/* ==========================================================================
   石家庄天成泵业官网 · 工程仪表风重构
   色彩：流体蓝 #0077B6 / 工业橙 #F97316 / 钢铁灰 #475569
   设计：纯色块、清晰网格、无渐变与霓虹，突出选型与参数可信度
   ========================================================================== */

:root {
  --color-primary: #0077B6;
  --color-primary-strong: #005a8b;
  --color-accent: #F97316;
  --color-dark: #0A2647;
  --color-surface: #ffffff;
  --color-surface-alt: #E7EEF6;
  --color-bg: #F1F5F9;
  --color-border: #CBD5E1;
  --color-border-strong: #A8B7CB;
  --text-strong: #0F172A;
  --text-body: #1E293B;
  --text-muted: #475569;

  --font-sans: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;

  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* 工程仪表风：更方正、更“设备” */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 999px;

  --shadow-card: 0 10px 24px rgba(10, 38, 71, 0.08);
  --shadow-strong: 0 16px 48px rgba(10, 38, 71, 0.12);

  --container: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  background-image: url("data:image/svg+xml,%3Csvg width='120' height='120' viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Crect width='120' height='120' fill='none' stroke='%23CBD5E1' stroke-width='1'/%3E%3Cpath d='M40 0v120M80 0v120M0 40h120M0 80h120' stroke='%23E2E8F0' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 120px 120px;
  color: var(--text-body);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 180ms ease;
}

a:hover {
  color: var(--color-primary-strong);
}

p {
  margin: 0 0 var(--space-3);
}

section {
  padding: var(--space-16) 0;
  position: relative;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.page-wrapper {
  background: var(--color-bg);
}

.section-head {
  max-width: 880px;
  margin: 0 auto var(--space-10);
  text-align: center;
}

.section-head small {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: #d9e6f2;
  color: var(--color-primary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section-head h2,
h1,
h2,
h3,
h4 {
  color: var(--text-strong);
  margin: var(--space-2) 0;
  line-height: 1.3;
}

.section-head p {
  color: var(--text-muted);
}

.note {
  color: var(--text-muted);
  font-size: 0.96rem;
}

.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

/* -------------------------------------------------------------------------- */
/* 导航 */
/* -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 10px 26px rgba(10, 38, 71, 0.06);
}

.navbar-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-4) var(--space-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-strong);
  font-weight: 700;
  letter-spacing: 0.08em;
  /* 让左侧品牌更贴边一些（仅桌面端），避免公司全名显得居中偏右 */
  margin-left: -10px;
}

.brand-gauge {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 2px solid var(--color-primary);
  display: grid;
  place-items: center;
  position: relative;
  background: #e8f1f9;
}

.brand-gauge::after {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid var(--color-accent);
  transform: rotate(-8deg);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-cn {
  font-size: 0.98rem;
  /* 中文公司全名较长，减少字距并尽量保持单行展示 */
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-en,
.brand-slogan {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.navbar-menu {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: nowrap;
  gap: var(--space-4);
  padding: 0;
  margin: 0;
}

.navbar-menu li {
  position: relative;
}

.navbar-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  color: var(--text-body);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.92rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: var(--space-3);
}

.nav-actions .btn { white-space: nowrap; }

.badge-chip {
  background: #eaf3fa;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  white-space: nowrap;
}

.navbar-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--text-strong);
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-3);
  display: grid;
  gap: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.dropdown-menu a {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-body);
}

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

/* -------------------------------------------------------------------------- */
/* 基础组件 */
/* -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card,
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
}

.panel {
  background: #f8fbff;
}

.bento {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease, color 150ms ease;
  text-transform: uppercase;
  font-size: 0.92rem;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 12px 24px rgba(0, 119, 182, 0.18);
}

.btn-primary:hover {
  background: var(--color-primary-strong);
}

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

.btn-outline:hover {
  background: #e7eef6;
}

.btn-ghost {
  border: 1px solid var(--color-border);
  background: #eef3f8;
  color: var(--text-body);
}

.btn:hover {
  transform: translateY(-1px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #eef3f8;
  color: var(--text-body);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: #eef3f8;
  color: var(--text-body);
  font-size: 0.88rem;
}

.pill {
  padding: 8px 12px;
  background: #eaf3fa;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
}

.stat-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.stat-value {
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: 0.04em;
}

.stat-label {
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.stat {
  display: grid;
  gap: 4px;
}

.curve-legend {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.striped-list {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0;
  border-top: 1px solid var(--color-border);
}

.striped-list li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--text-muted);
}

.list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-3);
  color: var(--text-muted);
}

.list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
}

.list li::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--color-accent);
  margin-top: 6px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.table th,
.table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.table th {
  background: #eef3f8;
  color: var(--text-strong);
}

.table tr:nth-child(even) {
  background: #f8fbff;
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--color-border);
}

.timeline li {
  padding: var(--space-3) var(--space-4);
  position: relative;
  margin-left: var(--space-4);
}

.timeline li::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  background: #fff;
  position: absolute;
  left: -8px;
  top: 12px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}

.gallery img {
  height: 180px;
  object-fit: cover;
}

.case-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  overflow: hidden;
  display: grid;
  gap: var(--space-4);
  box-shadow: var(--shadow-card);
}

.case-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 0;
}

.case-card .content {
  padding: var(--space-5);
}

.accent-border {
  position: relative;
  border: 1px solid var(--color-border);
}

.accent-border::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-primary);
  opacity: 0.18;
  pointer-events: none;
}

.callout {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  display: grid;
  gap: var(--space-3);
}

.chart-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
}

.selector-section {
  position: relative;
  z-index: 2;
}

.selector-section.overlap {
  margin-top: -60px;
}

.selector-box {
  background: #fff;
  border: 2px solid var(--color-primary);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-strong);
}

.selector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.selector-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  align-items: end;
}

.selector-form button {
  width: 100%;
  height: 52px;
}

.selector-result {
  margin-top: var(--space-4);
}

.gauge {
  position: relative;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}

/* -------------------------------------------------------------------------- */
/* 英雄区与背景 */
/* -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding: calc(var(--space-20)) 0 var(--space-12);
  overflow: hidden;
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
}

.hero .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(32px, 4vw, 52px);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-6);
}

.hero-visual {
  position: relative;
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.hero-stats-card {
  position: absolute;
  right: 16px;
  bottom: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: grid;
  gap: 6px;
  box-shadow: var(--shadow-card);
}

.hero-tags {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.hero-overlay,
.fluid-canvas {
  display: none;
}

.fluid-bg {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.bg-dark {
  background: var(--color-dark);
  color: #e5edf5;
}

.bg-dark h2,
.bg-dark h3,
.bg-dark h4,
.bg-dark .section-head small {
  color: #e5edf5;
}

.bg-dark .note,
.bg-dark p {
  color: #d5deea;
}

.bg-dark .card,
.bg-dark .bento,
.bg-dark .panel,
.bg-dark .chart-wrapper,
.bg-dark .gauge {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  color: #e5edf5;
  box-shadow: none;
}

.page-hero {
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
}

.page-hero .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
  align-items: center;
}

/* -------------------------------------------------------------------------- */
/* 表单 */
/* -------------------------------------------------------------------------- */
form {
  display: grid;
  gap: var(--space-4);
}

label {
  display: grid;
  gap: var(--space-2);
  color: var(--text-strong);
  font-weight: 600;
}

.input,
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--text-strong);
  font-family: inherit;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.18);
}

/* -------------------------------------------------------------------------- */
/* 页脚 */
/* -------------------------------------------------------------------------- */
.footer {
  background: var(--color-dark);
  color: #e5edf5;
  padding: var(--space-12) 0 var(--space-6);
  margin-top: var(--space-12);
}

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

.footer-nav h5,
.footer h3 {
  margin-top: 0;
  color: #fff;
}

.footer-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.footer a {
  color: #e5edf5;
}

.footer a:hover {
  color: #ffffff;
}

.footer-bottom,
.footer-note {
  text-align: center;
  color: #c6d4e6;
  letter-spacing: 0.12em;
  font-size: 0.9rem;
}

/* -------------------------------------------------------------------------- */
/* 响应式 */
/* -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .navbar-inner {
    grid-template-columns: auto auto;
    grid-template-areas:
      "logo toggle"
      "menu menu";
    align-items: center;
  }

  .brand { margin-left: 0; }

  .navbar-menu {
    grid-area: menu;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) 0 var(--space-6);
    width: 100%;
  }

  .navbar-menu.active { display: flex; }
  .navbar-toggle { display: inline-flex; justify-content: center; align-items: center; }
  .nav-actions { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { padding-top: var(--space-16); }
  .selector-section.overlap { margin-top: -20px; }
  .selector-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  :root { --container: 100%; }
  section { padding: var(--space-12) 0; }
  .hero { padding-top: var(--space-12); }
  .hero .container,
  .page-hero .container {
    grid-template-columns: 1fr;
  }
  .selector-section.overlap { margin-top: 0; }
  .selector-form { grid-template-columns: 1fr; }
}