/* 图片压缩狗品牌主题 */

:root {
    --cdog-primary: #FF6B35;
    --cdog-primary-dark: #E5562A;
    --cdog-primary-soft: #FFE7DA;
    --cdog-ink: #1F2937;
    --cdog-ink-2: #4B5563;
    --cdog-ink-3: #6B7280;
    --cdog-line: #F0E6DA;
    --cdog-bg: #FFFCF7;
    --cdog-bg-light: #FFF8F0;
    --cdog-blue: #0A2342;
}

/* 基础样式 */
.cdog-page {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif !important;
    background-color: var(--cdog-bg) !important;
    color: var(--cdog-ink);
    line-height: 1.7;
}

.cdog-page h1,
.cdog-page h2,
.cdog-page h3 {
    color: var(--cdog-blue);
    letter-spacing: 0.5px;
}

.cdog-page a {
    color: var(--cdog-primary);
    transition: color 0.2s;
}

.cdog-page a:hover {
    color: var(--cdog-primary-dark);
    text-decoration: none;
}

/* 导航栏 */
.cdog-navbar {
    background: #FFFFFFCC !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 18px rgba(255, 107, 53, 0.08);
    padding: 5px 0;
    border-bottom: 1px solid var(--cdog-line);
}

.cdog-brand-link {
    display: inline-flex !important;
    align-items: center;
}

.cdog-brand-text {
    color: var(--cdog-blue) !important;
    font-weight: 700;
    font-size: 20px;
    letter-spacing: 1px;
    margin-left: 5px;
}

.cdog-navbar .nav-link {
    color: var(--cdog-ink-2) !important;
    font-weight: 500;
    padding: 8px 14px !important;
    border-radius: 8px;
    transition: all 0.2s;
}

.cdog-navbar .nav-link:hover,
.cdog-navbar .nav-item.active .nav-link {
    color: var(--cdog-primary) !important;
    background: var(--cdog-primary-soft);
}

/* 主视觉 */
.cdog-hero {
    padding: 100px 0 10px;
    background:
        radial-gradient(ellipse at top right, rgba(255, 107, 53, 0.12), transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(10, 35, 66, 0.06), transparent 55%),
        var(--cdog-bg);
}

.cdog-hero-row {
    min-height: 460px;
}

.cdog-badge {
    display: inline-block;
    background: var(--cdog-primary-soft);
    color: var(--cdog-primary-dark);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 22px;
}

.cdog-hero-title {
    font-size: 44px;
    font-weight: 700;
    line-height: 1.25;
    color: var(--cdog-blue);
    margin-bottom: 18px;
}

.cdog-accent {
    color: var(--cdog-primary);
    position: relative;
    display: inline-block;
}

.cdog-accent::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 100%;
    height: 10px;
    background: var(--cdog-primary-soft);
    z-index: -1;
    border-radius: 4px;
}

.cdog-hero-sub {
    color: var(--cdog-ink-2);
    font-size: 16px;
    margin-bottom: 28px;
    max-width: 540px;
}

.cdog-hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.cdog-btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none !important;
    letter-spacing: 0.5px;
}

.cdog-btn-primary {
    background: var(--cdog-primary);
    color: #FFFFFF !important;
    box-shadow: 0 6px 18px rgba(255, 107, 53, 0.35);
}

.cdog-btn-primary:hover {
    background: var(--cdog-primary-dark);
    transform: translateY(-2px);
    color: #FFFFFF !important;
}

.cdog-btn-ghost {
    background: transparent;
    color: var(--cdog-blue) !important;
    border: 2px solid var(--cdog-blue);
}

.cdog-btn-ghost:hover {
    background: var(--cdog-blue);
    color: #FFFFFF !important;
}

.cdog-btn-lg {
    padding: 10px 22px;
    font-size: 14px;
}

.cdog-hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.cdog-stat {
    display: flex;
    flex-direction: column;
}

.cdog-stat-num {
    font-size: 28px;
    font-weight: 700;
    color: var(--cdog-primary);
    line-height: 1.1;
}

.cdog-stat-label {
    font-size: 13px;
    color: var(--cdog-ink-3);
    margin-top: 4px;
}

.cdog-hero-right {
    text-align: center;
}

.cdog-hero-card {
    display: inline-block;
    position: relative;
    background: #FFFFFF;
    padding: 30px;
    border-radius: 28px;
    box-shadow: 0 20px 60px rgba(10, 35, 66, 0.08), 0 6px 24px rgba(255, 107, 53, 0.12);
    transform: rotate(-3deg);
    transition: transform 0.3s;
}

.cdog-hero-card:hover {
    transform: rotate(0deg);
}

.cdog-hero-img {
    width: 260px;
    height: 260px;
    display: block;
}

.cdog-hero-tag {
    position: absolute;
    bottom: -14px;
    left: 50%;
    transform: translateX(-50%) rotate(3deg);
    background: var(--cdog-blue);
    color: #FFFFFF;
    padding: 6px 18px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

/* 区块 */
.cdog-section {
    padding: 30px 0;
}

.cdog-section-light {
    background: var(--cdog-bg-light);
}

.cdog-section-thin {
    padding: 30px 0;
}

.cdog-section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 50px;
}

.cdog-section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--cdog-blue);
}

.cdog-section-sub {
    color: var(--cdog-ink-3);
    font-size: 16px;
}

/* 格式卡片 */
.cdog-format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}

.cdog-format-card {
    background: #FFFFFF;
    padding: 24px;
    border-radius: 18px;
    border: 1px solid var(--cdog-line);
    transition: all 0.25s;
}

.cdog-format-card:hover {
    border-color: var(--cdog-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(255, 107, 53, 0.12);
}

.cdog-format-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 12px;
}

.cdog-tag-orange { background: #FF6B35; }
.cdog-tag-blue { background: #2563EB; }
.cdog-tag-green { background: #10B981; }
.cdog-tag-purple { background: #8B5CF6; }
.cdog-tag-pink { background: #EC4899; }
.cdog-tag-teal { background: #14B8A6; }

.cdog-format-card p {
    color: var(--cdog-ink-2);
    font-size: 14px;
    line-height: 1.7;
    margin: 0;
}

/* 为什么选它 */
.cdog-why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.cdog-why-item {
    background: #FFFFFF;
    padding: 28px 24px;
    border-radius: 16px;
    border: 1px solid var(--cdog-line);
    text-align: left;
    transition: all 0.25s;
}

.cdog-why-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 36px rgba(10, 35, 66, 0.08);
}

.cdog-why-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.cdog-why-item h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin-bottom: 10px;
}

.cdog-why-item p {
    color: var(--cdog-ink-2);
    font-size: 14px;
    margin: 0;
}

/* 使用步骤 */
.cdog-steps {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.cdog-step {
    display: flex;
    gap: 24px;
    background: #FFFFFF;
    padding: 28px;
    border-radius: 18px;
    border: 1px solid var(--cdog-line);
    transition: all 0.25s;
}

.cdog-step:hover {
    border-color: var(--cdog-primary);
    transform: translateX(6px);
}

.cdog-step-num {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--cdog-primary);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    box-shadow: 0 6px 16px rgba(255, 107, 53, 0.3);
}

.cdog-step-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin: 0 0 8px;
}

.cdog-step-body p {
    color: var(--cdog-ink-2);
    margin: 0;
    font-size: 14.5px;
}

.cdog-link {
    color: var(--cdog-primary);
    text-decoration: underline;
}

/* 适用场景 */
.cdog-scene-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}

.cdog-scene {
    background: #FFFFFF;
    padding: 24px;
    border-radius: 16px;
    border-left: 4px solid var(--cdog-primary);
    box-shadow: 0 2px 8px rgba(10, 35, 66, 0.04);
    transition: all 0.25s;
}

.cdog-scene:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(10, 35, 66, 0.08);
}

.cdog-scene h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin: 0 0 8px;
}

.cdog-scene p {
    color: var(--cdog-ink-2);
    font-size: 14px;
    margin: 0;
}

/* FAQ */
.cdog-faq-wrap {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.cdog-faq {
    background: #FFFFFF;
    border: 1px solid var(--cdog-line);
    border-radius: 14px;
    padding: 18px 24px;
    transition: all 0.2s;
}

.cdog-faq[open] {
    border-color: var(--cdog-primary);
    box-shadow: 0 6px 24px rgba(255, 107, 53, 0.08);
}

.cdog-faq summary {
    font-size: 16px;
    font-weight: 600;
    color: var(--cdog-blue);
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 30px;
}

.cdog-faq summary::-webkit-details-marker { display: none; }

.cdog-faq summary::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    color: var(--cdog-primary);
    transition: transform 0.2s;
}

.cdog-faq[open] summary::after { content: '−'; }

.cdog-faq p {
    color: var(--cdog-ink-2);
    margin-top: 12px;
    margin-bottom: 0;
    font-size: 14.5px;
    line-height: 1.8;
}

/* 故事区 */
.cdog-story-wrap {
    max-width: 760px;
    margin: 0 auto;
    background: #FFFFFF;
    padding: 40px 36px;
    border-radius: 22px;
    border: 1px solid var(--cdog-line);
}

.cdog-story-wrap p {
    color: var(--cdog-ink);
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 16px;
}

.cdog-story-list {
    list-style: none;
    padding: 0;
    margin: 0 0 18px;
}

.cdog-story-list li {
    position: relative;
    padding-left: 26px;
    margin-bottom: 6px;
    color: var(--cdog-ink-2);
    font-size: 15px;
}

.cdog-story-list li::before {
    content: '🐾';
    position: absolute;
    left: 0;
    top: 0;
}

.cdog-story-meta {
    color: var(--cdog-ink-3);
    font-size: 13px;
    margin-top: 30px;
    border-top: 1px dashed var(--cdog-line);
    padding-top: 18px;
}

/* Footer 差异化 */
.cdog-footer {
    background: var(--cdog-blue) !important;
    color: #C7D2E0 !important;
}

.cdog-footer h3.footer-title {
    color: #FFFFFF !important;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cdog-footer ul {
    list-style: none;
    padding: 0;
}

.cdog-footer ul li a {
    color: #A6B5C8 !important;
    font-size: 14px;
    line-height: 2.1;
}

.cdog-footer ul li a:hover {
    color: var(--cdog-primary) !important;
}

.cdog-footer-brand {
    color: #FFFFFF;
    font-size: 20px;
    font-weight: 700;
    margin-left: 10px;
    vertical-align: middle;
}

.cdog-footer-desc {
    color: #93A1B3;
    font-size: 14px;
    line-height: 1.85;
}

.cdog-footer .social-icon a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #1B3357;
    color: #FFFFFF !important;
    margin-right: 8px;
    transition: background 0.2s;
}

.cdog-footer .social-icon a:hover {
    background: var(--cdog-primary);
}

.cdog-footer-tip {
    color: #7B8CA3;
    font-size: 13px;
    margin-top: 14px;
}

.cdog-copyright {
    background: #061528;
    padding: 18px 0;
}

.cdog-copyright p {
    color: #6B7E96;
    text-align: center;
    margin: 0;
    font-size: 13px;
    line-height: 1.9;
}

.cdog-copyright a {
    color: #A6B5C8;
}

.cdog-copyright a:hover {
    color: var(--cdog-primary);
}

.cdog-icp {
    color: #506680 !important;
}

/* 详情页：面包屑、标题 */
.cdog-detail-intro {
    padding: 85px 0 5px;
    background: linear-gradient(180deg, var(--cdog-bg-light) 0%, var(--cdog-bg) 100%);
}

.cdog-bread {
    color: var(--cdog-ink-3);
    font-size: 13px;
    margin-bottom: 14px;
}

.cdog-bread a {
    color: var(--cdog-ink-3);
}

.cdog-bread a:hover {
    color: var(--cdog-primary);
}

.cdog-bread-sep {
    margin: 0 8px;
}

.cdog-detail-title {
    font-size: 30px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin-bottom: 10px;
}

.cdog-detail-sub {
    color: var(--cdog-ink-2);
    font-size: 15px;
    margin: 0;
}

/* 详情页工具区 */
.cdog-tool-section {
    padding: 30px 0 60px;
}

.cdog-tool-row {
    background: #FFFFFF;
    border-radius: 22px;
    box-shadow: 0 12px 40px rgba(10, 35, 66, 0.06);
    padding: 5px 20px;
    border: 1px solid var(--cdog-line);
}

.cdog-tool-card {
    padding: 12px 14px;
}

.cdog-tool-panel {
    border-left: 1px dashed var(--cdog-line);
    border-right: 1px dashed var(--cdog-line);
}

.cdog-panel-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin-bottom: 16px;
    text-align: center;
}

.cdog-card-tip {
    display: inline-block;
    background: var(--cdog-blue);
    color: #FFFFFF;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 10px;
}

.cdog-card-tip-after {
    background: var(--cdog-primary);
}

.cdog-meta {
    font-size: 14px;
    color: var(--cdog-ink-2);
    margin-bottom: 4px;
}

.cdog-meta-hot {
    color: var(--cdog-primary);
    font-weight: 600;
}

.cdog-preview-img {
    margin-top: 10px;
    border: 1px solid var(--cdog-line);
}

.cdog-control {
    margin-top: 22px;
}

.cdog-control-label {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--cdog-blue);
    margin-bottom: 8px;
}

.cdog-control-label small {
    color: var(--cdog-ink-3);
    font-weight: normal;
}

.cdog-slider-value {
    color: var(--cdog-primary);
    font-weight: 700;
    margin-left: auto;
}

.cdog-control-opts {
    margin-top: 18px;
}

.cdog-check {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--cdog-ink-2);
    cursor: pointer;
}

.cdog-check input { accent-color: var(--cdog-primary); }

.cdog-check-tip {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--cdog-primary-soft);
    color: var(--cdog-primary);
    font-size: 12px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.cdog-control-actions {
    margin-top: 26px;
    text-align: center;
}

.cdog-loading-text {
    color: var(--cdog-primary-dark);
    font-weight: 600;
    font-size: 14px;
}

/* 引擎介绍卡片 */
.cdog-engine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.cdog-engine-card {
    background: #FFFFFF;
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--cdog-line);
}

.cdog-engine-name {
    display: inline-block;
    background: var(--cdog-blue);
    color: #FFFFFF;
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    font-family: "JetBrains Mono", "Fira Code", monospace;
    margin-bottom: 14px;
}

.cdog-engine-card p {
    color: var(--cdog-ink-2);
    margin: 0;
    font-size: 14px;
    line-height: 1.8;
}

/* 教程 */
.cdog-tutorial {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cdog-tutorial-row {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    background: var(--cdog-bg-light);
    padding: 24px;
    border-radius: 16px;
}

.cdog-tutorial-num {
    flex-shrink: 0;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: #FFFFFF;
    color: var(--cdog-primary);
    border: 2px solid var(--cdog-primary);
    font-weight: 700;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cdog-tutorial-body h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin: 4px 0 8px;
}

.cdog-tutorial-body p {
    color: var(--cdog-ink-2);
    font-size: 14.5px;
    margin: 0;
}

/* 文档页 */
.cdog-doc-wrap {
    padding: 85px 0 60px;
    background: var(--cdog-bg);
}

.cdog-doc-article {
    background: #FFFFFF;
    border-radius: 20px;
    padding: 40px;
    border: 1px solid var(--cdog-line);
    max-width: 860px;
    margin: 0 auto;
}

.cdog-doc-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin-bottom: 8px;
}

.cdog-doc-meta {
    color: var(--cdog-ink-3);
    font-size: 13px;
    margin-bottom: 30px;
    padding-bottom: 18px;
    border-bottom: 1px dashed var(--cdog-line);
}

.cdog-doc-section {
    margin-bottom: 26px;
}

.cdog-doc-h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--cdog-blue);
    margin: 0 0 10px;
    padding-left: 14px;
    border-left: 4px solid var(--cdog-primary);
}

.cdog-doc-p {
    color: var(--cdog-ink-2);
    white-space: pre-wrap;
    font-size: 14.5px;
    line-height: 1.9;
    margin: 0;
}

/* 错误页 */
.cdog-error-page {
    background: var(--cdog-bg);
}

.cdog-error-wrap {
    padding: 140px 0 100px;
}

.cdog-error-img {
    margin-bottom: 20px;
    filter: drop-shadow(0 14px 30px rgba(255, 107, 53, 0.25));
}

.cdog-error-code {
    font-size: 80px;
    font-weight: 800;
    color: var(--cdog-primary);
    margin: 0;
    letter-spacing: 4px;
    line-height: 1;
}

.cdog-error-msg {
    font-size: 24px;
    color: var(--cdog-blue);
    margin: 12px 0 6px;
    font-weight: 700;
}

.cdog-error-tip {
    color: var(--cdog-ink-3);
    margin-bottom: 30px;
}

.cdog-error-wrap .cdog-btn {
    margin: 0 6px;
}

/* 响应式 · 平板及以下 */
@media (max-width: 991px) {
    .cdog-section { padding: 60px 0; }
    .cdog-section-thin { padding: 8px 0; }
    .cdog-tool-section { padding-top: 14px; padding-bottom: 30px; }
    .cdog-detail-intro { padding: 76px 0 16px; }
    .cdog-ad-rail { display: none; }       /* 移动端隐藏侧边广告位 */
    .cdog-tool-row { padding: 8px 6px; row-gap: 0; }
    .cdog-tool-card { margin-bottom: 12px; padding: 14px 12px; }
    .cdog-tool-panel { border: none; padding-bottom: 6px; }
    /* 让外层包裹工具区的 col-md-8 在移动端撑满 */
    .cdog-tool-section .container > .row > .col-md-8 { flex: 0 0 100%; max-width: 100%; }
}

/* md 屏：控制面板顶部一整条，下方原图与结果对半 */
@media (min-width: 768px) and (max-width: 991px) {
    .cdog-tool-row > .cdog-tool-panel {
        flex: 0 0 100%;
        max-width: 100%;
        order: -1;
        border-bottom: 1px dashed var(--cdog-line);
        padding-bottom: 16px;
        margin-bottom: 8px;
    }
    /* 原图 / loading / 压缩后 都各 50%；loading 与压缩后互斥显示，所以恰好两列 */
    .cdog-tool-row > #origin-img-preview,
    .cdog-tool-row > #compress-img-loading,
    .cdog-tool-row > #compress-img-preview {
        flex: 0 0 50%;
        max-width: 50%;
    }
    .cdog-tool-row > #origin-img-preview { order: 1; }
    .cdog-tool-row > #compress-img-loading { order: 2; }
    .cdog-tool-row > #compress-img-preview { order: 2; }
}

/* sm/xs 屏：单列堆叠，控制面板提到首屏，原图、loading、结果随后 */
@media (max-width: 767.98px) {
    .cdog-tool-row > .cdog-tool-card { flex: 0 0 100%; max-width: 100%; }
    .cdog-tool-row > .cdog-tool-panel {
        order: -1;
        border-bottom: 1px dashed var(--cdog-line);
        margin-bottom: 12px;
        padding-bottom: 6px;
    }
    .cdog-tool-row > #origin-img-preview { order: 1; }
    .cdog-tool-row > #compress-img-loading { order: 2; }
    .cdog-tool-row > #compress-img-preview { order: 3; }

    /* 卡片内字号、预览图限高，防止主图过大顶飞首屏 */
    .cdog-card-tip { font-size: 12px; padding: 3px 8px; margin-bottom: 8px; }
    .cdog-meta { font-size: 13px; line-height: 1.6; }
    .cdog-preview-img { max-height: 240px; width: auto; margin-left: auto; margin-right: auto; display: block; object-fit: contain; }
    .cdog-panel-title { font-size: 15px; margin-bottom: 12px; }

    /* 下载按钮在小屏占满宽度，方便单手点击 */
    .cdog-control-actions { text-align: center; }
    #download-compress-img { display: inline-block; width: 100%; }
    .cdog-btn-lg { width: 100%; }
}


/* footer 中等屏：原先 6+3+3+6 第四列会换行留白，统一让第一列整宽，
 * 后三列按 4/4/4 分配，避免空白格 */
@media (min-width: 768px) and (max-width: 991px) {
    .cdog-footer .row > .col-md-6,
    .cdog-footer .row > .col-md-3 {
        flex: 0 0 auto;
    }
    .cdog-footer .row > .col-lg-5 { width: 100%; max-width: 100%; }
    .cdog-footer .row > .col-lg-2 { width: 33.3333%; max-width: 33.3333%; }
    .cdog-footer .row > .col-lg-3 { width: 33.3333%; max-width: 33.3333%; }
}

/* 响应式 · 手机 */
@media (max-width: 768px) {
    .cdog-hero-title { font-size: 28px; line-height: 1.35; }
    .cdog-hero-sub { font-size: 15px; }
    .cdog-section-title { font-size: 22px; }
    .cdog-section-sub { font-size: 14px; }
    .cdog-section { padding: 50px 0; }
    .cdog-hero { padding: 100px 0 50px; }
    .cdog-hero-right { margin-top: 30px; }
    .cdog-hero-img { width: 180px; height: 180px; }
    .cdog-hero-stats { gap: 18px; flex-wrap: wrap; justify-content: center; }
    .cdog-hero-cta { flex-wrap: wrap; gap: 10px; }
    .cdog-hero-cta .cdog-btn { flex: 1 1 auto; min-width: 140px; }

    .cdog-step { flex-direction: column; gap: 14px; padding: 22px; }
    .cdog-tutorial-row { flex-direction: column; gap: 14px; }
    .cdog-tool-panel { border: none; padding-top: 24px; padding-bottom: 24px; }
    .cdog-doc-article { padding: 28px 20px; }
    .cdog-error-code { font-size: 60px; }

    /* 详情页头部 */
    .cdog-detail-title { font-size: 22px; margin-bottom: 6px; }
    .cdog-detail-sub { font-size: 13px; line-height: 1.6; margin-bottom: 0; }
    .cdog-bread { font-size: 13px; margin-bottom: 8px; }

    /* 网格卡片：原图 / 压缩后 / 引擎 / 场景 / FAQ */
    .cdog-engine-grid,
    .cdog-scene-grid,
    .cdog-format-grid,
    .cdog-why-grid { gap: 14px; }

    .cdog-engine-card,
    .cdog-scene,
    .cdog-format-card,
    .cdog-why-item { padding: 18px; }

    .cdog-faq summary { font-size: 15px; }
    .cdog-faq p { font-size: 14px; }

    /* 控制面板：滑块、按钮在小屏更紧凑 */
    .cdog-control { margin-bottom: 16px; }
    .cdog-control-label { flex-wrap: wrap; gap: 6px; }
    .cdog-btn-lg { padding: 12px 22px; font-size: 15px; }

    /* footer：移动端紧凑布局 */
    .cdog-footer { padding: 40px 0 20px !important; }
    .cdog-footer .footer-title { margin-top: 18px; font-size: 15px; }
    .cdog-footer-desc { font-size: 13px; line-height: 1.7; }
    .cdog-footer-tip { font-size: 12px; margin-top: 10px; }
    .cdog-footer .social-icon a { width: 34px; height: 34px; margin-right: 6px; }
    .cdog-copyright { padding: 14px 0; }
    .cdog-copyright p { font-size: 12px; line-height: 1.8; }
    .cdog-copyright a { white-space: nowrap; }

    /* 顶部导航：小屏让 brand 干净地居左，移动菜单暂未启用 → 隐藏 toggler */
    .cdog-navbar { padding: 6px 0; min-height: 56px; }
    .cdog-navbar .navbar-header {
        justify-content: flex-start !important;
        width: 100%;
        gap: 4px;
    }
    .cdog-navbar .navbar-toggler { display: none; }
    .cdog-navbar .navbar-brand { padding: 0; margin: 0; }
    .cdog-navbar .navbar-brand img { width: 34px !important; height: 34px !important; }
    .cdog-brand-text { font-size: 17px; letter-spacing: 0; margin-left: 6px; }

    /* mobile-menu 折叠后下拉项的内边距与触屏热区 */
    .navbar-expand-lg .navbar-nav .nav-link { padding: 10px 14px !important; }
}

/* 响应式 · 小屏手机 */
@media (max-width: 480px) {
    .cdog-hero-title { font-size: 24px; }
    .cdog-section-title { font-size: 20px; }
    .cdog-detail-title { font-size: 20px; }
    .cdog-hero-stats .num { font-size: 22px; }
    .cdog-hero-stats .label { font-size: 12px; }
    .cdog-tool-card { padding: 16px; }
    .cdog-engine-card,
    .cdog-scene,
    .cdog-format-card,
    .cdog-why-item { padding: 16px; }
    .cdog-btn { padding: 10px 18px; font-size: 14px; }
}
.navbar-expand-lg .navbar-nav .nav-link{
    margin-bottom: 1px!important;
}

/* TL;DR 卡片 */
.cdog-tldr {
    background: var(--cdog-bg-light);
    border-left: 4px solid var(--cdog-primary);
    padding: 16px 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
    font-size: 15px;
    line-height: 1.7;
    color: var(--cdog-ink);
}

.cdog-tldr strong {
    color: var(--cdog-primary-dark);
}

/* 关键事实列表 */
.cdog-fact-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.cdog-fact-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    font-size: 14.5px;
    line-height: 1.7;
    color: var(--cdog-ink-2);
}

.cdog-fact-list li::before {
    content: "•";
    position: absolute;
    left: 8px;
    color: var(--cdog-primary);
    font-weight: bold;
}

/* 对比表 */
.cdog-compare-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
    overflow-x: auto;
    display: block;
}

.cdog-compare-table th,
.cdog-compare-table td {
    padding: 12px 16px;
    border: 1px solid var(--cdog-line);
    text-align: left;
}

.cdog-compare-table th {
    background: var(--cdog-blue);
    color: #FFFFFF;
    font-weight: 600;
}

.cdog-compare-table tr:nth-child(even) {
    background: var(--cdog-bg-light);
}

.cdog-compare-table tr:hover {
    background: var(--cdog-primary-soft);
}

/* 响应式：小屏表格水平滚动 */
@media (max-width: 767.98px) {
    .cdog-compare-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* 实体定义 */
.cdog-entity-definition {
    background: var(--cdog-bg-light);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    border-left: 4px solid var(--cdog-primary);
}

.cdog-entity-definition p {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--cdog-ink);
}