@charset "UTF-8";

:root {
    --ink: #161616;
    --ink-soft: #353535;
    --paper: #f5f3ee;
    --white: #ffffff;
    --line: #d5d1c8;
    --muted: #67645e;
    --shadow: rgba(20, 20, 20, 0.12);
    --rail: clamp(184px, 16vw, 248px);
    --header-height: 68px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    overflow-x: hidden;
    color: var(--ink);
    background: var(--paper);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

button,
a,
summary {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
}

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

.page-top {
    position: absolute;
    top: 0;
}

.site-header {
    position: fixed;
    z-index: 30;
    top: 0;
    right: 0;
    left: 0;
    display: flex;
    min-height: var(--header-height);
    padding: 9px clamp(16px, 2.8vw, 46px);
    align-items: center;
    justify-content: space-between;
    color: var(--white);
    background: var(--ink);
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.brand,
.footer-brand {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: 10px;
}

.brand img,
.footer-brand img {
    width: 42px;
    height: 42px;
    padding: 3px;
    object-fit: contain;
    background: var(--white);
    border-radius: 50%;
}

.brand-copy,
.footer-brand div {
    display: grid;
    min-width: 0;
    gap: 2px;
}

.brand strong,
.footer-brand strong {
    font-size: 17px;
    line-height: 1.1;
}

.brand-copy span,
.footer-brand span {
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    line-height: 1.1;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-download,
.hero-download,
.download-section a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--white);
    font-weight: 800;
    background: var(--ink);
    border: 1px solid var(--white);
}

.header-download {
    min-height: 42px;
    padding: 0 15px;
    font-size: 14px;
}

.header-download b,
.hero-download b,
.download-section b {
    font-size: 18px;
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    padding: 9px;
    cursor: pointer;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.7);
}

.menu-toggle span {
    display: block;
    height: 2px;
    margin: 4px 0;
    background: var(--white);
}

.channel-nav {
    position: fixed;
    z-index: 20;
    top: var(--header-height);
    bottom: 0;
    left: 0;
    display: flex;
    width: var(--rail);
    padding: clamp(18px, 2.4vw, 34px) 10px 26px;
    flex-direction: column;
    justify-content: space-between;
    background: var(--white);
    border-right: 1px solid var(--line);
}

.channel-nav ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

.channel-nav li + li {
    margin-top: 10px;
}

.channel-nav a {
    display: flex;
    min-height: 54px;
    padding: 13px 14px;
    align-items: center;
    justify-content: space-between;
    font-weight: 800;
    border: 1px solid var(--ink);
}

.channel-nav a:hover,
.channel-nav a.is-current {
    color: var(--white);
    background: var(--ink);
}

.channel-nav b {
    font-size: 11px;
}

.channel-nav p {
    padding: 24px 14px 0;
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    font-style: italic;
    line-height: 1.65;
    border-top: 1px solid var(--line);
}

.hero {
    position: relative;
    min-height: max(670px, 100vh);
    margin-top: var(--header-height);
    margin-left: var(--rail);
    padding: clamp(78px, 11vh, 148px) clamp(28px, 7vw, 120px) 70px;
    overflow: hidden;
    color: var(--white);
    background-image: linear-gradient(90deg, rgba(11, 11, 11, 0.88) 0%, rgba(11, 11, 11, 0.72) 38%, rgba(11, 11, 11, 0.22) 72%, rgba(11, 11, 11, 0.36) 100%), url("../images/bjt.jpg");
    background-position: center;
    background-size: cover;
}

.hero::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 34%;
    content: "";
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.52));
    pointer-events: none;
}

.hero-copy {
    position: relative;
    z-index: 1;
    max-width: 650px;
    padding: clamp(26px, 3.4vw, 48px);
    border-left: 6px solid var(--white);
    background: rgba(13, 13, 13, 0.76);
    box-shadow: 22px 22px 0 rgba(255, 255, 255, 0.13);
}

.eyebrow,
.section-kicker {
    margin: 0;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.14em;
}

.eyebrow {
    color: #d8d8d8;
}

.hero h1 {
    margin: 18px 0 0;
    font-size: clamp(54px, 7vw, 104px);
    line-height: 0.95;
    letter-spacing: -0.07em;
}

.hero-slogan {
    display: inline-block;
    max-width: 100%;
    padding: 6px 10px 8px;
    margin: 20px 0 0;
    color: var(--ink);
    font-size: clamp(27px, 3.2vw, 48px);
    font-weight: 900;
    line-height: 1.15;
    background: var(--white);
}

.hero-description {
    max-width: 580px;
    margin: 22px 0 0;
    font-size: 16px;
    line-height: 1.85;
}

.hero-tags {
    display: flex;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 8px;
}

.hero-tags span {
    padding: 6px 11px;
    font-size: 13px;
    border: 1px solid rgba(255, 255, 255, 0.7);
}

.hero-download {
    min-height: 52px;
    padding: 0 20px;
    margin-top: 22px;
    color: var(--ink);
    background: var(--white);
    border-color: var(--white);
}

.age-label {
    display: block;
    margin-top: 15px;
    color: #d4d4d4;
    font-size: 12px;
}

.page-content {
    margin-left: var(--rail);
}

.section {
    width: min(1200px, calc(100% - 48px));
    margin: 0 auto;
    padding: clamp(70px, 10vw, 130px) 0;
}

.section-heading {
    max-width: 570px;
}

.section-kicker {
    color: var(--muted);
}

.section h2 {
    margin: 8px 0 0;
    font-size: clamp(34px, 4.8vw, 58px);
    line-height: 1.05;
    letter-spacing: -0.06em;
}

.section-heading > p:last-child,
.discover-intro > p:not(.section-kicker),
.faq-intro > p:last-child {
    margin: 18px 0 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.85;
}

.schedule-board {
    margin-top: 42px;
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--ink);
}

.schedule-row {
    display: grid;
    grid-template-columns: 0.9fr 1.2fr 2.8fr;
    min-width: 620px;
}

.schedule-row + .schedule-row {
    border-top: 1px solid var(--line);
}

.schedule-row > * {
    padding: 14px 16px;
    font-size: 14px;
    line-height: 1.55;
}

.schedule-row > * + * {
    border-left: 1px solid var(--line);
}

.schedule-labels {
    color: var(--white);
    font-weight: 800;
    background: var(--ink);
}

.schedule-row strong {
    font-size: 15px;
}

.schedule-row b {
    font-size: 15px;
}

.schedule-row span {
    color: var(--muted);
}

.cover-rail {
    display: grid;
    grid-template-columns: repeat(5, minmax(140px, 1fr));
    margin-top: 26px;
    overflow-x: auto;
    gap: 10px;
    scrollbar-width: thin;
}

.cover-rail article {
    position: relative;
    min-width: 140px;
    min-height: 180px;
    overflow: hidden;
    color: var(--white);
    background: var(--ink);
}

.cover-rail img {
    width: 100%;
    height: 180px;
    object-fit: contain;
    background: #dedbd4;
}

.cover-rail div {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    padding: 20px 10px 10px;
    gap: 2px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.88));
}

.cover-rail b {
    font-size: 14px;
}

.cover-rail span {
    color: rgba(255, 255, 255, 0.76);
    font-size: 12px;
}

.discover {
    display: grid;
    grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.35fr);
    align-items: start;
    gap: clamp(34px, 7vw, 100px);
    border-top: 1px solid var(--line);
}

.discover-intro {
    position: sticky;
    top: 98px;
}

.discover-intro h2 {
    margin: 8px 0 0;
    font-size: clamp(34px, 4.8vw, 58px);
    line-height: 1.05;
    letter-spacing: -0.06em;
}

.discover-intro a {
    display: inline-flex;
    margin-top: 24px;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    font-weight: 800;
    border-bottom: 2px solid var(--ink);
}

.discover-intro a b {
    font-size: 20px;
}

.discover-panel {
    display: grid;
    grid-template-columns: minmax(280px, 1.1fr) minmax(230px, 0.9fr);
    gap: 12px;
}

.discover-feature {
    position: relative;
    min-height: 546px;
    overflow: hidden;
    color: var(--white);
    background: var(--ink);
}

.discover-feature::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 52%;
    content: "";
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.82));
}

.discover-feature img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.discover-feature div {
    position: absolute;
    z-index: 1;
    right: 24px;
    bottom: 24px;
    left: 24px;
}

.discover-feature span {
    color: #e7e7e7;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.discover-feature b {
    display: block;
    margin-top: 8px;
    font-size: 25px;
    line-height: 1.22;
}

.discover-notes {
    display: grid;
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.discover-notes article {
    display: flex;
    min-height: 0;
    padding: 24px;
    flex-direction: column;
    background: var(--white);
    border: 1px solid var(--line);
}

.discover-notes i {
    color: var(--muted);
    font-size: 13px;
    font-style: normal;
    font-weight: 900;
}

.discover-notes b {
    display: block;
    margin-top: auto;
    font-size: 21px;
}

.discover-notes p {
    margin: 9px 0 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.65;
}

.route {
    border-top: 1px solid var(--line);
}

.route-layout {
    display: grid;
    grid-template-columns: 1.35fr 0.65fr;
    margin-top: 42px;
    gap: 30px;
}

.route-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 2px solid var(--ink);
}

.route-steps article {
    min-height: 230px;
    padding: 22px 18px;
    background: var(--white);
    border: 1px solid var(--line);
    border-top: 0;
}

.route-steps article + article {
    border-left: 0;
}

.route-steps span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 900;
}

.route-steps b {
    display: block;
    margin-top: 58px;
    font-size: 20px;
}

.route-steps p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.75;
}

.route-note {
    position: relative;
    height: 280px;
    overflow: hidden;
    color: var(--white);
    background: var(--ink);
}

.route-note::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 60%;
    content: "";
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.88));
}

.route-note img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.route-note div {
    position: absolute;
    z-index: 1;
    right: 18px;
    bottom: 18px;
    left: 18px;
}

.route-note span {
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.route-note p {
    margin: 7px 0 0;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.6;
}

.faq {
    display: grid;
    grid-template-columns: 0.65fr 1.35fr;
    gap: clamp(34px, 8vw, 120px);
    border-top: 1px solid var(--line);
}

.faq-list {
    display: grid;
    gap: 10px;
}

.faq-list details {
    background: var(--white);
    border: 1px solid var(--line);
}

.faq-list summary {
    display: flex;
    min-height: 62px;
    padding: 18px 20px;
    cursor: pointer;
    align-items: center;
    justify-content: space-between;
    font-size: 15px;
    font-weight: 800;
    list-style: none;
}

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

.faq-list summary b {
    font-size: 22px;
    font-weight: 400;
}

.faq-list details[open] summary b {
    transform: rotate(45deg);
}

.faq-list details p {
    padding: 0 20px 19px;
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
}

.faq-list details p a {
    color: var(--ink);
    font-weight: 800;
    text-decoration: underline;
}

.gallery {
    border-top: 1px solid var(--line);
}

.gallery-heading {
    display: flex;
    max-width: none;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
}

.gallery-heading > p:last-child {
    max-width: 350px;
    margin: 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr 0.9fr;
    grid-template-rows: 225px 225px;
    margin-top: 40px;
    gap: 10px;
}

.gallery-grid figure {
    position: relative;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    color: var(--white);
    background: var(--ink);
}

.gallery-grid .gallery-main {
    grid-row: span 2;
}

.gallery-grid .gallery-wide {
    grid-column: span 2;
}

.gallery-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-grid figcaption {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    padding: 24px 14px 12px;
    font-size: 13px;
    font-weight: 800;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
}

.voices {
    width: 100%;
    padding: clamp(70px, 10vw, 120px) max(24px, calc((100% - 1200px) / 2));
    color: var(--white);
    background: var(--ink);
}

.voices-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
}

.voices .section-kicker {
    color: #bebebe;
}

.voices h2 {
    margin: 8px 0 0;
    font-size: clamp(34px, 4.8vw, 58px);
    line-height: 1.05;
    letter-spacing: -0.06em;
}

.voices-heading > p:last-child {
    max-width: 270px;
    margin: 0;
    color: #c7c7c7;
    font-size: 14px;
    line-height: 1.7;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin-top: 38px;
    gap: 14px;
}

.review-card {
    display: flex;
    min-height: 270px;
    padding: 20px;
    flex-direction: column;
    background: #272727;
    border: 1px solid #444;
}

.review-head {
    display: grid;
    grid-template-columns: 34px 1fr auto;
    align-items: center;
    gap: 9px;
}

.review-head span {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    color: var(--ink);
    font-size: 14px;
    font-weight: 900;
    background: var(--white);
    border-radius: 50%;
}

.review-head b {
    font-size: 14px;
}

.review-head em {
    color: #eeeeee;
    font-size: 12px;
    font-style: normal;
    letter-spacing: 0.08em;
}

.review-card > p {
    margin: 18px 0 0;
    color: #dddddd;
    font-size: 13px;
    line-height: 1.8;
}

.review-card time {
    margin-top: auto;
    padding-top: 18px;
    color: #adadad;
    font-size: 12px;
    text-align: right;
}

.download-section {
    width: min(1200px, calc(100% - 48px));
    padding: clamp(72px, 10vw, 120px) 0;
    margin: 0 auto;
    text-align: center;
}

.download-section h2 {
    max-width: 660px;
    margin: 12px auto 0;
    font-size: clamp(34px, 5.4vw, 64px);
    line-height: 1.05;
    letter-spacing: -0.06em;
}

.download-section p:not(.section-kicker) {
    margin: 17px auto 0;
    color: var(--muted);
    font-size: 15px;
}

.download-section a {
    min-height: 56px;
    padding: 0 23px;
    margin-top: 28px;
}

.site-footer {
    min-height: 230px;
    padding: 45px max(24px, calc((100% - 1200px) / 2));
    margin-left: var(--rail);
    color: var(--white);
    background: #0d0d0d;
}

.footer-brand {
    justify-content: center;
}

.footer-brand img {
    width: 48px;
    height: 48px;
}

.footer-nav {
    display: flex;
    margin-top: 28px;
    justify-content: center;
    flex-wrap: wrap;
}

.footer-nav a {
    padding: 0 14px;
    font-size: 14px;
    border-right: 1px solid #626262;
}

.footer-nav a:last-child {
    border-right: 0;
}

.site-footer > p {
    margin: 26px 0 0;
    color: #bcbcbc;
    font-size: 13px;
    text-align: center;
}

.back-top {
    position: fixed;
    z-index: 16;
    right: 24px;
    bottom: 24px;
    display: grid;
    width: 46px;
    height: 46px;
    cursor: pointer;
    place-items: center;
    color: var(--white);
    font-size: 20px;
    background: var(--ink);
    border: 1px solid var(--white);
    border-radius: 50%;
    box-shadow: 0 8px 24px var(--shadow);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid #888;
    outline-offset: 3px;
}

@media (max-width: 900px) {
    .discover,
    .faq {
        grid-template-columns: 1fr;
    }

    .discover-intro {
        position: static;
        max-width: 620px;
    }

    .route-layout {
        grid-template-columns: 1fr;
    }

    .route-note {
        height: 270px;
    }

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

@media (max-width: 680px) {
    :root {
        --header-height: 66px;
    }

    body {
        padding-top: var(--header-height);
    }

    .site-header {
        min-height: var(--header-height);
        padding: 9px 14px;
    }

    .brand {
        gap: 8px;
    }

    .brand img {
        width: 40px;
        height: 40px;
    }

    .brand strong {
        font-size: 15px;
    }

    .brand-copy span {
        font-size: 11px;
    }

    .header-download {
        min-height: 38px;
        padding: 0 10px;
        font-size: 12px;
        white-space: nowrap;
    }

    .header-download b {
        display: none;
    }

    .menu-toggle {
        display: block;
        flex: 0 0 auto;
    }

    .channel-nav {
        top: var(--header-height);
        bottom: auto;
        width: min(280px, 82vw);
        max-height: calc(100vh - var(--header-height));
        padding: 16px 12px 20px;
        overflow-y: auto;
        transform: translateX(-105%);
        transition: transform 0.18s ease;
        box-shadow: 12px 16px 28px rgba(0, 0, 0, 0.15);
    }

    .channel-nav.is-open {
        transform: translateX(0);
    }

    .channel-nav p {
        display: none;
    }

    .channel-nav a {
        min-height: 48px;
    }

    .hero,
    .page-content,
    .site-footer {
        margin-left: 0;
    }

    .hero {
        min-height: 620px;
        margin-top: 0;
        padding: 78px 16px 55px;
        background-position: 57% center;
    }

    .hero-copy {
        padding: 24px 19px;
        border-left-width: 4px;
        box-shadow: 11px 11px 0 rgba(255, 255, 255, 0.13);
    }

    .hero h1 {
        margin-top: 15px;
        font-size: 53px;
    }

    .hero-slogan {
        margin-top: 17px;
        font-size: 28px;
    }

    .hero-description {
        margin-top: 18px;
        font-size: 14px;
        line-height: 1.75;
    }

    .hero-download {
        min-height: 50px;
    }

    .section,
    .download-section {
        width: min(100% - 30px, 1200px);
        padding: 68px 0;
    }

    .section h2,
    .discover-intro h2,
    .voices h2 {
        font-size: 38px;
    }

    .schedule-board {
        overflow-x: auto;
    }

    .cover-rail {
        grid-template-columns: none;
        grid-auto-flow: column;
        grid-auto-columns: minmax(164px, 48vw);
        padding-bottom: 7px;
    }

    .discover-panel {
        grid-template-columns: 1fr;
    }

    .discover-feature {
        min-height: 390px;
    }

    .discover-notes {
        grid-template-columns: repeat(3, minmax(190px, 1fr));
        grid-template-rows: none;
        overflow-x: auto;
        padding-bottom: 7px;
    }

    .discover-notes article {
        min-height: 178px;
    }

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

    .route-steps article + article {
        border-top: 0;
        border-left: 1px solid var(--line);
    }

    .route-steps article {
        display: grid;
        min-height: 128px;
        grid-template-columns: 45px 1fr;
        gap: 4px 12px;
    }

    .route-steps b {
        margin-top: 0;
    }

    .route-steps p {
        grid-column: 2;
        margin-top: 0;
    }

    .faq {
        gap: 34px;
    }

    .gallery-heading,
    .voices-heading {
        display: block;
    }

    .gallery-heading > p:last-child,
    .voices-heading > p:last-child {
        margin-top: 15px;
    }

    .gallery-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 230px 170px 170px;
        margin-top: 30px;
    }

    .gallery-grid .gallery-main {
        grid-column: span 2;
        grid-row: auto;
    }

    .gallery-grid .gallery-wide {
        grid-column: span 2;
    }

    .voices {
        width: 100%;
        padding: 68px 15px;
    }

    .review-grid {
        grid-template-columns: 1fr;
        gap: 11px;
    }

    .review-card {
        min-height: 0;
    }

    .download-section {
        text-align: left;
    }

    .download-section h2 {
        margin-left: 0;
        font-size: 39px;
    }

    .download-section p:not(.section-kicker) {
        margin-left: 0;
        line-height: 1.7;
    }

    .download-section a {
        display: flex;
        width: fit-content;
        margin-right: auto;
        margin-left: auto;
    }

    .site-footer {
        min-height: 0;
        padding: 42px 20px;
        text-align: center;
    }

    .footer-brand {
        justify-content: center;
        text-align: left;
    }

    .footer-nav {
        gap: 12px 0;
    }

    .footer-nav a {
        padding: 0 10px;
        font-size: 13px;
    }

    .back-top {
        right: 16px;
        bottom: 16px;
        width: 43px;
        height: 43px;
    }
}

@media (max-width: 390px) {
    .header-actions {
        gap: 7px;
    }

    .header-download {
        padding: 0 8px;
        font-size: 11px;
    }

    .brand strong {
        font-size: 14px;
    }

    .brand-copy span {
        font-size: 10px;
    }
}