/* ============================================================
   EonAuto 一祺航 · 零碳智能 · 官网样式
   深色碳主题 + 玻璃质感 + 行业入口卡片
   ============================================================ */

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-green: #10b981;
    --accent-cyan: #06b6d4;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --gradient-main: linear-gradient(135deg, #0a0e1a 0%, #0f1a2e 50%, #0a1628 100%);
    --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.08);
    --radius-card: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ---------- 背景装饰 ---------- */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 20%, rgba(16, 185, 129, 0.03) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(16, 185, 129, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(16, 185, 129, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 24px;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.navbar .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.navbar .logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.navbar .logo-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: -2px;
}

.navbar .nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar .nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.navbar .nav-links a:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

/* ---------- Hero 区域 ---------- */
.hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 100px;
    font-size: 13px;
    color: var(--accent-green);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #e2e8f0 0%, #10b981 50%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    font-size: clamp(18px, 2.5vw, 28px);
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 12px;
}

.hero .desc {
    font-size: clamp(14px, 1.5vw, 18px);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.8;
}

.hero .desc strong {
    color: var(--accent-green);
    font-weight: 600;
}

/* ---------- 知行动画标记 ---------- */
.hero .zhixing {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    font-size: 14px;
    color: var(--text-muted);
}

.hero .zhixing .tag {
    padding: 4px 14px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
}

.hero .zhixing .tag.learn {
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid rgba(6, 182, 212, 0.25);
    color: var(--accent-cyan);
}

.hero .zhixing .tag.do {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.25);
    color: var(--accent-green);
}

.hero .zhixing .arrow {
    color: var(--text-muted);
    font-size: 18px;
}

/* ---------- 行业入口卡片网格 ---------- */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 80px;
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    padding: 60px 24px 12px;
    position: relative;
    z-index: 1;
}

.section-title h2 {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 700;
    margin-bottom: 8px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 15px;
    max-width: 500px;
    margin: 0 auto;
}

/* ---------- 行业卡片 ---------- */
.industry-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    padding: 32px 24px;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.industry-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: var(--transition);
}

.industry-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-glow), 0 8px 32px rgba(0, 0, 0, 0.3);
}

.industry-card:hover::before {
    opacity: 1;
}

.industry-card .icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 16px;
    transition: var(--transition);
}

.industry-card:hover .icon-wrap {
    transform: scale(1.08);
}

.industry-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.industry-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.industry-card .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.industry-card .tags span {
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 11px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

/* 各行业卡片颜色 */
.card-traffic .icon-wrap { background: rgba(59, 130, 246, 0.15); }
.card-traffic::before { background: linear-gradient(90deg, #3b82f6, #06b6d4); }
.card-traffic:hover { border-color: rgba(59, 130, 246, 0.3); }

.card-industrial .icon-wrap { background: rgba(245, 158, 11, 0.15); }
.card-industrial::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.card-industrial:hover { border-color: rgba(245, 158, 11, 0.3); }

.card-mining .icon-wrap { background: rgba(139, 92, 246, 0.15); }
.card-mining::before { background: linear-gradient(90deg, #8b5cf6, #3b82f6); }
.card-mining:hover { border-color: rgba(139, 92, 246, 0.3); }

.card-building .icon-wrap { background: rgba(236, 72, 153, 0.15); }
.card-building::before { background: linear-gradient(90deg, #ec4899, #f59e0b); }
.card-building:hover { border-color: rgba(236, 72, 153, 0.3); }

.card-robot .icon-wrap { background: rgba(6, 182, 212, 0.15); }
.card-robot::before { background: linear-gradient(90deg, #06b6d4, #10b981); }
.card-robot:hover { border-color: rgba(6, 182, 212, 0.3); }

.card-carbon .icon-wrap { background: rgba(16, 185, 129, 0.15); }
.card-carbon::before { background: linear-gradient(90deg, #10b981, #8b5cf6); }
.card-carbon:hover { border-color: rgba(16, 185, 129, 0.3); }

/* ---------- 分层架构区 ---------- */
.architecture {
    position: relative;
    z-index: 1;
    padding: 80px 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.arch-stack {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-top: 48px;
}

.arch-layer {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 28px;
    border: 1px solid var(--border-glass);
    border-radius: 0;
    transition: var(--transition);
    position: relative;
}

.arch-layer:first-child {
    border-radius: var(--radius-card) var(--radius-card) 0 0;
}

.arch-layer:last-child {
    border-radius: 0 0 var(--radius-card) var(--radius-card);
}

.arch-layer + .arch-layer {
    margin-top: -1px;
}

.arch-layer:hover {
    background: var(--bg-glass);
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateX(8px);
}

.arch-layer .layer-num {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    flex-shrink: 0;
}

.arch-layer .layer-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.arch-layer .layer-info {
    flex: 1;
}

.arch-layer .layer-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 2px;
}

.arch-layer .layer-info p {
    font-size: 13px;
    color: var(--text-muted);
}

.layer-sense .layer-num { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.layer-collect .layer-num { background: rgba(139, 92, 246, 0.15); color: #8b5cf6; }
.layer-manage .layer-num { background: rgba(6, 182, 212, 0.15); color: #06b6d4; }
.layer-analyze .layer-num { background: rgba(16, 185, 129, 0.15); color: #10b981; }

/* ---------- 服务体系 ---------- */
.services {
    position: relative;
    z-index: 1;
    padding: 60px 24px 80px;
    max-width: 1100px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 40px;
}

.service-item {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition);
}

.service-item:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.12);
}

.service-item .icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.service-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.service-item p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ---------- 行业×服务矩阵 ---------- */
.matrix-section {
    position: relative;
    z-index: 1;
    padding: 0 24px 80px;
    max-width: 1100px;
    margin: 0 auto;
    overflow-x: auto;
}

.matrix-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 2px;
    margin-top: 40px;
    min-width: 700px;
}

.matrix-table th,
.matrix-table td {
    padding: 10px 14px;
    text-align: center;
    font-size: 13px;
    border-radius: var(--radius-sm);
}

.matrix-table th {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    font-weight: 600;
    white-space: nowrap;
}

.matrix-table th:first-child {
    text-align: left;
    min-width: 80px;
}

.matrix-table td {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
    transition: var(--transition);
}

.matrix-table td.has {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
}

.matrix-table td:hover {
    background: var(--bg-glass);
    transform: scale(1.02);
}

/* ---------- 底部 ---------- */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-glass);
    padding: 40px 24px;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 13px;
}

.footer a {
    color: var(--accent-green);
    text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .navbar {
        padding: 12px 16px;
    }

    .navbar .nav-links a {
        padding: 6px 12px;
        font-size: 13px;
    }

    .hero {
        padding: 100px 16px 60px;
    }

    .industry-grid {
        grid-template-columns: 1fr;
        padding: 0 16px 60px;
        gap: 16px;
    }

    .architecture {
        padding: 60px 16px;
    }

    .arch-layer {
        padding: 16px 20px;
        gap: 16px;
    }

    .services {
        padding: 40px 16px 60px;
    }

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

    .section-title {
        padding: 40px 16px 8px;
    }
}

@media (max-width: 480px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .navbar .logo-text {
        font-size: 16px;
    }

    .navbar .nav-links a {
        font-size: 12px;
        padding: 4px 10px;
    }
}