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@media(max-width:600px){.wrap{width:calc(100% - 32px)}.header-inner{width:calc(100% - 30px)}.section{padding-block:42px}.hero h1{font-size:2.1rem;line-height:1.55}.hero-desc{font-size:1rem}.hero-checks{gap:12px;flex-wrap:wrap;font-size:.8rem}.hero-content{padding:38px 0 35px}.hero .eyebrow{font-size:.72rem;letter-spacing:.11em}.invitation-grid{grid-template-columns:1fr}.invitation{margin-top:0;padding:21px}.hero-bottom{font-size:.75rem}.section-heading{align-items:flex-start;gap:14px}.section-heading h2{font-size:1.5rem}.section-heading p{font-size:.9rem}.section-heading>a{font-size:.8rem;margin-top:5px}.route-grid{gap:12px}.route-card{padding:19px 16px}.route-card h3{font-size:1.06rem}.route-card p{font-size:.85rem}.article-grid,.category-grid,.split-section,.platform-grid,.resource-list,.contact-grid{grid-template-columns:1fr}.article-card{padding:23px}.category-tile{padding:20px}.community-banner{display:block;padding:29px}.community-banner .button{margin-top:24px}.community-banner h2{font-size:1.5rem}.page-head{padding:36px 0}.page-head h1{font-size:1.9rem}.page-head p:last-child{font-size:.95rem}.search-form{grid-template-columns:1fr auto;padding:16px;gap:9px}.search-form input{grid-column:1/-1}.search-form select{font-size:.9rem}.filter-chips{gap:6px}.reading-layout{width:100%}.breadcrumb{font-size:.8rem;padding:18px 0}.reading{border-inline:0;border-radius:0;padding:28px 21px}.article-header h1{font-size:1.72rem}.article-meta{font-size:.75rem}.article-body h2{font-size:1.25rem}.article-end{padding:22px}.stage{display:block}.stage-aside{padding:23px}.stage-aside h2{font-size:1.4rem}.stage-aside p{margin-bottom:0}.stage-links{padding:15px 23px}.prose{padding:25px 21px}.interview-feature{grid-template-columns:1fr;padding:25px;gap:20px}.interview-avatar{width:72px;font-size:1.7rem}.interview-feature h2{font-size:1.25rem}.platform-card{padding:25px}.event-form{grid-template-columns:1fr}.footer-top{grid-template-columns:1fr;gap:28px}.footer-links{grid-template-columns:repeat(3,1fr);gap:15px 10px}.footer-bottom{gap:15px}.qq-float{bottom:16px;right:16px;padding:11px 17px;font-size:.85rem}.contact-card{padding:25px}.button{padding:12px 18px}h2{font-size:1.6rem}}

/* Homepage: recent articles, one learning section and referral cards. */
.latest-entry-section{padding-top:36px}
.latest-entry{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 30px;background:#edf4ff;border:1px solid #cddff9;border-radius:15px;color:var(--ink)}
.latest-entry:hover{text-decoration:none;border-color:#91b9f7}
.latest-entry h2{margin:5px 0 6px;font-size:1.65rem}
.latest-entry p{margin:0;color:var(--muted);font-size:.95rem}
.latest-entry>.button{flex-shrink:0}
.learning-section{padding-top:42px}
.learning-topics{margin-top:32px;padding-top:26px;border-top:1px solid var(--line)}
.learning-topics-label{margin:0 0 18px;color:var(--muted);font-size:.95rem}
.referral-card{display:flex;flex-direction:column;min-width:0}
.referral-card-main{display:block;flex:1;color:var(--ink)}
.referral-card-main:hover{text-decoration:none}
.referral-card-main:hover h3{color:var(--blue)}
.referral-card .invite-code{gap:8px;padding:10px;font-size:.8rem}
.referral-card .invite-code>span{min-width:0}
.referral-card .invite-code code{font-size:.95rem;letter-spacing:.025em}
.referral-card .invite-code button{padding:8px 4px;flex-shrink:0}
.referral-card>.button{width:100%;padding:12px 10px;font-size:.85rem;gap:6px}
.referral-card .copy-result{display:block;overflow-wrap:anywhere}
.platform-note{margin:20px 0 0;color:var(--muted);font-size:.8rem}
.platform-symbol{flex-shrink:0}
.invitation-grid .invitation{min-width:0;display:flex;flex-direction:column}
.invitation-grid .invitation>.button{margin-top:auto}
.learning-section .route-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.platform-invites{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:1080px){.platform-invites{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.learning-section .route-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:767px){.invitation-grid{grid-template-columns:1fr}}
@media(max-width:600px){.latest-entry-section{padding-top:24px}.latest-entry{display:block;padding:22px}.latest-entry>.button{margin-top:18px;width:100%}.latest-entry h2{font-size:1.5rem}.learning-section{padding-top:34px}.learning-section .route-grid,.platform-invites{grid-template-columns:1fr}.learning-topics{margin-top:24px;padding-top:22px}.referral-card>.button{font-size:.95rem}.referral-card .invite-code{font-size:.875rem}}

/* Three recent article cards on the homepage. */
.latest-articles{margin-top:20px;grid-template-columns:repeat(3,minmax(0,1fr))}.latest-articles .article-card{min-width:0;overflow-wrap:anywhere}
@media(max-width:767px){.latest-articles{grid-template-columns:1fr}}
/* Shared language menu and long-label layout. */
.header-inner{gap:12px}.brand{margin-right:auto}.brand-mark{flex-shrink:0}
.language-switch{position:relative;flex-shrink:0;align-self:center;font-size:.85rem}
.language-switch>summary{display:flex;align-items:center;gap:7px;min-height:42px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;color:var(--ink);background:white;list-style:none;cursor:pointer;white-space:nowrap}
.language-switch>summary::-webkit-details-marker{display:none}
.language-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:168px;padding:7px;background:white;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 34px #152c5220;z-index:45}
.language-menu a{display:block;padding:11px 13px;color:var(--ink);border-radius:6px;white-space:nowrap}
.language-menu a:hover,.language-menu a[aria-current]{background:#edf4ff;color:var(--blue);text-decoration:none}
.language-badge{display:inline-block;flex-shrink:0;background:#f1f4f8;color:#60718a;font-size:.72rem;font-weight:500;line-height:1.6;padding:2px 7px;border-radius:4px;margin-left:6px;white-space:normal}
.translation-note{background:#edf4ff;color:#4b6485;border-radius:9px;padding:14px 18px;font-size:.875rem;line-height:1.7;margin:24px 0 0}
.invite-code{gap:10px;flex-wrap:wrap}.invite-code>span{min-width:0}.invite-code button{min-height:38px;padding:5px 7px;flex-shrink:0}.copy-result{overflow-wrap:anywhere}
.card-meta{flex-wrap:wrap}.article-card,.category-tile>div,.stage-aside,.stage-links{min-width:0}.article-card h3,.stage-links a,.category-tile h3,.invitation-title h3,.route-card h3{overflow-wrap:anywhere}
.read-link{flex-wrap:wrap;gap:6px;align-items:center}.hero-bottom{padding-inline:10px}
html[lang="en"] .hero h1,html[lang="es"] .hero h1{font-size:clamp(2.15rem,4.2vw,3.4rem);line-height:1.2;max-width:880px;margin-inline:auto}
html[lang="en"] .hero h1 span,html[lang="es"] .hero h1 span{display:inline-block}
html[lang="en"] .hero-checks,html[lang="es"] .hero-checks{flex-wrap:wrap;gap:12px 24px}
html[lang="en"] .invitation h3,html[lang="es"] .invitation h3{font-size:1.03rem;line-height:1.5}
html[lang="en"] #main-nav>a,html[lang="es"] #main-nav>a,html[lang="en"] .nav-dropdown>summary,html[lang="es"] .nav-dropdown>summary{padding:10px 7px}
@media(max-width:1180px){.site-header{height:70px}.menu-toggle{display:block;order:4}.language-switch{order:3}#main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:white;border-bottom:1px solid var(--line);padding:14px 20px;max-height:calc(100dvh - 70px);overflow-y:auto;box-shadow:0 15px 25px #1c335a12}#main-nav.open{display:grid;grid-template-columns:1fr 1fr}#main-nav>a,.nav-dropdown>summary{font-size:.95rem;padding:12px}.nav-dropdown{grid-column:1/-1}.nav-menu{position:static;width:auto;box-shadow:none;margin:0 0 10px;border:0;padding:0 6px}}
@media(max-width:767px){.latest-articles,.invitation-grid{grid-template-columns:1fr}.hero-checks{flex-wrap:wrap;gap:10px 16px}.language-menu{min-width:160px}.header-inner{width:calc(100% - 24px);gap:8px}.brand{font-size:1rem}.brand small{font-size:.51rem}.language-switch>summary{padding:9px}.menu-toggle{font-size:.8rem;padding:10px}.article-header h1{overflow-wrap:anywhere}.section-heading{flex-wrap:wrap}}
@media(max-width:400px){.brand{font-size:.88rem;gap:7px}.brand-mark{width:32px;height:32px;font-size:1.2rem}.brand small{font-size:.43rem;letter-spacing:.02em}.header-inner{gap:6px}.language-switch>summary{padding:8px 7px;gap:4px}.menu-toggle{padding:10px 7px;font-size:.75rem}.language-menu{right:-48px}.invitation{padding:20px}.hero h1{overflow-wrap:anywhere}.search-form{padding:16px}}

/* =====================================================================
   阶段 E/F（模块 3）：品牌首页、推广区块、文章页与视频机制
   配色：白 / 浅蓝 / 深蓝为主，少量比特币橙（--btc）。
   约束：不引入霓虹、复杂动画或新框架；只做必要的 hover/焦点过渡。
   ===================================================================== */
:root{--sky:#edf4ff;--sky-strong:#cfe0fa;--navy:#0f2b4d;--navy-soft:#1e3f6b;--btc:#f7931a;--btc-soft:#fff2df}
.eyebrow a{color:inherit;text-decoration:none}
.eyebrow a:hover{text-decoration:underline}

/* 区块 1：品牌定位与入口 */
.brand-hero{background:linear-gradient(160deg,#f7fbff 0%,#edf4ff 55%,#ffffff 100%);border-bottom:1px solid var(--line);padding-block:56px}
.brand-hero-inner{max-width:940px}
.brand-hero h1{font-size:clamp(2rem,4.2vw,3.1rem);color:var(--navy);overflow-wrap:anywhere}
.brand-hero h1 .accent{color:var(--blue)}
.brand-hero-desc{max-width:720px;margin:18px 0 20px;color:#4a5d78;font-size:1.06rem}
.brand-checks{display:flex;flex-wrap:wrap;gap:10px 24px;margin:12px 0 22px;color:#3f5877;font-size:.9rem}
.brand-checks b{color:#128169;margin-right:6px}
.brand-entry-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:28px 0 0;padding:0;list-style:none}
.brand-entry-list li{min-width:0}
.brand-entry-list a{display:block;height:100%;padding:18px;background:white;border:1px solid var(--line);border-radius:12px;color:var(--ink)}
.brand-entry-list a:hover{border-color:#91b9f7;text-decoration:none}
.brand-entry-list strong{display:block;color:var(--navy);font-size:1rem}
.brand-entry-list span{display:block;margin-top:6px;color:var(--muted);font-size:.85rem;overflow-wrap:anywhere}

/* 区块 2：平台与推广（桌面并排、移动上下） */
.promotion-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.promotion-card{display:flex;flex-direction:column;min-width:0;gap:16px;padding:28px;background:white;border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 30px #142d5208}
.promotion-head{display:flex;align-items:flex-start;gap:14px}
.promotion-head h3{margin:0;color:var(--navy);font-size:1.3rem}
.promotion-head p{margin:4px 0 0}
.promotion-intro{margin:0;color:#4a5d78;font-size:.95rem}
.promotion-block{padding-top:16px;border-top:1px solid var(--line);min-width:0}
.promotion-block h4{margin:0 0 12px;color:var(--navy);font-size:.95rem;letter-spacing:.04em}
.promotion-card .invite-code{display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between;background:var(--sky);border:1px solid var(--sky-strong);border-radius:10px;padding:12px 14px;margin-bottom:14px}
.promotion-card .invite-code code{font-size:1rem;letter-spacing:.03em;color:var(--navy)}
.promotion-card .actions{margin-top:0}
.promotion-url{margin:12px 0 0;overflow-wrap:anywhere}
.promotion-url code{background:#f4f7fc;padding:2px 6px;border-radius:5px;font-size:.78rem;overflow-wrap:anywhere}
.promotion-links{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:10px}
.promotion-links li{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline;justify-content:space-between;padding-bottom:9px;border-bottom:1px dashed var(--line);font-size:.9rem}
.promotion-links li span{color:var(--muted)}
.promotion-links li a{overflow-wrap:anywhere}
.verify-status{display:flex;gap:11px;align-items:flex-start;margin:0;padding:14px 16px;background:var(--btc-soft);border:1px solid #f4d9ae;border-left:4px solid var(--btc);border-radius:0 10px 10px 0;color:#7a5417;font-size:.85rem;line-height:1.75}
.verify-status code{background:#fff8ec;padding:1px 5px;border-radius:4px;overflow-wrap:anywhere}
.verify-status .status-dot{flex-shrink:0;width:10px;height:10px;margin-top:6px;border-radius:50%;background:var(--btc)}
.verify-status.is-verified{background:#eaf8f3;border-color:#a9dfcd;border-left-color:#128169;color:#14614d}
.brand-faq{margin-top:30px}
.brand-faq h3{margin:0 0 14px;color:var(--navy);font-size:1.1rem}
.brand-faq details{background:white;border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:10px}
.brand-faq summary{cursor:pointer;font-weight:600;color:var(--navy)}
.brand-faq summary::marker{color:var(--blue)}
.brand-faq p{margin:10px 0 0;color:var(--muted);font-size:.9rem}

/* 区块 3：四步新手路线 */
.brand-route .route-card{display:flex;flex-direction:column;min-width:0}
.brand-route .route-card .read-link{margin-top:auto;justify-content:flex-start;gap:8px;color:var(--blue)}

/* 区块 4/5：最新文章与热门教程 */
.brand-latest .article-card,.brand-hot .article-card{min-width:0;overflow-wrap:anywhere}
.card-thumb-link{display:block;margin:-6px 0 16px;border-radius:10px;overflow:hidden;background:var(--sky)}
.card-thumb{display:block;width:100%;height:170px;object-fit:cover}
.latest-source{margin:18px 0 0}
.latest-entry-actions{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0 0}
.hot-grid{margin-top:4px}
.brand-categories{margin-top:34px;padding-top:26px;border-top:1px solid var(--line)}
.brand-categories h3{margin:0 0 16px;color:var(--navy);font-size:1.05rem}
.category-chips{display:flex;flex-wrap:wrap;gap:9px;margin:0;padding:0;list-style:none}
.category-chips a{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;background:white;border:1px solid var(--line);border-radius:20px;color:#41567a;font-size:.875rem}
.category-chips a:hover{border-color:#91b9f7;background:var(--sky);text-decoration:none}
.chip-count{background:var(--sky);color:#5a7398;border-radius:10px;padding:1px 7px;font-size:.72rem}
.category-chips a:hover .chip-count{background:white}

/* 区块 6：已验收视频精选 */
.video-empty{text-align:left}
.video-empty p{margin:8px 0}
.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.video-card{margin:0;min-width:0;background:white;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;flex-direction:column;gap:12px}
.video-poster-button{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:190px;width:100%;padding:20px;border:1px solid var(--sky-strong);border-radius:11px;background-color:var(--sky);background-size:cover;background-position:center;color:var(--navy);cursor:pointer}
.video-play{display:grid;place-items:center;width:56px;height:56px;border-radius:50%;background:var(--blue);color:white;font-size:1.35rem;padding-left:4px}
.video-button-label{font-size:.9rem;font-weight:600}
.video-poster-button:focus-visible{outline:3px solid #20b5e5;outline-offset:3px}
.video-player video{display:block;width:100%;height:auto;border-radius:11px;background:#0d1b2e}
.video-caption{display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--muted)}

/* 文章页 */
.ly-article .reading{padding:40px 44px}
.article-header .eyebrow a{color:var(--blue)}
.featured-image{margin:6px 0 26px}
.featured-image img{display:block;width:100%;height:auto;border-radius:12px;background:var(--sky)}
.featured-image[data-fit="contain"] img{object-fit:contain;height:auto;max-height:none}
.featured-caption{margin-top:9px;color:var(--muted);font-size:.78rem;line-height:1.7}
.toc-inline{margin:0 0 26px;background:#f8fbff}
.toc ol{margin:0;padding-left:20px}
.toc li{margin:2px 0}
.toc-inline ol{columns:2;column-gap:26px}
.toc-inline a{display:block;padding:6px 0;border-bottom:1px solid #f0f3f8;color:#5a7089}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px 10px;margin:0;padding:0}
.breadcrumb li+li:before{content:"/";margin-right:10px;color:#c3ccd9}
.article-sources{margin:34px 0 0;padding:22px 24px;background:#f8fbff;border:1px solid var(--line);border-radius:12px}
.article-sources h2{margin:0 0 12px;font-size:1.1rem;color:var(--navy)}
.article-sources ul{margin:0;padding-left:20px}
.article-sources li{margin:7px 0;font-size:.9rem;overflow-wrap:anywhere}
.article-end{margin-top:32px}
.related-reading{margin:44px 0 0;padding-top:30px;border-top:1px solid var(--line)}
.related-reading h2{font-size:1.35rem;color:var(--navy);margin-bottom:20px}
.related-grid{margin-top:4px}
.reading-sidebar .sidebar-note{margin-top:18px;line-height:1.75}
.reading-sidebar .toc ol{margin:0;padding-left:18px}
.reading-sidebar .toc a{display:block;padding:7px 0;border-bottom:1px solid #f0f3f8;color:#6c7b91;font-size:.85rem}
/* display_fit=contain 的正文图：完整显示，不裁断文字与二维码 */
.ly-body img{max-width:100%;height:auto}
.ly-media-g029,.ly-media-c-141,.toc-contain img{object-fit:contain}
[data-contain-selector]{--ly-contain:1}

/* 断点：1080 / 900 / 767 / 600 / 400 */
@media(max-width:1080px){
.promotion-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.brand-entry-list{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:900px){
.brand-route .route-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.video-grid{grid-template-columns:1fr}
.toc-inline ol{columns:1}
}
@media(max-width:767px){
.promotion-grid{grid-template-columns:1fr}
.brand-latest .latest-articles{grid-template-columns:1fr}
.brand-hot .hot-grid,.related-grid{grid-template-columns:1fr}
.brand-hero{padding-block:40px}
.brand-entry-list{gap:12px}
}
@media(max-width:600px){
.brand-entry-list{grid-template-columns:1fr}
.ly-article .reading{padding:26px 20px}
.brand-hero h1{font-size:1.9rem}
.category-chips a{padding:8px 11px;font-size:.82rem}
}
@media(max-width:400px){
.brand-hero h1{font-size:1.7rem;overflow-wrap:anywhere}
.promotion-card{padding:20px}
.promotion-links li{justify-content:flex-start}
}