/* =========================================================
   华彰智电(上海)技术有限公司企业官网 — 全站样式
   主题：白底黑字 · 国网绿点缀
   说明：本文件为共享样式，所有页面引用。
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  /* 品牌点缀色：国网森绿（全站统一，与 footer 同色 #004d2e） */
  --green-900: #004d2e;
  --green-800: #004d2e;
  --green-700: #004d2e;
  --green-600: #004d2e;
  --green-500: #004d2e;
  --green-400: #004d2e;
  --green-300: #004d2e;
  --green-100: #dcf3e3; /* 浅绿底：聚焦光圈，非文字色 */
  --green-50:  #eef9f1; /* 浅绿底：实力区/悬停底，非文字色 */

  /* 中性色 */
  --ink-900: #0a0a0a;
  --ink-800: #171717;
  --ink-700: #262626;
  --ink-600: #404040;
  --ink-500: #525252;
  --ink-400: #737373;
  --line:    #e5e5e5;
  --bg:      #ffffff;
  --bg-soft: #f5f5f5;
  --bg-deep: #f5f5f5;

  /* 排版 */
  --maxw: 1200px;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(15,23,42,.08), 0 1px 2px rgba(15,23,42,.04);
  --shadow-md: 0 8px 24px rgba(15,23,42,.10);
  --shadow-lg: 0 18px 48px rgba(0,0,0,.08);
  --ff: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff);
  color: var(--ink-800);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.25; color: var(--ink-900); font-weight: 700; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--soft { background: var(--bg-soft); }
.section__foot { display: block; text-align: right; margin-top: 32px; }
.section__more {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--green-900); font-weight: 600; font-size: 15px;
  transition: gap .2s ease;
}
.section__more:hover { gap: 12px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600;
  font-size: 15px; cursor: pointer; border: 1.5px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: linear-gradient(135deg, var(--green-700), var(--green-600)); color: #fff; box-shadow: 0 8px 20px rgba(0,77,46,.18); }
.btn--ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.35); }
.btn--outline { background: transparent; color: var(--green-700); border-color: var(--green-500); }
.btn--outline:hover { background: var(--green-50); }
.btn--dark { background: var(--green-900); color: #fff; }
.btn--dark:hover { background: #006b3d; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand__logo { height: 64px; width: auto; max-width: none; flex: none; display: block; }
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-500); letter-spacing: .5px; }
.nav__menu { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav__menu a {
  padding: 9px 15px; border-radius: 8px; font-size: 15px; font-weight: 500;
  color: var(--ink-700); transition: background .15s, color .15s;
}
.nav__menu a:hover, .nav__menu a.is-active { background: #eef9f1; color: #004d2e; }
.lang { display: flex; align-items: center; gap: 4px; margin-left: 16px; font-size: 14px; flex: none; }
.lang__link { color: var(--ink-600); padding: 4px 7px; border-radius: 6px; transition: background .15s, color .15s; }
.lang__link:hover { background: var(--green-50); }
.lang__link.is-active { background: #eef9f1; color: var(--green-700); font-weight: 700; }
.lang__sep { color: var(--line); }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; width: 44px; height: 44px; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: var(--ink-800); margin: 5px auto; transition: .25s; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; aspect-ratio: 5120 / 1704; min-height: 420px; background: var(--bg-deep) url('../assets/hero-bg.webp') center / cover no-repeat; }
@media (max-width: 768px) { .hero { min-height: 320px; background-position: center bottom; } }

/* Hero 文案区（图片下方，不在图中） */
.hero__caption { text-align: center; padding: 54px 0 46px; background: #fff; border-bottom: 1px solid var(--line); }
.hero__caption .container { max-width: 960px; }
.hero__caption h1 { font-size: clamp(22px, 4vw, 36px); color: var(--green-700); line-height: 1.4; }
.hero__caption h1 .accent { color: var(--green-700); font-weight: 800; }
.hero__caption .hero__en { display: block; font-size: clamp(11px, 1.3vw, 14px); font-weight: 600; color: var(--green-700); margin-top: 12px; letter-spacing: .3px; white-space: nowrap; }

/* ---------- Section 标题 ---------- */
.section__head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section__head .kicker { color: var(--green-600); font-weight: 700; font-size: 14px; letter-spacing: 1px; text-transform: uppercase; }
.section__head h2 { font-size: clamp(26px, 3.4vw, 38px); margin: 10px 0 14px; }
.section__head p { color: var(--ink-500); font-size: 16px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); transition: transform .18s, box-shadow .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--green-300); }
.card__icon {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: var(--green-50); color: var(--green-600); margin-bottom: 18px;
}
.card__icon--logo { width: auto; min-width: 64px; padding: 0 10px; background: transparent; }
.card__logo { height: 44px; width: auto; object-fit: contain; display: block; }
.card__media { height: 140px; margin: -28px -28px 18px; border-radius: var(--radius) var(--radius) 0 0; overflow: hidden; }
.card__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--ink-500); font-size: 15px; }
.card__more { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--green-600); font-weight: 600; font-size: 14px; }
.card__more svg { transition: transform .2s; }
.card:hover .card__more svg { transform: translateX(4px); }


/* ---------- 解决方案预览 ---------- */
.solrow { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.solrow__media { background: var(--bg-soft); min-height: 280px; display: grid; place-items: center; color: var(--green-600); overflow: hidden; }
.solrow__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.solrow__media svg { width: 120px; height: 120px; opacity: .9; }
.solrow__body { padding: 40px; }
.solrow__body h3 { font-size: 22px; margin-bottom: 12px; }
.solrow__body p { color: var(--ink-500); margin-bottom: 18px; }

/* 首页 4 列解决方案卡片：紧凑上下布局 */
.grid--4 .solrow { grid-template-columns: 1fr; }
.grid--4 .solrow__media { min-height: 140px; }
.grid--4 .solrow__media svg { width: 64px; height: 64px; }
.grid--4 .solrow__media img { min-height: 140px; }
.grid--4 .solrow__body { padding: 24px; }
.grid--4 .solrow__body h3 { font-size: 18px; margin-bottom: 8px; }
.grid--4 .solrow__body p { font-size: 14px; line-height: 1.55; margin-bottom: 14px; }
.grid--4 .solrow__body .btn { font-size: 13px; padding: 8px 16px; }

/* ---------- 新闻列表 ---------- */
.news { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.newscard { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .18s, box-shadow .2s; display: flex; flex-direction: column; }
.newscard:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.newscard__thumb { height: 160px; background: var(--bg-soft); position: relative; overflow: hidden; }
.newscard__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.newscard:nth-child(1) .newscard__thumb { background: var(--bg-soft); }
.newscard:nth-child(2) .newscard__thumb { background: var(--bg-soft); }
.newscard:nth-child(3) .newscard__thumb { background: var(--bg-soft); }
.newscard__num { position: absolute; right: 14px; bottom: 4px; font-size: 64px; font-weight: 800; line-height: 1; color: rgba(0,77,46,.12); letter-spacing: -2px; user-select: none; z-index: 2; }
.newscard__tag { position: absolute; top: 14px; left: 14px; background: #fff; color: var(--green-700); font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); }
.newscard__body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.newscard__date { font-size: 13px; color: var(--ink-400); margin-bottom: 8px; }
.newscard__body h3 { font-size: 17px; margin-bottom: 10px; }
.newscard__body p { color: var(--ink-500); font-size: 14px; flex: 1; }
.newscard__more { margin-top: 14px; color: var(--green-600); font-weight: 600; font-size: 14px; }

/* ---------- 合作伙伴墙 ---------- */
.logowall { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; align-items: stretch; }
.logowall .logo {
  border: 1px solid var(--line); border-radius: 10px; display: flex; flex-direction: column;
  color: var(--green-900); font-size: 13px; font-weight: 700; background: #fff; text-align: center;
  transition: transform .15s, box-shadow .2s, border-color .2s; overflow: hidden;
}
.logowall .logo img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; border-radius: 9px 9px 0 0; }
.logowall .logo span { padding: 10px 6px 10px; line-height: 1.3; border-top: 1px solid var(--line); }
.logowall .logo svg { color: var(--green-500); }
.logowall .logo:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--green-300); }

/* ---------- CTA 区 ---------- */
.cta { background: var(--bg-soft); color: var(--ink-800); border: 1px solid var(--line); border-radius: var(--radius); padding: 56px; text-align: center; }
.cta h2 { color: var(--ink-900); font-size: 30px; margin-bottom: 12px; }
.cta p { color: var(--ink-500); margin-bottom: 26px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--green-900); color: rgba(255,255,255,.85); border-top: 0; padding: 32px 0 18px; }
.footer__grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1.6fr; gap: 24px; }
.footer h4 { color: #fff; font-size: 13px; margin-bottom: 10px; font-weight: 600; letter-spacing: .3px; }
.footer a { color: rgba(255,255,255,.85); font-size: 13px; display: block; padding: 3px 0; transition: color .15s; }
.footer a:hover { color: #fff; }
.footer__brand { display: flex; align-items: center; gap: 8px; color: #fff; font-weight: 700; font-size: 15px; margin-bottom: 8px; }
.footer__brand .brand__logo { height: 24px; width: auto; }
.footer p { font-size: 12px; color: rgba(255,255,255,.7); line-height: 1.6; }
.footer__copyright { margin-top: 10px; font-size: 12px; color: rgba(255,255,255,.7); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.2); margin-top: 18px; padding-top: 12px; font-size: 12px; color: rgba(255,255,255,.7); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ---------- 面包屑 ---------- */
.crumb { padding: 22px 0; font-size: 14px; color: var(--ink-400); }
.crumb a { color: var(--ink-500); }
.crumb a:hover { color: var(--green-600); }

/* ---------- 页面头图 ---------- */
/* ---------- 页面头图 ---------- */
.pagehero { background: #fff; color: var(--ink-800); border-bottom: 1px solid var(--line); padding: 64px 0; }
.pagehero h1 { color: var(--ink-900); font-size: clamp(28px, 4vw, 42px); }
.pagehero p { color: var(--ink-500); margin-top: 12px; max-width: 640px; }

/* 内页通用 hero 横幅：新能源场景大图 + 白字深阴影（产品中心及其他内页共用） */
.page-products .pagehero, .page-hero-banner .pagehero { background: url('../assets/products-hero-wide.jpg?v=2') center / cover no-repeat; color: #fff; border-bottom: 1px solid var(--line); aspect-ratio: 7.7 / 1; min-height: 170px; display: flex; align-items: center; padding: 0; }
.page-products .pagehero .container, .page-hero-banner .pagehero .container { width: 100%; }
.page-products .pagehero__text, .page-hero-banner .pagehero__text { padding: 18px 0; }
.page-products .pagehero h1, .page-hero-banner .pagehero h1 { color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,.4); }
.page-products .pagehero p, .page-hero-banner .pagehero p { color: rgba(255,255,255,.92); text-shadow: 0 1px 3px rgba(0,0,0,.4); max-width: 560px; }
.page-products .pagehero .crumb, .page-hero-banner .pagehero .crumb { color: rgba(255,255,255,.78); text-shadow: 0 1px 3px rgba(0,0,0,.4); }
.page-products .pagehero .crumb a, .page-hero-banner .pagehero .crumb a { color: rgba(255,255,255,.9); }
@media (max-width: 768px) {
  .page-products .pagehero, .page-hero-banner .pagehero { min-height: 150px; background-position: 70% center; }
}

/* ---------- 产品分类筛选 ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 40px; }
.filters button { padding: 9px 18px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink-600); font-size: 14px; font-weight: 500; cursor: pointer; transition: .18s; }
.filters button:hover { border-color: var(--green-400); color: var(--green-700); }
.filters button.is-active { background: var(--green-600); color: #fff; border-color: var(--green-600); }

/* 产品卡 */
.product { display: flex; flex-direction: column; }
.product__media { height: 150px; background: var(--bg-soft); border-radius: var(--radius-sm); margin-bottom: 18px; display: grid; place-items: center; color: var(--green-600); overflow: hidden; }
.product__media svg { width: 64px; height: 64px; opacity: .92; }
.product__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.product h3 { font-size: 18px; margin-bottom: 8px; }
.product p { color: var(--ink-500); font-size: 14px; flex: 1; }
.product__spec { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 12px; font-size: 13px; color: var(--ink-500); display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; }
.product__spec b { color: var(--ink-700); font-weight: 600; }

/* ---------- 时间轴（关于页） ---------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--green-400), var(--green-400)); }
.tl-item { position: relative; padding: 0 0 34px 26px; }
.tl-item::before { content: ""; position: absolute; left: -28px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--green-500); }
.tl-item .year { font-weight: 800; color: var(--green-700); font-size: 17px; }
.tl-item h3 { font-size: 17px; margin: 4px 0 6px; }
.tl-item p { color: var(--ink-500); font-size: 15px; }

/* 资质荣誉 */
.badges { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.badge { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; text-align: center; background: #fff; }
.badge__icon { width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 14px; background: var(--green-50); color: var(--green-600); display: grid; place-items: center; }
.badge__media { height: 130px; margin: -26px -26px 16px; border-radius: var(--radius) var(--radius) 0 0; overflow: hidden; }
.badge__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.badge h4 { font-size: 16px; margin-bottom: 6px; }
.badge p { font-size: 13px; color: var(--ink-400); }

/* ---------- 表单（联系页） ---------- */
.form { max-width: 640px; margin: 0 auto; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; color: var(--ink-700); }
.field label .req { color: #004d2e; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 15px; font-family: var(--ff); color: var(--ink-800); background: #fff; transition: border .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--green-500); box-shadow: 0 0 0 3px var(--green-100); }
.field textarea { resize: vertical; min-height: 130px; }
.field .err { color: #004d2e; font-size: 13px; margin-top: 5px; display: none; }
.field.has-error input, .field.has-error textarea { border-color: #004d2e; }
.field.has-error .err { display: block; }
.form__note { font-size: 13px; color: var(--ink-400); margin-top: 10px; text-align: center; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: stretch; margin-top: -30px; }
.contact-col { background: transparent; border: 0; border-radius: 0; padding: 0; box-shadow: none; }
.contact-col form { display: block; }
.contact-col--right { display: flex; flex-direction: column; background: transparent; border: 0; border-radius: 0; padding: 0; box-shadow: none; }
.info-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); margin-bottom: 12px; }
.info-card h4 { font-size: 16px; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.info-card h4 svg { color: var(--green-600); }
.info-card p { color: var(--ink-500); font-size: 15px; }
.map-box { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--bg-soft); margin-top: 12px; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.map-box img.map-img { display: block; width: 100%; height: auto; }
.map-pin { position: absolute; transform: translate(-50%, -100%); text-align: center; pointer-events: none; z-index: 2; }
.map-star { color: #c41f1f; font-size: 30px; line-height: 1; text-shadow: 0 1px 4px rgba(0,0,0,.25); }
.map-label { margin-top: 4px; background: rgba(255,255,255,.95); color: var(--green-900); padding: 5px 12px; border-radius: 6px; font-size: 12px; font-weight: 700; white-space: nowrap; box-shadow: 0 2px 10px rgba(0,0,0,.12); }

/* ---------- 占位提示条 ---------- */
.placeholder-note {
  background: #fffbeb; border: 1px solid #fde68a; color: #92400e;
  font-size: 13px; padding: 10px 16px; border-radius: var(--radius-sm); margin-bottom: 28px;
}

/* ---------- 返回顶部 ---------- */
.to-top { position: fixed; right: 22px; bottom: 22px; width: 46px; height: 46px; border-radius: 50%; background: var(--green-600); color: #fff; display: grid; place-items: center; box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; z-index: 40; }
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .news { grid-template-columns: repeat(2, 1fr); }
  .badges { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .logowall { grid-template-columns: repeat(3, 1fr); }
  .solrow { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .section { padding: 60px 0; }
  .nav__menu {
    position: absolute; top: 70px; left: 0; right: 0; background: #fff; flex-direction: column;
    align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); padding: 10px 16px 18px;
    display: none; box-shadow: var(--shadow-md);
  }
  .nav__menu.open { display: flex; }
  .nav__menu a { padding: 13px 12px; border-radius: 8px; }
  .nav__toggle { display: block; }
  .grid--3, .grid--4, .grid--2, .news, .badges { grid-template-columns: 1fr; }
  .logowall { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__caption { padding: 38px 0 32px; }
  .cta { padding: 38px 22px; }
}