:root {
  --bg: #eef2f0;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #152522;
  --muted: #5d6e69;
  --line: rgba(21, 37, 34, 0.08);
  --accent: #0f6c60;
  --accent-soft: rgba(15, 108, 96, 0.1);
  --shadow: 0 22px 58px rgba(18, 35, 32, 0.12);
  --radius-lg: 24px;
  --radius-md: 18px;
  --font-ui: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(217, 169, 94, 0.14), transparent 26%),
    linear-gradient(180deg, #f8f9f7 0%, #eef2f0 100%);
  color: var(--text);
  font-family: var(--font-ui);
}

body {
  padding: 18px;
}

.viewer-shell {
  max-width: 1460px;
  margin: 0 auto;
}

.viewer-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(7, 42, 46, 0.96), rgba(16, 92, 85, 0.94));
  color: #f4f8f7;
  box-shadow: var(--shadow);
}

.viewer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.viewer-logo {
  width: clamp(92px, 8vw, 110px);
  height: clamp(92px, 8vw, 110px);
  object-fit: contain;
  border-radius: 24px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.96);
}

.viewer-back {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}

.viewer-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.viewer-logout {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}

.viewer-header h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
}

.viewer-header__meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.viewer-header__meta span {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.viewer-main {
  margin-top: 20px;
}

.viewer-paper {
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.viewer-paper {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px;
}

.word-content {
  overflow: auto;
  background: var(--surface-strong);
  border-radius: var(--radius-md);
  padding: 30px;
}

.word-content img {
  max-width: 100%;
  height: auto;
}

.guide-brief {
  margin: 0 0 28px;
  padding: 22px 24px;
  border-radius: 20px;
  border: 1px solid rgba(15, 108, 96, 0.14);
  background:
    radial-gradient(circle at right top, rgba(217, 169, 94, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(244, 250, 248, 0.98), rgba(236, 245, 242, 0.96));
  box-shadow: 0 14px 30px rgba(18, 35, 32, 0.08);
}

.guide-brief__eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.guide-brief h2 {
  margin: 0 0 8px;
  font-size: 24px;
  line-height: 1.28;
}

.guide-brief > p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.guide-brief__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.guide-brief__card {
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid rgba(21, 37, 34, 0.08);
  background: rgba(255, 255, 255, 0.82);
}

.guide-brief__card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.35;
}

.guide-brief__card p,
.guide-brief__card li {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.guide-brief__card ul {
  margin: 0;
  padding-left: 18px;
}

.guide-brief__card li + li {
  margin-top: 6px;
}

.guide-brief__warn {
  margin-top: 16px;
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 0 16px 16px 0;
  background: rgba(15, 108, 96, 0.08);
  color: var(--text);
  line-height: 1.78;
}

.guide-brief__refs {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed rgba(21, 37, 34, 0.12);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.guide-brief__refs strong {
  color: var(--text);
}

.guide-brief__refs a {
  color: #0b6d83 !important;
  word-break: break-all;
}

.figure-note-inline {
  display: block;
  max-width: min(760px, 100%);
  margin: 12px auto 18px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(217, 169, 94, 0.28);
  background: linear-gradient(180deg, rgba(255, 250, 241, 0.98), rgba(250, 245, 232, 0.96));
  box-shadow: 0 10px 24px rgba(18, 35, 32, 0.06);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.78;
  text-align: left;
}

.figure-note-inline strong {
  color: var(--text);
}

.word-content a[href^="http"] {
  color: #0b6d83 !important;
  word-break: break-all;
}

.paper-watermark {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed rgba(21, 37, 34, 0.12);
  text-align: center;
  color: rgba(15, 108, 96, 0.22);
  letter-spacing: 0.2em;
  font-size: 12px;
}

@media (max-width: 980px) {
  .viewer-header {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 680px) {
  body {
    padding: 12px;
  }

  .viewer-header,
  .viewer-paper,
  .word-content {
    padding: 18px;
  }

  .guide-brief {
    padding: 18px;
  }

  .guide-brief__grid {
    grid-template-columns: 1fr;
  }

  .figure-note-inline {
    margin: 10px auto 16px;
    padding: 11px 12px;
  }
}