:root {
  --paper: #efe7d5;
  --paper-2: #f8f2e4;
  --ink: #1a1712;
  --ink-soft: #514b3e;
  --muted: #8b8170;
  --line: #d4c8b0;
  --red: #b23a2b;
  --red-soft: #e2795f;
  --font-display: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC",
    "Source Han Serif CN", "SimSun", Georgia, serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "Cascadia Mono", "SFMono-Regular",
    Consolas, "Liberation Mono", monospace;
  --gutter: clamp(20px, 4.5vw, 68px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--paper);
  /* 很淡的横线，像稿纸一样给页面一点纸质感 */
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0 31px,
    rgba(26, 23, 18, 0.045) 31px 32px
  );
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 纸张颗粒，盖在最上层但不拦截鼠标 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  opacity: 0.16;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

::selection {
  background: var(--ink);
  color: var(--paper-2);
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px dashed var(--red);
  outline-offset: 4px;
}

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

.page {
  max-width: 1520px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 页头 ---------- */

.masthead {
  padding-top: clamp(32px, 5.5vw, 76px);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.eyebrow .seal-mini {
  width: 9px;
  height: 9px;
  background: var(--red);
  flex: none;
}

.eyebrow .rule {
  flex: 1;
  height: 1px;
  background: var(--ink);
  opacity: 0.3;
}

.masthead-main {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: end;
  margin-top: clamp(22px, 4vw, 46px);
}

.title {
  display: flex;
  align-items: flex-end;
  gap: clamp(6px, 1.2vw, 18px);
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(58px, 10.5vw, 148px);
  line-height: 0.94;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.title .outlined {
  color: var(--ink);
}

@supports ((-webkit-text-stroke: 1px black) or (text-stroke: 1px black)) {
  .title .outlined {
    color: transparent;
    -webkit-text-stroke: 2px var(--ink);
  }
}

.title .seal {
  display: grid;
  place-items: center;
  width: clamp(34px, 3.6vw, 52px);
  height: clamp(34px, 3.6vw, 52px);
  margin-bottom: clamp(6px, 1vw, 16px);
  margin-left: clamp(2px, 0.8vw, 12px);
  background: var(--red);
  color: var(--paper-2);
  font-size: clamp(17px, 2.2vw, 27px);
  line-height: 1;
  letter-spacing: 0;
  transform: rotate(-5deg);
  box-shadow: 2px 2px 0 rgba(26, 23, 18, 0.22);
}

.intro {
  align-self: end;
  padding-bottom: 6px;
}

.lede {
  margin: 0 0 20px;
  padding-top: 16px;
  border-top: 1px solid var(--ink);
  max-width: 37ch;
  font-size: clamp(14.5px, 1.1vw, 16px);
  line-height: 1.85;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.lede strong {
  color: var(--ink);
  font-weight: 600;
}

.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  color: var(--muted);
}

/* ---------- 吸顶筛选栏 ---------- */

.controls {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px 24px;
  margin-top: clamp(30px, 4.5vw, 62px);
  margin-inline: calc(var(--gutter) * -1);
  padding: 12px var(--gutter);
  background: rgba(239, 231, 213, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 5px 11px;
  border: 1px solid var(--ink);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.chip .n {
  font-size: 9.5px;
  opacity: 0.55;
}

.chip:hover {
  background: rgba(26, 23, 18, 0.08);
}

.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper-2);
}

.search {
  position: relative;
  display: flex;
  align-items: center;
}

.search input {
  width: 230px;
  padding: 7px 28px 7px 2px;
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  outline: none;
  transition: border-color 0.2s ease;
}

.search input:focus {
  border-bottom-color: var(--red);
}

.search input::placeholder {
  color: var(--muted);
}

.search kbd {
  position: absolute;
  right: 2px;
  padding: 0 5px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.7;
  color: var(--muted);
  pointer-events: none;
}

.search input:focus + kbd {
  opacity: 0;
}

.notice {
  margin: 22px 0 0;
  padding: 10px 14px;
  border-left: 3px solid var(--red);
  background: rgba(178, 58, 43, 0.06);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.9;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}

/* ---------- 作品列表 ---------- */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(30px, 4vw, 52px);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.3em;
}

.section-head h2::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 12px;
  background: var(--red);
  vertical-align: 2px;
}

.section-head span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(16px, 2vw, 28px);
  margin-top: clamp(20px, 2.6vw, 32px);
}

/* 5 张一循环的栏宽节奏：7 + 5 / 4 + 4 + 4，避免整齐划一的网格 */
.card-wrap {
  grid-column: span 4;
  /* 默认可见，动画只做入场修饰；动画失效时内容也不会消失 */
  animation: card-in 0.65s cubic-bezier(0.2, 0.7, 0.2, 1) backwards;
  animation-delay: var(--d, 0ms);
}

.grid.steady .card-wrap {
  animation: none;
}

.card-wrap:nth-child(5n + 1) {
  grid-column: span 7;
}

.card-wrap:nth-child(5n + 2) {
  grid-column: span 5;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.card {
  --card-bg: var(--paper-2);
  --card-fg: var(--ink);
  --card-soft: var(--ink-soft);
  --card-line: var(--line);
  --accent: var(--red);
  --accent-light: var(--red-soft);
  --art-bg: var(--paper);
  --art-bg: color-mix(in srgb, var(--accent) 7%, var(--paper));
  --art-fg: var(--accent);

  display: flex;
  flex-direction: column;
  height: 100%;
  padding: clamp(16px, 1.6vw, 24px);
  background: var(--card-bg);
  color: var(--card-fg);
  border: 1px solid var(--ink);
  box-shadow: 5px 5px 0 rgba(26, 23, 18, 0.09);
  text-decoration: none;
  transition: background 0.35s ease, color 0.35s ease, transform 0.35s cubic-bezier(0.2, 0.7, 0.2, 1),
    box-shadow 0.35s ease;
}

.card:hover,
.card:focus-visible {
  --card-bg: var(--ink);
  --card-fg: var(--paper-2);
  --card-soft: rgba(248, 242, 228, 0.72);
  --card-line: rgba(248, 242, 228, 0.22);
  --art-bg: #221e18;
  --art-fg: var(--accent-light);

  transform: translate(-4px, -4px);
  box-shadow: 9px 9px 0 var(--red);
}

.card:active {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--red);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.no {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--card-soft);
}

.pin {
  width: 6px;
  height: 6px;
  background: var(--accent);
  transition: background 0.35s ease;
}

.card:hover .pin,
.card:focus-visible .pin {
  background: var(--accent-light);
}

.stamp {
  padding: 2px 7px 2px 9px;
  border: 1px solid currentColor;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  line-height: 1.5;
  transform: rotate(2deg);
  transition: color 0.35s ease;
}

.card:hover .stamp,
.card:focus-visible .stamp {
  color: var(--accent-light);
}

.art {
  display: flex;
  height: clamp(148px, 15vw, 196px);
  margin: 14px 0 18px;
  overflow: hidden;
  background: var(--art-bg);
  color: var(--art-fg);
  border: 1px solid var(--card-line);
  transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease;
}

.art svg {
  display: block;
  width: 100%;
  height: 100%;
}

.card-wrap:nth-child(5n + 1) .art {
  height: clamp(190px, 21vw, 268px);
}

.card h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(21px, 1.9vw, 29px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.card-wrap:nth-child(5n + 1) h2 {
  font-size: clamp(25px, 2.5vw, 38px);
}

.desc {
  margin: 0 0 20px;
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--card-soft);
  text-wrap: pretty;
}

.card-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 13px;
  border-top: 1px solid var(--card-line);
}

.tags,
.date {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--card-soft);
}

.date {
  margin-top: 4px;
}

.dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--red);
  vertical-align: 1px;
}

.go {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  white-space: nowrap;
  transition: border-color 0.25s ease;
}

.card:hover .go,
.card:focus-visible .go {
  border-bottom-color: currentColor;
}

.arrow {
  font-size: 13px;
  line-height: 1;
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.card:hover .arrow,
.card:focus-visible .arrow {
  transform: translate(3px, -3px);
}

/* ---------- 空状态 ---------- */

.empty {
  padding: clamp(56px, 8vw, 96px) 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.empty strong {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  color: var(--ink);
  letter-spacing: 0.08em;
}

.empty button {
  padding: 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: none;
  color: var(--red);
  cursor: pointer;
}

/* ---------- 页脚 ---------- */

.footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: clamp(64px, 9vw, 130px);
  padding: 30px 0 42px;
  border-top: 1px solid var(--ink);
}

.big {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(30px, 4.2vw, 56px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.02em;
}

.big .red {
  color: var(--red);
}

.footer-note {
  margin: 0;
  font-size: 12.5px;
  color: var(--muted);
}

.footer-side {
  text-align: right;
}

.footer-side .meta {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.top-link {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.top-link:hover {
  border-bottom-color: currentColor;
  color: var(--red);
}

/* ---------- 侧边竖排小字 ---------- */

.side-note {
  position: fixed;
  top: 50%;
  right: 14px;
  z-index: 5;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.4em;
  color: var(--muted);
  pointer-events: none;
}

/* ---------- 提示条 ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 9500;
  max-width: min(520px, calc(100vw - 40px));
  padding: 12px 18px;
  border-left: 3px solid var(--red);
  background: var(--ink);
  color: var(--paper-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translate(-50%, 14px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 入场动画 ---------- */

.rise {
  opacity: 0;
  animation: rise-in 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
  animation-delay: var(--d, 0ms);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1100px) {
  .card-wrap,
  .card-wrap:nth-child(5n + 1),
  .card-wrap:nth-child(5n + 2) {
    grid-column: span 6;
  }

  .card-wrap:nth-child(5n + 1) .art {
    height: clamp(158px, 20vw, 220px);
  }

  .card-wrap:nth-child(5n + 1) h2 {
    font-size: clamp(21px, 2.6vw, 30px);
  }

  .masthead-main {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .lede {
    max-width: 54ch;
  }

  .side-note {
    display: none;
  }
}

@media (max-width: 680px) {
  body {
    font-size: 14.5px;
  }

  .card-wrap,
  .card-wrap:nth-child(5n + 1),
  .card-wrap:nth-child(5n + 2) {
    grid-column: span 12;
  }

  .title {
    font-size: clamp(52px, 16vw, 84px);
  }

  .title .seal {
    margin-bottom: 8px;
  }

  .controls {
    align-items: stretch;
  }

  .filters {
    gap: 5px;
  }

  .chip {
    padding: 4px 9px;
  }

  .search {
    width: 100%;
  }

  .search input {
    width: 100%;
  }

  .section-head h2 {
    font-size: 16px;
    letter-spacing: 0.22em;
  }

  .footer-side {
    text-align: left;
  }
}

/* ---------- 减少动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }

  .rise,
  .card-wrap {
    opacity: 1;
    transform: none;
  }

  .card:hover,
  .card:focus-visible,
  .card:active {
    transform: none;
  }
}