/* =========================================================
   无锡臻于至科技有限公司 官网设计稿样式
   Wuxi Reachtop Technology Co., Ltd. — Website Mockup
   风格：工业科技蓝 · 深蓝渐变 · 中英双语 · 响应式
   ========================================================= */

:root {
  --blue-900: #071b3d;      /* 最深蓝(页脚/深色块) */
  --blue-800: #0a2a5e;      /* 深蓝 */
  --blue-700: #0d3e8c;      /* 主品牌蓝 */
  --blue-600: #1458b3;      /* 亮蓝 */
  --blue-500: #1e6fd9;      /* 点缀亮蓝 */
  --blue-400: #4d96ea;      /* 浅亮蓝 */
  --cyan-500: #2aa9c9;      /* 青蓝点缀(电镀液/科技) */
  --gold-500: #c9a45c;      /* 金属金点缀 */
  --ink-900: #1a2332;       /* 主文字 */
  --ink-600: #4a5568;       /* 次级文字 */
  --ink-400: #8a94a6;       /* 弱文字 */
  --bg-soft: #f4f6fb;       /* 浅灰蓝底 */
  --bg-white: #ffffff;
  --line: #e3e8f0;

  --shadow-sm: 0 2px 8px rgba(10, 42, 94, .08);
  --shadow-md: 0 10px 30px rgba(10, 42, 94, .12);
  --shadow-lg: 0 20px 50px rgba(7, 27, 61, .22);
  --radius: 14px;

  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-en: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  color: var(--ink-900);
  background: var(--bg-white);
  line-height: 1.85;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ---------- 通用标题 ---------- */
.section { padding: 112px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-800) 55%, var(--blue-700) 100%);
  color: #fff;
}
.section-head { text-align: center; margin-bottom: 64px; }
.section-head .en {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--blue-500);
  font-weight: 600;
  margin-bottom: 12px;
}
.section--dark .section-head .en { color: var(--blue-400); }
.section-head h2 {
  font-size: 38px;
  font-weight: 700;
  letter-spacing: .06em;
}
.section-head .line {
  width: 56px; height: 3px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan-500));
  margin: 20px auto 0;
  border-radius: 2px;
}
.section-head.desc p {
  margin-top: 20px; color: var(--ink-600);
  max-width: 760px; margin-left: auto; margin-right: auto;
}
.section--dark .section-head.desc p { color: rgba(255,255,255,.78); }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(7, 27, 61, .86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.09);
  transition: background .3s, box-shadow .3s;
}
.header.scrolled { background: rgba(7, 27, 61, .97); box-shadow: 0 6px 24px rgba(0,0,0,.25); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo .mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-500));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: 0 4px 14px rgba(30, 111, 217, .45);
}
.logo .name { color: #fff; line-height: 1.2; }
.logo .name .cn { font-size: 18px; font-weight: 700; letter-spacing: .12em; }
.logo .name .en {
  font-family: var(--font-en);
  font-size: 10.5px; letter-spacing: .24em;
  color: rgba(255,255,255,.72); text-transform: uppercase;
}
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; padding: 0 16px; border-radius: 8px;
  color: rgba(255,255,255,.86);
  font-size: 15px; line-height: 1; letter-spacing: .04em;
  white-space: nowrap;
  transition: color .2s, background .2s;
}
.nav a:hover, .nav a.active { color: #fff; background: rgba(255,255,255,.10); }
.header-tel {
  display: flex; align-items: center; gap: 10px;
  color: #fff; padding-left: 20px; border-left: 1px solid rgba(255,255,255,.18);
  line-height: 1.2;
}
.header-tel .label { font-size: 11px; color: rgba(255,255,255,.6); line-height: 1.2; }
.header-tel .num { font-family: var(--font-en); font-size: 17px; font-weight: 700; letter-spacing: .04em; line-height: 1.2; }
.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.25);
  background: transparent; border-radius: 8px; color: #fff; font-size: 20px; cursor: pointer;
}

/* ---------- Banner 轮播 ---------- */
.hero { position: relative; height: 92vh; min-height: 620px; overflow: hidden; }
.hero .slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1.1s ease;
  background-size: cover; background-position: center;
}
.hero .slide.active { opacity: 1; }
.hero .slide::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(7,27,61,.88) 0%, rgba(10,42,94,.62) 46%, rgba(10,42,94,.18) 78%, rgba(7,27,61,.35) 100%);
}
.slide { display: flex; align-items: center; }
.hero-content {
  position: relative; z-index: 5; width: 100%;
  display: flex; flex-direction: column; justify-content: center;
  max-width: 1240px; margin: 0 auto; padding: 0 32px;
}
.hero-content .eyebrow {
  display: inline-flex; align-items: center; gap: 12px; margin-bottom: 22px;
  color: #fff; font-size: 13px; letter-spacing: .34em;
  text-transform: uppercase; font-family: var(--font-en);
}
.hero-content .eyebrow::before { content: ""; width: 44px; height: 2px; background: var(--cyan-500); }
.hero-content h1 {
  color: #fff; font-size: clamp(34px, 5vw, 58px); font-weight: 800;
  letter-spacing: .05em; line-height: 1.25; margin-bottom: 18px;
}
.hero-content h1 .em { color: var(--cyan-500); }
.hero-content .sub {
  color: rgba(255,255,255,.85); font-size: 17px;
  max-width: 620px; line-height: 1.9; margin-bottom: 34px;
}
.hero-content .sub .en { display: block; font-family: var(--font-en); font-size: 13px; letter-spacing: .14em; color: rgba(255,255,255,.55); margin-top: 10px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 50px; font-size: 15px; font-weight: 600;
  letter-spacing: .06em; cursor: pointer; border: none;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-primary { background: linear-gradient(90deg, var(--blue-500), var(--cyan-500)); color: #fff; box-shadow: 0 8px 24px rgba(30,111,217,.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(30,111,217,.55); }
.btn-ghost { background: rgba(255,255,255,.10); color: #fff; border: 1px solid rgba(255,255,255,.5); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,.2); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--blue-600); border: 1.5px solid var(--blue-400); }
.btn-outline:hover { background: rgba(30,111,217,.08); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(30,111,217,.12); }

.hero-dots { position: absolute; bottom: 116px; left: 50%; transform: translateX(-50%); z-index: 6; display: flex; gap: 10px; }
.hero-dots button {
  width: 34px; height: 4px; border: none; border-radius: 2px; cursor: pointer;
  background: rgba(255,255,255,.35); transition: background .3s, width .3s;
}
.hero-dots button.active { background: var(--cyan-500); width: 54px; }
.hero-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 6;
  width: 48px; height: 48px; border-radius: 50%; border: 1px solid rgba(255,255,255,.35);
  background: rgba(7,27,61,.3); color: #fff; font-size: 18px; cursor: pointer;
  transition: background .2s;
}
.hero-arrow:hover { background: rgba(30,111,217,.6); }
.hero-arrow.prev { left: 28px; }
.hero-arrow.next { right: 28px; }

.scroll-hint {
  position: absolute; bottom: 128px; right: 34px; z-index: 6;
  writing-mode: vertical-rl; color: rgba(255,255,255,.5);
  font-size: 12px; letter-spacing: .3em;
}

/* ---------- 首页速览卡片 ---------- */
.overview { margin-top: -74px; position: relative; z-index: 20; }
.overview-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.ov-card {
  background: #fff; border-radius: var(--radius); padding: 36px 32px;
  box-shadow: var(--shadow-md); position: relative; overflow: hidden;
  transition: transform .25s, box-shadow .25s;
}
.ov-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--blue-500), var(--cyan-500));
  opacity: 0; transition: opacity .25s;
}
.ov-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.ov-card:hover::before { opacity: 1; }
.ov-card .num {
  font-family: var(--font-en); font-size: 44px; font-weight: 800;
  background: linear-gradient(120deg, var(--blue-500), var(--cyan-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1.15;
}
.ov-card h3 { font-size: 18px; margin: 16px 0 10px; letter-spacing: .04em; }
.ov-card p { color: var(--ink-600); font-size: 14px; line-height: 1.95; margin-top: 6px; }
.ov-card .en { font-family: var(--font-en); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-400); }

/* ---------- 公司简介 ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.about-copy .tag { color: var(--blue-500); font-size: 13px; letter-spacing: .3em; font-family: var(--font-en); text-transform: uppercase; }
.about-copy h2 { font-size: 34px; font-weight: 700; letter-spacing: .06em; margin: 14px 0 20px; }
.about-copy h2 span { color: var(--blue-600); }
.about-copy p { color: var(--ink-600); margin-bottom: 16px; text-align: justify; }
.about-copy p.en { font-family: var(--font-en); font-size: 13.5px; color: var(--ink-400); line-height: 1.9; }
.about-copy .slogan {
  display: inline-flex; align-items: center; gap: 14px;
  margin-top: 18px; padding: 14px 24px; border-radius: 12px;
  background: linear-gradient(120deg, rgba(30,111,217,.08), rgba(42,169,201,.12));
  border-left: 4px solid var(--blue-500);
}
.about-copy .slogan b { font-size: 17px; letter-spacing: .14em; color: var(--blue-800); }
.about-copy .slogan span { font-family: var(--font-en); font-size: 12px; letter-spacing: .1em; color: var(--ink-600); }

.about-media { position: relative; }
.about-media .main-img { border-radius: var(--radius); box-shadow: var(--shadow-lg); aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.about-media .frame { position: absolute; inset: 0; border-radius: var(--radius); border: 2px solid var(--blue-400); transform: translate(18px, 18px); z-index: -1; }
.about-badge {
  position: absolute; left: -26px; bottom: 34px;
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  color: #fff; padding: 20px 26px; border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.about-badge b { font-size: 30px; font-family: var(--font-en); display: block; letter-spacing: .02em; }
.about-badge span { font-size: 12.5px; opacity: .85; letter-spacing: .08em; }

/* 标语条 */
.band {
  background: linear-gradient(100deg, var(--blue-800), var(--blue-600) 60%, var(--cyan-500));
  color: #fff; padding: 44px 0; position: relative; overflow: hidden;
}
.band .container { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.band h3 { font-size: clamp(20px, 2.6vw, 28px); letter-spacing: .12em; font-weight: 700; }
.band h3 small { display: block; font-family: var(--font-en); font-size: 13px; letter-spacing: .2em; font-weight: 400; opacity: .75; margin-top: 8px; }
.band .items { display: flex; gap: 56px; }
.band .items div { text-align: center; position: relative; }
.band .items div:not(:last-child)::after { content: ""; position: absolute; right: -28px; top: 10px; bottom: 10px; width: 1px; background: rgba(255,255,255,.25); }
.band .items b { display: block; font-size: 22px; font-weight: 700; letter-spacing: .04em; }
.band .items span { font-size: 12px; opacity: .78; letter-spacing: .1em; }

/* ---------- 产品中心 ---------- */
.prod-nav { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.prod-nav button {
  padding: 11px 26px; border-radius: 50px; border: 1.5px solid var(--line);
  background: #fff; font-size: 15px; font-weight: 600; color: var(--ink-600);
  cursor: pointer; letter-spacing: .04em; transition: all .2s;
}
.prod-nav button:hover { border-color: var(--blue-500); color: var(--blue-500); }
.prod-nav button.active { background: linear-gradient(90deg, var(--blue-600), var(--blue-500)); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(30,111,217,.28); }

.prod-panel { display: none; }
.prod-panel.active { display: block; }

.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.prod-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid var(--line);
  transition: transform .25s, box-shadow .25s;
  display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.prod-card .thumb { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--bg-soft); }
.prod-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.prod-card:hover .thumb img { transform: scale(1.06); }
.prod-card .thumb::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(7,27,61,.5));
}
.prod-card .thumb .idx {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  font-family: var(--font-en); font-size: 12px; font-weight: 700;
  color: #fff; background: rgba(7,27,61,.55); backdrop-filter: blur(4px);
  padding: 4px 12px; border-radius: 30px; letter-spacing: .08em;
}
.prod-card .body { padding: 28px 30px 32px; display: flex; flex-direction: column; flex: 1; }
.prod-card .body h3 { font-size: 19px; letter-spacing: .05em; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.prod-card .body h3 .cn { color: var(--ink-900); }
.prod-card .body h3 .en-name {
  font-family: var(--font-en); font-size: 12px; color: var(--blue-500);
  letter-spacing: .06em; font-weight: 600;
}
.prod-card .body p { color: var(--ink-600); font-size: 14.5px; line-height: 2; margin-top: 14px; }
.prod-card .body .prod-quote {
  display: inline-block; margin-top: auto; padding-top: 18px; font-size: 14px; font-weight: 600;
  color: var(--blue-500); letter-spacing: .06em; transition: color .2s, padding-left .2s;
}
.prod-card .body .prod-quote:hover { color: var(--cyan-500); padding-left: 4px; }

/* 子分类大卡（金属/太阳能等） */
.subcat-card {
  display: grid; grid-template-columns: 0.95fr 1.25fr; gap: 0;
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: box-shadow .25s, transform .25s;
}
.subcat-card:hover { box-shadow: var(--shadow-md); }
.sc-media { position: relative; min-height: 360px; }
.sc-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.sc-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 62%, rgba(7,27,61,.55)); }
.sc-badges { position: absolute; left: 20px; bottom: 18px; z-index: 2; display: flex; gap: 10px; flex-wrap: wrap; }
.sc-badges span {
  background: rgba(7,27,61,.62); backdrop-filter: blur(4px); color: #fff;
  font-size: 13px; padding: 6px 16px; border-radius: 30px; letter-spacing: .04em;
  border: 1px solid rgba(255,255,255,.25);
}
.sc-body { padding: 40px 44px; display: flex; flex-direction: column; justify-content: center; }
.sc-body p { color: var(--ink-600); font-size: 15px; line-height: 2.05; text-align: justify; }
.sc-body p b { color: var(--blue-700); }
.sc-label {
  margin: 22px 0 14px; font-size: 12.5px; color: var(--ink-400);
  letter-spacing: .22em; display: flex; align-items: center; gap: 12px;
}
.sc-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* 工艺缩略图条 */
.process-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(118px, 1fr)); gap: 14px; }
.process-strip figure { position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 1/1; cursor: pointer; }
.process-strip figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.process-strip figure:hover img { transform: scale(1.1); }
.process-strip figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  background: linear-gradient(180deg, transparent, rgba(7,27,61,.85));
  color: #fff; font-size: 12.5px; text-align: center; padding: 18px 6px 8px;
  letter-spacing: .06em;
}
.process-strip figure em { display: block; font-style: normal; font-family: var(--font-en); font-size: 10px; opacity: .7; letter-spacing: .1em; }

/* 产品分类介绍块（金属/清洗/太阳能） */
.subcat { margin-bottom: 60px; }
.subcat:last-child { margin-bottom: 0; }
.subcat-head { display: flex; align-items: center; gap: 18px; margin-bottom: 26px; }
.subcat-head .tile {
  width: 48px; height: 48px; border-radius: 12px; flex: none;
  background: linear-gradient(135deg, var(--blue-600), var(--cyan-500));
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 20px;
  box-shadow: 0 6px 16px rgba(30,111,217,.3);
}
.subcat-head h3 { font-size: 23px; letter-spacing: .06em; }
.subcat-head p { font-size: 12.5px; color: var(--ink-400); font-family: var(--font-en); letter-spacing: .14em; text-transform: uppercase; margin-top: 2px; }
.subcat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }

/* 设备配置 */
.eq-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.eq-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid var(--line);
  transition: transform .25s, box-shadow .25s;
  display: flex; flex-direction: column;
}
.eq-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.eq-card .head { padding: 26px 30px 20px; display: flex; align-items: center; gap: 16px; border-bottom: 1px dashed var(--line); }
.eq-card .head .icon {
  width: 48px; height: 48px; border-radius: 12px; flex: none;
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 21px;
}
.eq-card .head h3 { font-size: 20px; letter-spacing: .06em; }
.eq-card .head span { display: block; font-family: var(--font-en); font-size: 11px; letter-spacing: .12em; color: var(--ink-400); text-transform: uppercase; margin-top: 2px; }
.eq-card .shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 18px 18px 6px; }
.eq-card .shots img { aspect-ratio: 1/1; object-fit: cover; border-radius: 10px; width: 100%; transition: transform .3s; }
.eq-card .shots img:hover { transform: scale(1.08); }
.eq-card ul { padding: 10px 30px 32px; flex: 1; }
.eq-card li { padding: 10px 0 10px 24px; position: relative; color: var(--ink-600); font-size: 15px; border-bottom: 1px dotted var(--line); line-height: 1.9; }
.eq-card li:last-child { border-bottom: none; }
.eq-card li::before {
  content: ""; position: absolute; left: 0; top: 19px;
  width: 8px; height: 8px; border-radius: 2px; transform: rotate(45deg);
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-500));
}

/* ---------- 企业文化 ---------- */
.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.culture-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius); padding: 38px 32px; backdrop-filter: blur(4px);
  transition: background .25s, transform .25s, border-color .25s;
}
.culture-card:hover { background: rgba(255,255,255,.11); transform: translateY(-5px); border-color: rgba(255,255,255,.28); }
.culture-card .no { font-family: var(--font-en); font-size: 13px; letter-spacing: .24em; color: var(--cyan-500); font-weight: 700; }
.culture-card h3 { font-size: 21px; margin: 12px 0 8px; letter-spacing: .1em; }
.culture-card .en-name { font-family: var(--font-en); font-size: 12.5px; color: rgba(255,255,255,.55); letter-spacing: .08em; margin-bottom: 16px; }
.culture-card p { color: rgba(255,255,255,.8); font-size: 15px; line-height: 1.95; }

/* 联系我们卡片 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: stretch; }
.contact-items { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; box-shadow: var(--shadow-sm); transition: transform .2s, box-shadow .2s;
}
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.contact-card .icon {
  width: 46px; height: 46px; border-radius: 50%; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center; font-size: 19px;
  background: linear-gradient(135deg, rgba(30,111,217,.12), rgba(42,169,201,.16));
}
.contact-card h4 { font-size: 13px; color: var(--ink-400); letter-spacing: .16em; font-weight: 600; margin-bottom: 10px; }
.contact-card p { font-size: 15.5px; line-height: 1.85; }
.contact-card p a { color: var(--blue-600); }
.contact-map {
  background: linear-gradient(135deg, var(--blue-900), var(--blue-700));
  border-radius: var(--radius); color: #fff; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center; min-height: 300px;
}
.contact-map .hint { text-align: center; z-index: 2; position: relative; }
.contact-map .hint b { font-size: 22px; letter-spacing: .1em; display: block; margin-bottom: 10px; }
.contact-map .hint span { font-size: 13px; opacity: .8; letter-spacing: .06em; }
.contact-map svg.grid-bg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .16; }
.pin {
  position: absolute; left: 50%; top: 44%; transform: translate(-50%, -100%); z-index: 2;
  width: 30px; height: 30px; border-radius: 50% 50% 50% 0; transform-origin: bottom;
  background: var(--cyan-500); transform: rotate(-45deg) translate(20px, 12px);
  box-shadow: 0 6px 18px rgba(42,169,201,.5);
}
.pin::after { content: ""; position: absolute; left: 9px; top: 9px; width: 12px; height: 12px; border-radius: 50%; background: #fff; }

/* ---------- 页脚 ---------- */
.footer { background: var(--blue-900); color: rgba(255,255,255,.72); padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 56px; padding-bottom: 52px; }
.footer h4 { color: #fff; font-size: 16px; letter-spacing: .1em; margin-bottom: 24px; position: relative; padding-bottom: 14px; }
.footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--cyan-500); }
.footer .about p { font-size: 14px; line-height: 2.1; }
.footer ul li { margin-bottom: 12px; font-size: 14.5px; }
.footer ul li a { transition: color .2s, padding-left .2s; }
.footer ul li a:hover { color: var(--cyan-500); padding-left: 6px; }
.footer .contact li { display: flex; gap: 10px; line-height: 1.9; }
.footer .contact li i { color: var(--cyan-500); font-style: normal; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 24px 0; text-align: center; font-size: 13px;
  color: rgba(255,255,255,.5);
}
.footer-bottom a { color: rgba(255,255,255,.65); }

/* ---------- 回顶 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: #fff; font-size: 18px; box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s, transform .2s;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { transform: translateY(-4px); }

/* ---------- 滚动渐显 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .prod-grid { grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .subcat-grid { grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .overview-grid { grid-template-columns: repeat(2, 1fr); }
  .process-strip { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 920px) {
  .nav { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .header-tel { display: none; }
  .nav.open {
    display: flex; flex-direction: column; position: absolute; top: 76px; left: 0; right: 0;
    background: var(--blue-900); padding: 16px 24px 22px; gap: 4px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .nav.open a { padding: 12px 14px; font-size: 16px; height: auto; justify-content: flex-start; line-height: 1.4; }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .about-badge { left: 12px; }
  .contact-grid { grid-template-columns: 1fr; }
  .eq-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr 1fr; }
  .hero-arrow { display: none; }
  .subcat-card { grid-template-columns: 1fr; }
  .sc-media { min-height: 260px; }
  .sc-body { padding: 30px; }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .subcat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .prod-grid, .subcat-grid { grid-template-columns: 1fr; gap: 20px; }
  .overview-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .process-strip { grid-template-columns: repeat(3, 1fr); }
  .contact-items { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .band .items { gap: 28px; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero { height: 86vh; }
}

/* =========================================================
   多页面公共组件：内页横幅 / 面包屑 / CTA / 表单 / 新闻 / 案例 / 资质
   ========================================================= */

/* 内页顶部横幅 */
.page-hero {
  position: relative; padding: 168px 0 84px;
  background-size: cover; background-position: center;
  color: #fff;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(7,27,61,.92) 0%, rgba(10,42,94,.78) 50%, rgba(13,62,140,.55) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero .en {
  font-family: var(--font-en); font-size: 13px; letter-spacing: .4em;
  text-transform: uppercase; color: var(--cyan-500); margin-bottom: 14px; display: block;
}
.page-hero h1 { font-size: 42px; letter-spacing: .1em; font-weight: 800; margin-bottom: 18px; }
.page-hero p.sub { color: rgba(255,255,255,.8); max-width: 680px; font-size: 15.5px; line-height: 1.95; }
.crumb { margin-top: 26px; font-size: 13px; color: rgba(255,255,255,.65); letter-spacing: .06em; }
.crumb a { color: rgba(255,255,255,.65); }
.crumb a:hover { color: var(--cyan-500); }
.crumb span { color: var(--cyan-500); }

/* 首页：产品大类快速入口 */
.quick-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.quick-card {
  position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/4.7;
  display: flex; align-items: flex-end; color: #fff;
  box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s;
}
.quick-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.quick-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.quick-card:hover img { transform: scale(1.07); }
.quick-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,27,61,.05) 30%, rgba(7,27,61,.88) 100%); }
.quick-card .info { position: relative; z-index: 2; padding: 30px 26px; width: 100%; }
.quick-card .info .en { font-family: var(--font-en); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; opacity: .8; }
.quick-card .info h3 { font-size: 22px; letter-spacing: .08em; margin: 8px 0 12px; font-weight: 700; }
.quick-card .info .more {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13px;
  color: var(--cyan-500); letter-spacing: .1em;
}
.quick-card .info .more::after { content: "→"; transition: transform .2s; }
.quick-card:hover .info .more::after { transform: translateX(4px); }

/* 首页：服务流程步骤条 */
.steps-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.step-card { text-align: center; padding: 36px 16px 30px; position: relative; }
.step-card .no {
  width: 56px; height: 56px; margin: 0 auto 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-size: 19px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  box-shadow: 0 8px 20px rgba(30,111,217,.3);
}
.step-card h3 { font-size: 17px; letter-spacing: .08em; margin-bottom: 10px; }
.step-card p { font-size: 13.5px; color: var(--ink-400); line-height: 1.9; }
.step-card:not(:last-child)::after {
  content: ""; position: absolute; top: 56px; right: -12px; width: 24px; height: 2px;
  background: linear-gradient(90deg, var(--blue-400), transparent);
}

/* 首页：新闻与案例摘要 */
.news-grid, .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.news-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-card .thumb { aspect-ratio: 16/9; overflow: hidden; position: relative; }
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .thumb img { transform: scale(1.06); }
.news-card .thumb .tag {
  position: absolute; left: 14px; top: 14px; z-index: 2;
  background: linear-gradient(90deg, var(--blue-600), var(--blue-500)); color: #fff;
  font-size: 12px; padding: 5px 14px; border-radius: 30px; letter-spacing: .08em;
}
.news-card .body { padding: 26px 28px 30px; display: flex; flex-direction: column; flex: 1; }
.news-card .body .date { font-family: var(--font-en); font-size: 12px; color: var(--ink-400); letter-spacing: .06em; }
.news-card .body h3 { font-size: 18px; margin: 10px 0 12px; line-height: 1.65; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; display: -webkit-box; }
.news-card .body p { font-size: 14px; color: var(--ink-600); line-height: 1.95; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; display: -webkit-box; }
.news-card .body .link { margin-top: auto; padding-top: 18px; color: var(--blue-500); font-size: 14px; letter-spacing: .06em; display: inline-flex; align-items: center; gap: 6px; }
.news-card .body .link::after { content: "→"; }

/* 客户案例 */
.case-filter { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.case-filter button {
  padding: 9px 22px; border-radius: 50px; border: 1.5px solid var(--line);
  background: #fff; font-size: 14px; color: var(--ink-600); cursor: pointer; transition: all .2s;
}
.case-filter button.active { background: linear-gradient(90deg, var(--blue-600), var(--blue-500)); color: #fff; border-color: transparent; }
.case-card {
  position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/4.4;
  display: flex; align-items: flex-end; color: #fff;
  box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover img { transform: scale(1.06); }
.case-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,27,61,.1) 20%, rgba(7,27,61,.9) 100%); }
.case-card .info { position: relative; z-index: 2; padding: 28px 26px; width: 100%; }
.case-card .info .industry {
  display: inline-block; font-size: 12px; letter-spacing: .1em; padding: 5px 14px; border-radius: 30px;
  background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.3); backdrop-filter: blur(4px);
  margin-bottom: 14px;
}
.case-card .info h3 { font-size: 20px; letter-spacing: .06em; margin-bottom: 8px; }
.case-card .info p { font-size: 13.5px; opacity: .85; line-height: 1.85; }
.case-card .info .tags { margin-top: 12px; font-family: var(--font-en); font-size: 11px; letter-spacing: .12em; opacity: .6; }

/* 荣誉资质墙 */
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.honor-item {
  background: #fff; border: 1.5px dashed var(--line); border-radius: var(--radius);
  padding: 40px 26px; text-align: center; transition: border-color .2s, transform .2s, box-shadow .2s;
}
.honor-item:hover { border-color: var(--blue-400); transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.honor-item .icon {
  width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(30,111,217,.1), rgba(42,169,201,.16));
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; color: var(--blue-600);
}
.honor-item h3 { font-size: 17px; letter-spacing: .06em; margin-bottom: 10px; }
.honor-item p { font-size: 13px; color: var(--ink-400); line-height: 1.95; }

/* 询价 CTA 横幅 */
.cta-band {
  background: linear-gradient(100deg, var(--blue-800) 0%, var(--blue-600) 55%, var(--cyan-500) 120%);
  color: #fff; padding: 76px 0; position: relative; overflow: hidden; text-align: center;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,.12), transparent 45%);
}
.cta-band .container { position: relative; z-index: 2; }
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); letter-spacing: .1em; font-weight: 800; margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,.8); margin-bottom: 34px; font-size: 15.5px; }
.cta-band .btns { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }

/* 在线询价表单 */
.form-wrap { background: #fff; border-radius: var(--radius); padding: 48px 52px; box-shadow: var(--shadow-md); border: 1px solid var(--line); }
.form-wrap h3 { font-size: 24px; letter-spacing: .06em; margin-bottom: 8px; }
.form-wrap .tip { font-size: 13px; color: var(--ink-400); margin-bottom: 30px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 26px; }
.form-item { display: flex; flex-direction: column; gap: 8px; }
.form-item.full { grid-column: 1 / -1; }
.form-item label { font-size: 14px; color: var(--ink-600); letter-spacing: .06em; }
.form-item label i { color: #e05545; font-style: normal; }
.form-item input, .form-item select, .form-item textarea {
  border: 1.5px solid var(--line); border-radius: 10px; padding: 13px 16px;
  font-size: 15px; font-family: inherit; color: var(--ink-900);
  background: var(--bg-soft); transition: border-color .2s, background .2s, box-shadow .2s; width: 100%;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus {
  outline: none; border-color: var(--blue-500); background: #fff;
  box-shadow: 0 0 0 3px rgba(30,111,217,.12);
}
.form-item textarea { resize: vertical; min-height: 130px; line-height: 1.9; }
.form-actions { margin-top: 30px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.form-notes { font-size: 12.5px; color: var(--ink-400); line-height: 1.9; }

/* 表单提交成功提示 */
.form-alert {
  display: none; margin-top: 18px; padding: 14px 18px; border-radius: 10px;
  background: #e8f7ee; color: #1d7a45; border: 1px solid #bfe8cf; font-size: 14px;
}
.form-alert.show { display: block; }

/* 分页 */
.pager { display: flex; justify-content: center; gap: 8px; margin-top: 44px; }
.pager a, .pager span {
  min-width: 40px; height: 40px; padding: 0 10px; border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--line); font-size: 14px; color: var(--ink-600); background: #fff;
  transition: all .2s;
}
.pager a:hover { border-color: var(--blue-500); color: var(--blue-500); }
.pager .current { background: linear-gradient(90deg, var(--blue-600), var(--blue-500)); color: #fff; border-color: transparent; }

/* 联系页布局 */
.contact-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: 44px; align-items: start; }
.contact-layout .contact-items { grid-template-columns: 1fr 1fr; }
.contact-map { min-height: 340px; }

@media (max-width: 1080px) {
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(3, 1fr); row-gap: 30px; }
  .step-card:nth-child(3)::after { display: none; }
  .news-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .quick-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .news-grid, .case-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: 1fr; }
  .form-wrap { padding: 30px 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .page-hero { padding: 132px 0 56px; }
  .page-hero h1 { font-size: 30px; }
  .eq-grid { grid-template-columns: 1fr; }
  .prod-card .body { padding: 22px 22px 26px; }
}