/* ============================================================
   格物中和 · 新能源人机融合系统官网
   工业风 · 绿色能源主题（延续光伏系统 UI 风格）
   ============================================================ */

:root {
  --bg-deep: #070d16;
  --bg-main: #0b1420;
  --bg-panel: rgba(16, 30, 44, 0.72);
  --bg-card: rgba(20, 38, 54, 0.55);
  --line: rgba(52, 211, 153, 0.16);
  --line-strong: rgba(52, 211, 153, 0.38);
  --green: #34d399;
  --green-bright: #00e676;
  --green-dim: #10b981;
  --cyan: #38bdf8;
  --amber: #f59e0b;
  --text-hi: #e6f7ee;
  --text-mid: #9fb8ad;
  --text-low: #5d7a6e;
  --font-num: 'Consolas', 'Cascadia Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', sans-serif;
  color: var(--text-hi);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(16, 185, 129, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(56, 189, 248, 0.07), transparent 55%),
    var(--bg-deep);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 网格背景 */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(74, 222, 128, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 222, 128, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
  z-index: 0;
}

/* 顶部扫描线 */
.scanline {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--green-bright), var(--cyan), transparent);
  z-index: 999;
  animation: scanline 6s linear infinite;
  opacity: .8;
}
@keyframes scanline {
  0% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(30deg); }
  100% { filter: hue-rotate(0deg); }
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky; top: 3px; z-index: 100;
  background: rgba(10, 22, 33, .9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-strong);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-logo {
  width: 36px; height: 36px; border-radius: 8px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--green-dim), #059669);
  box-shadow: 0 0 18px rgba(16, 185, 129, .45);
}
.brand-title { font-size: 17px; font-weight: 700; letter-spacing: 2px; color: var(--text-hi); }
.brand-title .accent { color: var(--green-bright); }
.brand-sub { font-size: 10px; color: var(--text-low); letter-spacing: 2px; }

.main-nav { display: flex; gap: 4px; }
.main-nav a {
  padding: 8px 16px; text-decoration: none;
  color: var(--text-mid); font-size: 14px; letter-spacing: 1px;
  border-bottom: 2px solid transparent;
  transition: all .25s;
}
.main-nav a:hover { color: var(--text-hi); }
.main-nav a.active { color: var(--green-bright); border-bottom-color: var(--green-bright); }

.btn {
  display: inline-block; padding: 10px 22px;
  font-size: 14px; letter-spacing: 1px; text-decoration: none;
  border-radius: 6px; transition: all .25s; cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--green-dim), #059669);
  color: #04120b; font-weight: 700;
  box-shadow: 0 0 20px rgba(16, 185, 129, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(16, 185, 129, .55); }
.btn-outline {
  border-color: var(--line-strong); color: var(--green-bright);
  background: rgba(16, 185, 129, .06);
}
.btn-outline:hover { background: rgba(16, 185, 129, .15); border-color: var(--green); }
.btn-ghost { color: var(--text-mid); border-color: var(--line); }
.btn-ghost:hover { color: var(--green-bright); border-color: var(--green); }
.btn-lg { padding: 14px 34px; font-size: 16px; }

.nav-toggle {
  display: none; flex-direction: column; gap: 4px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text-hi); }

/* ============ Hero ============ */
.hero { position: relative; padding: 96px 0 80px; overflow: hidden; }
.hero-inner { text-align: center; }
.hero-eyebrow {
  font-size: 12px; letter-spacing: 4px; color: var(--green);
  margin-bottom: 22px;
}
.hero-title {
  font-size: 48px; font-weight: 700; letter-spacing: 2px; line-height: 1.3;
  margin-bottom: 22px;
}
.hero-sub {
  font-size: 17px; color: var(--text-mid); line-height: 1.9;
  margin-bottom: 38px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }
.hero-metrics {
  display: flex; justify-content: center; gap: 64px; flex-wrap: wrap;
  padding-top: 40px; border-top: 1px solid var(--line);
}
.metric { text-align: center; }
.m-num { font-family: var(--font-num); font-size: 30px; color: var(--green-bright); }
.m-label { font-size: 13px; color: var(--text-low); margin-top: 6px; letter-spacing: 1px; }

/* ============ Section 通用 ============ */
.section { padding: 80px 0; }
.section-alt { background: rgba(10, 22, 33, .55); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { text-align: center; margin-bottom: 48px; }
.eyebrow { font-size: 12px; letter-spacing: 3px; color: var(--green); margin-bottom: 12px; }
.section-head h2 { font-size: 30px; font-weight: 700; letter-spacing: 1px; }
.section-desc { color: var(--text-mid); margin-top: 10px; font-size: 15px; }

/* ============ 核心能力 ============ */
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cap-card {
  background: var(--bg-card);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 28px 22px;
  transition: all .3s;
}
.cap-card:hover { transform: translateY(-4px); border-color: var(--green); box-shadow: 0 0 24px rgba(16, 185, 129, .12); }
.cap-icon { color: var(--green-bright); margin-bottom: 16px; }
.cap-card h3 { font-size: 17px; margin-bottom: 10px; letter-spacing: 1px; }
.cap-card p { font-size: 13.5px; color: var(--text-mid); line-height: 1.8; }

/* ============ 案例 ============ */
.case-banner {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center;
  background: var(--bg-panel);
  border: 1px solid var(--line); border-radius: 14px;
  padding: 40px;
}
.case-text h3 { font-size: 21px; margin-bottom: 14px; letter-spacing: 1px; }
.case-text > p { color: var(--text-mid); font-size: 14.5px; margin-bottom: 18px; }
.case-points { list-style: none; margin-bottom: 24px; }
.case-points li {
  position: relative; padding-left: 22px; margin-bottom: 8px;
  font-size: 14px; color: var(--text-hi);
}
.case-points li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--green-bright); box-shadow: 0 0 8px var(--green-bright);
}
.case-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.case-visual { display: flex; justify-content: center; }
.pv-panel {
  width: 100%; max-width: 340px;
  background: var(--bg-card);
  border: 1px solid var(--line-strong); border-radius: 12px;
  padding: 20px;
}
.pv-row {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--text-mid);
  padding: 8px 4px; border-bottom: 1px dashed var(--line);
}
.pv-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green-bright); box-shadow: 0 0 6px var(--green-bright); }
.pv-val { margin-left: auto; font-family: var(--font-num); color: var(--green-bright); font-size: 13px; }
.pv-chart {
  display: flex; align-items: flex-end; gap: 10px;
  height: 120px; padding-top: 18px;
}
.bar {
  flex: 1; border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--green-bright), rgba(16, 185, 129, .25));
  animation: rise 1s ease-out;
}
@keyframes rise { from { height: 0; } }

/* ============ 关于我们 ============ */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.about-text { color: var(--text-mid); margin-bottom: 14px; font-size: 15px; }
.about-points { display: flex; flex-direction: column; gap: 12px; }
.ap {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 18px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 8px;
  font-size: 14px; color: var(--text-hi);
}
.ap span { font-family: var(--font-num); color: var(--green-bright); font-size: 15px; }

/* ============ 联系我们 ============ */
.contact-card {
  max-width: 760px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.contact-item {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 10px;
  padding: 22px; text-align: center;
}
.ci-label { font-size: 12px; color: var(--text-low); letter-spacing: 2px; margin-bottom: 8px; }
.ci-value { font-size: 15px; color: var(--green-bright); font-family: var(--font-num); }

/* ============ 案例页：痛点 ============ */
.page-hero { padding: 72px 0 56px; }
.page-hero h1 { font-size: 36px; font-weight: 700; letter-spacing: 2px; line-height: 1.4; margin-bottom: 14px; }
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pain-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 10px;
  padding: 24px 20px;
}
.pain-card h3 { color: var(--amber); font-size: 16px; margin-bottom: 10px; }
.pain-card p { font-size: 13.5px; color: var(--text-mid); line-height: 1.8; }

/* ============ 案例页：架构流 ============ */
.arch-flow {
  display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 16px; align-items: center;
}
.arch-step {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 10px;
  padding: 22px 18px; text-align: center;
}
.arch-num {
  font-family: var(--font-num); font-size: 13px; color: var(--green-bright);
  margin-bottom: 8px; letter-spacing: 1px;
}
.arch-step h3 { font-size: 15px; margin-bottom: 8px; }
.arch-step p { font-size: 12.5px; color: var(--text-mid); line-height: 1.7; }
.arch-arrow { color: var(--green); font-size: 22px; }

/* ============ 案例页：功能 ============ */
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feat-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 10px;
  padding: 26px 20px; transition: all .3s;
}
.feat-card:hover { border-color: var(--green); transform: translateY(-3px); }
.feat-icon { color: var(--green-bright); margin-bottom: 14px; }
.feat-card h3 { font-size: 16px; margin-bottom: 10px; }
.feat-card p { font-size: 13px; color: var(--text-mid); line-height: 1.8; }

/* ============ 案例页：演示 CTA ============ */
.demo-section { padding: 60px 0; }
.demo-card {
  text-align: center;
  background: linear-gradient(160deg, rgba(16, 185, 129, .14), rgba(10, 22, 33, .7));
  border: 1px solid var(--line-strong); border-radius: 14px;
  padding: 52px 32px;
}
.demo-card h2 { font-size: 28px; margin-bottom: 14px; letter-spacing: 2px; }
.demo-card p { color: var(--text-mid); margin-bottom: 28px; }
.demo-tags { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 26px; }
.demo-tags span {
  font-size: 12px; color: var(--green-bright);
  border: 1px solid var(--line-strong); border-radius: 20px;
  padding: 5px 14px; background: rgba(16, 185, 129, .06);
}

/* ============ Footer ============ */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: var(--text-mid); font-size: 14px; letter-spacing: 2px; }
.footer-copy { color: var(--text-low); font-size: 12.5px; }

/* ============ 滚动动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .cap-grid, .pain-grid, .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .case-banner { grid-template-columns: 1fr; }
  .arch-flow { grid-template-columns: 1fr; }
  .arch-arrow { transform: rotate(90deg); text-align: center; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 34px; }
  .hero-metrics { gap: 32px; }
  .main-nav {
    display: none; position: absolute; top: 62px; left: 0; right: 0;
    flex-direction: column; background: rgba(10, 22, 33, .98);
    border-bottom: 1px solid var(--line); padding: 8px 24px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; border-bottom: none; border-left: 2px solid transparent; }
  .main-nav a.active { border-left-color: var(--green-bright); }
  .nav-toggle { display: flex; }
  .btn-demo { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-card { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .cap-grid, .pain-grid, .feat-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 28px; }
  .section { padding: 56px 0; }
}