:root {
    --ink: #172033;
    --navy: #10243f;
    --deep: #08182c;
    --amber: #c8890a;
    --gold: #f3d48a;
    --paper: #f3f6fb;
    --card: #fff;
    --line: #d5deea;
    --muted: #5c6b80;
    --link: #1d4e89;
}

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

html {
    scrollbar-gutter: stable;
}

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
    color: var(--ink);
    background-color: var(--paper);
    background-image:
        linear-gradient(180deg, rgba(243, 246, 251, 0.94), rgba(243, 246, 251, 0.93)),
        url("../image/bg-floor.jpg");
    background-size: auto, cover;
    background-position: center top;
    line-height: 1.65;
}

:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 2px;
}

a {
    color: var(--link);
}

img {
    max-width: 100%;
    height: auto;
}

.wrap {
    width: min(1120px, calc(100% - 36px));
    margin: 0 auto;
}

.util {
    background: var(--deep);
    color: #d5deea;
    font-size: 0.8rem;
}

.util a {
    color: var(--gold);
    text-decoration: none;
}

.util-in,
.bar-in,
.fine {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 18px;
}

.util-in {
    padding: 8px 0;
}

.bar {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--line);
}

.bar-in {
    justify-content: space-between;
    padding: 12px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--ink);
}

.logo-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    background: var(--navy);
    color: var(--gold);
    border-radius: 10px;
    font-weight: 800;
    letter-spacing: 0;
}

.logo strong {
    display: block;
    font-size: 1.2rem;
    letter-spacing: 0.14em;
}

.logo small {
    display: block;
    color: var(--muted);
    font-size: 0.74rem;
}

.nav ul {
    display: flex;
    gap: 18px;
    list-style: none;
    flex-wrap: wrap;
}

.nav a {
    text-decoration: none;
    color: #243044;
    font-weight: 600;
    font-size: 0.94rem;
    border-bottom: 2px solid transparent;
    padding-bottom: 2px;
}

.nav a:hover,
.nav a.is-on {
    color: var(--navy);
    border-bottom-color: var(--amber);
}

.nav-btn {
    display: none;
    border: 1px solid var(--navy);
    background: #fff;
    color: var(--navy);
    border-radius: 999px;
    padding: 8px 14px;
    font: inherit;
    cursor: pointer;
}

.hero {
    min-height: clamp(340px, 56vh, 600px);
    display: flex;
    align-items: center;
    color: #fff;
    background:
        linear-gradient(105deg, rgba(8, 18, 36, 0.9) 6%, rgba(16, 36, 63, 0.46) 72%),
        url("../image/bg-night.jpg") center / cover no-repeat;
}

.hero-copy {
    max-width: 680px;
    padding: 72px 0 96px;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    padding: 4px 10px;
    border: 1px solid rgba(243, 212, 138, 0.75);
    color: var(--gold);
    letter-spacing: 0.12em;
    font-size: 0.74rem;
}

.hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    line-height: 1.25;
}

.hero p {
    margin: 14px 0 20px;
    color: #e4ebf5;
    font-size: 1.05rem;
}

.actions,
.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn {
    display: inline-block;
    text-decoration: none;
    border-radius: 999px;
    padding: 11px 18px;
    font-weight: 700;
    border: 1px solid transparent;
}

.btn-solid {
    background: var(--amber);
    color: #1c1404 !important;
}

.btn-ghost {
    background: transparent;
    color: #fff !important;
    border-color: rgba(255, 255, 255, 0.75);
}

.btn-navy {
    background: transparent;
    color: var(--navy) !important;
    border-color: var(--navy);
}

.chip {
    background: rgba(0, 0, 0, 0.28);
    border: 1px solid rgba(243, 212, 138, 0.35);
    color: #f6edd6;
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 0.84rem;
}

.lift {
    margin-top: 14px;
}

.band {
    position: relative;
    z-index: 2;
    margin-top: -42px;
}

.band-in {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: 0 10px 28px rgba(8, 24, 44, 0.08);
}

.band-in div {
    padding: 18px 20px;
}

.band-in div + div {
    border-left: 1px solid var(--line);
}

.band-in b {
    display: block;
    color: var(--navy);
    font-size: 1.4rem;
}

.band-in span {
    color: var(--muted);
    font-size: 0.86rem;
}

.block {
    padding: 64px 0;
    scroll-margin-top: 92px;
}

.later {
    content-visibility: auto;
    contain-intrinsic-size: 1px 640px;
}

.block-title {
    margin-bottom: 22px;
}

.block-title h1,
.block-title h2 {
    font-size: clamp(1.45rem, 2.4vw, 1.85rem);
    line-height: 1.3;
}

.block-title p {
    margin-top: 8px;
    color: var(--muted);
    max-width: 640px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.card[hidden] {
    display: none;
}

.card:hover {
    border-color: #b9c8dc;
}

.card-pic {
    position: relative;
    aspect-ratio: 3 / 2;
    background: #d7e0ec;
}

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

.tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(16, 36, 63, 0.88);
    color: var(--gold);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    padding: 3px 8px;
    border-radius: 999px;
}

.card-body {
    padding: 14px 16px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.card-body h3 {
    font-size: 1.06rem;
}

.card-body p {
    color: #3e4c60;
    font-size: 0.92rem;
}

.more {
    margin-top: auto;
    font-weight: 700;
    text-decoration: none;
    color: var(--navy);
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.filters button {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    border-radius: 999px;
    padding: 7px 14px;
    font: inherit;
    cursor: pointer;
}

.filters button.is-on {
    background: var(--navy);
    color: #fff;
    border-color: var(--navy);
}

.split {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 28px;
    align-items: stretch;
}

.split img {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
    border-radius: 16px;
}

.steps {
    display: grid;
    gap: 14px;
}

.steps article,
.note,
.acc {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
}

.steps article,
.note {
    padding: 16px 16px 18px;
}

.steps h3,
.note h3 {
    margin-bottom: 6px;
    font-size: 1.02rem;
}

.steps p,
.note p,
.acc p {
    color: #3e4c60;
    font-size: 0.93rem;
}

.notes,
.acc-list {
    display: grid;
    gap: 12px;
}

.acc button {
    width: 100%;
    text-align: left;
    background: none;
    border: 0;
    font: inherit;
    font-weight: 700;
    padding: 14px 16px;
    cursor: pointer;
    color: var(--ink);
}

.acc p {
    display: none;
    padding: 0 16px 14px;
}

.acc.is-open p {
    display: block;
}

.quote {
    background: var(--navy);
    color: #e7eef8;
    border-radius: 18px;
    padding: 28px;
}

.quote h2 {
    color: #fff;
}

.quote p,
.quote li {
    color: #d5deea;
}

.quote a {
    color: var(--gold);
}

.quote-list {
    list-style: none;
    margin: 14px 0 18px;
}

.quote-list li + li {
    margin-top: 6px;
}

.crumb {
    font-size: 0.86rem;
    color: var(--muted);
    margin-bottom: 16px;
}

.crumb a {
    text-decoration: none;
}

.prose {
    max-width: 820px;
}

.prose h1 {
    font-size: 1.85rem;
    margin-bottom: 10px;
}

.prose h2 {
    font-size: 1.18rem;
    margin: 26px 0 8px;
}

.prose p,
.prose li {
    color: #2d3b4e;
    margin-bottom: 10px;
}

.prose ul {
    padding-left: 1.15rem;
}

.detail {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 28px;
    align-items: start;
}

.detail ul {
    margin-top: 8px;
    padding-left: 1.2rem;
}

.detail li + li {
    margin-top: 6px;
}

.shot {
    width: 100%;
    border-radius: 16px;
    display: block;
    background: #d7e0ec;
}

.caption {
    margin-top: 8px;
    color: var(--muted);
    font-size: 0.82rem;
}

.sheet {
    width: 100%;
    border-collapse: collapse;
    margin: 14px 0 16px;
    font-size: 0.92rem;
}

.sheet th,
.sheet td {
    border: 1px solid var(--line);
    padding: 9px 12px;
    text-align: left;
    vertical-align: top;
}

.sheet th {
    width: 28%;
    background: #eef3f9;
}

.foot {
    background: var(--deep);
    color: #c5d0de;
    padding: 34px 0 18px;
    margin-top: 12px;
}

.foot-cols {
    display: grid;
    grid-template-columns: 1.4fr 0.7fr 1.2fr;
    gap: 24px;
}

.foot h3 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 8px;
}

.foot a {
    color: var(--gold);
    text-decoration: none;
}

.foot p,
.foot li {
    font-size: 0.88rem;
    line-height: 1.7;
}

.foot ul {
    list-style: none;
}

.fine {
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid #1d314c;
    font-size: 0.8rem;
}

@media (max-width: 860px) {
    .nav-btn {
        display: inline-flex;
    }

    .nav {
        display: none;
        width: 100%;
        padding-top: 8px;
    }

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

    .nav ul {
        flex-direction: column;
        gap: 10px;
    }

    .grid,
    .split,
    .detail,
    .foot-cols {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .wrap {
        width: calc(100% - 28px);
    }

    .block {
        padding: 42px 0;
    }

    .later {
        contain-intrinsic-size: 1px 520px;
    }

    .grid,
    .split,
    .detail,
    .foot-cols,
    .band-in {
        grid-template-columns: 1fr;
    }

    .band-in div + div {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .split img {
        height: 220px;
    }

    .hero-copy {
        padding: 48px 0 72px;
    }
}