:root {
  --paper: #F6EFE4;
  --paper-deep: #EFE3D2;
  --gold: #8E6A24;
  --gold-dim: #7A5A1E;
  --cinnabar: #8B241C;
  --ink: #3A241C;
  --ink-soft: #4F342A;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
  --letter-w: 420px;
  font-family: "Songti SC", "STSong", "SimSun", "Noto Serif SC", "Source Han Serif SC", serif;
}

* { box-sizing: border-box; }

/* Zhi Mang Xing, SIL OFL 1.1 — assets/fonts/LICENSE */
@font-face {
  font-family: "WiddXing";
  src: url("../assets/fonts/xing.woff2") format("woff2"),
       url("../assets/fonts/xing.woff") format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

body.is-signing {
  overflow: hidden;
}

.share-thumb {
  position: fixed;
  left: 0;
  top: 0;
  width: 500px;
  height: 500px;
  opacity: 0.02;
  pointer-events: none;
  z-index: 0;
}

body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: .06;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.foil {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 12;
}

.bgm-tog {
  position: fixed;
  top: calc(.42rem + var(--safe-top));
  right: max(.42rem, env(safe-area-inset-right, 0px));
  z-index: 22;
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  border: 1px solid #E4C36A99;
  border-radius: 50%;
  background: #4a1820cc;
  color: #F4DC8A;
  display: grid;
  place-items: center;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.bgm-disc {
  display: block;
  width: 20px;
  height: 20px;
  -webkit-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
}

.bgm-disc svg {
  display: block;
}

.bgm-tog.is-off {
  color: #E4C36A66;
}

.bgm-tog.is-off::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1.35rem;
  height: 1.5px;
  margin: -.75px 0 0 -.67rem;
  background: #F4DC8A;
  transform: rotate(-32deg);
}

body.is-signing .bgm-tog {
  visibility: hidden;
}

/* —— 拆信 —— */
.gate {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background:
    url("../assets/frame.jpg") center / cover no-repeat,
    var(--paper);
  padding: var(--safe-top) 1.5rem var(--safe-bot);
  -webkit-transition: opacity .7s ease, visibility .7s ease;
  transition: opacity .7s ease, visibility .7s ease;
}

.gate.is-gone {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.gate-hint {
  margin: 0 0 1.6rem;
  letter-spacing: .45em;
  font-size: .82rem;
  color: var(--cinnabar);
  text-shadow: 0 1px 0 #fff8;
}

.envelope-stage { perspective: 900px; }

.envelope {
  position: relative;
  width: min(72vw, 300px);
  height: min(48vw, 200px);
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
}

.envelope-back,
.envelope-body {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #f7ead6, #edd4b8);
  border: 1px solid #c9a24acc;
  box-shadow: 0 14px 28px #c23b3226, inset 0 0 0 1px #fff6;
}

.envelope-back { z-index: 1; }

.letter-peek {
  position: absolute;
  left: 8%;
  right: 8%;
  top: 18%;
  height: 70%;
  background: #fff8ef;
  border: 1px solid #e4c36a99;
  z-index: 2;
  -webkit-transform: translateY(12%);
  transform: translateY(12%);
  -webkit-transition: -webkit-transform .7s ease;
  transition: transform .7s ease;
}

.envelope.is-open .letter-peek {
  -webkit-transform: translateY(-42%);
  transform: translateY(-42%);
}

.envelope-body {
  z-index: 3;
  clip-path: polygon(0 38%, 50% 68%, 100% 38%, 100% 100%, 0 100%);
  background: linear-gradient(180deg, #e8b7a4, #f3d7c4);
}

.envelope-flap {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 56%;
  z-index: 4;
  background: linear-gradient(180deg, #de6b5c, #c23b32);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  -webkit-transform-origin: top center;
  transform-origin: top center;
  border-bottom: 1px solid #e4c36a88;
  -webkit-transition: -webkit-transform .8s ease;
  transition: transform .8s ease;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.envelope.is-open .envelope-flap {
  -webkit-transform: rotateX(-158deg);
  transform: rotateX(-158deg);
}

.seal {
  position: absolute;
  left: 50%;
  top: 42%;
  z-index: 5;
  width: 72px;
  height: 72px;
  padding: 0;
  border: 0;
  background: none;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 4px 8px #c23b3240);
  -webkit-animation: seal-breathe 2.8s ease-in-out infinite;
  animation: seal-breathe 2.8s ease-in-out infinite;
  touch-action: manipulation;
}

.seal svg { display: block; width: 72px; height: 72px; }

.seal::after {
  content: "";
  position: absolute;
  inset: -30%;
  border-radius: 50%;
  background: radial-gradient(circle, #c23b32cc, transparent 70%);
  opacity: 0;
  transform: scale(.3);
  pointer-events: none;
}

.seal.is-bloom { -webkit-animation: none; animation: none; }

.seal.is-bloom::after {
  -webkit-animation: bloom .7s ease-out forwards;
  animation: bloom .7s ease-out forwards;
}

.seal.is-bloom svg {
  -webkit-animation: seal-fade .55s ease-in forwards;
  animation: seal-fade .55s ease-in forwards;
}

@-webkit-keyframes seal-breathe {
  0%, 100% { filter: drop-shadow(0 4px 8px #c23b3240); }
  50% { filter: drop-shadow(0 4px 8px #c23b3240) drop-shadow(0 0 10px #e4c36a99); }
}

@keyframes seal-breathe {
  0%, 100% { filter: drop-shadow(0 4px 8px #c23b3240); }
  50% { filter: drop-shadow(0 4px 8px #c23b3240) drop-shadow(0 0 10px #e4c36a99); }
}

@-webkit-keyframes bloom {
  to { opacity: 0; -webkit-transform: scale(3.2); transform: scale(3.2); }
}

@keyframes bloom {
  to { opacity: 0; transform: scale(3.2); }
}

@-webkit-keyframes seal-fade {
  to { opacity: 0; -webkit-transform: scale(1.15); transform: scale(1.15); }
}

@keyframes seal-fade {
  to { opacity: 0; transform: scale(1.15); }
}

/* —— 信笺 —— */
.letter {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  background:
    url("../assets/letter.jpg?v=2") center top / 100% auto no-repeat,
    #F4EEE4;
}

.letter::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: rgba(255, 248, 239, 0.2);
}

.letter-inner {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 1.2rem), var(--letter-w));
  margin: 0 auto;
  padding: calc(5.6rem + var(--safe-top)) 1.5rem calc(5.4rem + var(--safe-bot));
  overflow: visible;
  background: transparent;
  color: var(--ink);
}

.letter-inner > * + * { margin-top: 2.1rem; }

.letter-inner > .bless:not([hidden]) {
  margin-top: 1.15rem;
}

.letter-inner > .bless:not([hidden]) + * {
  margin-top: 1.2rem;
}

.address {
  margin: 0;
  text-align: center;
  letter-spacing: .35em;
  color: var(--ink);
  font-size: 1rem;
}

.names {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: .9rem;
}

.names .person {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
}

.names .person small {
  font-size: .68rem;
  letter-spacing: .35em;
  color: var(--ink-soft);
}

.names .person .name {
  font-family: "STKaiti", "KaiTi", "KaiTi_GB2312", "Kaiti SC", "STXingkai", "LiSu", "华文楷体", "华文行楷", "Songti SC", serif;
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: .16em;
  line-height: 1.15;
  color: #1a0c08;
}

.names .amp {
  width: 36px;
  height: 36px;
  border: 1px solid var(--gold);
  color: var(--cinnabar);
  font-size: 1.05rem;
  display: grid;
  place-items: center;
  flex: none;
  background: #fff6ea;
}

.opener {
  margin: 0;
  text-align: justify;
  line-height: 2;
  letter-spacing: .08em;
  font-size: .92rem;
  color: var(--ink);
}

.when-text {
  margin: 0 0 1rem;
  text-align: center;
  letter-spacing: .06em;
  font-size: .78rem;
  line-height: 1.85;
  color: var(--ink-soft);
  word-break: break-word;
}

.clepsydra {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .2rem;
  width: 100%;
}

.tick {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  min-width: 0;
}

.tick strong {
  font-weight: 400;
  font-size: 1.2rem;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.tick i {
  display: block;
  width: 1px;
  height: 36px;
  background:
    repeating-linear-gradient(
      to bottom,
      var(--gold) 0 2px,
      transparent 2px 7px
    );
  opacity: .85;
}

.tick span {
  font-size: .65rem;
  letter-spacing: .2em;
  color: var(--ink-soft);
}

.when-past {
  margin: .8rem 0 0;
  text-align: center;
  letter-spacing: .4em;
  color: var(--cinnabar);
  font-size: .8rem;
}

.scrolls-wrap { margin-left: -1.5rem; margin-right: -1.5rem; }

.scrolls {
  display: flex;
  gap: 1.1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: .4rem 1.5rem;
  -webkit-overflow-scrolling: touch;
}

.scrolls::-webkit-scrollbar { display: none; }

.scroll {
  flex: 0 0 68%;
  scroll-snap-align: center;
}

.scroll figure { margin: 0; }

.scroll .rod {
  height: 6px;
  margin: 0 8%;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold), var(--cinnabar));
  border-radius: 2px;
}

.scroll img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid #c9a24a88;
  border-top: 0;
  background: var(--paper-deep);
}

.scroll figcaption {
  margin-top: .45rem;
  text-align: center;
  letter-spacing: .4em;
  font-size: .72rem;
  color: var(--ink-soft);
}

.venue { text-align: center; }

.venue + .venue { margin-top: 1.8rem; }

.venue .label {
  display: inline-block;
  margin-bottom: .5rem;
  letter-spacing: .45em;
  font-size: .72rem;
  color: var(--ink);
  border-bottom: 1px solid #c9a24a88;
  padding-bottom: .2rem;
}

.venue h2 {
  margin: 0 0 .35rem;
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: .16em;
}

.venue address {
  font-style: normal;
  font-size: .82rem;
  letter-spacing: .08em;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.navs {
  display: flex;
  justify-content: center;
  gap: .7rem;
}

.navs a {
  color: var(--ink);
  text-decoration: none;
  border: 1px solid #c9a24acc;
  padding: .45rem .9rem;
  font-size: .78rem;
  letter-spacing: .2em;
  background: #fff8efcc;
}

.rsvp-box {
  position: relative;
  border: 1px solid #c9a24a80;
  padding: 1.3rem 1rem 1.1rem;
  background: #fff8ef99;
}

.rsvp-box h2 {
  margin: 0 0 1rem;
  text-align: center;
  font-size: .8rem;
  font-weight: 400;
  letter-spacing: .5em;
  color: var(--ink);
}

.rsvp-box label {
  display: block;
  margin: .7rem 0 .3rem;
  font-size: .75rem;
  letter-spacing: .2em;
  color: var(--ink-soft);
}

.rsvp-box input,
.rsvp-box textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid #c9a24a80;
  background: transparent;
  color: var(--ink);
  font: inherit;
  padding: .35rem 0;
  border-radius: 0;
}

.rsvp-box textarea { resize: vertical; min-height: 3.2rem; }

.rsvp-box .choices {
  display: flex;
  justify-content: center;
  gap: 1.4rem;
  margin: .4rem 0 0;
}

.rsvp-box .choices label {
  margin: 0;
  color: var(--ink);
  letter-spacing: .15em;
}

.rsvp-box button,
.rsvp-link {
  display: block;
  width: 100%;
  margin-top: 1.2rem;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--gold);
  padding: .7rem;
  font: inherit;
  letter-spacing: .4em;
  text-align: center;
  text-decoration: none;
}

.rsvp-box button:disabled { opacity: .45; }

.stamp {
  position: absolute;
  right: 10%;
  top: 28%;
  width: 72px;
  height: 72px;
  border: 3px solid var(--cinnabar);
  color: var(--cinnabar);
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  letter-spacing: .15em;
  transform: rotate(-14deg);
  opacity: 0;
  pointer-events: none;
}

.stamp.is-on { animation: stamp-in .45s ease forwards; }

@keyframes stamp-in {
  from { opacity: 0; transform: rotate(-14deg) scale(1.4); }
  to { opacity: .88; transform: rotate(-14deg) scale(1); }
}

.wall-box h2 {
  margin: 0 0 .7rem;
  text-align: center;
  font-size: .8rem;
  font-weight: 400;
  letter-spacing: .5em;
  color: var(--ink);
}

.wall {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 0 .32rem;
  box-sizing: border-box;
}

.wall-yard {
  position: relative;
  width: 100%;
  aspect-ratio: 738 / 1005;
  margin: 0 0 .6rem;
  overflow: hidden;
  background: #F6F1E6;
}

.wall-yard::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: url("../assets/wall.jpg?v=1") center / contain no-repeat;
  opacity: .6;
}

.wall-frame {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.wall-board {
  position: absolute;
  inset: 7.5%;
  overflow: hidden;
  pointer-events: auto;
}

.wall-card {
  position: absolute;
  z-index: 1;
  width: var(--w, 50%);
  height: var(--h, 50%);
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
  -webkit-transform: rotate(var(--rot, -2deg));
  transform: rotate(var(--rot, -2deg));
}

.wall-card.is-in {
  -webkit-animation: wall-in .45s ease;
  animation: wall-in .45s ease;
}

@-webkit-keyframes wall-in {
  from { opacity: 0; -webkit-transform: rotate(var(--rot, -2deg)) scale(1.25); transform: rotate(var(--rot, -2deg)) scale(1.25); }
  to { opacity: 1; -webkit-transform: rotate(var(--rot, -2deg)) scale(1); transform: rotate(var(--rot, -2deg)) scale(1); }
}

@keyframes wall-in {
  from { opacity: 0; transform: rotate(var(--rot, -2deg)) scale(1.25); }
  to { opacity: 1; transform: rotate(var(--rot, -2deg)) scale(1); }
}

.wall-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: none;
  -webkit-filter:
    drop-shadow(1px 0 0 #1A120C)
    drop-shadow(-1px 0 0 #1A120C)
    drop-shadow(0 1px 0 #1A120C)
    drop-shadow(0 -1px 0 #1A120C);
  filter:
    drop-shadow(1px 0 0 #1A120C)
    drop-shadow(-1px 0 0 #1A120C)
    drop-shadow(0 1px 0 #1A120C)
    drop-shadow(0 -1px 0 #1A120C);
}

.wall-sheet {
  position: fixed;
  z-index: 40;
  display: flex;
  background: #4a1820;
  overscroll-behavior: none;
}

.wall-sheet[hidden] {
  display: none !important;
}

/* ponytail: WeChat rarely locks orientation; fake landscape via rotate. 100dvh if supported. */
@media (orientation: landscape) {
  .wall-sheet {
    inset: 0;
    width: auto;
    height: auto;
    transform: none;
    -webkit-transform: none;
  }
}

@media (orientation: portrait) {
  .wall-sheet {
    top: 50%;
    left: 50%;
    width: 100vh;
    width: 100dvh;
    height: 100vw;
    height: 100dvw;
    transform: translate(-50%, -50%) rotate(90deg);
    -webkit-transform: translate(-50%, -50%) rotate(90deg);
    transform-origin: center center;
    -webkit-transform-origin: center center;
  }
}

.wall-sheet-stage {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 100%;
  min-height: 0;
}

.wall-sheet-pad {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  width: 0;
  padding: .45rem;
}

.wall-sheet canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: #f4eee4;
  border: 0;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.wall-sheet-side {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .45rem;
  width: 5.4rem;
  flex: 0 0 5.4rem;
  padding: .55rem .45rem;
}

.wall-sheet-title {
  margin: 0;
  text-align: center;
  color: #E8C85A;
  letter-spacing: .35em;
  font-size: .78rem;
  font-weight: 400;
}

.wall-sheet-hint {
  min-height: 1.1em;
  margin: 0;
  text-align: center;
  color: #E8C85A;
  font-size: .66rem;
  letter-spacing: .08em;
}

.wall-sheet-side button {
  margin: 0;
  width: 100%;
  background: transparent;
  color: #E8C85A;
  border: 1px solid #c9a24a;
  padding: .7rem .2rem;
  font: inherit;
  letter-spacing: .22em;
  touch-action: manipulation;
}

.wall-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.1rem;
}

.wall-actions button {
  flex: 1;
  width: auto;
  margin-top: 0;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--gold);
  padding: .7rem;
  font: inherit;
  letter-spacing: .22em;
}

.wall-hint {
  margin: .7rem 0 0;
  text-align: center;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--ink-soft);
}

.wall-keep {
  position: fixed;
  inset: 0;
  z-index: 32;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .8rem;
  padding: 1.1rem 1rem var(--safe-bot);
  background: rgba(30, 18, 14, .9);
}

.wall-keep[hidden] {
  display: none !important;
}

.wall-keep-hint {
  margin: 0;
  color: #E8C85A;
  letter-spacing: .18em;
  font-size: .78rem;
}

.wall-keep img {
  max-width: 92%;
  max-height: 72%;
  background: #F5EFE2;
  -webkit-touch-callout: default;
  pointer-events: auto;
}

.wall-keep button {
  margin: 0;
  background: transparent;
  color: #E8C85A;
  border: 1px solid #c9a24a;
  padding: .55rem 1.4rem;
  font: inherit;
  letter-spacing: .28em;
}

.wall-soon {
  margin: 0;
  text-align: center;
  letter-spacing: .35em;
  font-size: .75rem;
  color: var(--ink-soft);
  opacity: .9;
}

.colophon {
  text-align: center;
  letter-spacing: .2em;
  font-size: .78rem;
  color: var(--ink);
  line-height: 1.9;
}

.bless {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 10.4rem;
  overflow: visible;
  pointer-events: none;
}

.bless[hidden] {
  display: none !important;
}

body.is-signing .bless {
  visibility: hidden;
}

.bless-lane {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  z-index: 2;
  height: 9.1rem;
  overflow: hidden;
  text-align: center;
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
}

.bless-line {
  height: 1.68rem;
  margin: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  text-align: center;
  font-family: "STKaiti", "KaiTi", "KaiTi_GB2312", "Kaiti SC", "华文楷体", "楷体", serif;
  font-size: .98rem;
  font-weight: 400;
  line-height: 1.68rem;
  letter-spacing: .05em;
  color: #C23B32;
  opacity: .1;
  text-shadow: none;
  -webkit-transition: opacity .7s ease, font-size .35s ease;
  transition: opacity .7s ease, font-size .35s ease;
}

.bless-line.is-edge {
  opacity: .16;
}

.bless-line.is-near {
  opacity: .4;
}

.bless-line.is-now {
  height: 2.22rem;
  font-family: "WiddXing", "STXingkai", "华文行楷", "Xingkai SC", serif;
  font-size: 1.28rem;
  font-weight: 700;
  line-height: 2.22rem;
  opacity: 1;
  color: #C23B32;
  text-shadow:
    -1px -1px 0 #1a0c08,
     1px -1px 0 #1a0c08,
    -1px  1px 0 #1a0c08,
     1px  1px 0 #1a0c08,
     0   -1px 0 #1a0c08,
     0    1px 0 #1a0c08,
    -1px  0   0 #1a0c08,
     1px  0   0 #1a0c08;
}

.bless.is-still .bless-line {
  -webkit-transition: none;
  transition: none;
}