/* ============================================================
   Article Page — Common Styles
   Covers: layout, breadcrumb, article header, body, code,
   callouts, sidebar TOC, product-recommend, float-widget,
   inline CTA, and responsive breakpoints.
   DO NOT re-declare any of these styles in individual article HTML files.
   ============================================================ */

/* === Article Page Wrapper === */
/* padding-top must clear the sticky nav (~68px) plus visual breathing room */
.article-page-wrap {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 52px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 108px 32px 128px;
    align-items: start;
}

/* Grid children must have min-width: 0 to prevent content from overflowing the grid cell */
.article-main {
    min-width: 0;
    overflow-x: hidden;
}

/* === Breadcrumb === */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-grey-light);
    margin-bottom: 36px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--color-grey-light);
    transition: var(--transition);
}
.breadcrumb a:hover {
    color: var(--color-brand);
}
.breadcrumb-sep {
    color: var(--color-grey-light);
    opacity: 0.45;
}
.breadcrumb-current {
    color: var(--color-grey-dark);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 280px;
}

/* === Article Header (injected by article-recommend.js) === */
.article-header {
    margin-bottom: 48px;
    padding-bottom: 40px;
    border-bottom: 1.5px solid var(--color-border);
}
.article-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.article-tag {
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.article-tag-featured  { background: rgba(99,102,241,0.12);  color: var(--color-brand);  border: 1px solid rgba(99,102,241,0.25); }
.article-tag-latest    { background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand)); color: #fff; border: none; }
.article-tag-update    { background: rgba(245,158,11,0.12);  color: #d97706; border: 1px solid rgba(245,158,11,0.25); }
.article-tag-tutorial  { background: rgba(16,185,129,0.12);  color: #059669; border: 1px solid rgba(16,185,129,0.25); }
.article-tag-guide     { background: rgba(59,130,246,0.12);  color: #2563eb; border: 1px solid rgba(59,130,246,0.25); }
.article-tag-tips      { background: rgba(236,72,153,0.12);  color: #db2777; border: 1px solid rgba(236,72,153,0.25); }
.article-tag-compare   { background: rgba(168,85,247,0.12);  color: #7c3aed; border: 1px solid rgba(168,85,247,0.25); }

.article-header h1 {
    font-size: 2.4rem;
    letter-spacing: -0.04em;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--color-black);
}
.article-header-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 0.88rem;
    color: var(--color-grey-light);
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.article-header-meta i {
    margin-right: 5px;
    color: var(--color-brand);
}
.article-summary {
    font-size: 1.02rem;
    color: var(--color-grey-dark);
    line-height: 1.8;
    background: var(--color-bg-light);
    border-left: 4px solid var(--color-brand);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin: 0;
}

/* === Article Body === */
.article-body {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-grey-dark);
    overflow-wrap: break-word;
    word-break: break-word;
}
.article-body h2 {
    font-size: 1.6rem;
    letter-spacing: -0.03em;
    margin: 56px 0 20px;
    color: var(--color-black);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-border);
}
.article-body h3 {
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    margin: 32px 0 14px;
    color: var(--color-black);
}
.article-body p {
    margin-bottom: 20px;
}
.article-body ul,
.article-body ol {
    list-style: none;
    margin: 0 0 20px 0;
    padding: 0;
}
.article-body ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}
.article-body ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 11px;
    width: 6px;
    height: 6px;
    background: var(--color-brand);
    border-radius: 50%;
}
.article-body ol {
    counter-reset: ol-counter;
}
.article-body ol li {
    counter-increment: ol-counter;
    position: relative;
    padding-left: 32px;
    margin-bottom: 10px;
}
.article-body ol li::before {
    content: counter(ol-counter);
    position: absolute;
    left: 0;
    top: 3px;
    width: 20px;
    height: 20px;
    background: var(--color-brand-bg);
    color: var(--color-brand);
    border-radius: 50%;
    font-size: 0.74rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.article-body a {
    color: var(--color-brand);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-body a:hover { color: var(--color-brand-dark); }

/* Code blocks */
.article-body pre {
    background: #0f0e24;
    border-radius: 12px;
    padding: 24px;
    overflow-x: auto;
    margin: 28px 0;
    border: 1px solid rgba(255,255,255,0.07);
}
.article-body code {
    font-family: 'Menlo', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    color: #e2e8f0;
    line-height: 1.75;
}
.article-body :not(pre) > code {
    background: rgba(99,102,241,0.1);
    color: var(--color-brand);
    padding: 2px 7px;
    border-radius: 5px;
    font-size: 0.88em;
}

/* Callout / tip boxes */
.callout {
    background: rgba(99,102,241,0.07);
    border: 1px solid rgba(99,102,241,0.2);
    border-left: 4px solid var(--color-brand);
    border-radius: 0 10px 10px 0;
    padding: 16px 20px;
    margin: 28px 0;
    font-size: 0.95rem;
    line-height: 1.7;
}
.callout-warn {
    background: rgba(245,158,11,0.07);
    border-color: rgba(245,158,11,0.2);
    border-left-color: #f59e0b;
}
.callout-warn .callout-icon { color: #f59e0b; }
.callout-success {
    background: rgba(16,185,129,0.07);
    border-color: rgba(16,185,129,0.2);
    border-left-color: #10b981;
}
.callout-success .callout-icon { color: #10b981; }
.callout-icon {
    font-weight: 700;
    color: var(--color-brand);
    margin-right: 6px;
}

/* Inline article CTA block */
.article-cta {
    background: linear-gradient(135deg, #0f0e24 0%, #1b1650 60%, #0e2448 100%);
    border-radius: 20px;
    padding: 44px 40px;
    text-align: center;
    margin: 44px 0;
    border: 1px solid rgba(255,255,255,0.05);
}
.article-cta h3 {
    color: #fff;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}
.article-cta p {
    color: rgba(255,255,255,0.55);
    font-size: 0.95rem;
    margin-bottom: 24px;
    line-height: 1.7;
}
.btn-article-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 32px;
    background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: var(--shadow-brand);
}
.btn-article-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(99,102,241,0.45);
    color: #fff;
    text-decoration: none;
}

/* === Product Recommend Section (injected after article body) === */
.product-recommend {
    background: linear-gradient(135deg, #0f0e24 0%, #1a1450 60%, #0e2448 100%);
    border-radius: 28px;
    padding: 60px 56px;
    margin-top: 80px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.04);
}
.product-recommend-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99,102,241,0.15);
    color: #a5b4fc;
    border: 1px solid rgba(99,102,241,0.3);
    border-radius: 50px;
    padding: 6px 18px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 24px;
}
.product-recommend h2 {
    color: #fff;
    font-size: 2rem;
    letter-spacing: -0.04em;
    line-height: 1.2;
    margin-bottom: 16px;
    border-bottom: none;
    padding-bottom: 0;
    margin-top: 0;
}
.product-recommend > p {
    color: rgba(255,255,255,0.55);
    font-size: 1rem;
    line-height: 1.75;
    max-width: 540px;
    margin: 0 auto 40px;
}
.product-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 44px;
    text-align: left;
}
.product-feature-item {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 14px;
    padding: 18px 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.product-feature-item i {
    font-size: 1.1rem;
    color: var(--color-brand);
    margin-top: 2px;
    flex-shrink: 0;
}
.product-feature-item span {
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
    line-height: 1.55;
}
.btn-recommend-download {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 15px 38px;
    background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
    color: #fff;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition);
    box-shadow: var(--shadow-brand);
    text-decoration: none;
}
.btn-recommend-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 50px rgba(99,102,241,0.5);
    color: #fff;
    text-decoration: none;
}

/* === Float Widget (injected at body end by article-recommend.js) === */
.float-widget {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 320px;
    background: var(--color-white);
    border-radius: 20px;
    box-shadow: var(--shadow-float), 0 0 0 1px rgba(0,0,0,0.05);
    padding: 24px;
    z-index: 9999;
    transform: translateY(20px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.float-widget.visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}
.float-widget-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.float-widget-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-black);
}
.float-widget-logo i {
    color: var(--color-brand);
    font-size: 1.05rem;
}
.float-widget-close {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-bg-light);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-grey-light);
    font-size: 0.8rem;
    transition: var(--transition);
    flex-shrink: 0;
}
.float-widget-close:hover {
    background: #fee2e2;
    color: #dc2626;
}
.float-widget p {
    font-size: 0.87rem;
    color: var(--color-grey-dark);
    line-height: 1.65;
    margin-bottom: 18px;
}
.btn-float-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 11px 20px;
    background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    box-shadow: 0 6px 16px rgba(99,102,241,0.3);
    text-decoration: none;
}
.btn-float-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(99,102,241,0.45);
    color: #fff;
    text-decoration: none;
}

/* === Sidebar TOC === */
.article-sidebar {
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}
.toc-card {
    background: var(--color-white);
    border: 1.5px solid var(--color-border);
    border-radius: 18px;
    padding: 24px;
}
.toc-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-black);
    letter-spacing: 0.6px;
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.toc-title i { color: var(--color-brand); }
.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.toc-list li { margin-bottom: 0; }
.toc-list li a {
    display: block;
    padding: 7px 10px;
    border-radius: 8px;
    font-size: 0.84rem;
    color: var(--color-grey-dark);
    line-height: 1.45;
    transition: var(--transition);
    border-left: 2px solid transparent;
}
.toc-list li a:hover {
    background: var(--color-brand-bg);
    color: var(--color-brand);
    border-left-color: var(--color-brand);
    text-decoration: none;
}
.toc-list li a.active {
    background: var(--color-brand-bg);
    color: var(--color-brand);
    border-left-color: var(--color-brand);
    font-weight: 600;
}

/* === Responsive === */

/* --- Tablet: ≤1024px --- */
@media (max-width: 1024px) {
    .article-page-wrap {
        grid-template-columns: 1fr;
        gap: 0;
        padding: 96px 28px 100px;
    }
    .article-sidebar { display: none; }
    .article-header h1 { font-size: 1.9rem; }
    .product-recommend { padding: 44px 36px; }
    .product-features { grid-template-columns: 1fr 1fr; }
}

/* --- Mobile: ≤768px --- */
@media (max-width: 768px) {
    /* Layout */
    .article-page-wrap { padding: 84px 18px 72px; }

    /* Breadcrumb: allow natural wrap, smaller text */
    .breadcrumb { font-size: 0.8rem; gap: 6px; margin-bottom: 24px; }
    .breadcrumb-current { max-width: 160px; }

    /* Article header */
    .article-header { margin-bottom: 32px; padding-bottom: 28px; }
    .article-header h1 { font-size: 1.5rem; letter-spacing: -0.03em; line-height: 1.25; }
    .article-tags { gap: 6px; margin-bottom: 14px; }
    .article-tag { font-size: 0.72rem; padding: 3px 10px; }

    /* Meta row: wrap onto two lines on narrow screens */
    .article-header-meta {
        gap: 10px 16px;
        font-size: 0.82rem;
        flex-wrap: wrap;
        margin-bottom: 16px;
    }

    /* Article summary */
    .article-summary { font-size: 0.95rem; padding: 14px 16px; }

    /* Article body typography */
    .article-body { font-size: 0.97rem; line-height: 1.82; }
    .article-body h2 { font-size: 1.25rem; margin: 36px 0 12px; padding-bottom: 10px; }
    .article-body h3 { font-size: 1.05rem; margin: 24px 0 10px; }
    .article-body p { margin-bottom: 16px; }

    /* Lists */
    .article-body ul li,
    .article-body ol li { margin-bottom: 8px; }

    /* Code blocks: constrain within content area, allow horizontal scroll */
    .article-body pre {
        padding: 14px 16px;
        border-radius: 8px;
        font-size: 0.82rem;
        margin: 20px 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        max-width: 100%;
    }
    .article-body :not(pre) > code { font-size: 0.84em; }

    /* Callout boxes */
    .callout { padding: 13px 16px; font-size: 0.9rem; margin: 20px 0; }

    /* Inline article CTA */
    .article-cta { padding: 28px 20px; margin: 32px 0; border-radius: 16px; }
    .article-cta h3 { font-size: 1.15rem; }
    .article-cta p { font-size: 0.9rem; margin-bottom: 20px; }
    .btn-article-cta { padding: 12px 24px; font-size: 0.9rem; }

    /* Product recommend section */
    .product-recommend { padding: 32px 20px; border-radius: 20px; margin-top: 56px; }
    .product-recommend h2 { font-size: 1.45rem; }
    .product-recommend > p { font-size: 0.93rem; margin-bottom: 28px; }
    .product-features { grid-template-columns: 1fr; gap: 12px; margin-bottom: 28px; }
    .product-feature-item { padding: 14px 16px; border-radius: 12px; }
    .product-feature-item span { font-size: 0.88rem; }
    .btn-recommend-download {
        width: 100%;
        justify-content: center;
        padding: 13px 20px;
        font-size: 0.95rem;
    }

    /* Float widget: full-width bottom banner on mobile */
    .float-widget {
        width: 100%;
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 16px 16px 0 0;
        padding: 18px 20px;
        box-shadow: 0 -8px 32px rgba(0,0,0,0.12);
    }
}

/* --- Small phones: ≤480px --- */
@media (max-width: 480px) {
    .article-page-wrap { padding: 80px 16px 64px; }
    .article-header h1 { font-size: 1.3rem; }
    .article-body h2 { font-size: 1.15rem; }
    .article-body pre {
        margin: 16px 0;
        padding: 12px 14px;
        font-size: 0.78rem;
    }
    .article-summary { font-size: 0.9rem; }
    .product-recommend { padding: 28px 16px; }
    .product-recommend h2 { font-size: 1.3rem; }
    .breadcrumb-current { max-width: 120px; }
}

/* Wide comparison tables: horizontal scroll on narrow viewports */
.article-body .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}