/* ============================================================
   迟来的礼物 · A Belated Gift — acts.css
   六幕视觉：序幕星野 / 启封 / 四季 / 星河 / 花盒 / 信
   ============================================================ */

/* ============ 零 · 序幕 ============ */
.act-hero {
  height: 100svh; min-height: 620px; display: grid; place-items: center;
  overflow: hidden; padding: 0;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-aurora {
  position: absolute; inset: -18%; pointer-events: none;
  background:
    radial-gradient(42% 38% at 62% 30%, rgba(216, 179, 106, 0.11), transparent 62%),
    radial-gradient(38% 36% at 28% 70%, rgba(164, 69, 62, 0.09), transparent 64%),
    radial-gradient(30% 30% at 80% 82%, rgba(120, 140, 190, 0.05), transparent 60%);
  animation: auroraDrift 26s ease-in-out infinite alternate;
}
@keyframes auroraDrift { to { transform: translate(3%, -2.4%) scale(1.09); } }

.hero-inner { position: relative; text-align: center; padding: 0 var(--gutter); z-index: 2; }
.hero-eyebrow {
  font-family: var(--sans); font-size: clamp(10px, 1.4vw, 12px);
  letter-spacing: 0.62em; text-indent: 0.62em; color: var(--gold);
  margin-bottom: clamp(1.4rem, 3.4vh, 2.4rem);
}
.hero-title {
  font-size: clamp(3.4rem, 13vw, 9.5rem); font-weight: 900;
  line-height: 1.14; letter-spacing: 0.05em;
}
.hero-title .ch {
  display: inline-block;
  background: linear-gradient(168deg, #fdf7e6 0%, var(--gold-hi) 26%, var(--gold) 52%, #8f6f3d 88%, #c9a75f 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 12px 44px rgba(216, 179, 106, 0.28));
}
.hero-lines { margin-top: clamp(1.6rem, 4vh, 2.8rem); }
.hero-lines p { font-size: clamp(0.95rem, 2vw, 1.18rem); letter-spacing: 0.32em; text-indent: 0.32em; }
.hero-lines .dim { font-size: 0.82em; letter-spacing: 0.16em; text-indent: 0.16em; margin-top: 0.9rem; }

.scroll-hint {
  position: absolute; bottom: clamp(1.4rem, 5vh, 3.2rem); left: 50%; transform: translateX(-50%);
  display: grid; justify-items: center; gap: 0.9rem; z-index: 2;
  font-family: var(--sans); font-size: 10px; letter-spacing: 0.42em; text-indent: 0.42em; color: var(--ink-faint);
}
.scroll-hint i {
  width: 1px; height: 54px; overflow: hidden; position: relative;
  background: linear-gradient(to bottom, rgba(216, 179, 106, 0.05), rgba(216, 179, 106, 0.5));
}
.scroll-hint i::after {
  content: ""; position: absolute; left: 0; top: -40%; width: 100%; height: 40%;
  background: linear-gradient(to bottom, transparent, var(--gold-hi));
  animation: hintDrop 2.2s var(--ease-in-out) infinite;
}
@keyframes hintDrop { 0% { top: -40%; } 70%, 100% { top: 110%; } }

.hero-star {
  position: absolute; top: 24%; right: 21%; width: 20px; height: 20px; z-index: 2;
  filter: drop-shadow(0 0 10px rgba(243, 223, 174, 0.9));
}
.hero-star::before {
  content: ""; position: absolute; inset: 0;
  background: var(--gold-hi);
  clip-path: polygon(50% 0%, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0% 50%, 39% 39%);
  animation: starTwinkle 2.8s ease-in-out infinite;
}
.hero-star::after {
  content: ""; position: absolute; inset: -14px; border: 1px solid rgba(243, 223, 174, 0.4);
  border-radius: 50%; opacity: 0; animation: starRing 2.8s ease-out infinite;
}
@keyframes starTwinkle { 0%, 100% { transform: scale(0.7); opacity: 0.75; } 50% { transform: scale(1.05); opacity: 1; } }
@keyframes starRing { 0% { transform: scale(0.5); opacity: 0.8; } 100% { transform: scale(1.5); opacity: 0; } }
.hero-star.is-secret { animation: starSecret 0.5s var(--ease-out); }
@keyframes starSecret { 50% { transform: scale(2.4) rotate(22deg); filter: drop-shadow(0 0 30px rgba(243, 223, 174, 1)); } }

/* ============ 壹 · 启封 ============ */
.act-unseal { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; overflow: hidden; }
.bg-chars { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.bg-chars span {
  position: absolute; font-weight: 900; line-height: 1; user-select: none;
  font-size: clamp(9rem, 26vw, 22rem); color: transparent;
  -webkit-text-stroke: 1px rgba(216, 179, 106, 0.13);
  will-change: transform;
}
.bg-chars span:nth-child(1) { top: 4%; left: 2%; }
.bg-chars span:nth-child(2) { top: 44%; right: 3%; }
.bg-chars span:nth-child(3) { bottom: 2%; left: 14%; }
.bg-chars span:nth-child(4) { top: 12%; right: 27%; }
.act-unseal .act-head, .unseal-stage { position: relative; z-index: 1; }

.unseal-stage { padding-top: clamp(1rem, 4vh, 3rem); }
.envelope {
  position: relative; width: min(540px, 84vw); aspect-ratio: 1.55 / 1;
  perspective: 1400px; margin: 0 auto;
}
.envelope-body {
  position: absolute; inset: 0; overflow: hidden;
  background:
    linear-gradient(93deg, rgba(216, 179, 106, 0.05) 1px, transparent 1px) 0 0 / 100% 100%,
    linear-gradient(165deg, #241e14, #171310 72%);
  border: 1px solid rgba(216, 179, 106, 0.28);
  box-shadow: 0 44px 120px rgba(0, 0, 0, 0.68), inset 0 0 80px rgba(0, 0, 0, 0.5);
}
.envelope-body::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(216, 179, 106, 0.1), rgba(216, 179, 106, 0.02));
  clip-path: polygon(0 100%, 50% 34%, 100% 100%);
}
.envelope-body::after {
  content: ""; position: absolute; inset: 0; opacity: 0.5;
  background:
    linear-gradient(60deg, transparent 49.6%, rgba(216, 179, 106, 0.14) 50%, transparent 50.4%),
    linear-gradient(-60deg, transparent 49.6%, rgba(216, 179, 106, 0.14) 50%, transparent 50.4%);
}
.envelope-flap {
  position: absolute; top: 0; left: 0; width: 100%; height: 54%; z-index: 3;
  background: linear-gradient(180deg, #2c2518, #1d1811);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top center;
  transition: transform 1.2s var(--ease-out);
  filter: drop-shadow(0 14px 22px rgba(0, 0, 0, 0.5));
}
.envelope.is-open .envelope-flap { transform: rotateX(-168deg); }
.envelope-shadow {
  position: absolute; left: 8%; right: 8%; bottom: -7%; height: 18%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(0, 0, 0, 0.6), transparent 70%);
  filter: blur(6px); z-index: -1;
}
.envelope-seal {
  position: absolute; left: 50%; top: 54%; transform: translate(-50%, -50%); z-index: 5;
  width: 98px; height: 98px; border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, #f0cd8a, #b28d4e 42%, #6e5426 88%);
  border: 1px solid rgba(30, 20, 5, 0.55);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.6), inset 0 0 22px rgba(94, 70, 28, 0.85),
    inset 0 2px 3px rgba(255, 240, 200, 0.35);
  display: grid; place-items: center;
  transition: transform 0.5s var(--ease-out), opacity 0.5s;
}
.envelope-seal span { font-size: 2.3rem; font-weight: 600; color: #37280f; text-shadow: 0 1px 0 rgba(255, 236, 180, 0.45); }
.envelope-seal:hover { transform: translate(-50%, -50%) scale(1.08) rotate(-4deg); }
.envelope-seal.is-broken { transform: translate(-50%, -50%) scale(1.7); opacity: 0; }
.envelope-beam {
  position: absolute; left: 50%; top: 30%; width: 4px; height: 0; z-index: 4;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, rgba(243, 223, 174, 0.9), rgba(243, 223, 174, 0.15));
  box-shadow: 0 0 30px 8px rgba(243, 223, 174, 0.35);
  transition: height 0.9s var(--ease-out) 0.25s, opacity 0.6s ease 1.4s;
  opacity: 1;
}
.envelope.is-open .envelope-beam { height: 46%; }

.unseal-hint {
  text-align: center; margin-top: clamp(2rem, 5vh, 3.2rem);
  font-family: var(--sans); font-size: 11px; letter-spacing: 0.42em; text-indent: 0.42em;
  color: var(--gold); animation: hintPulse 2.6s ease-in-out infinite;
}
@keyframes hintPulse { 50% { opacity: 0.4; } }

.unseal-letter {
  position: relative; width: min(560px, 88vw); margin: clamp(2.2rem, 5vh, 3.2rem) auto 0;
  background: linear-gradient(172deg, #191510, #100e0a 65%);
  border: 1px solid var(--line);
  padding: clamp(1.9rem, 4.4vw, 3rem) clamp(1.5rem, 4vw, 2.6rem);
  box-shadow: 0 44px 120px rgba(0, 0, 0, 0.62);
  opacity: 0; transform: translateY(40px) scale(0.97);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}
.unseal-letter.is-open { opacity: 1; transform: none; }
.unseal-letter::before {
  content: ""; position: absolute; top: 10px; left: 10px; width: 18px; height: 18px;
  border-top: 1px solid rgba(216, 179, 106, 0.5); border-left: 1px solid rgba(216, 179, 106, 0.5);
}
.unseal-typed { font-size: clamp(0.98rem, 1.8vw, 1.08rem); line-height: 2.25; min-height: 11em; white-space: pre-wrap; }
.unseal-caret {
  display: inline-block; width: 1px; height: 1.05em; background: var(--gold);
  margin-left: 2px; vertical-align: text-bottom; animation: caretBlink 1s steps(1) infinite;
}
@keyframes caretBlink { 50% { opacity: 0; } }

/* ============ 贰 · 四季 ============ */
.act-seasons { padding-bottom: 0; }
.seasons-stage { position: relative; height: 100svh; min-height: 600px; overflow: hidden; }
#seasonCanvas { position: absolute; inset: 0; width: 100%; height: 100%; transition: background-color 1.2s ease; }
.season-dial {
  position: absolute; right: clamp(1.4rem, 4vw, 3.4rem); top: 50%; transform: translateY(-50%);
  display: grid; gap: 1.5rem; z-index: 3; text-align: center;
}
.season-dial span {
  position: relative; font-size: 0.95rem; letter-spacing: 0.2em; color: var(--ink-faint);
  transition: color 0.6s, text-shadow 0.6s; writing-mode: vertical-rl;
}
.season-dial span::after {
  content: ""; position: absolute; left: 50%; bottom: -0.85rem; transform: translateX(-50%);
  width: 3px; height: 3px; border-radius: 50%; background: var(--ink-faint); transition: 0.6s;
}
.season-dial span:last-child::after { display: none; }
.season-dial span.is-active { color: var(--gold-hi); text-shadow: 0 0 16px rgba(243, 223, 174, 0.7); }
.season-dial span.is-active::after { background: var(--gold-hi); box-shadow: 0 0 10px var(--gold-hi); }

.season-slide {
  position: absolute; inset: 0; z-index: 2;
  display: flex; align-items: center; justify-content: center;
  gap: clamp(2rem, 6vw, 6rem); padding: 0 var(--gutter);
  opacity: 0; visibility: hidden;
}
/* 特异性须高于 base.css 的 html.js .season-slide 隐藏规则 (0,2,1) */
html.js .season-slide.is-active,
.season-slide.is-active { opacity: 1; visibility: visible; }
.season-text { max-width: 430px; }
.season-text h3 {
  font-size: clamp(1.35rem, 3vw, 1.9rem); font-weight: 600;
  letter-spacing: 0.26em; color: var(--gold-hi); margin-bottom: 1.4rem;
}
.season-text p { color: rgba(236, 231, 221, 0.82); font-size: clamp(0.95rem, 1.8vw, 1.1rem); line-height: 2.2; }
.season-photo { width: clamp(250px, 30vw, 420px); flex-shrink: 0; }
.season-photo .photo-mat {
  padding: 10px; background: rgba(255, 255, 255, 0.025); border: 1px solid var(--line);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.62);
}
.season-photo img {
  aspect-ratio: 4 / 5; object-fit: cover; width: 100%;
  filter: saturate(0.82) contrast(1.07) brightness(0.9) sepia(0.08);
}
.season-photo figcaption {
  margin-top: 0.9rem; text-align: center; font-family: var(--sans);
  font-size: 10px; letter-spacing: 0.34em; text-indent: 0.34em; color: var(--ink-faint);
}

/* ============ 叁 · 星河 ============ */
.galaxy-stage { position: relative; height: 100svh; min-height: 600px; overflow: hidden; }
#constellationCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.galaxy-core {
  position: absolute; left: 50%; top: 50%; width: 46vmin; height: 46vmin;
  transform: translate(-50%, -50%); pointer-events: none;
  background: radial-gradient(circle, rgba(243, 223, 174, 0.16) 0%, rgba(216, 179, 106, 0.07) 34%, transparent 68%);
  mix-blend-mode: screen; animation: corePulse 5s ease-in-out infinite;
}
@keyframes corePulse { 50% { transform: translate(-50%, -50%) scale(1.14); opacity: 0.75; } }
.orbit { position: absolute; inset: 0; z-index: 2; }
.memory {
  position: absolute; left: 50%; top: 50%; width: clamp(148px, 16vw, 218px);
  cursor: pointer; will-change: transform, opacity;
}
.memory img {
  aspect-ratio: 1; object-fit: cover; width: 100%;
  border: 1px solid var(--line);
  filter: saturate(0.75) brightness(0.82) sepia(0.14);
  transition: filter 0.6s, border-color 0.6s, box-shadow 0.6s;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}
.memory figcaption { margin-top: 0.75rem; opacity: 0; transform: translateY(8px); transition: opacity 0.6s, transform 0.6s; }
.memory figcaption strong { display: block; font-size: 0.92rem; font-weight: 600; letter-spacing: 0.2em; color: var(--gold-hi); }
.memory figcaption span { font-size: 0.78rem; line-height: 1.75; color: var(--ink-dim); }
.memory:hover figcaption, .memory.is-front figcaption { opacity: 1; transform: none; }
.memory:hover img, .memory.is-front img { filter: none; border-color: rgba(216, 179, 106, 0.65); box-shadow: 0 26px 80px rgba(0, 0, 0, 0.7), 0 0 40px rgba(216, 179, 106, 0.12); }
.orbit.has-active .memory:not(.is-front) img { filter: brightness(0.32) saturate(0.3) sepia(0.2); }

/* ============ 肆 · 花盒 ============ */
.bloom-stage { position: relative; }
.giftbox-scene {
  height: 100svh; min-height: 600px; display: grid; place-items: center;
  position: relative; overflow: hidden;
  transition: height 1.1s var(--ease-out), opacity 0.8s ease, min-height 1.1s var(--ease-out);
}
/* 开盒后场景折叠，花园上移填满视口 */
.giftbox-scene.is-collapsed { height: 0; min-height: 0; opacity: 0; pointer-events: none; }
/* 矮视口下缩小花园，保证花园+许愿表单一屏内 */
@media (max-height: 760px) {
  .garden { max-width: 760px; }
  #gardenSvg { max-height: 44svh; }
  .wish-form {
    position: absolute; left: 0; right: 0; bottom: max(1rem, 2.5svh);
    margin: 0 auto; max-width: 560px;
  }
}
.giftbox { width: 240px; height: 240px; position: relative; perspective: 1000px; z-index: 2; }
.giftbox-glow {
  position: absolute; left: 50%; top: 50%; width: 130vmin; height: 130vmin;
  transform: translate(-50%, -50%); pointer-events: none; opacity: 0;
  background: radial-gradient(circle, rgba(243, 223, 174, 0.2) 0%, rgba(216, 179, 106, 0.08) 30%, transparent 62%);
  mix-blend-mode: screen; transition: opacity 1.4s ease;
}
.giftbox.is-open .giftbox-glow { opacity: 1; }
.giftbox-box, .giftbox-lid {
  position: absolute; left: 50%; top: 50%; transform-style: preserve-3d;
}
.giftbox-box { width: 220px; height: 220px; margin: -110px 0 0 -110px; transform: rotateX(-16deg) rotateY(-34deg); }
.giftbox-lid { width: 232px; height: 46px; margin: -150px 0 0 -116px; transform: rotateX(-16deg) rotateY(-34deg); transition: transform 1.3s var(--ease-out); z-index: 4; }
.giftbox.is-open .giftbox-lid { transform: rotateX(-16deg) rotateY(-34deg) translateY(-190px) rotateX(38deg); }
.gb-face { position: absolute; display: block; }
.giftbox-box .gb-face {
  width: 220px; height: 220px;
  background:
    linear-gradient(0deg, rgba(0, 0, 0, 0.34), transparent 30%),
    linear-gradient(160deg, #7c2f28, #57201d 70%);
  border: 1px solid rgba(216, 179, 106, 0.35);
  box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.45);
}
.gb-front { transform: translateZ(110px); }
.gb-back { transform: rotateY(180deg) translateZ(110px); }
.gb-left { transform: rotateY(-90deg) translateZ(110px); }
.gb-right { transform: rotateY(90deg) translateZ(110px); }
.gb-top { transform: rotateX(90deg) translateZ(110px); background: linear-gradient(160deg, #8a3a32, #682824) !important; }
.giftbox-box .gb-face::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 235, 200, 0.07) 46%, transparent 60%);
}
.giftbox-lid .gb-face {
  width: 232px; height: 46px;
  background: linear-gradient(160deg, #8a3a32, #642723);
  border: 1px solid rgba(216, 179, 106, 0.5);
  box-shadow: inset 0 0 26px rgba(0, 0, 0, 0.4);
}
.giftbox-lid .gb-front { transform: translateZ(116px); }
.giftbox-lid .gb-back { transform: rotateY(180deg) translateZ(116px); }
.giftbox-lid .gb-left { transform: rotateY(-90deg) translateZ(116px); width: 46px; }
.giftbox-lid .gb-right { transform: rotateY(90deg) translateZ(116px); width: 46px; }
.giftbox-lid .gb-top { transform: rotateX(90deg) translateZ(23px); width: 232px; }
.gb-ribbon {
  position: absolute; background: linear-gradient(180deg, #e8c987, #b28d4e 55%, #7a5c2e);
  box-shadow: 0 0 14px rgba(232, 201, 135, 0.25);
}
.giftbox-box .gb-ribbon-v { left: 50%; top: 0; width: 26px; height: 100%; transform: translateX(-50%); }
.giftbox-box .gb-ribbon-h { left: 0; top: 50%; width: 100%; height: 26px; transform: translateY(-50%); }
.giftbox-lid .gb-ribbon-v { left: 50%; top: 0; width: 26px; height: 100%; transform: translateX(-50%); }
.giftbox-lid .gb-ribbon-h { display: none; }
.giftbox.is-shaking { animation: boxShake 0.5s ease-in-out 3; }
@keyframes boxShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-7px) rotate(-1deg); }
  40% { transform: translateX(6px) rotate(0.8deg); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}
#burstCanvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 3; pointer-events: none; }

.garden { position: relative; width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 var(--gutter); }
#gardenSvg { width: 100%; height: auto; display: block; overflow: visible; }
.garden-stem { fill: none; stroke: rgba(216, 179, 106, 0.55); stroke-linecap: round; }
.garden-bloom { cursor: pointer; }
.garden-bloom circle.core { fill: rgba(243, 223, 174, 0.9); }
.garden-bloom path.petal { fill: rgba(216, 179, 106, 0.16); stroke: rgba(216, 179, 106, 0.5); transition: fill 0.5s, transform 0.6s var(--ease-out); transform-box: fill-box; transform-origin: center; }
.garden-bloom:hover path.petal, .garden-bloom.is-open path.petal { fill: rgba(243, 223, 174, 0.34); }
.garden-bloom text { fill: var(--gold-hi); font-family: var(--serif); font-weight: 600; text-anchor: middle; pointer-events: none; }
.garden-bloom .bloom-msg { fill: var(--ink); font-size: 13px; font-weight: 400; letter-spacing: 0.1em; }
.bloom-msgbox { fill: rgba(16, 14, 10, 0.92); stroke: rgba(216, 179, 106, 0.4); }

.wish-form {
  position: relative; z-index: 4; max-width: 560px; margin: clamp(2.5rem, 6vh, 4.5rem) auto clamp(4rem, 10vh, 7rem);
  text-align: center; padding: 0 var(--gutter);
}
.wish-prompt { display: block; font-size: 1.05rem; letter-spacing: 0.3em; color: var(--gold-hi); margin-bottom: 1.6rem; }
.wish-row { display: flex; gap: 1rem; align-items: stretch; }
.wish-row input {
  flex: 1; background: transparent; border: 0; border-bottom: 1px solid var(--line);
  padding: 0.85rem 0.2rem; font-family: var(--serif); font-size: 1rem; color: var(--ink);
  letter-spacing: 0.06em; transition: border-color 0.4s;
}
.wish-row input::placeholder { color: var(--ink-faint); }
.wish-row input:focus { outline: none; border-bottom-color: var(--gold); }
.wish-row button {
  border: 1px solid rgba(216, 179, 106, 0.55); padding: 0.7rem 1.9rem;
  font-family: var(--sans); font-size: 12px; letter-spacing: 0.4em; text-indent: 0.4em;
  color: var(--gold-hi); transition: background-color 0.4s, color 0.4s; white-space: nowrap;
}
.wish-row button:hover { background: rgba(216, 179, 106, 0.14); }
.wish-row button:disabled { opacity: 0.45; cursor: wait; }
.wish-count { margin-top: 1.1rem; font-family: var(--sans); font-size: 11px; letter-spacing: 0.24em; color: var(--ink-faint); }
.wish-thanks { margin-top: 0.9rem; font-size: 0.9rem; letter-spacing: 0.2em; color: var(--gold); }

/* ============ 伍 · 信 ============ */
.act-letter { overflow: hidden; }
#fireflyCanvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.letter-wrap { position: relative; max-width: 800px; margin: 0 auto; }
.paper {
  position: relative;
  background: linear-gradient(172deg, #191510, #100e0a 58%, #0c0a06);
  border: 1px solid var(--line);
  padding: clamp(2.4rem, 6vw, 4.4rem) clamp(1.6rem, 5vw, 3.8rem) clamp(2.8rem, 6vw, 4.4rem);
  box-shadow: 0 60px 150px rgba(0, 0, 0, 0.68), inset 0 0 100px rgba(216, 179, 106, 0.045);
}
.paper::before {
  content: ""; position: absolute; top: 0; left: 12%; right: 12%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(216, 179, 106, 0.65), transparent);
}
.p-line {
  font-size: clamp(1rem, 2vw, 1.14rem); line-height: 2.35;
  margin-bottom: 1.7rem; color: rgba(236, 231, 221, 0.93);
}
.paper-closing {
  text-align: center; font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  letter-spacing: 0.2em; text-indent: 0.2em; margin: clamp(2.4rem, 6vh, 3.4rem) 0 1.8rem;
  background: linear-gradient(160deg, #fdf7e6, var(--gold-hi) 40%, var(--gold) 75%, #9a7740);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.paper-sign {
  text-align: right; font-family: var(--hand);
  font-size: clamp(1.5rem, 3.2vw, 2.05rem); color: var(--gold-hi);
  letter-spacing: 0.08em;
}
.wax-seal {
  width: 98px; height: 98px; margin: 2.6rem 0 0 auto;
  border-radius: 48% 52% 51% 49% / 50% 47% 53% 50%;
  background: radial-gradient(circle at 34% 30%, #c4736b, #a4453e 52%, #5e1f1a 92%);
  border: 1px solid rgba(20, 8, 6, 0.6);
  box-shadow: inset 0 0 20px rgba(40, 10, 8, 0.7), inset 0 2px 3px rgba(255, 190, 170, 0.25),
    0 16px 40px rgba(0, 0, 0, 0.55);
  display: grid; place-items: center; transform: scale(0);
}
.wax-seal span { font-size: 2.1rem; font-weight: 600; color: rgba(255, 236, 210, 0.88); text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55); }
.opened-note {
  text-align: center; margin-top: clamp(2rem, 5vh, 3rem);
  font-family: var(--sans); font-size: 11px; letter-spacing: 0.28em; color: var(--ink-faint);
}
.letter-actions { text-align: center; }
.replay {
  display: inline-block; margin-top: 2.6rem; border: 1px solid var(--line);
  padding: 0.85rem 2.8rem; font-family: var(--sans); font-size: 12px;
  letter-spacing: 0.44em; text-indent: 0.44em; color: var(--ink-dim);
  transition: border-color 0.4s, color 0.4s, background-color 0.4s;
}
.replay:hover { border-color: rgba(216, 179, 106, 0.65); color: var(--gold-hi); background: rgba(216, 179, 106, 0.08); }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .season-slide { flex-direction: column; justify-content: center; gap: 2rem; }
  .season-photo { width: clamp(200px, 46vw, 300px); }
  .starmap { display: none; }
  .season-dial { right: 0.9rem; }
}
@media (max-width: 600px) {
  .act-head { flex-direction: column; gap: 0.6rem; }
  .sound-toggle .st-label { display: none; }
  .season-text h3 { font-size: 1.25rem; }
}