/* ==========================================================================
   components.css — 可复用组件：导航、卡片、按钮、证书轮播、弹窗
   ========================================================================== */

/* --- 导航栏 --- */
.nav {
    position: fixed;
    width: 100%;
    z-index: 50;
    transition: background var(--transition-base), box-shadow var(--transition-base);
    height: var(--nav-height);
}

.nav.scrolled {
    background: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-nav);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
}

.nav-links {
    display: none;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    font-size: 0.9375rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-cyan);
}

.nav-link.active {
    font-weight: 600;
}

.nav-lang {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid var(--color-border);
}

.lang-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-dim);
    transition: color var(--transition-fast);
}

.lang-btn:hover { color: var(--color-white); }
.lang-btn.active { color: var(--color-cyan); font-weight: 700; }

/* 移动菜单按钮 */
.nav-mobile-btn {
    display: block;
    color: var(--color-text);
}
.nav-mobile-btn:hover { color: var(--color-white); }
.nav-mobile-btn svg { width: 1.5rem; height: 1.5rem; }

/* 移动菜单 */
.nav-mobile {
    display: none;
    padding-bottom: 1rem;
}
.nav-mobile.open { display: block; }
.nav-mobile .nav-link {
    display: block;
    padding: 0.5rem 0.75rem;
}
.nav-mobile .nav-lang {
    margin-left: 0;
    padding-left: 0;
    padding-top: 0.5rem;
    border-left: none;
    border-top: 1px solid var(--color-border);
    gap: 0.5rem;
}
.nav-mobile .lang-btn { padding: 0.25rem 0.75rem; }

@media (min-width: 768px) {
    .nav-links { display: flex; }
    .nav-mobile-btn { display: none; }
}

/* --- 卡片 --- */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
}

/* 卡片光晕效果 */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
    background: radial-gradient(
        600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(34, 211, 238, 0.06),
        transparent 40%
    );
}

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

/* 产品卡片图标容器 */
.card-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.75rem;
}

.card-icon.cyan { background: var(--color-cyan-dim); }
.card-icon.purple { background: var(--color-purple-dim); }

.card-icon svg {
    width: 1.5rem;
    height: 1.5rem;
}

.card-icon.cyan svg { color: var(--color-cyan); }
.card-icon.purple svg { color: var(--color-purple); }

/* 特征列表项 */
.feature-item {
    display: flex;
    align-items: center;
}

.feature-item svg {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.feature-item.cyan svg { color: var(--color-cyan); }
.feature-item.purple svg { color: var(--color-purple); }

/* --- 按钮 --- */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-weight: 700;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    text-align: center;
}

.btn-primary {
    background: var(--color-cyan);
    color: var(--color-bg-deep);
}

.btn-primary:hover {
    background: #67e8f9;
    box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
}

.btn-outline {
    border: 1px solid var(--color-cyan);
    color: var(--color-cyan);
    background: transparent;
}

.btn-outline:hover {
    background: rgba(34, 211, 238, 0.1);
}

/* --- 徽章/标签 --- */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-cyan {
    background: rgba(34, 211, 238, 0.1);
    color: var(--color-cyan);
    border: 1px solid var(--color-cyan-border);
}

.badge-emerald {
    background: var(--color-emerald-dim);
    color: var(--color-emerald);
    border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-tag {
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-tag.cyan { color: var(--color-cyan); }
.badge-tag.purple { color: var(--color-purple); }

.industry-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 10px;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}
.industry-tag.finance {
    color: var(--color-cyan);
    background: rgba(0, 200, 255, 0.1);
    border: 1px solid rgba(0, 200, 255, 0.25);
}
.industry-tag.mfg {
    color: #4ade80;
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.25);
}

/* --- 统计数字 --- */
.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- 证书标签页 --- */
.cert-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2rem;
}

.cert-tab {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--color-cyan-dim);
    background: var(--color-bg-card);
    color: var(--color-text-dim);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.cert-tab:hover {
    border-color: var(--color-cyan-border);
    color: var(--color-text);
}

.cert-tab.active {
    background: rgba(34, 211, 238, 0.15);
    border-color: var(--color-cyan);
    color: var(--color-cyan);
}

.cert-count {
    display: inline-block;
    margin-left: 0.4rem;
    font-size: 0.75rem;
    background: var(--color-cyan-dim);
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-full);
}

/* --- 证书轮播 --- */
.cert-panel { display: none; position: relative; }
.cert-panel.active { display: block; }

.cert-carousel-wrap { position: relative; }

.cert-carousel {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 1rem 0.5rem 1.5rem;
    cursor: grab;
    scrollbar-width: thin;
    scrollbar-color: var(--color-cyan-border) transparent;
}

.cert-carousel::-webkit-scrollbar { height: 4px; }
.cert-carousel::-webkit-scrollbar-track { background: transparent; }
.cert-carousel::-webkit-scrollbar-thumb { background: var(--color-cyan-border); border-radius: 2px; }
.cert-carousel.dragging { cursor: grabbing; scroll-snap-type: none; }

.cert-card {
    flex: 0 0 200px;
    scroll-snap-align: start;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-lg);
    border-color: var(--color-border-hover);
}

.cert-card img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    opacity: 0.85;
    transition: opacity var(--transition-base);
}

.cert-card img.contain-fit {
    object-fit: contain;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.25rem;
}

.cert-card:hover img { opacity: 1; }

.cert-label {
    padding: 0.6rem 0.75rem;
    text-align: center;
    font-size: 0.78rem;
    color: var(--color-text-dim);
    line-height: 1.3;
}

/* 轮播箭头 */
.cert-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-60%);
    z-index: 10;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--color-cyan-border);
    background: rgba(17, 34, 64, 0.85);
    color: var(--color-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    backdrop-filter: blur(4px);
    font-size: 1.25rem;
}

.cert-arrow:hover {
    background: var(--color-cyan-dim);
    border-color: var(--color-cyan);
}

.cert-arrow.left { left: -12px; }
.cert-arrow.right { right: -12px; }
.cert-arrow:disabled { opacity: 0.2; cursor: default; }

/* --- 弹窗 --- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.modal-overlay.active { display: flex; }

.modal-overlay img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

/* --- Hero 特征卡 --- */
.hero-feature-card {
    background: rgba(17, 34, 64, 0.5);
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-base);
}

.hero-feature-card:hover {
    border-color: var(--color-cyan-border);
}

/* --- 案例筛选按钮 --- */
.case-filter {
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-dim);
    transition: all var(--transition-fast);
}

.case-filter:hover {
    border-color: var(--color-cyan-border);
    color: var(--color-text);
}

.case-filter.active {
    background: var(--color-cyan-dim);
    border-color: var(--color-cyan);
    color: var(--color-cyan);
}

/* --- 产品拓扑图 --- */
.product-diagram {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 1.5rem;
    display: block;
}

.product-diagram.arch-diagram {
    max-width: 800px;
    margin-bottom: 0;
}

/* 架构全景区 */
.arch-section {
    max-width: 56rem;
    margin: 0 auto 1rem;
}

.arch-legend {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
    padding: 0 0.5rem;
}

.arch-legend-item {
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.arch-legend-item strong {
    display: block;
    color: var(--color-white);
    font-size: 0.875rem;
    margin-bottom: 0.15rem;
}

.arch-dot {
    flex-shrink: 0;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-top: 0.3rem;
}

.arch-dot.cyan {
    background: var(--color-cyan);
    box-shadow: 0 0 6px rgba(34, 211, 238, 0.4);
}

.arch-dot.cyan-light {
    background: rgba(34, 211, 238, 0.5);
    border: 1.5px solid var(--color-cyan);
}

.arch-dot.purple {
    background: var(--color-purple);
    box-shadow: 0 0 6px rgba(167, 139, 250, 0.4);
}

@media (max-width: 767px) {
    .arch-legend {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.product-diagram .node-circle {
    fill: none;
    stroke-width: 1.5;
}

.product-diagram .node-circle.cyan {
    stroke: var(--color-cyan);
}

.product-diagram .node-circle.purple {
    stroke: var(--color-purple);
}

.product-diagram .node-fill {
    fill: rgba(34, 211, 238, 0.08);
}

.product-diagram .node-fill.purple {
    fill: rgba(167, 139, 250, 0.08);
}

.product-diagram .link-line {
    stroke-width: 1;
    stroke-dasharray: 4 3;
    fill: none;
}

.product-diagram .link-line.cyan {
    stroke: rgba(34, 211, 238, 0.4);
    animation: dash-flow-cyan 2s linear infinite;
}

.product-diagram .link-line.purple {
    stroke: rgba(167, 139, 250, 0.4);
    animation: dash-flow-purple 2s linear infinite;
}

.product-diagram .link-solid {
    stroke-width: 1;
    fill: none;
}

.product-diagram .link-solid.cyan {
    stroke: rgba(34, 211, 238, 0.25);
}

.product-diagram .link-solid.purple {
    stroke: rgba(167, 139, 250, 0.25);
}

.product-diagram .hub-glow {
    animation: hub-pulse 3s ease-in-out infinite;
}

.product-diagram .hub-glow.cyan {
    fill: rgba(34, 211, 238, 0.06);
}

.product-diagram .hub-glow.purple {
    fill: rgba(167, 139, 250, 0.06);
}

.product-diagram .label-text {
    font-family: 'Inter', 'PingFang SC', sans-serif;
    font-size: 10px;
    fill: var(--color-text-dim);
    text-anchor: middle;
}

.product-diagram .label-text.bright {
    fill: var(--color-white);
    font-size: 11px;
    font-weight: 600;
}

.product-diagram .label-text.accent-cyan {
    fill: var(--color-cyan);
    font-size: 9px;
    font-weight: 500;
}

.product-diagram .label-text.accent-purple {
    fill: var(--color-purple);
    font-size: 9px;
    font-weight: 500;
}

.product-diagram .user-dot {
    fill: rgba(34, 211, 238, 0.5);
}

.product-diagram .arrow-head {
    fill: none;
    stroke-width: 1.2;
}

.product-diagram .arrow-head.purple {
    stroke: rgba(167, 139, 250, 0.5);
}

@keyframes dash-flow-cyan {
    to { stroke-dashoffset: -14; }
}

@keyframes dash-flow-purple {
    to { stroke-dashoffset: -14; }
}

@keyframes hub-pulse {
    0%, 100% { opacity: 0.6; transform-origin: center; }
    50% { opacity: 1; }
}