@font-face { font-family: "Homemade Apple"; src: url("assets/homemade-apple.woff2") format("woff2"); font-display: swap; }
@font-face { font-family: "SN Pro"; src: url("assets/sn-pro.woff2") format("woff2"); font-style: normal; font-weight: 100 900; font-display: swap; }
:root {
  color-scheme: light;
  --ink: #09090b;
  --body: #71717a;
  --line: #e4e4e7;
  --surface: #fafaf9;
  --paper: #ffffff;
  --button: #27272a;
  --button-ink: #ffffff;
  --button-hover: #3f3f46;
  --paper-rgb: 255 255 255;
  --dialog-paper: #ffffff;
  --dialog-shadow: 0 12px 32px rgb(9 9 11 / .18), 0 2px 8px rgb(9 9 11 / .06);
  --marker: #ffd43b;
  --marker-ink: #09090b;
  --sans: "SN Pro", -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Helvetica, Arial, sans-serif;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --marker-ink: #18181b;
  --ink: #f4f4f5;
  --body: #b0b0b9;
  --line: #343438;
  --surface: #242427;
  --paper: #151517;
  --button: #ededf0;
  --button-ink: #18181b;
  --button-hover: #ffffff;
  --paper-rgb: 21 21 23;
  --dialog-paper: #1b1b1e;
  --dialog-shadow: 0 12px 40px rgb(0 0 0 / .45), 0 2px 8px rgb(0 0 0 / .24);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; scrollbar-gutter: stable; }
body { margin: 0; background: var(--paper); color: var(--body); font-family: var(--sans); font-size: 15px; line-height: 28px; -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, p, figure { margin: 0; }
h1, h2 { color: var(--ink); font: 500 15px/28px var(--sans); }
strong { color: var(--ink); font-weight: 500; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid var(--body); outline-offset: 4px; }
[hidden] { display: none !important; }
.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; }
.skip-link { position: fixed; top: -60px; left: 24px; z-index: 100; padding: 8px 12px; color: var(--paper); background: var(--ink); }
.skip-link:focus { top: 12px; }
.page-sheet { width: 100%; max-width: 598px; margin-inline: auto; padding: 80px 24px 180px; }
.site-header { position: relative; display: flex; align-items: center; gap: 16px; min-height: 40px; width: 100%; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); font-size: 16px; font-weight: 500; white-space: nowrap; }
/* Pull the logo and toggle outward by their built-in padding so the visible marks line up with the column edges. */
.brand-logo { width: 40px; height: 40px; margin-left: -8px; flex-shrink: 0; object-fit: contain; filter: grayscale(1) brightness(1.02); }
:root[data-theme="dark"] .brand-logo { filter: grayscale(1) contrast(1.1) invert(1) brightness(1.6); mix-blend-mode: screen; }
.theme-toggle { position: absolute; right: -13.5px; top: 50%; transform: translateY(-50%); display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 2px; color: var(--body); background: transparent; }
.theme-toggle svg { position: absolute; width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; transition: opacity 140ms ease; }
.theme-sun { opacity: 0; }
:root[data-theme="dark"] .theme-moon { opacity: 0; }
:root[data-theme="dark"] .theme-sun { opacity: 1; }
.theme-toggle:active { background: var(--surface); }
@media (hover: hover) and (pointer: fine) {
  .theme-toggle:hover { color: var(--ink); background: var(--surface); }
}
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 6px 16px; color: var(--button-ink); background: var(--button); border: 0; border-radius: 2px; font-size: 15px; line-height: 28px; white-space: nowrap; transition: background .15s, transform .15s; }
.button:hover { background: var(--button-hover); }
.button:active { transform: translateY(1px); }
.theme-changing .button { transition-property: transform; }
.button-arrow { display: block; width: 14px; height: 14px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
main { display: flex; flex-direction: column; gap: 40px; padding-top: 48px; }
main > section { display: flex; flex-direction: column; gap: 24px; width: 100%; }
.flow { width: 100%; }
.flow > .prose { margin-top: 24px; }
.hero-copy, .author-copy { display: flex; flex-direction: column; gap: 24px; }
.prose { display: flex; flex-direction: column; gap: 16px; }
:where(p):has(> .marker) { isolation: isolate; }
.marker { position: relative; transition: color 700ms ease-out; }
.marker.is-drawn { color: var(--marker-ink); }
.marker-svg { position: absolute; z-index: -1; top: 0; left: 0; width: 1px; height: 1px; overflow: visible; pointer-events: none; }
.marker-svg path { fill: none; stroke: var(--marker); }
.inline-link { color: inherit; text-decoration: underline; text-decoration-color: var(--line); text-decoration-thickness: 1px; text-underline-offset: 4px; transition: color .15s, text-decoration-color .15s; }
.inline-link:hover { color: var(--ink); text-decoration-color: currentColor; }
.inline-link::after {
  content: ""; display: inline-block; width: 10px; height: 10px; margin-left: 2px; vertical-align: 1px;
  background: var(--body); transition: transform .15s, background-color .15s;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='1.6'%3E%3Cpath d='M4 12 12 4M5 4h7v7'/%3E%3C/svg%3E") center / contain no-repeat;
}
.inline-link:hover::after { transform: translate(1px, -1px); background: var(--ink); }
.small-copy { color: var(--body); font-size: 13px; line-height: 20px; }
.media-frame { width: 100%; aspect-ratio: 4 / 3; overflow: hidden; background: var(--surface); }
.media-frame > img { width: 100%; height: 100%; object-fit: cover; }
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .media-frame > img { transition: transform 600ms cubic-bezier(.25, .1, .25, 1); transform-origin: center; }
  .media-frame:hover > img { transform: scale(1.09); }
}
.final-section { align-items: flex-start; }
.final-section > .flow { display: flex; flex-direction: column; }
.final-section .prose { margin-top: 24px; margin-bottom: 24px; }
.final-section .prose:last-child { margin-bottom: 0; }

.site-footer {
  display: flex; flex-direction: column; align-items: center; gap: 24px;
  margin-top: 64px; padding-top: 64px; border-top: 1px dashed var(--line);
  color: var(--body); font-size: 14px; line-height: 24px; text-align: center;
}
.footer-sign { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--body); transition: color .15s; }
.footer-sign:hover { color: var(--ink); }
.footer-pen { width: 56px; height: 56px; filter: contrast(1.4); mix-blend-mode: multiply; transform-origin: 30% 90%; transition: transform .3s cubic-bezier(.16, 1, .3, 1); }
.footer-sign:hover .footer-pen { transform: rotate(-6deg); }
:root[data-theme="dark"] .footer-pen { filter: contrast(1.4) invert(1) brightness(1.6); mix-blend-mode: screen; }
.footer-name { font-family: "Homemade Apple", cursive; font-size: 18px; line-height: 36px; }

.footer-progressive-blur {
  position: fixed;
  z-index: 20;
  right: 0;
  bottom: 0;
  left: 0;
  height: 160px;
  pointer-events: none;
  transition: opacity 180ms ease, visibility 180ms ease;
}
.footer-progressive-blur span {
  position: absolute;
  z-index: var(--blur-layer);
  inset: 0;
  -webkit-backdrop-filter: blur(var(--blur-radius));
  backdrop-filter: blur(var(--blur-radius));
  -webkit-mask-image: var(--blur-mask);
  mask-image: var(--blur-mask);
}
.footer-progressive-blur span:nth-child(1) { --blur-layer: 1; --blur-radius: .1875px; --blur-mask: linear-gradient(transparent 0%, #000 12.5%, #000 25%, transparent 37.5%); }
.footer-progressive-blur span:nth-child(2) { --blur-layer: 2; --blur-radius: .375px; --blur-mask: linear-gradient(transparent 12.5%, #000 25%, #000 37.5%, transparent 50%); }
.footer-progressive-blur span:nth-child(3) { --blur-layer: 3; --blur-radius: .75px; --blur-mask: linear-gradient(transparent 25%, #000 37.5%, #000 50%, transparent 62.5%); }
.footer-progressive-blur span:nth-child(4) { --blur-layer: 4; --blur-radius: 1.5px; --blur-mask: linear-gradient(transparent 37.5%, #000 50%, #000 62.5%, transparent 75%); }
.footer-progressive-blur span:nth-child(5) { --blur-layer: 5; --blur-radius: 3px; --blur-mask: linear-gradient(transparent 50%, #000 62.5%, #000 75%, transparent 87.5%); }
.footer-progressive-blur span:nth-child(6) { --blur-layer: 6; --blur-radius: 6px; --blur-mask: linear-gradient(transparent 62.5%, #000 75%, #000 87.5%, transparent 100%); }
.footer-progressive-blur span:nth-child(7) { --blur-layer: 7; --blur-radius: 12px; --blur-mask: linear-gradient(transparent 75%, #000 87.5%, #000 100%); }
.footer-progressive-blur span:nth-child(8) { --blur-layer: 8; --blur-radius: 24px; --blur-mask: linear-gradient(transparent 87.5%, #000 100%); }
.footer-progressive-blur::after {
  position: absolute;
  z-index: 9;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgb(var(--paper-rgb) / 0) 0%,
    rgb(var(--paper-rgb) / .3) 40%,
    rgb(var(--paper-rgb) / .8) 75%,
    rgb(var(--paper-rgb) / .98) 100%
  );
  content: "";
}

.floating-join-wrap {
  position: fixed;
  z-index: 30;
  bottom: 48px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  pointer-events: none;
  transition: transform 500ms cubic-bezier(.76, 0, .24, 1), opacity 220ms ease, visibility 220ms ease;
}
.floating-join {
  pointer-events: auto;
  min-height: 44px;
  padding: 0 24px;
  font-size: 15px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .18), 0 2px 6px rgba(0, 0, 0, .08);
}
.has-join-dialog .floating-join-wrap,
.has-join-dialog .footer-progressive-blur { visibility: hidden; opacity: 0; pointer-events: none; }
.has-join-dialog .floating-join-wrap { transform: translateY(10px); }
.join-dialog { position: fixed; inset: auto 0 48px; width: min(360px, calc(100% - 32px)); max-height: calc(100dvh - 96px); margin: 0 auto; padding: 24px; border: 0; border-radius: 0; background: var(--dialog-paper); box-shadow: var(--dialog-shadow); color: var(--body); overflow-y: auto; overscroll-behavior: contain; transform-origin: bottom center; }
.join-dialog:focus { outline: none; }
.join-dialog::backdrop { background: rgb(var(--paper-rgb) / .25); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); animation: join-backdrop-in 180ms ease; }
.join-dialog.is-closing::backdrop { animation: join-backdrop-out 180ms ease forwards; }
@keyframes join-backdrop-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes join-backdrop-out { from { opacity: 1; } to { opacity: 0; } }
.dialog-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.dialog-close { display: grid; place-items: center; width: 32px; height: 32px; padding: 0; background: none; border: 0; color: var(--body); }
.dialog-close:hover { color: var(--ink); background: var(--surface); }
.dialog-close svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.payment-method { margin: 16px 0; font-size: 13px; line-height: 20px; text-align: left; }
.payment-sheet { --qr-size: 200px; --qr-top: 12px; position: relative; padding: var(--qr-top) 20px 20px; background: var(--surface); text-align: center; }
.payment-sheet img { width: var(--qr-size); height: var(--qr-size); object-fit: contain; margin-inline: auto; mix-blend-mode: multiply; }
:root[data-theme="dark"] .payment-sheet img { filter: invert(1); mix-blend-mode: screen; }
/* Integrate the QR background while preserving the original portrait and badge. */
:root[data-theme="dark"] .payment-sheet::before,
:root[data-theme="dark"] .payment-sheet::after { content: ""; position: absolute; z-index: 1; top: var(--qr-top); left: 50%; width: var(--qr-size); height: var(--qr-size); transform: translateX(-50%); background-size: 100% 100%; background-repeat: no-repeat; pointer-events: none; }
:root[data-theme="dark"] .payment-sheet:has(img[src$="wx-pay.png"])::before { background-image: url("assets/wx-pay.png"); clip-path: inset(37.5% round 2%); }
:root[data-theme="dark"] .payment-sheet:has(img[src$="wx-pay.png"])::after { background-image: url("assets/wx-pay.png"); clip-path: circle(5.5% at 62.5% 62.5%); }
:root[data-theme="dark"] .payment-sheet:has(img[src$="ali-pay.png"])::before { background-image: url("assets/ali-pay.png"); clip-path: inset(40% round 2%); }
:root[data-theme="dark"] .payment-sheet:has(img[src$="ali-pay.png"])::after { content: none; }
.payment-sheet p { margin-top: 4px; color: var(--ink); font-size: 16px; line-height: 20px; font-weight: 500; }
.join-steps { display: flex; flex-direction: column; list-style: none; padding: 0; margin: 16px 0 0; }
.join-steps li { display: flex; align-items: baseline; gap: 8px; padding: 6px 0; font-size: 13px; line-height: 20px; }
.join-steps li > span { flex: 0 0 18px; color: var(--body); font-size: 12px; }
.copy-id { display: inline-flex; align-items: center; gap: 5px; padding: 1px 7px; border: 0; border-radius: 0; background: var(--surface); color: var(--ink); font-size: 12px; line-height: 20px; vertical-align: baseline; }
.copy-id svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.copy-id.is-copied svg { display: none; }
.copy-id.is-copied::after { content: "✓"; color: var(--body); }
.copy-status:not(.sr-only) { margin-top: 12px; }
.dialog-foot { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); color: var(--body); font-size: 12px; line-height: 20px; text-align: center; }
@media (max-width: 639px) {
  .page-sheet { padding-top: 64px; padding-bottom: calc(180px + env(safe-area-inset-bottom, 0px)); }
  .site-header { gap: 12px; }
  .join-dialog { bottom: calc(24px + env(safe-area-inset-bottom, 0px)); max-height: calc(100dvh - 48px - env(safe-area-inset-bottom, 0px)); }
  .payment-sheet { --qr-top: 14px; --qr-size: 176px; padding-inline: 16px; }
  .payment-sheet p { margin-top: 5px; }
}
@media (max-width: 359px) {
  .site-header { gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; }
}
@media print {
  .site-header, .floating-join-wrap, .footer-progressive-blur, .join-dialog, .skip-link { display: none; }
  .page-sheet { padding-block: 0; }
  main { padding-top: 0; }
}