:root {
  --bg: #fff4fb;
  --bg-strong: #ffe4f2;
  --pink: #ff68a8;
  --pink-deep: #d92f7e;
  --rose: #ff9bbf;
  --cream: #fffaf2;
  --gold: #f4bc5f;
  --ink: #4a2538;
  --muted: #8d6076;
  --card: rgba(255, 255, 255, 0.74);
  --shadow: 0 24px 70px rgba(217, 47, 126, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Hiragino Sans GB",
    system-ui,
    sans-serif;
  background:
    radial-gradient(circle at 12% 14%, rgba(255, 160, 197, 0.42), transparent 24rem),
    radial-gradient(circle at 82% 8%, rgba(244, 188, 95, 0.28), transparent 18rem),
    linear-gradient(135deg, #fff7fc 0%, #ffe8f4 45%, #fffaf2 100%);
  overflow-x: hidden;
}

body.guide-active {
  overflow: hidden;
}

body.guide-active .hero,
body.guide-active main,
body.guide-active .footer,
body.guide-active .music-toggle {
  visibility: hidden;
  pointer-events: none;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 104, 168, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 104, 168, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.sparkle-layer {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  overflow: hidden;
}

.sparkle {
  position: absolute;
  top: -2rem;
  color: rgba(255, 104, 168, 0.72);
  animation: fall linear forwards;
  text-shadow: 0 0 16px rgba(255, 255, 255, 0.9);
}

.music-toggle {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 9px 16px 9px 10px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 999px;
  color: var(--pink-deep);
  font: inherit;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 16px 38px rgba(217, 47, 126, 0.18);
  backdrop-filter: blur(18px);
  cursor: pointer;
  transition:
    transform 0.25s ease,
    background 0.25s ease;
}

.music-toggle span {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
}

.music-toggle:hover {
  transform: translateY(-3px);
}

.music-toggle.playing {
  color: #fff;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
}

.music-toggle.playing span {
  color: var(--pink-deep);
  background: #fff;
}

.guide-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: clamp(18px, 4vw, 48px);
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 104, 168, 0.34), transparent 22rem),
    radial-gradient(circle at 82% 16%, rgba(244, 188, 95, 0.28), transparent 18rem),
    linear-gradient(135deg, rgba(255, 247, 252, 0.96), rgba(255, 228, 242, 0.96));
  transition:
    opacity 0.6s ease,
    visibility 0.6s ease;
}

.guide-overlay::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 104, 168, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 104, 168, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle, black, transparent 76%);
}

.guide-overlay.hide {
  opacity: 0;
  visibility: hidden;
}

.guide-card {
  position: relative;
  width: min(560px, 100%);
  padding: clamp(28px, 7vw, 56px);
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: clamp(30px, 6vw, 52px);
  text-align: center;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 237, 247, 0.84)),
    radial-gradient(circle at top, rgba(255, 104, 168, 0.18), transparent 45%);
  box-shadow: 0 34px 90px rgba(217, 47, 126, 0.22);
  overflow: hidden;
  animation: guideFloat 3.8s ease-in-out infinite;
}

.guide-card::before,
.guide-card::after {
  position: absolute;
  border-radius: 999px;
  pointer-events: none;
  content: "";
  filter: blur(1px);
}

.guide-card::before {
  top: 22px;
  right: 30px;
  width: 82px;
  height: 82px;
  background: rgba(255, 104, 168, 0.16);
}

.guide-card::after {
  left: 34px;
  bottom: 30px;
  width: 54px;
  height: 54px;
  background: rgba(244, 188, 95, 0.22);
}

.guide-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 16px;
  border-radius: 999px;
  color: var(--pink-deep);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: rgba(255, 104, 168, 0.12);
}

.guide-card h1 {
  margin: 20px 0 12px;
  color: var(--ink);
  font-size: clamp(32px, 7vw, 58px);
  line-height: 1.05;
}

.guide-card p {
  margin: 0 auto;
  max-width: 430px;
  color: var(--muted);
  font-size: clamp(16px, 3vw, 20px);
  line-height: 1.85;
}

.guide-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 28px 0 22px;
}

.guide-dots span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(217, 47, 126, 0.22);
  transition: 0.25s ease;
}

.guide-dots span.active {
  width: 28px;
  background: var(--pink-deep);
}

.guide-button {
  min-height: 52px;
  padding: 0 30px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  font: inherit;
  font-weight: 900;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  box-shadow: 0 18px 42px rgba(217, 47, 126, 0.24);
  cursor: pointer;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.guide-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 52px rgba(217, 47, 126, 0.3);
}

.hero {
  position: relative;
  min-height: 100vh;
  padding: 28px clamp(20px, 5vw, 72px) 72px;
}

.hero::after {
  position: absolute;
  right: -8rem;
  bottom: 5rem;
  width: 26rem;
  height: 26rem;
  border-radius: 50%;
  content: "";
  background: radial-gradient(circle, rgba(255, 104, 168, 0.24), transparent 70%);
  filter: blur(2px);
  z-index: -1;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
  box-shadow: 0 12px 34px rgba(217, 47, 126, 0.1);
  backdrop-filter: blur(18px);
}

.brand {
  font-weight: 800;
  color: var(--pink-deep);
  letter-spacing: 0.04em;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(310px, 0.82fr);
  align-items: center;
  gap: clamp(34px, 5vw, 72px);
  max-width: 1180px;
  margin: 68px auto 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--pink-deep);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(48px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: -0.08em;
}

h1 span {
  display: block;
  margin-top: 12px;
  color: var(--pink-deep);
  text-shadow: 0 10px 34px rgba(217, 47, 126, 0.22);
}

.lead {
  min-height: 72px;
  max-width: 710px;
  color: #6c3a51;
  font-size: clamp(18px, 2.3vw, 26px);
  line-height: 1.65;
}

.lead::after {
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-left: 4px;
  vertical-align: -0.16em;
  content: "";
  background: var(--pink);
  animation: blink 0.8s steps(2, start) infinite;
}

.birthday-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 34px 0;
}

.birthday-panel div {
  min-height: 116px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 28px;
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.birthday-panel strong {
  display: block;
  margin-bottom: 10px;
  color: var(--pink-deep);
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1;
}

.birthday-panel span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.playlist-card {
  display: grid;
  gap: 16px;
  margin-top: 22px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(255, 231, 242, 0.72)),
    radial-gradient(circle at top right, rgba(255, 104, 168, 0.18), transparent 36%);
  box-shadow: 0 22px 58px rgba(217, 47, 126, 0.14);
  backdrop-filter: blur(18px);
}

.playlist-card h2 {
  margin: 6px 0 8px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.15;
}

.playlist-card span {
  color: var(--muted);
  font-size: 14px;
}

.playlist-card strong {
  color: var(--pink-deep);
}

.playlist-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.playlist-option {
  padding: 10px 14px;
  border: 1px solid rgba(255, 104, 168, 0.18);
  border-radius: 999px;
  color: var(--pink-deep);
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 10px 24px rgba(217, 47, 126, 0.08);
  cursor: pointer;
  transition:
    transform 0.22s ease,
    background 0.22s ease,
    color 0.22s ease;
}

.playlist-option:hover,
.playlist-option.active {
  color: #fff;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  transform: translateY(-2px);
}

.playlist-play {
  justify-self: start;
  min-height: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  font: inherit;
  font-weight: 900;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  box-shadow: 0 16px 34px rgba(217, 47, 126, 0.22);
  cursor: pointer;
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease;
}

.playlist-play:hover,
.playlist-play.playing {
  transform: translateY(-2px);
  box-shadow: 0 20px 42px rgba(217, 47, 126, 0.28);
}

.letter-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  padding: 0 22px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    background 0.25s ease;
}

.letter-button {
  color: #fff;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  box-shadow: 0 18px 34px rgba(217, 47, 126, 0.28);
}

.letter-button:hover {
  transform: translateY(-3px);
}

.portrait-frame {
  position: relative;
  width: min(100%, 430px);
  margin-inline: auto;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: 44px;
  background: rgba(255, 255, 255, 0.56);
  box-shadow: 0 30px 90px rgba(217, 47, 126, 0.22);
  transform: rotate(2deg);
}

.portrait-frame::before,
.portrait-frame::after {
  position: absolute;
  z-index: 1;
  content: "✦";
  color: var(--gold);
  font-size: 42px;
  filter: drop-shadow(0 8px 18px rgba(244, 188, 95, 0.26));
}

.portrait-frame::before {
  top: -22px;
  left: 28px;
}

.portrait-frame::after {
  right: -15px;
  bottom: 92px;
}

.portrait-frame img {
  aspect-ratio: 3 / 4;
  width: 100%;
  border-radius: 34px;
  object-fit: cover;
}

.floating-badge {
  position: absolute;
  z-index: 2;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--pink-deep);
  font-size: 14px;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 14px 30px rgba(217, 47, 126, 0.18);
  backdrop-filter: blur(14px);
}

.badge-top {
  top: 28px;
  right: -22px;
}

.badge-bottom {
  left: -18px;
  bottom: 38px;
}

.support-poster-section,
.ritual-section,
.wish-section,
.gallery-section,
.letter-section,
.video-section,
.playlist-section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 76px clamp(20px, 5vw, 72px);
}

.support-poster-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 1.18fr);
  align-items: center;
  gap: clamp(22px, 4vw, 52px);
  padding-top: 26px;
}

.support-poster-copy {
  padding: 28px;
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.56);
  box-shadow: 0 18px 52px rgba(217, 47, 126, 0.12);
}

.support-poster-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.05em;
}

.support-poster-copy p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.75;
}

.support-poster {
  width: 100%;
  border: 10px solid rgba(255, 255, 255, 0.82);
  border-radius: 38px;
  box-shadow: 0 26px 70px rgba(217, 47, 126, 0.18);
}

.wish-card p,
.letter-copy p,
.letter-card p,
.footer p {
  color: var(--muted);
  line-height: 1.75;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading p {
  margin-bottom: 12px;
  color: var(--pink-deep);
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-heading h2 {
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.05em;
}

.wish-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 18px;
}

.wish-card {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 34px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(255, 228, 242, 0.72));
  box-shadow: var(--shadow);
}

.wish-card.large {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 430px;
  background:
    linear-gradient(to top, rgba(74, 37, 56, 0.68), transparent 55%),
    url("assets/photos/flower-grass.jpg") center / cover;
  color: #fff;
}

.wish-card.large p {
  color: rgba(255, 255, 255, 0.88);
}

.wish-card span {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 28px;
  border-radius: 50%;
  color: var(--pink-deep);
  background: rgba(255, 255, 255, 0.74);
}

.wish-card h3 {
  margin-bottom: 12px;
  font-size: 26px;
}

.ritual-section {
  padding-top: 28px;
}

.ritual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 18px;
}

.ritual-card,
.gift-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 42px;
  background:
    radial-gradient(circle at 18% 15%, rgba(255, 255, 255, 0.92), transparent 18rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(255, 228, 242, 0.72));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.ritual-card {
  display: grid;
  grid-template-columns: 0.88fr 1fr;
  align-items: center;
  min-height: 390px;
  padding: clamp(26px, 4vw, 42px);
}

.cake-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  padding-top: 54px;
}

.cake-body {
  display: grid;
  place-items: end center;
  width: 220px;
  height: 118px;
  padding-bottom: 20px;
  border-radius: 26px 26px 46px 46px;
  color: #fff;
  font-size: 56px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  box-shadow: 0 22px 48px rgba(217, 47, 126, 0.24);
}

.cake-top {
  position: absolute;
  top: 78px;
  left: 50%;
  width: 236px;
  height: 38px;
  border-radius: 999px;
  background: #fff;
  box-shadow: inset 0 -10px 0 rgba(255, 155, 191, 0.34);
  transform: translateX(-50%);
}

.cake-plate {
  width: 270px;
  height: 22px;
  margin-top: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 14px 28px rgba(217, 47, 126, 0.12);
}

.candle {
  position: absolute;
  top: 34px;
  left: 50%;
  width: 18px;
  height: 62px;
  border-radius: 9px;
  background: repeating-linear-gradient(
    45deg,
    #fff 0 7px,
    rgba(255, 104, 168, 0.72) 7px 14px
  );
}

.candle-one {
  transform: translateX(-76px);
}

.candle-three {
  transform: translateX(58px);
}

.candle span {
  position: absolute;
  top: -24px;
  left: 50%;
  width: 22px;
  height: 30px;
  border-radius: 50% 50% 45% 45%;
  opacity: 0;
  background: radial-gradient(circle at 50% 72%, #fff4b8 0 18%, #ffb34f 42%, #ff68a8 76%);
  filter: drop-shadow(0 0 16px rgba(255, 179, 79, 0.78));
  transform: translateX(-50%) scale(0.2);
  transition:
    opacity 0.35s ease,
    transform 0.35s ease;
}

.ritual-card.lit .candle span {
  opacity: 1;
  transform: translateX(-50%) scale(1);
  animation: flameDance 0.9s ease-in-out infinite alternate;
}

.ritual-copy h3,
.gift-copy h3 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.ritual-copy p,
.gift-copy p {
  color: var(--muted);
  line-height: 1.75;
}

.ritual-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 18px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  font: inherit;
  font-weight: 900;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  box-shadow: 0 18px 34px rgba(217, 47, 126, 0.24);
  cursor: pointer;
  transition: transform 0.25s ease;
}

.ritual-button:hover {
  transform: translateY(-3px);
}

.gift-card {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 390px;
  padding: clamp(26px, 4vw, 42px);
  text-align: center;
}

.gift-box {
  position: relative;
  width: 210px;
  height: 170px;
  margin-bottom: 30px;
  border: 0;
  background: transparent;
  cursor: pointer;
  animation: giftFloat 2.6s ease-in-out infinite;
}

.gift-lid,
.gift-body,
.gift-ribbon,
.gift-note-card,
.gift-bow,
.gift-spark {
  position: absolute;
  left: 50%;
  display: block;
  transform: translateX(-50%);
}

.gift-note-card {
  top: 8px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 118px;
  height: 76px;
  border: 2px solid rgba(255, 104, 168, 0.18);
  border-radius: 18px;
  color: var(--pink-deep);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.08em;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(255, 242, 248, 0.98)),
    repeating-linear-gradient(0deg, transparent 0 16px, rgba(255, 104, 168, 0.08) 16px 17px);
  box-shadow: 0 16px 34px rgba(217, 47, 126, 0.14);
  opacity: 0;
  transition:
    opacity 0.38s ease,
    transform 0.5s ease;
}

.gift-lid {
  top: 50px;
  z-index: 4;
  width: 188px;
  height: 34px;
  border-radius: 18px 18px 10px 10px;
  background:
    linear-gradient(135deg, #ffaad0, var(--pink-deep)),
    linear-gradient(90deg, transparent 0 42%, rgba(255, 255, 255, 0.34) 42% 58%, transparent 58%);
  box-shadow: 0 14px 26px rgba(217, 47, 126, 0.22);
  transition:
    opacity 0.36s ease,
    transform 0.5s ease;
}

.gift-body {
  bottom: 8px;
  z-index: 2;
  width: 166px;
  height: 100px;
  border: 2px solid rgba(255, 104, 168, 0.22);
  border-radius: 12px 12px 30px 30px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(255, 231, 242, 0.96)),
    linear-gradient(90deg, transparent 0 42%, rgba(255, 104, 168, 0.18) 42% 58%, transparent 58%);
  box-shadow:
    inset 0 -18px 0 rgba(255, 104, 168, 0.07),
    0 18px 36px rgba(217, 47, 126, 0.16);
  transition:
    opacity 0.36s ease,
    transform 0.42s ease;
}

.gift-ribbon {
  bottom: 8px;
  z-index: 3;
  width: 28px;
  height: 126px;
  border-radius: 999px;
  background: linear-gradient(180deg, #ffd277, #ff8fc0);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.34);
  transition:
    opacity 0.36s ease,
    transform 0.42s ease;
}

.gift-bow {
  top: 24px;
  z-index: 5;
  width: 58px;
  height: 42px;
  border: 13px solid #ff8fc0;
  background: rgba(255, 255, 255, 0.22);
  box-shadow: 0 10px 20px rgba(217, 47, 126, 0.14);
  transition:
    opacity 0.36s ease,
    transform 0.5s ease;
}

.gift-bow-left {
  border-radius: 56% 44% 50% 50%;
  transform: translateX(-58px) rotate(-18deg);
}

.gift-bow-right {
  border-radius: 44% 56% 50% 50%;
  transform: translateX(0) rotate(18deg);
}

.gift-spark {
  z-index: 6;
  color: var(--gold);
  font-size: 26px;
  opacity: 0.75;
  text-shadow: 0 0 16px rgba(255, 255, 255, 0.9);
}

.gift-spark-one {
  top: 16px;
  left: 24px;
}

.gift-spark-two {
  top: 108px;
  left: 184px;
  color: var(--pink-deep);
  font-size: 22px;
}

.gift-card.open .gift-lid {
  opacity: 0;
  transform: translate(18px, -68px) rotate(16deg) scale(0.86);
}

.gift-card.open .gift-note-card {
  opacity: 1;
  transform: translate(-50%, -26px);
}

.gift-card.open .gift-ribbon,
.gift-card.open .gift-bow {
  opacity: 0;
  transform: translateX(-50%) scale(0.86);
}

.gift-card.open .gift-bow-left {
  transform: translateX(-74px) translateY(-28px) rotate(-32deg) scale(0.86);
}

.gift-card.open .gift-bow-right {
  transform: translateX(16px) translateY(-28px) rotate(32deg) scale(0.86);
}

.gift-card.open .gift-box {
  animation: giftPop 0.7s ease both;
}

.gift-card.open .gift-message-pop {
  color: var(--pink-deep);
  font-weight: 900;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto minmax(0, 860px) auto;
  align-items: center;
  gap: 18px;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  background: rgba(74, 37, 56, 0.72);
  backdrop-filter: blur(18px);
  transition: opacity 0.28s ease;
}

.lightbox[hidden] {
  display: none;
}

.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-frame {
  position: relative;
  overflow: hidden;
  margin: 0;
  border: 10px solid rgba(255, 255, 255, 0.94);
  border-radius: 34px;
  background: #fff;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.28);
}

.lightbox-frame img {
  width: 100%;
  max-height: min(78vh, 760px);
  object-fit: contain;
  background: #fff4fb;
}

.lightbox-frame figcaption {
  padding: 16px 18px;
  color: var(--pink-deep);
  font-weight: 900;
  text-align: center;
  background: #fff;
}

.lightbox-close,
.lightbox-nav {
  border: 0;
  color: var(--pink-deep);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
  cursor: pointer;
}

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  font-size: 30px;
}

.lightbox-nav {
  width: 52px;
  height: 72px;
  border-radius: 999px;
  font-size: 44px;
  line-height: 1;
}

.photo-card {
  cursor: zoom-in;
}

.photo-strip {
  overflow: hidden;
  padding: 28px 0;
  border-block: 1px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.36);
}

.strip-track {
  display: flex;
  gap: 18px;
  width: max-content;
  animation: scrollStrip 38s linear infinite;
}

.strip-track img {
  width: 210px;
  height: 280px;
  border: 8px solid #fff;
  border-radius: 28px;
  object-fit: cover;
  box-shadow: 0 18px 36px rgba(217, 47, 126, 0.16);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: 270px;
  gap: 18px;
}

.photo-card {
  position: relative;
  overflow: hidden;
  margin: 0;
  border: 10px solid rgba(255, 255, 255, 0.9);
  border-radius: 34px;
  box-shadow: var(--shadow);
  background: #fff;
  transform: translateZ(0);
}

.photo-card.tall {
  grid-row: span 2;
}

.photo-card.wide {
  grid-column: span 2;
}

.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s ease;
}

.photo-card.photo-focus-lower img {
  object-position: center 28%;
}

.photo-card.photo-focus-up img {
  object-position: center 68%;
}

.photo-card:hover img {
  transform: scale(1.07);
}

.photo-card figcaption {
  position: absolute;
  right: 14px;
  bottom: 14px;
  left: 14px;
  padding: 12px 14px;
  border-radius: 20px;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  background: linear-gradient(90deg, rgba(217, 47, 126, 0.84), rgba(255, 104, 168, 0.55));
  backdrop-filter: blur(12px);
}

.letter-section {
  padding-bottom: 96px;
}

.video-section {
  padding-top: 0;
}

.video-card {
  position: relative;
  overflow: hidden;
  padding: clamp(10px, 2vw, 16px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: clamp(30px, 5vw, 48px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(255, 231, 242, 0.76)),
    radial-gradient(circle at 12% 18%, rgba(255, 104, 168, 0.2), transparent 18rem);
  box-shadow: 0 28px 78px rgba(217, 47, 126, 0.18);
}

.video-card::before {
  position: absolute;
  top: 20px;
  left: 24px;
  z-index: 1;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--pink-deep);
  font-size: 13px;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.82);
  content: "生日视频";
  box-shadow: 0 12px 26px rgba(217, 47, 126, 0.14);
}

.video-card video {
  width: 100%;
  max-height: min(76vh, 720px);
  border-radius: clamp(22px, 4vw, 36px);
  background: #fff;
  object-fit: contain;
  box-shadow: inset 0 0 0 1px rgba(255, 104, 168, 0.08);
}

.letter-shell {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  overflow: hidden;
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 44px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(255, 228, 242, 0.82)),
    radial-gradient(circle at 88% 18%, rgba(244, 188, 95, 0.32), transparent 18rem);
  box-shadow: 0 32px 90px rgba(217, 47, 126, 0.18);
}

.letter-shell::after {
  position: absolute;
  right: -50px;
  bottom: -76px;
  content: "LOVE";
  color: rgba(255, 104, 168, 0.1);
  font-size: 142px;
  font-weight: 900;
  letter-spacing: -0.1em;
  transform: rotate(-12deg);
}

.letter-copy {
  position: relative;
  z-index: 1;
  max-width: 620px;
}

.letter-copy h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.12;
}

.letter-button {
  position: relative;
  z-index: 1;
  align-self: start;
}

.letter-card {
  position: relative;
  z-index: 1;
  grid-column: 1 / -1;
  max-height: 0;
  overflow: hidden;
  padding: 0 28px;
  border-radius: 30px;
  opacity: 0;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 0 0 1px rgba(255, 104, 168, 0.16);
  transition:
    max-height 0.55s ease,
    padding 0.55s ease,
    opacity 0.35s ease;
}

.letter-card.open {
  max-height: 520px;
  padding: 28px;
  opacity: 1;
}

.letter-card h3 {
  color: var(--pink-deep);
  font-size: 28px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.48);
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--pink-deep);
  font-weight: 900;
}

@keyframes fall {
  to {
    transform: translate3d(var(--drift), calc(100vh + 4rem), 0) rotate(360deg);
    opacity: 0;
  }
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@keyframes scrollStrip {
  to {
    transform: translateX(calc(-50% - 9px));
  }
}

@keyframes flameDance {
  from {
    transform: translateX(-50%) scale(0.92) rotate(-4deg);
  }

  to {
    transform: translateX(-50%) scale(1.08) rotate(4deg);
  }
}

@keyframes giftFloat {
  50% {
    transform: translateY(-8px);
  }
}

@keyframes giftPop {
  40% {
    transform: scale(1.08);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes guideFloat {
  50% {
    transform: translateY(-8px);
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .wish-grid,
  .ritual-grid,
  .ritual-card,
  .letter-shell {
    grid-template-columns: 1fr;
  }

  .support-poster-section {
    grid-template-columns: 1fr;
  }

  .gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .letter-button {
    justify-self: start;
  }

  .cake-stage {
    min-height: 250px;
    padding-top: 46px;
  }
}

@media (max-width: 640px) {
  h1,
  h2,
  h3,
  p,
  button,
  a {
    overflow-wrap: anywhere;
  }

  body {
    padding-bottom: 74px;
  }

  .hero {
    min-height: auto;
    padding: 18px 16px 54px;
  }

  .nav,
  .footer {
    align-items: flex-start;
    flex-direction: column;
    border-radius: 28px;
  }

  .music-toggle {
    right: 50%;
    bottom: max(12px, env(safe-area-inset-bottom));
    min-height: 44px;
    max-width: calc(100vw - 28px);
    padding: 7px 14px 7px 8px;
    transform: translateX(50%);
  }

  .music-toggle:hover {
    transform: translateX(50%);
  }

  .music-toggle span {
    width: 30px;
    height: 30px;
  }

  .guide-card {
    padding: 26px 20px;
    border-radius: 30px;
  }

  .guide-card h1 {
    font-size: clamp(30px, 8.5vw, 40px);
    line-height: 1.12;
  }

  .guide-card p {
    font-size: 16px;
    line-height: 1.75;
  }

  .guide-button {
    width: 100%;
    padding-inline: 18px;
    white-space: normal;
  }

  .hero-grid {
    gap: 28px;
    margin-top: 30px;
  }

  .hero-copy h1 {
    font-size: clamp(42px, 13vw, 58px);
    line-height: 1.04;
  }

  .lead {
    min-height: auto;
    font-size: 16px;
    line-height: 1.75;
  }

  .birthday-panel,
  .gallery {
    grid-template-columns: 1fr;
  }

  .birthday-panel div {
    min-height: auto;
    padding: 18px;
    border-radius: 24px;
  }

  .support-poster-section,
  .ritual-section,
  .wish-section,
  .gallery-section,
  .letter-section,
  .video-section,
  .playlist-section {
    padding: 48px 16px;
  }

  .support-poster-section {
    padding-top: 18px;
  }

  .support-poster-copy,
  .wish-card,
  .letter-shell,
  .video-card,
  .playlist-card {
    border-radius: 28px;
  }

  .support-poster-copy {
    padding: 22px;
  }

  .support-poster {
    border-width: 7px;
    border-radius: 28px;
  }

  .section-heading {
    margin-bottom: 24px;
  }

  .section-heading h2,
  .support-poster-copy h2 {
    font-size: clamp(28px, 8.6vw, 38px);
    line-height: 1.16;
  }

  .playlist-card {
    padding: 18px;
    border-radius: 26px;
  }

  .playlist-options {
    display: grid;
    grid-template-columns: 1fr;
  }

  .playlist-option {
    width: 100%;
    text-align: center;
  }

  .playlist-play {
    justify-self: stretch;
  }

  .portrait-frame {
    width: min(100%, 360px);
    transform: none;
  }

  .portrait-frame img {
    border-radius: 28px;
  }

  .floating-badge {
    padding: 8px 12px;
    font-size: 13px;
  }

  .badge-top {
    right: 12px;
  }

  .badge-bottom {
    left: 12px;
  }

  .photo-card,
  .photo-card.tall,
  .photo-card.wide {
    grid-column: auto;
    grid-row: auto;
    min-height: 320px;
    border-radius: 28px;
  }

  .photo-card figcaption {
    right: 10px;
    bottom: 10px;
    left: 10px;
    padding: 10px 12px;
  }

  .ritual-card,
  .gift-card {
    border-radius: 32px;
    min-height: auto;
    padding: 28px 22px;
  }

  .ritual-copy h3,
  .gift-copy h3 {
    font-size: clamp(28px, 8.8vw, 38px);
  }

  .ritual-button,
  .letter-button,
  .playlist-play {
    width: 100%;
  }

  .gift-box {
    width: 190px;
  }

  .cake-body {
    width: 190px;
  }

  .cake-top {
    top: 68px;
    width: 206px;
  }

  .cake-plate {
    width: 232px;
  }

  .candle {
    top: 28px;
  }

  .candle-one {
    transform: translateX(-66px);
  }

  .candle-three {
    transform: translateX(48px);
  }

  .lightbox {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 16px;
  }

  .lightbox-nav {
    position: absolute;
    z-index: 2;
    top: 50%;
    width: 42px;
    height: 58px;
    font-size: 36px;
    transform: translateY(-50%);
  }

  .lightbox-prev {
    left: 10px;
  }

  .lightbox-next {
    right: 10px;
  }

  .lightbox-frame {
    border-width: 7px;
    border-radius: 26px;
  }

  .photo-strip {
    padding-block: 16px;
  }

  .strip-track img {
    width: 150px;
    height: 190px;
    border-radius: 22px;
  }

  .letter-shell {
    gap: 18px;
    padding: 24px 20px;
  }

  .letter-card.open {
    max-height: 760px;
    padding: 22px;
  }

  .video-section {
    padding-top: 16px;
  }

  .video-card {
    padding: 8px;
  }

  .video-card::before {
    top: 14px;
    left: 16px;
    font-size: 12px;
  }

  .video-card video {
    max-height: 68vh;
    border-radius: 22px;
  }

  .playlist-option {
    white-space: normal;
    line-height: 1.35;
  }

  .footer {
    margin-bottom: 74px;
    padding: 22px 16px;
  }
}

@media (max-width: 390px) {
  .hero-copy h1 {
    font-size: 40px;
  }

  .cake-body {
    width: 176px;
    font-size: 50px;
  }

  .cake-top {
    width: 190px;
  }

  .cake-plate {
    width: 214px;
  }

  .gift-box {
    width: 176px;
    transform: scale(0.92);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}