/*
 * 太原市德铂数据科技有限公司官网全局样式
 * 设计基调：数据可视化、深色科技质感、专业企业级
 */

/* 1. 设计变量 (Design Tokens) */
:root {
    /* 色彩 */
    --color-primary: #1D4ED8; /* 数据蓝 */
    --color-primary-strong: #10275f;
    --color-secondary: #22C55E; /* 增长绿 */
    --color-accent: #F97316;    /* 警示橙 */
    --color-surface: #0F172A;   /* 深空背景 */
    --color-surface-2: #0b1220; /* 面板底色 */
    --color-surface-3: #11182b; /* 卡片底色 */
    --color-border: #1f2a44;
    --color-text-strong: #E2E8F0;
    --color-text: #C7D2FE;
    --color-text-muted: #94A3B8;

    /* 字体与圆角 */
    --font-main: 'Alibaba PuHuiTi', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-heading: 'Alibaba PuHuiTi', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-base: 16px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;

    /* 阴影与线框 */
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 16px 50px rgba(0, 0, 0, 0.32);
    --glow-primary: 0 0 30px rgba(29, 78, 216, 0.35);
    --glow-secondary: 0 0 24px rgba(34, 197, 94, 0.25);

    /* 布局 */
    --max-width: 1200px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;
    --spacing-16: 64px;
}

/* 2. 全局基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background: radial-gradient(circle at 20% 20%, rgba(29, 78, 216, 0.12), transparent 22%),
                radial-gradient(circle at 80% 0%, rgba(34, 197, 94, 0.14), transparent 25%),
                linear-gradient(180deg, #0a0f1c 0%, #0d1426 55%, #0b1220 100%);
    min-height: 100vh;
}

a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease, opacity 0.3s ease;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-strong);
    line-height: 1.25;
}

p {
    color: var(--color-text);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section {
    padding: var(--spacing-16) 0;
}

.section-header {
    max-width: 760px;
    margin: 0 auto var(--spacing-12);
    text-align: center;
}

.section-header h2 {
    font-size: 2.2rem;
}

.section-header p {
    color: var(--color-text-muted);
    margin-top: var(--spacing-4);
}

.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.panel {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-sm);
}

.panel-strong {
    background: radial-gradient(circle at 10% 10%, rgba(29, 78, 216, 0.08), transparent 40%),
                radial-gradient(circle at 90% 30%, rgba(34, 197, 94, 0.08), transparent 45%),
                linear-gradient(145deg, rgba(17, 24, 39, 0.9), rgba(15, 23, 42, 0.75));
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-strong);
    font-size: 0.9rem;
    letter-spacing: 0.2px;
}

.tag.primary { color: var(--color-primary); background: rgba(29, 78, 216, 0.14); }
.tag.secondary { color: var(--color-secondary); background: rgba(34, 197, 94, 0.14); }
.tag.accent { color: var(--color-accent); background: rgba(249, 115, 22, 0.14); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    box-shadow: var(--glow-primary);
    border-color: rgba(255, 255, 255, 0.08);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(29, 78, 216, 0.4); }

.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text-strong);
    border-color: rgba(255, 255, 255, 0.08);
}

.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.2); }

.pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* 3. 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 18, 32, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) 0;
}

.logo a {
    color: #fff;
    font-size: 1.5rem;
    letter-spacing: 0.5px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: var(--spacing-4);
}

.nav-item {
    position: relative;
}

.nav-item > a {
    color: var(--color-text);
    padding: 8px 4px;
    border-bottom: 2px solid transparent;
}

.nav-item > a:hover,
.nav-item > a.active {
    color: var(--color-text-strong);
    border-color: var(--color-primary);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 110%;
    left: 0;
    min-width: 180px;
    background: #0e1627;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: var(--spacing-3) 0;
    box-shadow: var(--shadow-md);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 14px;
    color: var(--color-text);
}

.dropdown-menu li a:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text-strong);
}

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

/* 4. 首页与子页 Hero */
.hero {
    padding-top: 120px;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 15% 20%, rgba(37, 99, 235, 0.25), transparent 35%),
                radial-gradient(circle at 80% 0%, rgba(34, 197, 94, 0.18), transparent 30%),
                linear-gradient(145deg, #0d1426 0%, #0a0f1c 50%, #0f172a 100%);
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(90deg, rgba(255,255,255,0.05), rgba(255,255,255,0.05) 1px, transparent 1px, transparent 80px),
                repeating-linear-gradient(0deg, rgba(255,255,255,0.05), rgba(255,255,255,0.05) 1px, transparent 1px, transparent 80px);
    opacity: 0.08;
    animation: grid-move 28s linear infinite;
}

.hero::after {
    background: radial-gradient(circle at 70% 40%, rgba(37, 99, 235, 0.12), transparent 45%),
                radial-gradient(circle at 20% 70%, rgba(249, 115, 22, 0.08), transparent 40%);
    animation: pulse 18s ease-in-out infinite;
}

.hero-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-12);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: var(--spacing-4);
}

.hero-subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-8);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    padding: var(--spacing-6);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.data-badge {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: rgba(29, 78, 216, 0.12);
    border: 1px solid rgba(29, 78, 216, 0.32);
    border-radius: var(--radius-md);
    color: var(--color-text-strong);
}

.data-badge .value {
    font-size: 1.4rem;
    color: #fff;
}

.flow-line {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(29, 78, 216, 0.2), rgba(34, 197, 94, 0.15), rgba(249, 115, 22, 0.12));
    filter: blur(40px);
    opacity: 0.7;
    animation: flow 12s ease-in-out infinite alternate;
    border-radius: var(--radius-lg);
}

.page-hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-12);
    background: linear-gradient(145deg, rgba(16, 23, 42, 0.95), rgba(11, 18, 32, 0.9));
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.18), transparent 40%),
                radial-gradient(circle at 80% 10%, rgba(34, 197, 94, 0.12), transparent 40%);
    opacity: 0.7;
}

.page-hero .breadcrumb {
    display: flex;
    gap: var(--spacing-2);
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-4);
}

/* 5. 卡片与表格 */
.card {
    background: var(--color-surface-3);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.metric {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

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

.metric .value {
    color: #fff;
    font-size: 1.6rem;
    font-weight: 700;
}

.timeline {
    border-left: 2px solid rgba(255, 255, 255, 0.08);
    padding-left: var(--spacing-6);
    display: grid;
    gap: var(--spacing-6);
}

.timeline-item {
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 6px;
    width: 14px;
    height: 14px;
    background: linear-gradient(135deg, #2563eb, #22c55e);
    border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.18);
}

table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
    border-radius: var(--radius-md);
}

table thead {
    background: rgba(255, 255, 255, 0.04);
}

table th, table td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--color-text);
    text-align: left;
}

/* 6. 表单与联系 */
form {
    display: grid;
    gap: var(--spacing-4);
}

input, textarea, select {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    color: var(--color-text-strong);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.6);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

/* 7. 底部 */
.footer {
    background: #0a0f1c;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--spacing-12) 0;
    margin-top: var(--spacing-12);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-6);
}

.footer h4 {
    color: #fff;
    margin-bottom: var(--spacing-4);
}

.footer ul {
    list-style: none;
    display: grid;
    gap: var(--spacing-2);
}

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

.footer a:hover {
    color: var(--color-text-strong);
}

.footer-bottom {
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-4);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* 8. 动画 */
@keyframes flow {
    0% { transform: translate3d(-10px, -8px, 0) scale(1); }
    50% { transform: translate3d(18px, 14px, 0) scale(1.05); }
    100% { transform: translate3d(10px, -4px, 0) scale(1.02); }
}

@keyframes grid-move {
    from { transform: translate3d(0, 0, 0); }
    to { transform: translate3d(-80px, -60px, 0); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 0.7; }
}

/* 9. 响应式 */
@media (max-width: 992px) {
    .hero-title { font-size: 2.3rem; }
    .nav-menu { gap: var(--spacing-3); }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .hero, .page-hero { padding-top: 100px; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
}