/* =========================================================
   深圳市智云创科科技有限公司 — 官网样式表
   目录：
   1. 设计变量与设计基础（Reset / 版式）
   2. 通用工具类与组件（按钮、卡片、章节标题）
   3. 顶部信息条与导航栏
   4. 首页：Hero / 服务 / 关于 / 流程 / 数据 / 行业 / 新闻 / CTA
   5. 内页：关于我们、服务范围、联系我们
   6. 页脚与返回顶部
   7. 响应式断点（1200 / 992 / 768 / 576）
   ========================================================= */

/* ---------- 1. 设计变量与设计基础 ---------- */
:root {
  /* 品牌色 */
  --brand-600: #0a3fb8;
  --brand-500: #1668ff;
  --brand-400: #4a8dff;
  --cyan-500: #00b8e6;
  --brand-gradient: linear-gradient(135deg, #1668ff 0%, #00b8e6 100%);
  --brand-gradient-soft: linear-gradient(135deg, rgba(22, 104, 255, 0.10) 0%, rgba(0, 184, 230, 0.10) 100%);

  /* 中性色 */
  --ink-900: #10192b;
  --ink-700: #2b3a55;
  --ink-500: #5c6b85;
  --ink-300: #8b98ad;
  --line: #e2e9f6;
  --bg: #ffffff;
  --bg-soft: #f5f8ff;
  --bg-deep: #0d1424;

  /* 尺寸 */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --container: 1200px;
  --header-h: 72px;
  --shadow-sm: 0 2px 10px rgba(16, 25, 43, 0.06);
  --shadow: 0 10px 30px rgba(16, 25, 43, 0.08);
  --shadow-lg: 0 20px 50px rgba(16, 25, 43, 0.14);

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  /* 锚点跳转时给固定头部留出空间 */
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink-900);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

img, svg { display: block; max-width: 100%; height: auto; }

/* 键盘可访问性：保留可见焦点样式 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--brand-400);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 2. 通用工具类与组件 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section--soft {
  background: var(--bg-soft);
}

.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head .eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--brand-gradient-soft);
  color: var(--brand-600);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
}

.section-head p {
  margin-top: 16px;
  color: var(--ink-500);
  font-size: 17px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 10px 24px rgba(22, 104, 255, 0.28);
}

.btn--primary:hover { box-shadow: 0 16px 34px rgba(22, 104, 255, 0.36); }

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

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

.btn--outline {
  background: #fff;
  border-color: var(--line);
  color: var(--brand-600);
}

.btn--outline:hover {
  border-color: var(--brand-500);
  box-shadow: var(--shadow-sm);
}

.btn--lg { padding: 16px 36px; font-size: 16px; }

/* 滚动揭示动画 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

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

/* ---------- 3. 顶部信息条与导航栏 ---------- */
.topbar {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
}

.topbar__list {
  display: flex;
  align-items: center;
  gap: 22px;
}

.topbar__list a:hover { color: #fff; }

.topbar__list svg {
  width: 14px;
  height: 14px;
  margin-right: 6px;
  vertical-align: -2px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

.header.is-stuck {
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--brand-gradient);
  box-shadow: 0 8px 18px rgba(22, 104, 255, 0.3);
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.03em;
}

.logo__text strong {
  display: block;
  color: var(--ink-900);
  font-size: 17px;
  letter-spacing: 0.01em;
}

.logo__text span {
  display: block;
  color: var(--ink-300);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link {
  position: relative;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--ink-700);
  font-size: 15px;
  font-weight: 500;
}

.nav__link:hover { color: var(--brand-600); }

.nav__link.is-active { color: var(--brand-600); }

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-gradient);
}

.header__cta { display: flex; align-items: center; gap: 12px; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: var(--ink-900);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 4. 首页 ---------- */
/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 0 120px;
  background:
    radial-gradient(900px 460px at 88% -10%, rgba(0, 184, 230, 0.22), transparent 60%),
    radial-gradient(760px 420px at 8% 20%, rgba(22, 104, 255, 0.16), transparent 62%),
    var(--bg-soft);
}

.hero::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -180px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: var(--brand-gradient);
  opacity: 0.08;
}

.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid rgba(22, 104, 255, 0.25);
  border-radius: 999px;
  background: #fff;
  color: var(--brand-600);
  font-size: 13px;
  font-weight: 600;
}

.hero__badge i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #17c964;
  box-shadow: 0 0 0 4px rgba(23, 201, 100, 0.18);
}

.hero h1 {
  margin-top: 22px;
  font-size: clamp(32px, 5.2vw, 54px);
}

.hero h1 em {
  font-style: normal;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  margin-top: 20px;
  max-width: 560px;
  color: var(--ink-500);
  font-size: 18px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.hero__stats div strong {
  display: block;
  color: var(--ink-900);
  font-size: 30px;
  line-height: 1.2;
}

.hero__stats div span {
  color: var(--ink-500);
  font-size: 14px;
}

/* Hero 视觉卡片 */
.hero__visual {
  position: relative;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-lg);
}

.hero__window {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero__window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

.hero__window-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d7dfee;
}

.hero__window-bar i:first-child { background: #ff6058; }
.hero__window-bar i:nth-child(2) { background: #ffbd2e; }
.hero__window-bar i:nth-child(3) { background: #28c93f; }

.hero__code {
  margin: 0;
  padding: 18px;
  background: #0f1830;
  color: #cfe0ff;
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.9;
  overflow-x: auto;
}

.hero__code .c-key { color: #7fb2ff; }
.hero__code .c-str { color: #7ee0c0; }
.hero__code .c-com { color: #6b7a99; }

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.hero__chips span {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--ink-700);
  font-size: 13px;
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-900);
}

.float-card--a { left: -34px; top: 24%; }
.float-card--b { right: -26px; bottom: 12%; }

.float-card i {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--brand-gradient-soft);
  color: var(--brand-600);
}

/* 服务卡片 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.service-card {
  position: relative;
  overflow: hidden;
  padding: 34px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.service-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(22, 104, 255, 0.3);
  box-shadow: var(--shadow);
}

.service-card:hover::before { transform: scaleX(1); }

.service-card__icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--brand-gradient-soft);
  color: var(--brand-600);
}

.service-card__icon svg { width: 26px; height: 26px; }

.service-card h3 {
  margin: 20px 0 10px;
  font-size: 19px;
}

.service-card p {
  color: var(--ink-500);
  font-size: 15px;
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.service-card__tags span {
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--ink-500);
  font-size: 12px;
}

/* 关于 */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.about-tile {
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.about-tile--brand {
  background: var(--brand-gradient);
  border-color: transparent;
  color: #fff;
}

.about-tile--brand strong { color: #fff; font-size: 34px; }

.about-tile strong {
  display: block;
  color: var(--ink-900);
  font-size: 26px;
  line-height: 1.3;
}

.about-tile span {
  display: block;
  margin-top: 6px;
  color: var(--ink-500);
  font-size: 13px;
}

.about-tile--brand span { color: rgba(255, 255, 255, 0.85); }

.feature-list {
  display: grid;
  gap: 18px;
  margin: 28px 0 34px;
}

.feature-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.feature-list svg {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  color: var(--brand-500);
}

.feature-list h4 { font-size: 16px; }

.feature-list p {
  margin-top: 2px;
  color: var(--ink-500);
  font-size: 14px;
}

/* 服务流程 */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 30px 22px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  text-align: center;
}

.step__num {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.step h4 { font-size: 16px; }

.step p {
  margin-top: 8px;
  color: var(--ink-500);
  font-size: 14px;
}

/* 数据条 */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 44px 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(22, 104, 255, 0.9), rgba(0, 184, 230, 0.9));
  overflow: hidden;
  color: #fff;
}

.metrics div { padding: 8px 24px; text-align: center; }

.metrics strong {
  display: block;
  font-size: 38px;
  line-height: 1.2;
}

.metrics span {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
}

/* 行业应用 */
.industries {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.industry {
  position: relative;
  overflow: hidden;
  min-height: 190px;
  padding: 30px;
  border-radius: var(--radius);
  background: var(--bg-deep);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.industry::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--brand-gradient);
  opacity: 0.55;
  transition: opacity 0.35s var(--ease);
}

.industry:hover::before { opacity: 0.78; }

.industry > * { position: relative; }

.industry h3 { color: #fff; font-size: 20px; }

.industry p {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
}

.industry__tag {
  align-self: flex-start;
  margin-bottom: auto;
  padding: 4px 12px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  font-size: 12px;
}

/* 新闻 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.news-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.news-card__thumb {
  height: 150px;
  background: var(--brand-gradient);
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.92);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.news-card__body { padding: 24px; }

.news-card time {
  color: var(--brand-600);
  font-size: 13px;
  font-weight: 600;
}

.news-card h3 {
  margin: 10px 0 10px;
  font-size: 17px;
  line-height: 1.5;
}

.news-card p {
  color: var(--ink-500);
  font-size: 14px;
}

/* CTA */
.cta {
  position: relative;
  overflow: hidden;
  padding: 76px 0;
  background: var(--bg-deep);
  color: #fff;
  text-align: center;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(700px 320px at 50% 0%, rgba(22, 104, 255, 0.45), transparent 70%);
}

.cta > .container { position: relative; }

.cta h2 {
  color: #fff;
  font-size: clamp(26px, 3.6vw, 38px);
}

.cta p {
  max-width: 620px;
  margin: 16px auto 32px;
  color: rgba(255, 255, 255, 0.78);
}

.cta__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 5. 内页 ---------- */
/* 页头横幅 */
.page-banner {
  position: relative;
  overflow: hidden;
  padding: 76px 0 72px;
  background: var(--bg-soft);
  text-align: center;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(800px 360px at 50% -20%, rgba(22, 104, 255, 0.18), transparent 70%);
}

.page-banner > .container { position: relative; }

.page-banner h1 { font-size: clamp(28px, 4.4vw, 44px); }

.page-banner p {
  max-width: 660px;
  margin: 14px auto 0;
  color: var(--ink-500);
  font-size: 17px;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--ink-300);
  font-size: 13px;
}

.breadcrumb a:hover { color: var(--brand-600); }

/* 关于页 */
.prose-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: start;
}

.prose h2 { font-size: 28px; }

.prose h3 {
  margin: 34px 0 12px;
  font-size: 20px;
}

.prose p {
  margin-top: 14px;
  color: var(--ink-500);
  font-size: 16px;
}

.prose ul.tick { margin-top: 16px; display: grid; gap: 12px; }

.prose ul.tick li {
  display: flex;
  gap: 12px;
  color: var(--ink-500);
}

.prose ul.tick svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  color: var(--brand-500);
}

.info-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.info-card dl { margin: 0; }

.info-card dt {
  color: var(--ink-300);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.info-card dd {
  margin: 4px 0 18px;
  color: var(--ink-900);
  font-size: 15px;
  font-weight: 600;
}

.info-card dd:last-child { margin-bottom: 0; }

.timeline { display: grid; gap: 26px; margin-top: 8px; }

.timeline li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 22px;
  padding-bottom: 26px;
  border-bottom: 1px dashed var(--line);
}

.timeline li:last-child { border-bottom: 0; padding-bottom: 0; }

.timeline b {
  color: var(--brand-600);
  font-size: 15px;
}

.timeline h4 { font-size: 17px; }

.timeline p {
  margin-top: 6px;
  color: var(--ink-500);
  font-size: 15px;
}

/* 服务页 */
.service-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.service-panel {
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.service-panel:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.service-panel__ico {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--brand-gradient);
  color: #fff;
}

.service-panel__ico svg { width: 28px; height: 28px; }

.service-panel h3 { margin: 22px 0 12px; font-size: 20px; }

.service-panel > p {
  color: var(--ink-500);
  font-size: 15px;
}

.service-panel ul {
  display: grid;
  gap: 10px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.service-panel ul li {
  display: flex;
  gap: 10px;
  color: var(--ink-500);
  font-size: 14px;
}

.service-panel ul li::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--cyan-500);
}

/* 联系方式 + 表单 */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-card {
  display: flex;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.contact-card + .contact-card { margin-top: 16px; }

.contact-card i {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand-gradient-soft);
  color: var(--brand-600);
}

.contact-card i svg { width: 22px; height: 22px; }

.contact-card strong {
  display: block;
  color: var(--ink-900);
  font-size: 15px;
}

.contact-card span,
.contact-card a {
  display: block;
  margin-top: 2px;
  color: var(--ink-500);
  font-size: 14px;
}

.contact-card a:hover { color: var(--brand-600); }

.form {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field { margin-bottom: 18px; }

.field label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 600;
}

.field label span { color: #e5484d; }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--ink-900);
  font-family: inherit;
  font-size: 15px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
}

.field textarea { min-height: 120px; resize: vertical; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 4px rgba(22, 104, 255, 0.12);
}

.field input[aria-invalid="true"],
.field textarea[aria-invalid="true"] { border-color: #e5484d; }

.field__error {
  display: block;
  margin-top: 6px;
  min-height: 18px;
  color: #e5484d;
  font-size: 13px;
}

.form__note {
  margin-top: 14px;
  color: var(--ink-300);
  font-size: 13px;
}

.form__success {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid rgba(23, 201, 100, 0.35);
  border-radius: 10px;
  background: rgba(23, 201, 100, 0.08);
  color: #12864a;
  font-size: 14px;
}

.form__success.is-show { display: block; }

.map-placeholder {
  display: grid;
  place-items: center;
  height: 260px;
  margin-top: 16px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--ink-300);
  font-size: 14px;
  text-align: center;
}

/* ---------- 6. 页脚与返回顶部 ---------- */
.footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding: 66px 0 44px;
}

.footer .logo__text strong { color: #fff; }
.footer .logo__mark { box-shadow: none; }
.footer .logo__text span { color: rgba(255, 255, 255, 0.5); }

.footer__about {
  margin-top: 18px;
  max-width: 320px;
  line-height: 1.85;
}

.footer h4 {
  margin-bottom: 18px;
  color: #fff;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.footer li + li { margin-top: 10px; }

.footer li a:hover { color: #fff; }

.footer__contact li {
  display: flex;
  gap: 10px;
  line-height: 1.7;
}

.footer__contact svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  color: var(--cyan-500);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

.footer__bottom a:hover { color: #fff; }

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 55;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: #fff;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  box-shadow: var(--shadow);
}

.to-top.is-show { opacity: 1; visibility: visible; transform: none; }

.to-top svg { width: 20px; height: 20px; }

/* ---------- 7. 响应式断点 ---------- */
@media (max-width: 1200px) {
  .services-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .float-card--a { left: -10px; }
  .float-card--b { right: -10px; }
}

@media (max-width: 992px) {
  .section { padding: 72px 0; }

  .nav-toggle { display: block; }

  .header__cta .btn { display: none; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 59;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100dvh - var(--header-h));
    padding: 12px 24px 24px;
    overflow-y: auto;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s;
  }

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

  .nav__link {
    padding: 14px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .nav__link.is-active::after { display: none; }

  .hero { padding: 72px 0 84px; }

  .hero__grid { grid-template-columns: 1fr; gap: 48px; }

  .hero__visual { order: -1; max-width: 560px; }

  .float-card { display: none; }

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

  .about-grid,
  .prose-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

  .industries,
  .news-grid,
  .service-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

  .footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
}

@media (max-width: 768px) {
  .topbar { font-size: 12px; }

  .topbar__list { gap: 14px; }

  .container { padding: 0 18px; }

  .section { padding: 60px 0; }

  .section-head { margin-bottom: 38px; }

  .hero__stats { gap: 24px 32px; }

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

  .timeline li { grid-template-columns: 1fr; gap: 8px; }

  .form { padding: 26px 22px; }

  .footer__bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 576px) {
  body { font-size: 15px; }

  .logo__text span { display: none; }

  .hero__actions .btn,
  .cta__actions .btn { width: 100%; }

  .services-grid,
  .industries,
  .news-grid,
  .service-row { grid-template-columns: 1fr; }

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

  .metrics strong { font-size: 32px; }

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

  .about-visual { grid-template-columns: 1fr; }

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

  .to-top { right: 14px; bottom: 14px; }
}