/* ===== Base Reset & Variables ===== */
:root {
  --color-bg-top: #F1F6FF;
  --color-bg-bottom: #FDF3FA;
  --color-ink: #1F2937;
  --color-muted: #94A3B8;
  --color-blue: #5C8DFF;
  --color-purple: #B655FF;
  --color-pink: #FF2E83;
  --color-orange: #FF7A00;
  --color-green: #22C55E;
  --color-line: #E8ECF7;
  --color-text: #475569;
  --color-text-light: #64748B;
  --max-width: 430px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  background: linear-gradient(to bottom, var(--color-bg-top), var(--color-bg-bottom));
  background-attachment: fixed;
}

/* ===== Layout ===== */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 40px;
}

/* ===== Top Bar ===== */
.top-bar {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 14px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(to bottom, var(--color-bg-top), rgba(241, 246, 255, 0.95));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.top-bar__back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--color-line);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.top-bar__back:active {
  opacity: 0.7;
}

.top-bar__back svg {
  width: 14px;
  height: 14px;
  fill: var(--color-ink);
}

.top-bar__title {
  flex: 1;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.top-bar__spacer {
  width: 34px;
}

/* ===== Content Sections ===== */
.section-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--color-ink);
  margin-top: 24px;
  margin-bottom: 8px;
}

.sub-section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  margin-top: 14px;
  margin-bottom: 4px;
}

.paragraph {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
  margin-top: 8px;
  white-space: pre-line;
}

.bullet-list {
  list-style: none;
  padding-left: 8px;
  margin-top: 4px;
}

.bullet-list li {
  position: relative;
  padding-left: 16px;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text);
}

.bullet-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--color-text);
}

/* ===== Info Table ===== */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 13px;
}

.info-table th,
.info-table td {
  border: 1px solid var(--color-line);
  padding: 8px 6px;
  text-align: left;
  line-height: 1.5;
}

.info-table th {
  background: rgba(92, 141, 255, 0.08);
  font-weight: 700;
  color: var(--color-ink);
  white-space: nowrap;
}

.info-table td {
  color: var(--color-text);
  vertical-align: top;
}

/* ===== Footer ===== */
.footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
  text-align: center;
  font-size: 12px;
  color: var(--color-muted);
}