/* Open-Crab 独立样式 - 与哈呀酷区分（更温暖的色调） */
:root {
    --oc-primary: #c14a3a;
    /* 深红/暖红 */
    --oc-primary-light: #d96554;
    --oc-bg: #faf8f3;
    /* 温暖米白背景 */
    --oc-text: #1a1a1a;
    --oc-text-light: #5a5a5a;
    --oc-accent: #d97a3e;
    /* 暖橙强调色 */
    --oc-border: #f0e0d0;

    --font-serif-zh: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "宋体", serif;
    --font-sans-zh: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans-zh);
    background: var(--oc-bg);
    color: var(--oc-text);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--oc-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-bottom 0.2s;
}

a:hover {
    border-bottom: 1px solid var(--oc-primary);
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Hero 主视觉区 */
.oc-hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;

}

.oc-hero h1 {
    font-family: var(--font-serif-zh);
    font-size: 3.5rem;
    color: var(--oc-primary);
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.oc-hero .subtitle {
    font-size: 1.5rem;
    color: var(--oc-text);
    font-weight: 300;
    margin-bottom: 0.5rem;
}

.oc-hero .tagline {
    font-family: var(--font-serif-zh);
    font-size: 1.2rem;
    color: var(--oc-text-light);
    margin-bottom: 0.5rem;
}

.oc-hero .tagline2 {
    font-family: var(--font-serif-zh);
    font-size: 1.1rem;
    color: var(--oc-text-light);
    margin-bottom: 3rem;
    line-height: 2;
}

/* 主视觉区分隔线 */
.hero-divider {
    width: 80px;
    height: 2px;
    background: var(--oc-accent);
    margin: 1.5rem auto;
    border: none;
}

/* 跨站点导流（三网站卡片） */
.oc-cross-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 600px;
    margin: 0 auto;
}

.oc-cross-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: white;
    border-radius: 8px;
    border: 2px solid var(--oc-border);
    transition: all 0.2s;
}

.oc-cross-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(193, 74, 58, 0.15);
    border-color: var(--oc-primary);
    border-bottom: 2px solid var(--oc-primary);
}

.oc-cross-card-active {
    background: linear-gradient(135deg, rgba(193, 74, 58, 0.05), rgba(217, 122, 62, 0.05));
    border-color: var(--oc-primary);
}

.oc-cross-emoji {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.oc-cross-name {
    font-family: var(--font-serif-zh);
    font-size: 1.1rem;
    color: var(--oc-primary);
    font-weight: 500;
}

/* 弹窗强调文字 */
.modal-emphasis-text {
    text-align: center;
    font-weight: 500;
    color: var(--oc-primary);
}

/* 页脚跨站点导流 */
.oc-footer-cross {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--oc-border);
    color: var(--oc-text-light);
    font-size: 0.9rem;
}

.oc-footer-link {
    color: var(--oc-primary);
    font-weight: 500;
    margin: 0 0.5rem;
}

.oc-footer-sep {
    color: var(--oc-text-light);
    margin: 0 0.25rem;
}

/* CTA 按钮 */
.cta-button {
    display: inline-block;
    padding: 1.2rem 3.5rem;
    background: var(--oc-primary);
    color: white !important;
    border: none !important;
    border-radius: 6px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(193, 74, 58, 0.25);
}

.cta-button:hover {
    background: var(--oc-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(193, 74, 58, 0.35);
    border: none !important;
}

.cta-hint {
    margin-top: 1.5rem;
    color: var(--oc-text-light);
    font-size: 0.95rem;
}

/* 内容区 */
.section {
    padding: 4rem 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-serif-zh);
    font-size: 2rem;
    color: var(--oc-primary);
    text-align: center;
    margin-bottom: 2rem;
}

.section-content {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--oc-text);
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

/* 引用块 */
.quote-block {
    background: white;
    border-radius: 8px;
    padding: 2.5rem;
    margin: 3rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--oc-accent);
    font-size: 1.05rem;
    line-height: 1.9;
    text-align: center;
}

.quote-block strong {
    color: var(--oc-primary);
    font-size: 1.15rem;
}

/* 分隔线 */
.divider {
    width: 60px;
    height: 2px;
    background: var(--oc-accent);
    margin: 3rem auto;
    border: none;
}

/* 页脚 */
.oc-footer {
    padding: 3rem 1.5rem 2rem;
    background: white;
    text-align: center;
}

.oc-footer-info {
    color: var(--oc-text-light);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.oc-footer-info p {
    margin: 0.25rem 0;
}

.oc-footer-cross-link {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--oc-border);
    color: var(--oc-text-light);
    font-size: 0.9rem;
}

.oc-footer-cross-link a {
    color: var(--oc-primary);
    font-weight: 500;
}


.oc-footer-beian {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--color-border);
    color: var(--color-text-light);
    font-size: 0.85rem;
    font-family: var(--font-sans-en), monospace;
    text-align: center;
}

.oc-footer-beian p {
    display: inline;
}

.oc-footer-beian p+p::before {
    content: " · ";
    margin: 0 0.5rem;
}

.oc-footer-beian {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--oc-border);
    color: var(--oc-text-light);
    font-size: 0.85rem;
    font-family: var(--font-sans-zh), monospace;
    text-align: center;
}

.oc-footer-beian p {
    display: inline;
}

.oc-footer-beian p+p::before {
    content: " · ";
    margin: 0 0.5rem;
}

/* 弹窗 */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 3rem 2.5rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
}

.modal-title {
    font-family: var(--font-serif-zh);
    font-size: 1.8rem;
    color: var(--oc-primary);
    text-align: center;
    margin-bottom: 1.5rem;
}

.modal-text {
    color: var(--oc-text);
    line-height: 1.9;
    margin-bottom: 1rem;
}

.modal-text strong {
    color: var(--oc-primary);
}

.modal-list {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--oc-text);
}

.modal-list li {
    margin-bottom: 0.5rem;
}

.modal-section {
    background: #fff8f3;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.modal-back {
    display: block;
    width: 100%;
    padding: 0.75rem;
    margin-top: 1.5rem;
    background: var(--oc-bg);
    color: var(--oc-primary);
    border: 1px solid var(--oc-border) !important;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-back:hover {
    background: var(--oc-primary);
    color: white !important;
    border-color: var(--oc-primary) !important;
}

/* 移动端 */
@media (max-width: 600px) {
    .oc-hero h1 {
        font-size: 2.5rem;
    }

    .oc-hero .subtitle {
        font-size: 1.2rem;
    }

    .oc-hero .tagline {
        font-size: 1rem;
    }

    .modal-content {
        padding: 2rem 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }
}




/* ========== Logo 显示样式 ========== */
.oc-logo-section {
    text-align: center;
    padding: 1rem 0;
}

.oc-logo-large {
    width: 100px;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* ========== 顶部导航栏 ========== */
.oc-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 250, 245, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--oc-border);
    padding: 0.75rem 1.5rem;
}

.oc-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.oc-header-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--oc-primary) !important;
    border: none !important;
    font-family: var(--font-serif-zh);
    font-size: 1.15rem;
    font-weight: 500;
}

.oc-header-brand:hover {
    border: none !important;
}

.oc-header-logo {
    width: 32px;
    height: 32px;
    display: block;
}

.oc-header-name {
    letter-spacing: 0.05em;
}

.oc-header-nav {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.oc-header-link {
    color: var(--oc-text) !important;
    border: none !important;
    padding: 0.5rem 0.9rem;
    border-radius: 4px;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.oc-header-link:hover {
    background: rgba(193, 74, 58, 0.08);
    color: var(--oc-primary) !important;
    border: none !important;
}

.oc-header-link-active {
    color: var(--oc-primary) !important;
    background: rgba(193, 74, 58, 0.08);
}

/* ========== 子标题 ========== */
.section-subtitle {
    text-align: center;
    color: var(--oc-text-light);
    font-size: 1.05rem;
    margin-bottom: 2.5rem;
    margin-top: -1rem;
}

/* ========== 四大能力卡片网格 ========== */
.oc-capability-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.oc-capability-card {
    display: block;
    background: white;
    border-radius: 10px;
    padding: 2rem 1.75rem;
    border: 2px solid var(--oc-border);
    transition: all 0.2s;
    color: var(--oc-text) !important;
    border-bottom: 2px solid var(--oc-border) !important;
}

.oc-capability-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(193, 74, 58, 0.15);
    border-color: var(--oc-primary) !important;
    border-bottom: 2px solid var(--oc-primary) !important;
}

.oc-capability-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.oc-capability-title {
    font-family: var(--font-serif-zh);
    font-size: 1.3rem;
    color: var(--oc-primary);
    margin-bottom: 0.75rem;
}

.oc-capability-desc {
    color: var(--oc-text-light);
    line-height: 1.9;
    font-size: 0.98rem;
}

/* ========== 跨端平台卡片 ========== */
.oc-platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    max-width: 1000px;
    margin: 0 auto;
}

.oc-platform-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem 1rem;
    text-align: center;
    border: 2px solid var(--oc-border);
    transition: all 0.2s;
}

.oc-platform-card:hover {
    border-color: var(--oc-primary);
    transform: translateY(-2px);
}

.oc-platform-emoji {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.oc-platform-name {
    font-family: var(--font-serif-zh);
    font-size: 1.05rem;
    color: var(--oc-primary);
    margin-bottom: 0.4rem;
}

.oc-platform-desc {
    font-size: 0.85rem;
    color: var(--oc-text-light);
    line-height: 1.6;
}

/* ========== 引用区 ========== */
.oc-quote-section {
    padding: 2rem 1.5rem;
}

.quote-block p {
    margin: 0.5rem 0;
}

.quote-block p:first-child {
    margin-bottom: 1rem;
}

/* ========== CTA 卡片网格 ========== */
.oc-cta-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.oc-cta-card {
    display: block;
    background: white;
    border-radius: 8px;
    padding: 1.75rem 1.5rem;
    border: 2px solid var(--oc-border);
    transition: all 0.2s;
    color: var(--oc-text) !important;
    border-bottom: 2px solid var(--oc-border) !important;
}

.oc-cta-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(193, 74, 58, 0.12);
    border-color: var(--oc-primary) !important;
    border-bottom: 2px solid var(--oc-primary) !important;
}

.oc-cta-card h3 {
    font-family: var(--font-serif-zh);
    color: var(--oc-primary);
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}

.oc-cta-card p {
    color: var(--oc-text-light);
    font-size: 0.95rem;
}

/* ========== 内容页面布局 ========== */
.oc-page-header {
    background: white;
    padding: 4rem 1.5rem 3rem;
    text-align: center;
    border-bottom: 1px solid var(--oc-border);
}

.oc-page-header h1 {
    font-family: var(--font-serif-zh);
    font-size: 2.5rem;
    color: var(--oc-primary);
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.oc-page-header .oc-page-subtitle {
    color: var(--oc-text-light);
    font-size: 1.15rem;
    max-width: 700px;
    margin: 0 auto;
}

.oc-page-header .oc-page-eyebrow {
    display: inline-block;
    color: var(--oc-accent);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* ========== 技术能力详细区块 ========== */
.oc-feature-block {
    padding: 3rem 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.oc-feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 4rem;
}

.oc-feature-row-reverse {
    direction: rtl;
}

.oc-feature-row-reverse > * {
    direction: ltr;
}

.oc-feature-visual {
    background: linear-gradient(135deg, rgba(193, 74, 58, 0.05), rgba(217, 122, 62, 0.08));
    border-radius: 12px;
    padding: 2.5rem 2rem;
    border: 2px solid var(--oc-border);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--oc-text-light);
    line-height: 1.8;
}

.oc-feature-visual strong {
    color: var(--oc-primary);
}

.oc-feature-eyebrow {
    color: var(--oc-accent);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.oc-feature-title {
    font-family: var(--font-serif-zh);
    font-size: 1.8rem;
    color: var(--oc-primary);
    margin-bottom: 1rem;
}

.oc-feature-text {
    color: var(--oc-text);
    line-height: 1.9;
    font-size: 1.02rem;
    margin-bottom: 1rem;
}

.oc-feature-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
}

.oc-feature-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.6rem;
    color: var(--oc-text);
    line-height: 1.8;
}

.oc-feature-list li::before {
    content: "✓";
    color: var(--oc-primary);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* ========== 架构分层图 ========== */
.oc-arch-diagram {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    border: 2px solid var(--oc-border);
    max-width: 900px;
    margin: 2rem auto;
}

.oc-arch-layer {
    background: linear-gradient(135deg, rgba(193, 74, 58, 0.04), rgba(217, 122, 62, 0.06));
    border: 1px solid var(--oc-border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.oc-arch-layer-name {
    font-family: var(--font-serif-zh);
    color: var(--oc-primary);
    font-weight: 500;
}

.oc-arch-layer-desc {
    color: var(--oc-text-light);
    font-size: 0.9rem;
}

/* ========== 卡片网格（用于特性/价值列表） ========== */
.oc-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.oc-feature-card {
    background: white;
    border-radius: 10px;
    padding: 1.75rem 1.5rem;
    border: 2px solid var(--oc-border);
    transition: all 0.2s;
}

.oc-feature-card:hover {
    border-color: var(--oc-primary);
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(193, 74, 58, 0.1);
}

.oc-feature-card-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.oc-feature-card-title {
    font-family: var(--font-serif-zh);
    font-size: 1.15rem;
    color: var(--oc-primary);
    margin-bottom: 0.5rem;
}

.oc-feature-card-text {
    color: var(--oc-text-light);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ========== 步骤/流程列表 ========== */
.oc-steps {
    max-width: 800px;
    margin: 0 auto;
    counter-reset: step;
}

.oc-step {
    background: white;
    border-radius: 10px;
    padding: 1.5rem 1.75rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--oc-primary);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
    counter-increment: step;
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
}

.oc-step::before {
    content: counter(step);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--oc-primary);
    color: white;
    border-radius: 50%;
    font-family: var(--font-serif-zh);
    font-weight: 600;
    flex-shrink: 0;
}

.oc-step-title {
    font-family: var(--font-serif-zh);
    color: var(--oc-primary);
    margin-bottom: 0.4rem;
    font-size: 1.1rem;
}

.oc-step-text {
    color: var(--oc-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========== 代码块 ========== */
.oc-code-block {
    background: #2a1f1a;
    color: #fff5e6;
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    font-family: "SF Mono", Monaco, Consolas, monospace;
    font-size: 0.88rem;
    line-height: 1.7;
    overflow-x: auto;
    margin: 1.5rem 0;
    max-width: 900px;
}

.oc-code-block .oc-code-comment {
    color: #d97a3e;
    font-style: italic;
}

.oc-code-block .oc-code-key {
    color: #f4a582;
}

/* ========== 标签徽章 ========== */
.oc-badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.oc-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(193, 74, 58, 0.08);
    color: var(--oc-primary);
    border-radius: 4px;
    font-size: 0.85rem;
    border: 1px solid rgba(193, 74, 58, 0.2);
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
    .oc-capability-grid {
        grid-template-columns: 1fr;
    }

    .oc-platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .oc-feature-grid {
        grid-template-columns: 1fr;
    }

    .oc-feature-row {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .oc-cta-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .oc-header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .oc-header-nav {
        width: 100%;
        overflow-x: auto;
    }

    .oc-platform-grid {
        grid-template-columns: 1fr;
    }

    .oc-arch-layer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }

    .oc-page-header h1 {
        font-size: 2rem;
    }
}

.oc-logo-small {
    width: 50px;
    height: auto;
    display: block;
    margin: 0 auto 1rem;
}

.oc-header-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}