/* ============================================
   亦云科技 · 深色科技工业风设计系统
   ============================================ */

:root {
    /* —— 背景层 —— */
    --bg-base: #070b16;
    --bg-surface: #0d1322;
    --bg-elevated: #141c30;
    --bg-hover: #1a2540;

    /* —— 主色（科技青蓝）—— */
    --primary: #00d4ff;
    --primary-dim: #0a8bb0;
    --primary-glow: rgba(0, 212, 255, 0.12);
    --primary-border: rgba(0, 212, 255, 0.25);

    /* —— 辅助色 —— */
    --accent-green: #2dd4bf;
    --accent-amber: #fbbf24;
    --accent-violet: #818cf8;

    /* —— 文字（提亮以增强深色背景对比度）—— */
    --text-primary: #f0f4fa;
    --text-secondary: #b8c4d6;
    --text-muted: #8896aa;

    /* —— 边框 —— */
    --border: rgba(148, 163, 184, 0.12);
    --border-strong: rgba(148, 163, 184, 0.22);

    /* —— 圆角 —— */
    --radius-sm: 4px;
    --radius: 6px;
    --radius-lg: 10px;

    /* —— 字体 —— */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-base);
    padding-top: 64px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* 背景网格纹理（科技感） */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.025) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-green);
}

::selection {
    background: var(--primary-glow);
    color: var(--text-primary);
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dim);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    background: rgba(7, 11, 22, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    transition: background 0.3s, border-color 0.3s;
}

.navbar.fixed-top {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(7, 11, 22, 0.96);
    border-bottom-color: var(--border-strong);
}

.navbar-brand {
    font-weight: 700;
    color: var(--text-primary) !important;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand i {
    color: var(--primary);
    font-size: 1.3rem;
}

.navbar-brand:hover {
    color: var(--primary) !important;
}

.navbar-toggler {
    border-color: var(--border-strong);
    padding: 6px 10px;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 2px var(--primary-glow);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28232, 237, 246, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: 0.92rem;
    transition: color 0.2s;
    padding: 8px 14px !important;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary) !important;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.nav-link.btn-primary {
    color: var(--bg-base) !important;
    background: var(--primary) !important;
    border: 1px solid var(--primary) !important;
    border-radius: var(--radius) !important;
    padding: 8px 18px !important;
    margin-left: 8px;
    font-weight: 600;
    box-shadow: none;
    transition: all 0.2s;
}

.nav-link.btn-primary:hover {
    background: var(--accent-green) !important;
    border-color: var(--accent-green) !important;
    color: var(--bg-base) !important;
}

.nav-link.btn-secondary {
    color: var(--primary) !important;
    background: transparent !important;
    border: 1px solid var(--primary-border) !important;
    border-radius: var(--radius) !important;
    padding: 7px 14px !important;
    margin-left: 8px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-link.btn-secondary:hover {
    background: var(--primary-glow) !important;
    border-color: var(--primary) !important;
}

/* ============================================
   按钮系统
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.92rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.4;
}

.btn-primary {
    background: var(--primary);
    color: var(--bg-base);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: var(--bg-base);
    box-shadow: 0 0 24px var(--primary-glow);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary-border);
}

.btn-outline:hover {
    background: var(--primary-glow);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
}

/* ============================================
   Section 通用
   ============================================ */
.section {
    padding: 80px 0;
    position: relative;
    z-index: 1;
}

.section-sm {
    padding: 56px 0;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 14px;
}

.section-label::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--primary);
}

.section-title {
    margin-bottom: 12px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1.02rem;
    margin-top: 8px;
}

.section-title.text-center .section-label {
    justify-content: center;
}

.section-title.text-center .section-label::before {
    display: none;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 56px 0 28px;
    position: relative;
    z-index: 1;
}

.footer h5 {
    font-weight: 600;
    margin-bottom: 18px;
    color: var(--text-primary);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.footer-brand {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.footer-brand i {
    color: var(--primary);
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    max-width: 320px;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    font-size: 0.92rem;
    transition: color 0.2s, padding-left 0.2s;
}

.footer-link:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    margin-top: 36px;
    padding-top: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.footer-bottom a {
    color: var(--text-muted);
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* ============================================
   滚动顶部按钮
   ============================================ */
.scroll-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
    font-size: 1.1rem;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary);
    color: var(--bg-base);
    border-color: var(--primary);
}

/* ============================================
   文档页面（深色适配）
   ============================================ */
.docs {
    background: var(--bg-base);
    min-height: 100vh;
    padding: 40px 0;
    position: relative;
    z-index: 1;
}

.docs-layout {
    display: flex;
    gap: 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.docs-sidebar {
    flex: 0 0 260px;
    background: var(--bg-elevated);
    padding: 24px 0;
    border-right: 1px solid var(--border);
}

.docs-menu {
    padding: 0 16px;
}

.docs-menu ul {
    list-style: none;
}

.docs-menu li {
    margin-bottom: 4px;
}

.docs-menu a {
    display: flex;
    align-items: center;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s;
    font-weight: 500;
    font-size: 0.92rem;
}

.docs-menu a:hover {
    background: var(--bg-hover);
    color: var(--primary);
}

.docs-menu a.active {
    background: var(--primary-glow);
    color: var(--primary);
    border-left: 2px solid var(--primary);
}

.docs-menu i {
    margin-right: 10px;
    font-size: 1rem;
    width: 18px;
    text-align: center;
}

.docs-content {
    flex: 1;
    padding: 36px;
    background: var(--bg-surface);
    min-width: 0;
}

.doc-section {
    margin-bottom: 36px;
}

.doc-section h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.doc-section p {
    margin-bottom: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.property_name {
    font-weight: 600;
    margin-right: 8px;
    color: var(--primary);
    font-family: var(--font-mono);
    font-size: 0.92rem;
}

.doc-detail {
    background: var(--bg-elevated);
    border-radius: var(--radius);
    padding: 22px;
    margin-top: 18px;
    border: 1px solid var(--border);
}

.doc-detail h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 18px 0 12px;
}

.doc-detail h4:first-child {
    margin-top: 0;
}

.doc-detail p {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.doc-detail img {
    max-width: 100%;
    border-radius: var(--radius);
    margin: 14px 0;
    border: 1px solid var(--border);
}

.doc-detail a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.doc-detail a:hover {
    color: var(--accent-green);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 992px) {
    .docs-layout {
        flex-direction: column;
    }

    .docs-sidebar {
        flex: none;
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .docs-menu {
        display: flex;
        overflow-x: auto;
        padding: 0 16px;
    }

    .docs-menu ul {
        display: flex;
        gap: 6px;
    }

    .docs-menu li {
        margin-bottom: 0;
    }

    .docs-menu a {
        white-space: nowrap;
    }

    .docs-content {
        padding: 28px;
    }

    .navbar-collapse {
        background: var(--bg-surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        margin-top: 10px;
        padding: 12px;
    }

    .nav-link.btn-primary,
    .nav-link.btn-secondary {
        margin-left: 0;
        margin-top: 6px;
        display: block;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 56px 0;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    .docs {
        padding: 20px 0;
    }

    .docs-content {
        padding: 20px;
    }

    .doc-detail {
        padding: 18px;
    }

    .footer {
        padding: 40px 0 24px;
    }
}