:root {
    --bg-deep: #0d1116;
    --bg-mid: #121821;
    --bg-soft: #1b2330;
    --paper: #f3ede2;
    --text-light: #f9f7f2;
    --text-muted: rgba(249, 247, 242, 0.72);
    --gold: #c7a56a;
    --gold-soft: #e3c68f;
    --line: rgba(255, 255, 255, 0.14);
    --shadow-deep: 0 22px 66px rgba(0, 0, 0, 0.44);
    --ease-out: cubic-bezier(0.19, 0.78, 0.26, 1);
    --ease-smooth: cubic-bezier(0.3, 0.12, 0.2, 1);

    --font-cn: "Noto Serif SC", "Songti SC", "STSong", serif;
    --font-en: "Cinzel", "Cormorant Garamond", "Times New Roman", serif;
    --font-ui: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

    --safe-top: max(12px, env(safe-area-inset-top));
    --safe-right: max(12px, env(safe-area-inset-right));
    --safe-left: max(12px, env(safe-area-inset-left));
}

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-ui);
    color: var(--text-light);
    background:
        radial-gradient(circle at 12% 14%, rgba(199, 165, 106, 0.22), transparent 30%),
        radial-gradient(circle at 86% 6%, rgba(227, 198, 143, 0.16), transparent 32%),
        linear-gradient(160deg, var(--bg-deep), var(--bg-mid) 48%, var(--bg-soft));
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    opacity: 0.16;
    background-image:
        linear-gradient(transparent 97%, rgba(255, 255, 255, 0.08) 100%),
        linear-gradient(90deg, transparent 97%, rgba(255, 255, 255, 0.08) 100%);
    background-size: 3px 3px, 3px 3px;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.09;
    background-image:
        radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.32) 0 1px, transparent 1.2px),
        radial-gradient(circle at 67% 43%, rgba(255, 255, 255, 0.24) 0 1px, transparent 1.3px),
        radial-gradient(circle at 38% 72%, rgba(255, 255, 255, 0.2) 0 1px, transparent 1.2px);
    background-size: 180px 180px, 220px 220px, 240px 240px;
    animation: grainShift 7s steps(8, end) infinite;
}

@keyframes grainShift {
    0% { transform: translate(0, 0); }
    25% { transform: translate(-1%, 1%); }
    50% { transform: translate(1%, -1%); }
    75% { transform: translate(1%, 1%); }
    100% { transform: translate(0, 0); }
}

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

button,
a {
    color: inherit;
    font: inherit;
}

button {
    border: 0;
    background: none;
}

#bgMusic {
    display: none;
}

main {
    overflow: hidden;
}

.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    z-index: 10050;
    background: linear-gradient(90deg, #a77f4c, #eccd95, #b08552);
}

.loader {
    position: fixed;
    inset: 0;
    z-index: 11000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, #1b2028 0%, #0f1318 74%);
    transition: opacity 0.8s var(--ease-out), visibility 0.8s var(--ease-out);
}

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

.loader-inner {
    text-align: center;
}

.loader-title {
    font-family: var(--font-en);
    letter-spacing: 0.24em;
    font-size: 13px;
    color: rgba(248, 247, 244, 0.88);
}

.loader-line {
    width: 84px;
    height: 1px;
    margin: 14px auto;
    background: linear-gradient(90deg, transparent, var(--gold-soft), transparent);
    transform-origin: center;
    animation: loaderPulse 1.7s ease-in-out infinite;
}

.loader-date {
    font-family: var(--font-en);
    letter-spacing: 0.32em;
    font-size: 10px;
    color: rgba(227, 198, 143, 0.88);
}

@keyframes loaderPulse {
    0% { transform: scaleX(0.45); opacity: 0.35; }
    50% { transform: scaleX(1); opacity: 1; }
    100% { transform: scaleX(0.45); opacity: 0.35; }
}

.quick-nav {
    position: fixed;
    top: var(--safe-top);
    left: var(--safe-left);
    z-index: 10040;
    padding: 5px;
    border-radius: 999px;
    display: inline-flex;
    gap: 4px;
    background: rgba(13, 16, 20, 0.66);
    border: 1px solid rgba(227, 198, 143, 0.22);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.quick-nav a {
    text-decoration: none;
    border-radius: 999px;
    border: 1px solid transparent;
    color: rgba(249, 247, 242, 0.78);
    font-size: 10px;
    letter-spacing: 0.12em;
    padding: 8px 12px;
    transition: all 0.25s var(--ease-out);
}

.quick-nav a:active,
.quick-nav a:hover {
    color: #1b1611;
    border-color: rgba(226, 197, 145, 0.6);
    background: linear-gradient(110deg, #d7b982, #f0d6ab 55%, #cda36c);
}

.music-toggle {
    position: fixed;
    top: calc(var(--safe-top) + 54px);
    right: var(--safe-right);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    z-index: 10040;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-soft);
    background: rgba(15, 18, 22, 0.64);
    border: 1px solid rgba(227, 198, 143, 0.28);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: transform 0.28s var(--ease-smooth), box-shadow 0.28s var(--ease-smooth);
}

.music-toggle:active {
    transform: scale(0.93);
}

.music-toggle.is-playing {
    box-shadow: 0 0 0 4px rgba(227, 198, 143, 0.13);
}

.music-icon {
    width: 18px;
    height: 18px;
}

.music-on {
    display: none;
}

.hero {
    position: relative;
    min-height: 100svh;
    display: grid;
    place-items: end center;
    padding: 0 24px 72px;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 118%;
    object-position: center 28%;
    transform: scale(1.08);
    filter: saturate(1.03) contrast(1.05);
    will-change: transform;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to bottom, rgba(5, 8, 12, 0.12), rgba(8, 10, 12, 0.34) 44%, rgba(9, 11, 14, 0.86)),
        radial-gradient(circle at center 18%, rgba(225, 195, 137, 0.24), transparent 54%);
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 560px;
    z-index: 2;
}

.hero-kicker {
    font-family: var(--font-en);
    text-transform: uppercase;
    font-size: 10px;
    letter-spacing: 0.4em;
    margin-bottom: 18px;
    color: rgba(244, 238, 229, 0.64);
}

.hero-title {
    font-family: var(--font-cn);
    font-size: clamp(32px, 9vw, 62px);
    line-height: 1.12;
    letter-spacing: 0.2em;
    white-space: nowrap;
}

.name-part {
    display: inline-block;
}

.name-amp {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 0.8em;
    letter-spacing: 0.06em;
    color: var(--gold-soft);
    margin: 0 8px;
}

.hero-sub {
    margin-top: 20px;
    font-family: var(--font-cn);
    font-size: 15px;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.hero-date {
    margin-top: 10px;
    font-family: var(--font-en);
    font-size: 12px;
    letter-spacing: 0.24em;
    color: var(--gold-soft);
}

.hero-cue {
    position: absolute;
    bottom: 18px;
    z-index: 2;
    font-size: 10px;
    letter-spacing: 0.16em;
    color: rgba(248, 247, 244, 0.45);
    animation: cueFloat 1.9s ease-in-out infinite;
}

@keyframes cueFloat {
    0%, 100% { transform: translateY(0); opacity: 0.82; }
    50% { transform: translateY(6px); opacity: 0.34; }
}

.chapter {
    padding: clamp(74px, 12vw, 112px) 22px;
    text-align: center;
}

.chapter-en {
    font-family: var(--font-en);
    text-transform: uppercase;
    font-size: 10px;
    letter-spacing: 0.42em;
    color: var(--gold-soft);
    margin-bottom: 18px;
}

.chapter-title {
    font-family: var(--font-cn);
    font-size: clamp(24px, 6.4vw, 36px);
    letter-spacing: 0.16em;
    color: var(--text-light);
}

.chapter-text {
    width: min(640px, 100%);
    margin: 28px auto 0;
}

.chapter-text p,
.stack-text {
    font-family: var(--font-cn);
    font-size: clamp(14px, 3.9vw, 17px);
    letter-spacing: 0.07em;
    color: var(--text-muted);
    margin-top: 10px;
}

.stack-scene {
    position: relative;
    height: 270vh;
}

.stack-sticky {
    position: sticky;
    top: 8vh;
    height: 84vh;
    width: min(1100px, 92vw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
    gap: clamp(22px, 3vw, 40px);
}

.stack-copy {
    text-align: left;
}

.stack-copy .chapter-title {
    margin-bottom: 12px;
}

.stack-cards {
    position: relative;
    width: min(88vw, 430px);
    height: min(76vh, 540px);
    margin: 0 auto;
}

.stack-card {
    position: absolute;
    inset: 0;
    border-radius: 20px;
    overflow: hidden;
    background: #0d0f12;
    box-shadow: var(--shadow-deep);
    border: 1px solid rgba(255, 255, 255, 0.1);
    will-change: transform;
}

.stack-card img {
    transform: scale(1.08);
}

.stack-card figcaption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 66px 18px 20px;
    text-align: center;
    font-family: var(--font-cn);
    font-size: 13px;
    letter-spacing: 0.1em;
    color: rgba(248, 247, 244, 0.92);
    background: linear-gradient(to top, rgba(7, 9, 11, 0.82), transparent);
}

.chapter-certificate {
    position: relative;
}

.certificate-single {
    width: min(460px, 88vw);
    margin: 34px auto 0;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 4 / 5;
    box-shadow: var(--shadow-deep);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.certificate-single img {
    object-position: center 14%;
    transform: scale(1.18);
}

.certificate-single::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 38%;
    background: linear-gradient(to top, rgba(10, 13, 18, 0.98), rgba(10, 13, 18, 0.12));
}

.chapter-guide {
    position: relative;
    overflow: hidden;
}

.chapter-guide::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to bottom, rgba(9, 11, 15, 0.58), rgba(9, 11, 15, 0.86)),
        url("../images/studio-couple-warm.jpg") center 28% / cover no-repeat;
    transform: scale(1.08);
    filter: saturate(1.08);
}

.chapter-guide::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 24% 24%, rgba(227, 198, 143, 0.18), transparent 46%),
        radial-gradient(circle at 80% 82%, rgba(227, 198, 143, 0.14), transparent 45%);
    pointer-events: none;
}

.chapter-guide > * {
    position: relative;
    z-index: 1;
}

.guide-lead {
    margin: 12px auto 0;
    width: min(620px, 100%);
    font-size: clamp(14px, 3.8vw, 16px);
    letter-spacing: 0.08em;
    color: rgba(249, 247, 242, 0.82);
}

.guide-grid {
    margin: 30px auto 0;
    width: min(980px, 100%);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.guide-card {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    padding: 20px 16px 18px;
    text-align: left;
    background: rgba(10, 13, 18, 0.64);
    border: 1px solid rgba(227, 198, 143, 0.24);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    will-change: transform;
}

.guide-card::before {
    content: "";
    position: absolute;
    inset: -120% auto auto -60%;
    width: 56%;
    height: 240%;
    background: linear-gradient(90deg, transparent, rgba(244, 228, 197, 0.26), transparent);
    transform: rotate(18deg);
    animation: guideSweep 7.2s linear infinite;
    pointer-events: none;
}

@keyframes guideSweep {
    from { transform: translateX(-48%) rotate(18deg); }
    to { transform: translateX(278%) rotate(18deg); }
}

.guide-label {
    display: block;
    font-family: var(--font-en);
    font-size: 10px;
    letter-spacing: 0.24em;
    color: var(--gold-soft);
    text-transform: uppercase;
}

.guide-card h3 {
    margin-top: 8px;
    font-family: var(--font-cn);
    font-size: 20px;
    letter-spacing: 0.12em;
}

.guide-card p {
    margin-top: 8px;
    font-size: 13px;
    letter-spacing: 0.06em;
    color: rgba(249, 247, 242, 0.78);
}

.portrait-duo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    padding: 4px 0;
}

.portrait-card {
    aspect-ratio: 3 / 4.2;
    position: relative;
    overflow: hidden;
}

.portrait-card img {
    transform: scale(1.04);
}

.portrait-meta {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 56px 14px 18px;
    text-align: center;
    background: linear-gradient(to top, rgba(6, 8, 10, 0.86), transparent);
}

.portrait-meta p {
    font-family: var(--font-en);
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.26em;
    color: var(--gold-soft);
}

.portrait-meta h3 {
    font-family: var(--font-cn);
    margin-top: 6px;
    font-size: 18px;
    letter-spacing: 0.2em;
    color: #f7f6f2;
}

.chapter-event {
    background:
        radial-gradient(circle at center top, rgba(227, 198, 143, 0.14), transparent 56%),
        #11151a;
}

.event-card {
    width: min(500px, 100%);
    margin: 28px auto 0;
    padding: 34px 18px 30px;
    border-radius: 22px;
    background: rgba(245, 239, 230, 0.04);
    border: 1px solid rgba(227, 198, 143, 0.28);
    box-shadow: 0 26px 60px rgba(2, 3, 4, 0.4);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    position: relative;
    overflow: hidden;
}

.event-card::before {
    content: "";
    position: absolute;
    inset: -70%;
    background: conic-gradient(
        from 0deg,
        transparent 0deg,
        rgba(240, 214, 167, 0.22) 52deg,
        transparent 110deg,
        transparent 360deg
    );
    animation: haloSpin 9s linear infinite;
    pointer-events: none;
}

.event-card > * {
    position: relative;
    z-index: 1;
}

@keyframes haloSpin {
    to { transform: rotate(360deg); }
}

.event-date {
    font-family: var(--font-en);
    font-size: clamp(38px, 10vw, 56px);
    letter-spacing: 0.1em;
    line-height: 1.04;
    background: linear-gradient(110deg, #dcb87d, #f2d9ac 50%, #c89f64);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.event-detail {
    margin-top: 10px;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: rgba(245, 239, 230, 0.68);
}

.countdown {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.countdown div {
    min-width: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown span {
    font-family: var(--font-en);
    font-size: clamp(28px, 7vw, 38px);
    line-height: 1;
    color: #f8e0b4;
}

.countdown label {
    margin-top: 4px;
    font-size: 9px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(245, 239, 230, 0.42);
}

.countdown i {
    font-style: normal;
    color: rgba(245, 239, 230, 0.4);
    font-size: 16px;
    transform: translateY(-8px);
}

.venue-box {
    margin-top: 24px;
    padding-top: 22px;
    border-top: 1px solid rgba(227, 198, 143, 0.2);
}

.venue-title {
    font-family: var(--font-cn);
    font-size: 16px;
    letter-spacing: 0.1em;
    color: #f5e8d2;
}

.venue-address,
.venue-coord {
    margin-top: 8px;
    color: rgba(245, 239, 230, 0.58);
    font-size: 12px;
    letter-spacing: 0.04em;
}

.map-container {
    margin-top: 14px;
    width: 100%;
    height: 190px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid rgba(227, 198, 143, 0.2);
    background: rgba(0, 0, 0, 0.2);
}

.map-fallback {
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 16px;
    font-size: 12px;
    letter-spacing: 0.06em;
    color: rgba(245, 239, 230, 0.66);
}

.btn-nav {
    margin-top: 14px;
    width: 100%;
    max-width: 260px;
    border-radius: 999px;
    border: 1px solid rgba(227, 198, 143, 0.75);
    color: #f2d8aa;
    padding: 12px 18px;
    letter-spacing: 0.14em;
    font-size: 13px;
    cursor: pointer;
    transition: transform 0.24s var(--ease-out), background-color 0.24s var(--ease-out), color 0.24s var(--ease-out);
}

.btn-nav:active {
    transform: scale(0.96);
}

.btn-nav:hover {
    background: rgba(227, 198, 143, 0.92);
    color: #2f220e;
}

.chapter-blessing {
    padding-bottom: 88px;
}

.blessing-line {
    width: 56px;
    height: 1px;
    margin: 0 auto;
    background: linear-gradient(90deg, transparent, var(--gold-soft), transparent);
}

.blessing-sign {
    margin: 24px 0;
    font-family: var(--font-cn);
    font-size: clamp(22px, 6vw, 30px);
    letter-spacing: 0.2em;
    color: var(--gold-soft);
}

.footer {
    text-align: center;
    padding: 20px 16px calc(20px + env(safe-area-inset-bottom));
    background: rgba(7, 8, 10, 0.72);
}

.footer p {
    font-size: 11px;
    color: rgba(241, 226, 197, 0.58);
    letter-spacing: 0.14em;
}

body.has-reveal [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.68s var(--ease-out), transform 0.68s var(--ease-out);
    will-change: transform, opacity;
}

body.has-reveal [data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 980px) {
    .stack-sticky {
        grid-template-columns: 1fr;
        gap: 20px;
        top: 6vh;
        height: 88vh;
        align-content: center;
    }

    .stack-copy {
        text-align: center;
    }

    .stack-cards {
        width: min(86vw, 390px);
        height: min(64vh, 430px);
    }

    .guide-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 680px) {
    .quick-nav a {
        padding: 7px 10px;
        font-size: 9px;
    }

    .music-toggle {
        top: calc(var(--safe-top) + 50px);
    }

    .hero {
        padding: 0 16px 66px;
    }

    .hero-title {
        letter-spacing: 0.12em;
    }

    .stack-scene {
        height: 248vh;
    }

    .stack-sticky {
        height: 84vh;
    }

    .guide-card h3 {
        font-size: 18px;
    }

    .event-card {
        padding: 30px 14px 24px;
    }

    .map-container {
        height: 170px;
    }
}

@media (max-width: 420px) {
    .countdown span {
        font-size: 26px;
    }

    .countdown div {
        min-width: 38px;
    }

    .guide-card {
        padding: 18px 14px 16px;
    }

    .portrait-meta h3 {
        font-size: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}