/* ==========================================================================
   广西柳州盛龙科技有限公司 · 官网样式表
   --------------------------------------------------------------------------
   ★ 颜色不在这里定义！全部在 theme.css 里。
     要换配色请改 assets/css/theme.css，本文件只写 var(--变量名)。
     配色：沉稳深蓝 + 朱红（传统重工 / 国企感）
   ========================================================================== */

/* 本文件只保留「尺寸」变量；颜色、阴影、渐变全部见 theme.css */
:root {
  --maxw: 1200px;
  --hd: 74px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  color: var(--c-text);
  background: var(--c-white);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .22s, background-color .22s, opacity .22s; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

:focus-visible { outline: 3px solid var(--brand-accent); outline-offset: 2px; }

/* ---------- 通用容器 / 排版 ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 1440px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.kicker {
  display: block; font-size: 12px; font-weight: 800; letter-spacing: .28em;
  color: var(--brand-secondary); text-transform: uppercase; margin-bottom: 12px;
}
.sec-title { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; color: var(--brand-primary); letter-spacing: .06em; line-height: 1.25; }
.sec-rule { width: 66px; height: 5px; background: var(--brand-accent); margin: 18px 0 22px; }
.sec-rule.center { margin-left: auto; margin-right: auto; }
.lead { font-size: 16px; color: var(--c-text-2); line-height: 2; }
.center { text-align: center; }
.on-dark .kicker { color: var(--brand-accent-on-dark); }
.on-dark .sec-title { color: var(--c-white); }
.on-dark .lead { color: rgba(255, 255, 255, .8); }

section { position: relative; }
.pad { padding: 88px 0; }
.pad-sm { padding: 64px 0; }
.bg-silver { background: var(--c-bg-soft); }
.bg-deep { background: var(--brand-primary); color: var(--c-white); }
.bg-deep-2 { background: var(--brand-primary-d1); color: var(--c-white); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 14px 32px; font-size: 15px; font-weight: 700; letter-spacing: .08em;
  border: 2px solid transparent; transition: all .25s; white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn-primary { background: var(--brand-accent); color: var(--c-white); }
.btn-primary:hover { background: var(--brand-accent-d); transform: translateY(-2px); box-shadow: var(--shadow-accent); }
.btn-ghost { border-color: rgba(255, 255, 255, .55); color: var(--c-white); }
.btn-ghost:hover { background: var(--c-white); color: var(--brand-primary); border-color: var(--c-white); }
.btn-outline { border-color: var(--brand-primary); color: var(--brand-primary); }
.btn-outline:hover { background: var(--brand-primary); color: var(--c-white); }
.btn-sm { padding: 10px 20px; font-size: 13.5px; }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--nav-line);
  transition: box-shadow .3s, background-color .3s;
}
.site-header.scrolled { box-shadow: var(--shadow-m); }
.header-inner {
  height: var(--hd); display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 14px; flex: none; }
.brand img { height: 44px; width: auto; }
.brand-txt { border-left: 1px solid var(--nav-line); padding-left: 14px; }
.brand-txt .bn { font-size: 13.5px; font-weight: 700; color: var(--nav-fg-h); letter-spacing: .05em; line-height: 1.3; }
.brand-txt .bs { font-size: 9.5px; color: rgba(255, 255, 255, .55); letter-spacing: .13em; margin-top: 3px; }
@media (max-width: 1240px) { .brand-txt { display: none; } }

.main-nav { display: flex; align-items: center; gap: 4px; flex: 1 1 auto; justify-content: flex-end; min-width: 0; }
.main-nav > li { position: relative; flex: none; }
.main-nav > li > a {
  display: block; padding: 10px 16px; font-size: 15px; font-weight: 600;
  color: var(--nav-fg); letter-spacing: .05em; border-radius: 2px; white-space: nowrap;
}
.main-nav > li > a:hover { color: var(--nav-fg-h); background: var(--nav-hover-bg); }
.main-nav > li.active > a { color: var(--nav-fg-h); }
.main-nav > li.active > a::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 0; height: 3px; background: var(--brand-accent-on-dark);
}
/* 下拉菜单小三角。
   ⚠️ 选择器必须写成 ul.main-nav > li.has-sub > a（优先级 0,2,3）。
   历史 bug（2026-10-04 修）：原写作 .has-sub > a（0,1,1），优先级低于
   .main-nav > li > a（0,1,2）的 padding 简写，导致 padding-right 从未生效、
   三角压住文字。提高优先级后，padding-right 才能稳定留出三角位。 */
ul.main-nav > li.has-sub > a { position: relative; padding-right: 26px; }
ul.main-nav > li.has-sub > a::before {
  content: ""; position: absolute; right: 11px; top: 50%; margin-top: -2px;
  border: 4px solid transparent; border-top-color: currentColor;
  pointer-events: none;
}

.sub-nav {
  position: absolute; top: 100%; left: 0; min-width: 210px; padding: 8px 0;
  background: var(--c-white); border: 1px solid var(--c-line); border-top: 3px solid var(--brand-accent);
  box-shadow: var(--shadow-m); opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all .24s;
}
.has-sub:hover .sub-nav, .has-sub:focus-within .sub-nav { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-nav a { display: block; padding: 11px 20px; font-size: 14px; color: var(--c-text); }
.sub-nav a:hover { background: var(--c-bg-soft); color: var(--brand-primary); padding-left: 26px; }

.header-cta { display: flex; align-items: center; gap: 14px; flex: none; }
.tel-box { text-align: right; line-height: 1.3; }
.tel-box .tk { font-size: 11px; color: rgba(255, 255, 255, .55); letter-spacing: .1em; }
.tel-box .tv { font-size: 17px; font-weight: 800; color: var(--nav-fg-h); letter-spacing: .02em; }
/* 语言切换（中 / EN）：页头右侧小胶囊按钮。导航为深色底，故用白色半透明描边 */
.lang-switch {
  display: inline-flex; align-items: center; gap: 6px; flex: none;
  height: 34px; padding: 0 12px; border: 1px solid rgba(255, 255, 255, .30);
  border-radius: 999px; color: rgba(255, 255, 255, .92);
  font-size: 12.5px; font-weight: 700; letter-spacing: .08em; white-space: nowrap;
  transition: background .22s, border-color .22s, color .22s;
}
.lang-switch svg { width: 14px; height: 14px; flex: none; }
.lang-switch:hover { background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .58); color: #fff; }

.nav-toggle { display: none; width: 42px; height: 42px; position: relative; }
.nav-toggle span {
  position: absolute; left: 10px; right: 10px; height: 2px; background: var(--nav-fg-h); transition: .3s;
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle.open span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* ==========================================================================
   首页 Hero
   ========================================================================== */
.hero {
  position: relative; min-height: 640px; display: flex; align-items: center;
  background: var(--brand-primary-d1); color: var(--c-white); overflow: hidden; padding: calc(var(--hd) + 60px) 0 70px;
}
.hero-bg { position: absolute; inset: 0; background: url("../img/factory.webp") center/cover no-repeat; opacity: .3; }
.hero-veil {
  position: absolute; inset: 0;
  background: var(--veil-hero);
}
.hero-ring {
  position: absolute; right: -160px; bottom: -180px; width: 520px; height: 520px;
  border-radius: 50%; border: 1px solid rgba(var(--brand-accent-on-dark-rgb), .55);
}
.hero-ring::after { content: ""; position: absolute; inset: 32px; border-radius: 50%; border: 1px solid rgba(var(--brand-accent-on-dark-rgb), .35); }
.hero-inner { position: relative; z-index: 3; width: 100%; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 10px; padding: 7px 18px; margin-bottom: 26px;
  border: 1px solid rgba(var(--brand-accent-rgb), .6); background: rgba(var(--brand-accent-rgb), .14);
  font-size: 13px; letter-spacing: .2em; color: var(--brand-accent-on-dark); font-weight: 700;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 62px); font-weight: 800; letter-spacing: .08em;
  line-height: 1.42; text-shadow: 0 6px 30px rgba(0, 0, 0, .3);
}
.hero h1 b { color: var(--brand-accent-on-dark); }
.hero-sub {
  margin-top: 26px; font-size: clamp(15px, 1.7vw, 19px); letter-spacing: .12em;
  color: rgba(255, 255, 255, .9); border-left: 4px solid var(--brand-accent); padding-left: 18px; font-weight: 600;
}
.hero-desc { margin-top: 22px; max-width: 660px; font-size: 15.5px; line-height: 2; color: rgba(255, 255, 255, .78); }
.hero-actions { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 16px; }
.hero-cats {
  position: relative; z-index: 3; margin-top: 54px; display: flex; flex-wrap: wrap; gap: 14px;
}
.hero-cats span {
  padding: 9px 22px; border: 1px solid rgba(255, 255, 255, .28); font-size: 13.5px;
  letter-spacing: .22em; color: rgba(255, 255, 255, .9); background: rgba(255, 255, 255, .05);
}

/* ---------- 数据条 ---------- */
.stat-band { background: var(--brand-primary); color: var(--c-white); }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 34px 26px; border-right: 1px solid rgba(255, 255, 255, .13); text-align: center;
  min-width: 0; overflow-wrap: break-word;
}
.stat:last-child { border-right: 0; }
.stat .sv { font-size: clamp(22px, 2.6vw, 32px); font-weight: 800; color: var(--brand-accent-on-dark); letter-spacing: .04em; line-height: 1.2; }
.stat .sk { font-size: 13.5px; color: rgba(255, 255, 255, .78); margin-top: 8px; letter-spacing: .1em; }

/* ---------- 产品卡 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 46px; }
.prod-card {
  position: relative; background: var(--c-white); border: 1px solid var(--c-line);
  overflow: hidden; transition: transform .3s, box-shadow .3s, border-color .3s;
  display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-m); border-color: rgba(var(--brand-primary-rgb), .3); }
.prod-card .pc-img { position: relative; height: 232px; overflow: hidden; background: var(--c-bg-soft); }
.prod-card .pc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.prod-card:hover .pc-img img { transform: scale(1.06); }
.prod-card .pc-flag {
  position: absolute; top: 0; left: 0; padding: 7px 15px; background: var(--brand-accent);
  color: var(--c-white); font-size: 12px; font-weight: 700; letter-spacing: .12em; z-index: 2;
}
.prod-card .pc-body { padding: 26px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.prod-card h3 { font-size: 21px; font-weight: 800; color: var(--brand-primary); letter-spacing: .04em; }
.prod-card .pc-en { font-size: 11px; color: var(--c-text-2); letter-spacing: .16em; text-transform: uppercase; margin-top: 5px; }
.prod-card .pc-rule { width: 40px; height: 3px; background: var(--brand-accent); margin: 15px 0 15px; }
.prod-card p { font-size: 14px; color: var(--c-text-2); line-height: 1.9; flex: 1; }
.prod-card .pc-link {
  margin-top: 20px; display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; font-weight: 700; color: var(--brand-primary); letter-spacing: .06em;
}
.prod-card .pc-link svg { width: 15px; height: 15px; transition: transform .25s; }
.prod-card:hover .pc-link { color: var(--brand-accent); }
.prod-card:hover .pc-link svg { transform: translateX(4px); }

/* ---------- 能力/职能 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.cap {
  background: var(--c-white); padding: 32px 28px; border-top: 4px solid var(--brand-accent);
  box-shadow: var(--shadow-s); transition: transform .3s, box-shadow .3s;
}
.cap:hover { transform: translateY(-5px); box-shadow: var(--shadow-m); }
.cap .cn { font-size: 13px; font-weight: 800; color: var(--brand-accent); letter-spacing: .18em; }
.cap h3 { font-size: 20px; font-weight: 800; color: var(--brand-primary); letter-spacing: .06em; margin: 10px 0 12px; }
.cap p { font-size: 14px; color: var(--c-text-2); line-height: 1.9; }
/* 三项职能卡：移除「壹/贰/叁」编号后，标题成为卡片首元素——收紧上间距，
   并加一条细分隔线，让标题与正文形成清晰层级（替代原编号的视觉锚点）。 */
.cap > h3:first-child { margin: 0 0 14px; padding-bottom: 13px; border-bottom: 1px solid var(--c-line); }
/* 中文职能名标签：原写作「壹 · 阻水引流」，去编号后收紧字距，避免四个汉字被拉散 */
.cap .cn.zh { letter-spacing: .08em; }

/* ---------- 图文两栏 ---------- */
.split { display: grid; grid-template-columns: 1.08fr 1fr; gap: 56px; align-items: center; }
.split.rev .split-txt { order: 2; }
.split-txt p { font-size: 15px; color: var(--c-text-2); line-height: 2.05; margin-bottom: 15px; text-align: justify; }
.split-txt p:last-child { margin-bottom: 0; }
.split-media { position: relative; }
.split-media img { width: 100%; box-shadow: var(--shadow-m); }
.split-media .badge-corner {
  position: absolute; left: -18px; bottom: 26px; background: var(--brand-accent); color: var(--c-white);
  padding: 12px 22px; font-size: 14px; font-weight: 700; letter-spacing: .1em; box-shadow: var(--shadow-m);
}

/* ---------- 董事长寄语 ---------- */
.quote-box { background: var(--brand-primary-d1); color: var(--c-white); padding: 60px 56px; position: relative; overflow: hidden; }
.quote-box::before {
  content: "\201C"; position: absolute; top: -30px; left: 26px; font-size: 180px;
  color: rgba(var(--brand-accent-rgb), .18); font-family: Georgia, serif; line-height: 1;
}
.quote-box .qt-mark { font-size: 12px; letter-spacing: .28em; color: var(--brand-accent-on-dark); font-weight: 800; margin-bottom: 20px; }
.quote-box p { font-size: 15.5px; line-height: 2.15; color: rgba(255, 255, 255, .88); margin-bottom: 16px; text-align: justify; }
.quote-box .qt-sign { margin-top: 26px; text-align: right; font-size: 19px; font-weight: 700; letter-spacing: .2em; color: var(--brand-accent); }
.quote-box .qt-sign small { display: block; font-size: 11.5px; color: rgba(255, 255, 255, .5); letter-spacing: .16em; margin-top: 6px; font-weight: 400; }

/* MVV */
.mvv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 30px; }
.mvv { background: var(--c-bg-soft); padding: 28px 26px; border-left: 4px solid var(--brand-primary); }
.mvv h3 { font-size: 17px; color: var(--brand-primary); letter-spacing: .16em; margin-bottom: 10px; font-weight: 800; }
.mvv p { font-size: 14.5px; color: var(--c-text); line-height: 1.85; }

/* ---------- 客户墙 ---------- */
.logo-wall {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin-top: 40px; align-items: center;
}
.logo-wall .lg {
  background: var(--c-white); border: 1px solid var(--c-line); height: 108px; display: flex;
  align-items: center; justify-content: center; padding: 14px; transition: transform .3s, box-shadow .3s;
}
.logo-wall .lg:hover { transform: translateY(-4px); box-shadow: var(--shadow-s); }
.logo-wall .lg img { max-width: 88%; max-height: 78px; object-fit: contain; }
.logo-note { margin-top: 20px; font-size: 12.5px; color: var(--c-text-2); letter-spacing: .06em; text-align: center; }

/* ---------- 资质 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
.cert {
  display: grid; grid-template-columns: 160px 1fr; gap: 22px; align-items: center;
  background: var(--c-white); border: 1px solid var(--c-line); padding: 20px; transition: box-shadow .3s;
}
.cert:hover { box-shadow: var(--shadow-m); }
.cert img { width: 100%; border: 1px solid var(--c-line); background: #fff; }
.cert h3 { font-size: 17.5px; font-weight: 800; color: var(--brand-primary); letter-spacing: .04em; margin-bottom: 9px; }
.cert p { font-size: 13.5px; color: var(--c-text-2); line-height: 1.85; }
.cert p .kv { color: var(--brand-primary); font-weight: 700; }

/* ---------- CTA 条 ---------- */
.cta-band { background: var(--brand-accent); color: var(--c-white); padding: 46px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-inner h3 { font-size: clamp(21px, 2.5vw, 29px); font-weight: 800; letter-spacing: .06em; }
.cta-inner p { font-size: 14.5px; color: rgba(255, 255, 255, .92); margin-top: 8px; letter-spacing: .05em; }
.cta-band .btn-ghost { border-color: rgba(255, 255, 255, .8); }
.cta-band .btn-ghost:hover { background: var(--c-white); color: var(--brand-accent); border-color: var(--c-white); }

/* ==========================================================================
   内页
   ========================================================================== */
.page-hero {
  position: relative; padding: calc(var(--hd) + 66px) 0 62px; background: var(--brand-primary-d1);
  color: var(--c-white); overflow: hidden;
}
.page-hero .ph-bg { position: absolute; inset: 0; background: url("../img/factory.webp") center/cover no-repeat; opacity: .2; }
.page-hero .ph-veil { position: absolute; inset: 0; background: var(--veil-page); }
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; letter-spacing: .1em; }
.page-hero .ph-sub { margin-top: 14px; font-size: 15px; color: rgba(255, 255, 255, .78); letter-spacing: .12em; }

.breadcrumb { padding: 16px 0; border-bottom: 1px solid var(--c-line); background: var(--c-white); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 9px; font-size: 13px; color: var(--c-text-2); }
.breadcrumb li { display: flex; align-items: center; gap: 9px; }
.breadcrumb li + li::before { content: "/"; color: var(--c-line); }
.breadcrumb a:hover { color: var(--brand-accent); }
.breadcrumb [aria-current] { color: var(--brand-primary); font-weight: 700; }

/* 产品详情 */
.detail-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 52px; align-items: start; }
.detail-grid .dg-media img { width: 100%; box-shadow: var(--shadow-m); }
.detail-grid .dg-media .dg-multi { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.detail-grid .dg-media .dg-multi img { box-shadow: var(--shadow-s); }

.spec-list { margin-top: 10px; }
.spec-list li {
  position: relative; padding: 11px 0 11px 26px; border-bottom: 1px dashed var(--c-line);
  font-size: 14.5px; color: var(--c-text); line-height: 1.8;
}
.spec-list li::before {
  content: ""; position: absolute; left: 4px; top: 20px; width: 7px; height: 7px; background: var(--brand-accent);
}
.spec-list li b { color: var(--brand-primary); }

.chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
.chips span {
  padding: 8px 16px; background: var(--c-bg-soft); border: 1px solid var(--c-line);
  font-size: 13px; color: var(--brand-primary); letter-spacing: .06em;
}

.tag-strip { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.tag-strip span {
  padding: 10px 26px; background: var(--brand-primary); color: var(--c-white); font-size: 14px;
  font-weight: 700; letter-spacing: .2em;
}

/* 表格 */
.tbl-wrap { overflow-x: auto; margin-top: 28px; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
table.data th, table.data td { padding: 13px 16px; border: 1px solid var(--c-line); text-align: left; vertical-align: top; }
table.data th { background: var(--brand-primary); color: var(--c-white); font-weight: 700; letter-spacing: .06em; white-space: nowrap; }
table.data tbody tr:nth-child(even) { background: var(--c-bg-soft); }
table.data td b { color: var(--brand-primary); }

/* 流程 */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 40px; }
.flow .step { background: var(--c-bg-soft); padding: 24px 18px; border-top: 3px solid var(--brand-primary); position: relative; }
.flow .step .si { font-size: 12px; font-weight: 800; color: var(--brand-accent); letter-spacing: .18em; }
.flow .step h4 { font-size: 16px; font-weight: 800; color: var(--brand-primary); margin: 8px 0 8px; letter-spacing: .05em; }
.flow .step p { font-size: 13px; color: var(--c-text-2); line-height: 1.75; }

/* 联系 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-list .ci {
  display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--c-line); align-items: flex-start;
}
.contact-list .ci .ic {
  width: 46px; height: 46px; flex: none; background: var(--brand-primary); color: var(--c-white);
  display: flex; align-items: center; justify-content: center;
}
.contact-list .ci .ic svg { width: 21px; height: 21px; }
.contact-list .ci .k { font-size: 12px; color: var(--c-text-2); letter-spacing: .16em; }
.contact-list .ci .v { font-size: 17px; font-weight: 700; color: var(--brand-primary); margin-top: 5px; letter-spacing: .03em; word-break: break-all; }
.contact-list .ci .v small { display: block; font-size: 13px; color: var(--c-text-2); font-weight: 400; margin-top: 5px; letter-spacing: .02em; }

.qr-card { background: var(--c-bg-soft); padding: 36px; text-align: center; border-top: 4px solid var(--brand-accent); }
.qr-card img { width: 210px; height: 210px; margin: 0 auto; background: #fff; padding: 12px; box-shadow: var(--shadow-s); }
.qr-card h3 { font-size: 19px; font-weight: 800; color: var(--brand-primary); margin-bottom: 8px; letter-spacing: .08em; }
.qr-card p { font-size: 13.5px; color: var(--c-text-2); line-height: 1.8; }
.qr-card .qr-sub { margin-top: 18px; font-size: 12px; color: var(--c-text-2); letter-spacing: .14em; }

.map-box { margin-top: 34px; border: 1px solid var(--c-line); background: var(--c-bg-soft); padding: 26px; }
.map-box h3 { font-size: 16.5px; color: var(--brand-primary); font-weight: 800; letter-spacing: .06em; margin-bottom: 10px; }
.map-box p { font-size: 14px; color: var(--c-text-2); line-height: 1.9; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: var(--brand-primary-d2); color: rgba(255, 255, 255, .72); padding: 62px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.15fr; gap: 40px; padding-bottom: 46px; }
.footer-brand img { height: 46px; margin-bottom: 20px; }
.footer-brand p { font-size: 13.5px; line-height: 1.95; color: rgba(255, 255, 255, .62); }
.footer-col h4 {
  font-size: 15px; font-weight: 800; color: var(--c-white); letter-spacing: .14em; margin-bottom: 20px;
  padding-bottom: 12px; border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.footer-col li { margin-bottom: 12px; }
.footer-col a { font-size: 13.5px; color: rgba(255, 255, 255, .68); }
.footer-col a:hover { color: var(--brand-accent-on-dark); padding-left: 4px; }
.footer-col .fc-line { display: flex; gap: 10px; font-size: 13.5px; margin-bottom: 13px; line-height: 1.7; }
.footer-col .fc-line svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--brand-accent-on-dark); }
.footer-col .fc-line b { color: var(--c-white); font-weight: 700; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12); padding: 20px 0; display: flex;
  justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: rgba(255, 255, 255, .5);
}
.footer-bottom a { color: rgba(255, 255, 255, .5); }
.footer-bottom a:hover { color: var(--brand-accent-on-dark); }

/* 返回顶部 */
.to-top {
  position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; z-index: 800;
  background: var(--brand-primary); color: var(--c-white); display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .3s; box-shadow: var(--shadow-m);
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--brand-accent); }
.to-top svg { width: 20px; height: 20px; }

/* 滚动淡入 */
html.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
html.js .reveal.in { opacity: 1; transform: none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .main-nav { gap: 0; }
  .main-nav > li > a { padding: 10px 11px; font-size: 14.5px; }
  .tel-box { display: none; }
  .split { gap: 34px; }
  .flow { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  :root { --hd: 64px; }
  /* 修复（2026-10-02 发现，原站既有缺陷）：.site-header 上的 backdrop-filter 会成为
     position:fixed 后代的「包含块」，导致下方 .main-nav 面板按 74px 高的头部来算
     top/bottom，高度塌陷为 0、菜单在手机上完全打不开。移动端去掉该滤镜即可恢复。 */
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; top: var(--hd); left: 0; right: 0; bottom: 0; background: var(--c-white);
    flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 0;
    padding: 12px 0 40px; flex: none;
    overflow-y: auto; transform: translateX(100%); transition: transform .32s ease; z-index: 890;
  }
  .main-nav.open { transform: none; }
  .main-nav > li > a { padding: 16px 24px; font-size: 16px; color: var(--c-text); border-bottom: 1px solid var(--c-line); }
  .main-nav > li.active > a::after { display: none; }
  .main-nav > li.active > a { border-left: 4px solid var(--brand-accent); }
  .sub-nav {
    position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none;
    border: 0; border-bottom: 1px solid var(--c-line); padding: 0; background: var(--c-bg-soft);
  }
  .sub-nav a { padding: 13px 40px; }
  /* 移动端面板里不需要下拉指示三角（选择器同步提高优先级，见文件上方说明） */
  ul.main-nav > li.has-sub > a::before { display: none; }
  .hero { min-height: auto; padding: calc(var(--hd) + 46px) 0 54px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2n) { border-right: 0; }
  .prod-grid, .cap-grid, .mvv-grid, .cert-grid, .contact-grid, .detail-grid { grid-template-columns: 1fr; }
  .split, .split.rev .split-txt { grid-template-columns: 1fr; order: 0; }
  .split-media .badge-corner { left: 0; bottom: 0; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .quote-box { padding: 40px 28px; }
  .flow { grid-template-columns: 1fr 1fr; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .pad { padding: 58px 0; }
  .wrap { padding: 0 18px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 12px; }
  .stat .sv { font-size: 18px; letter-spacing: .02em; }
  .stat .sk { font-size: 12px; letter-spacing: .06em; }
  .hero h1 { font-size: 30px; letter-spacing: .05em; }
  .hero-sub { font-size: 14px; letter-spacing: .05em; padding-left: 12px; }
  .hero-desc { font-size: 14.5px; }
  .quote-box p { font-size: 14.5px; line-height: 2; }
  .sec-title { letter-spacing: .04em; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .cert { grid-template-columns: 1fr; }
  .cert img { max-width: 200px; }
  .hero-cats span { padding: 8px 15px; font-size: 12.5px; letter-spacing: .14em; }
  .btn { padding: 13px 24px; font-size: 14px; }
  .detail-grid .dg-media .dg-multi { grid-template-columns: 1fr; }
  .tag-strip span { padding: 9px 18px; font-size: 13px; letter-spacing: .14em; }
  .qr-card { padding: 28px 20px; }
  .qr-card img { width: 180px; height: 180px; }
}

/* ============ 页头紧凑化与语言切换（放最后，保证优先级）============
   背景：头部内容容器固定 max-width:1200px（内容区 1152px）。语言切换按钮占 ~74px，
   加入后实测中文头需 ~1380px、英文头需 ~1400px，会在 1240–1440px 把右侧
   「联系我们」按钮挤出屏幕。处理：
   ① 隐藏与 logo 重复的英文公司名行（.brand-txt .bs），保留中文定位语；
   ② 中文导航内边距 16→12px；
   ③ 英文版英文标语本身更长，整块品牌标语隐藏，并进一步收紧导航。 */
.brand-txt .bs { display: none; }
.main-nav > li > a { padding: 10px 12px; }
.main-nav > li.active > a::after { left: 12px; right: 12px; }
/* 中文「产品中心」的下拉三角位由文件上方 ul.main-nav > li.has-sub > a 统一给（padding-right:26px），
   此处不再重复声明，避免又被简写 padding 覆盖。 */

.lang-en .brand-txt { display: none; }
.lang-en .main-nav { gap: 0; }
.lang-en .main-nav > li > a { padding: 10px 11px; font-size: 14px; letter-spacing: 0; }
.lang-en .main-nav > li.active > a::after { left: 11px; right: 11px; }
/* 英文版字号更小，三角位再收紧 2px（选择器同样带 ul.main-nav 保优先级） */
.lang-en ul.main-nav > li.has-sub > a { padding-right: 24px; }
.lang-en ul.main-nav > li.has-sub > a::before { right: 10px; }

/* 导航右对齐，与「联系方式 + 按钮」贴成一排（移动端菜单为 fixed 面板，不适用） */
@media (min-width: 901px) {
  .header-inner > nav { flex: 1 1 auto; min-width: 0; display: flex; justify-content: flex-end; }
}

@media (max-width: 1240px) {
  .main-nav > li > a { padding: 10px 11px; font-size: 14.5px; }
  .lang-en .header-inner { gap: 14px; }
  .lang-en .header-cta { gap: 10px; }
}

/* 窄屏：语言按钮 / 电话按钮 / 品牌 logo 逐级收窄，确保 390px 仍能放下汉堡菜单 */
@media (max-width: 560px) {
  .brand img { height: 38px; }
  .header-inner { gap: 12px; }
  .header-cta { gap: 9px; }
  .header-cta .btn { padding: 10px 14px; font-size: 13px; }
  .lang-switch { padding: 0 9px; gap: 5px; font-size: 12px; }
  .lang-switch svg { width: 13px; height: 13px; }
}
@media (max-width: 430px) {
  .wrap { padding: 0 14px; }
  .brand img { height: 33px; }
  .header-inner { gap: 10px; }
  .header-cta { gap: 7px; }
  .header-cta .btn { padding: 9px 11px; font-size: 12.5px; }
  .lang-switch span { display: none; }
  .lang-switch { padding: 0 8px; }
  .nav-toggle { width: 38px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* 打印 */
@media print {
  .site-header, .to-top, .cta-band, .hero-actions { display: none !important; }
  body { font-size: 12pt; }
  .hero, .page-hero, .bg-deep, .bg-deep-2, .quote-box, .site-footer { background: #fff !important; color: #000 !important; }
}