/* ================================
   一木机电 emoooo.cn 设计系统
   ================================ */
:root {
  /* 主色：深蓝（工程感、稳重） */
  --c-primary: #0A2540;
  --c-primary-2: #14365C;
  --c-primary-3: #1F4D85;
  --c-primary-soft: #E8EFF7;

  /* 强调色：暖橙（CTA、能源感） */
  --c-accent: #FF6B35;
  --c-accent-dark: #E5571F;
  --c-accent-soft: #FFE9DC;

  /* 中性 */
  --c-text: #0F1B2D;
  --c-text-2: #4A5A6E;
  --c-text-3: #7C8B9D;
  --c-bg: #FFFFFF;
  --c-bg-2: #F6F9FC;
  --c-bg-3: #EDF2F7;
  --c-line: #DCE5EE;

  /* 阴影 */
  --sh-1: 0 1px 2px rgba(10,37,64,.06);
  --sh-2: 0 4px 12px rgba(10,37,64,.08);
  --sh-3: 0 12px 32px rgba(10,37,64,.12);
  --sh-glow: 0 8px 32px rgba(255,107,53,.25);

  /* 圆角 */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* 容器 */
  --container: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.6;
  font-feature-settings: "tnum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ============ Header ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--c-line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-3) 100%);
  color: #fff; font-weight: 800; font-size: 22px;
  display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(10,37,64,.2);
}
.brand-name { font-size: 18px; font-weight: 700; color: var(--c-primary); letter-spacing: .5px; }
.brand-sub  { font-size: 11px; color: var(--c-text-3); letter-spacing: 2px; margin-top: 2px; }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a {
  font-size: 15px; color: var(--c-text-2); font-weight: 500;
  position: relative; padding: 6px 0;
}
.nav-links a:hover { color: var(--c-primary); }
.nav-links a.active { color: var(--c-primary); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px;
  height: 2px; background: var(--c-accent); border-radius: 2px;
}
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--r-md);
  background: var(--c-accent); color: #fff !important;
  font-weight: 600; font-size: 14px;
  transition: all .2s;
}
.nav-cta:hover { background: var(--c-accent-dark); transform: translateY(-1px); box-shadow: var(--sh-glow); }
.nav-cta svg { width: 16px; height: 16px; }

/* ============ Hero ============ */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,107,53,.12), transparent 40%),
    radial-gradient(circle at 80% 60%, rgba(31,77,133,.5), transparent 50%),
    linear-gradient(135deg, var(--c-primary) 0%, #0c2d52 60%, #102f55 100%);
  color: #fff;
  padding: 96px 0 88px;
}
.hero-bg-svg {
  position: absolute; inset: 0; opacity: .35; pointer-events: none;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr; gap: 48px; align-items: center;
  position: relative; z-index: 2;
  text-align: center;
}
.hero-grid > div:first-child { max-width: 760px; margin: 0 auto; }
.hero-grid .hero-desc { margin-left: auto; margin-right: auto; }
.hero-grid .hero-cta { justify-content: center; }
.hero-grid .hero-stats { max-width: 640px; margin-left: auto; margin-right: auto; }
.hero-visual { display: none; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 100px;
  background: rgba(255,107,53,.18);
  border: 1px solid rgba(255,107,53,.35);
  color: #FFB89A; font-size: 13px; font-weight: 500;
  margin-bottom: 24px;
}
.hero-tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-accent); box-shadow: 0 0 12px var(--c-accent);
}
.hero h1 {
  font-size: clamp(36px, 4vw, 56px); font-weight: 800; line-height: 1.15;
  letter-spacing: -.5px; margin-bottom: 24px;
}
.hero h1 .accent {
  background: linear-gradient(120deg, #FFB89A 0%, #FF6B35 60%, #FF8C5A 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-desc { font-size: 18px; color: rgba(255,255,255,.78); margin-bottom: 36px; max-width: 560px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; border-radius: var(--r-md);
  font-size: 15px; font-weight: 600;
  border: none; transition: all .2s;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--c-accent); color: #fff; box-shadow: var(--sh-glow); }
.btn-primary:hover { background: var(--c-accent-dark); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.3); }
.btn-ghost:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.5); }

.hero-stats {
  display: grid; grid-template-columns: repeat(2,1fr); gap: 12px;
  margin-top: 56px;
}
.hero-stat {
  padding: 20px 24px; border-radius: var(--r-md);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(8px);
}
.hero-stat-num { font-size: 32px; font-weight: 800; letter-spacing: -1px; line-height: 1; }
.hero-stat-num .unit { font-size: 18px; color: var(--c-accent); margin-left: 2px; }
.hero-stat-label { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 8px; }

/* Hero 视觉卡（右侧） */
.hero-visual {
  position: relative; aspect-ratio: 1/1; max-width: 480px; margin-left: auto;
}
.hero-card {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(255,255,255,.08) 0%, rgba(255,255,255,.02) 100%);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,.3);
}
.hero-card-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-card-content {
  position: absolute; inset: 24px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.hero-card-top {
  display: flex; justify-content: space-between; align-items: flex-start;
}
.hero-card-status {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 100px;
  background: rgba(35,180,113,.15); border: 1px solid rgba(35,180,113,.35);
  color: #58D29E; font-size: 12px; font-weight: 500;
}
.hero-card-status::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: #58D29E; box-shadow: 0 0 10px #58D29E;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}
.hero-card-id { font-family: ui-monospace, monospace; font-size: 11px; color: rgba(255,255,255,.5); letter-spacing: 1px; }
.hero-card-icon {
  width: 96px; height: 96px; margin: auto;
  display: grid; place-items: center;
  color: var(--c-accent); opacity: .9;
}
.hero-card-icon svg { width: 100%; height: 100%; filter: drop-shadow(0 8px 24px rgba(255,107,53,.4)); }
.hero-card-meta {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
}
.hero-card-meta-item {
  padding: 10px; border-radius: var(--r-sm);
  background: rgba(0,0,0,.2); border: 1px solid rgba(255,255,255,.08);
}
.hero-card-meta-label { font-size: 10px; color: rgba(255,255,255,.5); margin-bottom: 4px; letter-spacing: .5px; }
.hero-card-meta-value { font-size: 14px; font-weight: 600; color: #fff; }

/* ============ Section common ============ */
.section { padding: 96px 0; }
.section-tag {
  display: inline-block; padding: 6px 14px; border-radius: 100px;
  background: var(--c-primary-soft); color: var(--c-primary-3);
  font-size: 13px; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 3vw, 40px); font-weight: 800; color: var(--c-primary);
  letter-spacing: -.5px; line-height: 1.2; margin-bottom: 12px;
}
.section-desc { font-size: 16px; color: var(--c-text-2); max-width: 640px; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .section-desc { margin: 0 auto; }

/* 服务 6 卡片 */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.svc-card {
  position: relative; padding: 32px 28px; border-radius: var(--r-lg);
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  transition: all .25s;
  overflow: hidden;
}
.svc-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: linear-gradient(180deg, var(--c-accent), var(--c-accent-dark));
  opacity: 0; transition: opacity .25s;
}
.svc-card:hover {
  transform: translateY(-4px); box-shadow: var(--sh-3); border-color: transparent;
}
.svc-card:hover::before { opacity: 1; }
.svc-card-icon {
  width: 56px; height: 56px; border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--c-primary-soft), #fff);
  display: grid; place-items: center;
  margin-bottom: 24px;
  color: var(--c-primary); border: 1px solid var(--c-line);
}
.svc-card:hover .svc-card-icon {
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-dark));
  color: #fff; border-color: transparent;
}
.svc-card-icon svg { width: 28px; height: 28px; }
.svc-card h3 { font-size: 19px; font-weight: 700; color: var(--c-primary); margin-bottom: 12px; }
.svc-card p { font-size: 14px; color: var(--c-text-2); line-height: 1.7; }
.svc-card-link {
  margin-top: 20px; display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--c-accent);
}
.svc-card-link svg { width: 14px; height: 14px; transition: transform .2s; }
.svc-card:hover .svc-card-link svg { transform: translateX(4px); }

/* 深色数据带 */
.stats-band {
  background:
    linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
  color: #fff; padding: 64px 0;
  position: relative; overflow: hidden;
}
.stats-band::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 30% 50%, rgba(255,107,53,.15), transparent 40%),
    radial-gradient(circle at 70% 50%, rgba(31,77,133,.4), transparent 40%);
}
.stats-grid { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats-item { padding: 8px; }
.stats-num {
  font-size: clamp(40px, 5vw, 56px); font-weight: 800; letter-spacing: -2px;
  background: linear-gradient(180deg, #fff 0%, #B8C9D8 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats-num .unit { color: var(--c-accent); -webkit-text-fill-color: var(--c-accent); }
.stats-label { font-size: 15px; color: rgba(255,255,255,.7); margin-top: 8px; }

/* 案例 */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  border-radius: var(--r-lg); overflow: hidden;
  background: var(--c-bg); border: 1px solid var(--c-line);
  transition: all .25s;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--sh-3); border-color: transparent; }
.case-img {
  aspect-ratio: 16/10; background: linear-gradient(135deg, var(--c-primary-soft), var(--c-bg-3));
  position: relative; overflow: hidden;
}
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-badge {
  position: absolute; top: 16px; left: 16px;
  padding: 4px 12px; border-radius: 100px;
  background: rgba(255,255,255,.92); color: var(--c-primary);
  font-size: 12px; font-weight: 600; backdrop-filter: blur(6px);
}
.case-body { padding: 24px; }
.case-body h3 { font-size: 17px; font-weight: 700; color: var(--c-primary); margin-bottom: 8px; }
.case-body p { font-size: 14px; color: var(--c-text-2); line-height: 1.6; }
.case-meta { display: flex; gap: 16px; margin-top: 16px; font-size: 12px; color: var(--c-text-3); }
.case-meta span { display: inline-flex; align-items: center; gap: 4px; }

/* 品牌 logo 区 */
.brands { background: var(--c-bg-2); }
.brands-grid {
  display: grid; grid-template-columns: repeat(9, 1fr); gap: 12px;
}
.brand-item {
  aspect-ratio: 16/9; display: grid; place-items: center;
  background: #fff; border-radius: var(--r-md);
  border: 1px solid var(--c-line);
  padding: 16px; transition: all .2s;
}
.brand-item:hover { box-shadow: var(--sh-2); transform: translateY(-2px); }
.brand-name-cn { font-size: 15px; font-weight: 700; color: var(--c-primary); }
.brand-name-en { font-size: 11px; color: var(--c-text-3); letter-spacing: 1px; margin-top: 2px; }
.brand-text { text-align: center; }

/* CTA 横幅 */
.cta-band {
  padding: 80px 0; background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent-dark) 100%);
  color: #fff; text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 30% 30%, rgba(255,255,255,.15), transparent 40%);
}
.cta-band > .container { position: relative; }
.cta-band h2 { font-size: clamp(28px, 3vw, 36px); font-weight: 800; margin-bottom: 16px; letter-spacing: -.5px; }
.cta-band p { font-size: 16px; opacity: .9; margin-bottom: 32px; }
.cta-band .btn-primary { background: #fff; color: var(--c-accent-dark); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.cta-band .btn-primary:hover { background: var(--c-primary); color: #fff; }

/* 智库引导 */
.knowledge-band {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px;
  align-items: center;
  padding: 48px;
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--c-primary-soft) 0%, #fff 100%);
  border: 1px solid var(--c-line);
}
.knowledge-band h3 { font-size: 28px; font-weight: 800; color: var(--c-primary); margin-bottom: 12px; }
.knowledge-band p { font-size: 15px; color: var(--c-text-2); margin-bottom: 24px; }

/* Footer */
.site-footer { background: var(--c-primary); color: rgba(255,255,255,.7); padding: 64px 0 24px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand p { margin-top: 16px; line-height: 1.7; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a:hover { color: var(--c-accent); }
.footer-contact-item { display: flex; gap: 10px; margin-bottom: 14px; align-items: flex-start; }
.footer-contact-item svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 4px; color: var(--c-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: rgba(255,255,255,.5);
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: #fff; }

/* 响应式 */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 380px; margin: 0 auto; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .brands-grid { grid-template-columns: repeat(5, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .section { padding: 64px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .services-grid, .cases-grid { grid-template-columns: 1fr; }
  .brands-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .hero { padding: 64px 0 56px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .knowledge-band { grid-template-columns: 1fr; padding: 32px; }
}