/*
 * style.css - 申达电气集团 「工业蓝图」主题
 * 设计基于方案V4：电力蓝主色、工业目录式排版、纯色无渐变
 */

:root {
    --color-primary: #003366;
    --color-secondary: #E85D04;
    --color-success: #2D6A4F;
    --color-bg: #F8F9FA;
    --color-surface: #FFFFFF;
    --color-surface-alt: #EEF2F6;
    --color-dark: #001D3D;
    --color-text: #212529;
    --color-muted: #5C6C7A;
    --border-color: #CED4DA;
    --shadow-soft: 0 10px 28px rgba(0, 51, 102, 0.08);
    --shadow-card: 0 16px 40px rgba(0, 51, 102, 0.1);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    --header-height: 78px;
    --topbar-height: 0px;
    --container-width: 1200px;
    --transition: all 0.25s ease;
}

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', system-ui, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    padding-top: calc(var(--header-height) + var(--topbar-height));
}

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

a:hover {
    color: var(--color-secondary);
}

img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

p {
    margin: 0 0 var(--spacing-md);
    color: var(--color-text);
}

ul {
    list-style: none;
}

ol {
    padding-left: 1.25rem;
    color: var(--color-text);
}

main {
    position: relative;
    z-index: 1;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    position: relative;
    padding: var(--spacing-xl) 0;
    background: transparent;
}

.section-light {
    background: var(--color-surface);
}

.section-panel {
    background: var(--color-surface-alt);
}

.section-dark,
.bg-dark {
    background: var(--color-dark);
    color: #fff;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title h2 {
    font-size: 2rem;
    margin-top: var(--spacing-xs);
    letter-spacing: 0.05em;
}

.section-title .subtitle {
    letter-spacing: 0.3em;
    font-size: 0.85rem;
    color: var(--color-muted);
    text-transform: uppercase;
}

.section-dark .section-title h2,
.bg-dark .section-title h2 {
    color: #fff;
}

.section-dark .section-title .subtitle,
.bg-dark .section-title .subtitle {
    color: #CED8EA;
}

.section-dark .section-title p,
.bg-dark .section-title p {
    color: #E6ECF5;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.85rem;
    background: #E6ECF3;
    color: var(--color-primary);
    border-radius: 999px;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.subtitle {
    letter-spacing: 0.25em;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.glow-divider {
    width: 100%;
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-lg) 0;
}

.chip-row,
.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-xs);
}

.chip,
.pill,
.signal-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: #fff;
    color: var(--color-primary);
    font-size: 0.9rem;
}

.ribbon {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: var(--color-secondary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.data-ribbon {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    border-left: 4px solid var(--color-secondary);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    color: var(--color-text);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.78rem 1.4rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: var(--transition);
    text-transform: none;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: #00284f;
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-ghost:hover {
    color: var(--color-secondary);
}

/* 顶部条与导航 */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--topbar-height);
    background: var(--color-dark);
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 1001;
    font-size: 0.95rem;
}

.top-bar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.top-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.top-actions a {
    color: #E6ECF5;
    font-size: 0.9rem;
}

.header {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.header .container {
    padding-left: 0.5rem;
}

.header.scrolled {
    box-shadow: var(--shadow-soft);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--spacing-md);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    font-weight: 800;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.brand .brand-main {
    font-size: 1.1rem;
}

.brand .brand-sub {
    font-size: 0.95rem;
    color: var(--color-secondary);
    letter-spacing: 0.22em;
}

.brand-tagline,
.logo span {
    color: var(--color-secondary);
    letter-spacing: 0.2em;
    font-size: 0.85rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.55rem 0.9rem;
    border-radius: var(--radius-sm);
    color: var(--color-text);
    border: 1px solid transparent;
    font-weight: 600;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    border-color: var(--border-color);
    background: var(--color-surface-alt);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 220px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: var(--spacing-sm);
    display: none;
}

.nav-item:hover > .dropdown-menu {
    display: block;
}

.dropdown-item a {
    display: block;
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--color-text);
}

.dropdown-item a:hover {
    background: var(--color-surface-alt);
    color: var(--color-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-actions .btn {
    padding: 0.55rem 1.05rem;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

.signal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-success);
    border: 2px solid #fff;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 6px;
    background: #fff;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 4px;
}

/* 英雄区 */
.hero-bg,
.hero-overlay,
.hero-grid-overlay,
.pulse-lines {
    display: none;
}

.hero {
    position: relative;
    background: var(--color-surface-alt);
    padding: 120px 0 90px;
    color: var(--color-text);
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: rgba(0, 51, 102, 0.04);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cpath d='M0 0h120v120H0z' fill='none'/%3E%3Cg stroke='%23003366' stroke-width='0.6' opacity='0.35'%3E%3Cpath d='M0 30h120M0 60h120M0 90h120'/%3E%3Cpath d='M30 0v120M60 0v120M90 0v120'/%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: clamp(2.4rem, 4vw, 3.4rem);
    line-height: 1.15;
    margin: var(--spacing-sm) 0;
}

.hero-content .hero-desc,
.hero p {
    color: var(--color-muted);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: var(--spacing-lg);
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.hero-stat {
    background: var(--color-surface-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.hero-stat .label {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.hero-stat .number {
    font-family: 'Rajdhani', 'DIN Alternate', 'Roboto Mono', monospace;
    font-size: 1.9rem;
    color: var(--color-primary);
    margin-top: 0.35rem;
}

.hero-visual {
    background: var(--color-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-card);
    position: relative;
    z-index: 1;
}

.hero-badges {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.hero-metrics .metric-card {
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    background: var(--color-surface-alt);
}

.hero-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.hero-panel {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
    background: var(--color-surface-alt);
    color: var(--color-text);
}

/* 栅格与卡片 */
.row {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--spacing-lg);
}

.col-12 { grid-column: span 12; }

@media (min-width: 768px) {
    .col-md-3 { grid-column: span 3; }
    .col-md-4 { grid-column: span 4; }
    .col-md-6 { grid-column: span 6; }
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
}

.case-grid,
.service-grid,
.news-grid,
.contact-grid,
.products-grid,
.solutions-grid,
.metric-grid,
.bento-grid,
.network-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.card,
.product-card,
.service-card,
.solution-card,
.contact-card,
.case-card,
.data-card,
.network-card,
.highlight-card,
.news-tile,
.detail-card {
    background: var(--color-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
    color: var(--color-text);
}

.card h3,
.product-card h3,
.service-card h3,
.solution-card h3,
.case-card h3,
.data-card h3,
.network-card h3,
.news-tile h3,
.detail-card h3,
.contact-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.product-card img,
.news-tile img,
.case-card img {
    height: 210px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.icon-list li,
.service-card ul li,
.solution-card ul li {
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
    margin-bottom: 0.45rem;
    color: var(--color-muted);
}

.icon-list li span {
    display: inline-flex;
    width: 28px;
    height: 28px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.bg-dark .solution-card,
.section-dark .solution-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: none;
    color: #E6ECF5;
}

.bg-dark .solution-card h3,
.section-dark .solution-card h3 {
    color: #fff;
}

.bg-dark .solution-card p,
.section-dark .solution-card p {
    color: #D9E2EF;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
}

.stat-chip {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--color-surface-alt);
}

.stat-chip .label {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.stat-chip .number {
    font-weight: 700;
    color: var(--color-primary);
}

.specs {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-xs);
    border-top: 1px dashed var(--border-color);
    color: var(--color-muted);
    font-size: 0.95rem;
}

.specs li { padding: 4px 0; }

.bento-card {
    position: relative;
    background: var(--color-surface-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow: hidden;
}

.bento-card .signal-pill {
    background: #fff;
    border-color: var(--border-color);
}

.news-grid {
    gap: var(--spacing-lg);
}

.news-tile .news-body { margin-top: var(--spacing-sm); }

.news-body time,
.article-meta {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.news-body p,
.article-body p {
    color: var(--color-text);
}

.data-card,
.network-card {
    background: var(--color-surface);
    border: 1px solid var(--border-color);
}

.network-card {
    padding: var(--spacing-lg);
}

/* 产品3D展示 */
.product-3d {
    background: var(--color-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.product-3d__frame {
    background: var(--color-surface-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    text-align: center;
}

.product-3d__model {
    max-height: 320px;
    margin: 0 auto;
    transform: perspective(1200px) rotateY(var(--angle, 0deg));
    transition: transform 0.3s ease;
}

.product-3d__shine { display: none; }

.viewer-controls {
    margin-top: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    color: var(--color-muted);
}

.viewer-controls input[type="range"] {
    width: 100%;
}

/* 数据与表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-sm);
}

.data-table th,
.data-table td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    text-align: left;
    color: var(--color-text);
}

.data-table th {
    background: var(--color-surface-alt);
    color: var(--color-primary);
}

.gauge {
    position: relative;
    width: 100%;
    height: 12px;
    background: var(--color-surface-alt);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    margin-top: var(--spacing-sm);
    --value: 0;
}

.gauge::before {
    content: '';
    position: absolute;
    inset: 0;
    width: calc(var(--value, 0) * 1%);
    background: var(--color-primary);
    border-radius: 999px;
}

.gauge-value {
    margin-top: var(--spacing-xs);
    font-weight: 700;
    color: var(--color-primary);
}

.gauge-label {
    color: var(--color-muted);
    font-size: 0.95rem;
}

/* 页面头部（内页） */
.page-hero {
    background: var(--color-dark);
    color: #fff;
    padding: 80px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.page-hero h1 { margin: var(--spacing-sm) 0 var(--spacing-xs); }
.page-hero p { color: #E6ECF5; }

.page-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: var(--spacing-sm);
}

.page-tabs a {
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
}

.page-tabs a.active {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
}

/* 联系方式与地图 */
.map-board {
    position: relative;
    background: var(--color-surface-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    min-height: 280px;
    overflow: hidden;
}

.map-marker {
    position: absolute;
    transform: translate(-50%, -50%);
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.35rem 0.65rem;
    font-size: 0.9rem;
    color: var(--color-primary);
    white-space: nowrap;
}

.map-legend {
    position: absolute;
    left: var(--spacing-sm);
    bottom: var(--spacing-sm);
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.8rem;
    color: var(--color-text);
}

.map-meta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.map-stat {
    min-width: 120px;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--color-surface-alt);
}

/* 表单 */
.form-control {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #fff;
    font-size: 1rem;
}

.form-control:focus {
    outline: 2px solid rgba(0, 51, 102, 0.2);
    border-color: var(--color-primary);
}

/* 时间轴 */
.timeline {
    display: grid;
    gap: 0.85rem;
    border-left: 2px solid var(--border-color);
    padding-left: var(--spacing-md);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-sm);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -22px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid #fff;
}

.timeline-date {
    font-weight: 700;
    color: var(--color-primary);
}

/* 页脚 */
.footer {
    background: var(--color-dark);
    color: #fff;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer h4 {
    margin-bottom: var(--spacing-sm);
}

.footer p,
.footer a,
.footer ul li {
    color: #DCE6F5;
}

.footer ul li { margin-bottom: 0.35rem; }

.footer-bottom {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: #B5C4D8;
}

/* 辅助 */
.article-body {
    display: grid;
    gap: var(--spacing-md);
}

.detail-card {
    background: var(--color-surface);
}

.highlight-card {
    background: var(--color-surface-alt);
}

.signal-pill { background: #fff; }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-success); }
.label { color: var(--color-muted); }
.number,
.value { color: var(--color-primary); font-family: 'Rajdhani', 'DIN Alternate', 'Roboto Mono', monospace; }

.news-list {
    display: grid;
    gap: var(--spacing-sm);
}

.news-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.article-meta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* 响应式 */
@media (max-width: 1024px) {
    body { padding-top: calc(var(--topbar-height) + var(--header-height)); }
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border-color);
        padding: var(--spacing-md);
        flex-direction: column;
        align-items: flex-start;
        display: none;
        box-shadow: var(--shadow-soft);
    }
    .nav-menu.active { display: flex; }
    .nav-actions { display: none; }
    .menu-toggle { display: inline-flex; }
    .navbar { align-items: center; }
}

@media (max-width: 768px) {
    .hero { padding: 90px 0 60px; }
    .section { padding: var(--spacing-lg) 0; }
    .top-bar { position: static; height: auto; padding: 0.35rem 0; }
    .header { position: sticky; top: 0; }
    body { padding-top: 0; }
}