:root {
  --canvas: #faf8f3;
  --canvas-deep: #f0ebe3;
  --ink: #1a1c18;
  --body: #2f342f;
  --muted: #667066;
  --hairline: #ddd4c8;
  /* 印泥赭红：更深、偏赭，避免橘红 */
  --accent: #922b21;
  --accent-deep: #7a221a;
  --measure: 39rem;
  --pad-x: clamp(1.25rem, 4.5vw, 4rem);
  --display: "Bodoni Moda", "Didot", "Times New Roman", serif;
  /* 英文正文 / UI：Source Sans 3（OFL，可免费商用）。品牌展示仍用 Bodoni */
  --serif: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif-sc: "FlyFlowerSong", "飞花宋体", "Songti SC", "Noto Serif SC", serif;
  --brand-zh: "Alimama DaoLiTi", "阿里妈妈刀隶体", var(--serif-sc);
  --sans: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  position: relative;
  isolation: isolate;
  /* 偏白宣纸平铺；墨气由 .atmosphere 多层溶入 */
  background-color: #faf8f3;
  background-image: url("/assets/xuan-paper-light.png");
  background-size: 980px;
  background-repeat: repeat;
  background-position: 0 0;
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: clamp(1.0625rem, 0.3vw + 1rem, 1.175rem);
  line-height: 1.62;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

/*
  氛围层：canvas 每次载入随机生成墨气（笔骨 + 湿晕 + 纤维）
*/
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  isolation: isolate;
}

.topbar,
main,
.site-footer {
  position: relative;
  z-index: 2;
}

.atm-canvas {
  display: block;
  width: 100%;
  height: 100%;
  /* 新墨法本身已控留白，可略提高存在感 */
  opacity: 0.82;
  mix-blend-mode: multiply;
}

@media (max-width: 720px) {
  body {
    background-attachment: scroll;
    background-size: 820px;
  }

  .atm-canvas {
    opacity: 0.72;
  }
}

a {
  color: inherit;
}

.c-mark {
  color: var(--accent);
  font-weight: inherit;
  font-style: inherit;
}

.brand-display-en {
  display: block;
  font-family: var(--display);
  font-size: clamp(3.6rem, 11vw, 7.25rem);
  font-weight: 500;
  line-height: 0.92;
  letter-spacing: 0.08em;
  text-indent: 0.08em;
  text-transform: uppercase;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem var(--pad-x);
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, #fffcf7 78%, transparent),
      color-mix(in srgb, var(--canvas) 62%, transparent)
    );
  backdrop-filter: blur(10px) saturate(1.05);
  -webkit-backdrop-filter: blur(10px) saturate(1.05);
  border-bottom: none;
}

.brand {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: none;
  position: relative;
}

.brand-lockup {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  width: max-content;
  gap: 0.18rem;
  position: relative;
}

.brand-en {
  display: block;
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-indent: 0.12em;
  text-transform: uppercase;
  line-height: 1;
  width: max-content;
}

.brand-zh {
  /* 不参与撑开锁排宽度，强制与 COLERE 同宽两端对齐 */
  display: flex;
  justify-content: space-between;
  width: 0;
  min-width: 100%;
  font-family: var(--brand-zh);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.15;
  color: var(--ink);
}

.brand-zh > span {
  display: inline-block;
}

/* 第三行标语与 COLERE / 化成社 同宽两端；斜体与主口号一致 */
.brand-tagline {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  width: 0;
  min-width: 100%;
  margin-top: 0.28rem;
  font-family: var(--display);
  font-style: italic;
  /* 略小于四词自然总宽，才有空隙可被 space-between 拉开 */
  font-size: 0.48rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.15;
  color: var(--muted);
  column-gap: 0.2em;
}

.brand-tagline-word {
  flex: 0 0 auto;
  white-space: nowrap;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.85rem 1.25rem;
}

.topnav a {
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--accent-deep);
  outline: none;
}

main {
  width: min(100%, 70rem);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5rem) var(--pad-x) clamp(3.5rem, 9vw, 6rem);
}

.about {
  max-width: 56rem;
  padding-bottom: clamp(3rem, 8vw, 5rem);
  /* 去掉底部分割线，让板块自然衔接 */
}

.eyebrow {
  margin: 0 0 1.35rem;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand-display {
  margin: 0;
  display: grid;
  gap: 0.45rem;
  width: max-content;
  max-width: 100%;
  position: relative;
  cursor: none;
}

/* 悬停时字下湿墨光晕：跟随指针 */
.brand-display::before {
  content: "";
  position: absolute;
  left: var(--ink-x, 50%);
  top: var(--ink-y, 50%);
  width: clamp(7rem, 22vw, 12rem);
  height: clamp(5rem, 16vw, 9rem);
  translate: -50% -45%;
  border-radius: 42% 58% 55% 45% / 48% 42% 58% 52%;
  background:
    radial-gradient(
      ellipse 55% 50% at 48% 46%,
      rgba(26, 28, 24, 0.34) 0%,
      rgba(26, 28, 24, 0.14) 38%,
      transparent 72%
    ),
    radial-gradient(
      ellipse 80% 70% at 52% 50%,
      rgba(26, 28, 24, 0.12) 0%,
      transparent 68%
    );
  opacity: 0;
  filter: blur(10px);
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.35s ease;
}

.brand-display.is-inking::before {
  opacity: 1;
}

.brand-display > * {
  position: relative;
  z-index: 1;
}

.brand {
  cursor: none;
}

.brand-display-zh {
  display: flex;
  justify-content: space-between;
  width: 100%;
  font-family: var(--brand-zh);
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
}

.brand-display-zh > span {
  display: inline-block;
}

.accent-rule {
  display: none;
}

.origin {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  margin: clamp(1.6rem, 3.5vw, 2.4rem) 0 1.35rem;
  align-items: stretch;
}

@media (min-width: 780px) {
  .origin {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(1.5rem, 3.5vw, 2.4rem);
  }
}

.origin-card {
  margin: 0;
  /* 手撕毛边会吃边：安全区内边距；纹理已去掉外圈双层 */
  padding: clamp(2.6rem, 5.5vw, 3.4rem) clamp(2.4rem, 5vw, 3.1rem);
  border: none;
  box-shadow: none;
  background-color: #ebe3d4;
  background-image: url("/assets/torn-tex-a.png");
  background-size: cover;
  background-position: center;
  -webkit-mask-image: url("/assets/torn-mask-a.png");
  mask-image: url("/assets/torn-mask-a.png");
  -webkit-mask-size: 100% 100%;
  mask-size: 100% 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  /* 轻阴影即可，过重会像多描一圈 */
  filter: drop-shadow(0 4px 10px color-mix(in srgb, var(--ink) 5%, transparent));
}

.origin-card--zh {
  background-image: url("/assets/torn-tex-b.png");
  -webkit-mask-image: url("/assets/torn-mask-b.png");
  mask-image: url("/assets/torn-mask-b.png");
}

.origin-script {
  margin: 0 0 0.7rem;
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.origin-card--zh .origin-script {
  letter-spacing: 0.12em;
}

html[lang="zh-Hans"] .origin-card--zh .origin-script {
  letter-spacing: 0.28em;
  text-transform: none;
}

.origin-name {
  margin: 0 0 0.85rem;
  font-family: var(--display);
  font-size: clamp(1.55rem, 3vw, 2rem);
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.1;
}

.origin-name--zh {
  font-family: var(--brand-zh);
  letter-spacing: 0.35em;
  text-indent: 0.15em;
}

.origin-body {
  margin: 0;
  color: var(--body);
  font-family: var(--serif);
  font-size: 0.98em;
  line-height: 1.55;
}

html[lang="zh-Hans"] .origin-body {
  font-family: var(--serif-sc);
}

.origin-body--en {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.92em;
}

.etymology-join {
  margin: 0 0 clamp(1.85rem, 4.5vw, 2.5rem);
  max-width: 36rem;
  color: var(--ink);
  font-size: 1.02em;
  line-height: 1.55;
}

.etymology-join strong {
  font-weight: 600;
}

/* 避免「照料……」一类短语被拆到行末 */
.phrase-keep {
  white-space: nowrap;
}

@media (max-width: 520px) {
  .phrase-keep {
    white-space: normal;
  }
}

.slogan {
  margin: 1.15rem 0 0;
  font-family: var(--display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 500;
  font-style: italic;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.slogan--inline {
  max-width: none;
  white-space: normal;
}

@media (min-width: 720px) {
  .slogan--inline {
    white-space: nowrap;
  }
}

.manifesto-section {
  padding-top: clamp(3rem, 8vw, 5rem);
}

.section-label {
  margin: 0 0 clamp(1.35rem, 3vw, 1.85rem);
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.manifesto {
  max-width: var(--measure);
}

.manifesto p {
  margin: 0 0 1.4em;
  color: var(--body);
}

.lead {
  margin-bottom: 1.7em !important;
  color: var(--ink) !important;
  /* 与 manifesto 正文同一字体；仅加深墨色作开篇区分 */
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  letter-spacing: inherit;
}

.closing {
  color: var(--ink) !important;
}

.contact {
  display: grid;
  gap: 1.1rem;
  margin-top: clamp(3rem, 8vw, 5rem);
  padding: clamp(2.8rem, 6vw, 3.6rem) clamp(2.6rem, 5.5vw, 3.4rem);
  background-color: #e8dfd0;
  background-image: url("/assets/torn-tex-contact.png");
  background-size: cover;
  background-position: center;
  border: none;
  border-radius: 0;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-mask-image: url("/assets/torn-mask-contact.png");
  mask-image: url("/assets/torn-mask-contact.png");
  -webkit-mask-size: 100% 100%;
  mask-size: 100% 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  filter: drop-shadow(0 4px 10px color-mix(in srgb, var(--ink) 5%, transparent));
}

@media (min-width: 720px) {
  .contact {
    max-width: 42rem;
  }
}

.contact h2 {
  margin: 0 0 0.45rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--display);
  font-size: clamp(1.7rem, 2.6vw, 2.2rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.contact-icon {
  display: inline-flex;
  width: 1.2em;
  height: 1.2em;
  flex-shrink: 0;
  color: var(--accent-deep);
  opacity: 0.95;
  transform: translateY(0.08em);
}

.contact-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.contact-note {
  margin: 0;
  max-width: 28rem;
  font-size: 0.98rem;
  line-height: 1.55;
  /* 在手撕纸纹理上需比 --muted 更深，保证易读 */
  color: var(--body);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.15rem;
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.lang-switch a {
  text-decoration: none;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0.06em;
}

.lang-switch a[aria-current="page"] {
  color: var(--ink);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 70%, transparent);
  padding-bottom: 0.05rem;
}

.lang-switch a:hover,
.lang-switch a:focus-visible {
  color: var(--accent-deep);
  outline: none;
}

.lang-switch-sep {
  opacity: 0.45;
  user-select: none;
}

.email {
  justify-self: start;
  margin-top: 0.35rem;
  font-family: var(--sans);
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1.5px solid var(--accent);
  padding-bottom: 0.12rem;
  transition: color 0.2s ease;
}

.email:hover,
.email:focus-visible {
  color: var(--accent-deep);
  outline: none;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.25rem;
  width: min(100%, 70rem);
  margin: 0 auto;
  padding: 0 var(--pad-x) clamp(2.5rem, 6vw, 4rem);
}

.footer-brand {
  margin: 0;
  display: inline-block;
}

/* 页脚锁排放大，标语与 COLERE 齐宽并拉开词距 */
.footer-brand .brand-en {
  font-size: 1.45rem;
  letter-spacing: 0.15em;
  text-indent: 0.15em;
}

.footer-brand .brand-zh {
  font-size: 1.05rem;
}

.footer-brand .brand-tagline {
  font-size: 0.5rem;
  letter-spacing: 0.025em;
  column-gap: 0.5em;
}

.footer-copy {
  margin: 0;
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.footer-copy a,
.contact-imprint a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--muted) 45%, transparent);
}

.footer-copy a:hover,
.footer-copy a:focus-visible,
.contact-imprint a:hover,
.contact-imprint a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
  outline: none;
}

.footer-sep {
  margin: 0 0.35em;
  opacity: 0.7;
}

.contact-imprint {
  margin: 0.85rem 0 0;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 机构信息 / Imprint / Impressum */
.legal-main {
  width: min(100%, 70rem);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 4.5rem) var(--pad-x) clamp(3rem, 8vw, 5rem);
}

.legal-page {
  max-width: 36rem;
}

.legal-title {
  margin: 0 0 1.35rem;
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.legal-lead {
  margin: 0 0 1.75rem;
  color: var(--ink);
  line-height: 1.65;
}

.legal-heading {
  margin: 1.75rem 0 0.75rem;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.legal-dl {
  margin: 0;
}

.legal-dl > div {
  margin: 0 0 1.15rem;
}

.legal-dl dt {
  margin: 0 0 0.25rem;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.legal-dl dd {
  margin: 0;
  color: var(--body);
  line-height: 1.55;
}

.legal-note {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.92em;
  color: var(--muted);
}

.legal-disclaimer {
  margin-top: 1.5rem;
  font-size: 0.9em;
  line-height: 1.55;
}

.legal-page > p {
  margin: 0 0 1rem;
  color: var(--body);
  line-height: 1.65;
}

.legal-back {
  margin-top: 2.25rem !important;
  font-family: var(--sans);
  font-size: 0.88rem;
  letter-spacing: 0.04em;
}

.legal-back a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--muted) 40%, transparent);
}

.legal-back a:hover,
.legal-back a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
  outline: none;
}

html[lang="zh-Hans"] .legal-title {
  font-family: var(--serif-sc);
  letter-spacing: 0.12em;
}

html[lang="zh-Hans"] .legal-heading,
html[lang="zh-Hans"] .legal-dl dt {
  text-transform: none;
  letter-spacing: 0.16em;
}

html[lang="zh-Hans"] .legal-page,
html[lang="zh-Hans"] .legal-lead,
html[lang="zh-Hans"] .legal-dl dd {
  font-family: var(--serif-sc);
}

@media (max-width: 560px) {
  .topnav a:not([href="#contact"]):not([hreflang]) {
    display: none;
  }

  .lang-switch {
    margin-left: 0;
  }
}

/* 中文页：飞花宋体正文；「化成社」刀隶见 --brand-zh */
html[lang="zh-Hans"] {
  --serif-sc: "FlyFlowerSong", "飞花宋体", "Songti SC", serif;
}

html[lang="zh-Hans"] body {
  font-family: var(--serif-sc);
}

/* 中文页拉丁卡：COLERE 仍用展示体 */
html[lang="zh-Hans"] .origin-card--latin .origin-name {
  font-family: var(--display);
}

html[lang="zh-Hans"] .manifesto {
  font-family: var(--serif-sc);
  font-size: clamp(1.05rem, 1.55vw, 1.18rem);
  line-height: 1.9;
  letter-spacing: 0.04em;
}

html[lang="zh-Hans"] .lead {
  font-family: var(--serif-sc);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  line-height: 1.5;
  letter-spacing: 0.06em;
  font-weight: 500;
}

html[lang="zh-Hans"] .contact h2 {
  font-family: var(--serif-sc);
  letter-spacing: 0.16em;
  font-weight: 500;
}

html[lang="zh-Hans"] .section-label {
  font-family: var(--serif-sc);
  letter-spacing: 0.32em;
  text-transform: none;
}

html[lang="zh-Hans"] .topnav a {
  font-family: var(--serif-sc);
  text-transform: none;
  letter-spacing: 0.14em;
}

html[lang="zh-Hans"] .lang-switch,
html[lang="zh-Hans"] .lang-switch a {
  font-family: var(--sans);
  letter-spacing: 0.06em;
}

html[lang="zh-Hans"] .slogan--zh {
  font-family: var(--serif-sc);
  font-style: normal;
  letter-spacing: 0.14em;
  font-size: clamp(1.35rem, 2.8vw, 1.95rem);
  font-weight: 500;
}

/* 中文页英文 slogan 与英文页一致：Bodoni 斜体 */
html[lang="zh-Hans"] .slogan:not(.slogan--zh) {
  font-family: var(--display);
  font-style: italic;
  letter-spacing: -0.02em;
}

html[lang="zh-Hans"] .origin-name--zh,
html[lang="zh-Hans"] .brand-display-zh,
html[lang="zh-Hans"] .brand-zh {
  font-family: var(--brand-zh);
  font-weight: 500;
}

html[lang="zh-Hans"] .brand-tagline--zh {
  display: flex;
  justify-content: space-between;
  font-family: var(--display);
  font-style: italic;
  font-size: 0.48rem;
  letter-spacing: 0.02em;
  text-align: start;
  text-align-last: auto;
  color: var(--muted);
}

.footer-brand .brand-tagline--zh {
  font-size: 0.5rem;
  letter-spacing: 0.025em;
  column-gap: 0.5em;
  margin-top: 0.28rem;
}

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

  .email,
  .topnav a {
    transition: none;
  }

  .brand,
  .brand-display,
  [data-ink-hover],
  body.is-ink-page {
    cursor: auto;
  }

  .ink-cursor,
  .ink-stain-layer {
    display: none !important;
  }

  .brand-display::before {
    display: none;
  }
}

/*
  墨点光标：全站湿墨笔尖 + 移动留痕；品牌大字另有底晕。
*/
.ink-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 28px;
  height: 28px;
  margin: -14px 0 0 -14px;
  z-index: 80;
  pointer-events: none;
  opacity: 0;
  transform: translate3d(-100px, -100px, 0) scale(0.4);
  transition: opacity 0.25s ease;
  mix-blend-mode: multiply;
}

body.is-ink-hover .ink-cursor {
  opacity: 1;
}

body.is-ink-page,
body.is-ink-hover,
body.is-ink-hover a,
body.is-ink-hover button {
  cursor: none;
}

body.is-ink-hover [data-ink-hover] {
  cursor: none;
}

.ink-cursor-halo {
  position: absolute;
  inset: -70%;
  border-radius: 46% 54% 48% 52% / 52% 44% 56% 48%;
  background: radial-gradient(
    ellipse at 45% 48%,
    rgba(26, 28, 24, 0.22) 0%,
    rgba(26, 28, 24, 0.08) 42%,
    transparent 70%
  );
  filter: blur(3px);
  transform: scale(var(--ink-spread, 1));
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.ink-cursor-core {
  position: absolute;
  inset: 22%;
  border-radius: 58% 42% 55% 45% / 48% 60% 40% 52%;
  background: rgba(22, 24, 20, 0.72);
  box-shadow: 0 0 12px rgba(26, 28, 24, 0.25);
  transform: scale(var(--ink-core, 1));
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 字下留痕层：墨在宣纸上慢慢洇开又淡去 */
.ink-stain-layer {
  position: absolute;
  inset: -18% -12%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.9;
  mix-blend-mode: multiply;
}

.ink-stain-layer--page {
  position: fixed;
  inset: 0;
  /* 宣纸与正文之间：墨痕可见，但不盖住字 */
  z-index: 1;
  overflow: visible;
  opacity: 0.72;
}

.ink-stain {
  position: absolute;
  width: var(--s, 70px);
  height: calc(var(--s, 70px) * 0.78);
  margin: 0;
  translate: -50% -50%;
  border-radius: 48% 52% 55% 45% / 50% 45% 55% 50%;
  background: radial-gradient(
    ellipse at 48% 46%,
    rgba(26, 28, 24, 0.28) 0%,
    rgba(26, 28, 24, 0.1) 40%,
    transparent 72%
  );
  filter: blur(2.5px);
  animation: ink-fade 1.8s ease forwards;
}

@keyframes ink-fade {
  0% {
    opacity: 0.85;
    transform: scale(0.55);
  }
  30% {
    opacity: 0.7;
    transform: scale(1.05);
  }
  100% {
    opacity: 0;
    transform: scale(1.55);
  }
}

@media (max-width: 720px) {
  .ink-cursor,
  .ink-stain-layer {
    display: none;
  }

  .brand,
  .brand-display,
  [data-ink-hover] {
    cursor: auto;
  }

  .brand-display::before {
    display: none;
  }
}