:root {
  --ink: #2e2423;
  --muted: #725b57;
  --wine: #4a1019;
  --wine-deep: #26060d;
  --wine-mid: #721c2b;
  --paper: #f5eee2;
  --paper-deep: #e8dac9;
  --gold: #b9894f;
  --gold-light: #e4c585;
  --line: rgba(137, 83, 61, .3);
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", SimSun, serif;
  --sans: "Avenir Next", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --script: "Snell Roundhand", "STKaiti", "Kaiti SC", "KaiTi", cursive;
}

* { box-sizing: border-box; }
html { background: var(--wine-deep); scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--wine-deep); font-family: var(--serif); -webkit-font-smoothing: antialiased; }
button, a { font: inherit; -webkit-tap-highlight-color: transparent; }
button:focus:not(:focus-visible), a:focus:not(:focus-visible) { outline: none; }
button { border: 0; cursor: pointer; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 20; padding: 10px 14px; color: var(--paper); background: var(--wine); border: 1px solid var(--gold); }
.skip-link:focus { top: 12px; }

.ambient { position: fixed; inset: 0; pointer-events: none; overflow: hidden; background: radial-gradient(ellipse at 15% 10%, rgba(142, 46, 47, .33), transparent 42%), radial-gradient(ellipse at 95% 70%, rgba(138, 41, 47, .27), transparent 48%), #26060d; }
.ambient::before, .ambient::after { position: absolute; inset: 0; content: ""; opacity: .2; background-image: url("assets/noise.svg"); mix-blend-mode: screen; }
.ambient::after { opacity: .15; background-size: 140px 140px; transform: rotate(180deg); }
.ambient i { position: absolute; display: block; border-radius: 50%; filter: blur(1px); background: rgba(230, 196, 122, .8); box-shadow: 0 0 14px rgba(238, 192, 114, .7); animation: drift 9s ease-in-out infinite; }
.ambient i:nth-child(1) { width: 3px; height: 3px; top: 18%; left: 8%; animation-delay: -2s; }
.ambient i:nth-child(2) { width: 2px; height: 2px; top: 40%; right: 12%; animation-delay: -6s; }
.ambient i:nth-child(3) { width: 3px; height: 3px; bottom: 16%; left: 72%; animation-delay: -4s; }
@keyframes drift { 50% { transform: translate(12px, -22px); opacity: .34; } }

.site-frame { position: relative; z-index: 1; max-width: 720px; min-height: 100vh; margin: 0 auto; overflow: hidden; box-shadow: 0 0 100px rgba(0,0,0,.34); }
.cover { position: relative; display: grid; min-height: min(920px, 100svh); place-items: center; overflow: hidden; color: var(--paper); background: radial-gradient(circle at 50% 45%, #8d2830 0, #5c111b 43%, #330810 100%); isolation: isolate; }
.cover::before { position: absolute; inset: 15px; z-index: -1; content: ""; border: 1px solid rgba(219, 177, 105, .53); }
.cover::after { position: absolute; inset: 28px; z-index: -1; content: ""; border: 1px solid rgba(219, 177, 105, .18); }
.cover-backdrop { position: absolute; inset: 0; z-index: -2; opacity: .3; background-image: linear-gradient(110deg, rgba(0,0,0,.18), transparent 30%, rgba(0,0,0,.24)), url("assets/noise.svg"); background-size: auto, 180px 180px; }
.cover-backdrop::after { position: absolute; inset: -30% -50%; content: ""; background: linear-gradient(112deg, transparent 44%, rgba(255,226,164,.12) 49%, rgba(255,226,164,.03) 53%, transparent 58%); animation: velvet-sweep 12s ease-in-out infinite; pointer-events: none; }
@keyframes velvet-sweep { 0%, 25% { transform: translateX(-24%); opacity: 0; } 45% { opacity: 1; } 68%, 100% { transform: translateX(24%); opacity: 0; } }
.cover-content { position: relative; width: min(86%, 570px); padding: 60px 0 64px; text-align: center; transition: transform .85s cubic-bezier(.2,.8,.3,1), opacity .85s ease; }
.cover--opened .cover-content { opacity: .64; transform: scale(.96) translateY(-10px); }
.eyebrow { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 0; color: var(--wine-mid); font: 10px/1.2 var(--sans); letter-spacing: .23em; text-transform: uppercase; }
.eyebrow b { width: 26px; height: 1px; display: block; background: currentColor; opacity: .6; }
.eyebrow--light { color: var(--gold-light); }
.cover-title-lockup { position: relative; width: max-content; margin: 44px auto 26px; padding: 0 48px; }
.cover-title-lockup::before, .cover-title-lockup::after { position: absolute; top: 50%; width: 42px; height: 1px; content: ""; background: linear-gradient(90deg, transparent, var(--gold)); }
.cover-title-lockup::before { left: 0; }
.cover-title-lockup::after { right: 0; transform: rotate(180deg); }
.cover-title-lockup h1 { display: flex; flex-direction: column; gap: 2px; margin: 0; color: var(--paper); font-weight: 400; font-size: clamp(3.2rem, 14vw, 5.5rem); line-height: .96; letter-spacing: .08em; text-shadow: 0 5px 18px rgba(0,0,0,.2); }
.cover-title-lockup h1 em { font-style: normal; }
.cover-side-note { position: absolute; top: 50%; left: 2px; color: var(--gold-light); font-size: 11px; letter-spacing: .35em; writing-mode: vertical-rl; transform: translateY(-50%); }
.cover-side-note--vertical { left: auto; right: 2px; }
.cover-date { margin: 0 0 7px; color: var(--gold-light); font: 13px/1 var(--sans); letter-spacing: .4em; }
.cover-date small { font-size: 8px; opacity: .8; }
.cover-names { margin: 0; font-size: clamp(1.1rem, 4.5vw, 1.45rem); letter-spacing: .23em; }
.cover-names span { padding: 0 .7em; color: var(--gold-light); font-family: var(--sans); font-size: .65em; }
.cover-intro { margin: 26px 0 30px; color: rgba(255, 243, 224, .82); font-size: 14px; line-height: 2; letter-spacing: .09em; }
.seal-button { position: relative; display: flex; flex-direction: column; align-items: center; width: 145px; min-height: 145px; margin: 0 auto; padding: 32px 10px 12px; color: var(--paper); background: transparent; }
.seal-button__ring { position: absolute; inset: 4px; border: 1px solid rgba(222, 185, 112, .62); border-radius: 50%; transform: rotate(-15deg); }
.seal-button__ring::before, .seal-button__ring::after { position: absolute; content: ""; border: 1px dashed rgba(222, 185, 112, .45); border-radius: 50%; }
.seal-button__ring::before { inset: 8px; }.seal-button__ring::after { inset: -5px; opacity: .5; }
.seal-button__stamp { display: grid; width: 54px; height: 54px; place-items: center; color: var(--wine); background: var(--gold-light); border-radius: 8px; box-shadow: 0 8px 22px rgba(19, 1, 3, .3), inset 0 0 0 2px rgba(108, 38, 27, .2); font-size: 34px; line-height: 1; transform: rotate(-7deg); transition: transform .35s ease; }
.seal-button__label { margin-top: 10px; font-size: 14px; letter-spacing: .18em; }
.seal-button__hint { margin-top: 5px; color: rgba(243, 221, 183, .64); font: 9px/1 var(--sans); letter-spacing: .08em; }
.seal-button:hover .seal-button__stamp, .seal-button:focus-visible .seal-button__stamp { transform: rotate(0) scale(1.06); }
.seal-button:focus-visible { outline: 2px solid var(--gold-light); outline-offset: 5px; }
.cover--opened .seal-button__stamp { animation: stamp-open .8s cubic-bezier(.2,.8,.3,1) both; }
.cover--opened .seal-button__ring { animation: ring-open .8s ease both; }
@keyframes stamp-open { 50% { transform: rotate(6deg) scale(1.16); box-shadow: 0 0 0 10px rgba(228,197,133,.12), 0 10px 28px rgba(19,1,3,.35); } 100% { transform: rotate(0) scale(.98); } }
@keyframes ring-open { to { transform: rotate(165deg) scale(1.1); opacity: .32; } }
.cover-ornament { position: absolute; z-index: -1; width: min(220px, 38vw); opacity: .58; }
.cover-ornament svg { width: 100%; height: auto; fill: none; stroke: var(--gold-light); stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.2; }
.cover-ornament--left { bottom: -16px; left: -10px; }.cover-ornament--right { top: -16px; right: -10px; transform: rotate(180deg); }
.cover-footer { position: absolute; right: 0; bottom: 28px; left: 0; margin: 0; color: rgba(240, 214, 167, .56); font: 9px var(--sans); letter-spacing: .35em; text-align: center; }
.cover-footer span { padding: 0 8px; color: var(--gold); }

.invitation { position: relative; overflow: hidden; color: var(--ink); background: var(--paper); opacity: 0; transform: translateY(30px); transition: opacity .8s ease, transform .8s ease; }
.invitation.is-open { opacity: 1; transform: translateY(0); }
.invitation::before { position: absolute; inset: 14px; content: ""; border: 1px solid var(--line); pointer-events: none; }
.paper-texture { position: absolute; inset: 0; z-index: 0; opacity: .23; background-image: url("assets/noise.svg"); background-size: 160px 160px; pointer-events: none; }
.invitation > *:not(.paper-texture) { position: relative; z-index: 1; }
.invitation-header { padding: 82px 34px 30px; text-align: center; }
.header-rule { position: relative; width: 100%; height: 22px; margin-bottom: 19px; color: var(--gold); }
.header-rule::before, .header-rule::after { position: absolute; top: 50%; width: calc(50% - 21px); height: 1px; content: ""; background: linear-gradient(90deg, transparent, var(--gold)); }
.header-rule::before { left: 0; }.header-rule::after { right: 0; transform: rotate(180deg); }
.header-rule span { display: inline-block; color: var(--gold); font-size: 13px; line-height: 22px; }
.invitation-overline { margin: 28px 0 18px; color: var(--muted); font-size: 15px; letter-spacing: .13em; }.invitation-overline strong { color: var(--wine-mid); font-weight: 500; }
.invitation-header h2 { display: flex; align-items: baseline; justify-content: center; gap: 13px; margin: 0; color: var(--wine); font-size: clamp(2rem, 8vw, 3.25rem); font-weight: 400; letter-spacing: .15em; }
.invitation-header h2 i { color: var(--gold); font-family: var(--sans); font-size: .46em; font-style: normal; letter-spacing: 0; }
.title-caption { margin: 16px 0 0; color: var(--muted); font-size: 13px; letter-spacing: .17em; }
.invitation-body { position: relative; display: grid; grid-template-columns: 38% 62%; width: min(100% - 56px, 590px); margin: 0 auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.floral-panel { position: relative; min-height: 440px; padding: 17px 0 14px 0; border-right: 1px solid var(--line); overflow: hidden; }
.floral-panel img { position: absolute; top: 48px; left: -114px; width: 430px; max-width: none; transform: rotate(-7deg); }
.vertical-word { position: absolute; top: 24px; right: 11px; color: var(--wine-mid); font-size: 17px; letter-spacing: .48em; writing-mode: vertical-rl; }
.letter { position: relative; padding: 54px 24px 36px; }
.letter-seal { position: absolute; top: 24px; right: 24px; display: grid; width: 28px; height: 28px; place-items: center; color: var(--paper); background: var(--wine-mid); border-radius: 3px; font-size: 17px; }
.letter-greeting { margin: 0 0 23px; color: var(--wine); font-size: 17px; letter-spacing: .11em; }
.letter-message { color: #4c3d3a; font-size: 15px; line-height: 2.1; letter-spacing: .07em; }.letter-message p { margin: 0 0 16px; }
.letter-closing { margin: 27px 0 20px; color: var(--wine-mid); font-size: 15px; letter-spacing: .1em; }
.letter-signature { display: flex; align-items: center; gap: 13px; margin: 0; color: var(--wine); font-size: 17px; letter-spacing: .1em; }.letter-signature b { color: var(--gold); font-size: 12px; font-weight: 400; }
.details, .story, .contacts { width: min(100% - 56px, 590px); margin: 0 auto; }
.details { padding: 58px 0 0; }.section-heading { display: flex; align-items: center; gap: 12px; color: var(--wine); }.section-heading__mark { color: var(--gold); font: 10px var(--sans); letter-spacing: .12em; }.section-heading h3 { margin: 0; font-size: 19px; font-weight: 400; letter-spacing: .18em; }.section-heading__line { flex: 1; height: 1px; background: var(--line); }
.details-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 24px 0 17px; }.detail-card { display: flex; flex-direction: column; min-height: 177px; padding: 20px 18px 17px; border: 1px solid var(--line); background: rgba(255,255,255,.19); }.detail-label { margin-bottom: 21px; color: var(--gold); font: 9px var(--sans); letter-spacing: .14em; }.detail-card strong { margin-bottom: 10px; color: var(--wine); font-size: 17px; font-weight: 500; line-height: 1.4; }.detail-card > span:not(.detail-label) { color: var(--muted); font-size: 13px; line-height: 1.8; }.detail-card--venue { position: relative; overflow: hidden; background: linear-gradient(145deg, rgba(255,255,255,.32), rgba(239,219,194,.22)); }.detail-card--venue::after { position: absolute; right: -8px; bottom: -29px; content: "宴"; color: rgba(150,75,62,.08); font: 126px/1 var(--serif); pointer-events: none; }.detail-card--venue strong { margin-bottom: 3px; font-size: 23px; letter-spacing: .16em; }.venue-tagline { margin-bottom: 6px; color: var(--gold) !important; font: 9px/1.2 var(--sans) !important; letter-spacing: .13em; }.text-button { display: inline-flex; align-items: center; gap: 5px; align-self: flex-start; margin-top: auto; padding: 5px 0 2px; color: var(--wine-mid); background: transparent; border-bottom: 1px solid currentColor; font-size: 12px; }.text-button span { color: var(--gold); font-family: var(--sans); font-size: 13px; }.text-button:focus-visible { outline: 2px solid var(--wine-mid); outline-offset: 4px; }.detail-footnote { margin: 0; color: var(--muted); font-size: 12px; letter-spacing: .05em; text-align: right; }.detail-footnote strong { color: var(--wine); font-weight: 500; }.detail-footnote a { margin-left: 6px; color: var(--wine-mid); text-decoration: none; border-bottom: 1px solid var(--line); }
.story { margin-top: 73px; padding: 0 16px; }.story-heading { text-align: center; }.story-heading .section-heading__mark { display: block; margin-bottom: 17px; }.story-heading .eyebrow { color: var(--gold); }.story-heading h3 { margin: 11px 0 27px; color: var(--wine); font-size: 24px; font-weight: 400; letter-spacing: .18em; }.story-timeline { position: relative; padding-left: 32px; }.story-timeline::before { position: absolute; top: 7px; bottom: 7px; left: 5px; width: 1px; content: ""; background: var(--line); }.story-item { position: relative; padding-bottom: 23px; }.story-item::before { position: absolute; top: 5px; left: -32px; width: 10px; height: 10px; content: ""; background: var(--paper); border: 1px solid var(--gold); border-radius: 50%; box-shadow: 0 0 0 4px var(--paper); }.story-date { color: var(--gold); font: 11px var(--sans); letter-spacing: .12em; }.story-item p { margin: 7px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; letter-spacing: .06em; }
.contacts { margin-top: 58px; }.contact-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; margin-top: 23px; }.contact-button { position: relative; display: flex; flex-direction: column; min-height: 89px; padding: 16px 40px 13px 17px; color: var(--wine); border: 1px solid var(--line); text-decoration: none; transition: background .25s ease, transform .25s ease; }.contact-button:hover { background: rgba(115, 28, 43, .06); transform: translateY(-2px); }.contact-button:focus-visible { outline: 2px solid var(--wine-mid); outline-offset: 3px; }.contact-button__label { margin-bottom: 9px; font-size: 13px; letter-spacing: .12em; }.contact-button__number { color: var(--muted); font: 11px var(--sans); letter-spacing: .08em; }.contact-button__icon { position: absolute; top: 17px; right: 17px; color: var(--gold); font: 18px var(--sans); }
.invitation-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 13px; margin-top: 76px; padding: 34px 27px 60px; color: var(--wine-mid); font-size: 13px; letter-spacing: .14em; text-align: center; }.invitation-footer b { color: var(--gold); font-size: 11px; }.invitation-footer small { flex-basis: 100%; margin-top: 14px; color: var(--muted); font: 9px var(--sans); letter-spacing: .25em; }
.toast { position: fixed; z-index: 20; right: 50%; bottom: 25px; padding: 10px 15px; color: var(--paper); background: var(--wine); border: 1px solid rgba(223,185,112,.6); border-radius: 99px; opacity: 0; pointer-events: none; transform: translate(50%, 18px); transition: opacity .25s, transform .25s; font-size: 12px; letter-spacing: .06em; }.toast.is-visible { opacity: 1; transform: translate(50%, 0); }
.reveal { opacity: 0; transform: translateY(16px); }.invitation.is-open .reveal { animation: rise .8s cubic-bezier(.2,.8,.3,1) forwards; }.invitation.is-open .reveal:nth-child(2) { animation-delay: .12s; }.invitation.is-open .reveal:nth-child(3) { animation-delay: .23s; }.invitation.is-open .reveal:nth-child(4) { animation-delay: .34s; }.invitation.is-open .reveal:nth-child(5) { animation-delay: .45s; }.invitation.is-open .reveal:nth-child(6) { animation-delay: .56s; }.invitation.is-open .reveal:nth-child(7) { animation-delay: .67s; }
@keyframes rise { to { opacity: 1; transform: translateY(0); } }

@media (min-width: 650px) {
  .site-frame { min-height: 100vh; }.cover { min-height: 900px; }.cover-content { padding-top: 80px; }.invitation-header { padding-top: 105px; }.invitation-body { grid-template-columns: 34% 66%; }.floral-panel { min-height: 465px; }.letter { padding-right: 38px; padding-left: 35px; }.letter-message { font-size: 16px; }.details, .story, .contacts { width: min(100% - 100px, 590px); }
}
@media (max-width: 600px) {
  .invitation-header { padding-right: 28px; padding-left: 28px; }
  .invitation-body, .details, .story, .contacts { width: calc(100% - 48px); }
  .invitation-body { grid-template-columns: 1fr; }
  .floral-panel { min-height: 158px; border-right: 0; border-bottom: 1px solid var(--line); background: linear-gradient(110deg, rgba(227,211,187,.22), rgba(255,255,255,.1)); }
  .floral-panel img { top: -56px; left: -74px; width: 500px; transform: rotate(5deg); }
  .vertical-word { top: 22px; left: 28px; right: auto; font-size: 18px; }
  .letter { padding: 42px 27px 34px; }
  .letter-greeting { font-size: 19px; }
  .letter-message { font-size: 16px; line-height: 2; letter-spacing: .045em; }
  .letter-closing { font-size: 16px; }
  .details-grid { grid-template-columns: 1fr; }
  .detail-card { min-height: 160px; padding: 24px; }
  .detail-label { font-size: 10px; margin-bottom: 17px; }
  .detail-card strong { font-size: 22px; }
  .detail-card > span:not(.detail-label) { font-size: 16px; }
  .text-button { min-height: 44px; margin-top: 12px; font-size: 14px; }
  .detail-footnote { text-align: left; font-size: 14px; line-height: 1.9; }
  .story { padding: 0; }
  .story-item p { font-size: 16px; }
  .contact-actions { grid-template-columns: 1fr; gap: 12px; }
  .contact-button { min-height: 88px; padding: 18px 48px 17px 22px; }
  .contact-button__label { font-size: 17px; }
  .contact-button__number { font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}