-box ol {
  margin: 8px 0 0 22px;
  padding: 0;
}

.toc-box a {
  color: var(--text);
}

.toc-list {
  list-style: none;
  margin: 8px 0 0 0;
  padding: 0;
}

.toc-list li {
  margin-bottom: 6px;
}

/* ===== Pricing page ===== */
#pricing-page {
  min-height: 100vh;
  background: #f5f7fa;
}

:root:not([data-theme="light"]) #pricing-page {
  background: #0d1117;
}

.pr-wrapper {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 40px;
}

.pr-header {
  text-align: center;
  margin-bottom: 36px;
}

.pr-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
}

.pr-title {
  font-size: 32px;
  margin: 12px 0 8px;
}

.pr-subtitle {
  font-size: 15px;
  margin: 0;
}

.pr-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.pr-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.pr-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.pr-card-highlight {
  border-color: var(--accent);
}

.pr-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 10px;
}

.pr-card-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.pr-card-price {
  margin-bottom: 4px;
}

.pr-amount {
  font-size: 36px;
  font-weight: 700;
}

.pr-unit {
  font-size: 15px;
}

.pr-save {
  font-size: 13px;
  margin-bottom: 8px;
}

.pr-features {
  list-style: none;
  padding: 0;
  margin: 16px 0 24px;
  flex: 1;
}

.pr-features li {
  font-size: 14px;
  padding: 4px 0;
  color: var(--text);
}

.pr-btn {
  width: 100%;
  text-align: center;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.pr-footer {
  text-align: center;
  font-size: 13px;
  margin: 0;
}

@media (max-width: 560px) {
  .pr-cards {
    grid-template-columns: 1fr;
  }
}

[hidden] {
  display: none !important;
}

/* ===== Success card ===== */
.success-card {
  text-align: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 32px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: #22c55e;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: #fff;
  line-height: 1;
}

.success-title {
  font-size: 24px;
  margin: 0 0 12px;
}

.success-desc {
  font-size: 16px;
  color: var(--text);
  margin: 0 0 8px;
}

.success-hint {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}