/* ==========================================================================
   Daily Brief — 青之档案主题（唯一正式主题）
   设计语言：克莱因蓝 duotone × 方格纸 × 明朝体 × 印刷档案感
   参考：知识库素材库「蓝色双色调日系拼贴」「校正シート日式抽象版式」
   动效基线：micro-spells 配方 R1/R2/R3/R28（ease-out、scale 0.93+、骨架拟形）
   ========================================================================== */

:root {
  --font-serif: Georgia, "Times New Roman", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --font-mono: "Cascadia Code", Consolas, "Courier New", monospace;

  --bg: #fbfbf8;
  --ink: #16181d;
  --ink-soft: #454a56;
  --ink-faint: #8a8f9c;
  --accent: #002fa7;
  --accent-wash: rgba(0, 47, 167, 0.06);
  --card: #ffffff;
  --card-edge: #dfe3ea;
  --rule: #dde0e7;
  --rule-strong: #002fa7;
  --wash: #f2f6fd;
  --sk-1: #eef0f4;
  --sk-2: #f7f8fa;
  --radius: 2px;
  --shadow-lift: 0 12px 28px rgba(0, 47, 167, 0.1);

  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- 基础 ---------- */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 动态方格纸底：缓慢漂移的网格 */
body::before {
  content: "";
  position: fixed;
  inset: -48px;
  z-index: -2;
  background-image:
    linear-gradient(rgba(0, 47, 167, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 47, 167, 0.045) 1px, transparent 1px);
  background-size: 24px 24px;
  animation: grid-drift 90s linear infinite;
  pointer-events: none;
}

@keyframes grid-drift {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(24px, 24px);
  }
}

/* 左上角的呼吸光晕 */
body::after {
  content: "";
  position: fixed;
  top: -18rem;
  left: -12rem;
  width: 42rem;
  height: 42rem;
  z-index: -2;
  background: radial-gradient(circle, rgba(0, 47, 167, 0.07), transparent 65%);
  animation: glow 12s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes glow {
  from {
    opacity: 0.5;
    transform: scale(1);
  }
  to {
    opacity: 1;
    transform: scale(1.12);
  }
}

/* 漂浮星屑粒子 */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.bg-fx span {
  position: absolute;
  color: var(--accent);
  animation: drift 16s ease-in-out infinite alternate;
}

.bg-fx span:nth-child(1) { top: 16%; left: 5%; font-size: 1.5rem; opacity: 0.16; }
.bg-fx span:nth-child(2) { top: 64%; left: 8%; font-size: 1rem; opacity: 0.12; animation-duration: 21s; }
.bg-fx span:nth-child(3) { top: 28%; right: 7%; font-size: 1.9rem; opacity: 0.14; animation-duration: 13s; }
.bg-fx span:nth-child(4) { top: 74%; right: 12%; font-size: 1.2rem; opacity: 0.1; animation-duration: 24s; }
.bg-fx span:nth-child(5) { top: 44%; left: 3%; font-size: 0.9rem; opacity: 0.09; animation-duration: 19s; }

@keyframes drift {
  from {
    transform: translateY(0) rotate(0deg);
  }
  to {
    transform: translateY(-26px) rotate(28deg);
  }
}

.container {
  max-width: 100rem;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 3vw, 3rem);
}

main.container {
  position: relative;
}

/* 印刷裁切角（校正シート：辅助元素当画面） */
main.container::before,
main.container::after,
.site-footer .container::before {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
}

main.container::before {
  top: 0;
  left: 0;
  border-top: 1.5px solid var(--accent);
  border-left: 1.5px solid var(--accent);
}

main.container::after {
  top: 0;
  right: 0;
  border-top: 1.5px solid var(--accent);
  border-right: 1.5px solid var(--accent);
}

.site-footer .container::before {
  bottom: 0;
  left: 0;
  border-bottom: 1.5px solid var(--accent);
  border-left: 1.5px solid var(--accent);
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--bg);
  color: var(--ink);
  padding: 0.5rem 1rem;
  border: 1px solid var(--rule-strong);
  z-index: 10;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 页头 / 页脚 ---------- */

.site-header {
  border-bottom: 3px double var(--accent);
  background: var(--bg);
}

.header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.3rem;
  padding-bottom: 1rem;
  flex-wrap: wrap;
}

.site-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.site-name:hover {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.nav-issue {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--accent);
}

.nav-link {
  font-size: 0.92rem;
  color: var(--ink-soft);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 0.25s var(--ease-out-quart), color 0.2s ease;
  padding-bottom: 2px;
}

.nav-link:hover {
  color: var(--accent);
  background-size: 100% 1px;
}

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 4.5rem;
}

.site-footer .container {
  position: relative;
}

.site-footer p {
  font-size: 0.85rem;
  color: var(--ink-faint);
  padding: 1.3rem 0 1.7rem;
  margin: 0;
}

/* 条形码 */
.site-footer .container::after {
  content: "";
  position: absolute;
  right: 1.25rem;
  bottom: 1.6rem;
  width: 140px;
  height: 28px;
  background: repeating-linear-gradient(
    90deg,
    var(--ink) 0 2px,
    transparent 2px 4px,
    var(--ink) 4px 7px,
    transparent 7px 8px,
    var(--ink) 8px 9px,
    transparent 9px 13px
  );
  opacity: 0.7;
}

/* ---------- 骨架屏（拟形，R28） ---------- */

.status-block {
  padding: 3.5rem 0 3rem;
  color: var(--ink-soft);
  position: relative;
}

/* 空态/错误态的呼吸星标 */
.status-block::before {
  content: "✦";
  position: absolute;
  top: 1.4rem;
  left: -0.2rem;
  font-size: 1.6rem;
  color: var(--accent);
  animation: float 3.4s var(--ease-out-quart) infinite alternate;
}

.status-block[hidden] {
  display: none;
}

.status-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0 0 0.4rem;
  color: var(--ink);
}

.status-block p {
  margin: 0.3rem 0;
}

.status-block a {
  color: var(--accent);
}

@keyframes float {
  from {
    transform: translateY(0) rotate(-6deg);
  }
  to {
    transform: translateY(-8px) rotate(6deg);
  }
}

.skeleton {
  max-width: 40rem;
}

.sk {
  background: linear-gradient(90deg, var(--sk-1) 25%, var(--sk-2) 50%, var(--sk-1) 75%) 0 0 / 200% 100%;
  animation: shimmer 1.4s linear infinite;
  border-radius: var(--radius);
}

@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

.sk-kicker {
  width: 9rem;
  height: 0.85rem;
  margin-bottom: 1.1rem;
}

.sk-title {
  width: 78%;
  height: 2.6rem;
  margin-bottom: 1.2rem;
}

.sk-line {
  height: 1rem;
  margin-bottom: 0.7rem;
}

.sk-line-short {
  width: 62%;
}

.sk-card {
  height: 10rem;
  margin-top: 1.4rem;
}

.sk-lead {
  height: 17rem;
}

.sk-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.sk-row .sk-card {
  margin-top: 0;
}

/* ---------- 滚动揭示 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
}

.reveal.is-revealed {
  opacity: 1;
  transform: none;
  transition:
    opacity 0.55s var(--ease-out-quart),
    transform 0.55s var(--ease-out-quart);
}

/* ---------- 每日总览 ---------- */

.report {
  padding-top: 2.6rem;
}

.report > section + section,
.report > .topic-wrap + section,
.report > section + .topic-wrap,
.report > .topic-wrap + .topic-wrap {
  margin-top: 3.2rem;
}

.daily-summary {
  position: relative;
}

/* 圆形印章（外圈虚线环缓慢旋转） */
.stamp {
  position: absolute;
  top: -0.6rem;
  right: 0.2rem;
  width: 96px;
  height: 96px;
  border: 2.5px solid var(--accent);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px var(--bg), inset 0 0 0 4.5px var(--accent);
  display: grid;
  place-content: center;
  text-align: center;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--accent);
  letter-spacing: 0.2em;
  transform: rotate(-12deg);
  opacity: 0.85;
  pointer-events: none;
}

.stamp::before {
  content: "";
  position: absolute;
  inset: -9px;
  border: 1px dashed var(--accent);
  border-radius: 50%;
  opacity: 0.55;
  animation: spin 46s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 背景年份描边巨字 */
.bg-year {
  position: absolute;
  top: -2.4rem;
  right: 7.5rem;
  font-family: var(--font-mono);
  font-size: 7.5rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(0, 47, 167, 0.16);
  pointer-events: none;
  user-select: none;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.14em;
  margin: 0 0 0.7rem;
}

.kicker time {
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.report-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.28;
  font-weight: 700;
  margin: 0 0 0.9rem;
  text-wrap: balance;
}

.one-liner {
  font-size: 1.12rem;
  line-height: 1.9;
  color: var(--ink-soft);
  margin: 0 0 1.1rem;
  max-width: 42rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  margin: 0;
}

.meta-row > span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--card-edge);
  background: var(--card);
  border-radius: var(--radius);
  padding: 0.22rem 0.8rem;
}

.temp-label .dots {
  color: var(--accent);
  letter-spacing: 0.15em;
}

/* 活跃温度的呼吸（仅活跃期） */
.temp-active .dots {
  animation: pulse 2.2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}

/* ---------- Lead ---------- */

.lead-story {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-edge);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.7rem 1.6rem 1.4rem;
  overflow: hidden;
}

/* 背景巨字 */
.lead-story::before {
  content: "LEAD";
  position: absolute;
  right: 1.2rem;
  bottom: -2.6rem;
  font-family: var(--font-mono);
  font-size: 7.5rem;
  letter-spacing: 0.08em;
  color: var(--accent-wash);
  pointer-events: none;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin: 0 0 1.1rem;
}

.section-label::before {
  content: "[ ";
}

.section-label::after {
  content: " ]";
}

.lead-grid {
  display: block;
}

.lead-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1.4;
  margin: 0 0 0.7rem;
  text-wrap: balance;
}

.lead-brief {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0 0 1rem;
  max-width: 40rem;
}

/* 拍立得相框：白边 + 图注在框内 */
.lead-figure {
  margin: 1.4rem 0;
  position: relative;
  background: #fff;
  border: 1px solid var(--card-edge);
  padding: 0.65rem 0.65rem 0.4rem;
  box-shadow: 0 8px 22px rgba(0, 47, 167, 0.09);
  transform: rotate(-0.6deg);
  transition: transform 0.3s var(--ease-out-quart), box-shadow 0.3s var(--ease-out-quart);
}

.lead-figure:hover {
  transform: rotate(0deg) translateY(-2px);
  box-shadow: var(--shadow-lift);
}

/* 纸胶带 */
.lead-figure::before {
  content: "";
  position: absolute;
  top: -11px;
  left: 18px;
  width: 88px;
  height: 24px;
  background: rgba(0, 47, 167, 0.16);
  transform: rotate(-4deg);
  pointer-events: none;
  z-index: 1;
}

.lead-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--card-edge);
  /* 照片染蓝（duotone），悬停显色 */
  filter: grayscale(0.85) sepia(0.28) hue-rotate(183deg) saturate(1.9) brightness(1.02);
  transition: filter 0.4s var(--ease-out-quart);
}

.lead-figure img:hover {
  filter: none;
}

.lead-figure figcaption {
  font-size: 0.78rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  margin-top: 0.5rem;
  text-align: center;
}

.prose p {
  margin: 0 0 1rem;
  max-width: 40rem;
}

.why {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  background: var(--wash);
  border-left: 3px solid var(--accent);
  padding: 0.85rem 1.1rem;
  margin: 1.2rem 0 0;
  max-width: 40rem;
}

.why-label {
  flex-shrink: 0;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--accent);
}

.why p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.lead-source {
  margin-top: 1rem;
}

/* ---------- 跑马灯票签 / 套色色条 ---------- */

.ticker {
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
  background: var(--card);
}

.ticker-track {
  display: inline-flex;
  gap: 2.6rem;
  width: max-content;
  padding: 0.4rem 0;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  animation: ticker 30s linear infinite;
}

.ticker:hover .ticker-track {
  animation-play-state: paused;
}

@keyframes ticker {
  to {
    transform: translateX(-50%);
  }
}

.color-chips {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.color-chips .chip-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  margin-right: 0.35rem;
}

.color-chips i {
  width: 13px;
  height: 13px;
  display: inline-block;
}

.color-chips i:nth-child(2) { background: #002fa7; }
.color-chips i:nth-child(3) { background: #1f4db8; }
.color-chips i:nth-child(4) { background: #4a74c9; }
.color-chips i:nth-child(5) { background: #7d9fdb; }
.color-chips i:nth-child(6) { background: #b3cbec; }
.color-chips i:nth-child(7) { background: #16181d; }

/* 信息胶囊进场（一次性 stagger） */
.meta-row > span {
  animation: rise 0.5s var(--ease-out-quart) both;
}

.meta-row > span:nth-child(1) { animation-delay: 0.05s; }
.meta-row > span:nth-child(2) { animation-delay: 0.15s; }
.meta-row > span:nth-child(3) { animation-delay: 0.25s; }

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

/* 主题分区编号 */
.sec-no {
  font-family: var(--font-mono);
  font-size: 0.72em;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-left: 0.4rem;
  vertical-align: 0.25em;
}

/* ---------- 来源行 ---------- */

.source-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1rem;
  font-size: 0.88rem;
  margin: 0;
}

.source-row .source-gap {
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.source-link,
.all-sources-btn {
  font: inherit;
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
  background-color: transparent;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  border: none;
  padding: 0 0 1px;
  cursor: pointer;
  transition: background-size 0.25s var(--ease-out-quart);
}

.source-link:hover,
.all-sources-btn:hover {
  background-size: 100% 1px;
}

.source-link:active,
.all-sources-btn:active,
.panel-close:active,
.date-nav a:active {
  transform: scale(0.97);
}

.source-link .ext {
  font-size: 0.8em;
  margin-left: 0.15em;
}

/* ---------- Highlights ---------- */

.highlight-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.highlight-item {
  padding: 1.4rem 1.5rem;
  background: var(--card);
  border: 1px solid var(--card-edge);
  border-radius: var(--radius);
  transition:
    transform 0.25s var(--ease-out-quart),
    box-shadow 0.25s var(--ease-out-quart);
}

.highlight-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.highlight-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-variant-numeric: tabular-nums;
}

.highlight-num::before {
  content: "NO.";
  font-size: 0.7em;
  margin-right: 0.2em;
  color: var(--ink-faint);
}

.highlight-cat {
  font-size: 0.78rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  margin: 0 0 0.4rem;
}

.story-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  line-height: 1.5;
  font-weight: 700;
  margin: 0 0 0.4rem;
  text-wrap: balance;
}

.story-brief {
  margin: 0 0 0.6rem;
  color: var(--ink-soft);
  max-width: 40rem;
}

.highlight-item .why {
  margin: 0.8rem 0 0.8rem;
  padding: 0.7rem 1rem;
}

/* ---------- 主题分区 ---------- */

.topic-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.3rem;
}

.topic-title::before {
  content: "";
  width: 0.8rem;
  height: 0.8rem;
  background: var(--accent);
  flex-shrink: 0;
}

.topic-summary {
  font-size: 0.92rem;
  color: var(--ink-faint);
  margin: 0 0 0.4rem;
}

.topic-stories {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 0.9rem;
}

.story-card {
  padding: 1.15rem 1.35rem;
  background: var(--card);
  border: 1px solid var(--card-edge);
  border-radius: var(--radius);
  transition:
    transform 0.25s var(--ease-out-quart),
    box-shadow 0.25s var(--ease-out-quart);
}

.story-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.story-card .story-title {
  font-size: 1.06rem;
}

/* ---------- Watch Next（票根：打孔 + 撕票线） ---------- */

.watch-next {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-edge);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.35rem 1.55rem;
}

.watch-next::before,
.watch-next::after {
  content: "";
  position: absolute;
  left: -10px;
  width: 18px;
  height: 18px;
  background: var(--bg);
  border: 1px solid var(--card-edge);
  border-radius: 50%;
}

.watch-next::before {
  top: 16%;
}

.watch-next::after {
  bottom: 16%;
}

.watch-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.watch-list li {
  display: flex;
  gap: 0.7rem;
  padding: 0.55rem 0;
  color: var(--ink-soft);
  max-width: 42rem;
}

.watch-list li::before {
  content: "→";
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.25s var(--ease-spring);
}

.watch-list li:hover::before {
  transform: translateX(4px);
}

/* ---------- 日期导航 ---------- */

.date-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 3.2rem;
  font-size: 0.92rem;
}

.date-nav a {
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--card-edge);
  background: var(--card);
  padding: 0.45rem 1.15rem;
  transition:
    transform 0.2s var(--ease-spring),
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.date-nav a:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.date-nav .nav-newest {
  margin-left: auto;
}

.date-nav [aria-disabled="true"] {
  color: var(--ink-faint);
  border: 1px dashed var(--rule);
  padding: 0.45rem 1.15rem;
  text-decoration: line-through;
  pointer-events: none;
}

/* ---------- 来源面板 ---------- */

.source-panel {
  width: min(34rem, calc(100vw - 2rem));
  max-height: min(32rem, calc(100vh - 4rem));
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  padding: 0;
  font-family: var(--font-serif);
}

.source-panel[open] {
  animation: panel-in 0.24s var(--ease-out-quart);
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
}

.source-panel::backdrop {
  background: rgba(22, 24, 29, 0.35);
  animation: backdrop-in 0.24s ease-out;
}

@keyframes backdrop-in {
  from {
    opacity: 0;
  }
}

.source-panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 1.3rem;
  border-bottom: 1px solid var(--rule);
}

.source-panel-head h2 {
  font-size: 1.15rem;
  margin: 0;
}

.panel-close {
  font: inherit;
  font-size: 0.88rem;
  color: var(--ink-soft);
  background: none;
  border: 1px solid var(--rule);
  padding: 0.25rem 0.85rem;
  cursor: pointer;
  transition: transform 0.15s var(--ease-spring), border-color 0.2s ease;
}

.panel-close:hover {
  color: var(--ink);
  border-color: var(--rule-strong);
}

.source-list {
  list-style: none;
  margin: 0;
  padding: 0.4rem 0 0.8rem;
  overflow-y: auto;
}

.source-list li {
  padding: 0.9rem 1.3rem;
  border-bottom: 1px solid var(--rule);
}

.source-list li:last-child {
  border-bottom: none;
}

.source-name {
  font-weight: 700;
  margin: 0 0 0.15rem;
}

.source-original {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0 0 0.3rem;
}

.source-meta {
  font-size: 0.78rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  margin: 0 0 0.4rem;
}

.source-open {
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 0.25s var(--ease-out-quart);
  padding-bottom: 1px;
}

.source-open:hover {
  background-size: 100% 1px;
}

.source-via {
  font-size: 0.8rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  margin-left: 0.9rem;
}

.source-via a {
  color: inherit;
}

/* ---------- Archive ---------- */

.archive {
  padding-top: 2.6rem;
}

.archive-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  margin: 0 0 1.7rem;
}

.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.archive-item {
  background: var(--card);
  border: 1px solid var(--card-edge);
  border-radius: var(--radius);
  transition:
    transform 0.25s var(--ease-out-quart),
    box-shadow 0.25s var(--ease-out-quart);
}

.archive-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.archive-item a {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 0.2rem 1.8rem;
  padding: 1.35rem 1.6rem;
  text-decoration: none;
}

.archive-item a:hover .archive-item-title {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.archive-item-date {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  padding-top: 0.25rem;
}

.archive-item-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.5;
  margin: 0;
}

.archive-item-sum {
  font-size: 0.92rem;
  color: var(--ink-faint);
  margin: 0.25rem 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 图片降级 ---------- */

img {
  max-width: 100%;
}

/* ---------- 桌面版式（PC 优先） ---------- */

@media (min-width: 48rem) {
  .header-row {
    padding-top: 1.6rem;
    padding-bottom: 1.2rem;
  }

  .lead-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.95fr);
    gap: 2.2rem;
    align-items: start;
  }

  .lead-grid .lead-figure {
    margin-top: 0.4rem;
  }

  .lead-story {
    padding: 2rem 2rem 1.6rem;
  }

  /* 竖排标签移到卡片左缘 */
  .lead-story > .section-label {
    position: absolute;
    top: 1.8rem;
    left: 0.55rem;
    margin: 0;
    writing-mode: vertical-rl;
    letter-spacing: 0.42em;
    font-size: 0.75rem;
  }

  .lead-story {
    padding-left: 3.2rem;
  }

  .highlight-list {
    grid-template-columns: 1fr 1fr;
  }

  .topic-stories {
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  }

  .report-title {
    font-size: clamp(2.2rem, 4.6vw, 3.2rem);
  }

  .one-liner {
    font-size: 1.18rem;
  }
}

/* ---------- 窄屏 ---------- */

@media (max-width: 47.99rem) {
  body {
    font-size: 15px;
  }

  .report,
  .archive {
    padding-top: 1.6rem;
  }

  .report > section + section,
  .report > .topic-wrap + section,
  .report > section + .topic-wrap,
  .report > .topic-wrap + .topic-wrap {
    margin-top: 2.2rem;
  }

  .lead-story {
    padding: 1.25rem 1.1rem 1.1rem;
  }

  .highlight-item {
    padding: 1.15rem 1.15rem;
  }

  .sk-row {
    grid-template-columns: 1fr;
  }

  .stamp {
    display: none;
  }

  .bg-year {
    display: none;
  }

  .bg-fx span {
    opacity: 0.08;
  }

  .nav-issue {
    display: none;
  }

  .archive-item a {
    grid-template-columns: 1fr;
    gap: 0.3rem;
    padding: 1.15rem 1.25rem;
  }

  .date-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .date-nav a,
  .date-nav [aria-disabled="true"] {
    text-align: center;
  }

  .date-nav .nav-newest {
    margin-left: 0;
  }

  .why {
    flex-direction: column;
    gap: 0.3rem;
  }

  .site-footer .container::after {
    display: none;
  }

  /* 窄屏关闭装饰性裁切标记，避免视口溢出 */
  main.container::before,
  main.container::after,
  .site-footer .container::before {
    display: none;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}