/* ============================================================
   我们的小窝 — 双人博客阅读页
   长文阅读 / 顶部标签滚动收拢 / 目录高亮和进度条
   ============================================================ */

:root {
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
          "Segoe UI", system-ui, sans-serif;
  --white-accent: #7aa6d4;
  --brown-accent: #d49356;
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --text: #4a4f5c;
  --muted: #7a8aa0;
  --heading: #3f5a72;
}

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

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(172deg, #d3e8f4 0%, #e7f0d6 72%, #eef4e1 100%);
  background-attachment: fixed;
}

.blog-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.blog-cloud {
  position: absolute;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 50%;
  filter: blur(2px);
}
.blog-cloud::before,
.blog-cloud::after {
  content: "";
  position: absolute;
  background: inherit;
  border-radius: 50%;
}
.blog-cloud::before { width: 60%; height: 150%; top: -40%; left: 14%; }
.blog-cloud::after  { width: 46%; height: 130%; top: -26%; right: 16%; }
.blog-cloud--1 {
  width: 150px; height: 54px; top: 9%; left: -42px;
  animation: blog-drift 95s linear infinite;
}
.blog-cloud--2 {
  width: 112px; height: 42px; top: 31%; right: -36px;
  animation: blog-drift 120s linear infinite reverse;
}
.blog-cloud--3 {
  width: 132px; height: 48px; top: 72%; left: -50px;
  animation: blog-drift 108s linear infinite;
}
@keyframes blog-drift {
  from { transform: translateX(0); }
  to   { transform: translateX(125vw); }
}

.blog-top {
  position: fixed;
  top: 18px; left: 18px; right: 18px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  pointer-events: none;
}

.blog-back,
.blog-nav {
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 4px 14px rgba(70, 80, 110, 0.16);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.blog-back {
  padding: 9px 16px;
  border-radius: 999px;
  color: #5b6478;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.2s ease;
}
.blog-back:hover { transform: translateY(-2px); background: #ffffff; }

.blog-nav {
  display: flex;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
}
.blog-nav__link {
  padding: 7px 14px;
  border-radius: 999px;
  color: #647084;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}
.blog-nav__link:hover { transform: translateY(-2px); }
.blog-nav__link.is-active {
  background: #ffffff;
  color: #e8895b;
  box-shadow: 0 3px 10px rgba(70, 80, 110, 0.14);
}

.blog-tags {
  position: fixed;
  top: 88px;
  left: 50%;
  z-index: 25;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  width: min(760px, calc(100vw - 36px));
  transform: translateX(-50%);
  transition:
    top 0.42s var(--spring),
    width 0.42s var(--spring),
    padding 0.35s ease,
    border-color 0.25s ease,
    background 0.25s ease,
    opacity 0.25s ease,
    transform 0.42s var(--spring);
}
.blog-tags.is-gathered {
  top: 96px;
  width: auto;
  padding: 7px;
  border: 2px solid rgba(255, 255, 255, 0.92);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.24);
  box-shadow: 0 8px 22px rgba(70, 80, 110, 0.16);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
/* 滚远后整体向上滑出消失。
   !important 用来压住 page-transition.css 里 .pt-ready.pt-entered
   .pt-page-piece 的 opacity:1 / transform:0 —— 那条规则比这里的
   两类选择器更深、且后加载，否则 is-hidden 完全没视觉效果。 */
.blog-tags.is-hidden {
  opacity: 0 !important;
  pointer-events: none;
  transform: translate(-50%, -70px) scale(0.94) !important;
  transition:
    opacity 0.36s ease-out,
    transform 0.44s ease-out;
}

.blog-tag {
  flex: 0 0 auto;
  padding: 8px 15px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: #667287;
  font-size: 12px;
  font-weight: 650;
  box-shadow: 0 3px 10px rgba(70, 80, 110, 0.12);
}
.blog-tag--white { color: #4f85b8; background: rgba(246, 250, 255, 0.9); }
.blog-tag--brown { color: #b6783c; background: rgba(255, 248, 239, 0.9); }

/* ---- 返回博客列表的浮动按钮 ---------------------------------
   位于左上角，初始藏起避免和顶部导航里的「我们的小窝」品牌字重叠；
   全站导航滚动隐藏(.site-nav.is-nav-hidden)后再淡入，刚好替补出现。
   离场动画(html.pt-leaving)时跟随一起淡出。 */
.blog-back-btn {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 36;
  padding: 9px 16px;
  background: rgba(255, 255, 255, 0.86);
  border-radius: 999px;
  color: #5b6478;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(70, 80, 110, 0.16);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transform: translateY(-12px);
  pointer-events: none;
  transition:
    opacity 0.36s ease,
    transform 0.36s ease,
    background 0.2s ease;
}
.site-nav.is-nav-hidden ~ .blog-back-btn {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.site-nav.is-nav-hidden ~ .blog-back-btn:hover {
  background: #ffffff;
  transform: translateY(-3px);
}
/* 跳走时，跟全站离场动画一起淡出 */
html.pt-leaving .site-nav.is-nav-hidden ~ .blog-back-btn {
  opacity: 0;
  transform: translateY(-58px) scale(0.94);
  filter: blur(10px);
  pointer-events: none;
  transition:
    opacity 0.48s ease-out,
    transform 0.48s ease-out,
    filter 0.48s ease-out;
}
@media (max-width: 620px) {
  .blog-back-btn {
    top: 12px;
    left: 12px;
    padding: 8px 13px;
    font-size: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .blog-back-btn { transition: none; }
}

.blog-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 720px) 260px;
  gap: 76px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 154px 24px 110px;
}

.article {
  min-width: 0;
  padding-top: 34px;
}

.article-head {
  margin-bottom: 58px;
}
.article-kicker {
  margin-bottom: 14px;
  color: #7f91a6;
  font-size: 13px;
  font-weight: 650;
}
.article h1 {
  max-width: 720px;
  color: var(--heading);
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.14;
  font-weight: 600;
}
.article-summary {
  margin-top: 20px;
  max-width: 650px;
  color: #647084;
  font-size: 17px;
  line-height: 1.9;
}
.article-authors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.article-author {
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
}
.article-author--white {
  background: #f6faff;
  color: var(--white-accent);
}
.article-author--brown {
  background: #fff8ef;
  color: var(--brown-accent);
}

.article-section {
  scroll-margin-top: 110px;
  margin-bottom: 56px;
  padding: 28px 0 10px;
}
.article-section h2 {
  color: var(--heading);
  font-size: 26px;
  line-height: 1.35;
  font-weight: 600;
  margin-bottom: 18px;
}
.article-section h3 {
  margin: 26px 0 12px;
  color: #4c6379;
  font-size: 20px;
  line-height: 1.42;
  font-weight: 600;
}
.article-section h4,
.article-section h5,
.article-section h6 {
  margin: 22px 0 10px;
  color: #536a80;
  line-height: 1.42;
  font-weight: 600;
}
.article-section h4 { font-size: 18px; }
.article-section h5,
.article-section h6 { font-size: 16px; }
.article-section p {
  color: #586273;
  font-size: 16px;
  line-height: 2.05;
}
.article-section p + p { margin-top: 16px; }
.article-section a {
  color: #4f85b8;
  font-weight: 650;
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 133, 184, 0.35);
}
.article-section a:hover { color: #b6783c; border-bottom-color: rgba(182, 120, 60, 0.42); }
.article-section code {
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.68);
  color: #536070;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
}
.article-section pre {
  overflow-x: auto;
  margin: 18px 0;
  padding: 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: 0 6px 18px rgba(70, 80, 110, 0.1);
}
.article-section pre code {
  display: block;
  padding: 0;
  background: transparent;
  line-height: 1.75;
  white-space: pre;
}
.article-section ul,
.article-section ol,
.article-list {
  margin: 16px 0 18px 22px;
  color: #586273;
  font-size: 16px;
  line-height: 2;
}
.article-section li + li,
.article-list li + li { margin-top: 5px; }
.article-section li::marker {
  color: #7aa6d4;
  font-weight: 600;
}
.article-section .task-list-item {
  list-style: none;
  margin-left: -22px;
}
.article-section .task-list-item input {
  margin-right: 8px;
  vertical-align: -1px;
}
.article-section blockquote,
.article-quote {
  margin: 20px 0;
  padding: 18px 20px;
  border-left: 4px solid rgba(122, 166, 212, 0.68);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.5);
  color: #5f6c7d;
  font-size: 15px;
  line-height: 1.9;
  box-shadow: 0 6px 16px rgba(70, 80, 110, 0.1);
}
.article-section blockquote p {
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}
.article-section table {
  width: 100%;
  margin: 22px 0;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 6px 18px rgba(70, 80, 110, 0.08);
}
.article-section th,
.article-section td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(110, 130, 150, 0.16);
  color: #586273;
  font-size: 15px;
  line-height: 1.7;
  text-align: left;
  vertical-align: top;
}
.article-section th {
  color: #41586d;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.42);
}
.article-section tr:last-child td { border-bottom: none; }
.article-section img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px auto;
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(70, 80, 110, 0.14);
}
.article-section hr {
  height: 1px;
  margin: 30px 0;
  border: none;
  background: linear-gradient(90deg, transparent, rgba(110, 130, 150, 0.34), transparent);
}

.quote-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}
.quote-pair__item {
  position: relative;
  min-height: 164px;
  padding: 24px 22px 20px;
  border-radius: 8px;
  color: #536070;
  font-size: 15px;
  line-height: 1.88;
  box-shadow: 0 7px 18px rgba(70, 80, 110, 0.14);
}
.quote-pair__item::before {
  content: "";
  position: absolute;
  top: -9px; left: 50%;
  width: 68px; height: 20px;
  transform: translateX(-50%) rotate(-4deg);
  border-radius: 3px;
  opacity: 0.72;
}
.quote-pair__item span {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}
.quote-pair__item--white { background: #f6faff; }
.quote-pair__item--white::before { background: rgba(122, 166, 212, 0.55); }
.quote-pair__item--white span { color: var(--white-accent); }
.quote-pair__item--brown { background: #fff8ef; }
.quote-pair__item--brown::before { background: rgba(212, 147, 86, 0.55); }
.quote-pair__item--brown span { color: var(--brown-accent); }

.toc {
  position: relative;
}
.toc__inner {
  position: sticky;
  top: 112px;
}
.toc__title {
  margin-bottom: 18px;
  color: var(--heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}
.toc__body {
  position: relative;
  padding-left: 18px;
}
.toc__track {
  position: absolute;
  left: 0; top: 3px;
  width: 3px;
  height: calc(100% - 6px);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  overflow: hidden;
}
.toc__fill {
  display: block;
  width: 100%;
  height: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--white-accent), #9fdcc5, var(--brown-accent));
  transition: height 0.12s linear;
}
.toc__list {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.toc__link {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: #7a8595;
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: color 0.18s ease, background 0.18s ease, transform 0.18s var(--spring);
}
.toc__link:hover {
  color: #4f85b8;
  transform: translateX(3px);
}
.toc__link.is-active {
  background: rgba(255, 255, 255, 0.62);
  color: #4f85b8;
  font-weight: 600;
  box-shadow: 0 3px 10px rgba(70, 80, 110, 0.1);
}

/* Detail reading layout */
.blog-shell {
  grid-template-columns: minmax(0, 760px) minmax(270px, 340px);
  gap: clamp(70px, 8vw, 130px);
  max-width: 1260px;
  padding-top: 176px;
}

.article {
  padding-top: 0;
}

.article-head {
  margin-bottom: 76px;
}

.blog-detail-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 34px;
  flex-wrap: wrap;
}

.blog-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: max-content;
  padding: 9px 15px;
  border: 1px solid rgba(150, 163, 176, 0.22);
  border-radius: 8px;
  background: rgba(218, 226, 232, 0.62);
  color: rgba(54, 62, 72, 0.72);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(74, 88, 104, 0.08);
  -webkit-backdrop-filter: blur(10px) saturate(1.12);
          backdrop-filter: blur(10px) saturate(1.12);
  transition: transform 0.16s ease, background 0.16s ease, color 0.16s ease;
}

.blog-detail-back::before {
  content: "‹";
  font-size: 22px;
  line-height: 0.6;
}

.blog-detail-back:hover {
  transform: translateY(-1px);
  background: rgba(236, 241, 245, 0.82);
  color: rgba(32, 42, 54, 0.9);
}

.blog-detail-delete button {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 9px 15px;
  border: 1px solid rgba(185, 105, 105, 0.2);
  border-radius: 8px;
  background: rgba(255, 247, 247, 0.7);
  color: rgba(150, 70, 70, 0.86);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(105, 70, 74, 0.08);
  -webkit-backdrop-filter: blur(10px) saturate(1.08);
          backdrop-filter: blur(10px) saturate(1.08);
  transition: transform 0.16s ease, background 0.16s ease, color 0.16s ease;
}

.blog-detail-delete button:hover {
  transform: translateY(-1px);
  background: rgba(255, 236, 236, 0.9);
  color: rgba(120, 52, 52, 0.96);
}

.blog-tags {
  position: static;
  width: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 20px;
  margin-bottom: 28px;
  transform: none;
  transition: none;
}

.blog-tags.is-gathered,
.blog-tags.is-hidden {
  position: static;
  width: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  opacity: 1 !important;
  transform: none !important;
  pointer-events: auto;
  -webkit-backdrop-filter: none;
          backdrop-filter: none;
}

.blog-tag,
.blog-tag--white,
.blog-tag--brown {
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: rgba(59, 69, 82, 0.72);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  box-shadow: none;
}

.article h1 {
  max-width: 820px;
  color: #111820;
  font-size: clamp(36px, 4.8vw, 48px);
  line-height: 1.2;
  font-weight: 600;
}

.article-summary {
  max-width: 760px;
  margin-top: 16px;
  color: rgba(59, 69, 82, 0.72);
  font-size: 16px;
  font-style: italic;
  line-height: 1.7;
}

.toc__inner {
  top: 154px;
}

.toc__title {
  margin-bottom: 28px;
  color: #111820;
  font-size: 22px;
  line-height: 1.15;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0;
}

.toc__body {
  padding-left: 0;
}

.toc__track {
  left: 0;
  top: 8px;
  width: 3px;
  background: rgba(160, 170, 182, 0.25);
  overflow: visible;
}

.toc__fill {
  height: 0;
  background: linear-gradient(
    180deg,
    var(--white-accent) 0%,
    #76bfd2 20%,
    #8ed8c7 42%,
    #a7dca8 60%,
    #d8c77d 78%,
    var(--brown-accent) 100%
  );
  transform: translateY(0);
  transition: height 0.16s ease, transform 0.16s ease;
}

.toc__list {
  gap: 0;
  padding-left: 28px;
}

.toc__link {
  position: relative;
  margin-left: -28px;
  padding: 7px 12px 7px 28px;
  border-radius: 0;
  color: rgba(42, 49, 57, 0.72);
  font-size: 14px;
  line-height: 1.45;
  font-weight: 500;
  transition: color 0.16s ease, background 0.16s ease, border-radius 0.16s ease;
}

.toc__link::before {
  content: none;
}

.toc__link[data-level="3"] {
  padding-left: 46px;
}

.toc__link[data-level="4"] {
  padding-left: 64px;
  font-size: 13px;
}

.toc__link:hover,
.toc__link.is-visible {
  color: #4e83a2;
}

.toc__link.is-visible {
  background: rgba(255, 255, 255, 0.44);
  color: #4e83a2;
  font-weight: 600;
  box-shadow: none;
}

.toc__link.is-visible-first {
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
}

.toc__link.is-visible-last {
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
}

.toc__link.is-active {
  color: #4e83a2;
  font-weight: 650;
}

@media (max-width: 940px) {
  .blog-shell {
    display: block;
    max-width: 760px;
    padding-top: 146px;
  }
  .toc { display: none; }
}

@media (max-width: 620px) {
  .blog-top {
    top: 12px; left: 12px; right: 12px;
    align-items: flex-start;
  }
  .blog-nav {
    max-width: 58vw;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .blog-nav::-webkit-scrollbar { display: none; }
  .blog-nav__link {
    flex: 0 0 auto;
    padding: 7px 11px;
    font-size: 12px;
  }
  .blog-back { padding: 8px 12px; font-size: 12px; }
  .blog-tags {
    top: 78px;
    gap: 7px;
  }
  .blog-tags.is-gathered {
    top: 76px;
    max-width: calc(100vw - 24px);
    overflow-x: auto;
    justify-content: flex-start;
    scrollbar-width: none;
  }
  .blog-tags.is-gathered::-webkit-scrollbar { display: none; }
  .blog-tag {
    padding: 7px 11px;
    font-size: 11px;
  }
  .blog-shell {
    padding: 138px 18px 82px;
  }
  .article { padding-top: 20px; }
  .article h1 { font-size: 32px; }
  .article-summary { font-size: 15px; }
  .article-section {
    margin-bottom: 42px;
    padding-top: 18px;
  }
  .article-section h2 { font-size: 22px; }
  .article-section p { font-size: 15px; line-height: 1.95; }
  .quote-pair { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .blog-cloud { animation: none; }
  .blog-tags,
  .blog-back,
  .blog-nav__link,
  .toc__fill,
  .toc__link { transition: none; }
}