/* =========================================================================
   艾克普联 · SmartWeld2 官网样式表（浅色简洁版）
   纯静态站：无构建、无依赖、无外部请求
   目录：1 变量与重置 / 2 布局 / 3 通用组件 / 4 头部与导航 / 5 首屏
        6 页面头 / 7 卡片与区块 / 8 表格与筛选 / 9 CTA 与页脚
        10 动画 / 11 响应式
   ========================================================================= */

/* 1. 变量与重置 ---------------------------------------------------------- */
:root {
  /* 颜色 */
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-soft: #eff4ff;
  --cyan: #0ea5e9;

  --ink: #0f172a;
  --ink-2: #5b6675;
  --ink-3: #6b7280;

  --line: #e8ecf3;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --surface: #ffffff;
  --frame: #0c1424;

  /* 排版 */
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo,
    Consolas, monospace;

  /* 尺寸 */
  --wrap: 1160px;
  --header-h: 68px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 14px 34px -18px rgba(15, 23, 42, 0.28);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -60px;
  z-index: 200;
  transform: translateX(-50%);
  padding: 10px 20px;
  border-radius: 0 0 10px 10px;
  background: var(--brand);
  color: #fff;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

.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;
}

/* 2. 布局 ---------------------------------------------------------------- */
.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section--tight {
  padding: 56px 0;
}

.section--muted {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: 24px;
}

/* 3. 通用组件 ------------------------------------------------------------ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.eyebrow::before {
  content: "";
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.section-head {
  max-width: 720px;
  margin-bottom: 44px;
}

.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head--center .eyebrow {
  justify-content: center;
}

.section-title {
  margin-top: 12px;
  font-size: clamp(24px, 2.8vw, 34px);
}

.section-lead {
  margin-top: 14px;
  font-size: 16.5px;
  color: var(--ink-2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color 0.18s ease, border-color 0.18s ease,
    color 0.18s ease, transform 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--brand);
  color: #fff;
}

.btn--primary:hover {
  background: var(--brand-dark);
}

.btn--outline {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.btn--outline:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #fff;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
}

.link-arrow svg {
  transition: transform 0.18s ease;
}

.link-arrow:hover svg {
  transform: translateX(3px);
}

.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  background: var(--brand-soft);
  color: var(--brand);
}

/* 4. 头部与导航 ---------------------------------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.header.is-scrolled,
.header.is-open {
  border-bottom-color: var(--line);
  box-shadow: 0 6px 22px -20px rgba(15, 23, 42, 0.6);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  flex-shrink: 0;
}

.brand__mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand__sub {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav__link:hover {
  color: var(--brand);
  background: var(--brand-soft);
}

.nav__link[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

.header__cta {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: background-color 0.2s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.22s ease;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* 5. 首屏 ---------------------------------------------------------------- */
.hero {
  padding: calc(var(--header-h) + 60px) 0 56px;
  background: linear-gradient(180deg, #edf2fa, #e3ebf6);
  border-bottom: 1px solid #d8e1ef;
  overflow: hidden;
}

.hero + .section {
  padding-top: 48px;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  align-items: center;
  gap: 56px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13.5px;
  font-weight: 600;
}

.hero__title {
  margin-top: 22px;
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.hero__title em {
  font-style: normal;
  color: var(--brand);
}

.hero__lead {
  margin-top: 18px;
  max-width: 32em;
  font-size: 17px;
  color: var(--ink-2);
}

.hero .btn-row {
  margin-top: 32px;
}

.hero__frame {
  background: var(--frame);
}

.hero__frame img {
  width: 100%;
  height: auto;
}

/* 首屏插图外面套一层“应用窗口”，避免深色插图看起来像空占位 */
.hero__card {
  position: relative;
  z-index: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 16px;
  background: #f5f7fa;
  border-bottom: 1px solid var(--line);
}

.hero__bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #d6dce6;
}

.hero__bar em {
  margin-left: 8px;
  font-style: normal;
  font-size: 12.5px;
  color: var(--ink-3);
}

.hero__media {
  position: relative;
}

.hero__media::before {
  content: "";
  position: absolute;
  z-index: 0;
  right: -16px;
  bottom: -16px;
  width: 62%;
  height: 58%;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12),
      rgba(14, 165, 233, 0.07));
}

/* 6. 页面头 -------------------------------------------------------------- */
.page-head {
  padding: calc(var(--header-h) + 56px) 0 48px;
  background: linear-gradient(180deg, #edf2fa, #e3ebf6);
  border-bottom: 1px solid #d8e1ef;
}

.page-head__inner {
  max-width: 760px;
}

.page-head h1 {
  font-size: clamp(26px, 3.4vw, 40px);
}

.page-head p {
  margin-top: 14px;
  font-size: 16.5px;
  color: var(--ink-2);
}

.crumb {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 13.5px;
  color: var(--ink-3);
}

.crumb a:hover {
  color: var(--brand);
}

/* 7. 卡片与区块 ---------------------------------------------------------- */

/* 能力矩阵 */
.matrix {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.matrix th,
.matrix td {
  padding: 11px 16px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.matrix thead th {
  background: var(--bg-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  white-space: nowrap;
}

.matrix thead th:first-child {
  width: 46px;
  padding-left: 6px;
  padding-right: 6px;
}

.matrix thead th:last-child {
  width: 180px;
}

.matrix thead th:nth-child(2),
.matrix tbody th:not(.matrix__cat) {
  text-align: left;
  white-space: nowrap;
}

.matrix tbody th:not(.matrix__cat) {
  font-weight: 500;
  color: var(--ink);
}

.matrix tbody:last-child tr:last-child th,
.matrix tbody:last-child tr:last-child td {
  border-bottom: 0;
}

.matrix tbody tr:hover td,
.matrix tbody tr:hover th:not(.matrix__cat) {
  background: var(--bg-soft);
}

/* 左侧分类列：竖排文字 + 品牌色块 */
.matrix__cat {
  width: 46px;
  padding: 10px 6px;
  background: var(--brand);
  border-bottom-color: rgba(255, 255, 255, 0.28);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-align: center;
  writing-mode: vertical-rl;
}

/* 勾选 / 短横 / 文字三种标记 */
.matrix__yes::before,
.matrix__no::before {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
}

.matrix__yes::before {
  content: "✓";
  color: var(--brand);
}

.matrix__no::before {
  content: "—";
  font-weight: 400;
  color: #c9d1de;
}

.matrix__text {
  font-size: 13px;
  color: var(--ink-2);
}

.matrix__legend {
  margin-top: 14px;
  font-size: 13px;
  color: var(--ink-3);
}

/* 通用小卡（软件功能 / 联系页） */
.option-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.option {
  display: flex;
  flex-direction: column;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.option:hover {
  transform: translateY(-4px);
  border-color: #dbe4f7;
  box-shadow: var(--shadow);
}

.option__icon {
  width: 34px;
  height: 34px;
  color: var(--brand);
}

.option__model {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.07em;
  color: var(--brand);
}

.option h3 {
  margin-top: 14px;
  font-size: 16.5px;
}

.option p {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--ink-2);
}

.option .link-arrow {
  margin-top: 16px;
}

/* 硬件产品卡 */
.prod-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.prod-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.prod-card:hover {
  transform: translateY(-4px);
  border-color: #dbe4f7;
  box-shadow: var(--shadow);
}

.prod-card__media {
  aspect-ratio: 4 / 3;
  background: var(--frame);
  overflow: hidden;
}

.prod-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.prod-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 22px 24px 24px;
}

.prod-card__model {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.07em;
  color: var(--brand);
}

.prod-card h3 {
  margin-top: 8px;
  font-size: 18px;
}

.prod-card p {
  margin-top: 10px;
  font-size: 14.5px;
  color: var(--ink-2);
}

.prod-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.prod-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-2);
}

.prod-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.prod-card__foot {
  margin-top: auto;
  padding-top: 18px;
}

/* 适用行业（单行紧凑条，用 1px 间隙做分隔线） */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.industry {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px 10px;
  background: var(--surface);
  text-align: center;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.industry:hover {
  background: var(--brand-soft);
  color: var(--brand);
}

.industry__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--brand);
}

.industry h3 {
  font-size: 14.5px;
}

/* 应用场景卡 */
.case-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.case-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.case {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.case:hover {
  transform: translateY(-4px);
  border-color: #dbe4f7;
  box-shadow: var(--shadow);
}

.case[hidden] {
  display: none;
}

.case__media {
  aspect-ratio: 16 / 9;
  background: var(--frame);
  overflow: hidden;
}

.case__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case__body {
  padding: 22px 24px 24px;
}

.case__body h3 {
  margin-top: 12px;
  font-size: 18px;
}

.case__body > p {
  margin-top: 10px;
  font-size: 14.5px;
  color: var(--ink-2);
}

.case__data {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.case__data b {
  display: block;
  font-size: 16px;
  color: var(--brand);
}

.case__data span {
  display: block;
  margin-top: 2px;
  font-size: 12.5px;
  color: var(--ink-3);
}

/* 联系我们卡片 */
.contact-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-card {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.contact-card__icon {
  width: 36px;
  height: 36px;
  color: var(--brand);
}

.contact-card h3 {
  margin-top: 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
}

.contact-card b {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: 0.02em;
}

.contact-card small {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-3);
}

.map {
  position: relative;
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--frame);
}

.map img {
  width: 100%;
  height: auto;
}

.map__note {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  font-size: 13px;
  box-shadow: var(--shadow-sm);
}

/* 服务流程 */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  counter-reset: flow;
}

.step {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.step::before {
  counter-increment: flow;
  content: "0" counter(flow);
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--brand);
}

.step h3 {
  margin-top: 12px;
  font-size: 16.5px;
}

.step p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-2);
}

/* 8. 表格与筛选 ---------------------------------------------------------- */
.table-scroll {
  overflow-x: auto;
}

.filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.filter__btn {
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 14px;
  color: var(--ink-2);
  transition: color 0.18s ease, border-color 0.18s ease,
    background-color 0.18s ease;
}

.filter__btn:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.filter__btn[aria-pressed="true"] {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

/* 9. CTA 与页脚 ---------------------------------------------------------- */
.cta {
  padding: 72px 0;
  background: var(--brand);
  color: #fff;
  text-align: center;
}

.cta h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.cta p {
  max-width: 44em;
  margin: 16px auto 0;
  color: rgba(255, 255, 255, 0.85);
}

.cta .btn-row {
  justify-content: center;
  margin-top: 30px;
}

.cta .btn--primary {
  background: #fff;
  color: var(--brand);
}

.cta .btn--primary:hover {
  background: #eef3ff;
}

.footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 14px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 40px;
  padding: 56px 0 40px;
}

.footer .brand {
  margin-bottom: 16px;
}

.footer__desc {
  max-width: 28em;
  color: var(--ink-2);
}

.footer h4 {
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--ink);
}

.footer li + li {
  margin-top: 9px;
}

.footer a:hover {
  color: var(--brand);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-3);
}

/* 10. 动画 --------------------------------------------------------------- */
/* 仅在 JS 可用时才隐藏待入场元素，避免脚本失败导致内容不可见 */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  will-change: opacity, transform;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: 0.08s;
}

.reveal-delay-2 {
  transition-delay: 0.16s;
}

.reveal-delay-3 {
  transition-delay: 0.24s;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* 11. 响应式 ------------------------------------------------------------- */
@media (max-width: 1080px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero__media {
    max-width: 640px;
  }

  .option-grid,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .prod-grid,
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-grid,
  .case-grid--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .industry-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header__cta {
    display: none;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 20px 20px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  }

  .nav.is-open {
    opacity: 1;
    transform: none;
    visibility: visible;
  }

  .nav__link {
    padding: 13px 16px;
    font-size: 16px;
  }

  .section {
    padding: 64px 0;
  }

  .section--tight {
    padding: 52px 0;
  }

  .section-head {
    margin-bottom: 34px;
  }

  .btn {
    width: 100%;
  }

  .btn-row {
    flex-direction: column;
  }

  .matrix th,
  .matrix td {
    padding: 12px 14px;
    font-size: 13.5px;
  }
}

@media (max-width: 620px) {
  .hero {
    padding-top: calc(var(--header-h) + 48px);
  }

  .option-grid,
  .prod-grid,
  .contact-grid,
  .case-grid,
  .case-grid--two,
  .steps {
    grid-template-columns: 1fr;
  }

  .industry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}