/* ============================================================
   新能高压电气 Xinneng High Voltage · 企业官网样式
   配色：红 / 白 / 灰（改配色只需改 :root 变量）
   ============================================================ */

:root {
  --red: #c8102e;
  --red-dark: #a30d25;
  --red-soft: #fbecee;
  --ink: #2c2c30;
  --gray: #6e6e76;
  --gray-light: #9b9ba3;
  --line: #e6e6e9;
  --bg-soft: #f6f6f7;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 2px 16px rgba(44, 44, 48, 0.08);
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dark); }

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- 双语切换 ---------- */
body.en .zh { display: none !important; }
body:not(.en) .en { display: none !important; }

.lang-toggle {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}
.lang-toggle:hover { border-color: var(--red); color: var(--red); }

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: var(--ink);
  color: #cfcfd4;
  font-size: 13px;
}
.topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 7px 20px;
  max-width: var(--max);
  margin: 0 auto;
  flex-wrap: wrap;
}
.topbar a { color: #cfcfd4; }
.topbar a:hover { color: #fff; }
.topbar__group { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 11px;
  background: var(--red);
  color: #fff;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 1px;
}
.logo__text {
  font-weight: 700;
  font-size: 21px;
  color: var(--ink);
  line-height: 1.25;
  display: flex;
  flex-direction: column;
}
.logo__text small { display: block; margin-top: 2px; font-size: 11px; color: var(--gray-light); font-weight: 500; letter-spacing: .5px; white-space: nowrap; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav > a {
  color: var(--ink);
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all .2s;
}
.nav > a:hover { background: var(--bg-soft); color: var(--red); }
.nav > a.is-active { color: var(--red); font-weight: 600; }
.nav__cta { margin-left: 6px; }

.btn {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .2s;
  text-align: center;
}
.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover { background: var(--red-dark); color: #fff; }
.btn--ghost { border-color: rgba(255,255,255,.75); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn--outline { border-color: var(--red); color: var(--red); background: transparent; }
.btn--outline:hover { background: var(--red); color: #fff; }

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background: var(--ink);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .55;
}
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(163,13,37,.82) 0%, rgba(44,44,48,.55) 55%, rgba(44,44,48,.25) 100%);
}
.hero__inner {
  position: relative;
  padding: 110px 20px 120px;
  max-width: var(--max);
  margin: 0 auto;
}
.hero__brand {
  display: inline-block;
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 3px solid rgba(255, 255, 255, .88);
  color: #fff;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  letter-spacing: .6px;
  line-height: 1.3;
}
.hero__brand small {
  display: block;
  margin-top: 7px;
  font-size: .5em;
  font-weight: 500;
  letter-spacing: 1.8px;
  color: rgba(255, 255, 255, .85);
}
.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4.6vw, 52px);
  line-height: 1.25;
  font-weight: 800;
}
.hero p.lead {
  margin: 0 0 30px;
  font-size: clamp(16px, 2vw, 19px);
  max-width: 640px;
  color: rgba(255,255,255,.92);
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__chips { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 34px; }
.chip {
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 13.5px;
  color: rgba(255,255,255,.95);
}

/* ---------- 通用 section ---------- */
.section { padding: 76px 0; }
.section--soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin: 0 auto 44px; text-align: center; }
.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
}
.section-head h2 em { font-style: normal; color: var(--red); }
.section-head p { margin: 0; color: var(--gray); }
.kicker {
  display: inline-block;
  color: var(--red);
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* ---------- 数据条 ---------- */
.stats { background: var(--red); color: #fff; }
.stats__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 20px;
  text-align: center;
}
.stat__num { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.2; }
.stat__label { font-size: 14px; color: rgba(255,255,255,.9); margin-top: 4px; }

/* ---------- 产品卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid--products { grid-template-columns: repeat(3, 1fr); }
.grid--features { grid-template-columns: repeat(4, 1fr); }

.pcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.pcard:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.pcard__imgwrap {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 210px;
}
.pcard__imgwrap img { max-height: 178px; width: auto; max-width: 100%; object-fit: contain; }
.pcard__body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.pcard__body h3 { margin: 0; font-size: 17.5px; font-weight: 700; }
.pcard__body h3 .en { color: var(--gray); font-weight: 500; font-size: 13px; display: block; }
.pcard__body p { margin: 0; color: var(--gray); font-size: 14.5px; flex: 1; }
.pcard__more { font-weight: 600; font-size: 14px; }

/* 产品详情区（products 页） */
.cats { display: flex; flex-direction: column; gap: 40px; }
.cat {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 34px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.cat:nth-child(even) { grid-template-columns: 1fr 380px; }
.cat:nth-child(even) .cat__imgwrap { order: 2; }
.cat__imgwrap {
  background: #fff;
  border-right: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  min-height: 260px;
}
.cat:nth-child(even) .cat__imgwrap { border-right: 0; border-left: 1px solid var(--line); }
.cat__imgwrap img { max-height: 230px; width: auto; max-width: 100%; object-fit: contain; }
.cat__body { padding: 26px 30px; }
.cat__body h3 { margin: 0 0 4px; font-size: 20px; font-weight: 800; }
.cat__body .sub { color: var(--gray-light); font-size: 13.5px; margin: 0 0 12px; }
.cat__body p { margin: 0 0 14px; color: var(--gray); font-size: 15px; }
.spec-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.spec-chips span {
  background: var(--red-soft);
  color: var(--red-dark);
  border-radius: 6px;
  padding: 3px 12px;
  font-size: 13px;
  font-weight: 600;
}

/* ---------- 特性 ---------- */
.feature {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  text-align: center;
}
.feature__icon { font-size: 30px; margin-bottom: 10px; }
.feature h3 { margin: 0 0 8px; font-size: 16.5px; font-weight: 700; }
.feature p { margin: 0; color: var(--gray); font-size: 14px; }

/* ---------- 优势条（红底反白） ---------- */
.band {
  background: linear-gradient(120deg, var(--red) 0%, var(--red-dark) 100%);
  color: #fff;
  text-align: center;
  padding: 60px 20px;
}
.band h2 { margin: 0 0 10px; font-size: clamp(22px, 3vw, 30px); font-weight: 800; }
.band p { margin: 0 0 26px; color: rgba(255,255,255,.9); }
.band .btn { background: #fff; color: var(--red); }
.band .btn:hover { background: var(--red-soft); color: var(--red-dark); }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.about-grid .prose p { color: var(--gray); margin: 0 0 16px; font-size: 15.5px; }
.about-grid .prose strong { color: var(--ink); }
.cert-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.cert-card img { margin: 0 auto 14px; max-height: 260px; width: auto; }
.cert-list { list-style: none; margin: 0; padding: 0; text-align: left; }
.cert-list li {
  padding: 9px 0 9px 26px;
  border-bottom: 1px dashed var(--line);
  position: relative;
  font-size: 14.5px;
  color: var(--gray);
}
.cert-list li:last-child { border-bottom: 0; }
.cert-list li::before {
  content: "✓";
  position: absolute;
  left: 2px;
  color: var(--red);
  font-weight: 800;
}

.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 40px; }
.value {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
}
.value h3 { margin: 0 0 6px; font-size: 15.5px; color: var(--red-dark); font-weight: 700; }
.value p { margin: 0; font-size: 13.5px; color: var(--gray); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 36px; align-items: start; }
.contact-cards { display: flex; flex-direction: column; gap: 16px; }
.ccard {
  display: flex;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.ccard__icon {
  flex: 0 0 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--red-soft);
  color: var(--red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}
.ccard h3 { margin: 0 0 2px; font-size: 14px; color: var(--gray-light); font-weight: 600; }
.ccard p { margin: 0; font-weight: 600; font-size: 15.5px; word-break: break-all; }

.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form .full { grid-column: 1 / -1; }
.form label { font-size: 13.5px; font-weight: 600; color: var(--ink); display: block; margin-bottom: 6px; }
.form input, .form select, .form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 13px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: var(--white);
  transition: border-color .2s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none;
  border-color: var(--red);
}
.form textarea { min-height: 130px; resize: vertical; }
.form .btn { width: 100%; }
.form-note { font-size: 13px; color: var(--gray-light); margin: 10px 0 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: #b9b9c0; font-size: 14px; }
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 36px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 20px 40px;
}
.footer__inner h4 { color: #fff; margin: 0 0 14px; font-size: 15.5px; }
.footer__inner h4 small {
  display: block;
  margin-top: 5px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 1.2px;
  color: rgba(255, 255, 255, .68);
}
.footer__inner p { margin: 0 0 8px; }
.footer__inner a { color: #b9b9c0; display: block; padding: 3px 0; }
.footer__inner a:hover { color: #fff; }
.footer__bar {
  border-top: 1px solid rgba(255,255,255,.12);
  text-align: center;
  padding: 16px 20px;
  font-size: 13px;
  color: #8a8a92;
}

/* ---------- 页面 hero（内页顶部条） ---------- */
.page-hero {
  background: linear-gradient(120deg, var(--red-dark), var(--red));
  color: #fff;
  padding: 64px 0;
  text-align: center;
}
.page-hero .page-hero__brand {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: rgba(255, 255, 255, .95);
}
.page-hero .page-hero__brand small {
  display: block;
  margin-top: 6px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 1.9px;
  color: rgba(255, 255, 255, .78);
}
.page-hero h1 { margin: 0 0 8px; font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; }
.page-hero p { margin: 0; color: rgba(255,255,255,.9); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid--products { grid-template-columns: repeat(2, 1fr); }
  .grid--features, .values { grid-template-columns: repeat(2, 1fr); }
  .cat, .cat:nth-child(even) { grid-template-columns: 1fr; }
  .cat:nth-child(even) .cat__imgwrap { order: 0; }
  .cat__imgwrap, .cat:nth-child(even) .cat__imgwrap {
    border-right: 0; border-left: 0; border-bottom: 1px solid var(--line);
  }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .topbar__group span { display: none; }
  .grid--products, .grid--features, .values { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 24px; }
  .stats__inner { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { padding: 76px 20px 84px; }
  .nav-toggle { display: inline-block; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 18px;
    box-shadow: var(--shadow);
  }
  .nav.is-open { display: flex; }
  .nav > a { padding: 12px 10px; border-radius: 8px; }
}