/* ============================================
   AI 时代的产品人 · 系列首页样式
   ============================================ */

.series-page {
  background: var(--paper);
}

/* ---------- HERO ---------- */
.series-hero {
  position: relative;
  min-height: auto;
  padding: 80px 32px 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.series-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 220, 90, 0.12), transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(199, 85, 85, 0.08), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(140, 195, 230, 0.1), transparent 50%);
  pointer-events: none;
}

.series-hero-inner {
  max-width: 1100px;
  width: 100%;
  text-align: center;
  position: relative;
  z-index: 2;
}

.series-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(180, 170, 145, 0.3);
  border-radius: 999px;
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}

.series-h1 {
  font-family: 'Noto Serif SC', serif;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.series-h1-line {
  display: block;
  font-size: clamp(36px, 5vw, 64px);
  color: var(--ink);
  white-space: nowrap;
}
.series-h1-accent {
  background: linear-gradient(180deg, transparent 60%, var(--marker-yellow) 60%);
  display: inline;
  padding: 0 8px;
}

.series-subtitle {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  color: var(--ink);
  line-height: 1.7;
  margin-bottom: 16px;
  font-weight: 500;
}
.series-subtitle em {
  font-style: normal;
  background: var(--marker-yellow);
  padding: 1px 6px;
}

.series-deck {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.series-meta-row {
  display: inline-flex;
  align-items: center;
  gap: 32px;
  background: #fff;
  border: 1px solid rgba(180, 170, 145, 0.3);
  border-radius: 16px;
  padding: 16px 28px;
  margin-bottom: 24px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}
.meta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.meta-num {
  font-family: 'Caveat', cursive;
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-red);
  line-height: 1;
}
.meta-label {
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.1em;
}
.meta-divider {
  width: 1px;
  height: 40px;
  background: rgba(180, 170, 145, 0.4);
}

/* ============================================
   主内容区
   ============================================ */
.series-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px 80px;
}

/* ---------- 重头戏卡片 ---------- */
.issue-card {
  background: #fff;
  border-radius: 16px;
  padding: 0;
  margin-bottom: 48px;
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.02),
    0 8px 40px rgba(0, 0, 0, 0.06),
    0 0 0 1px rgba(180, 170, 145, 0.15);
  overflow: visible;
  position: relative;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.issue-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.issue-featured::before {
  display: none; /* 已替换为 HTML 中的产品 logo */
}

/* 产品 logo 圆形容器 —— 盖章效果，压在卡片右上角 */
.product-logo-badge {
  position: absolute;
  top: -16px;
  right: -16px;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.14), 0 0 0 2px rgba(180, 170, 145, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  overflow: hidden;
  padding: 3px;
}
.product-logo-badge img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

.issue-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.issue-cards-grid .issue-card {
  margin-bottom: 0;
}

.issue-card-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 28px 28px 24px;
  border-radius: 16px;
  overflow: hidden;
}

@media (max-width: 900px) {
  .issue-cards-grid {
    grid-template-columns: 1fr;
  }
}

.issue-cover {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 16px;
}

/* ---------- 头像 ---------- */
.avatar-frame {
  width: 140px;
  height: 140px;
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-frame::before {
  /* 白板风格的虚线背景框，旋转一点点制造手绘感 */
  content: '';
  position: absolute;
  inset: -8px;
  border: 2px dashed rgba(180, 170, 145, 0.5);
  border-radius: 14px;
  transform: rotate(-2deg);
  background: var(--paper);
  z-index: 1;
}
.avatar-frame::after {
  /* 右上角图钉 */
  content: '';
  position: absolute;
  top: -4px;
  right: 14px;
  width: 16px;
  height: 16px;
  background: radial-gradient(circle at 35% 35%, #ff8888, #c44);
  border-radius: 50%;
  box-shadow:
    inset -1px -1px 2px rgba(0, 0, 0, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.25);
  z-index: 4;
}
.avatar-img-wrap {
  position: relative;
  z-index: 2;
  width: 120px;
  height: 120px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  transform: rotate(1deg);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.avatar-frame:hover .avatar-img-wrap {
  transform: rotate(0deg) scale(1.02);
}
.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* Cat Wu 原图人像偏右，把裁切框推到最右边露出完整人脸 */
.issue-archived .avatar-frame:not(.avatar-frame-terminal):not(.avatar-frame-dark) .avatar-img {
  object-position: 100% center;
}
.avatar-corner-quote {
  position: absolute;
  bottom: -10px;
  left: -14px;
  z-index: 3;
  background: var(--ink);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-family: 'Caveat', cursive;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transform: rotate(-4deg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}
.avatar-corner-quote::before {
  content: none;
}

.cover-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.cover-tag {
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 600;
}
.tag-issue {
  background: var(--ink);
  color: #fff;
}
.tag-status {
  background: rgba(90, 138, 74, 0.15);
  color: #3f7032;
  border: 1px solid rgba(90, 138, 74, 0.3);
}

/* ---------- 卡片信息 ---------- */
.issue-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.issue-meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 2px dashed rgba(180, 170, 145, 0.3);
  flex-wrap: wrap;
}
.meta-pm-name {
  font-family: 'Caveat', cursive;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-red);
  line-height: 1;
}
.meta-pm-role {
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 0.02em;
}

.issue-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.issue-subtitle {
  font-family: 'Caveat', 'Noto Serif SC', cursive;
  font-size: 20px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.issue-excerpt {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.issue-excerpt strong {
  color: var(--ink);
  background: var(--marker-yellow);
  padding: 1px 4px;
  font-weight: 500;
}

.issue-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.kw {
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--paper);
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid rgba(180, 170, 145, 0.3);
}

.issue-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  font-family: inherit;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--ink);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-red);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(199, 85, 85, 0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--ink);
}
.btn-secondary:hover {
  background: var(--ink);
  color: #fff;
}
.btn-arrow {
  font-size: 18px;
  transition: transform 0.2s;
}
.btn-primary:hover .btn-arrow,
.btn-secondary:hover .btn-arrow {
  transform: translateX(4px);
}

.issue-footer {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.05em;
  border-top: 1px solid rgba(180, 170, 145, 0.2);
  padding-top: 14px;
}

/* ---------- 即将推出 ---------- */
.upcoming-title {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin: 60px 0 28px;
}
.upcoming-tag {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  background: var(--ink);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.15em;
  font-weight: 600;
}

.issue-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.issue-card-mini {
  background: #fff;
  border: 1px solid rgba(180, 170, 145, 0.25);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease-out;
}
.issue-card-mini.visible {
  opacity: 1;
  transform: translateY(0);
}
.issue-card-mini:hover {
  border-color: var(--ink-light);
  background: var(--paper);
}

.mini-cover {
  flex-shrink: 0;
  width: 70px;
  height: 70px;
}
.mini-cover svg { width: 100%; height: 100%; }

.mini-info { flex: 1; }
.mini-tag {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--ink-light);
  font-weight: 600;
  margin-bottom: 4px;
}
.mini-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.4;
}
.mini-desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-bottom: 10px;
}
.mini-status {
  font-size: 11px;
  color: var(--ink-light);
  letter-spacing: 0.05em;
  padding-top: 8px;
  border-top: 1px dashed rgba(180, 170, 145, 0.3);
}

/* ---------- 选题原则 ---------- */
.principles {
  margin-top: 80px;
  padding: 56px 48px;
  background: linear-gradient(135deg, #fff, var(--paper));
  border-radius: 16px;
  border: 1px solid rgba(180, 170, 145, 0.2);
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}
.principles.visible {
  opacity: 1;
  transform: translateY(0);
}

.principles-marker {
  font-family: 'Caveat', cursive;
  font-size: 22px;
  color: var(--accent-red);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.principles-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink);
}

.principles-content p {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: 20px;
}
.principles-content strong {
  color: var(--ink);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 24px 0 28px;
}
.principle-item {
  display: flex;
  gap: 16px;
  padding: 20px 22px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid rgba(180, 170, 145, 0.25);
}
.principle-num {
  font-family: 'Caveat', cursive;
  font-size: 32px;
  color: var(--accent-orange);
  line-height: 1;
  font-weight: 700;
  flex-shrink: 0;
}
.principle-text {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}
.principle-text strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  margin-bottom: 4px;
}

.principles-conclusion {
  margin-top: 28px;
  padding: 24px 28px;
  background: var(--ink);
  color: #fafaf6;
  border-radius: 8px;
  font-size: 16px !important;
  line-height: 1.8 !important;
}
.principles-conclusion .highlight-marker {
  background: var(--marker-yellow);
  color: var(--ink);
  padding: 1px 6px;
  font-weight: 500;
}
.principles-conclusion strong {
  color: #fff !important;
}

/* ---------- Footer ---------- */
.series-footer {
  margin-top: 80px;
  padding: 56px 32px 40px;
  text-align: center;
  border-top: 1px solid rgba(180, 170, 145, 0.3);
}
.footer-quote {
  margin-bottom: 32px;
}
.footer-quote p {
  font-family: 'Caveat', cursive;
  font-size: 38px;
  color: var(--ink);
  font-weight: 700;
  margin-bottom: 8px;
  padding: 0 32px;
}
.footer-quote cite {
  font-style: normal;
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 0.05em;
}
.footer-meta {
  font-size: 13px;
  color: var(--ink-light);
}
.footer-meta p { margin: 4px 0; }
.footer-sub {
  font-size: 12px;
  color: var(--ink-light);
  opacity: 0.7;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 720px) {
  .series-hero { padding: 100px 20px 40px; min-height: auto; }
  .series-h1-line { font-size: clamp(28px, 8vw, 56px); white-space: normal; }
  .series-subtitle { font-size: 19px; }
  .series-deck { font-size: 15px; }
  .series-meta-row { gap: 18px; padding: 16px 22px; flex-wrap: wrap; }
  .meta-num { font-size: 28px; }
  .series-main { padding: 0 16px 60px; }
  .issue-cards-grid { grid-template-columns: 1fr; }
  .issue-card-inner { padding: 24px 20px; gap: 16px; }
  .avatar-frame { width: 100px; height: 100px; }
  .avatar-img-wrap { width: 88px; height: 88px; }
  .issue-title { font-size: 26px; }
  .issue-subtitle { font-size: 18px; margin-bottom: 16px; }
  .issue-excerpt { font-size: 14px; margin-bottom: 16px; }
  .issue-grid { grid-template-columns: 1fr; }
  .principles { padding: 36px 24px; }
  .principles-title { font-size: 24px; }
  .principles-grid { grid-template-columns: 1fr; }
  .principles-conclusion { padding: 18px 22px; font-size: 15px !important; }
  .issue-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { justify-content: center; }
  .issue-featured::before { font-size: 14px; top: 16px; right: 16px; }
}