/* =============================================================
 * Theme · Perplex (08 · Aravind Srinivas · Perplexity)
 * 配色：奶白 + 求知青绿 + 深墨蓝 + 柠檬黄高亮
 * ============================================================= */

:root {
  --pp-bg: #fafbfc;
  --pp-panel: #ffffff;
  --pp-panel-2: #f3f5f7;
  --pp-teal: #20b2aa;
  --pp-teal-deep: #178c85;
  --pp-deep: #1a3a52;
  --pp-deep-soft: #2d5778;
  --pp-amber: #fde047;
  --pp-amber-deep: #ca8a04;
  --pp-ink: #1f2937;
  --pp-ink-soft: #4b5563;
  --pp-ink-dim: #6b7280;
  --pp-ink-faint: #9ca3af;
  --pp-border: rgba(31, 41, 55, 0.12);
  --pp-border-soft: rgba(31, 41, 55, 0.06);
  --pp-glow: rgba(32, 178, 170, 0.30);
}

/* ============== 全局 ============== */
.theme-perplex {
  background: var(--pp-bg);
  color: var(--pp-ink);
  font-family: 'Inter', 'Noto Serif SC', -apple-system, sans-serif;
}
.theme-perplex .topnav {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--pp-border);
  backdrop-filter: blur(8px);
}
.theme-perplex .topnav .back-link { color: var(--pp-ink); }
.theme-perplex .topnav .back-link:hover { color: var(--pp-teal); }
.theme-perplex .topnav-capsule {
  background: rgba(32, 178, 170, 0.08);
  border-color: rgba(32, 178, 170, 0.25);
  color: var(--pp-deep);
}
.theme-perplex .progress-bar {
  background: linear-gradient(90deg, var(--pp-teal), var(--pp-deep));
}

/* ============== Hero ============== */
.hero-perplex {
  position: relative;
  padding: 96px 32px 56px;
  background:
    radial-gradient(60% 80% at 80% 0%, rgba(32, 178, 170, 0.12) 0%, transparent 60%),
    radial-gradient(50% 70% at 0% 100%, rgba(26, 58, 82, 0.08) 0%, transparent 60%),
    var(--pp-bg);
  overflow: hidden;
}
.hero-perplex .hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(31, 41, 55, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 41, 55, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 80%);
  pointer-events: none;
}
.hero-perplex .hero-spotlight {
  position: absolute;
  top: -60px; right: -40px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(32, 178, 170, 0.18) 0%, transparent 65%);
  filter: blur(20px);
  pointer-events: none;
}
.hero-perplex .hero-content {
  position: relative; z-index: 1;
  max-width: 820px; margin: 0 auto;
}
.hero-perplex .hero-tag {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px;
  background: rgba(32, 178, 170, 0.10);
  border: 1px solid rgba(32, 178, 170, 0.30);
  border-radius: 999px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--pp-teal-deep);
  letter-spacing: 0.04em;
  margin-bottom: 22px;
}
.hero-perplex .hero-tag .tag-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--pp-teal);
  box-shadow: 0 0 10px var(--pp-glow);
}
.hero-perplex .hero-title {
  display: flex; flex-direction: column; gap: 6px;
  margin: 0 0 24px;
  font-family: 'Noto Serif SC', serif;
}
.hero-perplex .title-eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 500;
  color: var(--pp-teal);
  letter-spacing: 0.01em;
}
.hero-perplex .title-line {
  font-size: 30px;
  font-weight: 700;
  color: var(--pp-ink);
  line-height: 1.3;
}
.hero-perplex .title-line-emphasis {
  font-size: 60px;
  font-weight: 900;
  line-height: 1.05;
  background: linear-gradient(135deg, var(--pp-deep) 0%, var(--pp-teal) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-top: 8px;
}
.hero-perplex .hero-deck {
  font-size: 16px;
  line-height: 1.85;
  color: var(--pp-ink-soft);
  max-width: 680px;
  margin: 22px auto 28px;
  text-align: center;
}
.hero-perplex .hero-deck em {
  font-style: normal;
  color: var(--pp-ink);
  background: rgba(32, 178, 170, 0.15);
  padding: 1px 6px;
  border-radius: 3px;
}
.hero-perplex .hero-deck strong {
  color: var(--pp-ink);
  font-weight: 700;
  background: linear-gradient(180deg, transparent 80%, var(--pp-amber) 80%);
  padding: 0 3px;
}
.hero-perplex .hero-meta {
  display: flex; gap: 16px; align-items: center;
  justify-content: space-around;
  padding: 22px 0;
  margin-top: 28px;
  border-top: 1px solid rgba(32, 178, 170, 0.30);
  border-bottom: 1px solid rgba(32, 178, 170, 0.30);
}
.hero-perplex .hm-item {
  display: flex; flex-direction: column; gap: 4px;
  text-align: center;
  flex: 1;
}
.hero-perplex .hm-num {
  font-family: 'Inter', sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: var(--pp-deep);
}
.hero-perplex .hm-num sup {
  font-size: 16px;
  color: var(--pp-teal);
}
.hero-perplex .hm-unit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--pp-ink-dim);
  letter-spacing: 0.08em;
}
.hero-perplex .hm-label {
  font-size: 13px;
  color: var(--pp-ink-soft);
}
.hero-perplex .hm-divider {
  width: 1px;
  height: 36px;
  background: rgba(32, 178, 170, 0.30);
}

/* Portrait — 宝丽来横向相框风格（对齐 03） */
.portrait-perplex {
  display: flex; flex-direction: column; align-items: center;
  margin: 48px auto 24px;
  max-width: 540px;
}
.portrait-frame-perplex {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  padding: 14px 14px 0;
  background: linear-gradient(135deg, var(--pp-teal) 0%, var(--pp-deep) 100%);
  border-radius: 6px;
  box-shadow:
    0 2px 0 rgba(0, 0, 0, 0.15),
    0 14px 36px rgba(0, 0, 0, 0.25),
    0 0 0 1px rgba(32, 178, 170, 0.12),
    0 0 60px rgba(32, 178, 170, 0.08);
  transform: rotate(-1.5deg);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  overflow: visible;
  width: 100%;
}
.portrait-frame-perplex:hover {
  transform: rotate(0deg) scale(1.02);
}
/* 左上角胶带 —— Perplexity 蓝绿 */
.portrait-frame-perplex::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 30px;
  width: 80px;
  height: 22px;
  background: rgba(32, 178, 170, 0.55);
  border-left: 1px dashed rgba(0, 0, 0, 0.18);
  border-right: 1px dashed rgba(0, 0, 0, 0.18);
  transform: rotate(-4deg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35), 0 0 14px rgba(32, 178, 170, 0.35);
  z-index: 3;
}
/* 右上角胶带 —— Perplexity 深蓝 */
.portrait-frame-perplex::after {
  content: '';
  position: absolute;
  top: -8px;
  right: 36px;
  width: 70px;
  height: 22px;
  background: rgba(26, 58, 82, 0.55);
  border-left: 1px dashed rgba(0, 0, 0, 0.18);
  border-right: 1px dashed rgba(0, 0, 0, 0.18);
  transform: rotate(5deg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35), 0 0 14px rgba(26, 58, 82, 0.35);
  z-index: 3;
}
.portrait-frame-perplex .portrait-photo {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 3px;
  display: block;
}
.portrait-meta-perplex {
  display: flex; flex-direction: column; gap: 2px;
  padding: 12px 4px 14px;
  text-align: center;
  width: 100%;
}
.portrait-meta-perplex .portrait-name-en {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.05em;
}
.portrait-meta-perplex .portrait-name-cn {
  font-family: 'Caveat', 'Noto Serif SC', cursive;
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  line-height: 1.0;
  margin-top: 4px;
}

/* ============== Article 主体 ============== */
.theme-perplex .article {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px clamp(32px, 5vw, 60px) 60px;
}
.board-perplex {
  background: var(--pp-panel);
  border: 1px solid var(--pp-border);
  border-radius: 22px;
  padding: 44px 40px;
  margin: 28px 0;
  box-shadow: 0 6px 22px rgba(26, 58, 82, 0.06);
  position: relative;
}
.board-perplex .board-marker {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
}
.board-perplex .marker-num {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(32, 178, 170, 0.10);
  border: 1px solid rgba(32, 178, 170, 0.30);
  color: var(--pp-teal-deep);
  border-radius: 6px;
  font-weight: 700;
}
.board-perplex .marker-label {
  color: var(--pp-ink-dim);
  letter-spacing: 0.04em;
}
.board-perplex .board-title {
  font-family: 'Noto Serif SC', serif;
  font-weight: 800;
  font-size: 28px;
  line-height: 1.4;
  color: var(--pp-ink);
  margin: 0 0 22px;
}
.board-perplex p {
  font-size: 16px;
  line-height: 1.95;
  color: var(--pp-ink-soft);
  margin: 14px 0;
}
.board-perplex p strong {
  color: var(--pp-ink);
  font-weight: 700;
  background: linear-gradient(180deg, transparent 80%, var(--pp-amber) 80%);
  padding: 0 3px;
}
.board-perplex p em {
  color: var(--pp-deep); font-style: italic;
}
.board-perplex .highlight-marker {
  background: linear-gradient(180deg, transparent 78%, rgba(32, 178, 170, 0.22) 78%);
  color: var(--pp-deep);
  padding: 0 4px;
  font-weight: 700;
}
.board-perplex .emphasized-line {
  margin: 24px 0;
  padding: 18px 22px;
  background: rgba(32, 178, 170, 0.06);
  border-left: 3px solid var(--pp-teal);
  border-radius: 8px;
  font-family: 'Noto Serif SC', serif;
  font-size: 19px;
  font-weight: 600;
  color: var(--pp-ink);
  line-height: 1.7;
}

/* big-quote - 引用链接卡片样式 */
.board-perplex .big-quote {
  margin: 26px 0;
  padding: 24px 28px;
  background: linear-gradient(135deg, rgba(32, 178, 170, 0.06), rgba(26, 58, 82, 0.04));
  border: 1px solid rgba(32, 178, 170, 0.22);
  border-radius: 14px;
  position: relative;
}
.board-perplex .big-quote::before {
  content: "[ source ]";
  position: absolute;
  top: -10px; left: 18px;
  padding: 2px 10px;
  background: var(--pp-panel);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--pp-teal-deep);
  border: 1px solid rgba(32, 178, 170, 0.30);
  border-radius: 4px;
}
.board-perplex .big-quote p {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  line-height: 1.85;
  color: var(--pp-ink);
  margin: 6px 0 8px;
}
.board-perplex .big-quote cite {
  display: block;
  font-style: normal;
  font-size: 13px;
  color: var(--pp-ink-dim);
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
}
.board-perplex .big-quote-teal { border-color: var(--pp-teal); background: rgba(32, 178, 170, 0.08); }
.board-perplex .big-quote-deep { border-color: var(--pp-deep-soft); background: rgba(26, 58, 82, 0.06); }
.board-perplex .big-quote-amber { border-color: var(--pp-amber-deep); background: rgba(253, 224, 71, 0.18); }
.board-perplex .big-quote-amber::before { color: var(--pp-amber-deep); border-color: var(--pp-amber-deep); }

/* callout */
.board-perplex .callout {
  margin: 22px 0;
  padding: 18px 22px;
  background: var(--pp-panel-2);
  border: 1px dashed var(--pp-border);
  border-radius: 12px;
}
.board-perplex .callout p {
  margin: 0;
  font-size: 15px;
  color: var(--pp-ink-soft);
}
.board-perplex .callout-key {
  background: rgba(32, 178, 170, 0.06);
  border-color: rgba(32, 178, 170, 0.30);
}
.board-perplex .callout-key p strong { color: var(--pp-teal-deep); }
.board-perplex .callout-insight {
  background: rgba(253, 224, 71, 0.18);
  border-color: rgba(202, 138, 4, 0.30);
}

/* insight-list */
.board-perplex .insight-list {
  list-style: none; padding: 0; margin: 20px 0;
}
.board-perplex .insight-list li {
  position: relative;
  padding: 10px 0 10px 30px;
  font-size: 15px;
  color: var(--pp-ink-soft);
  border-bottom: 1px dashed var(--pp-border);
  line-height: 1.7;
  counter-increment: pp-li;
}
.board-perplex .insight-list {
  counter-reset: pp-li;
}
.board-perplex .insight-list li::before {
  content: "[" counter(pp-li, decimal-leading-zero) "]";
  position: absolute; left: 0; top: 12px;
  color: var(--pp-teal);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
}

/* pair-grid */
.board-perplex .pair-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  margin: 24px 0;
}
.board-perplex .pair-side {
  padding: 20px;
  border-radius: 14px;
  background: var(--pp-panel-2);
  border: 1px solid var(--pp-border);
}
.board-perplex .pair-old { background: rgba(107, 114, 128, 0.06); }
.board-perplex .pair-new {
  background: linear-gradient(135deg, rgba(32, 178, 170, 0.08), rgba(26, 58, 82, 0.04));
  border-color: rgba(32, 178, 170, 0.25);
}
.board-perplex .pair-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--pp-ink-dim);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.board-perplex .pair-headline {
  font-family: 'Noto Serif SC', serif;
  font-weight: 700;
  font-size: 17px;
  color: var(--pp-ink);
  margin-bottom: 8px;
}
.board-perplex .pair-detail {
  font-size: 13px;
  line-height: 1.7;
  color: var(--pp-ink-soft);
}
.board-perplex .pair-vs {
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--pp-teal);
}

/* metrics-row */
.board-perplex .metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.board-perplex .metric-mini {
  padding: 14px;
  background: var(--pp-panel-2);
  border: 1px solid var(--pp-border);
  border-radius: 12px;
}
.board-perplex .metric-mini .mm-num {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 18px;
  color: var(--pp-deep);
}
.board-perplex .metric-mini .mm-label {
  font-size: 12px;
  color: var(--pp-ink-dim);
  margin-top: 4px;
}

/* connector */
.theme-perplex .connector {
  text-align: center;
  padding: 8px 0;
  font-size: 16px;
  letter-spacing: 12px;
  color: var(--pp-teal);
  opacity: 0.55;
}

/* ============== 金句卡片区 ============== */
.theme-perplex .quotes-section {
  max-width: 1100px;
  width: 100%;
  margin: 60px auto;
  padding: 60px clamp(32px, 5vw, 60px) 80px;
  background: var(--pp-panel);
  border-radius: 24px;
  border: 1px solid var(--pp-border);
}
.theme-perplex .quotes-section-marker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--pp-ink-dim);
  text-align: center;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.theme-perplex .quotes-section-title {
  font-family: 'Noto Serif SC', serif;
  font-weight: 800;
  font-size: 28px;
  color: var(--pp-ink);
  text-align: center;
  margin: 0 0 8px;
}
.theme-perplex .quotes-section-deck {
  text-align: center;
  font-size: 14px;
  color: var(--pp-ink-soft);
  max-width: 600px;
  margin: 0 auto 28px;
  line-height: 1.7;
}
.theme-perplex .quote-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.theme-perplex .quote-card {
  background: var(--pp-panel);
  border: 1px solid var(--pp-border);
  border-radius: 14px;
  padding: 24px 22px;
  min-height: 280px;
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column;
  cursor: default;
  transition: transform .35s, box-shadow .35s, border-color .35s;
}
.theme-perplex .quote-card:hover {
  transform: translateY(-3px);
}
.theme-perplex .card-teal:hover { border-color: var(--pp-teal); box-shadow: 0 14px 36px rgba(32, 178, 170, 0.18); }
.theme-perplex .card-deep:hover { border-color: var(--pp-deep); box-shadow: 0 14px 36px rgba(26, 58, 82, 0.18); }
.theme-perplex .card-amber:hover { border-color: var(--pp-amber-deep); box-shadow: 0 14px 36px rgba(202, 138, 4, 0.18); }
.theme-perplex .quote-card .card-bg-pattern {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(31, 41, 55, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 41, 55, 0.03) 1px, transparent 1px);
  background-size: 14px 14px;
  pointer-events: none;
}
.theme-perplex .quote-card .card-num {
  position: relative;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 700;
  color: var(--pp-teal-deep);
  letter-spacing: 0.1em;
}
.theme-perplex .quote-card .card-mark {
  position: absolute;
  top: 12px; right: 18px;
  font-family: 'Noto Serif SC', serif;
  font-size: 56px;
  color: rgba(32, 178, 170, 0.18);
  line-height: 1;
}
.theme-perplex .quote-card .card-tag {
  display: inline-block;
  margin: 8px 0 12px;
  padding: 3px 10px;
  background: rgba(32, 178, 170, 0.10);
  color: var(--pp-teal-deep);
  border-radius: 999px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  position: relative;
}
.theme-perplex .quote-card .card-quote-cn {
  font-family: 'Noto Serif SC', serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--pp-ink);
  margin: 8px 0;
  position: relative;
  flex: 1;
}
.theme-perplex .quote-card .card-quote-en {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--pp-teal-deep);
  font-style: italic;
  margin-bottom: 14px;
  position: relative;
}
.theme-perplex .quote-card .card-context {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--pp-ink-dim);
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--pp-border);
  position: relative;
}
.theme-perplex .quote-card .card-source { color: var(--pp-ink-faint); }
.theme-perplex .card-teal { background: linear-gradient(155deg, rgba(32, 178, 170, 0.08), var(--pp-panel) 60%); border-color: rgba(32, 178, 170, 0.30); }
.theme-perplex .card-teal .card-mark { color: rgba(32, 178, 170, 0.30); }
.theme-perplex .card-deep { background: linear-gradient(155deg, rgba(26, 58, 82, 0.08), var(--pp-panel) 60%); border-color: rgba(26, 58, 82, 0.25); }
.theme-perplex .card-deep .card-mark { color: rgba(26, 58, 82, 0.22); }
.theme-perplex .card-deep .card-num, .theme-perplex .card-deep .card-tag { color: var(--pp-deep); }
.theme-perplex .card-deep .card-tag { background: rgba(26, 58, 82, 0.08); }
.theme-perplex .card-amber { background: linear-gradient(155deg, rgba(253, 224, 71, 0.30), var(--pp-panel) 60%); border-color: rgba(202, 138, 4, 0.35); }
.theme-perplex .card-amber .card-mark { color: rgba(202, 138, 4, 0.30); }
.theme-perplex .card-amber .card-num, .theme-perplex .card-amber .card-tag { color: var(--pp-amber-deep); }
.theme-perplex .card-amber .card-tag { background: rgba(253, 224, 71, 0.40); }
.theme-perplex .quotes-section-tip {
  text-align: center;
  font-size: 13px;
  color: var(--pp-ink-dim);
  margin-top: 22px;
}

/* ============== Ending ============== */
.theme-perplex .ending {
  max-width: 1100px;
  margin: 60px auto;
  padding: 50px clamp(32px, 5vw, 60px);
  background:
    radial-gradient(120% 100% at 20% 0%, rgba(32, 178, 170, 0.14) 0%, transparent 55%),
    linear-gradient(180deg, var(--pp-panel) 0%, var(--pp-panel-2) 100%);
  border-radius: 20px;
  border: 1px solid var(--pp-border);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.theme-perplex .ending-marker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--pp-teal-deep);
  letter-spacing: 0.14em;
  margin-bottom: 14px;
}
.theme-perplex .ending-title {
  font-family: 'Noto Serif SC', serif;
  font-weight: 900;
  font-size: 30px;
  line-height: 1.35;
  color: var(--pp-ink);
  margin-bottom: 20px;
}
.theme-perplex .ending p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--pp-ink-soft);
  margin: 12px 0;
  text-align: left;
}
.theme-perplex .ending p strong {
  color: var(--pp-ink);
  background: linear-gradient(180deg, transparent 80%, var(--pp-amber) 80%);
  padding: 0 3px;
}
.theme-perplex .ending p em { color: var(--pp-deep); font-style: italic; }
.theme-perplex .ending-mantra {
  margin: 30px 0;
  padding: 22px;
  background: rgba(32, 178, 170, 0.06);
  border: 1px solid rgba(32, 178, 170, 0.25);
  border-radius: 16px;
  font-family: 'Noto Serif SC', serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--pp-ink);
  line-height: 1.85;
  text-align: left;
}
.theme-perplex .ending-mantra strong { color: var(--pp-teal-deep); }
.theme-perplex .ending-pulse {
  margin-top: 28px;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.theme-perplex .ending-final-line {
  font-family: 'JetBrains Mono', monospace;
  color: var(--pp-deep);
  font-size: 17px;
  font-weight: 700;
  padding: 10px 20px;
  background: rgba(32, 178, 170, 0.10);
  border: 1px solid rgba(32, 178, 170, 0.30);
  border-radius: 999px;
}
.theme-perplex .ending-sub-line {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  color: var(--pp-ink-soft);
  line-height: 1.8;
}
.theme-perplex .ending-sub-line strong {
  color: var(--pp-teal-deep);
  background: none;
  font-weight: 700;
}

/* ============== References ============== */
.theme-perplex .references {
  max-width: 1100px;
  margin: 40px auto 60px;
  padding: 32px clamp(32px, 5vw, 60px);
  background: var(--pp-panel);
  border: 1px solid var(--pp-border);
  border-radius: 16px;
}
.theme-perplex .references h3 {
  color: var(--pp-ink);
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 19px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px dashed rgba(32, 178, 170, 0.30);
}
.theme-perplex .references ul { list-style: none; padding: 0; margin: 0; }
.theme-perplex .references li {
  padding: 12px 0;
  border-bottom: 1px solid var(--pp-border-soft);
  font-size: 14px;
}
.theme-perplex .references a { color: var(--pp-teal-deep); text-decoration: none; }
.theme-perplex .references a:hover { color: var(--pp-deep); text-decoration: underline; }
.theme-perplex .ref-tag {
  display: inline-block;
  margin-left: 10px;
  padding: 2px 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--pp-ink-dim);
  background: var(--pp-panel-2);
  border-radius: 4px;
}
.theme-perplex .ref-meta {
  margin-top: 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--pp-ink-dim);
  line-height: 1.7;
}

/* ============== Modal ============== */
.theme-perplex .modal-overlay { background: rgba(31, 41, 55, 0.78); }
.theme-perplex .modal-close { color: var(--pp-ink); }
.theme-perplex .modal-btn {
  background: var(--pp-panel-2);
  color: var(--pp-ink);
  border: 1px solid var(--pp-border);
}
.theme-perplex .modal-btn:hover { background: rgba(32, 178, 170, 0.10); border-color: var(--pp-teal); color: var(--pp-teal-deep); }
.theme-perplex .modal-counter { color: var(--pp-ink-dim); }
.theme-perplex .modal-download-btn {
  background: linear-gradient(135deg, var(--pp-teal), var(--pp-deep));
  color: #fff;
  font-weight: 700;
}

/* ============== 移动端 ============== */
@media (max-width: 720px) {
  .hero-perplex { padding: 88px 18px 40px; }
  .hero-perplex .title-line-emphasis { font-size: 40px; }
  .hero-perplex .title-line { font-size: 22px; }
  .hero-perplex .title-eyebrow { font-size: 18px; }
  .hero-perplex .hero-meta {
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 24px 0;
  }
  .hero-perplex .hm-item {
    flex: 0 0 auto;
    width: auto;
    align-items: center;
    text-align: center;
    gap: 8px;
  }
  .hero-perplex .hm-num { font-size: 34px; line-height: 1; }
  .hero-perplex .hm-unit { font-size: 11px; letter-spacing: 0.14em; }
  .hero-perplex .hm-label { text-align: center; font-size: 13px; line-height: 1.6; }
  .hero-perplex .hm-divider {
    width: 48px;
    height: 1px;
    background: rgba(32, 178, 170, 0.35);
    align-self: center;
  }
  .board-perplex { padding: 32px 22px; border-radius: 18px; }
  .board-perplex .board-title { font-size: 22px; }
  .board-perplex .pair-grid { grid-template-columns: 1fr; }
  .board-perplex .pair-vs { justify-content: center; }
  .portrait-perplex { max-width: 92%; }
  .portrait-frame-perplex { padding: 10px 10px 0; }
  .portrait-frame-perplex::before { width: 68px; left: 20px; }
  .portrait-frame-perplex::after { width: 58px; right: 24px; }
  .portrait-meta-perplex { padding: 10px 4px 10px; }
  .theme-perplex .ending { padding: 36px 24px; }
  .theme-perplex .ending-title { font-size: 24px; }

  /* 数据 stat 区移动端单列竖排，避免高度参差不齐 */
  .board-perplex .metrics-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .board-perplex .metric-mini,
  .board-perplex .metric-cell {
    padding: 16px 18px;
  }

  /* 金句区 / 尾声区 / 参考资料区不能贴视口左右边缘 */
  .theme-perplex .quotes-section {
    margin: 40px 16px;
    padding: 40px 22px 56px;
    border-radius: 16px;
  }
  .theme-perplex .quotes-section-title { font-size: 24px; }
  .theme-perplex .ending {
    margin: 40px 16px;
    padding: 36px 22px;
    border-radius: 16px;
  }
  .theme-perplex .references {
    margin: 32px 16px 48px;
    padding: 28px 22px;
    border-radius: 14px;
  }
}