/* ==========================================================================
   mk-07 精品会员俱乐部 · site.css
   米白打底 / 近黑正文 / 香槟金只用于细线、编号与小标题 / 全站无表格无阴影
   ========================================================================== */

:root {
    --club-paper: #fdfbf7;
    --club-card: #fffdf9;
    --club-ink: #17140f;
    --club-soft: #544c41;
    --club-mute: #8b8175;
    --club-gold: #c2a878;
    --club-line: #e7e0d3;
    --club-shell: 1140px;
    --club-band: 104px;
}

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

.club-body {
    margin: 0;
    background-color: var(--club-paper);
    color: var(--club-ink);
    font-family: Optima, "Palatino Linotype", Palatino, "Songti SC", "Noto Serif SC", serif;
    font-size: 15px;
    line-height: 2;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

.club-body img {
    display: block;
    max-width: 100%;
}

.club-shell {
    width: 100%;
    max-width: var(--club-shell);
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
}

/* ---------- 两层窄栏 header ---------- */

.club-head {
    position: sticky;
    top: 0;
    z-index: 60;
    background-color: rgba(253, 251, 247, 0.93);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.club-head.is-scrolled {
    background-color: var(--club-paper);
    border-bottom-color: var(--club-line);
}

.top-slim {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 18px;
    height: 32px;
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--club-mute);
    border-bottom: 1px solid rgba(231, 224, 211, 0.65);
}

.top-slim a {
    color: var(--club-mute);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.top-slim a:hover {
    color: var(--club-ink);
    border-bottom-color: var(--club-gold);
}

.top-brand {
    flex: 1 1 auto;
    margin: 0;
    text-align: center;
}

.main-slim {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 64px;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 1px;
    text-decoration: none;
    color: var(--club-ink);
}

.brand-word {
    font-size: 21px;
    line-height: 1.1;
    letter-spacing: 0.44em;
}

.brand-sub {
    font-size: 11px;
    letter-spacing: 0.24em;
    color: var(--club-gold);
}

.club-nav ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 26px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.club-nav a {
    position: relative;
    display: inline-block;
    padding-bottom: 4px;
    color: var(--club-ink);
    font-size: 13px;
    letter-spacing: 0.18em;
    text-decoration: none;
}

.club-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background-color: var(--club-gold);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.35s ease;
}

.club-nav a:hover::after,
.club-nav a.is-current::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    background-color: transparent;
    border: 1px solid var(--club-line);
    cursor: pointer;
}

.nav-toggle-bar {
    display: block;
    width: 16px;
    height: 1px;
    background-color: var(--club-ink);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 通用版心与栏目题 ---------- */

.club-band {
    padding-top: var(--club-band);
    padding-bottom: var(--club-band);
}

.band-kicker {
    margin: 0 0 10px;
    font-size: 12px;
    letter-spacing: 0.32em;
    color: var(--club-gold);
}

.band-title {
    margin: 0 0 38px;
    max-width: 32ch;
    font-size: 30px;
    font-weight: 400;
    line-height: 1.55;
    letter-spacing: 0.02em;
}

.band-title-sm {
    font-size: 22px;
    margin-top: 56px;
    margin-bottom: 18px;
}

.band-text {
    max-width: 66ch;
    margin: 0 0 20px;
    color: var(--club-soft);
}

.band-cta {
    margin: 34px 0 0;
}

.link-thin {
    display: inline-block;
    padding-bottom: 3px;
    font-size: 13px;
    letter-spacing: 0.14em;
    color: var(--club-ink);
    text-decoration: none;
    border-bottom: 1px solid var(--club-gold);
    transition: color 0.3s ease;
}

.link-thin:hover {
    color: var(--club-gold);
}

/* ---------- 首页 Hero：叠压构图 + 权益卡 ---------- */

.club-hero {
    padding-top: 62px;
    padding-bottom: 28px;
}

.hero-kicker {
    margin: 0 0 14px;
    font-size: 12px;
    letter-spacing: 0.3em;
    color: var(--club-gold);
}

.club-hero h1 {
    margin: 0 0 18px;
    max-width: 24ch;
    font-size: 38px;
    font-weight: 400;
    line-height: 1.4;
    letter-spacing: 0.01em;
}

.hero-lead {
    margin: 0 0 44px;
    max-width: 62ch;
    color: var(--club-soft);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: center;
    gap: 0;
}

.club-figure {
    position: relative;
    z-index: 1;
    margin: 0 0 58px;
}

.hero-base {
    width: 100%;
    aspect-ratio: 21 / 9;
    max-height: 430px;
    object-fit: cover;
    object-position: 50% 45%;
}

.hero-overlay {
    position: absolute;
    right: 6%;
    bottom: -52px;
    width: 168px;
    aspect-ratio: 3 / 4;
    max-height: 224px;
    object-fit: cover;
    object-position: 50% 18%;
    border: 10px solid var(--club-paper);
}

.club-figure figcaption {
    margin-top: 18px;
    max-width: 60ch;
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--club-mute);
}

.club-card {
    position: relative;
    z-index: 2;
    margin-left: -72px;
    padding: 34px 30px 30px;
    background-color: var(--club-card);
    border: 1px solid var(--club-gold);
}

.club-card h2 {
    margin: 0 0 8px;
    font-size: 20px;
    font-weight: 400;
    letter-spacing: 0.06em;
}

.card-note {
    margin: 0 0 20px;
    font-size: 13px;
    line-height: 1.85;
    color: var(--club-mute);
}

.club-card ul {
    margin: 0 0 24px;
    padding: 0;
    list-style: none;
}

.club-card li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 13.5px;
    line-height: 1.8;
    color: var(--club-soft);
}

.club-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 13px;
    width: 10px;
    height: 1px;
    background-color: var(--club-gold);
}

/* ---------- 首页 1：精选入口（四张 3:4 竖图卡） ---------- */

.pick-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
}

.pick-card {
    display: block;
    padding: 10px 10px 18px;
    border: 1px solid var(--club-line);
    color: var(--club-ink);
    text-decoration: none;
    transition: border-color 0.3s ease;
}

.pick-card:hover {
    border-color: var(--club-gold);
}

.pick-media {
    margin: 0 0 14px;
}

.pick-media img {
    width: 100%;
    aspect-ratio: 3 / 4;
    max-height: 340px;
    object-fit: cover;
}

.pick-card:nth-child(1) .pick-media img {
    object-position: 50% 15%;
}

.pick-card:nth-child(2) .pick-media img {
    object-position: 50% 45%;
}

.pick-card:nth-child(3) .pick-media img {
    object-position: 50% 30%;
}

.pick-card:nth-child(4) .pick-media img {
    object-position: 50% 65%;
}

.pick-name {
    display: block;
    padding: 0 4px;
    font-size: 14px;
    letter-spacing: 0.08em;
}

/* ---------- 首页 2：热门内容（左大图右三条） ---------- */

.hot-2col {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: start;
}

.hot-lead {
    margin: 0;
}

.hot-lead img {
    width: 100%;
    aspect-ratio: 16 / 9;
    max-height: 420px;
    object-fit: cover;
    object-position: 50% 25%;
}

.hot-lead figcaption {
    margin-top: 16px;
    font-size: 13px;
    color: var(--club-mute);
}

.hot-lines {
    display: grid;
    gap: 28px;
}

.hot-line {
    padding-top: 18px;
    border-top: 1px solid var(--club-line);
}

.hot-meta {
    margin: 0 0 6px;
    font-size: 12px;
    letter-spacing: 0.24em;
    color: var(--club-gold);
}

.hot-line h3 {
    margin: 0 0 8px;
    font-size: 18px;
    font-weight: 400;
    line-height: 1.6;
}

.hot-line p {
    margin: 0;
    font-size: 14px;
    line-height: 1.9;
    color: var(--club-soft);
}

/* ---------- 首页 3：移动端体验（左机身右说明） ---------- */

.mobile-duo {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 64px;
    align-items: center;
}

.device-mock {
    display: flex;
    justify-content: center;
}

.device-frame {
    width: 100%;
    max-width: 268px;
    padding: 10px;
    border: 1px solid var(--club-gold);
    border-radius: 30px;
}

.device-frame img {
    width: 100%;
    aspect-ratio: 9 / 19;
    max-height: 470px;
    object-fit: cover;
    object-position: 50% 38%;
    border-radius: 20px;
}

.mobile-notes p {
    max-width: 62ch;
    margin: 0 0 18px;
    color: var(--club-soft);
}

/* ---------- 首页 4：会员权益（三列两行方格） ---------- */

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 46px 40px;
}

.benefit {
    text-align: center;
}

.benefit-icon {
    width: 56px;
    margin: 0 auto 16px;
}

.benefit-icon img {
    width: 56px;
    height: 56px;
    object-fit: cover;
}

.benefit:nth-child(1) .benefit-icon img {
    object-position: 50% 40%;
}

.benefit:nth-child(2) .benefit-icon img {
    object-position: 50% 45%;
}

.benefit:nth-child(3) .benefit-icon img {
    object-position: 50% 75%;
}

.benefit:nth-child(4) .benefit-icon img {
    object-position: 50% 80%;
}

.benefit:nth-child(5) .benefit-icon img {
    object-position: 50% 20%;
}

.benefit:nth-child(6) .benefit-icon img {
    object-position: 50% 70%;
}

.benefit h3 {
    margin: 0 0 8px;
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.06em;
}

.benefit p {
    max-width: 30ch;
    margin: 0 auto;
    font-size: 13.5px;
    line-height: 1.9;
    color: var(--club-mute);
}

/* ---------- 首页 5：专题通栏 ---------- */

.topic-wide {
    margin: 0 0 44px;
}

.topic-wide img {
    width: 100%;
    aspect-ratio: 3 / 1;
    max-height: 380px;
    object-fit: cover;
    object-position: 50% 40%;
}

.topic-wide figcaption {
    margin-top: 16px;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--club-mute);
}

.topic-caption {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 56px;
    align-items: start;
}

.topic-caption .band-title {
    margin-bottom: 0;
}

.topic-body p {
    margin: 0 0 18px;
    color: var(--club-soft);
}

/* ---------- 首页 6：口碑三列 ---------- */

.voice-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 40px;
}

.voice {
    margin: 0;
    padding-left: 22px;
    border-left: 2px solid var(--club-gold);
}

.voice p {
    margin: 0 0 14px;
    font-size: 14.5px;
    line-height: 1.95;
    color: var(--club-soft);
}

.voice cite {
    font-style: normal;
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--club-mute);
}

/* ---------- 首页 7：常见问题 ---------- */

.faq-club {
    max-width: 780px;
    border-top: 1px solid var(--club-line);
}

.faq-club details {
    border-bottom: 1px solid var(--club-line);
}

.faq-club summary {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 0;
    font-size: 16px;
    cursor: pointer;
    list-style: none;
}

.faq-club summary::-webkit-details-marker {
    display: none;
}

.faq-club summary::after {
    content: "+";
    flex: 0 0 auto;
    font-size: 18px;
    line-height: 1;
    color: var(--club-gold);
}

.faq-club details[open] summary::after {
    content: "−";
}

.faq-club details p {
    max-width: 66ch;
    margin: 0 0 22px;
    font-size: 14px;
    line-height: 1.95;
    color: var(--club-soft);
}

/* ---------- 内页 about ---------- */

.about-club {
    padding-top: 28px;
    padding-bottom: 0;
}

.about-figure {
    position: relative;
    margin: 0;
}

.about-figure img {
    width: 100%;
    aspect-ratio: 21 / 9;
    max-height: 460px;
    object-fit: cover;
    object-position: 50% 35%;
}

.about-veil {
    position: absolute;
    left: 50%;
    top: 50%;
    width: min(720px, 86%);
    padding: 34px 36px 30px;
    text-align: center;
    background-color: rgba(253, 251, 247, 0.93);
    border: 1px solid var(--club-gold);
    transform: translate(-50%, -50%);
}

.about-veil h1 {
    margin: 0 0 12px;
    font-size: 34px;
    font-weight: 400;
    letter-spacing: 0.06em;
}

.about-veil h2 {
    margin: 0 0 12px;
    font-size: 24px;
    font-weight: 400;
    letter-spacing: 0.06em;
}

.about-veil p {
    max-width: 60ch;
    margin: 0 auto;
    font-size: 14.5px;
    color: var(--club-soft);
}

.about-copy {
    margin-top: 56px;
}

.about-copy p {
    max-width: 66ch;
    margin: 0 0 20px;
    color: var(--club-soft);
}

.about-values-band {
    margin-top: 84px;
}

.about-values-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px 48px;
    margin-top: 0;
}

.about-value {
    padding-top: 24px;
    border-top: 1px solid var(--club-gold);
}

.about-value h3 {
    margin: 0 0 12px;
    font-size: 17px;
    font-weight: 400;
}

.about-value p {
    margin: 0;
    font-size: 14px;
    line-height: 1.9;
    color: var(--club-soft);
}

.about-service-note {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 56px;
    align-items: center;
    margin-top: 84px;
}

.about-service-note h2 {
    margin: 0 0 18px;
    font-size: 24px;
    font-weight: 400;
}

.about-service-note p {
    margin: 0 0 18px;
    color: var(--club-soft);
}

.about-note-figure {
    margin: 0;
}

.about-note-figure img {
    width: 100%;
    aspect-ratio: 3 / 4;
    max-height: 380px;
    object-fit: cover;
    object-position: 50% 70%;
}

.about-quiet {
    max-width: 68ch;
    margin-top: 84px;
    padding-left: 24px;
    border-left: 2px solid var(--club-gold);
}

.about-quiet h2 {
    margin: 0 0 16px;
    font-size: 21px;
    font-weight: 400;
}

.about-quiet p {
    margin: 0 0 18px;
    color: var(--club-soft);
}

/* ---------- 内页 product ---------- */

.prod-lead {
    padding-top: 58px;
}

.prod-lead h1 {
    margin: 0 0 20px;
    max-width: 26ch;
    font-size: 34px;
    font-weight: 400;
    line-height: 1.45;
}

.prod-lead p {
    max-width: 66ch;
    margin: 0;
    color: var(--club-soft);
}

.prod-club {
    padding-top: 72px;
}

.prod-item {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 56px;
    align-items: center;
    padding: 64px 0;
    border-top: 1px solid var(--club-line);
}

.prod-item:first-child {
    padding-top: 0;
    border-top: 0;
}

.prod-item:nth-child(3) .prod-media img {
    object-position: 50% 80%;
}

.prod-item h2 {
    margin: 0 0 16px;
    font-size: 23px;
    font-weight: 400;
}

.prod-item p {
    max-width: 62ch;
    margin: 0 0 18px;
    color: var(--club-soft);
}

.prod-media {
    margin: 0;
}

.prod-media img {
    width: 100%;
    aspect-ratio: 3 / 4;
    max-height: 400px;
    object-fit: cover;
}

.prod-item.is-flip {
    grid-template-columns: minmax(0, 1fr) 300px;
}

.prod-item.is-flip .prod-media {
    order: 2;
}

.prod-item.is-flip .prod-media img {
    object-position: 50% 82%;
}

.prod-points {
    margin: 0;
    padding: 0;
    list-style: none;
}

.prod-points li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--club-soft);
}

.prod-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 15px;
    width: 9px;
    height: 1px;
    background-color: var(--club-gold);
}

.prod-note {
    max-width: 66ch;
    padding-top: 44px;
    border-top: 1px solid var(--club-line);
}

.prod-note h2 {
    margin: 0 0 16px;
    font-size: 21px;
    font-weight: 400;
}

.prod-note p {
    margin: 0 0 16px;
    color: var(--club-soft);
}

/* ---------- 内页 news ---------- */

.news-club {
    padding-top: 58px;
}

.news-club h1 {
    margin: 0 0 20px;
    max-width: 26ch;
    font-size: 34px;
    font-weight: 400;
    line-height: 1.45;
}

.news-lead-text {
    max-width: 66ch;
    margin: 0 0 56px;
    color: var(--club-soft);
}

.news-pair {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 44px;
}

.news-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    max-height: 380px;
    object-fit: cover;
}

.news-card:nth-child(1) img {
    object-position: 50% 55%;
}

.news-card:nth-child(2) img {
    object-position: 50% 28%;
}

.news-chip {
    margin: 18px 0 8px;
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--club-gold);
}

.news-card h2 {
    margin: 0 0 10px;
    font-size: 21px;
    font-weight: 400;
    line-height: 1.6;
}

.news-card p {
    margin: 0;
    font-size: 14px;
    line-height: 1.9;
    color: var(--club-soft);
}

.news-lines {
    margin-top: 80px;
    border-top: 1px solid var(--club-gold);
}

.news-lines h2 {
    margin: 32px 0 8px;
    font-size: 22px;
    font-weight: 400;
}

.news-line {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) auto;
    gap: 24px;
    align-items: baseline;
    padding: 22px 0;
    border-bottom: 1px solid var(--club-line);
}

.news-index {
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--club-gold);
}

.news-line h3 {
    margin: 0 0 6px;
    font-size: 16px;
    font-weight: 400;
}

.news-line p {
    margin: 0;
    font-size: 13.5px;
    color: var(--club-mute);
}

.news-time {
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--club-mute);
    white-space: nowrap;
}

.news-closing {
    max-width: 66ch;
    margin-top: 52px;
}

.news-closing h2 {
    margin: 0 0 16px;
    font-size: 21px;
    font-weight: 400;
}

.news-closing p {
    margin: 0 0 18px;
    color: var(--club-soft);
}

/* ---------- 内页 contact ---------- */

.contact-club {
    padding-top: 58px;
}

.contact-head {
    text-align: center;
}

.contact-head h1 {
    margin: 0 auto 18px;
    max-width: 24ch;
    font-size: 34px;
    font-weight: 400;
    line-height: 1.45;
}

.contact-head p {
    max-width: 62ch;
    margin: 0 auto;
    color: var(--club-soft);
}

.contact-figure {
    margin: 46px 0 0;
}

.contact-figure img {
    width: 100%;
    aspect-ratio: 3 / 1;
    max-height: 320px;
    object-fit: cover;
    object-position: 50% 62%;
}

.contact-cols {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px;
    margin-top: 80px;
}

.contact-col {
    padding: 30px 28px;
    background-color: var(--club-card);
    border: 1px solid var(--club-line);
}

.contact-col h2 {
    margin: 0 0 16px;
    font-size: 20px;
    font-weight: 400;
}

.contact-col p {
    margin: 0 0 14px;
    font-size: 14px;
    line-height: 1.9;
    color: var(--club-soft);
}

.contact-form {
    max-width: 720px;
    margin-top: 80px;
    padding: 36px 32px 32px;
    border: 1px solid var(--club-gold);
}

.contact-form h2 {
    margin: 0 0 10px;
    font-size: 21px;
    font-weight: 400;
}

.form-intro {
    margin: 0 0 26px;
    font-size: 13.5px;
    color: var(--club-mute);
}

.contact-field {
    margin-bottom: 20px;
}

.contact-field label {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--club-gold);
}

.contact-field input,
.contact-field textarea {
    width: 100%;
    padding: 12px 14px;
    font-family: inherit;
    font-size: 14px;
    color: var(--club-ink);
    background-color: var(--club-paper);
    border: 1px solid var(--club-line);
}

.contact-field textarea {
    min-height: 132px;
    resize: vertical;
}

.contact-btn {
    padding: 12px 30px;
    font-family: inherit;
    font-size: 13px;
    letter-spacing: 0.18em;
    color: var(--club-ink);
    background-color: transparent;
    border: 1px solid var(--club-ink);
    cursor: pointer;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.contact-btn:hover {
    color: var(--club-gold);
    border-color: var(--club-gold);
}

.form-note {
    margin: 18px 0 0;
    font-size: 12px;
    line-height: 1.8;
    color: var(--club-mute);
}

.contact-help {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 48px;
    align-items: center;
    margin-top: 80px;
    padding-top: 44px;
    border-top: 1px solid var(--club-line);
}

.contact-help h2 {
    margin: 0 0 16px;
    font-size: 21px;
    font-weight: 400;
}

.contact-help p {
    margin: 0 0 16px;
    color: var(--club-soft);
}

.contact-help-figure {
    margin: 0;
}

.contact-help-figure img {
    width: 100%;
    aspect-ratio: 1 / 1;
    max-height: 220px;
    object-fit: cover;
    object-position: 50% 68%;
}

/* ---------- 内页 app ---------- */

.app-club {
    padding-top: 26px;
}

.app-figure {
    margin: 0;
}

.app-figure img {
    width: 100%;
    aspect-ratio: 16 / 9;
    max-height: 440px;
    object-fit: cover;
    object-position: 50% 42%;
}

.app-head {
    margin-top: 40px;
}

.app-head h1 {
    margin: 0 0 18px;
    max-width: 26ch;
    font-size: 34px;
    font-weight: 400;
    line-height: 1.45;
}

.app-head p {
    max-width: 64ch;
    margin: 0;
    color: var(--club-soft);
}

.app-benefits-band {
    margin-top: 56px;
}

.app-benefits-band .app-benefits {
    margin-top: 0;
}

.app-benefits {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
    margin-top: 56px;
}

.app-benefit {
    padding-top: 20px;
    border-top: 1px solid var(--club-gold);
}

.benefit-no {
    display: block;
    margin-bottom: 12px;
    font-size: 12px;
    letter-spacing: 0.24em;
    color: var(--club-gold);
}

.app-benefit h3 {
    margin: 0 0 10px;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.6;
}

.app-benefit p {
    margin: 0;
    font-size: 13.5px;
    line-height: 1.9;
    color: var(--club-soft);
}

.app-guide {
    margin-top: 84px;
}

.app-guide h2 {
    margin: 0 0 32px;
    font-size: 26px;
    font-weight: 400;
}

.app-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 40px;
}

.app-step h3 {
    margin: 0 0 12px;
    font-size: 17px;
    font-weight: 400;
}

.app-step p {
    margin: 0 0 14px;
    font-size: 14px;
    line-height: 1.9;
    color: var(--club-soft);
}

.app-note {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 56px;
    align-items: center;
    margin-top: 84px;
    padding-top: 44px;
    border-top: 1px solid var(--club-line);
}

.app-note h2 {
    margin: 0 0 16px;
    font-size: 22px;
    font-weight: 400;
}

.app-note p {
    margin: 0 0 16px;
    color: var(--club-soft);
}

.app-device {
    margin: 0;
    padding-left: 12px;
    border-left: 2px solid var(--club-gold);
}

.app-device img {
    width: 100%;
    aspect-ratio: 3 / 4;
    max-height: 320px;
    object-fit: cover;
    object-position: 50% 62%;
}

.app-foot-note {
    max-width: 68ch;
    margin-top: 84px;
}

.app-foot-note h2 {
    margin: 0 0 16px;
    font-size: 21px;
    font-weight: 400;
}

.app-foot-note p {
    margin: 0 0 18px;
    color: var(--club-soft);
}

/* ---------- footer：居中三段 ---------- */

.club-foot {
    margin-top: 40px;
    padding: 62px 0 46px;
    border-top: 1px solid var(--club-gold);
}

.foot-inner {
    display: grid;
    gap: 40px;
}

.foot-brand {
    text-align: center;
}

.foot-mark {
    margin: 0 0 10px;
    font-size: 19px;
    letter-spacing: 0.42em;
}

.foot-line {
    max-width: 62ch;
    margin: 0 auto;
    font-size: 13px;
    line-height: 1.9;
    color: var(--club-mute);
}

.foot-cols {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, auto));
    justify-content: center;
    gap: 0 64px;
}

.foot-col ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.foot-col li + li {
    margin-top: 9px;
}

.foot-col a {
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--club-soft);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 0.3s ease, border-color 0.3s ease;
}

.foot-col a:hover {
    color: var(--club-gold);
    border-bottom-color: var(--club-gold);
}

.foot-title {
    margin: 0 0 14px;
    font-size: 12px;
    letter-spacing: 0.24em;
    color: var(--club-gold);
}

.foot-copy {
    margin: 0;
    text-align: center;
    font-size: 12px;
    line-height: 1.9;
    color: var(--club-mute);
}

/* ---------- 细线进入视口时的颜色变化（正文不做隐藏与位移） ---------- */

.club-js .hot-line,
.club-js .about-value,
.club-js .app-benefit,
.club-js .news-line {
    transition: border-color 0.8s ease;
}

.club-js .hot-line.is-in,
.club-js .about-value.is-in,
.club-js .app-benefit.is-in {
    border-top-color: var(--club-gold);
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
    .hero-grid {
        grid-template-columns: minmax(0, 1fr) 280px;
    }

    .club-card {
        margin-left: -48px;
        padding: 28px 24px 24px;
    }

    .mobile-duo,
    .about-service-note,
    .app-note {
        grid-template-columns: minmax(0, 1fr) 260px;
        gap: 40px;
    }

    .prod-item,
    .prod-item.is-flip {
        grid-template-columns: 240px minmax(0, 1fr);
        gap: 40px;
    }

    .prod-item.is-flip .prod-media {
        order: 0;
    }
}

@media (max-width: 900px) {
    .club-js .nav-toggle {
        display: inline-flex;
    }

    .club-js .club-nav {
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        display: none;
        max-height: calc(100vh - 96px);
        overflow-y: auto;
        padding: 12px 32px 26px;
        background-color: var(--club-paper);
        border-bottom: 1px solid var(--club-line);
    }

    .club-js .club-nav.is-open {
        display: block;
    }

    .club-js .club-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }

    .club-js .club-nav a {
        padding: 12px 0;
        font-size: 17px;
        letter-spacing: 0.2em;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .club-figure {
        margin-bottom: 76px;
    }

    .club-card {
        margin-left: 0;
        padding: 28px 24px 26px;
    }

    .hot-2col,
    .topic-caption,
    .about-values-row,
    .news-pair,
    .contact-cols,
    .app-steps {
        grid-template-columns: minmax(0, 1fr);
        gap: 36px;
    }

    .mobile-duo,
    .about-service-note,
    .app-note,
    .contact-help,
    .prod-item,
    .prod-item.is-flip {
        grid-template-columns: minmax(0, 1fr);
        gap: 32px;
    }

    .prod-item.is-flip .prod-media {
        order: 0;
    }

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

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

    .voice-row {
        grid-template-columns: minmax(0, 1fr);
        gap: 30px;
    }

    .club-band {
        padding-top: 72px;
        padding-bottom: 72px;
    }

    .contact-help-figure img,
    .about-note-figure img {
        max-height: 300px;
    }

    .app-device {
        max-width: 320px;
    }
}

@media (max-width: 640px) {
    .club-shell {
        padding-left: 20px;
        padding-right: 20px;
    }

    .top-slim {
        height: auto;
        padding: 8px 0;
    }

    .top-brand {
        flex-basis: 100%;
        order: 2;
        text-align: left;
    }

    .club-hero {
        padding-top: 40px;
    }

    .club-hero h1,
    .prod-lead h1,
    .news-club h1,
    .contact-head h1,
    .app-head h1,
    .about-veil h1 {
        font-size: 27px;
    }

    .band-title {
        font-size: 23px;
        max-width: 100%;
    }

    .hero-overlay {
        right: 4%;
        bottom: -40px;
        width: 118px;
        max-height: 158px;
        border-width: 8px;
    }

    .pick-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }

    .benefit-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 34px;
    }

    .app-benefits {
        grid-template-columns: minmax(0, 1fr);
    }

    .news-line {
        grid-template-columns: 40px minmax(0, 1fr);
        gap: 14px;
    }

    .news-time {
        grid-column: 2;
    }

    .foot-cols {
        grid-template-columns: minmax(0, 1fr);
        gap: 32px;
        justify-items: center;
        text-align: center;
    }

    .contact-form {
        padding: 26px 20px 24px;
    }

    .club-band {
        padding-top: 56px;
        padding-bottom: 56px;
    }

    .faq-club summary {
        font-size: 15px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .club-body * {
        transition-duration: 0.01ms !important;
    }

    .club-js .hot-line,
    .club-js .about-value,
    .club-js .app-benefit {
        border-top-color: var(--club-gold);
    }
}