/* ==========================================================================
   易智充官网样式表 | 深圳易智充科技有限公司 | www.easycharge.cc
   ========================================================================== */

:root {
  --color-primary: #16a34a;
  --color-primary-dark: #15803d;
  --color-primary-light: #dcfce7;
  --color-accent: #0ea5e9;
  --color-dark: #0f172a;
  --color-dark-2: #1e293b;
  --color-text: #334155;
  --color-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --radius: 14px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, .12);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: .25s ease;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

.container { width: min(1140px, 92%); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.site-header.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-logo { display: inline-flex; }
.brand-text { font-size: 22px; font-weight: 800; color: var(--color-dark); letter-spacing: 1px; }
.brand-text small { display: block; font-size: 10px; font-weight: 600; letter-spacing: 3px; color: var(--color-muted); margin-top: -2px; }

.main-nav { display: flex; gap: 6px; }
.main-nav .nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-dark-2);
  transition: color var(--transition), background var(--transition);
}
.main-nav .nav-link:hover { color: var(--color-primary); background: var(--color-primary-light); }
.main-nav .nav-link.active { color: var(--color-primary); font-weight: 700; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-dark); border-radius: 2px; transition: var(--transition); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(14, 165, 233, .35), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(22, 163, 74, .45), transparent 55%),
    linear-gradient(135deg, #0f172a 0%, #134e4a 55%, #064e3b 100%);
}
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at center, #000 40%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 40%, transparent 78%);
}
.hero-content { position: relative; z-index: 1; padding: 120px 0 80px; }

.hero-eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 2px;
  background: rgba(255,255,255,.08);
  margin-bottom: 20px;
}
.hero h1 { font-size: clamp(34px, 5vw, 54px); font-weight: 800; line-height: 1.2; margin-bottom: 18px; }
.hero-sub { max-width: 640px; font-size: 17px; color: rgba(255,255,255,.82); margin-bottom: 34px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(22, 163, 74, .35); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; transform: translateY(-2px); }

.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.stat strong { display: block; font-size: 26px; font-weight: 800; color: #fff; }
.stat span { font-size: 14px; color: rgba(255,255,255,.72); }

/* ---------- 通用 Section ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); color: var(--color-dark); font-weight: 800; margin-bottom: 12px; }
.section-head p { color: var(--color-muted); font-size: 16px; }

/* ---------- 公司介绍 ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.about-text h3 { font-size: 26px; color: var(--color-dark); margin-bottom: 16px; }
.about-text p { margin-bottom: 14px; font-size: 16px; }
.about-text b { color: var(--color-primary-dark); }
.about-list { margin-top: 18px; }
.about-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 15px;
}
.about-list li::before {
  content: "";
  position: absolute; left: 0; top: 9px;
  width: 12px; height: 12px;
  border-radius: 4px;
  background: var(--color-primary-light);
  border: 2px solid var(--color-primary);
}
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.about-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.about-card h4 { font-size: 13px; color: var(--color-muted); font-weight: 600; margin-bottom: 6px; }
.about-card p { font-size: 15px; color: var(--color-dark); font-weight: 600; }

/* ---------- 卡片网格 ---------- */
.card-grid { display: grid; gap: 22px; }
.business-grid { grid-template-columns: repeat(4, 1fr); }
.solution-grid { grid-template-columns: repeat(4, 1fr); }
.mode-grid { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(22, 163, 74, .4); }
.card-icon {
  width: 56px; height: 56px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 14px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; color: var(--color-dark); margin-bottom: 10px; }
.card h4 { font-size: 17px; color: var(--color-dark); margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--color-muted); }

.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.card-tags li {
  font-size: 12px;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---------- 产品列表 ---------- */
.product-list { display: flex; flex-direction: column; gap: 22px; }
.product-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 170px;
  gap: 28px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 30px 32px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.product-row:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.product-info h3 { font-size: 22px; color: var(--color-dark); margin-bottom: 10px; }
.product-info > p { color: var(--color-muted); margin-bottom: 14px; }
.product-features { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; }
.product-features li { position: relative; padding-left: 20px; font-size: 14px; }
.product-features li::before {
  content: "✓";
  position: absolute; left: 0; top: 0;
  color: var(--color-primary);
  font-weight: 700;
}
.product-badge {
  text-align: center;
  padding: 12px 10px;
  border-radius: 12px;
  background: linear-gradient(135deg, #16a34a, #0ea5e9);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
}

/* ---------- 解决方案 ---------- */
.solution-block { margin-top: 48px; }
.solution-block h3 { font-size: 24px; color: var(--color-dark); text-align: center; margin-bottom: 24px; }

.process-list {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
  counter-reset: step;
}
.process-list li {
  counter-increment: step;
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px 12px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.process-list li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}
.process-list strong { display: block; font-size: 14.5px; color: var(--color-dark); margin-bottom: 4px; }
.process-list span { font-size: 12px; color: var(--color-muted); }

/* ---------- 安全保障 ---------- */
.safety-wrap { max-width: 960px; margin: 0 auto; }
.safety-intro { text-align: center; margin-bottom: 32px; }
.safety-intro h3 { font-size: 24px; color: var(--color-dark); margin-bottom: 10px; }
.safety-intro p { color: var(--color-muted); max-width: 720px; margin: 0 auto; }
.safety-grid { grid-template-columns: repeat(4, 1fr); }
.safety-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), border-color var(--transition);
}
.safety-item:hover { transform: translateY(-4px); border-color: rgba(22, 163, 74, .4); }
.safety-item-head { display: flex; justify-content: center; gap: 8px; font-size: 18px; font-weight: 600; }
.safety-icon { display: block; }
.safety-item strong { display: block; font-size: 17px; color: var(--color-dark); margin-bottom: 6px; }
.safety-item span { font-size: 13px; color: var(--color-muted); }
.safety-note {
  margin-top: 28px;
  background: var(--color-primary-light);
  border: 1px solid rgba(22, 163, 74, .25);
  border-radius: var(--radius);
  padding: 18px 22px;
  font-size: 14.5px;
  color: var(--color-primary-dark);
}

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.contact-info h3 { font-size: 24px; color: var(--color-dark); margin-bottom: 20px; }
.contact-list li { padding: 10px 0; border-bottom: 1px dashed var(--color-border); font-size: 15px; }
.contact-list li:last-child { border-bottom: 0; }
.contact-list span { display: inline-block; min-width: 88px; color: var(--color-muted); font-size: 14px; }
.contact-list a { color: var(--color-primary); font-weight: 600; }
.contact-list a:hover { text-decoration: underline; }

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; color: var(--color-dark); margin-bottom: 8px; }
.form-row input, .form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--color-dark);
  background: var(--color-bg-alt);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, .12);
  background: #fff;
}
.contact-form .btn { width: 100%; }
.form-tip { margin-top: 14px; font-size: 13px; color: var(--color-muted); text-align: center; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--color-dark); color: rgba(255,255,255,.7); padding: 48px 0 24px; }
.footer-wrap { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; flex-wrap: wrap; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-logo { font-size: 20px; font-weight: 800; color: #fff; letter-spacing: 1px; }
.footer-logo small { font-size: 11px; font-weight: 500; letter-spacing: 3px; margin-left: 6px; color: rgba(255,255,255,.5); }
.footer-brand p:last-child { font-size: 13.5px; margin-top: 6px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { font-size: 14px; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 20px; font-size: 13.5px; }
.footer-bottom a { color: rgba(255,255,255,.85); }
.footer-bottom a:hover { color: #fff; text-decoration: underline; }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .business-grid, .solution-grid, .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .process-list { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    background: #fff;
    padding: 12px 6%;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav .nav-link { padding: 12px 14px; }

  .hero { min-height: auto; }
  .hero-content { padding: 120px 0 60px; }
  .hero-stats { gap: 24px; }

  .section { padding: 64px 0; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .product-row { grid-template-columns: 1fr; }
  .product-badge { text-align: left; padding: 10px 14px; }
  .product-features { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .mode-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 560px) {
  .business-grid, .solution-grid, .safety-grid { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: 1fr; }
}

/* ---------- 官网配图样式 ---------- */
.brand-logo { display: block; width: auto; height: 48px; border-radius: 6px; object-fit: contain; }
.about-image { margin-top: 34px; }
.about-image img { width: 100%; max-height: 480px; object-fit: cover; border-radius: 16px; box-shadow: var(--shadow-lg); }
.about-image figcaption { text-align: center; color: var(--color-muted); font-size: 13.5px; margin-top: 10px; }
.product-row { grid-template-columns: 1.3fr 0.7fr; }
.product-media { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.product-media img { width: 100%; max-height: 330px; object-fit: cover; border-radius: 14px; box-shadow: var(--shadow-md); }
.product-badge { width: 100%; box-sizing: border-box; text-align: center; }
.scene-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 20px; }
.scene-item { margin: 0; }
.scene-item img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 14px; box-shadow: var(--shadow-md); }
.scene-item figcaption { text-align: center; font-size: 13.5px; color: var(--color-muted); margin-top: 8px; }
.mode-card img { width: 100%; border-radius: 12px; box-shadow: var(--shadow-sm); margin-bottom: 12px; }
.service-flow-img { width: 100%; border-radius: 14px; box-shadow: var(--shadow-md); margin-bottom: 20px; }
.safety-image { margin-bottom: 26px; }
.safety-image img { width: 100%; max-height: 420px; object-fit: cover; border-radius: 14px; box-shadow: var(--shadow-md); }
.safety-image figcaption { text-align: center; font-size: 13.5px; color: var(--color-muted); margin-top: 8px; }
.footer-logo img { width: 34px; height: 28px; vertical-align: -5px; border-radius: 4px; }

@media (max-width: 768px) {
  .product-row { grid-template-columns: 1fr; }
  .product-media { order: -1; }
  .scene-gallery { grid-template-columns: 1fr; }
}