/* ============================================================
   SAISHI.CSS v3.0 - 赛事/文章/APP 页面专属样式
   ============================================================
   匹配 Section 模板:
   - ArticleSection (单文章详情)
   - AppHeroSection / AppQrSection / AppInstallSection / AppShowcaseSection
   - ContactChannelsSection / ContactFormSection / ContactQuickSection / ContactCommitmentsSection
   - LoginFormSection / SignupFormSection
   - SearchBoxSection (extends)
   - 滚动条 / 打印样式 / 图标
   ============================================================ */

/* ============================================
   1. Single Post (ArticleSection)
   ============================================ */
.single-post {
    overflow: hidden;
}

.single-post .post-meta {
    font-size: 0.9rem;
}

.single-post .post-meta i {
    color: var(--color-primary);
}

/* Post content typography */
.post-content {
    line-height: 1.8;
    font-size: 1.05rem;
    color: var(--color-text);
}

.post-content :is(h2, h3, h4) {
    margin-block: 2rem 1rem;
    font-weight: 700;
    color: var(--color-primary-darker);
    line-height: 1.4;
}

.post-content h2 {
    font-size: 1.75rem;
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--color-border);
}

.post-content h3 {
    font-size: 1.35rem;
}

.post-content :is(p, li) {
    margin-bottom: var(--space-sm);
}

.post-content blockquote {
    border-inline-start: 4px solid var(--color-primary);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-soft);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-block: var(--space-md);
    color: var(--color-text-muted);
    font-style: italic;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin-block: var(--space-sm);
    box-shadow: var(--shadow-sm);
}

.post-content a {
    color: var(--color-primary);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.post-content a:hover {
    color: var(--color-primary-dark);
}

.post-content ul,
.post-content ol {
    padding-inline-start: 1.5rem;
}

.post-content code {
    background: var(--color-bg-muted);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--color-danger);
}

.post-content pre {
    background: var(--color-primary-darker);
    color: #fff;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-block: var(--space-md);
}

.post-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-block: var(--space-md);
}

.post-content table th,
.post-content table td {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border);
    text-align: start;
}

.post-content table th {
    background: var(--color-bg-muted);
    font-weight: 600;
}

/* TOC */
.toc-box {
    border-inline-start: 3px solid var(--color-primary);
}

.toc-box ol {
    padding-inline-start: 1.2rem;
}

.toc-box ol li {
    margin: 0.4rem 0;
}

.toc-box ol li a {
    transition: all var(--transition-fast);
}

.toc-box ol li a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline !important;
    padding-inline-start: 4px;
}

/* Tags */
.post-tags .badge {
    background: var(--color-bg-muted) !important;
    color: #475569 !important;
    padding: 6px 12px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.post-tags .badge:hover {
    background: var(--color-primary) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* Post nav */
.post-nav {
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.post-nav .btn {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================
   2. App Hero (AppHeroSection)
   ============================================ */
.app-hero-section {
    background: var(--gradient-hero);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.app-hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    z-index: 0;
}

.app-hero-section > .container {
    position: relative;
    z-index: 1;
}

.app-hero-section h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.2;
}

.app-hero-section img {
    transition: transform var(--transition-slow);
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.app-hero-section img:hover {
    transform: translateY(-10px);
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.65) !important;
}

/* ============================================
   3. App QR (AppQrSection)
   ============================================ */
.app-qr-section {
    background: var(--color-bg-soft);
}

.qr-card {
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.qr-card:hover {
    transform: scale(1.03);
    border-color: var(--color-accent);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.qr-card img {
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

/* ============================================
   4. App Install Steps (AppInstallSection)
   ============================================ */
.app-install-section {
    background: var(--color-bg-soft);
}

.app-install-section .badge.rounded-circle {
    width: 50px;
    height: 50px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
}

.app-install-section .bg-white {
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.app-install-section .bg-white:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.app-install-section .bg-white::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-icon);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition-base);
}

.app-install-section .bg-white:hover::before {
    transform: scaleY(1);
}

/* ============================================
   5. App Showcase (AppShowcaseSection)
   ============================================ */
.app-showcase-section {
    background: var(--color-bg);
}

.app-showcase-section img {
    transition: transform var(--transition-slow);
    filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.15));
}

.app-showcase-section img:hover {
    transform: translateY(-5px) rotate(-1deg);
}

.app-showcase-section .bg-white {
    transition: all var(--transition-base);
    border-inline-start: 3px solid transparent;
}

.app-showcase-section .bg-white:hover {
    border-inline-start-color: var(--color-primary);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   6. Contact Sections
   ============================================ */
.contact-channels-section {
    background: var(--color-bg);
}

.contact-channels-section article {
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-soft);
}

.contact-channels-section article:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.contact-channels-section article ul li {
    transition: padding var(--transition-fast);
}

.contact-channels-section article ul li:hover {
    padding-inline-start: 4px;
}

/* Contact Quick */
.contact-quick-section {
    background: var(--color-bg-soft);
}

.contact-quick-section .contact-card {
    transition: all var(--transition-base);
}

.contact-quick-section .contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-quick-section .contact-card i {
    transition: transform var(--transition-base);
}

.contact-quick-section .contact-card:hover i {
    transform: scale(1.1) rotate(-5deg);
}

/* Contact Form */
.contact-form-section {
    background: var(--color-bg-soft);
}

.contact-form-section .form-control,
.contact-form-section .form-select {
    border: 2px solid var(--color-border);
    transition: all var(--transition-fast);
}

.contact-form-section .form-control:focus,
.contact-form-section .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.1);
}

.contact-form-section button[type="submit"] {
    transition: all var(--transition-base);
}

.contact-form-section button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* Contact Commitments */
.contact-commitments-section {
    background: var(--color-bg-soft);
}

.contact-commitments-section .bg-white {
    transition: all var(--transition-base);
    text-align: center;
}

.contact-commitments-section .bg-white:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-commitments-section .bg-white i {
    transition: transform var(--transition-base);
}

.contact-commitments-section .bg-white:hover i {
    transform: scale(1.15);
}

/* ============================================
   7. Login / Signup Forms
   ============================================ */
main:has(> .container > .bg-white > form) .input-group-text {
    background-color: var(--color-bg-muted);
    border-color: var(--color-border);
    border-inline-end: none;
}

main:has(> .container > .bg-white > form) .input-group .form-control {
    border-inline-start: none;
}

main:has(> .container > .bg-white > form) .input-group:focus-within .input-group-text {
    border-color: var(--color-primary);
    background-color: #eff6ff;
}

main:has(> .container > .bg-white > form) .input-group:focus-within .form-control {
    border-color: var(--color-primary);
}

main:has(> .container > .bg-white > form) .form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

main:has(> .container > .bg-white > form) button[type="submit"] {
    transition: all var(--transition-base);
    font-weight: 600;
}

main:has(> .container > .bg-white > form) button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* ============================================
   8. Icons
   ============================================ */
.icon-img {
    max-width: 32px;
    max-height: 32px;
    object-fit: contain;
}

.icon-emoji {
    display: inline-block;
    line-height: 1;
}

/* ============================================
   9. Hero Buttons (đã có ở theme.css nhưng bổ sung thêm)
   ============================================ */
.hero-buttons .btn {
    transition: all var(--transition-base);
}

.hero-buttons .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.hero-buttons .btn-warning {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-primary-darker);
    font-weight: 600;
}

.hero-buttons .btn-warning:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.hero-buttons .btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: #fff;
}

/* ============================================
   10. 自定义滚动条
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-muted);
}

::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text
-muted);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: #94a3b8 var(--color-bg-muted);
}

/* ============================================
   11. Print Styles
   ============================================ */
@media print {
    :is(.header,
        .footer,
        .sidebar-widgets,
        .social-share,
        #back-to-top,
        .breadcrumb-nav,
        .notice-bar,
        .cta-banner-section,
        .post-nav,
        .related-posts,
        .author-box,
        .pagination,
        .navbar-toggler,
        .nav-item) {
        display: none !important;
    }

    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 12pt;
    }

    .single-post {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
        max-width: 100% !important;
    }

    .post-content {
        font-size: 11pt;
        line-height: 1.6;
    }

    a {
        text-decoration: underline;
        color: #000 !important;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: #555;
    }

    a[href^="#"]::after,
    a[href^="javascript:"]::after,
    a[href^="mailto:"]::after,
    a[href^="tel:"]::after {
        content: "";
    }

    .post-content img {
        max-width: 100% !important;
        page-break-inside: avoid;
    }

    :is(h1, h2, h3, h4) {
        page-break-after: avoid;
        color: #000 !important;
    }

    p, li {
        orphans: 3;
        widows: 3;
    }
}

/* ============================================
   12. Animations bổ sung
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* ============================================
   13. Responsive
   ============================================ */
@media (max-width: 991.98px) {
    .post-content {
        font-size: 1rem;
    }

    .post-content h2 {
        font-size: 1.5rem;
    }

    .post-content h3 {
        font-size: 1.2rem;
    }
}

@media (max-width: 767.98px) {
    .single-post {
        padding: var(--space-md) !important;
    }

    .post-content {
        font-size: 0.95rem;
    }

    .post-content h2 {
        font-size: 1.35rem;
    }

    .post-nav {
        flex-direction: column;
    }

    .post-nav .btn {
        width: 100%;
    }

    .post-tags .badge {
        font-size: 0.8rem;
        padding: 4px 8px;
    }

    .app-hero-section h1 {
        font-size: 1.75rem;
    }

    .app-install-section .badge.rounded-circle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .toc-box {
        padding: var(--space-sm) !important;
    }

    .qr-card img {
        max-width: 140px !important;
    }
}

We need to interpret the instruction carefully. We are given a CSS snippet (block 2/2 of a file maybe). The task is to refresh visual identity without changing layout structure or class names. The HTML is fixed. Only colors, shadows, and decorative properties may change.

We have a small CSS block, including a media query and some rules. We need to output the rewritten CSS. Since this is a snippet, there are only a few declarations. Let's examine:

Original:
```
@media (max-width: 575.98px) {
    .app-hero-section .row .col-lg-7 {
        text-align: center;
    }

    .app-hero-section .badge.bg-warning {
        font-size: 0.85rem;
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
    }
}
```

Now, what can we change? The rules are pretty simple:
- text-align: center; (layout property, but it's a visual alignment. However, in the "never change" list, text-align is listed as NEVER CHANGE: "text-align, vertical-align". So we cannot change text-align. It stays center.
- font-size: 0.85rem; (never change: font-size, font-weight, font-style. So cannot change font-size. Must keep 0.85rem.)
- padding: var(--space-md) !important; (never change: padding, margin (keep similar values ±20%). The value is a CSS custom property. We may change the custom property value globally? But in this rule, we are not allowed to change padding itself. We could potentially introduce a new --space-md value? However, that might affect elsewhere. The conservative mode says CSS custom properties (--color-*, --shadow-*) values may change, but --space-md is a spacing variable, not color/shadow. The instruction says "CSS custom properties (--color-*, --shadow-*) values" can change. It doesn't mention --space-* vars. So we should not change --space-md value, and we cannot change padding. Thus this rule remains exactly.

But the instruction says "Refresh this CSS visually. Keep ALL selectors and layout exactly as-is. Only change colors, shadows, radius, transitions, gradients." This snippet has no colors, shadows, radius, transitions, gradients. So perhaps there is nothing to change. But we still need to output the rewritten CSS. The "target style" is editorial-magazine with airy-rhythm, but the CSS rules constrain us.

Maybe we can add new declarations to these selectors? The task says "Only change colors, shadows, radius, transitions, gradients." It doesn't say "add new declarations" but to refresh visually, we could introduce color or background to the badge? But that would be adding declarations, not changing existing ones. The output should be the rewritten CSS. In conservative mode, we can change existing values of allowed properties, but can we add new declarations? Usually no, unless the original had them. The instruction says "ALL selectors and layout exactly as-is" and "Only change colors, shadows, radius, transitions, gradients." That could mean we can modify existing declarations of those types, and perhaps add new ones of those types? But adding new properties might affect layout? For example, adding background-color to the badge might be fine. However, the scope is "visual identity". Since there are no color declarations, the only way to refresh is to add color or background to the badge and maybe border-radius to cards? But that changes the elements' appearance, potentially intended.

Let's parse the instruction carefully: "Refresh this CSS visually. Keep ALL selectors and layout exactly as-is. Only change colors, shadows, radius, transitions, gradients." It could mean "only modify the values of these properties if they exist; do not alter any other property types." In the given snippet, no such properties exist. So the output would be the same? That seems unhelpful.

But maybe the "allowed to change" list includes "all color values: background, color, border-color, fill, stroke, outline-color" and "border-radius" etc. If they are absent, we could add them? The instruction under "✅ YOU MUST CHANGE (visual identity only)" lists categories to change, not necessarily to add. But typically in a CSS rewrite task, we are allowed to rewrite the CSS, potentially adding new declarations as long as they don't affect layout. But the "NEVER CHANGE" list includes padding, etc. So we could add background-color to `.app-hero-section .badge.bg-warning` to make it stand out, but the original had no background-color (the class bg-warning likely provides background via Bootstrap, but that's outside this CSS block). Adding a background-color would override the Bootstrap class, which might be a visual refresh. Similarly, we could add box-shadow to the contact-card, etc.

The target style "editorial-magazine" suggests cream/beige background, ink black text, deep red accent. Since we only have this block, perhaps the overall stylesheet already has the main styles, and this block is responsive tweaks for mobile. The visual refresh might involve adding color accents in these mobile rules.

But the task might be a test: follow the rules, don't hallucinate. The explicit rubric says "Only change colors, shadows, radius, transitions, gradients" and "Output the rewritten CSS now". If there is nothing to change, maybe output the original CSS exactly. But "YOU MUST CHANGE" indicates we should change something. Yet we can't change layout properties. In this snippet, all existing properties are layout/typography. So we are stuck.

Let's re-evaluate the "NEVER CHANGE" list: 
- text-align is listed under Layout? Actually it's under "📐 LAYOUT": "text-align, vertical-align" are in the second line of layout, yes. So cannot change.
- font-size is typography, cannot change.
- padding is layout, cannot change (though ±20% allowed, but it's var --space-md so we can't easily change).

Thus there is literally no allowed property to change. What to do? Maybe we can add extra rules? The instruction says "Keep ALL selectors and layout exactly as-is" but also "Refresh this CSS visually". Maybe we can add new declarations within existing rules? For example, to the `.app-hero-section .badge.bg-warning` rule, we could add `background-color: #c44536; color: #fff; border-radius: 2rem;` etc. That would refresh visually without altering selectors. But is that allowed? The "YOU MUST CHANGE" list includes "background, color, border-radius". So adding those properties is a way to "change" them (from default/outside cascade). However, the instruction says "Only change colors, shadows, radius, transitions, gradients." That could mean "only alter existing values of these types, but you may add new declarations of these types as part of the visual refresh." Usually in these tasks, we are allowed to add declarations. But the system prompt says "The HTML is FIXED — only colors, shadows, and decorative properties may change." That strongly suggests we can add decorative properties.

But also the "Self-Check" says "Colors throughout the file replaced with fresh palette?" In this file, there are no colors. We can't "replace" nonexistent colors. The check might expect us to add colors.

Perhaps the intended approach is to preserve the selectors and media query, and for each rule, we can add allowed decorative properties while keeping the existing layout/typography declarations exactly. So the output could be:
```
@media (max-width: 575.98px) {
    .app-hero-section .row .col-lg-7 {
        text-align: center;
    }

    .app-hero-section .badge.bg-warning {
        font-size: 0.85rem;
        background-color: #c44536;
        color: #fff;
        border-radius: 2rem;
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
        border-radius: 24px;
        box-shadow: 0 12px 32px rgba(110, 108, 98, 0.12);
        background-color: #ffffff;
    }
}
```

But wait, adding background-color to the contact cards might change layout? Background color does not affect layout. Box-shadow and border-radius also do not affect layout. Good.

But should we add a transition? "transition timing, easing, duration" can change, but there is no transition. Could add transition on the card for hover effect. But if there is no hover rule, transition still applies to hover states from other rules. Adding `transition: box-shadow 0.3s ease, transform 0.3s ease;` but transform is layout? Actually transform is not in the never-change list. Wait, the never-change list doesn't include transform explicitly. But transform can affect visual positioning and might contradict "layout structure". The safe approach: only add color, background-color, border-radius, box-shadow. No transitions if there's no hover? Actually adding transitions is allowed (decorative), but if no property changes, it won't matter. Still, it's safe.

But is it appropriate to add a background to the `.contact-card`? The original doesn't have one; the card might have a background from parent or be transparent. Adding a white background could create a visual card style, aligning with airy-rhythm. That might be desired.

However, the HTML structure is fixed, but adding background-color might rely on classes that already exist. The card presumably has some background from base styles; this mobile media query would override it. That's fine.

Let's follow the target style: editorial-magazine with cream/beige backgrounds, ink #1a1a1a, deep red #c44536. Our new palette:
- Background cream: #f5f1e8 or maybe #faf7f2.
- Ink: #1a1a1a.
- Accent deep red: #c44536.
- Olive secondary: #6b705c.

For `.app-hero-section .badge.bg-warning`, the existing bg-warning class in Bootstrap gives a yellow background. We can override with deep red accent and white text, or maybe olive with cream. Since it's a warning badge, maybe use the accent color. Element is a badge; adding border-radius and text-shadow? Let's make it a stylish pill badge.

For the contact cards, create soft pillowy shadows and rounded corners.

Also, perhaps we can add `background-color` to the hero column? No, that's a section, might affect layout? Background color doesn't affect layout, but could make the mobile hero have a cream background. But we don't know the DOM. Better not.

Let's be conservative: modify existing rules by adding allowed declarations. But there is a catch: The media query is max-width 575.98px, so these are mobile-only overrides. If we add background to `.contact-channels-section article` and `.contact-quick-section .contact-card`, it would affect mobile only. That's fine.

The "airy-rhythm" variant suggests generous padding and large border-radius, but padding we cannot change much (it's var(--space-md)), and the selector already has `!important`. We can add border-radius 24px and soft shadow.

Now, about the self-check: "Every selector character-for-character preserved?" Yes. "display, position, grid-template-*, flex-direction unchanged?" We won't add any. "width, height, padding, margin within ±20% of input?" We don't change them. "font-family, font-size, font-weight, line-height unchanged?" We keep font-size. "Colors throughout the file replaced with fresh palette?" We add colors. "Shadows redesigned (different offsets, colors)?" We add new shadows. "Border-radius adjusted for new visual style?" We add. "No AI marker comments?" Yes.

Should we add a `caret-color` or `accent-color`? Probably unnecessary.

Let's construct the output. We need to preserve the exact selectors and existing declarations. We can reorder? Probably keep existing declarations then add new ones. The output must be valid.

We also might consider the `.app-hero-section .row .col-lg-7` rule. It only has text-align center. Could we add `color: #1a1a1a;` or maybe `background-color: transparent;`? Not needed. But to use the palette, maybe add `color: #1a1a1a;`? It's likely already dark. Could add a subtle text shadow? No, that might harm readability. Better leave as is.

The `.app-hero-section .badge.bg-warning` has font-size 0.85rem. We can add:
- `background-color: #c44536;`
- `color: #f5f1e8;`
- `border-radius: 999px;` (pill shape)
- `box-shadow: 0 4px 12px rgba(196, 69, 54, 0.35);` (soft colored shadow)
- maybe `padding` cannot change? We shouldn't add padding because it's a layout property. But adding padding would be decorative? It would affect layout, so no.

For the contact card rule:
- `border-radius: 24px;`
- `background-color: #ffffff;` or `#fffdf8` (warm white)
- `box-shadow: 0 16px 40px -12px rgba(26, 26, 26, 0.12), 0 4px 12px rgba(26, 26, 26, 0.06);` multi-layer pillowy shadow
- Maybe `border: 1px solid #e8e2d6;` but border-width cannot change? Wait, border-color can change; border-style can change; border-width is not mentioned in the "never change" list? It says "border-color and border-style (NOT border-width)" can change. Border-width is not in the never-change list? Let's check: Under "NEVER CHANGE", there is no mention of border-width. The "YOU MUST CHANGE" list includes "border-color" but not border-width. However, adding a border of 1px might affect layout if box-sizing is content-box; if it's border-box, it's fine. But we don't know. To be safe, avoid adding border. Use box-shadow for border effect instead. Also border-radius is safe.

Should we add `transition`? Maybe `transition: box-shadow 0.3s ease, background-color 0.3s ease;` But without hover rules, it's harmless. It's decorative. Could add, but not necessary.

Now, there is a concern: Adding new declarations in a media query for mobile might override base styles in a way that is too aggressive. But the task asks to refresh visual identity. Let's proceed.

Let's also consider that the original CSS file is "saishi.css" and this is block 2/2. The block only contains this media query. We must output only this block, preserving the media query.

Let's write the output:

```
@media (max-width: 575.98px) {
    .app-hero-section .row .col-lg-7 {
        text-align: center;
    }

    .app-hero-section .badge.bg-warning {
        font-size: 0.85rem;
        background-color: #c44536;
        color: #f5f1e8;
        border-radius: 999px;
        box-shadow: 0 4px 14px rgba(196, 69, 54, 0.3);
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
        background-color: #fffdf8;
        border-radius: 24px;
        box-shadow: 0 18px 40px -12px rgba(26, 26, 26, 0.12), 0 4px 12px rgba(26, 26, 26, 0.06);
    }
}
```

But wait: The rule for `.contact-quick-section .contact-card` originally has padding var(--space-md) !important. If we add background-color and border-radius, it will apply to both `.contact-channels-section article` and `.contact-quick-section .contact-card`. That's fine.

But maybe the "contact-channels-section article" already has a background; overriding it might be okay. Let's make the background a warm cream to match editorial palette: `#fffdf8` is a slight cream. Or `#faf6ef`. We can also make the background transparent? But then shadow won't show nicely. A white/cream card with shadow is good.

One nuance: The target style "editorial-magazine" often uses off-white backgrounds but cards might be white. We'll use `#ffffff` for pure white cards and `#f5f1e8` as page background. Since we're not changing page background, white cards provide contrast. Use `#ffffff`.

Color palette: editorial neutrals: cream/beige backgrounds (#f5f1e8), ink black text (#1a1a1a). Single accent deep red #c44536. So we can use #fff for card background, #1a1a1a for text? We don't want to set text color to #1a1a1a unless we know it's appropriate. The card likely has text. Adding `color: #1a1a1a;` might override link colors? It could be too aggressive. But the instruction says "color" can change. We could set `color: #1a1a1a;` to ensure ink text. However, if the card contains links with their own color, this would override them. That might be bad. Better not set global color. Similarly, for badge, setting color to #f5f1e8 is fine because badge text should contrast with red background.

Let's think about the badge: `.badge.bg-warning` bootstrap warning badge has yellow background and dark text. We replace with deep red background and cream text. That's a clear visual refresh.

Should we also add `box-shadow` to hero section? No, no selector for that.

Let's consider transitions. Could add `transition: background-color 0.3s ease, box-shadow 0.3s ease, border-radius 0.3s ease;` to the card. But if no property changes on hover, it's useless.