.top-bar {
    display: none;
}

.fab-root {
    display: none;
}

#read-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--blue) 0%, #7DDFB4 100%);
    z-index: 9999;
    transition: width 0.08s linear;
    border-radius: 0 2px 2px 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    padding: 28px 0 0;
    flex-wrap: nowrap;
    overflow: hidden;
    width: 100%;
}

.breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.18s;
    flex-shrink: 0;
}

.breadcrumbs a:hover { color: var(--blue); }

.breadcrumbs svg {
    width: 13px; height: 13px;
    opacity: 0.4;
    flex-shrink: 0;
}

.bc-current {
    color: var(--navy);
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex-shrink: 1;
    min-width: 0;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 52px;
    align-items: start;
    padding: 36px 0 88px;
}

.article-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    border-radius: 100px;
    padding: 5px 14px 5px 10px;
    margin-bottom: 18px;
}

.badge-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.article-title {
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: clamp(1.8rem, 3.5vw, 2.65rem);
    font-weight: 900;
    color: var(--navy);
    line-height: 1.1;
    letter-spacing: -0.038em;
    margin-bottom: 0;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
    padding: 18px 0;
    border-top: 1.5px solid var(--border);
    border-bottom: 1.5px solid var(--border);
    margin: 22px 0 32px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.meta-item svg {
    width: 14px; height: 14px;
    color: var(--blue);
    flex-shrink: 0;
}

.meta-author-ico {
    width: 28px; height: 28px;
    background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 0.58rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.meta-divider {
    width: 1px; height: 18px;
    background: var(--border);
    flex-shrink: 0;
}

.article-hero-img {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 36px;
    aspect-ratio: 16 / 7;
    background: linear-gradient(135deg, var(--navy) 0%, var(--blue-dark) 100%);
}

.article-hero-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.article-hero-img:hover img { transform: scale(1.025); }

.article-content {
    font-family: 'Manrope', sans-serif;
    font-size: 1.01rem;
    line-height: 1.82;
    color: var(--text-main);
}

.article-content > p:first-child {
    font-size: 1.08rem;
    font-weight: 600;
    color: var(--navy);
    line-height: 1.75;
}

.article-content h2 {
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--navy);
    letter-spacing: -0.025em;
    margin: 44px 0 16px;
    line-height: 1.22;
}

.article-content h3 {
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -0.018em;
    margin: 34px 0 12px;
}

.article-content h4 {
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--navy);
    margin: 26px 0 8px;
}

.article-content p { margin-bottom: 20px; }
.article-content p:last-child { margin-bottom: 0; }

.article-content ul,
.article-content ol {
    margin: 0 0 22px;
    padding-left: 28px;
}

.article-content li { margin-bottom: 8px; }

.article-content a {
    color: var(--blue);
    text-decoration: underline;
    text-decoration-color: rgba(30,91,255,0.28);
    text-underline-offset: 3px;
    font-weight: 600;
    transition: text-decoration-color 0.18s;
}

.article-content a:hover { text-decoration-color: var(--blue); }

.article-content blockquote {
    margin: 30px 0;
    padding: 22px 26px;
    border-left: 4px solid var(--blue);
    background: linear-gradient(to right, rgba(30,91,255,0.05), transparent);
    border-radius: 0 14px 14px 0;
    font-style: italic;
    color: var(--navy);
    font-weight: 600;
    font-size: 1.05rem;
    line-height: 1.65;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 26px 0;
    font-size: 0.9rem;
    border-radius: 14px;
    overflow: hidden;
    border: 1.5px solid var(--border);
}

.article-content th {
    background: var(--navy);
    color: #fff;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 13px 16px;
    text-align: left;
}

.article-content td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-main);
}

.article-content tr:nth-child(even) td { background: var(--bg); }
.article-content tr:last-child td { border-bottom: none; }

.article-content img {
    max-width: 100%;
    border-radius: 14px;
    margin: 18px 0;
    display: block;
}

.article-content strong { color: var(--navy); font-weight: 700; }

.article-content code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.87em;
    background: rgba(30,91,255,0.07);
    color: var(--blue-dark);
    padding: 2px 7px;
    border-radius: 5px;
}

.article-content pre {
    background: var(--navy);
    color: #e8f0ff;
    border-radius: 14px;
    padding: 22px 24px;
    overflow-x: auto;
    margin: 24px 0;
    font-size: 0.88rem;
    line-height: 1.65;
}

.article-content pre code { background: none; color: inherit; padding: 0; }

.article-updated {
    display: flex;
    align-items: center;
    gap: 9px;
    background: rgba(30,91,255,0.05);
    border: 1px solid rgba(30,91,255,0.14);
    border-radius: 10px;
    padding: 11px 16px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 22px;
}

.article-updated svg {
    width: 14px; height: 14px;
    color: var(--blue);
    flex-shrink: 0;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 48px;
    padding-top: 28px;
    border-top: 1.5px solid var(--border);
}

.article-tags-label {
    font-family: 'Manrope', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.09em;
    width: 100%;
    margin-bottom: 4px;
}

.article-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 13px;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: 100px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: all 0.18s;
    cursor: default;
}

.article-tag::before { content: '#'; opacity: 0.45; margin-right: 1px; }

.article-tag:hover {
    border-color: var(--blue);
    color: var(--blue);
    background: rgba(30,91,255,0.05);
}

.article-share {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 32px;
    padding-top: 26px;
    border-top: 1.5px solid var(--border);
    flex-wrap: wrap;
}

.share-label {
    font-family: 'Manrope', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-right: 4px;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 15px;
    border: 1.5px solid var(--border);
    border-radius: 100px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.77rem;
    font-weight: 700;
    color: var(--text-main);
    background: var(--bg);
    cursor: pointer;
    transition: all 0.18s;
    text-decoration: none;
}

.share-btn svg { width: 14px; height: 14px; flex-shrink: 0; }

.share-btn:hover {
    border-color: var(--blue);
    color: var(--blue);
    background: rgba(30,91,255,0.05);
    transform: translateY(-1px);
}

.share-btn:active { transform: translateY(0); }
.copy-btn { margin-left: auto; }

.faq-section { margin-top: 56px; }

.faq-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--navy);
    letter-spacing: -0.025em;
    margin-bottom: 18px;
}

.faq-heading-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.faq-heading-icon svg { width: 18px; height: 18px; color: #fff; }

.faq-list { display: flex; flex-direction: column; gap: 6px; }

.faq-item {
    border: 1.5px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item:hover { border-color: rgba(30,91,255,0.28); }

.faq-item.open {
    border-color: rgba(30,91,255,0.38);
    box-shadow: 0 4px 18px rgba(30,91,255,0.08);
}

.faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 20px;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--navy);
    cursor: pointer;
    user-select: none;
    line-height: 1.4;
}

.faq-chevron {
    width: 30px; height: 30px;
    border-radius: 8px;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.22s;
}

.faq-chevron svg {
    width: 14px; height: 14px;
    color: var(--blue);
    transition: transform 0.25s;
}

.faq-item.open .faq-chevron {
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
}

.faq-item.open .faq-chevron svg {
    color: #fff;
    transform: rotate(180deg);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    font-family: 'Manrope', sans-serif;
    font-size: 0.88rem;
    line-height: 1.72;
    color: var(--text-muted);
    border-top: 0px solid var(--border);
    padding: 0 20px;
    transition: max-height 0.32s ease, padding 0.22s ease, border-top-width 0.2s;
}

.faq-item.open .faq-a {
    max-height: 800px;
    padding: 14px 20px 20px;
    border-top-width: 1px;
}

.article-sidebar {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.back-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 13px 18px;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: 14px;
    text-decoration: none;
    font-family: 'Manrope', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: all 0.18s;
}

.back-card:hover {
    border-color: var(--blue);
    color: var(--blue);
    background: rgba(30,91,255,0.04);
    transform: translateX(-2px);
}

.back-card svg { width: 15px; height: 15px; flex-shrink: 0; }

.takeaways-card {
    background: var(--navy);
    border-radius: 20px;
    padding: 26px;
    position: relative;
    overflow: hidden;
}

.takeaways-card::before {
    content: '';
    position: absolute;
    right: -55px; top: -55px;
    width: 220px; height: 220px;
    background: rgba(30,91,255,0.28);
    border-radius: 50%;
    pointer-events: none;
}

.takeaways-card::after {
    content: '';
    position: absolute;
    left: -30px; bottom: -40px;
    width: 130px; height: 130px;
    background: rgba(95,139,255,0.12);
    border-radius: 50%;
    pointer-events: none;
}

.takeaways-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.takeaways-label::before {
    content: '';
    width: 6px; height: 6px;
    background: #7DDFB4;
    border-radius: 50%;
    animation: pulse 2.2s ease-in-out infinite;
}

@keyframes pulse {
    0%,100% { opacity:1; transform:scale(1); }
    50%      { opacity:0.5; transform:scale(0.8); }
}

.takeaways-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    z-index: 1;
}

.takeaways-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.84rem;
    font-weight: 600;
    color: rgba(255,255,255,0.85);
    line-height: 1.52;
}

.tw-check {
    width: 18px; height: 18px;
    border-radius: 50%;
    background: rgba(125,223,180,0.15);
    border: 1.5px solid rgba(125,223,180,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.tw-check svg { width: 9px; height: 9px; color: #7DDFB4; }

.toc-card {
    background: var(--white);
    border: 1.5px solid var(--border);
    border-radius: 18px;
    padding: 20px;
}

.toc-card-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Outfit', 'Manrope', sans-serif;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.toc-card-label svg { width: 13px; height: 13px; color: var(--blue); }

.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.toc-list li a {
    display: block;
    padding: 7px 10px;
    border-radius: 8px;
    font-family: 'Manrope', sans-serif;
    font-size: 0.79rem;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.18s;
    line-height: 1.4;
    border-left: 2px solid transparent;
}

.toc-list li a:hover { color: var(--navy); background: var(--bg); }

.toc-list li.active a {
    color: var(--blue);
    background: rgba(30,91,255,0.05);
    border-left-color: var(--blue);
    font-weight: 700;
}

.toc-list li.toc-h3 a { padding-left: 22px; font-size: 0.75rem; }

#back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--navy);
    color: #fff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 6px 24px rgba(8,30,82,0.22);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.25s, transform 0.25s, background 0.18s, box-shadow 0.18s;
    z-index: 500;
}

#back-to-top.show { opacity: 1; transform: translateY(0); }

#back-to-top:hover {
    background: var(--blue);
    box-shadow: 0 8px 28px rgba(30,91,255,0.32);
}

#back-to-top svg { width: 18px; height: 18px; }

.fade-up {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-up.visible { opacity: 1; transform: translateY(0); }

@media (min-width: 1600px) {
    .container {
    max-width: 1440px;
    padding: 0 48px;
    }

    .article-layout {
    grid-template-columns: 1fr 380px;
    gap: 72px;
    padding: 40px 0 100px;
    }

    .article-title {
    font-size: 3rem;
    }

    .article-content {
    font-size: 1.06rem;
    line-height: 1.88;
    }

    .article-content h2 {
    font-size: 1.65rem;
    margin: 52px 0 18px;
    }

    .article-content h3 {
    font-size: 1.25rem;
    margin: 38px 0 14px;
    }

    .article-sidebar {
    top: calc(var(--header-h) + 32px);
    }

    .takeaways-card {
    padding: 30px;
    }
}

@media (max-width: 1280px) {
    .container {
    max-width: 1100px;
    padding: 0 32px;
    }

    .article-layout {
    grid-template-columns: 1fr 310px;
    gap: 44px;
    }
}

@media (max-width: 1100px) {
    .container {
    padding: 0 24px;
    }

    .article-layout {
    grid-template-columns: 1fr 288px;
    gap: 32px;
    padding: 28px 0 72px;
    }

    .article-title {
    font-size: clamp(1.75rem, 3.5vw, 2.4rem);
    }

    .article-content {
    font-size: 0.98rem;
    line-height: 1.78;
    }

    .article-content h2 {
    font-size: 1.35rem;
    margin: 38px 0 14px;
    }

    .article-content h3 {
    font-size: 1.08rem;
    margin: 28px 0 11px;
    }

    .takeaways-card {
    padding: 22px;
    }

    .takeaways-list li {
    font-size: 0.82rem;
    }

    .toc-card {
    padding: 16px;
    }

    .toc-list li a {
    font-size: 0.76rem;
    padding: 6px 9px;
    }

    .article-sidebar {
    top: calc(var(--header-h) + 20px);
    gap: 14px;
    }
}

@media (max-width: 960px) {
    .article-layout {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 24px 0 64px;
    align-items: stretch;
    }

    .article-main, 
    .article-sidebar {
    display: contents;
    }
    
    .article-type-badge { order: 1; }
    .article-title      { order: 2; }
    .article-meta       { order: 3; }
    
    .takeaways-card { 
    order: 4; 
    margin-bottom: 24px;
    width: 100%;
    }

    .article-hero-img  { order: 5; }
    .article-content   { order: 6; }
    .article-updated   { order: 7; }
    .article-tags      { order: 8; }
    .article-share     { order: 9; }
    .faq-section       { order: 10; }

    .article-type-badge {
    align-self: flex-start;
    width: auto;
    }

    .back-card { 
    order: 11; 
    margin-top: 32px;
    width: 100%;
    justify-content: center;
    }

    .toc-card {
    display: none !important;
    }


    .breadcrumbs {
    padding-top: 22px;
    }

    .article-title {
    font-size: clamp(1.65rem, 4vw, 2.2rem);
    }

    .article-hero-img {
    aspect-ratio: 16 / 6;
    border-radius: 16px;
    margin-bottom: 28px;
    }

    .article-content {
    font-size: 0.97rem;
    }

    .article-content h2 {
    font-size: 1.3rem;
    margin: 34px 0 13px;
    }

    .article-content h3 {
    font-size: 1.06rem;
    margin: 26px 0 10px;
    }

    .article-meta {
    gap: 14px;
    padding: 15px 0;
    margin: 18px 0 26px;
    }

    .faq-section {
    margin-top: 44px;
    }

    .faq-q {
    font-size: 0.91rem;
    padding: 16px 18px;
    }
}

@media (max-width: 768px) {
    .container {
    padding: 0 20px;
    }

    .breadcrumbs {
    font-size: 0.75rem;
    gap: 6px;
    padding-top: 18px;
    }

    .bc-current {
    max-width: 260px;
    }

    .article-layout {
    padding: 20px 0 56px;
    }

    .article-sidebar {
    gap: 12px;
    padding-bottom: 26px;
    }

    .takeaways-card {
    max-width: 100%;
    flex: 1 1 100%;
    padding: 20px 22px;
    }

    .takeaways-label {
    font-size: 0.65rem;
    margin-bottom: 13px;
    }

    .takeaways-list {
    gap: 10px;
    }

    .takeaways-list li {
    font-size: 0.81rem;
    line-height: 1.48;
    }

    .tw-check {
    width: 16px;
    height: 16px;
    }

    .tw-check svg {
    width: 8px;
    height: 8px;
    }

    .back-card {
    padding: 11px 16px;
    font-size: 0.79rem;
    border-radius: 12px;
    }

    .article-type-badge {
    font-size: 0.65rem;
    padding: 4px 12px 4px 9px;
    margin-bottom: 14px;
    }

    .article-title {
    font-size: clamp(1.5rem, 5vw, 2rem);
    letter-spacing: -0.03em;
    }

    .article-meta {
    gap: 10px;
    padding: 13px 0;
    margin: 16px 0 22px;
    flex-wrap: wrap;
    }

    .meta-item {
    font-size: 0.76rem;
    gap: 6px;
    }

    .meta-item svg {
    width: 13px;
    height: 13px;
    }

    .meta-author-ico {
    width: 26px;
    height: 26px;
    font-size: 0.55rem;
    }

    .meta-divider:not(:first-of-type) {
    display: none;
    }

    .article-hero-img {
    aspect-ratio: 16 / 7;
    border-radius: 14px;
    margin-bottom: 24px;
    }

    .article-content {
    font-size: 0.95rem;
    line-height: 1.76;
    }

    .article-content > p:first-child {
    font-size: 1rem;
    }

    .article-content h2 {
    font-size: 1.22rem;
    margin: 30px 0 11px;
    }

    .article-content h3 {
    font-size: 1rem;
    margin: 24px 0 9px;
    }

    .article-content h4 {
    font-size: 0.94rem;
    margin: 20px 0 7px;
    }

    .article-content ul,
    .article-content ol {
    padding-left: 22px;
    margin: 0 0 18px;
    }

    .article-content li {
    margin-bottom: 7px;
    }

    .article-content blockquote {
    padding: 16px 20px;
    margin: 24px 0;
    font-size: 0.97rem;
    }

    .article-content table {
    font-size: 0.84rem;
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    }

    .article-content th,
    .article-content td {
    padding: 9px 13px;
    white-space: nowrap;
    }

    .article-tags {
    margin-top: 36px;
    padding-top: 22px;
    gap: 7px;
    }

    .article-tag {
    font-size: 0.72rem;
    padding: 5px 11px;
    }

    .article-share {
    gap: 7px;
    margin-top: 26px;
    padding-top: 22px;
    }

    .share-label {
    font-size: 0.72rem;
    }

    .share-btn {
    font-size: 0.73rem;
    padding: 7px 13px;
    gap: 6px;
    }

    .share-btn svg {
    width: 13px;
    height: 13px;
    }

    .copy-btn {
    margin-left: 0;
    }

    .faq-section {
    margin-top: 36px;
    }

    .faq-heading {
    font-size: 1.15rem;
    gap: 10px;
    margin-bottom: 14px;
    }

    .faq-heading-icon {
    width: 32px;
    height: 32px;
    border-radius: 9px;
    }

    .faq-heading-icon svg {
    width: 16px;
    height: 16px;
    }

    .faq-list {
    gap: 5px;
    }

    .faq-item {
    border-radius: 12px;
    }

    .faq-q {
    font-size: 0.88rem;
    padding: 15px 16px;
    gap: 12px;
    }

    .faq-chevron {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    flex-shrink: 0;
    }

    .faq-chevron svg {
    width: 12px;
    height: 12px;
    }

    .faq-item.open .faq-a {
    padding: 12px 16px 16px;
    font-size: 0.85rem;
    }

    .article-updated {
    font-size: 0.75rem;
    padding: 10px 14px;
    border-radius: 9px;
    margin-top: 18px;
    }

    #back-to-top {
    bottom: 24px;
    right: 24px;
    width: 42px;
    height: 42px;
    }

    #back-to-top svg {
    width: 17px;
    height: 17px;
    }
}

@media (max-width: 640px) {
    .container {
    padding: 0 16px;
    }

    .breadcrumbs {
    padding-top: 14px;
    font-size: 0.72rem;
    gap: 5px;
    }

    .breadcrumbs svg {
    width: 11px;
    height: 11px;
    }

    .bc-current {
    max-width: 200px;
    font-size: 0.7rem;
    }

    .article-layout {
    padding: 16px 0 48px;
    }

    .article-sidebar {
    padding-bottom: 22px;
    }

    .article-title {
    font-size: 1.5rem;
    line-height: 1.12;
    letter-spacing: -0.028em;
    }

    .article-meta {
    gap: 8px;
    margin: 13px 0 18px;
    }

    .meta-divider {
    display: none;
    }

    .meta-item {
    font-size: 0.74rem;
    }

    .article-hero-img {
    aspect-ratio: 16 / 8;
    border-radius: 12px;
    margin-bottom: 20px;
    }

    .article-content {
    font-size: 0.93rem;
    line-height: 1.74;
    }

    .article-content > p:first-child {
    font-size: 0.96rem;
    }

    .article-content h2 {
    font-size: 1.15rem;
    margin: 28px 0 10px;
    }

    .article-content h3 {
    font-size: 0.96rem;
    margin: 22px 0 9px;
    }

    .article-content blockquote {
    padding: 14px 16px;
    margin: 20px 0;
    font-size: 0.92rem;
    border-radius: 0 10px 10px 0;
    }

    .article-content pre {
    padding: 16px 18px;
    font-size: 0.82rem;
    border-radius: 10px;
    }

    .article-share {
    flex-wrap: wrap;
    gap: 7px;
    }

    .share-label {
    width: 100%;
    margin-bottom: 2px;
    }

    .share-btn {
    flex: 1 1 auto;
    justify-content: center;
    font-size: 0.72rem;
    padding: 8px 10px;
    border-radius: 8px;
    }

    .copy-btn {
    flex: 1 1 100%;
    justify-content: center;
    }

    .faq-q {
    font-size: 0.85rem;
    padding: 13px 14px;
    }

    .faq-item.open .faq-a {
    font-size: 0.83rem;
    padding: 11px 14px 15px;
    }

    #back-to-top {
    bottom: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    }
}

@media (max-width: 480px) {
    .container {
    padding: 0 14px;
    }

    .breadcrumbs {
    row-gap: 4px;
    }

    .bc-current {
    max-width: 100%;
    white-space: normal;
    display: -webkit-box;
    line-clamp: 1;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    }

    .article-layout {
    padding: 14px 0 44px;
    }

    .article-sidebar {
    padding-bottom: 20px;
    gap: 10px;
    }

    .back-card {
    padding: 10px 14px;
    font-size: 0.77rem;
    border-radius: 11px;
    gap: 8px;
    }

    .back-card svg {
    width: 14px;
    height: 14px;
    }

    .takeaways-card {
    padding: 18px;
    border-radius: 16px;
    }

    .takeaways-card::before {
    width: 160px;
    height: 160px;
    right: -45px;
    top: -45px;
    }

    .takeaways-label {
    font-size: 0.62rem;
    margin-bottom: 12px;
    }

    .takeaways-list {
    gap: 9px;
    }

    .takeaways-list li {
    font-size: 0.78rem;
    gap: 9px;
    line-height: 1.46;
    }

    .article-type-badge {
    font-size: 0.62rem;
    padding: 4px 11px 4px 8px;
    gap: 6px;
    margin-bottom: 12px;
    }

    .badge-dot {
    width: 5px;
    height: 5px;
    }

    .article-title {
    font-size: 1.38rem;
    line-height: 1.13;
    }

    .article-meta {
    flex-wrap: wrap;
    gap: 8px 12px;
    padding: 12px 0;
    margin: 12px 0 16px;
    }

    .article-hero-img {
    aspect-ratio: 4 / 3;
    border-radius: 12px;
    margin-bottom: 18px;
    }

    .article-content {
    font-size: 0.91rem;
    line-height: 1.72;
    }

    .article-content > p:first-child {
    font-size: 0.94rem;
    font-weight: 600;
    }

    .article-content h2 {
    font-size: 1.1rem;
    margin: 26px 0 9px;
    }

    .article-content h3 {
    font-size: 0.94rem;
    margin: 20px 0 8px;
    }

    .article-content h4 {
    font-size: 0.88rem;
    margin: 16px 0 6px;
    }

    .article-content p {
    margin-bottom: 16px;
    }

    .article-content ul,
    .article-content ol {
    padding-left: 18px;
    margin: 0 0 16px;
    }

    .article-content li {
    margin-bottom: 6px;
    font-size: 0.91rem;
    }

    .article-content blockquote {
    padding: 12px 16px;
    margin: 18px 0;
    font-size: 0.88rem;
    border-left-width: 3px;
    }

    .article-content table {
    font-size: 0.8rem;
    }

    .article-content th,
    .article-content td {
    padding: 8px 10px;
    }

    .article-content th {
    font-size: 0.72rem;
    }

    .article-content pre {
    padding: 14px 16px;
    font-size: 0.8rem;
    border-radius: 10px;
    }

    .article-updated {
    font-size: 0.73rem;
    padding: 9px 13px;
    gap: 7px;
    border-radius: 8px;
    }

    .article-updated svg {
    width: 13px;
    height: 13px;
    }

    .article-tags {
    margin-top: 30px;
    padding-top: 18px;
    gap: 6px;
    }

    .article-tags-label {
    font-size: 0.65rem;
    margin-bottom: 2px;
    }

    .article-tag {
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 100px;
    }

    .article-share {
    margin-top: 22px;
    padding-top: 18px;
    gap: 6px;
    }

    .share-label {
    font-size: 0.7rem;
    width: 100%;
    }

    .share-btn {
    font-size: 0.7rem;
    padding: 7px 9px;
    border-radius: 8px;
    }

    .faq-section {
    margin-top: 30px;
    }

    .faq-heading {
    font-size: 1.05rem;
    gap: 9px;
    margin-bottom: 12px;
    }

    .faq-heading-icon {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    }

    .faq-heading-icon svg {
    width: 15px;
    height: 15px;
    }

    .faq-item {
    border-radius: 11px;
    }

    .faq-q {
    font-size: 0.83rem;
    padding: 12px 14px;
    gap: 10px;
    line-height: 1.38;
    }

    .faq-chevron {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    }

    .faq-a {
    font-size: 0.82rem;
    }

    .faq-item.open .faq-a {
    padding: 10px 14px 14px;
    }

    #read-progress {
    height: 3px;
    }

    #back-to-top {
    bottom: 16px;
    right: 16px;
    width: 38px;
    height: 38px;
    box-shadow: 0 4px 16px rgba(8,30,82,0.2);
    }

    #back-to-top svg {
    width: 16px;
    height: 16px;
    }
}

@media (max-width: 375px) {
    .container {
    padding: 0 12px;
    }

    .breadcrumbs {
    padding-top: 12px;
    font-size: 0.68rem;
    }

    .article-title {
    font-size: 1.25rem;
    }

    .article-type-badge {
    font-size: 0.58rem;
    padding: 3px 10px 3px 7px;
    margin-bottom: 10px;
    }

    .meta-item {
    font-size: 0.7rem;
    gap: 5px;
    }

    .meta-author-ico {
    width: 24px;
    height: 24px;
    font-size: 0.5rem;
    }

    .article-content {
    font-size: 0.88rem;
    }

    .article-content > p:first-child {
    font-size: 0.91rem;
    }

    .article-content h2 {
    font-size: 1.04rem;
    }

    .article-content h3 {
    font-size: 0.9rem;
    }

    .takeaways-card {
    padding: 16px;
    border-radius: 14px;
    }

    .takeaways-list li {
    font-size: 0.75rem;
    }

    .faq-q {
    font-size: 0.8rem;
    padding: 11px 12px;
    }

    .faq-item.open .faq-a {
    font-size: 0.79rem;
    padding: 9px 12px 13px;
    }

    .share-btn {
    font-size: 0.68rem;
    padding: 6px 8px;
    }

    .article-tag {
    font-size: 0.67rem;
    padding: 3px 9px;
    }

    #back-to-top {
    width: 36px;
    height: 36px;
    bottom: 14px;
    right: 14px;
    }

    .meta-item-reading-min {
        display: none !important;
    }
}