html {
    scroll-behavior: smooth;
}

body.hyakutou-page {
    --hk-black: #080605;
    --hk-black-soft: #100b09;
    --hk-surface: #17100d;
    --hk-surface-deep: #0c0908;
    --hk-paper: #f1e4c8;
    --hk-paper-muted: #c8b896;
    --hk-red: #9f2f24;
    --hk-red-dark: #5e1713;
    --hk-ember: #e78b3d;
    --hk-gold: #b89259;
    --hk-line: rgba(210, 169, 103, 0.28);
    --hk-line-soft: rgba(241, 228, 200, 0.12);
    --hk-serif: "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Noto Serif JP", serif;
    --hk-sans: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--hk-black);
    color: var(--hk-paper);
    font-family: var(--hk-sans);
}

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

.hyakutou-page h1,
.hyakutou-page h2,
.hyakutou-page h3 {
    font-family: var(--hk-serif);
    font-weight: 600;
    letter-spacing: 0.055em;
}

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

.hyakutou-page a {
    color: inherit;
}

.hyakutou-page a:focus-visible,
.hyakutou-page button:focus-visible {
    outline: 2px solid var(--hk-ember);
    outline-offset: 4px;
}

.hk-shell {
    width: min(1160px, calc(100% - 48px));
    margin: 0 auto;
}

.hk-skip-link {
    position: fixed;
    z-index: 3000;
    top: 10px;
    left: 12px;
    padding: 10px 16px;
    border: 1px solid var(--hk-gold);
    background: var(--hk-black);
    color: var(--hk-paper);
    transform: translateY(-180%);
    transition: transform 0.18s ease;
}

.hk-skip-link:focus {
    transform: translateY(0);
}

.hyakutou-page .hk-header {
    position: sticky;
    z-index: 1200;
    top: 0;
    border-bottom: 1px solid var(--hk-line-soft);
    background: rgba(8, 6, 5, 0.93);
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(14px);
}

.hyakutou-page .hk-header .header-container {
    min-height: 70px;
    padding: 10px 24px;
    gap: 24px;
}

.hyakutou-page .hk-header .logo {
    flex: 0 0 auto;
    color: var(--hk-paper);
    font-family: var(--hk-sans);
    font-size: 1.05rem;
    letter-spacing: 0.16em;
}

.hyakutou-page .hk-header .logo span,
.hyakutou-page .hk-footer .logo span {
    color: var(--hk-gold);
}

.hyakutou-page .hk-header nav {
    min-width: 0;
}

.hyakutou-page .hk-header .nav-links {
    gap: 4px;
}

.hyakutou-page .hk-header .nav-links a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    padding: 0 12px;
    color: var(--hk-paper-muted);
    font-family: var(--hk-sans);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: none;
    white-space: nowrap;
}

.hyakutou-page .hk-header .nav-links a:hover {
    color: #fff5dc;
}

.hk-hero {
    position: relative;
    display: flex;
    min-height: max(740px, calc(100svh - 70px));
    align-items: center;
    overflow: hidden;
    border-bottom: 1px solid var(--hk-line);
    background:
        radial-gradient(circle at 76% 45%, rgba(134, 31, 19, 0.28), transparent 30%),
        radial-gradient(circle at 16% 24%, rgba(132, 69, 27, 0.11), transparent 25%),
        linear-gradient(115deg, #100906 0%, #070505 48%, #030303 100%);
}

.hk-hero::before,
.hk-hero::after {
    position: absolute;
    content: "";
    pointer-events: none;
}

.hk-hero::before {
    inset: 0;
    opacity: 0.34;
    background:
        repeating-linear-gradient(91deg, transparent 0 54px, rgba(255, 226, 180, 0.025) 55px, transparent 56px),
        repeating-linear-gradient(4deg, transparent 0 73px, rgba(255, 255, 255, 0.018) 74px, transparent 75px);
}

.hk-hero::after {
    width: 620px;
    height: 620px;
    right: -220px;
    bottom: -340px;
    border: 1px solid rgba(181, 128, 72, 0.18);
    border-radius: 50%;
    box-shadow: 0 0 0 78px rgba(181, 128, 72, 0.025), 0 0 0 155px rgba(181, 128, 72, 0.018);
}

.hk-hero-noise {
    position: absolute;
    inset: -20%;
    opacity: 0.34;
    background:
        radial-gradient(ellipse at 70% 40%, rgba(199, 45, 29, 0.18), transparent 28%),
        radial-gradient(ellipse at 84% 58%, rgba(235, 134, 55, 0.08), transparent 22%);
    filter: blur(26px);
    animation: hk-smoke 12s ease-in-out infinite alternate;
    pointer-events: none;
}

.hk-hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
    gap: clamp(40px, 7vw, 96px);
    align-items: center;
    padding-top: 74px;
    padding-bottom: 78px;
}

.hk-hero-copy {
    max-width: 680px;
}

.hk-eyebrow,
.hk-section-label {
    margin-bottom: 18px;
    color: var(--hk-gold);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.32em;
    line-height: 1.5;
}

.hk-eyebrow::before,
.hk-section-label::before {
    display: inline-block;
    width: 34px;
    height: 1px;
    margin: 0 12px 0.25em 0;
    background: currentColor;
    content: "";
}

.hk-ritual-line {
    margin-bottom: 12px;
    color: var(--hk-paper-muted);
    font-family: var(--hk-serif);
    font-size: clamp(1rem, 2vw, 1.25rem);
    letter-spacing: 0.17em;
}

.hk-ritual-line span {
    color: var(--hk-ember);
}

.hk-hero h1 {
    margin-bottom: 24px;
    color: #fff5df;
    font-size: clamp(3.5rem, 8.4vw, 7.4rem);
    letter-spacing: 0.09em;
    line-height: 0.96;
    text-shadow: 0 0 46px rgba(159, 47, 36, 0.28);
}

.hk-hero h1 small {
    display: block;
    margin-top: 17px;
    color: var(--hk-paper-muted);
    font-family: var(--hk-sans);
    font-size: clamp(0.78rem, 1.45vw, 1.03rem);
    font-weight: 500;
    letter-spacing: 0.2em;
    line-height: 1.6;
}

.hk-hero-lead {
    margin-bottom: 17px;
    color: #f8ead0;
    font-family: var(--hk-serif);
    font-size: clamp(1.6rem, 3.8vw, 2.75rem);
    letter-spacing: 0.075em;
    line-height: 1.45;
}

.hk-hero-lead em {
    color: #d35643;
    font-style: normal;
}

.hk-hero-text {
    max-width: 610px;
    margin-bottom: 24px;
    color: var(--hk-paper-muted);
    font-size: 0.98rem;
    letter-spacing: 0.035em;
    line-height: 1.95;
}

.hk-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.hk-tags span {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    padding: 5px 12px;
    border: 1px solid var(--hk-line);
    color: var(--hk-paper-muted);
    font-size: 0.74rem;
    letter-spacing: 0.08em;
}

.hk-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.hk-button {
    display: inline-flex;
    min-height: 52px;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 22px;
    border: 1px solid var(--hk-red);
    color: #fff5df;
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.075em;
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.hk-button-primary {
    background: linear-gradient(135deg, var(--hk-red) 0%, var(--hk-red-dark) 100%);
    box-shadow: 0 12px 30px rgba(94, 23, 19, 0.26);
}

.hk-button-ghost {
    border-color: var(--hk-line);
    background: rgba(255, 255, 255, 0.018);
    color: var(--hk-paper-muted);
}

.hk-button:hover {
    transform: translateY(-2px);
    border-color: var(--hk-ember);
    color: #fff;
}

.hk-content-note {
    margin: 18px 0 0;
    color: rgba(200, 184, 150, 0.66);
    font-size: 0.7rem;
}

.hk-candle-stage {
    position: relative;
    justify-self: end;
    width: min(100%, 470px);
    padding: 28px 28px 22px;
    border: 1px solid var(--hk-line);
    background: rgba(6, 4, 4, 0.52);
    box-shadow: 0 28px 90px rgba(0, 0, 0, 0.52);
}

.hk-candle-stage::before,
.hk-candle-stage::after {
    position: absolute;
    width: 54px;
    height: 54px;
    border-color: var(--hk-gold);
    content: "";
    opacity: 0.7;
}

.hk-candle-stage::before {
    top: -1px;
    left: -1px;
    border-top: 2px solid;
    border-left: 2px solid;
}

.hk-candle-stage::after {
    right: -1px;
    bottom: -1px;
    border-right: 2px solid;
    border-bottom: 2px solid;
}

.hk-candle-glow {
    position: absolute;
    z-index: 0;
    width: 66%;
    aspect-ratio: 1;
    top: 3%;
    left: 17%;
    border-radius: 50%;
    background: rgba(231, 85, 36, 0.26);
    filter: blur(48px);
    animation: hk-flicker 4.2s ease-in-out infinite alternate;
}

.hk-candle-picture {
    position: relative;
    z-index: 1;
    display: block;
    overflow: hidden;
    background: #030201;
}

.hk-candle-picture img {
    width: 100%;
    height: auto;
}

.hk-candle-count {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: auto minmax(40px, 1fr) auto;
    gap: 11px;
    align-items: center;
    margin-top: 18px;
    color: var(--hk-gold);
    font-family: Georgia, serif;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
}

.hk-candle-count i {
    height: 1px;
    background: var(--hk-line);
}

.hk-candle-stage > p {
    position: relative;
    z-index: 2;
    margin: 11px 0 0;
    color: var(--hk-paper-muted);
    font-family: var(--hk-serif);
    font-size: 0.82rem;
    letter-spacing: 0.13em;
    text-align: center;
}

.hk-story,
.hk-screens,
.hk-about {
    position: relative;
    padding: clamp(82px, 10vw, 132px) 0;
}

.hk-story {
    background:
        radial-gradient(circle at 12% 34%, rgba(121, 43, 25, 0.09), transparent 26%),
        linear-gradient(180deg, #0b0807 0%, #100b09 100%);
}

.hk-intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
    gap: clamp(42px, 8vw, 102px);
    align-items: center;
    margin-bottom: clamp(64px, 8vw, 100px);
}

.hk-intro-copy h2,
.hk-section-heading h2,
.hk-language-inner h2,
.hk-download-copy h2,
.hk-about h2 {
    margin-bottom: 22px;
    color: #fff3d9;
    font-size: clamp(2rem, 5.3vw, 4.4rem);
    line-height: 1.36;
}

.hk-intro-copy h2 span,
.hk-section-heading h2 span {
    color: #c74c39;
}

.hk-intro-copy > p:last-child,
.hk-section-heading > p:last-child {
    color: var(--hk-paper-muted);
    font-size: 1rem;
    letter-spacing: 0.025em;
    line-height: 2;
}

.hk-guide-visual {
    position: relative;
    margin: 0;
    padding: 12px;
    border: 1px solid var(--hk-line);
    background: #080504;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
}

.hk-guide-visual::before {
    position: absolute;
    inset: 6px;
    border: 1px solid rgba(241, 228, 200, 0.08);
    content: "";
    pointer-events: none;
}

.hk-guide-visual img {
    width: 100%;
    height: auto;
}

.hk-guide-visual figcaption {
    padding: 13px 6px 3px;
    color: var(--hk-paper-muted);
    font-family: var(--hk-serif);
    font-size: 0.78rem;
    letter-spacing: 0.11em;
    text-align: center;
}

.hk-ritual-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin: 0 0 76px;
    padding: 1px;
    list-style: none;
    background: var(--hk-line);
}

.hk-ritual-steps li {
    position: relative;
    min-height: 320px;
    padding: 34px 30px;
    overflow: hidden;
    background: var(--hk-surface-deep);
}

.hk-ritual-steps li::after {
    position: absolute;
    right: -16px;
    bottom: -43px;
    color: rgba(184, 146, 89, 0.055);
    font-family: var(--hk-serif);
    font-size: 9rem;
    line-height: 1;
    content: attr(data-step);
}

.hk-ritual-steps li > span {
    display: grid;
    width: 48px;
    height: 48px;
    margin-bottom: 42px;
    place-items: center;
    border: 1px solid var(--hk-gold);
    color: var(--hk-ember);
    font-family: var(--hk-serif);
    font-size: 1.1rem;
}

.hk-step-en {
    margin-bottom: 7px;
    color: var(--hk-gold);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.24em;
}

.hk-ritual-steps h3 {
    margin-bottom: 13px;
    color: #f7ead0;
    font-size: 1.35rem;
}

.hk-ritual-steps li > p:last-child {
    position: relative;
    z-index: 1;
    margin-bottom: 0;
    color: var(--hk-paper-muted);
    font-size: 0.88rem;
    line-height: 1.85;
}

.hk-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.hk-feature-grid article {
    min-height: 250px;
    padding: 27px 24px;
    border-top: 1px solid var(--hk-gold);
    border-right: 1px solid var(--hk-line-soft);
    border-bottom: 1px solid var(--hk-line-soft);
    border-left: 1px solid var(--hk-line-soft);
    background: rgba(255, 255, 255, 0.018);
}

.hk-feature-grid strong {
    display: block;
    margin-bottom: 38px;
    color: #c44434;
    font-family: Georgia, serif;
    font-size: 1rem;
    letter-spacing: 0.12em;
}

.hk-feature-grid h3 {
    margin-bottom: 11px;
    color: #f7ead0;
    font-size: 1.06rem;
}

.hk-feature-grid p {
    margin-bottom: 0;
    color: var(--hk-paper-muted);
    font-size: 0.82rem;
    line-height: 1.8;
}

.hk-screens {
    overflow: hidden;
    border-top: 1px solid rgba(255, 255, 255, 0.045);
    border-bottom: 1px solid rgba(255, 255, 255, 0.045);
    background:
        radial-gradient(circle at 80% 10%, rgba(37, 79, 88, 0.08), transparent 23%),
        #070706;
}

.hk-section-heading {
    max-width: 690px;
    margin-bottom: 58px;
}

.hk-screen-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.hk-shot {
    min-width: 0;
    margin: 0;
}

.hk-shot > div {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(184, 146, 89, 0.44);
    background: #050403;
    box-shadow: 0 22px 56px rgba(0, 0, 0, 0.45);
}

.hk-shot > div::before,
.hk-shot > div::after {
    position: absolute;
    z-index: 2;
    width: 27px;
    height: 27px;
    content: "";
    pointer-events: none;
}

.hk-shot > div::before {
    top: 7px;
    left: 7px;
    border-top: 1px solid var(--hk-gold);
    border-left: 1px solid var(--hk-gold);
}

.hk-shot > div::after {
    right: 7px;
    bottom: 7px;
    border-right: 1px solid var(--hk-gold);
    border-bottom: 1px solid var(--hk-gold);
}

.hk-shot picture,
.hk-shot img {
    width: 100%;
}

.hk-shot figcaption {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 11px;
    padding: 18px 4px 0;
}

.hk-shot figcaption span {
    grid-row: 1 / span 2;
    color: var(--hk-red);
    font-family: Georgia, serif;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

.hk-shot figcaption strong {
    color: var(--hk-paper);
    font-family: var(--hk-serif);
    font-size: 0.98rem;
    letter-spacing: 0.055em;
}

.hk-shot figcaption small {
    color: var(--hk-paper-muted);
    font-size: 0.7rem;
    line-height: 1.55;
}

.hk-languages {
    padding: clamp(64px, 8vw, 92px) 0;
    border-bottom: 1px solid var(--hk-line);
    background:
        linear-gradient(90deg, rgba(96, 22, 18, 0.17), transparent 46%),
        var(--hk-surface-deep);
}

.hk-language-inner {
    display: grid;
    grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
    gap: 70px;
    align-items: center;
}

.hk-language-inner h2 {
    margin-bottom: 0;
    font-size: clamp(1.8rem, 4.5vw, 3.5rem);
}

.hk-language-inner ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    margin: 0;
    padding: 1px;
    list-style: none;
    background: var(--hk-line);
}

.hk-language-inner li {
    display: flex;
    min-height: 92px;
    flex-direction: column;
    justify-content: center;
    padding: 18px 23px;
    background: var(--hk-black-soft);
}

.hk-language-inner li span {
    color: var(--hk-paper);
    font-family: var(--hk-serif);
    font-size: 1.1rem;
}

.hk-language-inner li small {
    margin-top: 5px;
    color: var(--hk-gold);
    font-size: 0.65rem;
    letter-spacing: 0.13em;
}

.hk-download {
    position: relative;
    padding: clamp(78px, 9vw, 112px) 0;
    overflow: hidden;
    background:
        radial-gradient(circle at 22% 48%, rgba(179, 54, 32, 0.18), transparent 22%),
        linear-gradient(120deg, #140b08 0%, #080605 58%, #030303 100%);
}

.hk-download::before {
    position: absolute;
    width: 490px;
    height: 490px;
    top: -260px;
    right: -190px;
    border: 1px solid rgba(184, 146, 89, 0.12);
    border-radius: 50%;
    box-shadow: 0 0 0 82px rgba(184, 146, 89, 0.018), 0 0 0 166px rgba(184, 146, 89, 0.012);
    content: "";
}

.hk-download-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(34px, 6vw, 72px);
    align-items: center;
}

.hk-download-icon {
    position: relative;
    padding: 10px;
    border: 1px solid var(--hk-line);
    background: #050302;
    box-shadow: 0 24px 62px rgba(0, 0, 0, 0.43);
}

.hk-download-icon::after {
    position: absolute;
    inset: 20%;
    z-index: -1;
    border-radius: 50%;
    background: rgba(207, 56, 31, 0.48);
    filter: blur(40px);
    content: "";
}

.hk-download-icon img {
    width: 100%;
    height: auto;
}

.hk-download-copy h2 {
    margin-bottom: 14px;
    font-size: clamp(2.1rem, 5vw, 4rem);
}

.hk-download-copy > p:not(.hk-section-label):not(.hk-store-note) {
    margin-bottom: 24px;
    color: var(--hk-paper-muted);
    line-height: 1.8;
}

.hk-store-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.hk-store-buttons a {
    display: grid;
    min-width: 190px;
    min-height: 76px;
    grid-template-columns: 1fr auto;
    align-content: center;
    padding: 12px 17px;
    border: 1px solid rgba(241, 228, 200, 0.3);
    background: #050505;
    color: #fff;
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.hk-store-buttons a:hover {
    transform: translateY(-2px);
    border-color: var(--hk-ember);
    background: #100b09;
    color: #fff;
}

.hk-store-buttons small {
    grid-column: 1;
    font-size: 0.58rem;
    letter-spacing: 0.07em;
}

.hk-store-buttons strong {
    grid-column: 1;
    font-family: Arial, sans-serif;
    font-size: 1.25rem;
    line-height: 1.25;
}

.hk-store-buttons span {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
    color: var(--hk-paper-muted);
    font-size: 0.65rem;
}

.hk-store-note {
    max-width: 720px;
    margin: 16px 0 0;
    color: rgba(200, 184, 150, 0.7);
    font-size: 0.72rem;
    line-height: 1.7;
}

.hk-about {
    background: #0b0807;
}

.hk-section-heading-center {
    margin-right: auto;
    margin-left: auto;
    text-align: center;
}

.hk-about h2 {
    font-size: clamp(2rem, 4vw, 3.1rem);
}

.hk-product-info {
    display: grid;
    max-width: 900px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0 auto 24px;
    border-top: 1px solid var(--hk-line);
}

.hk-product-info div {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 18px;
    min-height: 74px;
    align-items: center;
    padding: 16px 18px;
    border-right: 1px solid var(--hk-line-soft);
    border-bottom: 1px solid var(--hk-line-soft);
}

.hk-product-info div:nth-child(2n + 1) {
    border-left: 1px solid var(--hk-line-soft);
}

.hk-product-info dt {
    color: var(--hk-gold);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

.hk-product-info dd {
    margin: 0;
    color: var(--hk-paper);
    font-size: 0.84rem;
    line-height: 1.65;
}

.hk-disclaimer {
    max-width: 900px;
    margin: 0 auto 30px;
    color: rgba(200, 184, 150, 0.68);
    font-size: 0.7rem;
    line-height: 1.7;
    text-align: center;
}

.hk-back-link {
    display: flex;
    width: fit-content;
    min-height: 44px;
    align-items: center;
    gap: 10px;
    margin: 0 auto;
    color: var(--hk-paper-muted);
    font-size: 0.78rem;
    letter-spacing: 0.07em;
}

.hk-back-link:hover {
    color: var(--hk-ember);
}

.hyakutou-page .hk-footer {
    padding: 44px 0 36px;
    border-top: 1px solid var(--hk-line);
    background: #050403;
    color: var(--hk-paper-muted);
    text-align: center;
}

.hyakutou-page .hk-footer .logo {
    display: inline-block;
    margin-bottom: 19px;
    color: var(--hk-paper);
    font-family: var(--hk-sans);
    font-size: 1rem;
    letter-spacing: 0.14em;
}

.hyakutou-page .hk-footer .footer-legal-links {
    display: flex;
    justify-content: center;
    gap: 11px 22px;
    flex-wrap: wrap;
    margin: 0 0 20px;
    font-size: 0.75rem;
}

.hyakutou-page .hk-footer .footer-legal-links a {
    color: var(--hk-paper-muted);
    text-decoration: underline;
    text-decoration-color: rgba(200, 184, 150, 0.32);
    text-underline-offset: 4px;
}

.hyakutou-page .hk-footer .footer-legal-links a:hover {
    color: var(--hk-paper);
}

.hyakutou-page .hk-footer .copyright {
    margin-bottom: 0;
    color: rgba(200, 184, 150, 0.55);
    font-size: 0.7rem;
}

@keyframes hk-flicker {
    0% {
        opacity: 0.72;
        transform: scale(0.96) translateY(3px);
    }

    35% {
        opacity: 0.9;
        transform: scale(1.02) translateY(-2px);
    }

    100% {
        opacity: 0.74;
        transform: scale(0.98) translateY(1px);
    }
}

@keyframes hk-smoke {
    from {
        transform: translate3d(-2%, 0, 0) scale(0.98);
    }

    to {
        transform: translate3d(2%, -1.5%, 0) scale(1.03);
    }
}

@media (max-width: 980px) {
    .hk-hero-grid {
        grid-template-columns: minmax(0, 1fr) minmax(300px, 0.78fr);
        gap: 42px;
    }

    .hk-hero h1 {
        font-size: clamp(3.3rem, 9vw, 5.4rem);
    }

    .hk-intro-grid {
        gap: 48px;
    }

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

    .hk-screen-grid {
        grid-template-columns: repeat(2, minmax(0, 288px));
        justify-content: center;
        gap: 54px 30px;
    }
}

@media (max-width: 760px) {
    .hk-shell {
        width: min(100% - 36px, 680px);
    }

    .hyakutou-page .hk-header .header-container {
        min-height: 62px;
        flex-direction: row;
        padding: 8px 16px;
    }

    .hyakutou-page .hk-header .logo {
        font-size: 0.82rem;
        letter-spacing: 0.09em;
    }

    .hyakutou-page .hk-header nav {
        overflow-x: auto;
        overscroll-behavior-inline: contain;
        scrollbar-width: none;
    }

    .hyakutou-page .hk-header nav::-webkit-scrollbar {
        display: none;
    }

    .hyakutou-page .hk-header .nav-links {
        width: max-content;
        flex-wrap: nowrap;
        justify-content: flex-start;
        gap: 0;
    }

    .hyakutou-page .hk-header .nav-links a {
        padding: 0 9px;
        font-size: 0.69rem;
    }

    .hk-hero {
        min-height: auto;
    }

    .hk-hero-grid {
        grid-template-columns: 1fr;
        gap: 54px;
        padding-top: 72px;
        padding-bottom: 64px;
    }

    .hk-candle-stage {
        justify-self: center;
        width: min(100%, 410px);
    }

    .hk-intro-grid,
    .hk-language-inner {
        grid-template-columns: 1fr;
        gap: 42px;
    }

    .hk-guide-visual {
        width: min(100%, 520px);
        margin: 0 auto;
    }

    .hk-ritual-steps {
        grid-template-columns: 1fr;
    }

    .hk-ritual-steps li {
        min-height: 0;
    }

    .hk-ritual-steps li > span {
        margin-bottom: 30px;
    }

    .hk-download-inner {
        grid-template-columns: 140px minmax(0, 1fr);
        gap: 32px;
    }

    .hk-product-info {
        grid-template-columns: 1fr;
    }

    .hk-product-info div:nth-child(n) {
        border-right: 1px solid var(--hk-line-soft);
        border-left: 1px solid var(--hk-line-soft);
    }
}

@media (max-width: 620px) {
    .hyakutou-page .hk-header .header-container {
        gap: 8px;
    }

    .hyakutou-page .hk-header .logo span {
        display: none;
    }

    .hk-hero h1 {
        font-size: clamp(3.1rem, 19vw, 5.5rem);
    }

    .hk-hero h1 small {
        letter-spacing: 0.12em;
    }

    .hk-actions {
        display: grid;
        grid-template-columns: 1fr;
    }

    .hk-button {
        width: 100%;
    }

    .hk-feature-grid,
    .hk-language-inner ul {
        grid-template-columns: 1fr;
    }

    .hk-feature-grid article {
        min-height: 0;
    }

    .hk-feature-grid strong {
        margin-bottom: 25px;
    }

    .hk-screen-grid {
        display: flex;
        justify-content: flex-start;
        gap: 18px;
        margin-right: -18px;
        margin-left: -18px;
        padding: 0 18px 20px;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        scrollbar-color: var(--hk-red) transparent;
    }

    .hk-shot {
        width: min(78vw, 288px);
        min-width: min(78vw, 288px);
        scroll-snap-align: center;
    }

    .hk-download-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hk-download-icon {
        width: 126px;
        margin: 0 auto;
    }

    .hk-store-buttons {
        display: grid;
        grid-template-columns: 1fr;
    }

    .hk-store-buttons a {
        width: 100%;
    }

    .hk-store-note {
        text-align: left;
    }

    .hk-product-info div {
        grid-template-columns: 90px minmax(0, 1fr);
        gap: 12px;
        padding: 14px;
    }
}

@media (max-width: 430px) {
    .hk-shell {
        width: calc(100% - 28px);
    }

    .hyakutou-page .hk-header .header-container {
        padding-right: 10px;
        padding-left: 12px;
    }

    .hyakutou-page .hk-header .logo {
        font-size: 0.73rem;
    }

    .hyakutou-page .hk-header .nav-links a {
        padding: 0 8px;
        font-size: 0.65rem;
    }

    .hk-hero-grid {
        padding-top: 58px;
    }

    .hk-candle-stage {
        padding: 18px 18px 17px;
    }

    .hk-story,
    .hk-screens,
    .hk-about {
        padding: 72px 0;
    }

    .hk-intro-copy h2,
    .hk-section-heading h2,
    .hk-language-inner h2,
    .hk-download-copy h2 {
        font-size: 2rem;
    }

    .hk-ritual-steps li {
        padding: 28px 24px;
    }

    .hk-product-info div {
        grid-template-columns: 1fr;
        gap: 5px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .hk-hero-noise,
    .hk-candle-glow {
        animation: none;
    }

    .hk-button,
    .hk-store-buttons a,
    .hk-skip-link {
        transition: none;
    }
}