/* ============================================================
   WIREMFG — 全站样式表 v2
   ------------------------------------------------------------
   设计方向：浅色工业（light industrial）
   - 页面以暖白 / 雾青 / 钢蓝三种底色为主，深色只用于页脚与少量色块
   - 三套配色系列通过 <html data-series="a|b|c"> 切换，所有颜色都走变量

   结构：
   1. 配色系列（改颜色只改这一节）
   2. 基础与排版
   3. 通用组件（按钮 / 卡片 / 表格 / 表单 / 标签）
   4. 顶部信息条 + 页头
   5. 首页：首屏 / 数据条 / 快速导航 / 四个产品入口
   6. 通用区块：能力 / 流程 / 画廊 / 分栏 / FAQ / 询盘
   7. 内页：产品列表 / 页首 / 工厂 / 联系
   8. 页脚 / 浮动按钮 / 配色切换器
   9. 响应式（电脑 / iPad / 手机）
   10. 动效
   ============================================================ */

/* ---------- 1. 配色系列 ---------- */
/* 系列 A：暖砂（默认）—— 米白底 + 工业橙 */
:root {
  --bg: #fbf8f3;
  --bg-2: #f2ece1;
  --surface: #ffffff;
  --ink: #241d16;
  --text: #3b342b;
  --muted: #7a7167;
  --line: rgba(36, 29, 22, .14);
  --line-2: rgba(36, 29, 22, .08);
  --accent: #d4551c;
  --accent-2: #b4440f;
  --accent-tint: rgba(212, 85, 28, .07);
  --accent-glow: rgba(212, 85, 28, .16);
  --deep: #2b2219;
  --deep-2: #221a13;
  --on-deep: #f8f2e8;
  --on-deep-muted: #c0b3a2;
  --mesh-1: rgba(36, 29, 22, .16);
  --mesh-2: rgba(36, 29, 22, .08);
  --shadow-1: 0 1px 2px rgba(52, 36, 20, .06);
  --shadow-2: 0 24px 48px -28px rgba(52, 36, 20, .35);
}

/* 系列 B：雾青 —— 淡绿底 + 森林绿 */
html[data-series="b"] {
  --bg: #f5f8f3;
  --bg-2: #e8efe5;
  --ink: #16241d;
  --text: #2c3d34;
  --muted: #6a7d72;
  --line: rgba(22, 36, 29, .15);
  --line-2: rgba(22, 36, 29, .08);
  --accent: #2c6b4d;
  --accent-2: #1f5238;
  --accent-tint: rgba(44, 107, 77, .08);
  --accent-glow: rgba(44, 107, 77, .17);
  --deep: #1b2b23;
  --deep-2: #14211a;
  --on-deep: #eff6f0;
  --on-deep-muted: #aabfb2;
  --mesh-1: rgba(22, 36, 29, .17);
  --mesh-2: rgba(22, 36, 29, .08);
  --shadow-2: 0 24px 48px -28px rgba(20, 40, 30, .35);
}

/* 系列 C：钢蓝 —— 冷白底 + 钢蓝 */
html[data-series="c"] {
  --bg: #f4f7fb;
  --bg-2: #e8eef6;
  --ink: #131c28;
  --text: #2a3644;
  --muted: #68768a;
  --line: rgba(19, 28, 40, .15);
  --line-2: rgba(19, 28, 40, .08);
  --accent: #2a5fb0;
  --accent-2: #1e4a8d;
  --accent-tint: rgba(42, 95, 176, .08);
  --accent-glow: rgba(42, 95, 176, .17);
  --deep: #16202c;
  --deep-2: #101822;
  --on-deep: #eef3fa;
  --on-deep-muted: #a6b6c8;
  --mesh-1: rgba(19, 28, 40, .17);
  --mesh-2: rgba(19, 28, 40, .08);
  --shadow-2: 0 24px 48px -28px rgba(18, 30, 48, .35);
}

/* 与配色无关的固定变量 */
:root {
  --font-display: "Barlow Condensed", "Arial Narrow", Impact, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;

  --max: 1320px;
  --gap: 24px;
  --pad-x: clamp(20px, 5vw, 64px);
  --radius: 3px;

  --topbar-h: 40px;
  --nav-h: 78px;
  --header-h: calc(var(--topbar-h) + var(--nav-h));
}

/* ---------- 2. 基础 ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .3s ease;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
::selection { background: var(--accent); color: #fff; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: .96;
  letter-spacing: -.015em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0;
}
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

/* ---------- 3. 通用组件 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section { padding: clamp(60px, 7.5vw, 116px) 0; position: relative; }
.section--tight { padding: clamp(44px, 4.6vw, 76px) 0; }
.section--paper2 { background: var(--bg-2); }

/* 深色区块（少量使用：画廊 / 页脚） */
.section--dark { background: var(--deep); color: var(--on-deep); }
.section--dark h2, .section--dark h3, .section--dark h4 { color: var(--on-deep); }
.section--dark .lead, .section--dark .muted { color: var(--on-deep-muted); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: currentColor;
  flex: none;
}

.h1 { font-size: clamp(40px, 5.6vw, 82px); }
.h2 { font-size: clamp(30px, 3.9vw, 54px); }
.h3 { font-size: clamp(21px, 2.1vw, 29px); letter-spacing: 0; }

.lead {
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.74;
  color: var(--muted);
  max-width: 62ch;
}
.section--dark .lead { color: var(--on-deep-muted); }
.muted { color: var(--muted); }

.section-head {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 40px;
  align-items: end;
  margin-bottom: clamp(30px, 3.6vw, 52px);
}
.section-head .lead { padding-bottom: 6px; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  transition: background .25s, color .25s, border-color .25s, transform .25s;
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-2); }
.btn--ghost { border-color: var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--light { background: #fff; color: var(--ink); box-shadow: var(--shadow-1); }
.btn--light:hover { background: var(--bg-2); }
.btn--sm { height: 42px; padding: 0 18px; font-size: 11.5px; }
.btn .arw { transition: transform .25s; }
.btn:hover .arw { transform: translateX(4px); }
.section--dark .btn--ghost { border-color: rgba(255, 255, 255, .3); color: #fff; }
.section--dark .btn--ghost:hover { border-color: var(--accent); color: #fff; background: rgba(255, 255, 255, .06); }

/* 卡片 */
.card {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: border-color .3s, transform .3s, box-shadow .3s;
}
.card:hover { border-color: var(--line); transform: translateY(-3px); box-shadow: var(--shadow-2); }

/* 内容小卡（新页面通用） */
.tile {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  transition: border-color .3s, transform .3s, box-shadow .3s;
}
.tile:hover { border-color: var(--line); transform: translateY(-3px); box-shadow: var(--shadow-2); }
.tile--plain { padding: 26px 26px 30px; }
.tile__media { aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-2); }
.tile__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.2, .7, .2, 1); }
.tile:hover .tile__media img { transform: scale(1.04); }

/* 产品实拍卡（INDUSTRIES 页）：统一 1:1 方图，contain 完整显示，不裁切不放大 */
.tile--product .tile__media {
  aspect-ratio: 1 / 1;
  background: #fff;
  border-radius: var(--radius) var(--radius) 0 0;
  border-bottom: 1px solid var(--line-2);
}
.tile--product .tile__media img { object-fit: contain; }
.tile--product:hover .tile__media img { transform: none; }
.tile__body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.tile__no {
  display: block;
  font-family: var(--font-display);
  font-size: 12px; font-weight: 700; letter-spacing: .2em;
  color: var(--accent); margin-bottom: 14px;
}
.tile h3 { font-size: 18px; text-transform: none; letter-spacing: 0; line-height: 1.3; }
.tile p { margin-top: 10px; font-size: 13.5px; line-height: 1.7; color: var(--muted); }
.tile__link {
  margin-top: auto; padding-top: 18px;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chips span {
  font-size: 11.5px; letter-spacing: .04em; color: var(--text);
  background: var(--bg-2); border: 1px solid var(--line-2);
  padding: 5px 10px;
}

/* 时间线 */
.timeline { border-top: 1px solid var(--line-2); }
.timeline li {
  display: grid; grid-template-columns: 96px 1fr; gap: 24px;
  padding: 20px 0; border-bottom: 1px solid var(--line-2);
}
.timeline b {
  font-family: var(--font-display); font-size: 26px; line-height: 1;
  color: var(--accent); letter-spacing: -.02em;
}
.timeline p { font-size: 14px; color: var(--muted); line-height: 1.7; }
.timeline p strong { color: var(--ink); font-weight: 600; }

/* 下载 / 资源列表 */
/* 联系渠道圆形图标（沿用旧 res-list 图标样式） */
.res-list__ico {
  width: 36px; height: 36px; flex: none; display: grid; place-items: center;
  background: var(--accent-tint); color: var(--accent); border-radius: var(--radius);
}

/* 资料下载（单文件卡片） */
.dl-card {
  display: flex; flex-direction: column;
  padding: clamp(16px, 1.8vw, 24px);
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 14px;
  box-shadow: 0 26px 50px -38px rgba(36, 29, 22, .6);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.dl-card:hover {
  transform: translateY(-3px);
  border-color: var(--line);
  box-shadow: 0 34px 60px -36px rgba(36, 29, 22, .62);
}
.dl-card__main { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 32px); }
.dl-card__inside {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin-top: clamp(16px, 1.6vw, 22px);
  padding-top: clamp(14px, 1.6vw, 18px);
  border-top: 1px solid var(--line-2);
}
.dl-card__inside-l {
  font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin-right: 4px;
}
.dl-tag {
  font-size: 11.5px; color: var(--text);
  background: var(--bg-2); border-radius: 100px; padding: 4px 11px;
}
.dl-card__thumb {
  flex: none; width: 158px; overflow: hidden; border-radius: 6px;
  background: var(--bg-2);
  box-shadow: 0 12px 26px -16px rgba(0, 0, 0, .5);
}
.dl-card__thumb img { display: block; width: 100%; height: auto; }
.dl-card__body { display: block; min-width: 0; padding-right: 12px; }
.dl-card__t { display: block; font-size: 17px; font-weight: 600; color: var(--ink); letter-spacing: -.01em; }
.dl-card__d { display: block; margin-top: 7px; font-size: 13.5px; line-height: 1.55; color: var(--muted); }
.dl-card__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
.dl-card__meta > span {
  font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); border: 1px solid var(--line-2);
  border-radius: 100px; padding: 3px 10px; white-space: nowrap;
}
.dl-card__cta {
  margin-left: auto; flex: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 48px; padding: 0 22px; border-radius: var(--radius);
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  white-space: nowrap;
  transition: background .25s ease;
}
.dl-card:hover .dl-card__cta { background: var(--accent-2); }
.dl-card__cta svg { transition: transform .25s ease; }
.dl-card:hover .dl-card__cta svg { transform: translateY(2px); }
.dl-note { margin-top: 18px; max-width: 62ch; font-size: 13px; line-height: 1.6; color: var(--muted); }
.dl-note a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 760px) {
  .dl-card__main { flex-wrap: wrap; gap: 16px; }
  .dl-card__body { flex: 1 1 150px; padding-right: 0; }
  .dl-card__thumb { width: 104px; }
  .dl-card__cta { margin-left: 0; width: 100%; }
}

/* 规格表 */
.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table th, .spec-table td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-2);
  vertical-align: top;
}
.spec-table th {
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--bg-2);
  white-space: nowrap;
}
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { color: var(--muted); white-space: nowrap; }
.spec-table td { color: var(--text); }
.section--dark .spec-table th, .section--dark .spec-table td { border-color: rgba(255, 255, 255, .12); color: var(--on-deep); }
.section--dark .spec-table th { background: rgba(255, 255, 255, .05); color: var(--on-deep-muted); }
.section--dark .spec-table td:first-child { color: var(--on-deep-muted); }
/* 窄屏：规格表在自己框里横向滚动，别把整页撑出横向滚动条 */
@media (max-width: 900px) {
  .spec-table { display: block; width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .spec-table::-webkit-scrollbar { height: 6px; }
  .spec-table::-webkit-scrollbar-thumb { background: var(--line); border-radius: 3px; }
  .spec-table::-webkit-scrollbar-track { background: transparent; }
}

/* 表单 */
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-size: 11px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted);
}
.field input, .field select, .field textarea {
  height: 50px;
  padding: 0 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 15px;
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
}
.field textarea { height: 108px; padding: 12px 14px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}
.field input::placeholder, .field textarea::placeholder { color: #a9a196; }
.field select option { color: #111; }
/* 深色底表单（保留兼容） */
.section--dark .field label { color: var(--on-deep-muted); }
.section--dark .field input, .section--dark .field select, .section--dark .field textarea {
  background: rgba(255, 255, 255, .05);
  border-color: rgba(255, 255, 255, .2);
  color: #fff;
}
.form--light .field input, .form--light .field select, .form--light .field textarea {
  background: #fff; border-color: var(--line); color: var(--text);
}

/* ---------- 4. 顶部信息条 + 页头 ---------- */
.site-head { position: fixed; inset: 0 0 auto 0; z-index: 100; }

.topbar {
  background: var(--deep);
  color: var(--on-deep-muted);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.topbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; height: var(--topbar-h);
}
.topbar__info { display: flex; align-items: center; gap: 24px; font-size: 11.5px; letter-spacing: .05em; }
.topbar__info > * { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.topbar__info span::before {
  content: ""; width: 5px; height: 5px; flex: none;
  background: var(--accent); display: block;
}
.topbar__info a { color: var(--on-deep); transition: color .2s; }
.topbar__info a:hover { color: #fff; }

.socials { display: flex; align-items: center; gap: 8px; }
.soc {
  width: 30px; height: 30px; flex: none;
  display: grid; place-items: center;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius);
  color: var(--on-deep-muted);
  transition: background .22s, border-color .22s, color .22s, transform .22s;
}
.soc svg { width: 14px; height: 14px; display: block; }
.soc:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-1px); }

.header {
  position: relative;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-2);
  transition: box-shadow .3s, background .3s;
}
.header.is-solid { box-shadow: 0 16px 36px -30px rgba(30, 20, 12, .55); background: rgba(255, 255, 255, .96); }
.header .container { display: flex; align-items: center; gap: 28px; width: 100%; }
.header__logo { flex: none; }
.header__logo img { height: 23px; width: auto; }
.header__nav { display: flex; align-items: center; gap: 26px; margin-left: auto; }
.header__nav a {
  font-size: 12px; font-weight: 600; letter-spacing: .09em;
  text-transform: uppercase; color: var(--text);
  padding: 6px 0; position: relative; transition: color .2s;
}
.header__nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--accent); transition: width .25s;
}
.header__nav a:hover, .header__nav a.is-active { color: var(--accent); }
.header__nav a:hover::after, .header__nav a.is-active::after { width: 100%; }
.header__cta { margin-left: 4px; }

/* ---------- 4.3 页头 PRODUCTS 下拉 ---------- */
.nav-item { position: relative; display: flex; align-items: center; }
.nav-item--has-sub > a { display: inline-flex; align-items: center; gap: 6px; }
.nav-item__caret { width: 9px; height: 6px; flex: none; transition: transform .25s; }
.nav-item--has-sub:hover .nav-item__caret,
.nav-item--has-sub:focus-within .nav-item__caret { transform: rotate(180deg); }

.nav-sub {
  position: absolute; top: calc(100% + 14px); left: -18px; z-index: 5;
  width: 232px; padding: 6px;
  background: var(--surface);
  border: 1px solid var(--line-2);
  box-shadow: 0 40px 70px -40px rgba(30, 20, 12, .55), 0 2px 10px -6px rgba(30, 20, 12, .18);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
}
/* 悬停桥：补上导航与面板之间的 14px 空隙，鼠标移动时不会闪断 */
.nav-sub::before { content: ""; position: absolute; left: 0; right: 0; top: -14px; height: 14px; }
.nav-item--has-sub:hover .nav-sub,
.nav-item--has-sub:focus-within .nav-sub { opacity: 1; visibility: visible; transform: none; }

.header__nav .nav-sub a {
  display: block; padding: 11px 12px;
  letter-spacing: 0; text-transform: none; font-size: 12.5px; font-weight: 600;
  color: var(--ink); transition: background .18s, color .18s;
}
.header__nav .nav-sub a::after { display: none; }
.header__nav .nav-sub a b {
  display: block; font-weight: 700; font-size: 12.5px;
  letter-spacing: .05em; text-transform: uppercase;
}
/* 分类说明小字：目前不使用（PRODUCT_CATS 第三项留空），保留规则以便随时加回 */
.header__nav .nav-sub a span {
  display: block; margin-top: 3px; font-weight: 400;
  font-size: 11.5px; letter-spacing: 0; text-transform: none; color: var(--muted);
}
.header__nav .nav-sub a:hover { background: var(--bg-2); color: var(--accent); }
.header__nav .nav-sub a:hover span { color: var(--text); }

/* 移动端菜单里的社交图标（桌面隐藏） */
.nav-soc { display: none; }

/* 汉堡 */
.nav-toggle {
  display: none; width: 44px; height: 44px; margin-left: auto;
  background: none; border: 0; padding: 0; position: relative;
}
.nav-toggle span {
  position: absolute; left: 11px; width: 22px; height: 1.5px;
  background: var(--ink); transition: transform .3s, opacity .3s;
}
.nav-toggle span:nth-child(1) { top: 17px; }
.nav-toggle span:nth-child(2) { top: 23px; }
.nav-toggle span:nth-child(3) { top: 29px; }
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 5.1 首页首屏 ---------- */
.hero {
  position: relative;
  background: var(--bg);
  padding-top: calc(var(--header-h) + clamp(40px, 5.4vw, 78px));
  padding-bottom: clamp(52px, 6vw, 92px);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--mesh-2) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mesh-2) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: linear-gradient(112deg, #000 0%, rgba(0, 0, 0, .35) 46%, transparent 72%);
  mask-image: linear-gradient(112deg, #000 0%, rgba(0, 0, 0, .35) 46%, transparent 72%);
  pointer-events: none;
}
.hero > .container { position: relative; z-index: 1; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: clamp(30px, 4.6vw, 68px);
  align-items: center;
}
.hero h1 { font-size: clamp(42px, 5.6vw, 80px); color: var(--ink); }
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  display: block;
}
.hero__sub {
  margin-top: 24px;
  font-size: clamp(15px, 1.06vw, 17px);
  line-height: 1.76;
  color: var(--muted);
  max-width: 48ch;
}
.hero__actions { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.hero__meta {
  display: flex; gap: 34px; margin-top: 42px;
  padding-top: 24px; border-top: 1px solid var(--line);
  flex-wrap: wrap;
}
.hero__meta div { min-width: 88px; }
.hero__meta b {
  display: block;
  font-family: var(--font-display);
  font-size: 30px; font-weight: 700; line-height: 1;
  letter-spacing: 0; color: var(--ink);
}
.hero__meta b span { font-size: .5em; color: var(--muted); }
.hero__meta > div > span {
  font-size: 10.5px; letter-spacing: .13em; text-transform: uppercase;
  color: var(--muted);
}

/* 首屏图片组：白色相框 + 轻阴影 */
.hero__media { position: relative; }
.hero__media-main {
  position: relative;
  background: var(--surface);
  padding: 9px;
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-2);
}
.hero__media-main img {
  width: 100%; height: clamp(300px, 38vw, 440px);
  object-fit: cover;
}
.hero__media-sub {
  position: absolute; right: -12px; bottom: -30px;
  width: 42%;
  background: var(--surface);
  padding: 7px;
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-2);
}
.hero__media-sub img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.hero__badge {
  position: absolute; left: 18px; top: 18px;
  background: var(--accent); color: #fff;
  font-family: var(--font-display);
  font-size: 12px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase;
  padding: 7px 13px;
}

/* ---------- 5.2 数据条 ---------- */
.statbar {
  background: var(--bg-2);
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}
.statbar__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.statbar__item {
  padding: 26px clamp(14px, 2vw, 26px);
  border-left: 1px solid var(--line-2);
}
.statbar__item:first-child { border-left: 0; padding-left: 0; }
.statbar b {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(28px, 2.9vw, 40px);
  line-height: 1; color: var(--ink);
  letter-spacing: -.01em;
}
.statbar b i { font-style: normal; color: var(--accent); }
.statbar span {
  display: block; margin-top: 8px;
  font-size: 10.5px; letter-spacing: .13em; text-transform: uppercase;
  color: var(--muted);
}
.section--dark .statbar__item { border-color: rgba(255, 255, 255, .12); }

/* ---------- 5.3 快速导航（首页五个入口） ---------- */
.nav-rail { background: var(--surface); border-bottom: 1px solid var(--line-2); }
.nav-rail__grid { display: grid; grid-template-columns: repeat(5, 1fr); }
.rail {
  position: relative;
  display: block;
  background: var(--surface);
  border-left: 1px solid var(--line-2);
  padding: 24px 22px 26px;
  transition: background .22s, color .22s;
}
.rail:first-child { border-left: 0; }
.rail:hover { background: var(--accent-tint); }
.rail__no {
  display: block;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700; letter-spacing: .2em;
  color: var(--accent); margin-bottom: 12px;
}
.rail__name {
  display: block;
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700; line-height: 1;
  text-transform: uppercase; color: var(--ink);
  padding-right: 22px;
}
.rail__desc { display: block; margin-top: 9px; font-size: 12px; color: var(--muted); line-height: 1.55; }
.rail__arw {
  position: absolute; right: 18px; top: 22px;
  color: var(--accent); opacity: 0; transform: translateX(-5px);
  transition: opacity .22s, transform .22s;
}
.rail:hover .rail__arw { opacity: 1; transform: none; }

/* ---------- 5.4 四个产品入口 ---------- */
.cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cat {
  position: relative;
  display: block;
  background: var(--surface);
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: border-color .3s, transform .3s, box-shadow .3s;
}
.cat:hover { border-color: var(--line); transform: translateY(-4px); box-shadow: var(--shadow-2); }
.cat__media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--bg-2);
}
.cat__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s cubic-bezier(.2, .7, .2, 1);
}
.cat:hover .cat__media img { transform: scale(1.05); }
.cat__index {
  position: absolute; left: 14px; top: 14px; z-index: 3;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700; letter-spacing: .14em;
  color: #fff; background: rgba(30, 22, 14, .62);
  padding: 5px 10px; backdrop-filter: blur(4px);
}
.cat__body { padding: 20px 20px 22px; }
.cat__name {
  font-family: var(--font-display);
  font-size: 21px; font-weight: 700; line-height: 1;
  text-transform: uppercase; letter-spacing: -.01em; color: var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.cat__name svg { flex: none; transition: transform .3s; color: var(--accent); }
.cat:hover .cat__name svg { transform: translateX(4px); }
.cat__spec {
  margin-top: 10px;
  font-size: 13px; line-height: 1.62; color: var(--muted);
  min-height: 42px;
}
.cat__tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px;
  padding-top: 14px; border-top: 1px solid var(--line-2);
}
.cat__tags span {
  font-size: 11px; letter-spacing: .04em;
  color: var(--text); background: var(--bg-2);
  padding: 4px 8px;
}
/* 第四个入口：定制类，用主色调淡底，不再用黑 */
.cat--custom { background: var(--accent-tint); border-color: var(--line-2); }
.cat--custom .cat__media { background: linear-gradient(158deg, var(--bg-2), var(--bg)); }
.cat--custom .cat__tags span { background: var(--surface); border: 1px solid var(--line-2); }
.cat--custom:hover { border-color: var(--accent); }
.cat--custom .pattern { opacity: 1; }
.cat--custom .pattern-glyph {
  font-size: clamp(46px, 5.2vw, 68px);
  -webkit-text-stroke: 1.5px var(--accent);
  opacity: .42;
}

/* 线网纹样铺底（无图产品位用） */
.pattern {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--mesh-1) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mesh-1) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: .8;
}
.pattern::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 18%, var(--accent-glow), transparent 62%);
}
.cat__media-note {
  position: absolute; left: 18px; right: 18px; bottom: 16px; z-index: 2;
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink);
}

/* ---------- 6.1 能力 / 优势 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line-2); }
.cap {
  background: var(--bg-2); padding: 32px 26px 36px;
  transition: background .3s;
}
.cap:hover { background: var(--surface); }
.cap__num {
  font-family: var(--font-display);
  font-size: 12px; font-weight: 700; letter-spacing: .18em;
  color: var(--accent); display: block; margin-bottom: 16px;
}
.cap h3 { font-size: 18px; letter-spacing: 0; text-transform: none; line-height: 1.28; }
.cap p { margin-top: 11px; font-size: 13.5px; line-height: 1.7; color: var(--muted); }
.cap b { color: var(--ink); font-weight: 600; }

/* ---------- 6.2 定制流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--line-2); }
.step { background: var(--surface); padding: 28px 20px 32px; position: relative; transition: background .3s; }
.step:hover { background: var(--accent-tint); }
.step__no {
  font-family: var(--font-display);
  font-size: 38px; font-weight: 700; line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
  margin-bottom: 14px; display: block;
}
.step h4 {
  font-size: 14px; text-transform: uppercase; letter-spacing: .06em;
  font-family: var(--font-body); font-weight: 600; color: var(--ink);
}
.step p { margin-top: 8px; font-size: 12.5px; line-height: 1.62; color: var(--muted); }
.step__time {
  margin-top: 14px; font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
}
.section--dark .step { background: var(--deep-2); }
.section--dark .step:hover { background: rgba(255, 255, 255, .05); }
.section--dark .step h4 { color: var(--on-deep); }
.section--dark .step p { color: var(--on-deep-muted); }
.section--dark .step__no { -webkit-text-stroke: 1px rgba(255, 255, 255, .34); }

/* ---------- 6.3 图片画廊 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: 10px;
}
.gallery figure {
  position: relative; margin: 0; overflow: hidden; background: var(--bg-2);
}
.gallery img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(.88);
  transition: filter .45s, transform .6s;
}
.gallery figure:hover img { filter: saturate(1.05); transform: scale(1.04); }
.gallery figcaption {
  position: absolute; left: 14px; bottom: 12px; z-index: 2;
  font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
  color: #fff; text-shadow: 0 1px 10px rgba(0, 0, 0, .75);
}
.gallery figure::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, .58), transparent 58%);
}
.gallery .span-2 { grid-column: span 2; }
.gallery .row-2 { grid-row: span 2; }

/* ---------- 6.4 分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 4.6vw, 68px); align-items: center; }
.split--media-left { direction: rtl; }
.split--media-left > * { direction: ltr; }
.split__media { position: relative; }
.split__media img { width: 100%; object-fit: cover; border: 1px solid var(--line-2); }
.split__media--tall img { aspect-ratio: 4 / 3; }

.checklist { display: grid; gap: 13px; margin-top: 24px; }
.checklist li {
  display: flex; gap: 12px; align-items: flex-start;
  font-size: 13.8px; line-height: 1.66; color: var(--muted);
}
.checklist li svg { flex: none; margin-top: 4px; color: var(--accent); }
.checklist li b { color: var(--ink); font-weight: 600; }
.section--dark .checklist li { color: var(--on-deep-muted); }
.section--dark .checklist li b { color: #fff; }

/* ---------- 6.5 FAQ ---------- */
.faq { border-top: 1px solid var(--line-2); }
.faq__item { border-bottom: 1px solid var(--line-2); }
.faq__q {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 24px;
  padding: 20px 0; background: none; border: 0; text-align: left;
  font-size: 15.5px; font-weight: 500; color: var(--ink);
}
.faq__q i { flex: none; width: 22px; height: 22px; position: relative; color: var(--accent); }
.faq__q i::before, .faq__q i::after {
  content: ""; position: absolute; background: currentColor;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
}
.faq__q i::before { width: 13px; height: 1.5px; }
.faq__q i::after { width: 1.5px; height: 13px; transition: transform .3s; }
.faq__item.is-open .faq__q i::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq__a p { padding: 0 40px 22px 0; font-size: 13.8px; line-height: 1.76; color: var(--muted); }
.section--dark .faq, .section--dark .faq__item { border-color: rgba(255, 255, 255, .14); }
.section--dark .faq__q { color: #fff; }
.section--dark .faq__a p { color: var(--on-deep-muted); }

/* ---------- 6.6 询盘区（浅色，不再用黑底） ---------- */
.cta {
  background: var(--bg-2);
  color: var(--text);
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line-2);
}
.cta::before {
  content: "";
  position: absolute; right: -8%; top: -30%;
  width: 58%; height: 160%;
  background: radial-gradient(circle, var(--accent-glow), transparent 66%);
  pointer-events: none;
}
.cta__grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(32px, 4.6vw, 72px); align-items: start; position: relative; }
.cta__points { display: grid; gap: 0; margin-top: 30px; border-top: 1px solid var(--line); }
.cta__points li {
  display: flex; justify-content: space-between; gap: 20px;
  padding: 15px 0; border-bottom: 1px solid var(--line);
  font-size: 13.5px; color: var(--muted);
}
.cta__points b { color: var(--ink); font-weight: 600; text-align: right; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .span-2 { grid-column: span 2; }
.form-note { margin-top: 12px; font-size: 11.5px; color: var(--muted); line-height: 1.6; }
.form-ok {
  display: none; margin-top: 14px; padding: 13px 15px;
  border: 1px solid var(--accent); background: var(--accent-tint);
  color: var(--ink); font-size: 13.5px;
}
.form-ok.is-visible { display: block; }
.form-ok strong { display: block; font-size: 14px; font-weight: 600; color: var(--ink); line-height: 1.45; }
.form-ok p { margin: 6px 0 0; font-size: 12.5px; line-height: 1.6; color: var(--text); }
.form-ok__warn { color: var(--accent-2) !important; font-weight: 500; }
.form-ok__acts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px; }
.form-ok__acts > a,
.form-ok__acts > button {
  display: inline-flex; align-items: center; justify-content: center;
  height: 36px; padding: 0 15px; border-radius: 6px;
  font-family: inherit; font-size: 11px; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  border: 1px solid var(--accent);
  background: transparent; color: var(--accent-2);
  transition: background .2s ease, color .2s ease;
}
.form-ok__acts > a:first-child { background: var(--accent); color: #fff; }
.form-ok__acts > a:first-child:hover { background: var(--accent-2); border-color: var(--accent-2); }
.form-ok__acts > a:not(:first-child):hover,
.form-ok__acts > button:hover { background: var(--accent); color: #fff; }
.form-ok__alt { font-size: 11.5px !important; color: var(--muted) !important; }
@media (max-width: 620px) {
  .form-ok__acts > a,
  .form-ok__acts > button { flex: 1 1 100%; }
}

/* 侧栏小列表（FAQ / 内页通用） */
.mini-list { margin-top: 30px; border-top: 1px solid var(--line); max-width: 420px; }
.mini-list li {
  display: flex; justify-content: space-between; gap: 18px;
  padding: 12px 0; border-bottom: 1px solid var(--line);
  font-size: 13px; color: var(--muted);
}
.mini-list b { color: var(--ink); font-weight: 600; text-align: right; }

/* ---------- 7.1 产品列表页 ---------- */
.cat-block {
  display: grid; grid-template-columns: 330px 1fr; gap: clamp(24px, 3.6vw, 52px);
  padding: clamp(38px, 4.6vw, 66px) 0;
  border-top: 1px solid var(--line-2);
}
.cat-block:first-of-type { border-top: 0; }
.cat-block__aside { position: sticky; top: calc(var(--header-h) + 22px); align-self: start; }
.cat-block__aside .h3 { margin-bottom: 12px; }
.cat-block__aside p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.cat-block__aside .btn { margin-top: 20px; }
.items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.item {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line-2);
  overflow: hidden; transition: border-color .3s, transform .3s, box-shadow .3s;
}
.item:hover { border-color: var(--line); transform: translateY(-3px); box-shadow: var(--shadow-1); }
.item__media { aspect-ratio: 4 / 3; background: var(--bg-2); position: relative; overflow: hidden; }
.item__media img { width: 100%; height: 100%; object-fit: cover; }
.item__body { padding: 15px 15px 17px; display: flex; flex-direction: column; flex: 1; }
.item__name { font-size: 14.5px; font-weight: 600; line-height: 1.35; color: var(--ink); }
.item__spec { margin-top: 6px; font-size: 12px; color: var(--muted); line-height: 1.55; flex: 1; }
.item__link {
  margin-top: 12px; font-size: 10.5px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
  display: inline-flex; align-items: center; gap: 6px;
}

/* 无图产品位：浅色技术线稿 */
.item__media--pattern { background: linear-gradient(158deg, var(--bg-2), var(--bg)); }
.item__media--pattern .pattern { opacity: .9; }
.item__media--pattern span {
  position: absolute; left: 14px; right: 14px; bottom: 12px; z-index: 2;
  padding-top: 9px; border-top: 1px solid var(--line);
  font-family: var(--font-display); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted);
}

/* ---------- 7.2 内页页首 ---------- */
.page-hero {
  background: var(--bg);
  padding-top: calc(var(--header-h) + clamp(34px, 4.2vw, 62px));
  padding-bottom: clamp(34px, 4.2vw, 62px);
  border-bottom: 1px solid var(--line-2);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--mesh-2) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mesh-2) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(100deg, #000, transparent 68%);
  mask-image: linear-gradient(100deg, #000, transparent 68%);
  pointer-events: none;
}
.page-hero > .container { position: relative; z-index: 1; }
.page-hero__grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(26px, 3.6vw, 60px); align-items: center; }
.page-hero h1 { font-size: clamp(34px, 4.2vw, 60px); }
.page-hero .lead { margin-top: 18px; color: var(--muted); }
.page-hero__media img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover;
  border: 9px solid var(--surface); box-shadow: var(--shadow-2);
}
.breadcrumb {
  font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 18px; display: flex; gap: 9px; flex-wrap: wrap;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--accent); }

/* 内页 Hero 无图时用纹样占位 */
.page-hero__media--pattern {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(158deg, var(--bg-2), var(--bg));
  border: 9px solid var(--surface);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}
.page-hero__media--pattern .pattern { opacity: .9; }
.page-hero__media--pattern .cat__media-note { left: 18px; right: 18px; bottom: 16px; color: var(--ink); }

/* 无图占位块中央的描边字 */
.pattern-glyph {
  position: absolute; inset: 0; z-index: 1;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(64px, 9vw, 128px); line-height: 1;
  letter-spacing: .04em;
  color: transparent; -webkit-text-stroke: 1.5px var(--mesh-1);
  pointer-events: none; user-select: none;
}

/* ---------- 7.3 工厂 / 联系 ---------- */
.equip-table td:first-child { color: var(--ink); font-weight: 500; }
/* 工厂工序图墙：4 列等格，每格 4:3，八道工序两行收齐（尺寸完全一致，不混用 span-2） */
.gallery--factory { grid-template-columns: repeat(4, 1fr); grid-auto-rows: auto; }
.gallery--factory figure { aspect-ratio: 4 / 3; }

.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(30px, 3.8vw, 60px); align-items: start; }
.info-list { border-top: 1px solid var(--line); margin-top: 24px; }
.info-list li {
  display: flex; justify-content: space-between; gap: 20px;
  padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 13.5px;
}
.info-list li span { color: var(--muted); }
.info-list li b { font-weight: 600; text-align: right; color: var(--ink); }
.info-list a { color: var(--accent); }

/* ---------- 8. 页脚 ---------- */
.footer {
  background: var(--deep);
  color: var(--on-deep);
  padding: clamp(46px, 4.6vw, 68px) 0 26px;
}
.footer__top {
  display: grid; grid-template-columns: 1.55fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.footer__logo img { height: 22px; width: auto; margin-bottom: 18px; }
.footer__about { font-size: 13px; line-height: 1.75; color: var(--on-deep-muted); max-width: 36ch; }
.footer h4 {
  font-family: var(--font-body); font-size: 10.5px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: #fff;
  margin-bottom: 15px;
}
.footer ul li { margin-bottom: 9px; }
.footer ul a, .footer ul li { font-size: 13px; color: var(--on-deep-muted); transition: color .2s; }
.footer ul a:hover { color: #fff; }

/* 页脚社交（带文字标签，2×2 排列，避免在窄栏里挤成 3+1） */
.socials--footer {
  margin-top: 22px; display: grid; gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 300px;
}
.socials--footer .soc {
  width: auto; height: 34px; padding: 0 10px; gap: 8px;
  display: inline-flex; align-items: center; justify-content: flex-start;
  font-size: 10.5px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  border-color: rgba(255, 255, 255, .16);
}
.socials--footer .soc svg { width: 14px; height: 14px; }
.socials--footer .soc span { line-height: 1; }

.footer__bottom {
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  padding-top: 22px; font-size: 11px; letter-spacing: .04em; color: rgba(255, 255, 255, .42);
}
.footer__bottom a { color: rgba(255, 255, 255, .6); }
.footer__bottom a:hover { color: #fff; }

/* 浮动联系按钮 */
.float-contact {
  position: fixed; right: 18px; bottom: 20px; z-index: 90;
  display: flex; flex-direction: column; gap: 9px;
}
.float-contact a {
  width: 46px; height: 46px; display: grid; place-items: center;
  background: var(--surface); color: var(--accent);
  border: 1px solid var(--line); border-radius: 50%;
  box-shadow: var(--shadow-1);
  transition: background .25s, border-color .25s, color .25s, transform .25s;
}
.float-contact a:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-2px); }
.float-contact .is-wa { background: var(--accent); border-color: var(--accent); color: #fff; }
.float-contact .is-wa:hover { background: var(--accent-2); border-color: var(--accent-2); }

/* 配色切换器（仅首页显示，交付后可整段删除） */
.series-dock {
  position: fixed; left: 18px; bottom: 20px; z-index: 95;
  display: flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 10px 6px 14px;
  box-shadow: var(--shadow-2);
  font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted);
}
.series-dock__label { margin-right: 2px; }
.series-dock button {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line-2); background: var(--bg);
  border-radius: 999px; padding: 4px 10px 4px 5px;
  font-size: 10.5px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--text);
  transition: border-color .2s, background .2s, color .2s;
}
.series-dock button i {
  width: 14px; height: 14px; border-radius: 50%; display: block;
}
.series-dock button:hover { border-color: var(--line); }
.series-dock button.is-on { border-color: var(--accent); color: var(--accent); background: var(--accent-tint); }

/* ---------- 9. 响应式 ---------- */

/* 小笔记本 / iPad 横屏 */
@media (max-width: 1180px) {
  .header__nav { gap: 20px; }
  .header .container { gap: 20px; }
  .cats { grid-template-columns: repeat(2, 1fr); }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .cat-block { grid-template-columns: 1fr; }
  .cat-block__aside { position: static; }
  .items { grid-template-columns: repeat(2, 1fr); }
  .nav-rail__grid { grid-template-columns: repeat(2, 1fr); }
  .rail:nth-child(odd) { border-left: 0; }
  .rail:nth-child(n+3) { border-top: 1px solid var(--line-2); }
  .rail:last-child { grid-column: 1 / -1; }
  .footer__top { grid-template-columns: 1fr 1fr; }
}

/* iPad 竖屏 / 平板：导航收起 */
@media (max-width: 1024px) {
  :root { --nav-h: 68px; --topbar-h: 38px; }
  .header__nav, .header__cta { display: none; }
  .nav-toggle { display: block; }
  /* 注意：.header 有 backdrop-filter，会让 position:fixed 相对它定位，
     所以这里用 absolute 挂在 .header 下方，而不是 fixed */
  .header__nav {
    position: absolute; top: 100%; left: 0; right: 0;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    margin: 0; padding: 10px var(--pad-x) 26px;
    background: var(--surface); border-bottom: 1px solid var(--line);
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
    box-shadow: 0 24px 40px -30px rgba(0, 0, 0, .5);
  }
  body.nav-open .header__nav { display: flex; }
  body.nav-open .header__nav a {
    padding: 15px 0; border-bottom: 1px solid var(--line-2);
    font-size: 13px; letter-spacing: .1em;
  }
  body.nav-open .header__nav a::after { display: none; }
  .nav-soc { display: flex; gap: 8px; padding-top: 20px; }
  .nav-soc .soc { border-color: var(--line); color: var(--text); width: 38px; height: 38px; }
  .nav-soc .soc:hover { color: #fff; }
  /* 收起状态下的 PRODUCTS：分类直接内嵌展开，不做二次点击 */
  .nav-item { display: block; }
  .nav-item--has-sub > a { display: flex; align-items: center; justify-content: space-between; }
  .nav-item__caret { display: none; }
  .nav-sub {
    position: static; width: auto; padding: 0; margin: 0 0 4px;
    border: 0; box-shadow: none; background: var(--bg-2);
    opacity: 1; visibility: visible; transform: none; transition: none;
  }
  .nav-sub::before { display: none; }
  body.nav-open .header__nav .nav-sub a {
    padding: 11px 14px; border-bottom: 1px solid var(--line-2);
    font-size: 12px; letter-spacing: .04em;
  }
  body.nav-open .header__nav .nav-sub a span { font-size: 11px; }
  body.nav-open .header__nav .nav-sub a:last-child { border-bottom: 0; }
  .topbar__info span { display: none; }
}

/* 平板 / 窄屏 */
@media (max-width: 900px) {
  .hero__grid, .page-hero__grid, .split, .cta__grid, .contact-grid, .section-head { grid-template-columns: 1fr; }
  .split--media-left { direction: ltr; }
  .hero__media { margin-top: 26px; }
  .hero__media-sub { width: 34%; right: 0; bottom: -18px; }
  .statbar__grid { grid-template-columns: repeat(2, 1fr); }
  .statbar__item { border-top: 1px solid var(--line-2); padding: 20px 18px; }
  .statbar__item:nth-child(odd) { border-left: 0; padding-left: 0; }
  .statbar__item:nth-child(1), .statbar__item:nth-child(2) { border-top: 0; }
  .gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 170px; }
  /* 两列时八张图正好四行，最后一张不再跨列 */
  .gallery--factory { grid-template-columns: repeat(2, 1fr); grid-auto-rows: auto; }
  .gallery--factory figure:last-child { grid-column: auto; aspect-ratio: 4 / 3; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: span 1; }
  .items { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 26px; }
  .float-contact { display: none; }
  .series-dock { left: 12px; bottom: 12px; padding: 5px 8px 5px 10px; }
  .series-dock__label { display: none; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 76px 1fr; gap: 16px; }
}

/* 手机 */
@media (max-width: 560px) {
  :root { --nav-h: 62px; --topbar-h: 36px; --pad-x: 18px; }
  .topbar__inner { justify-content: center; }
  .topbar__info { display: none; }
  .cats { grid-template-columns: 1fr; }
  .statbar__grid { grid-template-columns: 1fr; }
  .statbar__item { border-left: 0 !important; padding-left: 0 !important; }
  .statbar__item:nth-child(2) { border-top: 1px solid var(--line-2); }
  .gallery { grid-template-columns: 1fr; grid-auto-rows: 190px; }
  .gallery .span-2 { grid-column: span 1; }
  .gallery--factory { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .gallery--factory figure:last-child { grid-column: auto; aspect-ratio: 4 / 3; }
  .nav-rail__grid { grid-template-columns: 1fr; }
  .rail { border-left: 0; }
  .rail:nth-child(n+2) { border-top: 1px solid var(--line-2); }
  .rail:last-child { grid-column: auto; }
  .hero h1 { font-size: clamp(36px, 9vw, 46px); }
  .hero__actions .btn { flex: 1 1 100%; }
  .hero__media-main img { height: 260px; }
  .hero__media-sub { width: 40%; bottom: -14px; }
  .series-dock { display: none; }
  .footer__bottom { font-size: 10px; }
}

/* ---------- 10. 动效 ---------- */
/* 默认可见；只有 JS 可用时才做进场动画，避免脚本失效导致内容不显示 */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 11. 线网纹样变体（无图产品位用，模拟不同网型） ---------- */
.pattern--chain {
  background-image:
    repeating-linear-gradient(45deg, var(--mesh-1) 0 1px, transparent 1px 14px),
    repeating-linear-gradient(-45deg, var(--mesh-1) 0 1px, transparent 1px 14px);
  background-size: auto;
}
.pattern--tight {
  background-image:
    linear-gradient(to right, var(--mesh-1) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mesh-1) 1px, transparent 1px);
  background-size: 11px 11px;
}
.pattern--wide {
  background-image:
    linear-gradient(to right, var(--mesh-1) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mesh-1) 1px, transparent 1px);
  background-size: 46px 32px;
}
.pattern--hex {
  background-image:
    radial-gradient(circle at 50% 50%, transparent 9px, var(--mesh-1) 9px 10px, transparent 10px);
  background-size: 20px 17px;
}
.pattern--358 {
  background-image:
    linear-gradient(to right, var(--mesh-1) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mesh-2) 1px, transparent 1px);
  background-size: 5px 26px;
}