/* ==========================================================================
   宁波市鸿博机械制造有限公司 · 官网设计系统
   Ningbo Hongbo Machinery Co., Ltd. — Corporate Website Design System
   Version 2.0 | 2026-09

   设计语言：工业精密 × 数字科技
   色彩约束（经 WCAG 2.2 实测）：品牌红 #DD0635 在深底上对比度 3.22–3.58:1，
   仅可用于 ≥24px 大字、图标、色块、按钮底色；禁止用于小号正文文字。
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 字体（自托管，SIL OFL 开源许可，零外链）
   -------------------------------------------------------------------------- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/inter-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/inter-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Noto Sans SC';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/noto-sans-sc-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Noto Sans SC';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/noto-sans-sc-700.woff2') format('woff2');
}

/* --------------------------------------------------------------------------
   2. 设计令牌
   -------------------------------------------------------------------------- */
:root {
  /* 色彩 */
  --c-bg:          #0A1628;
  --c-bg-deep:     #061020;
  --c-surface:     #10203A;
  --c-surface-2:   #16294A;
  --c-surface-3:   #1C3155;
  --c-line:        rgba(255, 255, 255, 0.09);
  --c-line-strong: rgba(255, 255, 255, 0.16);

  --c-brand:       #DD0635;
  --c-brand-deep:  #C00530;
  --c-brand-soft:  rgba(221, 6, 53, 0.14);
  --c-tech:        #00C8E8;
  --c-tech-soft:   rgba(0, 200, 232, 0.12);
  --c-metal:       #8B95A5;
  --c-gold:        #FFC94D;

  --c-text:        #E8EDF5;
  --c-text-dim:    #94A3B8;
  --c-text-mute:   #6B7A90;

  /* 排版 */
  --f-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont,
            'PingFang SC', 'Hiragino Sans GB', 'Source Han Sans SC',
            'Microsoft YaHei', sans-serif;
  --f-num: 'Inter', ui-monospace, 'SF Mono', monospace;

  /* 尺度 */
  --maxw: 1320px;
  --maxw-narrow: 900px;
  --nav-h: 76px;
  --r-card: 12px;
  --r-btn: 6px;
  --r-tag: 4px;

  /* 间距 */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-6: 48px;
  --sp-8: 64px;
  --sp-10: 80px;
  --sp-12: 96px;
  --sp-16: 128px;

  /* 阴影 */
  --sh-1: 0 1px 2px rgba(0, 0, 0, 0.28);
  --sh-2: 0 4px 16px rgba(0, 0, 0, 0.32);
  --sh-3: 0 16px 48px rgba(0, 0, 0, 0.44);
  --sh-brand: 0 8px 28px rgba(221, 6, 53, 0.26);
}

/* --------------------------------------------------------------------------
   3. 基础重置
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.72;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, p { margin: 0; }
table { border-collapse: collapse; width: 100%; }

::selection { background: var(--c-brand); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--c-bg-deep); }
::-webkit-scrollbar-thumb { background: #24374F; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #33506F; }

/* --------------------------------------------------------------------------
   4. 排版
   -------------------------------------------------------------------------- */
.h1, h1 {
  font-size: clamp(34px, 4.6vw, 60px);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -0.022em;
}
.h2, h2 {
  font-size: clamp(26px, 3.1vw, 42px);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -0.018em;
}
.h3, h3 {
  font-size: clamp(19px, 1.7vw, 24px);
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.h4, h4 {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
}

.lead {
  font-size: clamp(16px, 1.35vw, 18.5px);
  line-height: 1.78;
  color: var(--c-text-dim);
}
.small { font-size: 13.5px; line-height: 1.6; color: var(--c-text-dim); }
.tiny  { font-size: 12.5px; line-height: 1.55; color: var(--c-text-mute); }

.num   { font-family: var(--f-num); font-variant-numeric: tabular-nums; }
.mono  { font-family: var(--f-num); letter-spacing: 0.02em; }

/* 品牌红仅用于大字（≥24px 或粗体大字） */
.brand-text {
  color: var(--c-brand);
  font-weight: 700;
  font-size: clamp(24px, 2.2vw, 30px);
  line-height: 1.3;
}
.tech-text { color: var(--c-tech); }

/* 英文小标签 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-num);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-tech);
}
.eyebrow::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--c-brand);
  flex: none;
}
.eyebrow.no-rule::before { display: none; }

/* --------------------------------------------------------------------------
   5. 布局
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
.wrap-narrow { max-width: var(--maxw-narrow); }

.section { padding: var(--sp-16) 0; position: relative; }
.section--tight { padding: var(--sp-12) 0; }
.section--dark { background: var(--c-bg-deep); }
.section--surface { background: var(--c-surface); }

/* 工程网格底纹 */
.section--grid::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 20%, transparent 78%);
}
.section > .wrap { position: relative; z-index: 1; }

/* 区块标题 */
.sec-head { max-width: 780px; margin-bottom: var(--sp-8); }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head--center .eyebrow { justify-content: center; }
.sec-head h2 { margin: 14px 0 16px; }
.sec-head p { color: var(--c-text-dim); font-size: 16.5px; }
.sec-head--split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: var(--sp-8);
  align-items: end;
}
.sec-head--split h2 { margin-bottom: 0; }
.sec-head--split p { margin-bottom: 6px; }

/* 通用栅格 */
.grid { display: grid; gap: var(--sp-3); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

/* 非对称两栏。列宽由 --g2 变量提供（内联只设变量，不设 grid-template-columns，
   否则媒体查询无法覆盖——这是本项目早期一处移动端压扁缺陷的根因）。
   用法：<div class="grid g2" style="--g2:minmax(0,1.08fr) minmax(0,1fr)"> */
.g2 {
  display: grid;
  gap: var(--sp-8);
  align-items: var(--g2-align, start);
  grid-template-columns: var(--g2, minmax(0, 1fr) minmax(0, 1fr));
}
.gap-lg { gap: var(--sp-4); }

/* --------------------------------------------------------------------------
   6. 导航
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(10, 22, 40, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .28s ease, border-color .28s ease;
}
.nav.is-scrolled {
  background: rgba(8, 17, 32, 0.94);
  border-bottom-color: var(--c-line);
}
.nav__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

/* 品牌 */
.brand { display: flex; align-items: center; gap: 11px; flex: none; }
.brand__mark { height: 32px; width: auto; flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.16; }
.brand__cn {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  white-space: nowrap;
}
.brand__en {
  font-family: var(--f-num);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--c-text-mute);
  white-space: nowrap;
}

/* 主菜单 */
.nav__menu { display: flex; align-items: center; gap: 1px; margin-left: auto; }
.nav__link {
  position: relative;
  display: block;
  padding: 9px 9px;
  font-size: 13.8px;
  font-weight: 500;
  color: var(--c-text-dim);
  border-radius: 6px;
  transition: color .2s ease, background .2s ease;
  white-space: nowrap;
}
.nav__link:hover { color: #fff; background: rgba(255, 255, 255, 0.055); }
.nav__link.is-active { color: #fff; }
.nav__link.is-active::after {
  content: '';
  position: absolute;
  left: 9px; right: 9px; bottom: 3px;
  height: 2px;
  background: var(--c-brand);
  border-radius: 2px;
}

/* 导航右侧动作 */
.nav__actions { display: flex; align-items: center; gap: 10px; flex: none; margin-left: 14px; }

/* 邮箱入口（特异色，突出显示） */
.nav__mail {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 15px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--r-btn);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-text);
  transition: border-color .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.nav__mail:hover { border-color: var(--c-tech); color: var(--c-tech); background: var(--c-tech-soft); }
.nav__mail svg { width: 15px; height: 15px; flex: none; }

/* 语言切换 */
.lang {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-btn);
  font-family: var(--f-num);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-text-dim);
  transition: color .2s, border-color .2s;
}
.lang:hover { color: #fff; border-color: var(--c-line-strong); }

/* 汉堡 */
.nav__burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-btn);
  position: relative;
}
.nav__burger span {
  position: absolute;
  left: 11px; right: 11px;
  height: 1.8px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform .26s ease, opacity .2s ease, top .26s ease;
}
.nav__burger span:nth-child(1) { top: 14px; }
.nav__burger span:nth-child(2) { top: 20px; }
.nav__burger span:nth-child(3) { top: 26px; }
.nav.is-open .nav__burger span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__burger span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* 移动端抽屉 */
.nav__drawer {
  position: fixed;
  top: var(--nav-h); left: 0; right: 0; bottom: 0;
  z-index: 99;
  background: var(--c-bg-deep);
  border-top: 1px solid var(--c-line);
  padding: var(--sp-3) 28px var(--sp-8);
  overflow-y: auto;
  display: none;
}
.nav.is-open .nav__drawer { display: block; }
.nav__drawer a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 2px;
  font-size: 17px;
  font-weight: 500;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-line);
}
.nav__drawer a small { font-family: var(--f-num); font-size: 11px; color: var(--c-text-mute); letter-spacing: .1em; }
.nav__drawer .drawer-cta { margin-top: var(--sp-4); display: grid; gap: 12px; }

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: min(88vh, 780px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: calc(var(--nav-h) + 72px) 0 0;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 46%;
  opacity: 0.5;
  filter: saturate(0.78) contrast(1.05);
}
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 22, 40, 0.84) 0%, rgba(10, 22, 40, 0.56) 42%, rgba(10, 22, 40, 0.96) 86%, var(--c-bg) 100%),
    linear-gradient(90deg, rgba(10, 22, 40, 0.93) 0%, rgba(10, 22, 40, 0.46) 48%, rgba(10, 22, 40, 0.2) 100%);
}
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.032) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(180deg, transparent 0%, #000 30%, #000 62%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 30%, #000 62%, transparent 100%);
}
.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.hero__body { max-width: 760px; padding-bottom: var(--sp-10); }
.hero h1 { margin: 18px 0 22px; }
.hero h1 em {
  font-style: normal;
  display: block;
  color: var(--c-brand);
}
.hero__lead {
  font-size: clamp(16px, 1.4vw, 18.5px);
  line-height: 1.8;
  color: var(--c-text-dim);
  max-width: 640px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: var(--sp-4); }

/* Hero 底部数据带 */
.hero__stats {
  position: relative;
  z-index: 2;
  flex: none;
  border-top: 1px solid var(--c-line);
  background: rgba(6, 16, 32, 0.62);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hero__stats-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}
.hero__stat {
  padding: 26px 22px;
  border-right: 1px solid var(--c-line);
}
.hero__stat:last-child { border-right: none; }
.hero__stat dt {
  font-family: var(--f-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-mute);
  margin-bottom: 8px;
}
.hero__stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
}
.hero__stat .v {
  font-family: var(--f-num);
  font-size: clamp(26px, 2.5vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #fff;
}
.hero__stat .u { font-size: 12.5px; color: var(--c-text-mute); }

/* 紧凑 Hero（内页） */
.page-head {
  position: relative;
  padding: calc(var(--nav-h) + 78px) 0 66px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
  background: var(--c-bg-deep);
}
.page-head__bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, #000, transparent 92%);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 92%);
}
.page-head__glow {
  position: absolute;
  top: -180px; right: -120px;
  width: 620px; height: 460px;
  background: radial-gradient(closest-side, rgba(221, 6, 53, 0.16), transparent 72%);
  pointer-events: none;
}
.page-head .wrap { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--c-text-mute);
  margin-bottom: 20px;
}
.breadcrumb a:hover { color: var(--c-tech); }
.breadcrumb span { opacity: .5; }
.page-head h1 { font-size: clamp(30px, 3.7vw, 48px); margin-bottom: 18px; }
.page-head .lead { max-width: 720px; }
.page-head__meta {
  display: flex; flex-wrap: wrap; gap: 26px;
  margin-top: var(--sp-4); padding-top: var(--sp-3);
  border-top: 1px solid var(--c-line);
}
.page-head__meta div { display: flex; flex-direction: column; gap: 3px; }
.page-head__meta dt { font-family: var(--f-num); font-size: 11px; letter-spacing: .13em; text-transform: uppercase; color: var(--c-text-mute); }
.page-head__meta dd { margin: 0; font-size: 15px; font-weight: 600; color: #fff; }

/* --------------------------------------------------------------------------
   8. 按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 48px;
  padding: 0 26px;
  border-radius: var(--r-btn);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform .18s ease, box-shadow .22s ease, background .22s ease,
              border-color .22s ease, color .22s ease;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex: none; }
/* 主 CTA：深红底白字（6.35:1，优于品牌红 5.06:1） */
.btn--primary {
  background: var(--c-brand-deep);
  color: #fff;
  box-shadow: var(--sh-brand);
}
.btn--primary:hover { background: var(--c-brand); transform: translateY(-1px); box-shadow: 0 10px 32px rgba(221,6,53,.34); }
.btn--ghost {
  border: 1px solid var(--c-line-strong);
  color: var(--c-text);
}
.btn--ghost:hover { border-color: var(--c-tech); color: var(--c-tech); background: var(--c-tech-soft); }
.btn--sm { height: 40px; padding: 0 18px; font-size: 14px; }
.btn--block { width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--c-tech);
}
.link-arrow svg { width: 15px; height: 15px; transition: transform .22s ease; }
.link-arrow:hover svg { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   9. 卡片与容器
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  padding: var(--sp-4);
  transition: transform .26s ease, border-color .26s ease, box-shadow .26s ease, background .26s ease;
  overflow: hidden;
}
.card--hover:hover {
  transform: translateY(-3px);
  border-color: var(--c-line-strong);
  box-shadow: var(--sh-3);
}
.card--flush { padding: 0; }
.card__pad { padding: var(--sp-4); }

/* 卡片顶部红色强调线 */
.card--accent::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 48px; height: 2.5px;
  background: var(--c-brand);
}

/* 编号卡 */
.card__idx {
  font-family: var(--f-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-brand);
  display: block;
  margin-bottom: 18px;
}

/* 图标块 */
.ico {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--c-brand-soft);
  border: 1px solid rgba(221, 6, 53, 0.24);
  color: var(--c-brand);
  margin-bottom: 20px;
  flex: none;
}
.ico svg { width: 23px; height: 23px; }
.ico--tech { background: var(--c-tech-soft); border-color: rgba(0, 200, 232, 0.26); color: var(--c-tech); }
.ico--plain { background: rgba(255,255,255,.045); border-color: var(--c-line); color: var(--c-metal); }
.ico--sm { width: 38px; height: 38px; border-radius: 8px; margin-bottom: 0; }
.ico--sm svg { width: 19px; height: 19px; }

/* 图片框 */
.frame {
  position: relative;
  border-radius: var(--r-card);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
}
.frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.03);
  transition: transform .6s cubic-bezier(.2,.7,.3,1);
}
.frame--hover:hover img { transform: scale(1.035); }
.frame__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 34px 18px 15px;
  background: linear-gradient(180deg, transparent, rgba(6, 16, 32, 0.92));
  font-size: 13.5px;
  font-weight: 500;
  color: #fff;
}
.frame__tag {
  position: absolute;
  top: 13px; left: 13px;
  padding: 5px 11px;
  border-radius: var(--r-tag);
  background: rgba(6, 16, 32, 0.78);
  backdrop-filter: blur(6px);
  border: 1px solid var(--c-line-strong);
  font-family: var(--f-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--c-tech);
}
.frame-16-9 { aspect-ratio: 16 / 9; }
.frame-4-3  { aspect-ratio: 4 / 3; }
.frame-3-2  { aspect-ratio: 3 / 2; }
.frame-1-1  { aspect-ratio: 1 / 1; }
.frame-21-9 { aspect-ratio: 21 / 9; }
.frame-3-4  { aspect-ratio: 3 / 4; }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-tag);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--c-line);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--c-text-dim);
}
.tag--brand { background: var(--c-brand-soft); border-color: rgba(221,6,53,.26); color: #FF7A91; }
.tag--tech  { background: var(--c-tech-soft);  border-color: rgba(0,200,232,.24); color: var(--c-tech); }
.tag--gold  { background: rgba(255,201,77,.11); border-color: rgba(255,201,77,.26); color: var(--c-gold); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }

/* 产品结构示意图（工程线描，用于暂无高清实拍的系列） */
.prod-media {
  display: grid;
  place-items: center;
  aspect-ratio: 4 / 3;
  padding: 18px;
  background-color: var(--c-bg-deep);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px);
  background-size: 22px 22px;
}
.prod-media .prod-svg { width: 100%; height: auto; }

/* --------------------------------------------------------------------------
   10. 数据展示
   -------------------------------------------------------------------------- */
/* 指标块 */
.stat {
  padding: var(--sp-3) 0 var(--sp-3) 22px;
  border-left: 2px solid var(--c-line-strong);
}
.stat--brand { border-left-color: var(--c-brand); }
.stat--tech  { border-left-color: var(--c-tech); }
.stat__v {
  font-family: var(--f-num);
  font-size: clamp(30px, 3.2vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.028em;
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.stat__v .u { font-size: 15px; font-weight: 600; color: var(--c-text-dim); letter-spacing: 0; }
.stat__v .pre { font-size: 0.6em; color: var(--c-text-dim); }
.stat__k {
  margin-top: 10px;
  font-size: 14px;
  color: var(--c-text-dim);
}
.stat__n { margin-top: 4px; font-size: 12.5px; color: var(--c-text-mute); }

/* 数据面板（大号） */
.stat-panel {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}
/* 列数变体：以语义类表达，避免内联 grid-template-columns 压过媒体查询 */
.stat-panel--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat-panel--5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.stat-panel__cell {
  background: var(--c-surface);
  padding: 30px 26px;
}
.stat-panel__cell .k {
  font-family: var(--f-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--c-text-mute);
  margin-bottom: 12px;
}
.stat-panel__cell .v {
  font-family: var(--f-num);
  font-size: clamp(28px, 2.8vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.025em;
  color: #fff;
}
.stat-panel__cell .v .u { font-size: 0.42em; font-weight: 600; color: var(--c-text-dim); margin-left: 3px; }
.stat-panel__cell .n { margin-top: 9px; font-size: 13px; color: var(--c-text-mute); line-height: 1.55; }

/* 进度条 */
.bar { height: 6px; border-radius: 3px; background: rgba(255,255,255,.08); overflow: hidden; }
.bar__fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--c-brand-deep), var(--c-brand)); width: 0; transition: width 1.2s cubic-bezier(.2,.7,.3,1); }
.bar--tech .bar__fill { background: linear-gradient(90deg, #0090AE, var(--c-tech)); }
.bar-row { display: grid; gap: 9px; }
.bar-row__head { display: flex; justify-content: space-between; align-items: baseline; font-size: 14px; }
.bar-row__head b { font-family: var(--f-num); font-weight: 700; color: #fff; }

/* 设备能力表 */
.spec-table { border: 1px solid var(--c-line); border-radius: var(--r-card); overflow: hidden; }
.spec-table table { font-size: 14.5px; }
.spec-table thead th {
  background: var(--c-surface-2);
  padding: 15px 18px;
  text-align: left;
  font-family: var(--f-num);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  border-bottom: 1px solid var(--c-line);
  white-space: nowrap;
}
.spec-table tbody td {
  padding: 17px 18px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-text-dim);
  vertical-align: top;
}
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table tbody tr:hover td { background: rgba(255,255,255,.022); }
.spec-table .c-strong { color: #fff; font-weight: 600; }
.spec-table .c-num { font-family: var(--f-num); font-weight: 700; color: var(--c-brand); font-size: 18px; }

/* --------------------------------------------------------------------------
   11. 工艺链路
   -------------------------------------------------------------------------- */
.flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}
.flow__step {
  background: var(--c-surface);
  padding: 28px 22px 26px;
  position: relative;
  transition: background .24s ease;
}
.flow__step:hover { background: var(--c-surface-2); }
.flow__step::after {
  content: '';
  position: absolute;
  right: -1px; top: 50%;
  width: 9px; height: 9px;
  margin-top: -4.5px;
  border-top: 1px solid var(--c-line-strong);
  border-right: 1px solid var(--c-line-strong);
  transform: rotate(45deg) translateY(-50%);
  background: var(--c-surface);
  z-index: 2;
}
.flow__step:last-child::after { display: none; }
.flow__n {
  font-family: var(--f-num);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--c-brand);
  margin-bottom: 14px;
}
.flow__step h4 { margin-bottom: 8px; }
.flow__step p { font-size: 13.5px; color: var(--c-text-mute); line-height: 1.62; }
.flow__meta {
  margin-top: 16px; padding-top: 14px;
  border-top: 1px dashed var(--c-line);
  font-family: var(--f-num);
  font-size: 13px;
  color: var(--c-tech);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   12. 时间轴
   -------------------------------------------------------------------------- */
.tl { position: relative; }
.tl::before {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 9px;
  height: 1px;
  background: var(--c-line-strong);
}
.tl__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 8px;
}
.tl__item { position: relative; padding-top: 32px; min-width: 120px; }
.tl__item::before {
  content: '';
  position: absolute;
  left: 0; top: 4px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 2px solid var(--c-metal);
}
.tl__item--key::before { border-color: var(--c-brand); background: var(--c-brand); box-shadow: 0 0 0 4px rgba(221,6,53,.16); }
.tl__y {
  font-family: var(--f-num);
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 7px;
}
.tl__t { font-size: 13.5px; color: var(--c-text-dim); line-height: 1.6; }

/* 竖向时间轴（历程） */
.tl-v { position: relative; padding-left: 30px; }
.tl-v::before {
  content: '';
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-brand), var(--c-line-strong) 30%, var(--c-line));
}
.tl-v__item { position: relative; padding-bottom: 30px; }
.tl-v__item:last-child { padding-bottom: 0; }
.tl-v__item::before {
  content: '';
  position: absolute;
  left: -30px; top: 5px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 2px solid var(--c-metal);
}
.tl-v__item--key::before { border-color: var(--c-brand); background: var(--c-brand); }
.tl-v__y { font-family: var(--f-num); font-size: 15px; font-weight: 700; color: var(--c-tech); margin-bottom: 5px; }
.tl-v__t { font-size: 14.5px; color: var(--c-text-dim); }
.tl-v__t b { color: #fff; font-weight: 600; }

/* --------------------------------------------------------------------------
   13. 列表与条目
   -------------------------------------------------------------------------- */
/* 特性列表 */
.feat { display: grid; gap: 16px; }
.feat__row { display: flex; gap: 14px; align-items: flex-start; }
.feat__mark {
  width: 22px; height: 22px;
  flex: none;
  margin-top: 2px;
  border-radius: 50%;
  background: var(--c-brand-soft);
  border: 1px solid rgba(221,6,53,.28);
  display: grid; place-items: center;
  color: var(--c-brand);
}
.feat__mark svg { width: 12px; height: 12px; }
.feat__mark--tech { background: var(--c-tech-soft); border-color: rgba(0,200,232,.3); color: var(--c-tech); }
.feat__row strong { display: block; color: #fff; font-weight: 600; font-size: 15px; margin-bottom: 3px; }
.feat__row p { font-size: 14px; color: var(--c-text-mute); line-height: 1.66; }

/* 键值行 */
.kv { display: grid; gap: 0; }
.kv__row {
  display: grid;
  grid-template-columns: var(--kv-a, 150px) minmax(0, 1fr);
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--c-line);
}
.kv__row:last-child { border-bottom: none; }
.kv__k { font-size: 14px; color: var(--c-text-mute); }
.kv__v { font-size: 15px; color: var(--c-text); }
.kv__v b { color: #fff; font-weight: 600; }

/* 客户条目 */
.client-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
}
.client-row__cell {
  background: var(--c-surface);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background .24s ease;
}
.client-row__cell:hover { background: var(--c-surface-2); }
.client-row__cell .nm { font-size: 16px; font-weight: 700; color: #fff; letter-spacing: .01em; }
.client-row__cell .ds { font-size: 13px; color: var(--c-text-mute); line-height: 1.6; }
.client-row__cell .bd { font-family: var(--f-num); font-size: 11.5px; color: var(--c-tech); letter-spacing: .06em; }

/* 里程碑卡 */
.milestone {
  border-left: 2px solid var(--c-line-strong);
  padding: 4px 0 4px 20px;
}
.milestone--key { border-left-color: var(--c-brand); }
.milestone__y { font-family: var(--f-num); font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--c-tech); margin-bottom: 7px; }
.milestone h4 { margin-bottom: 7px; }
.milestone p { font-size: 14px; color: var(--c-text-mute); line-height: 1.66; }

/* 证书卡 */
.cert {
  background: #fff;
  border-radius: var(--r-card);
  padding: 12px;
  box-shadow: var(--sh-2);
  transition: transform .26s ease, box-shadow .26s ease;
}
.cert:hover { transform: translateY(-3px); box-shadow: var(--sh-3); }
/* aspect-ratio 预留占位，避免懒加载图片在载入前高度塌陷为 0（既造成 CLS，也会让图片永不进入视口） */
.cert img {
  border-radius: 6px;
  width: 100%;
  aspect-ratio: 1000 / 1410;
  object-fit: cover;
  background: #EEF2F7;
}
.cert__meta { padding: 12px 4px 4px; color: #0A1628; }
.cert__meta .nm { font-size: 14.5px; font-weight: 700; line-height: 1.4; }
.cert__meta .vl { margin-top: 4px; font-family: var(--f-num); font-size: 12px; color: #5A6B80; }

/* --------------------------------------------------------------------------
   14. 新闻 / 招聘
   -------------------------------------------------------------------------- */
.post-list { display: grid; gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); border-radius: var(--r-card); overflow: hidden; }
.post {
  background: var(--c-surface);
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr) auto;
  gap: var(--sp-3);
  align-items: center;
  padding: 20px 24px;
  transition: background .22s ease;
}
.post:hover { background: var(--c-surface-2); }
.post__thumb { aspect-ratio: 16/10; border-radius: 8px; overflow: hidden; border: 1px solid var(--c-line); }
.post__thumb img { width: 100%; height: 100%; object-fit: cover; }
.post__body h4 { font-size: 17px; margin-bottom: 7px; line-height: 1.45; }
.post__body h4 a:hover { color: var(--c-tech); }
.post__meta {
  display: flex; flex-wrap: wrap; gap: 14px;
  font-family: var(--f-num);
  font-size: 12.5px;
  color: var(--c-text-mute);
}
.post__meta .cat { color: var(--c-brand); font-weight: 600; }
.post__excerpt { margin-top: 9px; font-size: 14px; color: var(--c-text-mute); line-height: 1.64; }
.post__go { color: var(--c-metal); transition: color .2s, transform .2s; }
.post__go:hover { color: var(--c-tech); }
.post__go svg { width: 20px; height: 20px; }

/* 职位卡 */
.job {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--sp-3);
  align-items: center;
  padding: 24px 26px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  transition: border-color .24s ease, transform .24s ease;
}
.job:hover { border-color: var(--c-line-strong); transform: translateY(-2px); }
.job h4 { font-size: 17px; margin-bottom: 9px; }
.job__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.job__side { text-align: right; display: grid; gap: 10px; justify-items: end; }

/* --------------------------------------------------------------------------
   15. 联系与邮箱入口
   -------------------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: var(--sp-6); align-items: start; }

.mail-entry {
  position: relative;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--r-card);
  padding: var(--sp-4);
  background: linear-gradient(150deg, rgba(221,6,53,.10), rgba(16,32,58,.9) 46%, var(--c-surface));
  overflow: hidden;
}
.mail-entry::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2.5px;
  background: linear-gradient(90deg, var(--c-brand), transparent 62%);
}
.mail-entry__ico {
  width: 52px; height: 52px;
  border-radius: 11px;
  background: var(--c-brand-soft);
  border: 1px solid rgba(221,6,53,.3);
  display: grid; place-items: center;
  color: var(--c-brand);
  margin-bottom: 20px;
}
.mail-entry__ico svg { width: 26px; height: 26px; }
.mail-entry h3 { margin-bottom: 12px; }
.mail-entry p { color: var(--c-text-dim); font-size: 14.5px; }
.mail-entry__actions { margin-top: var(--sp-3); display: grid; gap: 11px; }
.mail-entry__url {
  font-family: var(--f-num);
  font-size: 12.5px;
  color: var(--c-text-mute);
  word-break: break-all;
}

/* 联系信息块 */
.cinfo { display: grid; gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); border-radius: var(--r-card); overflow: hidden; }
.cinfo__row {
  background: var(--c-surface);
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 24px;
  align-items: start;
}
.cinfo__row .lbl { font-size: 13px; color: var(--c-text-mute); margin-bottom: 5px; font-family: var(--f-num); letter-spacing: .05em; }
.cinfo__row .val { font-size: 15.5px; color: var(--c-text); line-height: 1.6; }
.cinfo__row .val a:hover { color: var(--c-tech); }

/* --------------------------------------------------------------------------
   16. CTA 带
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  border-radius: var(--r-card);
  border: 1px solid var(--c-line-strong);
  background:
    radial-gradient(ellipse 60% 130% at 88% 12%, rgba(221,6,53,.20), transparent 62%),
    linear-gradient(120deg, var(--c-surface-2), var(--c-surface) 62%);
  padding: var(--sp-8) var(--sp-6);
  overflow: hidden;
}
.cta-band::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.026) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(90deg, #000, transparent 74%);
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 74%);
  pointer-events: none;
}
.cta-band__inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--sp-6);
  align-items: center;
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { color: var(--c-text-dim); font-size: 16px; max-width: 620px; }
.cta-band__actions { display: flex; gap: 13px; flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   17. 页脚
   -------------------------------------------------------------------------- */
.foot {
  background: var(--c-bg-deep);
  border-top: 1px solid var(--c-line);
  padding: var(--sp-12) 0 0;
  font-size: 14.5px;
}
.foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)) minmax(0, 1.3fr);
  gap: var(--sp-6);
  padding-bottom: var(--sp-8);
}
.foot__brand .brand { margin-bottom: 20px; }
.foot__brand p { color: var(--c-text-mute); font-size: 14px; line-height: 1.75; max-width: 320px; }
.foot__col h5 {
  font-family: var(--f-num);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-text-mute);
  margin: 0 0 18px;
}
.foot__col li { margin-bottom: 11px; }
.foot__col a { color: var(--c-text-dim); font-size: 14.5px; transition: color .2s; }
.foot__col a:hover { color: var(--c-tech); }
.foot__contact { display: grid; gap: 14px; }
.foot__contact div { display: flex; gap: 11px; align-items: flex-start; color: var(--c-text-dim); font-size: 14px; line-height: 1.62; }
.foot__contact svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--c-tech); }
.foot__contact a:hover { color: var(--c-tech); }

/* 备案区（合规必需，字号 ≥12px 清晰可读，禁用品牌红） */
.foot__beian {
  border-top: 1px solid var(--c-line);
  padding: 22px 0 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.beian-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  font-size: 13.5px;
  color: var(--c-text-dim);
  line-height: 1.7;
}
.beian-links a {
  color: var(--c-text-dim);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .2s;
}
.beian-links a:hover { color: var(--c-text); text-decoration: underline; text-underline-offset: 3px; }
.beian-links .beian-ico { width: 14px; height: 14px; flex: none; }
.foot__copy { color: var(--c-text-mute); font-size: 13px; }
.foot__note {
  padding: 0 0 26px;
  color: var(--c-text-mute);
  font-size: 12.5px;
  line-height: 1.72;
  max-width: 1000px;
}

/* --------------------------------------------------------------------------
   18. 滚动进入动效
   -------------------------------------------------------------------------- */
/* 滚动进入动效。
   注意前缀 .js：由 <head> 内联脚本在 <html> 上打标。
   没有 JS（被拦截、CSP、离线、老浏览器）时不加该类，元素保持可见——
   否则 .reveal 的 opacity:0 会让整站内容永久不可见，属渐进增强底线。 */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .72s cubic-bezier(.22,.7,.3,1), transform .72s cubic-bezier(.22,.7,.3,1);
  will-change: opacity, transform;
}
.js .reveal.is-in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .07s; }
.reveal-d2 { transition-delay: .14s; }
.reveal-d3 { transition-delay: .21s; }
.reveal-d4 { transition-delay: .28s; }
.reveal-d5 { transition-delay: .35s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal, .reveal { opacity: 1; transform: none; transition: none; }
  .frame img, .card, .btn { transition: none; }
}

/* --------------------------------------------------------------------------
   19. 工具类
   -------------------------------------------------------------------------- */
.mt-1 { margin-top: var(--sp-1); } .mt-2 { margin-top: var(--sp-2); }
.mt-3 { margin-top: var(--sp-3); } .mt-4 { margin-top: var(--sp-4); }
.mt-6 { margin-top: var(--sp-6); } .mt-8 { margin-top: var(--sp-8); }
.dim { color: var(--c-text-dim); }
.center { text-align: center; }
.hide { display: none !important; }

/* --------------------------------------------------------------------------
   20. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1400px) {
  /* 中小桌面：主菜单仍在，仅收紧菜单项内边距，保证 1320px 容器内单行排布有余量 */
  .nav__link { padding: 9px 8px; font-size: 13.5px; }
}

@media (max-width: 1319px) {
  /* 完整主菜单在此宽度以下无法单行容纳，收进抽屉；同时隐藏英文商号 */
  .brand__en { display: none; }
  .nav__menu { display: none; }
  .nav__burger { display: block; }
  .nav__actions { margin-left: auto; }
  .nav__mail span.txt { display: none; }
  .nav__mail { width: 42px; padding: 0; justify-content: center; }
}

@media (max-width: 1180px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .foot__grid { grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr)); }
  .foot__col--contact { grid-column: span 2; }
}

@media (max-width: 1024px) {
  :root { --nav-h: 68px; --sp-16: 96px; --sp-12: 72px; }
  .sec-head--split { grid-template-columns: 1fr; gap: var(--sp-3); align-items: start; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .g2 { grid-template-columns: minmax(0, 1fr); }
  .hero__stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .hero__stat:nth-child(3) { border-right: none; }
  .hero__stat:nth-child(n+4) { border-top: 1px solid var(--c-line); }
  .stat-panel, .stat-panel--3, .stat-panel--5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .client-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr; }
  .cta-band__inner { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow__step:nth-child(2n)::after { display: none; }
  .post { grid-template-columns: 128px minmax(0, 1fr); }
  .post__go { display: none; }
}

@media (max-width: 720px) {
  :root { --sp-16: 72px; --sp-12: 60px; --sp-8: 44px; }
  .wrap { padding: 0 20px; }
  .nav__inner { padding: 0 20px; }
  .brand__cn { font-size: 14.5px; }
  .brand__mark { height: 30px; }
  .grid-2, .grid-3, .grid-4, .grid-5, .grid-6 { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: calc(var(--nav-h) + 54px); }
  .hero__body { padding-bottom: var(--sp-8); }
  .hero__stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__stat { padding: 20px 16px; }
  .hero__stat:nth-child(3) { border-right: 1px solid var(--c-line); }
  .hero__stat:nth-child(2n) { border-right: none; }
  .stat-panel, .stat-panel--3, .stat-panel--5 { grid-template-columns: 1fr; }
  .client-row { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow__step::after { display: none; }
  .page-head { padding: calc(var(--nav-h) + 50px) 0 44px; }
  /* 规格表：窄屏改为卡片式堆叠（thead 隐藏，td 以 data-th 显示字段名），
     避免 560px 宽表在 390px 视口被硬切一列且无滚动提示 */
  .spec-table { border: none; background: none; overflow: visible; }
  .spec-table table,
  .spec-table tbody,
  .spec-table tr,
  .spec-table td { display: block; width: 100%; }
  .spec-table thead { display: none; }
  .spec-table tbody tr {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-card);
    margin-bottom: 12px;
    overflow: hidden;
  }
  .spec-table tbody tr:last-child { margin-bottom: 0; }
  .spec-table tbody tr:hover td { background: transparent; }
  .spec-table tbody td {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px;
    align-items: baseline;
    padding: 12px 16px;
    border-bottom: 1px solid var(--c-line);
    text-align: left;
  }
  .spec-table tbody td:last-child { border-bottom: none; }
  .spec-table tbody td::before {
    content: attr(data-th);
    font-size: 12.5px;
    color: var(--c-text-mute);
  }
  .spec-table tbody td > .tag { justify-self: start; }
  .spec-table .c-num { font-size: 16px; }
  .kv__row { grid-template-columns: 1fr; gap: 5px; }
  .post { grid-template-columns: 1fr; gap: 14px; padding: 18px; }
  .post__thumb { max-width: 260px; }
  .job { grid-template-columns: 1fr; }
  .job__side { text-align: left; justify-items: start; }
  .cta-band { padding: var(--sp-6) var(--sp-3); }
  .foot__grid { grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
  .foot__brand { grid-column: span 2; }
  .foot__col--contact { grid-column: span 2; }
  .foot__beian { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .brand__text { display: none; }
  .hero__cta { gap: 10px; }
  .btn { padding: 0 20px; }
}

/* --------------------------------------------------------------------------
   21. 打印（简化：强制白底黑字，保留备案信息）
   -------------------------------------------------------------------------- */
@media print {
  body { background: #fff; color: #111; }
  .nav, .hero__bg, .hero__grid, .cta-band, .page-head__glow { display: none; }
  .card, .section, .foot { background: #fff; border-color: #ccc; }
  a { color: #111; text-decoration: underline; }
}