/* ==========================================================================
   东信智能官网 · 全站共享样式（浅色科技风 Light Tech Theme）
   主色：科技蓝 #1677ff / 青色 #00d4ff；底色：#f7f9fc / #ffffff / #eef3f9
   ========================================================================== */

:root {
  --bg: #f7f9fc;
  --bg-soft: #eef3f9;
  --surface: #ffffff;
  --border: #e2e9f3;
  --border-strong: #cdd9e8;
  --text: #1a2332;
  --text-2: #47566b;
  --text-3: #7c8ba1;
  --primary: #1677ff;
  --primary-deep: #0958d9;
  --cyan: #00d4ff;
  --grad: linear-gradient(135deg, #1677ff 0%, #00d4ff 100%);
  --grad-soft: linear-gradient(135deg, rgba(22, 119, 255, .08), rgba(0, 212, 255, .08));
  --shadow-sm: 0 2px 10px rgba(23, 58, 112, .06);
  --shadow-md: 0 8px 26px rgba(23, 58, 112, .10);
  --shadow-lg: 0 18px 44px rgba(23, 58, 112, .14);
  --radius: 14px;
  --radius-sm: 10px;
  --header-h: 72px;
  --font: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  vertical-align: middle;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .25s ease;
}

a:hover {
  color: var(--primary-deep);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.grad-line {
  width: 64px;
  height: 4px;
  border-radius: 2px;
  background: var(--grad);
  margin: 18px auto 0;
}

.section {
  padding: 88px 0;
}

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

.section-head {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px;
}

.section-head.left {
  text-align: left;
  margin-left: 0;
}

.section-head.left .grad-line {
  margin-left: 0;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--grad-soft);
  border: 1px solid rgba(22, 119, 255, .18);
  border-radius: 999px;
  padding: 5px 16px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.section-desc {
  margin-top: 14px;
  color: var(--text-2);
  font-size: 16px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 22px rgba(22, 119, 255, .28);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(22, 119, 255, .38);
}

.btn-ghost {
  background: rgba(255, 255, 255, .7);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 22px;
  font-size: 14px;
}

.btn-lg {
  padding: 15px 38px;
  font-size: 16px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  flex-shrink: 0;
}

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

.brand-icon {
  display: block;
  width: 34px;
  height: auto;
  border-radius: 6px;
  object-fit: contain;
}

.footer-brand .brand-icon {
  width: 28px;
}

.brand-name {
  font-size: 21px;
  letter-spacing: 1px;
}

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

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  color: var(--text-2);
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s ease;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-cta {
  margin-left: 10px;
}

/* 当前栏目高亮（由 body[data-page] 驱动） */
body[data-page="home"] .nav-link[data-nav="home"],
body[data-page="products"] .nav-link[data-nav="products"],
body[data-page="solutions"] .nav-link[data-nav="solutions"],
body[data-page="cases"] .nav-link[data-nav="cases"],
body[data-page="news"] .nav-link[data-nav="news"],
body[data-page="about"] .nav-link[data-nav="about"] {
  color: var(--primary);
  font-weight: 600;
}

body[data-page="home"] .nav-link[data-nav="home"]::after,
body[data-page="products"] .nav-link[data-nav="products"]::after,
body[data-page="solutions"] .nav-link[data-nav="solutions"]::after,
body[data-page="cases"] .nav-link[data-nav="cases"]::after,
body[data-page="news"] .nav-link[data-nav="news"]::after,
body[data-page="about"] .nav-link[data-nav="about"]::after {
  transform: scaleX(1);
}

/* 汉堡按钮 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 1px;
  background: var(--text);
  transition: transform .3s ease, opacity .3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 460px at 82% -10%, rgba(0, 212, 255, .16), transparent 60%),
    radial-gradient(1000px 520px at 12% 0%, rgba(22, 119, 255, .14), transparent 62%),
    linear-gradient(180deg, #f2f7fd 0%, #f7f9fc 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22, 119, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 119, 255, .055) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 20%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 20%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .55;
  pointer-events: none;
}

.hero-blob.blob-a {
  width: 380px;
  height: 380px;
  left: -120px;
  top: -80px;
  background: radial-gradient(circle, rgba(22, 119, 255, .30), transparent 70%);
}

.hero-blob.blob-b {
  width: 420px;
  height: 420px;
  right: -140px;
  bottom: -160px;
  background: radial-gradient(circle, rgba(0, 212, 255, .30), transparent 70%);
}

.hero-ring {
  position: absolute;
  right: 6%;
  top: 16%;
  width: 300px;
  height: 300px;
  border: 1.5px solid rgba(22, 119, 255, .18);
  border-radius: 50%;
  pointer-events: none;
}

.hero-ring::before {
  content: "";
  position: absolute;
  inset: 38px;
  border: 1.5px dashed rgba(0, 212, 255, .30);
  border-radius: 50%;
}

.hero-ring::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(22, 119, 255, .55);
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 24px 110px;
  max-width: 920px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-deep);
  background: rgba(255, 255, 255, .85);
  border: 1px solid rgba(22, 119, 255, .22);
  border-radius: 999px;
  padding: 7px 18px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}

.hero-eyebrow .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 8px rgba(22, 119, 255, .6);
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
}

.hero-sub {
  margin: 24px auto 0;
  max-width: 700px;
  font-size: 18px;
  color: var(--text-2);
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* ---------- 核心数据条 ---------- */
.data-strip {
  position: relative;
  z-index: 2;
  margin-top: -56px;
}

.data-strip-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}

.stat {
  padding: 34px 20px 30px;
  text-align: center;
  position: relative;
}

.stat + .stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22%;
  bottom: 22%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--border-strong), transparent);
}

.stat-num {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  margin-top: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.stat-sub {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(22, 119, 255, .35);
}

.card-top {
  border-top: 3px solid transparent;
  border-image: var(--grad) 1 / stretch;
  border-image-slice: 0 0 0 0;
}

/* 顶部渐变描边（卡片上缘） */
.card::before {
  content: "";
  position: absolute;
  left: 28px;
  right: 28px;
  top: 0;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--grad);
  opacity: 0;
  transition: opacity .3s ease;
}

.card:hover::before {
  opacity: 1;
}

.icon-badge {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  background: var(--grad-soft);
  border: 1px solid rgba(22, 119, 255, .18);
  margin-bottom: 20px;
  flex-shrink: 0;
}

.icon-badge svg {
  width: 26px;
  height: 26px;
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 15px;
  color: var(--text-2);
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.chip {
  display: inline-block;
  font-size: 13px;
  color: var(--text-2);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  line-height: 1.5;
}

.chip-accent {
  color: var(--primary-deep);
  background: var(--grad-soft);
  border-color: rgba(22, 119, 255, .22);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.card-link:hover {
  gap: 10px;
}

.card-link .arrow {
  transition: transform .25s ease;
}

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

/* 指标 */
.card-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.metric {
  flex: 1 1 120px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  text-align: center;
}

.metric-value {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.2;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-label {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.metric-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* ---------- 行业标签 / 入口卡片 ---------- */
.industry-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-deep);
  background: var(--grad-soft);
  border: 1px solid rgba(22, 119, 255, .2);
  border-radius: 999px;
  padding: 3px 14px;
  margin-bottom: 14px;
}

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.spec-table caption {
  caption-side: top;
  text-align: left;
  padding: 20px 24px 0;
  font-size: 18px;
  font-weight: 700;
}

.spec-table th,
.spec-table td {
  padding: 16px 20px;
  text-align: left;
  vertical-align: top;
  font-size: 14.5px;
  line-height: 1.7;
  border-bottom: 1px solid var(--border);
}

.spec-table thead th {
  background: linear-gradient(180deg, #f4f8fd, #eef4fb);
  color: var(--text);
  font-weight: 700;
  white-space: nowrap;
}

.spec-table tbody th {
  color: var(--text);
  font-weight: 700;
  white-space: nowrap;
}

.spec-table tbody tr:last-child th,
.spec-table tbody tr:last-child td {
  border-bottom: none;
}

.spec-table tbody tr:hover {
  background: #f8fbff;
}

.spec-table td {
  color: var(--text-2);
}

/* ---------- 提示框 ---------- */
.callout {
  margin-top: 24px;
  background: linear-gradient(135deg, rgba(22, 119, 255, .06), rgba(0, 212, 255, .06));
  border: 1px solid rgba(22, 119, 255, .2);
  border-radius: var(--radius);
  padding: 22px 26px;
}

.callout-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-deep);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout p,
.callout li {
  font-size: 14.5px;
  color: var(--text-2);
}

.callout ul {
  list-style: none;
  margin-top: 6px;
}

.callout ul li {
  padding-left: 18px;
  position: relative;
  margin-top: 4px;
}

.callout ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad);
}

/* ---------- 列表（痛点 / 方案） ---------- */
.feature-list {
  display: grid;
  gap: 12px;
}

.feature-list li {
  position: relative;
  padding: 14px 16px 14px 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text-2);
  box-shadow: var(--shadow-sm);
}

.feature-list li strong {
  color: var(--text);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 20px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 0 4px rgba(22, 119, 255, .12);
}

.feature-list.pain li::before {
  background: linear-gradient(135deg, #ff7a45, #ffa940);
  box-shadow: 0 0 0 4px rgba(255, 122, 69, .14);
}

/* ---------- 流程步骤 ---------- */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}

.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  counter-increment: step;
}

.step::before {
  content: "0" counter(step);
  display: block;
  font-size: 26px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.step-title {
  margin-top: 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.step-desc {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- 页面横幅（内页 Hero） ---------- */
.page-banner {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(700px 340px at 85% -20%, rgba(0, 212, 255, .16), transparent 60%),
    radial-gradient(760px 380px at 8% 0%, rgba(22, 119, 255, .13), transparent 62%),
    linear-gradient(180deg, #f2f7fd 0%, #f7f9fc 100%);
  border-bottom: 1px solid var(--border);
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22, 119, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 119, 255, .05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 85% 90% at 50% 0%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 85% 90% at 50% 0%, #000 25%, transparent 78%);
  pointer-events: none;
}

.page-banner-inner {
  position: relative;
  z-index: 1;
  padding: 72px 24px 64px;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 14px;
  color: var(--text-3);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--text-3);
}

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

.page-banner-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 1px;
}

.page-banner-desc {
  margin-top: 16px;
  font-size: 16.5px;
  color: var(--text-2);
}

/* ---------- 子导航（页内锚点） ---------- */
.sub-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 900;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.sub-nav-inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 24px;
  scrollbar-width: none;
}

.sub-nav-inner::-webkit-scrollbar {
  display: none;
}

.sub-nav a {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  transition: all .25s ease;
}

.sub-nav a:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ---------- 方案区块 ---------- */
.solution-block {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}

.solution-block:last-of-type {
  border-bottom: none;
}

.solution-block:nth-of-type(even) {
  background: var(--bg-soft);
}

.solution-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 12px;
}

.solution-index {
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: .9;
}

.solution-title {
  font-size: 28px;
  font-weight: 700;
}

.solution-sub {
  color: var(--text-3);
  font-size: 14px;
  margin-top: 4px;
}

.block-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin: 26px 0 14px;
}

.block-label::before {
  content: "";
  width: 5px;
  height: 18px;
  border-radius: 3px;
  background: var(--grad);
}

/* ---------- 案例卡片 ---------- */
.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 0;
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  scroll-margin-top: calc(var(--header-h) + 60px);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(22, 119, 255, .35);
}

.case-bar {
  height: 4px;
  background: var(--grad);
}

.case-body {
  padding: 28px 30px 30px;
}

.case-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.case-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
}

.case-scheme {
  margin-top: 4px;
  font-size: 14px;
  color: var(--primary-deep);
  font-weight: 600;
}

.case-desc {
  margin-top: 12px;
  font-size: 15px;
  color: var(--text-2);
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
}

.case-metrics .metric {
  padding: 10px 8px;
}

.case-metrics .metric-value {
  font-size: 19px;
}

.case-metrics .metric-label {
  font-size: 12px;
}

/* 案例分组标题 */
.group-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 64px 0 26px;
}

.group-head:first-child {
  margin-top: 0;
}

.group-head h2 {
  font-size: 24px;
  font-weight: 700;
}

.group-head .grad-bar {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

/* ---------- 资质荣誉 ---------- */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.honor-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 18px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.honor-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(22, 119, 255, .35);
}

.honor-item svg {
  flex-shrink: 0;
  color: var(--primary);
}

.honor-item .honor-note {
  display: block;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--text-3);
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 36px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--cyan), rgba(0, 212, 255, .15));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  padding: 0 0 34px 24px;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 5px rgba(22, 119, 255, .12);
}

.timeline-time {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-deep);
  background: var(--grad-soft);
  border: 1px solid rgba(22, 119, 255, .2);
  border-radius: 999px;
  padding: 2px 14px;
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.timeline-body {
  margin-top: 6px;
  font-size: 15px;
  color: var(--text-2);
}

.timeline-body ul li {
  position: relative;
  padding-left: 18px;
  margin-top: 4px;
}

.timeline-body ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad);
}

/* ---------- 战略 / 服务体系 ---------- */
.strategy-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 30px 28px;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(22, 119, 255, .35);
}

.service-card .card-desc ul li {
  position: relative;
  padding-left: 18px;
  margin-top: 6px;
  font-size: 14.5px;
}

.service-card .card-desc ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad);
}

.service-card .card-desc ul li strong {
  color: var(--text);
}

/* ---------- CTA ---------- */
.cta-panel {
  position: relative;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(135deg, rgba(22, 119, 255, .08), rgba(0, 212, 255, .08)), var(--surface);
  border: 1px solid rgba(22, 119, 255, .22);
  border-radius: 20px;
  padding: 64px 32px;
  box-shadow: var(--shadow-md);
}

.cta-panel::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  left: -110px;
  top: -110px;
  background: radial-gradient(circle, rgba(22, 119, 255, .18), transparent 70%);
  pointer-events: none;
}

.cta-panel::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  right: -120px;
  bottom: -140px;
  background: radial-gradient(circle, rgba(0, 212, 255, .18), transparent 70%);
  pointer-events: none;
}

.cta-title {
  position: relative;
  z-index: 1;
  font-size: 32px;
  font-weight: 800;
}

.cta-desc {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  font-size: 16.5px;
  color: var(--text-2);
}

.cta-actions {
  position: relative;
  z-index: 1;
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* ---------- 新闻列表 ---------- */
.news-list {
  display: grid;
  gap: 22px;
}

.news-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow .3s ease, border-color .3s ease;
  scroll-margin-top: calc(var(--header-h) + 60px);
}

.news-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(22, 119, 255, .3);
}

.news-item summary {
  list-style: none;
  cursor: pointer;
  padding: 26px 30px;
  display: flex;
  align-items: flex-start;
  gap: 18px;
  transition: background .25s ease;
}

.news-item summary::-webkit-details-marker {
  display: none;
}

.news-item summary:hover {
  background: #f8fbff;
}

.news-date-box {
  flex-shrink: 0;
  width: 74px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  padding: 10px 6px;
}

.news-date-box .d {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.news-date-box .m {
  font-size: 12px;
  color: var(--text-3);
}

.news-main {
  flex: 1;
  min-width: 0;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.news-tag {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--primary-deep);
  background: var(--grad-soft);
  border: 1px solid rgba(22, 119, 255, .22);
  border-radius: 999px;
  padding: 2px 12px;
}

.news-tag.demo {
  color: #ad6800;
  background: rgba(250, 173, 20, .12);
  border-color: rgba(250, 173, 20, .35);
}

.news-title {
  margin-top: 8px;
  font-size: 18.5px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
}

.news-summary {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--text-2);
}

.news-toggle {
  flex-shrink: 0;
  align-self: center;
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
}

.news-item[open] .news-toggle .t-open {
  display: none;
}

.news-item:not([open]) .news-toggle .t-close {
  display: none;
}

.news-body {
  padding: 4px 30px 28px 122px;
  border-top: 1px dashed var(--border);
  margin-top: 4px;
  padding-top: 20px;
}

.news-body p {
  font-size: 15px;
  color: var(--text-2);
  margin-top: 10px;
}

.news-body p:first-child {
  margin-top: 0;
}

.news-body .note {
  font-size: 13px;
  color: var(--text-3);
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-top: 16px;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 24px 26px;
  transition: transform .25s ease, box-shadow .25s ease;
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.contact-label {
  font-size: 13px;
  color: var(--text-3);
  margin-top: 2px;
}

.contact-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-top: 4px;
  word-break: break-all;
}

.placeholder {
  color: var(--text-3);
  background: var(--bg-soft);
  border: 1px dashed var(--border-strong);
  border-radius: 6px;
  padding: 1px 10px;
  font-size: 14px;
  font-weight: 400;
}

/* ---------- 页脚 ---------- */
.site-footer {
  --ff-text: #c4d1e4;
  --ff-text-2: #98a9bf;
  --ff-text-3: #74869e;
  --ff-border: rgba(255, 255, 255, 0.10);
  background: linear-gradient(165deg, #0a1726 0%, #0c2034 55%, #0a1726 100%);
  border-top: 1px solid rgba(22, 119, 255, 0.32);
  color: var(--ff-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  gap: 48px;
  padding: 64px 24px 48px;
}

.footer-brand .brand {
  margin-bottom: 16px;
  color: #eaf1fb;
}

.footer-positioning {
  font-size: 15px;
  color: var(--ff-text-2);
  max-width: 320px;
}

.footer-mission {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--ff-text-3);
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #eaf1fb;
  margin-bottom: 16px;
  position: relative;
  padding-left: 14px;
}

.footer-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
  background: var(--grad);
}

.footer-links {
  columns: 2;
  column-gap: 28px;
}

.footer-links li {
  margin-bottom: 10px;
  break-inside: avoid;
}

.footer-links a {
  font-size: 14px;
  color: var(--ff-text-2);
}

.footer-links a:hover {
  color: #58d2ff;
}

.footer-sub {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--ff-border);
}

.footer-sub .footer-sub-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ff-text-3);
  margin-bottom: 8px;
}

.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: var(--ff-text-2);
  margin-bottom: 12px;
  line-height: 1.6;
}

.footer-contact svg {
  flex-shrink: 0;
  margin-top: 4px;
  color: #4cc9ff;
}

.footer-bottom {
  border-top: 1px solid var(--ff-border);
  background: #061120;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 18px 24px;
  font-size: 13px;
  color: var(--ff-text-3);
}

.footer-bottom a {
  color: var(--ff-text-3);
}

.footer-bottom a:hover {
  color: #58d2ff;
}

/* ---------- 滚动渐显（仅在 JS 可用时隐藏初始态） ---------- */
html.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .65s ease, transform .65s ease;
}

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

html.js .reveal.d1 { transition-delay: .08s; }
html.js .reveal.d2 { transition-delay: .16s; }
html.js .reveal.d3 { transition-delay: .24s; }

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

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

  .btn,
  .card,
  .honor-item,
  .contact-item,
  .case-card {
    transition: none;
  }
}

/* ==========================================================================
   响应式：平板（768–1199px）
   ========================================================================== */
@media (min-width: 768px) and (max-width: 1199px) {
  .hero-title {
    font-size: 42px;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .metric-grid,
  .strategy-flow,
  .flow-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .data-strip-card {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat:nth-child(3)::before {
    display: none;
  }

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

  .nav-link {
    padding: 8px 9px;
    font-size: 14px;
  }

  .nav-cta {
    margin-left: 4px;
  }
}

/* ==========================================================================
   响应式：手机（<768px）
   ========================================================================== */
@media (max-width: 767px) {
  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 26px;
  }

  .page-banner-title {
    font-size: 30px;
  }

  .hero-inner {
    padding: 72px 20px 88px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-sub {
    font-size: 15.5px;
  }

  .hero-ring {
    display: none;
  }

  /* 汉堡菜单 */
  .hamburger {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(255, 255, 255, .97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 16px 20px 22px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform .3s ease, opacity .3s ease, visibility .3s ease;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link {
    padding: 12px 14px;
    font-size: 16px;
    border-radius: 10px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-cta {
    margin: 10px 0 0;
    justify-content: center;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .metric-grid,
  .metric-grid.cols-3,
  .strategy-flow,
  .flow-steps,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .data-strip {
    margin-top: -40px;
  }

  .data-strip-card {
    grid-template-columns: 1fr;
  }

  .stat + .stat::before {
    display: none;
  }

  .stat {
    padding: 24px 16px;
    border-top: 1px solid var(--border);
  }

  .stat:first-child {
    border-top: none;
  }

  .stat-num {
    font-size: 38px;
  }

  .card {
    padding: 26px 22px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 48px 24px 36px;
  }

  .footer-links {
    columns: 2;
  }

  .footer-bottom-inner {
    justify-content: center;
    text-align: center;
  }

  .news-item summary {
    flex-wrap: wrap;
    padding: 20px;
  }

  .news-body {
    padding: 18px 20px 24px;
  }

  .solution-index {
    font-size: 34px;
  }

  .solution-title {
    font-size: 22px;
  }

  .cta-panel {
    padding: 44px 22px;
  }

  .cta-title {
    font-size: 24px;
  }

  .container {
    padding: 0 20px;
  }
}