:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --ink: #1c2333;
  --ink-2: #5b6478;
  --ink-3: #8b93a7;
  --line: #e7ebf3;
  --accent: #4f6ef7;
  --accent-2: #06b6d4;
  --grad: linear-gradient(135deg, #4f6ef7 0%, #06b6d4 100%);
  --r-lg: 22px; --r-md: 16px; --r-sm: 12px;
  --mono: "JetBrains Mono", "SF Mono", Consolas, "Courier New", monospace;
  --shadow: 0 18px 50px -22px rgba(31, 45, 90, .18);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.85; -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 780px; margin: 0 auto; padding: 28px 22px 64px; }

/* ---------- 顶栏 ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 30px; }
.topbar .brand { display: flex; align-items: center; gap: 11px; font-weight: 600; text-decoration: none; color: var(--ink); }
.topbar .mark { width: 38px; height: 38px; border-radius: 12px; background: var(--grad); display: grid; place-items: center; color: #fff; font-family: var(--mono); font-weight: 700; box-shadow: 0 8px 20px -8px rgba(79,110,247,.55); }
.topbar .brand small { display: block; font-weight: 400; color: var(--ink-3); font-size: 11px; font-family: var(--mono); }
.topbar .back { font-size: 13.5px; color: var(--accent); text-decoration: none; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); transition: .2s; }
.topbar .back:hover { border-color: var(--accent); transform: translateY(-1px); }

/* ---------- 文章头 ---------- */
.tag { display: inline-block; font-family: var(--mono); font-size: 12px; color: var(--accent); background: rgba(79,110,247,.08); border: 1px solid rgba(79,110,247,.2); padding: 5px 14px; border-radius: 999px; margin-bottom: 14px; }
.article h1 { font-size: 30px; line-height: 1.3; letter-spacing: .3px; }
.meta { color: var(--ink-3); font-size: 13px; font-family: var(--mono); margin: 10px 0 26px; }
.lead { font-size: 16px; color: var(--ink-2); padding: 16px 18px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-md); box-shadow: var(--shadow); margin-bottom: 8px; }

/* ---------- 正文排版 ---------- */
.article h2 { font-size: 21px; margin: 36px 0 12px; }
.article h2::before { content: "## "; color: var(--accent); font-family: var(--mono); font-size: 15px; }
.article h3 { font-size: 17px; margin: 26px 0 10px; }
.article p { color: var(--ink-2); margin: 12px 0; font-size: 15.5px; }
.article ul, .article ol { color: var(--ink-2); margin: 12px 0 12px 22px; font-size: 15px; }
.article li { margin: 6px 0; }
.article strong { color: var(--ink); }
.article code { font-family: var(--mono); font-size: 13.5px; background: #eef1f8; border: 1px solid var(--line); padding: 1px 7px; border-radius: 6px; color: var(--accent); }
.article pre { background: #1c2333; color: #e7ebf3; padding: 16px 18px; border-radius: 14px; overflow: auto; font-family: var(--mono); font-size: 13px; margin: 16px 0; }
.article pre code { background: none; border: none; color: inherit; padding: 0; }
.article blockquote { border-left: 3px solid var(--accent); background: rgba(79,110,247,.06); padding: 12px 16px; border-radius: 0 12px 12px 0; color: var(--ink-2); margin: 16px 0; }
.article a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(79,110,247,.3); }
.article a:hover { border-bottom-color: var(--accent); }
.article img { max-width: 100%; border-radius: var(--r-md); border: 1px solid var(--line); margin: 16px 0; }

/* ---------- 草稿提示 ---------- */
.note { margin-top: 40px; padding: 14px 16px; border: 1px dashed var(--line); border-radius: 12px; background: var(--card); color: var(--ink-3); font-size: 13px; }
.note b { color: var(--ink-2); }

footer { margin-top: 48px; text-align: center; color: var(--ink-3); font-size: 12.5px; }
footer a { color: var(--accent); text-decoration: none; }
footer .mono { font-family: var(--mono); }

@media (max-width: 720px) {
  .article h1 { font-size: 24px; }
  .wrap { padding: 22px 16px 48px; }
}

/* ---------- 图片画廊（照片墙，保持原始比例） ---------- */
.gallery { columns: 3 190px; column-gap: 10px; margin: 22px 0 6px; }
.gallery img {
  width: 100%; height: auto; display: block; break-inside: avoid;
  margin: 0 0 10px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--card);
}
.gallery-cap { text-align: center; color: var(--ink-3); font-size: 12.5px; font-family: var(--mono); margin: 4px 0 0; }
@media (max-width: 720px) { .gallery { columns: 2 130px; } }

/* ---------- 沉浸式滚屏记录（.story） ---------- */
.story-hero { position: relative; border-radius: var(--r-lg); overflow: hidden; margin: 4px 0 8px; box-shadow: var(--shadow); }
.story-hero > img { width: 100%; height: 430px; object-fit: cover; display: block; margin: 0; border: 0; }
.story-hero .ov {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 28px 26px; background: linear-gradient(180deg, rgba(16,22,36,0) 32%, rgba(16,22,36,.80) 100%);
}
.story-hero .k { color: rgba(255,255,255,.82); font-family: var(--mono); font-size: 12px; letter-spacing: .1em; margin-bottom: 10px; }
.story-hero h1 { color: #fff; font-size: 30px; line-height: 1.25; letter-spacing: .5px; }
.story-hero .sub { color: rgba(255,255,255,.85); font-size: 13.5px; margin-top: 8px; font-family: var(--mono); }

.story-kicker { text-align: center; font-family: var(--mono); font-size: 12px; letter-spacing: .18em; color: var(--accent); margin: 46px 0 4px; }
.story-kicker::before, .story-kicker::after { content: "—"; color: var(--line); margin: 0 14px; }

.story-text { max-width: 620px; margin: 22px auto 30px; }
.story-text p { font-size: 16.5px; line-height: 2.15; color: var(--ink-2); margin: 0 0 16px; }

.story-fig { margin: 24px 0; }
.story-fig img { width: 100%; height: auto; display: block; border-radius: 16px; border: 1px solid var(--line); margin: 0; }
.story-fig figcaption { text-align: center; font-family: var(--mono); font-size: 12px; color: var(--ink-3); margin-top: 10px; }

.story-pull { max-width: 660px; margin: 44px auto 40px; text-align: center; }
.story-pull .q { display: block; font-family: var(--mono); font-size: 30px; line-height: 1; color: var(--accent); margin-bottom: 14px; }
.story-pull p { font-size: 19px; line-height: 2.1; color: var(--ink); }

.story-end { text-align: center; font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); margin: 40px 0 0; }

@media (max-width: 720px) {
  .story-hero > img { height: 320px; }
  .story-hero h1 { font-size: 23px; }
  .story-pull p { font-size: 17px; }
}

/* ---------- 拍立得相册（.album） ---------- */
.album-page {
  background: linear-gradient(180deg, #faf7f0 0%, #f6f1e6 100%);
  border: 1px solid #ece4d6; border-radius: var(--r-lg);
  padding: 30px 22px 34px; box-shadow: var(--shadow); margin: 6px 0;
}
.album-head { text-align: center; margin-bottom: 22px; }
.album-head .k { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; color: #b08b5a; margin-bottom: 10px; }
.album-head h1 { font-size: 30px; letter-spacing: .5px; color: #3a3327; }
.album-head .sub { color: #8a8175; font-size: 13.5px; margin-top: 8px; font-family: var(--mono); }

.note-card {
  position: relative; max-width: 560px; margin: 22px auto; background: #fffdf7;
  border: 1px solid #ece4d6; border-radius: 10px; padding: 20px 22px;
  color: #5f5749; font-size: 15.5px; line-height: 2;
  box-shadow: 0 10px 22px -18px rgba(90,70,40,.55);
}
.note-card::before {
  content: ""; position: absolute; top: -9px; left: 50%; transform: translateX(-50%) rotate(-2deg);
  width: 76px; height: 18px; background: rgba(214,196,150,.45);
  border: 1px solid rgba(190,170,120,.5); border-radius: 2px;
}
.note-card p { margin: 0 0 12px; color: #5f5749; font-size: 15.5px; line-height: 2; }
.note-card p:last-child { margin: 0; }

.album { display: flex; flex-wrap: wrap; justify-content: center; gap: 30px 22px; margin-top: 26px; }
.polaroid {
  width: 200px; background: #fff; padding: 12px 12px 0; border-radius: 3px;
  box-shadow: 0 12px 24px -14px rgba(40,40,60,.45), 0 2px 3px rgba(40,40,60,.08);
  transition: transform .3s ease, box-shadow .3s ease;
}
.polaroid img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; display: block; border-radius: 2px; background: #eceff5; }
.polaroid .no { text-align: center; font-family: var(--mono); font-size: 11.5px; color: #b6ad9d; padding: 9px 0 12px; letter-spacing: .1em; }
.polaroid:nth-child(4n)   { transform: rotate(-2.6deg); }
.polaroid:nth-child(4n+1) { transform: rotate(1.9deg); }
.polaroid:nth-child(4n+2) { transform: rotate(-1.1deg); }
.polaroid:nth-child(4n+3) { transform: rotate(2.4deg); }
.polaroid:hover { transform: rotate(0deg) scale(1.06); box-shadow: 0 22px 40px -16px rgba(40,40,60,.5); z-index: 3; }

.album-end { text-align: center; font-family: var(--mono); font-size: 12.5px; color: #a79c89; margin: 30px 0 0; }

@media (max-width: 720px) {
  .polaroid { width: 148px; }
  .album { gap: 22px 14px; }
  .album-head h1 { font-size: 23px; }
}

/* ---------- 版式切换条（对比用） ---------- */
.variant-bar { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin: 0 0 18px; }
.variant-bar a {
  font-family: var(--mono); font-size: 12.5px; padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2); text-decoration: none; transition: .2s;
}
.variant-bar a:hover { border-color: var(--accent); color: var(--accent); }
.variant-bar a.on { background: var(--grad); color: #fff; border-color: transparent; }

/* ---------- 日记时间轴（.diary） ---------- */
.diary { margin: 10px 0; }
.diary-entry { position: relative; padding: 0 0 30px 32px; margin-left: 6px; border-left: 2px solid var(--line); }
.diary-entry:last-child { border-left-color: transparent; padding-bottom: 0; }
.diary-entry::before {
  content: ""; position: absolute; left: -9px; top: 3px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--card); border: 3px solid var(--accent); box-shadow: 0 0 0 4px rgba(79,110,247,.12);
}
.diary-time { font-family: var(--mono); font-size: 13px; color: var(--accent); letter-spacing: .04em; margin-bottom: 5px; }
.diary-entry h3 { font-size: 17px; margin-bottom: 8px; }
.diary-entry .dtext { color: var(--ink-2); font-size: 15px; line-height: 1.95; margin: 0 0 14px; }
.diary-photos { display: flex; flex-wrap: wrap; gap: 10px; }
.diary-photos img { width: 150px; height: 188px; object-fit: cover; border-radius: 12px; border: 1px solid var(--line); display: block; }

@media (max-width: 720px) {
  .diary-photos img { width: 112px; height: 140px; }
}