@charset "UTF-8";

:root {
    --ink: #211b1a;
    --paper: #f5efe5;
    --surface: #fffaf2;
    --fire: #e8552d;
    --ember: #ff9f4d;
    --line: #d9ccc0;
    --muted: #766b66;
    --navy: #26201e;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", sans-serif; line-height: 1.65; }
a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }
button { font: inherit; -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }

.site-header { position: fixed; z-index: 20; top: 0; right: 0; left: 0; height: 62px; display: flex; align-items: center; justify-content: space-between; padding: 0 18px; color: #fff; background: var(--fire); box-shadow: 0 1px 0 rgba(0, 0, 0, .2); }
.brand, .footer-brand { display: flex; align-items: center; gap: 9px; min-width: 0; }
.brand img, .footer-brand img { width: 34px; height: 34px; object-fit: cover; border-radius: 50%; background: #fff; }
.brand-copy, .footer-brand span { display: grid; gap: 1px; line-height: 1.05; }
.brand strong, .footer-brand strong { font-size: 17px; }
.brand small, .footer-brand small { font-size: 12px; opacity: .78; }
.header-tools { display: flex; align-items: center; gap: 9px; }
.header-download { padding: 10px 17px; color: var(--ink); font-size: 14px; font-weight: 800; line-height: 1; background: #fff; border: 2px solid var(--ink); border-radius: 5px; }
.nav-toggle { display: none; width: 39px; height: 36px; padding: 8px; cursor: pointer; background: transparent; border: 2px solid #fff; border-radius: 5px; }
.nav-toggle span { display: block; height: 2px; margin: 3px 0; background: #fff; }

.hero { display: grid; grid-template-columns: minmax(178px, 14.5vw) 1fr; min-height: 680px; padding-top: 62px; background: #bcb7b2; }
.channel-nav { position: relative; z-index: 2; display: flex; flex-direction: column; min-width: 0; padding: 22px 10px 28px; color: var(--ink); background: #fffdf9; border-right: 2px solid var(--ink); }
.channel-nav ul { padding: 0; margin: 0; list-style: none; }
.channel-nav a { display: flex; align-items: center; justify-content: space-between; min-height: 55px; padding: 0 13px; margin-bottom: 10px; font-weight: 800; border: 2px solid var(--ink); border-radius: 5px; transition: color .2s, background .2s; }
.channel-nav a:hover, .channel-nav a.is-current { color: #fff; background: var(--fire); }
.channel-nav b { font-size: 11px; }
.channel-nav > p { margin: auto 13px 0; color: var(--muted); font-size: 13px; font-style: italic; }
.hero-scene { position: relative; display: flex; align-items: center; min-height: 618px; padding: 68px 7vw; overflow: hidden; background: linear-gradient(90deg, rgba(16, 12, 11, .63), rgba(22, 17, 15, .16)), url("../images/bjt.jpg") center / cover no-repeat; }
.hero-scene::after { position: absolute; inset: 0; pointer-events: none; content: ""; background: repeating-linear-gradient(90deg, transparent 0 24%, rgba(255,255,255,.18) 24.1% 24.3%); mix-blend-mode: overlay; }
.hero-card { position: relative; z-index: 1; width: min(570px, 100%); padding: 30px 36px; color: #fff; background: rgba(22, 19, 18, .91); border-left: 7px solid var(--fire); border-radius: 0 5px 5px 0; }
.eyebrow, .section-heading > p, .community-copy > p, .download-panel > p { margin: 0; color: var(--ember); font-size: 12px; font-weight: 900; letter-spacing: .13em; }
.hero-card h1 { margin: 8px 0 0; font-size: clamp(58px, 7vw, 94px); line-height: .95; letter-spacing: -.08em; }
.hero-slogan { display: inline-block; margin: 20px 0 0; padding: 3px 8px 5px; color: #fff; font-size: clamp(29px, 3.7vw, 48px); font-weight: 900; line-height: 1.22; background: var(--fire); }
.hero-description { max-width: 490px; margin: 22px 0 0; font-size: 16px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.hero-tags span { padding: 4px 10px; font-size: 13px; border: 1px solid rgba(255, 255, 255, .7); border-radius: 5px; }
.hero-download, .download-panel a { display: inline-flex; align-items: center; gap: 18px; padding: 13px 19px; margin-top: 21px; color: var(--ink); font-weight: 900; background: #fff; border: 2px solid #fff; border-radius: 5px; }
.hero-download i, .download-panel i, .shelf-intro i, .community-copy i { font-size: 21px; font-style: normal; line-height: 1; }
.age-label { display: block; margin-top: 13px; color: #d6cbc3; font-size: 12px; }

.content { width: min(1200px, calc(100% - 40px)); margin-right: auto; margin-left: auto; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 5px 20px; margin-bottom: 23px; }
.section-heading h2 { margin: 0; font-size: clamp(30px, 4vw, 47px); line-height: 1.05; letter-spacing: -.06em; }
.section-heading h2::before { display: inline-block; width: 5px; height: .95em; margin-right: 10px; vertical-align: -.08em; content: ""; background: var(--fire); border-radius: 5px; }
.section-heading > span { max-width: 280px; color: var(--muted); font-size: 14px; }
.updates, .shelf-section, .guide-section, .faq-section, .suggestions { padding: 88px 0; }
.updates { padding-bottom: 65px; }
.update-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 3px solid var(--ink); }
.update-grid article { min-height: 205px; padding: 20px; background: var(--surface); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.update-grid article:first-child { border-left: 1px solid var(--line); }
.update-grid article.is-featured { color: #fff; background: var(--ink); }
.update-grid b { display: block; color: var(--fire); font-size: 13px; letter-spacing: .08em; }
.update-grid h3 { margin: 31px 0 5px; font-size: 19px; }
.update-grid p { margin: 0; font-size: 14px; }
.update-grid span { display: block; margin-top: 18px; color: var(--muted); font-size: 12px; }
.update-grid .is-featured span { color: #e5d4ca; }

.shelf-section { background: #e9dfd2; }
.shelf-intro { display: flex; align-items: end; justify-content: space-between; gap: 24px; padding: 20px 24px; margin-bottom: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 5px; }
.shelf-intro b { font-size: 20px; }.shelf-intro p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }.shelf-intro a { padding-bottom: 3px; color: var(--fire); font-weight: 900; white-space: nowrap; border-bottom: 2px solid currentColor; }
.cover-strip { display: grid; grid-template-columns: 1.1fr .9fr .9fr .9fr 1.1fr; gap: 10px; }
.cover-strip figure { position: relative; height: 212px; margin: 0; overflow: hidden; background: #d6cdc4; border: 2px solid var(--ink); border-radius: 5px; }
.cover-strip img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }.cover-strip figure:hover img { transform: scale(1.04); }
.cover-strip figcaption { position: absolute; right: 0; bottom: 0; left: 0; padding: 7px 9px; color: #fff; font-size: 13px; font-weight: 800; background: rgba(26, 22, 20, .78); }

.guide-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 52px; align-items: start; padding: 32px; background: var(--ink); border-radius: 5px; }
.guide-copy { color: #fff; }.guide-copy h3 { margin: 0; font-size: clamp(25px, 3vw, 38px); line-height: 1.2; }.guide-copy p { color: #d8cbc2; }
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; padding: 0; margin: 0; list-style: none; }.steps li { display: flex; gap: 12px; padding: 15px; background: #fffaf2; border-radius: 5px; }.steps b { color: var(--fire); font-size: 18px; }.steps h3 { margin: 0; font-size: 16px; }.steps p { margin: 4px 0 0; color: var(--muted); font-size: 13px; line-height: 1.45; }

.faq-section { padding-top: 72px; }.faq-list { border-top: 2px solid var(--ink); }.faq-list details { background: var(--surface); border-bottom: 1px solid var(--line); }.faq-list summary { display: flex; align-items: center; justify-content: space-between; padding: 19px 17px; cursor: pointer; font-size: 17px; font-weight: 800; list-style: none; }.faq-list summary::-webkit-details-marker { display: none; }.faq-list summary i { color: var(--fire); font-size: 25px; font-style: normal; font-weight: 400; transition: transform .2s; }.faq-list details[open] summary i { transform: rotate(45deg); }.faq-list details p { max-width: 800px; padding: 0 17px 20px; margin: 0; color: var(--muted); }

.suggestions { padding-top: 45px; }.suggestion-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }.suggestion-grid article { min-height: 150px; padding: 20px; background: #fffaf5; border: 1px solid var(--line); border-radius: 5px; }.suggestion-grid b { font-size: 17px; }.suggestion-grid p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.community { color: #fff; background: var(--ink); }.community-inner { display: grid; grid-template-columns: .75fr 1.25fr; gap: 45px; padding-top: 80px; padding-bottom: 80px; }.community-copy { padding-top: 7px; }.community-copy h2 { margin: 8px 0; font-size: clamp(33px, 4vw, 50px); line-height: 1; }.community-copy span { color: #cdbfb5; }.community-copy a { display: inline-flex; gap: 10px; margin-top: 28px; padding-bottom: 3px; color: var(--ember); font-weight: 900; border-bottom: 2px solid currentColor; }.review-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }.review-card { display: flex; flex-direction: column; min-height: 178px; padding: 18px; background: #39302d; border-radius: 5px; }.review-card header { display: flex; align-items: center; gap: 8px; }.review-avatar { display: grid; width: 31px; height: 31px; place-items: center; color: var(--ink); font-size: 12px; font-weight: 900; background: var(--ember); border-radius: 50%; }.review-card header b { margin-left: auto; color: #ffbd54; font-size: 12px; letter-spacing: 1px; }.review-card p { margin: 14px 0; color: #ede3dd; font-size: 13px; }.review-card time { margin-top: auto; color: #c4afa3; font-size: 12px; text-align: right; }

.download-panel { padding: 87px 20px; color: #fff; text-align: center; background: var(--fire); }.download-panel > p { color: #3a1712; }.download-panel h2 { margin: 7px 0 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.2; }.download-panel a { color: var(--fire); }
.site-footer { display: grid; justify-items: center; gap: 18px; padding: 43px 20px 25px; color: #e9e2d8; text-align: center; background: #171313; }.footer-brand { text-align: left; }.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 17px; font-size: 14px; }.footer-nav a:hover { color: var(--ember); }.copyright { width: 100%; margin: 3px 0 0; padding-top: 18px; font-size: 13px; border-top: 1px solid #403634; }
.back-top { position: fixed; z-index: 9; right: 20px; bottom: 22px; display: grid; width: 43px; height: 43px; place-items: center; color: #fff; cursor: pointer; visibility: hidden; opacity: 0; background: var(--fire); border: 1px solid #fff; border-radius: 50%; box-shadow: 0 8px 20px rgba(0,0,0,.2); transition: opacity .2s, visibility .2s; }.back-top.is-visible { visibility: visible; opacity: 1; }

@media (max-width: 760px) {
    .site-header { height: 64px; padding: 0 13px; }.brand { gap: 7px; }.brand img { width: 33px; height: 33px; }.brand strong { font-size: 16px; }.brand small { font-size: 11px; }.header-download { padding: 9px 10px; font-size: 13px; }.nav-toggle { display: block; }
    .hero { display: block; min-height: 0; padding-top: 64px; }.channel-nav { position: absolute; z-index: 19; top: 64px; right: 10px; left: 10px; display: none; padding: 11px; box-shadow: 0 12px 25px rgba(0,0,0,.24); border: 2px solid var(--ink); border-radius: 5px; }.channel-nav.is-open { display: block; }.channel-nav a { min-height: 45px; margin-bottom: 7px; }.channel-nav > p { display: none; }
    .hero-scene { min-height: 580px; padding: 61px 20px 38px; background-position: 57% center; }.hero-card { padding: 24px 19px 25px; border-left-width: 5px; }.hero-card h1 { font-size: 55px; }.hero-slogan { margin-top: 16px; font-size: 29px; }.hero-description { margin-top: 17px; font-size: 14px; }.hero-tags span { font-size: 12px; }.hero-download { margin-top: 17px; }
    .content { width: min(100% - 28px, 1200px); }.updates, .shelf-section, .guide-section, .faq-section, .suggestions { padding: 56px 0; }.section-heading { grid-template-columns: 1fr; gap: 5px; margin-bottom: 18px; }.section-heading > span { max-width: none; }
    .update-grid { grid-template-columns: repeat(2, 1fr); }.update-grid article { min-height: 180px; padding: 16px; }.update-grid article:nth-child(3) { border-left: 1px solid var(--line); }.update-grid h3 { margin-top: 22px; font-size: 17px; }
    .shelf-intro { display: block; padding: 17px; }.shelf-intro a { display: inline-block; margin-top: 13px; }.cover-strip { display: flex; gap: 10px; padding-bottom: 8px; overflow-x: auto; scroll-snap-type: x mandatory; }.cover-strip figure { flex: 0 0 160px; height: 218px; scroll-snap-align: start; }
    .guide-layout { grid-template-columns: 1fr; gap: 27px; padding: 21px; }.steps { grid-template-columns: 1fr; }.steps li { padding: 13px; }
    .faq-section { padding-top: 26px; }.faq-list summary { padding: 16px 13px; font-size: 15px; }.faq-list details p { padding: 0 13px 16px; font-size: 14px; }
    .suggestions { padding-top: 20px; }.suggestion-grid { grid-template-columns: repeat(2, 1fr); gap: 9px; }.suggestion-grid article { min-height: 148px; padding: 15px; }
    .community-inner { display: block; padding-top: 55px; padding-bottom: 55px; }.community-copy { padding: 0 3px 27px; }.community-copy h2 { font-size: 38px; }.review-list { grid-template-columns: 1fr; }.review-card { min-height: 0; }.review-card p { margin-bottom: 20px; }
    .download-panel { padding: 65px 16px; }.site-footer { padding: 35px 20px 22px; }.footer-brand { text-align: center; }.footer-nav { gap: 9px 14px; }.copyright { text-align: center; }.back-top { right: 14px; bottom: 16px; }
}

@media (max-width: 370px) { .header-download { padding: 9px 7px; font-size: 12px; }.header-tools { gap: 6px; }.hero-card h1 { font-size: 48px; }.hero-slogan { font-size: 26px; } }