/* ═══════════════════════════════════════
   莊詠翔 & 趙芃媗 · 電子喜帖
   簡約韓式 × 華麗金箔
   ═══════════════════════════════════════ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* 色票 */
  --cream:      #faf7f2;
  --warm-white: #fdfcfa;
  --ivory:      #ffffff;
  --sand:       #e8ddd0;
  --taupe:      #c4b09a;
  --brown:      #8a7060;
  --dark:       #2e221a;
  --text:       #3d2d22;
  --muted:      #9a8070;
  --brown-dark: #6b5747; /* 表單文字加深，確保對比足夠、不被背景吃掉 */

  /* 金箔漸層 */
  --gold-1: #c9a76a;
  --gold-2: #f0dfb8;
  --gold-3: #b18f57;
  --gold-grad: linear-gradient(115deg, var(--gold-3) 0%, var(--gold-1) 22%, var(--gold-2) 46%, var(--gold-1) 62%, var(--gold-3) 100%);

  /* 字型 */
  --serif:   'Noto Serif TC', 'Cormorant Garamond', serif;
  --sans:    'Taipei Sans TC', 'Noto Sans TC', sans-serif;
  --display: 'Italiana', 'Cormorant Garamond', serif;
  --script:  'Cormorant Garamond', serif;

  --ease: cubic-bezier(.22,.68,.36,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--cream);
  overflow-x: hidden;
  letter-spacing: .04em;
}

img { display: block; width: 100%; height: 100%; object-fit: cover; }

::selection { background: var(--taupe); color: #fff; }

/* ── 金箔文字 ── */
.gold-text {
  background: var(--gold-grad);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: shimmer 7s linear infinite;
}
@keyframes shimmer {
  0%   { background-position: 0% center; }
  100% { background-position: 220% center; }
}

/* ── 紙質顆粒 ── */
.grain {
  position: fixed; inset: 0;
  pointer-events: none; z-index: 9998;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── 飄落花瓣 ── */
.petals { position: fixed; inset: 0; pointer-events: none; z-index: 2; overflow: hidden; }
.petal {
  position: absolute; top: -6vh;
  border-radius: 50% 0 50% 0;
  background: linear-gradient(140deg, #f3e6d6, #e4d3bd);
  opacity: 0;
  animation: fall linear infinite;
}
@keyframes fall {
  0%   { transform: translate3d(0,-10vh,0) rotate(0deg);      opacity: 0; }
  10%  { opacity: .55; }
  90%  { opacity: .35; }
  100% { transform: translate3d(14vw,110vh,0) rotate(540deg);  opacity: 0; }
}

/* ═══════════ 開場簾幕 ═══════════ */
.veil {
  position: fixed; inset: 0; z-index: 9999;
  display: grid; place-items: center;
  background: var(--warm-white);
  transition: opacity 1s var(--ease), visibility 1s;
}
.veil.hidden { opacity: 0; visibility: hidden; }
.veil__inner { text-align: center; animation: veilIn 1.4s var(--ease) both; }
.veil__crest { width: 76px; height: 76px; margin: 0 auto 22px; display: block; animation: spinIn 2s var(--ease) both; }
.veil__names {
  font-family: var(--serif); font-weight: 300;
  font-size: 20px; letter-spacing: .5em; color: var(--dark);
  margin-bottom: 12px; text-indent: .5em;
}
.veil__date {
  font-size: 10px; letter-spacing: .6em; color: var(--taupe); text-indent: .6em;
}
@keyframes veilIn { from { opacity: 0; transform: translateY(14px);} to { opacity: 1; transform: none; } }
@keyframes spinIn { from { opacity: 0; transform: rotate(-40deg) scale(.7);} to { opacity: 1; transform: none; } }

/* ═══════════ 出席回覆提醒彈窗 ═══════════ */
.rsvp-modal {
  position: fixed; inset: 0; z-index: 9996;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: rgba(46,34,26,.55);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  opacity: 0; visibility: hidden;
  transition: opacity .45s var(--ease), visibility .45s;
}
.rsvp-modal.open { opacity: 1; visibility: visible; }
.rsvp-modal__panel {
  position: relative; max-width: 380px; width: 100%;
  text-align: center; padding: 56px 36px 40px;
  transform: translateY(16px) scale(.97); opacity: 0;
  transition: transform .5s var(--ease), opacity .5s var(--ease);
}
.rsvp-modal.open .rsvp-modal__panel { transform: none; opacity: 1; }
.rsvp-modal__close {
  position: absolute; top: 14px; right: 14px;
  width: 34px; height: 34px; display: grid; place-items: center;
  background: none; border: none; color: var(--muted); font-size: 13px; cursor: pointer;
  transition: color .3s, transform .3s;
}
.rsvp-modal__close:hover { color: var(--dark); transform: rotate(90deg); }
.rsvp-modal__icon { display: block; font-size: 28px; margin-bottom: 16px; }
.rsvp-modal__title {
  display: block; font-family: var(--serif); font-size: 18px; font-weight: 300;
  letter-spacing: .3em; margin-bottom: 18px;
}
.rsvp-modal__text {
  font-size: 14.5px; color: var(--muted); letter-spacing: .1em; line-height: 2.1;
}
.rsvp-modal .ornament { margin: 26px auto; }
.rsvp-modal__actions { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.rsvp-modal__dismiss {
  background: none; border: none; font-family: var(--sans); font-size: 12px;
  letter-spacing: .2em; color: var(--taupe); cursor: pointer;
  text-decoration: underline; text-underline-offset: 4px; transition: color .3s;
}
.rsvp-modal__dismiss:hover { color: var(--dark); }

/* ═══════════ 導覽列 ═══════════ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; padding: 0 40px;
  background: rgba(250,247,242,0);
  backdrop-filter: blur(0px);
  border-bottom: .5px solid transparent;
  transition: all .45s var(--ease);
}
nav.solid {
  background: rgba(250,247,242,.9);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--sand);
}
.nav__logo {
  font-family: var(--serif); font-size: 13px; font-weight: 400;
  letter-spacing: .35em; color: var(--brown); text-decoration: none;
}
.nav__logo em { font-family: var(--script); font-style: italic; color: var(--gold-1); }
.nav__links { display: flex; gap: 30px; list-style: none; }
.nav__links a {
  position: relative; font-size: 12.5px; letter-spacing: .28em;
  color: var(--muted); text-decoration: none; transition: color .3s;
}
.nav__links a::after {
  content: ''; position: absolute; left: 0; bottom: -6px;
  width: 0; height: .5px; background: var(--gold-1); transition: width .35s var(--ease);
}
.nav__links a:hover { color: var(--dark); }
.nav__links a:hover::after { width: 100%; }

.nav__rsvp {
  font-size: 12px; letter-spacing: .28em; color: var(--brown);
  text-decoration: none; padding: 8px 22px;
  border: .5px solid var(--taupe); position: relative; overflow: hidden;
  transition: color .35s;
}
.nav__rsvp::before {
  content: ''; position: absolute; inset: 0;
  background: var(--gold-grad); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease); z-index: -1;
}
.nav__rsvp:hover { color: #fff; }
.nav__rsvp:hover::before { transform: scaleX(1); }
.nav__rsvp { z-index: 1; }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.hamburger span { display: block; width: 24px; height: .5px; background: var(--brown); transition: .35s var(--ease); }
.hamburger.open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 64px; left: 0; right: 0; z-index: 99;
  display: flex; flex-direction: column; gap: 20px;
  padding: 28px 40px 34px;
  background: rgba(250,247,242,.97);
  backdrop-filter: blur(14px);
  border-bottom: .5px solid var(--sand);
  transform: translateY(-120%); transition: transform .5s var(--ease);
}
.mobile-menu.open { transform: none; }
.mobile-menu a { font-size: 15px; letter-spacing: .28em; color: var(--muted); text-decoration: none; }

/* ═══════════ HERO ═══════════ */
#hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 110px 24px 70px;
  overflow: hidden; background: var(--warm-white);
}
.hero__bg {
  position: absolute; inset: -8% -4%;
  background: url('https://images.unsplash.com/photo-1519741497674-611481863552?w=1600&q=80') center/cover no-repeat;
  filter: sepia(14%) saturate(78%) brightness(1.04);
  transform: scale(1.06);
  animation: kenburns 22s ease-in-out infinite alternate;
  z-index: 0;
}
@keyframes kenburns { from { transform: scale(1.06) translateY(0); } to { transform: scale(1.14) translateY(-1.5%); } }

.hero__wash {
  position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(120% 85% at 50% 35%, rgba(253,252,250,.22) 0%, rgba(250,247,242,.62) 55%, rgba(253,252,250,.94) 88%, var(--warm-white) 100%);
}

/* 細金框 */
.hero__frame {
  position: absolute; inset: 26px; z-index: 2; pointer-events: none;
  border: .5px solid rgba(201,167,106,.42);
}
.hero__frame::before, .hero__frame::after {
  content: ''; position: absolute; width: 28px; height: 28px;
  border: solid rgba(201,167,106,.8); border-width: 0;
}
.hero__frame::before { top: -1px; left: -1px;  border-top-width: 1.5px; border-left-width: 1.5px; }
.hero__frame::after  { bottom: -1px; right: -1px; border-bottom-width: 1.5px; border-right-width: 1.5px; }

.hero__content { position: relative; z-index: 3; }

.hero__eyebrow {
  font-family: var(--display);
  font-size: 12px; letter-spacing: .62em; text-indent: .62em;
  color: var(--taupe); text-transform: uppercase; margin-bottom: 34px;
}

.hero__names {
  font-family: var(--serif); font-weight: 200;
  font-size: clamp(42px, 9vw, 74px);
  letter-spacing: .22em; text-indent: .22em; line-height: 1.28;
  color: var(--dark);
}
.reveal-char {
  display: inline-block; opacity: 0;
  transform: translateY(26px) scale(.94); filter: blur(6px);
  animation: charIn 1.1s var(--ease) forwards;
}
@keyframes charIn { to { opacity: 1; transform: none; filter: blur(0); } }
.hero__names:nth-of-type(1) .reveal-char:nth-child(1) { animation-delay: 1.55s; }
.hero__names:nth-of-type(1) .reveal-char:nth-child(2) { animation-delay: 1.68s; }
.hero__names:nth-of-type(1) .reveal-char:nth-child(3) { animation-delay: 1.81s; }
.hero__names:nth-of-type(2) .reveal-char:nth-child(1) { animation-delay: 2.06s; }
.hero__names:nth-of-type(2) .reveal-char:nth-child(2) { animation-delay: 2.19s; }
.hero__names:nth-of-type(2) .reveal-char:nth-child(3) { animation-delay: 2.32s; }

.hero__amp {
  display: block; margin: 6px 0 8px;
  font-family: var(--script); font-style: italic; font-weight: 300;
  font-size: clamp(26px, 5vw, 42px);
  letter-spacing: .2em;
  background: var(--gold-grad); background-size: 220% auto;
  -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
  animation: shimmer 7s linear infinite, fadeUp 1.2s var(--ease) 1.9s both;
}

.hero__names-en {
  font-family: var(--display); font-size: 13px;
  letter-spacing: .5em; text-indent: .5em; color: var(--muted);
  margin-top: 16px;
  animation: fadeUp 1.2s var(--ease) 2.5s both;
}

.hero__date {
  font-size: 13px; letter-spacing: .55em; text-indent: .55em; color: var(--text);
  animation: fadeUp 1.2s var(--ease) 2.9s both;
}
.hero__date em { font-family: var(--display); font-style: normal; color: var(--taupe); letter-spacing: .3em; }

.hero__venue {
  font-size: 11px; letter-spacing: .3em; color: var(--muted); margin-top: 10px;
  animation: fadeUp 1.2s var(--ease) 3.05s both;
}

@keyframes fadeUp { from { opacity: 0; transform: translateY(18px);} to { opacity: 1; transform: none; } }

/* 倒數計時 */
.countdown {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  margin: 40px auto 0; padding: 20px 26px;
  border: .5px solid rgba(201,167,106,.4);
  background: rgba(255,255,255,.42);
  backdrop-filter: blur(6px);
  max-width: 440px;
  animation: fadeUp 1.2s var(--ease) 3.25s both;
}
.countdown i { width: .5px; height: 26px; background: var(--sand); }
.countdown__cell { display: flex; flex-direction: column; gap: 4px; min-width: 52px; }
.countdown__cell b {
  font-family: var(--display); font-size: 24px; font-weight: 400; line-height: 1;
  background: var(--gold-grad); background-size: 220% auto;
  -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
  animation: shimmer 7s linear infinite;
}
.countdown__cell span { font-size: 9px; letter-spacing: .24em; color: var(--muted); text-transform: uppercase; }

.hero__scroll {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  margin-top: 46px; animation: fadeUp 1.2s var(--ease) 3.45s both;
}
.hero__scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--taupe), transparent);
  animation: drop 2.2s ease-in-out infinite;
}
.hero__scroll-text { font-family: var(--display); font-size: 10px; letter-spacing: .4em; color: var(--taupe); }
@keyframes drop { 0%,100% { transform: translateY(0); opacity: 1; } 50% { transform: translateY(7px); opacity: .5; } }

/* ═══════════ 通用區塊 ═══════════ */
section { padding: 110px 24px; position: relative; }
#invitation, #gallery, #rsvp { background: var(--warm-white); }
#about, #story, #transport { background: var(--cream); }

.wrap { max-width: 900px; margin: 0 auto; }
.wrap--narrow { max-width: 660px; }
.wrap--wide   { max-width: 1060px; }

.tag {
  display: block; text-align: center;
  font-family: var(--display); font-size: 11px;
  letter-spacing: .55em; text-indent: .55em;
  color: var(--taupe); text-transform: uppercase; margin-bottom: 16px;
}
.title {
  text-align: center; font-family: var(--serif); font-weight: 200;
  font-size: clamp(26px, 5vw, 38px);
  letter-spacing: .18em; text-indent: .18em; color: var(--dark);
  margin-bottom: 56px;
}

/* 花飾分隔 */
.ornament { display: flex; align-items: center; justify-content: center; gap: 14px; margin: 44px auto; }
.ornament__line { width: 70px; height: .5px; background: linear-gradient(to right, transparent, var(--taupe), transparent); }
.ornament__mark { width: 34px; height: 14px; fill: var(--gold-1); opacity: .9; }
.ornament--light .ornament__line { background: linear-gradient(to right, transparent, rgba(201,167,106,.7), transparent); }
.ornament--dark .ornament__line { background: linear-gradient(to right, transparent, rgba(201,167,106,.45), transparent); }

/* 卡片 */
.card {
  position: relative; background: var(--ivory);
  border: .5px solid var(--sand);
  padding: 62px 50px;
  box-shadow: 0 18px 60px -30px rgba(46,34,26,.22);
}
.card--gold::before, .card--gold::after {
  content: ''; position: absolute; width: 26px; height: 26px;
  border: solid var(--gold-1); border-width: 0; opacity: .85;
}
.card--gold::before { top: 12px; left: 12px;  border-top-width: 1px; border-left-width: 1px; }
.card--gold::after  { bottom: 12px; right: 12px; border-bottom-width: 1px; border-right-width: 1px; }

/* ═══════════ 喜帖卡 ═══════════ */
.card__seal {
  position: absolute; top: -26px; left: 50%; transform: translateX(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--warm-white); color: var(--gold-1);
  display: grid; place-items: center;
}
.card__seal svg { width: 52px; height: 52px; }

#invitation .card { text-align: center; padding-top: 74px; }

.card__families {
  font-size: 14px; color: var(--muted); letter-spacing: .12em; line-height: 2.3;
  margin-bottom: 26px;
}
.card__families strong { font-weight: 400; color: var(--text); }

.card__greeting {
  font-family: var(--serif); font-size: 15.5px; font-weight: 300;
  color: var(--muted); letter-spacing: .2em; margin-bottom: 34px;
}

.card__names {
  font-family: var(--serif); font-weight: 200;
  font-size: clamp(30px, 6.5vw, 50px);
  letter-spacing: .2em; text-indent: .2em; line-height: 1.42;
}
.card__amp {
  display: block; font-family: var(--script); font-style: italic;
  font-size: clamp(20px, 4vw, 30px); color: var(--gold-1);
  letter-spacing: .3em; margin: 4px 0;
}

.card__message {
  font-family: var(--serif); font-size: 16px; font-weight: 300;
  color: var(--muted); letter-spacing: .14em; line-height: 2.5;
  margin: 34px 0 0;
}

.card__details {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 28px; align-items: start;
  padding-top: 38px; border-top: .5px solid var(--sand);
}
.detail__sep { width: .5px; background: var(--sand); align-self: stretch; }
.detail__label {
  display: block; font-family: var(--display); font-size: 10px;
  letter-spacing: .4em; text-indent: .4em; color: var(--gold-1); margin-bottom: 12px;
}
.detail__value {
  font-family: var(--serif); font-size: 17px; font-weight: 400;
  color: var(--dark); letter-spacing: .1em; line-height: 1.7;
}
.detail__sub { font-size: 13px; color: var(--muted); letter-spacing: .06em; margin-top: 5px; }

/* ═══════════ 關於我們 ═══════════ */
.profile {
  display: grid; grid-template-columns: 0.9fr 1.1fr;
  gap: 60px; align-items: center;
}
.profile--reverse { direction: rtl; }
.profile--reverse > * { direction: ltr; }

/* 韓式拱形相框 */
.arch { position: relative; padding: 12px; }
.arch::before {
  content: ''; position: absolute; inset: 0;
  border: .5px solid var(--gold-1); opacity: .55;
  border-radius: 999px 999px 4px 4px;
}
.arch__inner {
  position: relative; aspect-ratio: 3/4; overflow: hidden;
  border-radius: 999px 999px 3px 3px;
  background: var(--sand);
}
.arch__inner img { filter: sepia(10%) saturate(82%); transition: transform .9s var(--ease); }
.arch:hover .arch__inner img { transform: scale(1.04); }
.arch__placeholder {
  width: 100%; height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  color: var(--taupe);
}
.arch__placeholder span { font-size: 34px; opacity: .45; }
.arch__placeholder small { font-size: 11px; letter-spacing: .2em; }

.profile__role {
  display: block; font-family: var(--display); font-size: 10px;
  letter-spacing: .42em; text-indent: .42em; color: var(--gold-1); margin-bottom: 16px;
}
.profile__text h3 {
  font-family: var(--serif); font-weight: 200;
  font-size: clamp(24px, 4.2vw, 33px);
  letter-spacing: .2em; text-indent: .2em; margin-bottom: 24px;
}
.profile__text p { font-size: 16px; color: var(--muted); letter-spacing: .06em; line-height: 2.4; }

/* ═══════════ 時間軸 ═══════════ */
.timeline { list-style: none; position: relative; padding-left: 34px; margin-bottom: 20px; }
.timeline::before {
  content: ''; position: absolute; left: 5px; top: 8px; bottom: 8px;
  width: .5px; background: linear-gradient(to bottom, transparent, var(--taupe) 12%, var(--taupe) 88%, transparent);
}
.timeline__item { position: relative; padding-bottom: 46px; }
.timeline__item::before {
  content: ''; position: absolute; left: -34px; top: 9px;
  width: 11px; height: 11px; transform: rotate(45deg);
  background: var(--gold-grad); background-size: 200% auto;
  box-shadow: 0 0 0 4px var(--cream);
}
.timeline__year {
  font-family: var(--display); font-size: 11px;
  letter-spacing: .34em; color: var(--gold-1); display: block; margin-bottom: 6px;
}
.timeline__item h4 {
  font-family: var(--serif); font-size: 18px; font-weight: 400;
  letter-spacing: .14em; color: var(--dark); margin-bottom: 8px;
}
.timeline__item p { font-size: 15.5px; color: var(--muted); letter-spacing: .05em; line-height: 2.2; }

.quote { text-align: center; margin-top: 20px; }
.quote p {
  font-family: var(--serif); font-size: 16.5px; font-weight: 300;
  color: var(--muted); letter-spacing: .14em; line-height: 2.6;
}
.quote cite {
  display: block; margin-top: 22px; font-style: normal;
  font-family: var(--display); font-size: 11px; letter-spacing: .34em; color: var(--gold-1);
}

/* ═══════════ 藝廊 ═══════════ */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.gallery__item { overflow: hidden; background: var(--sand); position: relative; }
.gallery__item::after {
  content: ''; position: absolute; inset: 8px;
  border: .5px solid rgba(255,255,255,.5);
  opacity: 0; transition: opacity .45s var(--ease); pointer-events: none;
}
.gallery__item:hover::after { opacity: 1; }
.gallery__item img { transition: transform .8s var(--ease); filter: sepia(10%) saturate(82%); }
.gallery__item:hover img { transform: scale(1.05); }

.gallery__item:nth-child(1) { grid-column: span 2; aspect-ratio: 16/9; }
.gallery__item:nth-child(2) { aspect-ratio: 3/4; }
.gallery__item:nth-child(3),
.gallery__item:nth-child(4),
.gallery__item:nth-child(5) { aspect-ratio: 1/1; }
.gallery__item:nth-child(6) { grid-column: span 2; aspect-ratio: 16/7; }

.gallery__ph {
  width: 100%; height: 100%; min-height: 180px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  color: var(--taupe);
}
.gallery__ph span { font-size: 28px; opacity: .45; }
.gallery__ph small { font-size: 11px; letter-spacing: .2em; }

/* ═══════════ 交通 ═══════════ */
.venue { text-align: center; margin-bottom: 34px; padding: 52px 40px; }
.venue__label {
  display: block; font-family: var(--display); font-size: 10px;
  letter-spacing: .45em; text-indent: .45em; color: var(--gold-1); margin-bottom: 16px;
}
.venue__name {
  font-family: var(--serif); font-weight: 200; font-size: 26px;
  letter-spacing: .22em; text-indent: .22em; margin-bottom: 14px;
}
.venue__addr { font-size: 15px; color: var(--muted); letter-spacing: .1em; line-height: 2.2; }

.btn-line {
  display: inline-block; margin-top: 22px;
  font-size: 12px; letter-spacing: .3em; color: var(--brown);
  text-decoration: none; padding-bottom: 4px;
  border-bottom: .5px solid var(--taupe); transition: .3s var(--ease);
}
.btn-line em { font-style: normal; transition: transform .3s var(--ease); display: inline-block; }
.btn-line:hover { color: var(--dark); border-color: var(--gold-1); }
.btn-line:hover em { transform: translateX(4px); }

.tcards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tcard {
  background: var(--ivory); border: .5px solid var(--sand);
  padding: 34px 30px; transition: .45s var(--ease);
}
.tcard:hover { border-color: var(--gold-1); transform: translateY(-3px); box-shadow: 0 16px 40px -26px rgba(46,34,26,.3); }
.tcard__icon { display: block; font-size: 21px; margin-bottom: 18px; }
.tcard h4 {
  font-family: var(--serif); font-size: 16px; font-weight: 400;
  letter-spacing: .2em; color: var(--dark); margin-bottom: 14px;
}
.tcard ul { list-style: none; }
.tcard li {
  position: relative; padding-left: 14px;
  font-size: 15px; color: var(--muted); letter-spacing: .05em; line-height: 2.15;
}
.tcard li::before {
  content: ''; position: absolute; left: 0; top: 13px;
  width: 6px; height: .5px; background: var(--gold-1);
}

/* 官方交通圖卡 */
.tc-cards {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  margin-top: 40px;
}
.tc-card {
  position: relative; padding: 0; border: .5px solid var(--sand);
  background: var(--ivory); cursor: zoom-in; overflow: hidden;
  transition: border-color .35s, transform .35s var(--ease);
}
.tc-card img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.tc-card:hover { border-color: var(--gold-1); transform: translateY(-3px); }
.tc-card:hover img { transform: scale(1.04); }
.tc-card__hint {
  position: absolute; right: 10px; bottom: 10px;
  font-family: var(--display); font-size: 10px; letter-spacing: .18em;
  color: #fff; background: rgba(46,34,26,.55); backdrop-filter: blur(4px);
  padding: 6px 12px; opacity: 0; transition: opacity .35s;
}
.tc-card:hover .tc-card__hint { opacity: 1; }

/* 燈箱 */
.lightbox {
  position: fixed; inset: 0; z-index: 9997;
  display: flex; align-items: center; justify-content: center;
  padding: 40px; background: rgba(20,15,10,.9);
  opacity: 0; visibility: hidden; transition: opacity .35s var(--ease), visibility .35s;
}
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox img {
  max-width: 100%; max-height: 100%; width: auto; height: auto;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.6);
  transform: scale(.96); transition: transform .35s var(--ease);
}
.lightbox.open img { transform: none; }
.lightbox__close {
  position: absolute; top: 24px; right: 28px;
  width: 42px; height: 42px; border-radius: 50%;
  background: rgba(255,255,255,.08); border: .5px solid rgba(255,255,255,.3);
  color: #fff; font-size: 15px; cursor: pointer;
  transition: background .3s, transform .3s;
}
.lightbox__close:hover { background: rgba(255,255,255,.18); transform: rotate(90deg); }

/* ═══════════ RSVP ═══════════ */
.rsvp__note {
  text-align: center; font-size: 15px; color: var(--brown-dark);
  letter-spacing: .12em; line-height: 2.4; margin-bottom: 44px;
}
.rsvp__note strong { font-weight: 400; color: var(--text); }

.form { display: flex; flex-direction: column; gap: 22px; padding: 48px 42px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 9px; }
.field label {
  font-family: var(--display); font-size: 13px;
  letter-spacing: .28em; color: var(--brown-dark); text-transform: uppercase;
}
.field input, .field select, .field textarea {
  font-family: var(--sans); font-size: 16px; font-weight: 300;
  color: var(--text); letter-spacing: .06em;
  padding: 14px 16px; width: 100%;
  background: var(--warm-white); border: .5px solid var(--sand);
  border-radius: 0; outline: none;
  appearance: none; -webkit-appearance: none;
  transition: border-color .3s, box-shadow .3s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--brown); }
.field select {
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23c9a76a' stroke-width='.9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--gold-1); box-shadow: 0 0 0 3px rgba(201,167,106,.12);
}
.field textarea { resize: vertical; min-height: 104px; line-height: 1.9; }
.field.invalid input, .field.invalid select { border-color: #c98a6a; }
.field input:disabled, .field select:disabled, .field textarea:disabled { opacity: .45; cursor: not-allowed; background-color: #f2ede4; }
.field__hint { font-size: 12.5px; color: var(--brown-dark); letter-spacing: .04em; margin-top: -3px; }

.btn-solid {
  position: relative; overflow: hidden; z-index: 1;
  font-family: var(--sans); font-size: 11px; font-weight: 400;
  letter-spacing: .38em; text-indent: .38em; color: var(--cream);
  background: var(--dark); border: none; padding: 19px 40px;
  cursor: pointer; margin-top: 8px; transition: color .35s;
}
.btn-solid::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background: var(--gold-grad); background-size: 200% auto;
  transform: translateY(101%); transition: transform .45s var(--ease);
}
.btn-solid:hover { color: #fff; }
.btn-solid:hover::before { transform: none; }

.form-success { text-align: center; padding: 60px 40px; }
.form-success__icon { display: block; font-size: 34px; margin-bottom: 18px; }
.form-success p {
  font-family: var(--serif); font-size: 17px; font-weight: 300;
  color: var(--dark); letter-spacing: .18em; line-height: 2.1;
}
.form-success p small {
  display: block; font-family: var(--sans); font-size: 12.5px;
  letter-spacing: .1em; color: var(--brown-dark); margin-top: 8px;
}

/* ═══════════ 頁尾 ═══════════ */
footer {
  text-align: center; padding: 74px 24px 60px;
  background: var(--dark); color: var(--taupe);
}
footer .ornament { margin: 0 auto 30px; }
.footer__names {
  font-family: var(--serif); font-weight: 200; font-size: 21px;
  letter-spacing: .45em; text-indent: .45em; color: #fff; margin-bottom: 14px;
}
.footer__names em { font-family: var(--script); font-style: italic; color: var(--gold-1); }
.footer__date { font-size: 11px; letter-spacing: .38em; color: var(--taupe); margin-bottom: 28px; }
.footer__note { font-size: 13px; letter-spacing: .12em; color: #6b5747; line-height: 2.1; }

/* 回到頂端 */
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  width: 42px; height: 42px; display: grid; place-items: center;
  background: rgba(253,252,250,.9); backdrop-filter: blur(8px);
  border: .5px solid var(--taupe); color: var(--brown);
  text-decoration: none; font-size: 14px;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: .4s var(--ease);
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--gold-1); color: var(--dark); }

/* 背景音樂開關 */
.music-toggle {
  position: fixed; right: 24px; bottom: 76px; z-index: 90;
  width: 42px; height: 42px; display: grid; place-items: center;
  background: rgba(253,252,250,.9); backdrop-filter: blur(8px);
  border: .5px solid var(--taupe); color: var(--brown);
  cursor: pointer; transition: .4s var(--ease);
}
.music-toggle:hover { border-color: var(--gold-1); color: var(--dark); }
.music-toggle svg { width: 16px; height: 16px; position: relative; z-index: 1; transition: color .4s var(--ease); }
.music-toggle__mute {
  position: absolute; width: 24px; height: .5px; background: currentColor;
  transform: rotate(45deg); opacity: 0; transition: opacity .3s var(--ease);
}
.music-toggle:not(.is-playing) .music-toggle__mute { opacity: .85; }
.music-toggle.is-playing { border-color: var(--gold-1); color: var(--gold-1); }
.music-toggle.is-playing svg { animation: music-pulse 1.8s ease-in-out infinite; }
@keyframes music-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.14); }
}

/* ═══════════ 進場動畫 ═══════════ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ═══════════ 響應式 ═══════════ */
@media (max-width: 900px) {
  .profile { grid-template-columns: 1fr; gap: 32px; }
  .profile--reverse { direction: ltr; }
  .arch { max-width: 320px; margin: 0 auto; }
  .tcards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .nav__links, .nav__rsvp { display: none; }
  .hamburger { display: flex; }

  section { padding: 78px 20px; }
  .card { padding: 46px 26px; }
  #invitation .card { padding-top: 62px; }

  .card__details { grid-template-columns: 1fr; gap: 26px; }
  .detail__sep { width: 100%; height: .5px; }

  .gallery { grid-template-columns: 1fr 1fr; }
  .gallery__item:nth-child(1),
  .gallery__item:nth-child(6) { grid-column: span 2; aspect-ratio: 16/9; }
  .gallery__item:nth-child(2) { aspect-ratio: 1/1; }

  .tcards { grid-template-columns: 1fr; }
  .tc-cards { grid-template-columns: 1fr; }
  .form { padding: 34px 24px; }
  .form__row { grid-template-columns: 1fr; }

  .countdown { gap: 8px; padding: 16px 14px; }
  .countdown__cell { min-width: 44px; }
  .countdown__cell b { font-size: 20px; }

  .hero__frame { inset: 14px; }
}

@media (max-width: 480px) {
  .hero__names { letter-spacing: .12em; text-indent: .12em; }
  .card__names { letter-spacing: .12em; text-indent: .12em; }
  .footer__names { letter-spacing: .28em; text-indent: .28em; font-size: 18px; }
}

/* 尊重使用者的動態偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  .reveal-char { opacity: 1; transform: none; filter: none; }
}