:root {
    --primary-cool: #4f46e5;
    --secondary-cool: #06b6d4;
    --bg-cool: #f8fafc;
    --surface-cool: #ffffff;
    --text-cool-main: #0f172a;
    --text-cool-muted: #64748b;
    --border-cool: #e2e8f0;
    --footer-bg: #f1f5f9;
    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 20px 40px -15px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 40px -15px rgba(15, 23, 42, 0.3);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    color: var(--text-cool-main);
    background-color: var(--bg-cool);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* ===== 头部导航 ===== */
header {
    border-bottom: 1px solid var(--border-cool);
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--text-cool-main);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo svg {
    width: 32px;
    height: 32px;
    fill: none;
    stroke: var(--primary-cool);
    color: var(--primary-cool);
}

.nav-links a {
    color: var(--text-cool-muted);
    text-decoration: none;
    margin-left: 20px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 20px;
}

.nav-links a:hover {
    color: var(--primary-cool);
    background: rgba(79, 70, 229, 0.04);
}

.nav-links a.active-cool {
    color: var(--primary-cool);
    background: rgba(79, 70, 229, 0.08);
}

/* ===== 下载页主视觉 ===== */
.dl-hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px 40px;
    text-align: center;
}

.dl-hero h1 {
    font-size: 40px;
    font-weight: 800;
    color: var(--text-cool-main);
    letter-spacing: -1px;
    margin-bottom: 16px;
    line-height: 1.2;
}

.dl-hero h1 span {
    background: linear-gradient(135deg, var(--primary-cool) 0%, var(--secondary-cool) 80%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dl-hero p {
    font-size: 16px;
    color: var(--text-cool-muted);
    max-width: 650px;
    margin: 0 auto;
}

/* ===== 下载卡片网格 ===== */
.dl-grid-layout {
    max-width: 1200px;
    margin: 0 auto 60px;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.platform-card {
    background: var(--surface-cool);
    border: 1px solid var(--border-cool);
    border-radius: var(--radius-lg);
    padding: 35px 24px;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-sm);
}

.platform-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary-cool);
    box-shadow: 0 20px 40px -15px rgba(79, 70, 229, 0.12);
}

.card-svg-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 24px;
    fill: var(--primary-cool);
    background: rgba(79, 70, 229, 0.06);
    padding: 10px;
    border-radius: 12px;
}

.platform-card h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--text-cool-main);
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}

.platform-card p {
    font-size: 14px;
    color: var(--text-cool-muted);
    margin-bottom: 24px;
    flex-grow: 1;
    line-height: 1.6;
}

.btn-dl-action {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, var(--primary-cool) 0%, #3b82f6 100%);
    color: #ffffff;
    text-decoration: none;
    text-align: center;
    padding: 12px 16px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 15px;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
    letter-spacing: 0.2px;
}

.btn-dl-action:hover {
    opacity: 0.92;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
}

/* ===== 通用面板标题 ===== */
.panel-heading {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-cool-main);
    margin-bottom: 30px;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.panel-heading::before {
    content: '';
    width: 6px;
    height: 24px;
    background: var(--primary-cool);
    border-radius: 3px;
    flex-shrink: 0;
}

/* ===== 完整性校验表格 ===== */
.integrity-audit-section {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 20px;
}

.table-responsive-container {
    width: 100%;
    overflow-x: auto;
    background: var(--surface-cool);
    border: 1px solid var(--border-cool);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14.5px;
    min-width: 700px;
}

th {
    background: var(--bg-cool);
    padding: 18px 24px;
    font-weight: 700;
    color: var(--text-cool-main);
    border-bottom: 1px solid var(--border-cool);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

td {
    padding: 18px 24px;
    color: var(--text-cool-muted);
    border-bottom: 1px solid var(--border-cool);
    vertical-align: middle;
}

tr:last-child td {
    border-bottom: none;
}

.hash-code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    background: var(--bg-cool);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-cool-main);
    border: 1px solid var(--border-cool);
    word-break: break-all;
    display: inline-block;
    max-width: 320px;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #10b981;
    font-weight: 700;
    white-space: nowrap;
}

.status-pill::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #10b981;
    border-radius: 50%;
}

/* ===== 版本飞行日志创意版块 ===== */
.flight-log-section {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 20px;
}

.flight-log-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.flight-log-entry {
    background: var(--surface-cool);
    border: 1px solid var(--border-cool);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.flight-log-entry::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-cool), var(--secondary-cool));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.flight-log-entry:hover {
    border-color: var(--primary-cool);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.flight-log-entry:hover::before {
    opacity: 1;
}

.log-version {
    font-size: 17px;
    font-weight: 800;
    color: var(--primary-cool);
    margin-bottom: 10px;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.log-version::after {
    content: '✈️';
    font-size: 16px;
    opacity: 0.6;
}

.flight-log-entry p {
    font-size: 14px;
    color: var(--text-cool-muted);
    line-height: 1.6;
    margin: 0;
}

.flight-log-more {
    text-align: center;
    font-size: 15px;
    color: var(--text-cool-muted);
}

.flight-log-more a {
    color: var(--primary-cool);
    text-decoration: none;
    font-weight: 700;
    margin: 0 4px;
    transition: var(--transition);
}

.flight-log-more a:hover {
    color: var(--secondary-cool);
    text-decoration: underline;
}
/* ===== GitHub 开源工坊创意版块 ===== */
.github-workshop-section {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 20px;
}

.github-workshop-subtitle {
    font-size: 16px;
    color: var(--text-cool-muted);
    margin-top: -20px;
    margin-bottom: 36px;
    max-width: 650px;
    line-height: 1.6;
}

.github-workshop-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
}

.github-card-main {
    background: linear-gradient(160deg, #f8fafc 0%, #eef2ff 100%);
    border: 1px solid var(--border-cool);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.github-card-main:hover {
    border-color: var(--primary-cool);
    box-shadow: var(--shadow-md);
}

.github-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.github-icon {
    width: 42px;
    height: 42px;
    fill: var(--text-cool-main);
    flex-shrink: 0;
}

.github-card-header h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-cool-main);
    margin-bottom: 2px;
    letter-spacing: -0.3px;
}

.github-repo-name {
    font-family: 'SF Mono', 'Cascadia Code', monospace;
    font-size: 13px;
    color: var(--primary-cool);
    font-weight: 600;
}

.github-card-main > p {
    font-size: 14px;
    color: var(--text-cool-muted);
    line-height: 1.7;
    margin-bottom: 24px;
    flex-grow: 1;
}

.github-stats-row {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.github-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-cool-muted);
    background: var(--surface-cool);
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-cool);
}

.github-stat strong {
    color: var(--text-cool-main);
    font-weight: 800;
}

.stat-star { color: #f59e0b; font-size: 15px; }
.stat-fork { color: var(--primary-cool); font-size: 15px; font-weight: 700; }
.stat-issue { color: #10b981; font-size: 15px; font-weight: 700; }

.btn-github-visit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #0f172a;
    color: #ffffff;
    text-decoration: none;
    padding: 13px 24px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 15px;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.08);
    align-self: flex-start;
}

.btn-github-visit:hover {
    background: #1e293b;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.25);
}

.github-card-contribute {
    background: var(--surface-cool);
    border: 1px solid var(--border-cool);
    border-radius: var(--radius-lg);
    padding: 30px 26px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.github-card-contribute:hover {
    border-color: var(--secondary-cool);
    box-shadow: var(--shadow-md);
}

.github-card-contribute h4 {
    font-size: 18px;
    font-weight: 800;
    color: var(--text-cool-main);
    margin-bottom: 20px;
    letter-spacing: -0.3px;
}

.contribute-flow {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 20px;
    flex-grow: 1;
}

.contribute-flow li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px;
    background: var(--bg-cool);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: var(--transition);
}

.contribute-flow li:hover {
    border-color: var(--border-cool);
    background: var(--surface-cool);
}

.flow-num {
    font-size: 20px;
    font-weight: 900;
    color: var(--primary-cool);
    opacity: 0.25;
    line-height: 1;
    flex-shrink: 0;
    min-width: 28px;
}

.contribute-flow li strong {
    display: block;
    font-size: 14px;
    color: var(--text-cool-main);
    margin-bottom: 2px;
}

.contribute-flow li p {
    font-size: 13px;
    color: var(--text-cool-muted);
    margin: 0;
}

.github-note {
    font-size: 13px;
    color: var(--text-cool-muted);
    line-height: 1.6;
    margin: 0;
    padding-top: 14px;
    border-top: 1px solid var(--border-cool);
}

/* 响应式：GitHub 工坊 */
@media (max-width: 768px) {
    .github-workshop-grid {
        grid-template-columns: 1fr;
    }

    .github-card-main {
        padding: 28px 22px;
    }

    .github-stats-row {
        gap: 12px;
    }

    .github-stat {
        padding: 6px 12px;
        font-size: 13px;
    }

    .btn-github-visit {
        width: 100%;
        justify-content: center;
    }

    .github-card-contribute {
        padding: 24px 20px;
    }

    .github-card-header h3 {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .github-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .github-stats-row {
        flex-direction: column;
    }
}
/* ===== 页脚 ===== */
.new-footer-cool {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border-cool);
    padding: 80px 20px 40px;
    color: var(--text-cool-main);
}

.footer-premium-layout {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    padding-bottom: 50px;
    border-bottom: 1px solid var(--border-cool);
}

.footer-brand-side h4 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-cool-main);
}

.footer-brand-side p {
    font-size: 14px;
    color: var(--text-cool-muted);
    margin-bottom: 24px;
    max-width: 380px;
    line-height: 1.7;
}

.footer-status-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-cool);
    border: 1px solid var(--border-cool);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 12px;
    color: #10b981;
    font-weight: 700;
}

.footer-status-tag::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.footer-links-side {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.footer-nav-col h5 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-cool-main);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.footer-nav-col ul {
    list-style: none;
}

.footer-nav-col ul li {
    margin-bottom: 10px;
}

.footer-nav-col ul li a {
    font-size: 14px;
    color: var(--text-cool-muted);
    text-decoration: none;
    transition: color 0.15s;
}

.footer-nav-col ul li a:hover {
    color: var(--primary-cool);
}

.footer-bottom-bar {
    max-width: 1200px;
    margin: 40px auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-cool-muted);
    flex-wrap: wrap;
    gap: 15px;
}

.github-sha-badge {
    font-family: 'SF Mono', 'Cascadia Code', monospace;
    background: var(--surface-cool);
    padding: 4px 12px;
    border-radius: 4px;
    border: 1px solid var(--border-cool);
    color: var(--text-cool-main);
    font-size: 12px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 992px) {
    .footer-premium-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .dl-hero h1 {
        font-size: 32px;
    }

    .panel-heading {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    .footer-links-side {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom-bar {
        flex-direction: column;
        text-align: center;
    }

    .nav-links {
        display: none;
    }

    .dl-hero h1 {
        font-size: 28px;
    }

    .dl-grid-layout {
        grid-template-columns: 1fr;
    }

    .flight-log-grid {
        grid-template-columns: 1fr;
    }

    .table-responsive-container {
        border-radius: 12px;
    }

    th, td {
        padding: 14px 16px;
    }
}

@media (max-width: 480px) {
    .platform-card {
        padding: 28px 20px;
    }

    .dl-hero {
        padding: 40px 16px 30px;
    }

    .hash-code {
        max-width: 200px;
        font-size: 12px;
    }
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
    .platform-card:hover,
    .btn-dl-action:hover,
    .flight-log-entry:hover {
        transform: none;
    }

    .footer-status-tag::before {
        animation: none;
    }

    * {
        transition-duration: 0.01ms !important;
    }
}