/* ============================================================
   智景云官网 - 全局样式（科技公司蓝白风格）
   主色调：#197aff，辅以清冷的青蓝色系，整体简洁现代
   ============================================================ */

:root {
  /* 主色：科技蓝 */
  --primary: #197aff;
  --primary-dark: #0b5ed7;
  --primary-light: #eaf3ff;
  --accent: #00c6ff;
  /* 辅助色：青蓝 / 灰蓝 */
  --heritage: #3a5a7c;
  --heritage-2: #5a7a9c;
  --heritage-light: #eef5ff;
  --vermilion: #197aff;
  --vermilion-dark: #0b5ed7;
  --warm: #38bdf8;
  /* 文字色：冷灰蓝 */
  --ink: #0f172a;
  --ink-2: #475569;
  --ink-3: #94a3b8;
  --bg: #ffffff;
  --bg-soft: #f5f9ff;
  --bg-warm: #eef5ff;
  --bg-deep: #0a1628;
  --line: #dbe4f0;
  --line-warm: #c8ddf5;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 8px 26px rgba(15, 58, 130, 0.08);
  --shadow-warm: 0 8px 26px rgba(25, 122, 255, 0.12);
  --shadow-sm: 0 3px 10px rgba(15, 58, 130, 0.06);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 大标题使用无衬线体，符合科技公司简洁现代风格 */
h1,
h2 {
  font-family: var(--font);
}

/* 图标容器：SVG 尺寸跟随 font-size，全站自动适配 */
.ico svg,
.agent-icon svg {
  width: 1em;
  height: 1em;
  display: block;
}

/* SVG symbol 定义库（隐藏，供 <use> 引用） */
.svg-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* 线性图标：跟随父级 font-size */
.ic {
  display: block;
}

/* 案例大图标（灯笼等） */
.ic-lg {
  width: 96px;
  height: 96px;
  color: var(--vermilion);
  opacity: 0.9;
}

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

ul {
  list-style: none;
}

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

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.3s, border-color 0.3s;
}

.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(15, 58, 130, 0.06);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
}

.logo-img {
  height: 40px;
  max-height: 40px;
  width: auto;
  max-width: 190px;
  flex: none;
  display: block;
  object-fit: contain;
}

.logo small {
  font-size: 12px;
  color: var(--ink-3);
  font-weight: 400;
  display: block;
  line-height: 1.2;
}

.logo-text {
  line-height: 1.15;
}

.nav-links {
  display: flex;
  gap: 26px;
  align-items: center;
}

.nav-links>a:not(.nav-cta),
.nav-item>.nav-link {
  font-size: 15px;
  color: var(--ink-2);
  position: relative;
  padding: 4px 0;
  white-space: nowrap;
}

.nav-links>a:not(.nav-cta)::after,
.nav-item>.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s;
}

.nav-links>a:not(.nav-cta):hover,
.nav-links>a:not(.nav-cta).active,
.nav-item>.nav-link:hover,
.nav-item>.nav-link.active {
  color: var(--primary);
}

.nav-links>a:not(.nav-cta):hover::after,
.nav-links>a:not(.nav-cta).active::after,
.nav-item>.nav-link:hover::after,
.nav-item>.nav-link.active::after {
  width: 100%;
}

/* ---------- 二级下拉菜单（我们的产品 / 解决方案） ---------- */
.nav-item {
  position: relative;
}

.nav-item>.nav-link {
  display: inline-flex;
  align-items: center;
}

.caret {
  display: inline-block;
  font-size: 10px;
  margin-left: 5px;
  color: var(--ink-3);
  transition: transform 0.25s;
}

.has-dropdown:hover .caret,
.has-dropdown.open .caret {
  transform: rotate(180deg);
  color: var(--primary);
}

.dropdown {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  display: grid;
  grid-template-columns: repeat(4, 178px);
  gap: 20px 30px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(25, 122, 255, 0.14);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
  z-index: 120;
}

.has-dropdown:hover .dropdown,
.has-dropdown.open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* hover 桥接带：鼠标从一级菜单滑向面板不闪断 */
.dropdown::before {
  content: "";
  position: absolute;
  top: -16px;
  left: 0;
  right: 0;
  height: 16px;
}

.drop-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 1px;
  padding-bottom: 8px;
  margin-bottom: 6px;
  border-bottom: 1px dashed var(--line);
  white-space: nowrap;
}

.dropdown a {
  display: block;
  font-size: 14px;
  color: var(--ink-2);
  padding: 6px 0;
  white-space: nowrap;
  transition: color 0.2s, transform 0.2s;
}

.dropdown a:hover {
  color: var(--vermilion);
  transform: translateX(3px);
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff !important;
  padding: 9px 22px;
  border-radius: 999px;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.nav-toggle {
  display: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--ink);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 150px 0 90px;
  /*background: url("../banner.jpg") center / cover no-repeat, var(--bg-soft);*/
  background: url("../pic/banner04.png") center / cover no-repeat, var(--bg-soft);
  overflow: hidden;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-copy {
  flex: 1.1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  font-weight: 600;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }
}

.hero h1 {
  font-size: 44px;
  line-height: 1.28;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.hero h1 .grad {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  color: var(--ink-2);
  font-size: 17px;
  max-width: 560px;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.hero-stats {
  display: flex;
  gap: 44px;
  margin-top: 46px;
}

.hero-stats .num {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
}

.hero-stats .num small {
  font-size: 16px;
  font-weight: 600;
}

.hero-stats .lab {
  font-size: 13px;
  color: var(--ink-3);
}

/* Hero 右侧视觉面板 */
.hero-visual {
  flex: 0.9;
  position: relative;
  min-height: 380px;
}

.dash-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  animation: float 5s ease-in-out infinite;
}

.dash-main {
  width: 400px;
  top: 0;
  right: 0;
  animation-delay: 0s;
}

.dash-sub-1 {
  width: 230px;
  bottom: 30px;
  right: 260px;
  animation-delay: 1s;
}

.dash-sub-2 {
  width: 200px;
  bottom: 0;
  right: 30px;
  animation-delay: 2s;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-12px);
  }
}

.dash-card h4 {
  font-size: 13px;
  color: var(--ink-3);
  font-weight: 600;
  margin-bottom: 12px;
}

.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 120px;
}

.bar-chart i {
  flex: 1;
  border-radius: 5px 5px 0 0;
  background: linear-gradient(180deg, #38bdf8, var(--primary));
  opacity: 0.85;
}

.bar-chart i:nth-child(even) {
  background: linear-gradient(180deg, #7dd3fc, #38bdf8);
}

.metric-row {
  display: flex;
  gap: 22px;
  margin-bottom: 12px;
}

.metric-row .m b {
  display: block;
  font-size: 22px;
  color: var(--primary);
}

.metric-row .m span {
  font-size: 12px;
  color: var(--ink-3);
}

.ring {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: conic-gradient(var(--accent) 0 72%, #d6e6f7 72% 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 6px auto;
}

.ring::before {
  content: "72%";
  width: 64px;
  height: 64px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--ink);
  font-size: 16px;
}

.dash-card .cap {
  text-align: center;
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 8px;
}

/* ---------- 通用 Section ---------- */
.section {
  padding: 90px 0;
}

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

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

.section-head .tag {
  display: inline-block;
  color: var(--primary);
  background: var(--primary-light);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--ink-2);
  font-size: 16px;
}

/* ---------- Agent 矩阵（飞书产品卡片风格） ---------- */
.agent-band {
  padding: 0;
}

.agent-band .agent-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  width: 100%;
}

.agent-band .agent-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: none;
  border-right: 1px solid var(--line);
  border-radius: 0;
  padding: 28px 22px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s, background 0.25s;
  position: relative;
  overflow: hidden;
  color: inherit;
}

.agent-band .agent-card:last-child {
  border-right: none;
}

.agent-band .agent-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(25, 122, 255, 0.12);
  z-index: 1;
}

.agent-band .agent-card:nth-child(1):hover {
  background: linear-gradient(135deg, #eef6ff 0%, #dbeafe 100%);
}

.agent-band .agent-card:nth-child(2):hover {
  background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
}

.agent-band .agent-card:nth-child(3):hover {
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 100%);
}

.agent-band .agent-card:nth-child(4):hover {
  background: linear-gradient(135deg, #f0f9ff 0%, #dbeafe 100%);
}

.agent-band .agent-card:nth-child(5):hover {
  background: linear-gradient(135deg, #eef2ff 0%, #dbeafe 100%);
}

.agent-band .agent-card:nth-child(6):hover {
  background: linear-gradient(135deg, #ecfeff 0%, #dbeafe 100%);
}

.agent-band .agent-icon {
  width: 78px;
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: transform 0.25s;
}

.agent-band .agent-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
  display: block;
}

.agent-band .agent-card:hover .agent-icon {
  transform: scale(1.06);
}

.agent-band .agent-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  flex-wrap: wrap;
}

.agent-band .agent-card h3 em {
  font-style: normal;
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  background: var(--primary-light);
  padding: 2px 6px;
  border-radius: 999px;
  margin-left: auto;
}

.agent-band .agent-card p {
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.65;
  margin-bottom: 0;
  flex: 1;
}

@media (max-width: 1200px) {
  .agent-band .agent-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .agent-band .agent-card:nth-child(3n) {
    border-right: none;
  }

  .agent-band .agent-card {
    border-bottom: 1px solid var(--line);
  }

  .agent-band .agent-card:nth-last-child(-n+3) {
    border-bottom: none;
  }
}

@media (max-width: 720px) {
  .agent-band .agent-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .agent-band .agent-card:nth-child(3n) {
    border-right: 1px solid var(--line);
  }

  .agent-band .agent-card:nth-child(2n) {
    border-right: none;
  }

  .agent-band .agent-card:nth-last-child(-n+3) {
    border-bottom: 1px solid var(--line);
  }

  .agent-band .agent-card:nth-last-child(-n+2) {
    border-bottom: none;
  }
}

@media (max-width: 480px) {
  .agent-band .agent-grid {
    grid-template-columns: 1fr;
  }

  .agent-band .agent-card {
    border-right: none;
  }

  .agent-band .agent-card:last-child {
    border-bottom: none;
  }
}

/* ---------- 子系统栅格 ---------- */
.sys-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.sys-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 26px 22px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}

/* 悬停时卡片底部蓝色线条从左到右铺满 */
.sys-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--primary), #38bdf8);
  border-radius: 0 3px 3px 0;
  transition: width 0.45s ease;
}

.sys-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(25, 122, 255, 0.12);
}

.sys-card:hover::after {
  width: 100%;
}

.sys-card .ico {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-light), #dbeafe);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}

.sys-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.sys-card p {
  font-size: 13.5px;
  color: var(--ink-2);
}

/* ---------- 功能清单 ---------- */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feat-col {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: box-shadow 0.25s;
}

.feat-col:hover {
  box-shadow: var(--shadow);
}

.feat-col header {
  padding: 16px 22px;
  background: linear-gradient(120deg, var(--primary-light), #f0f7ff);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.feat-col header h3 {
  font-size: 17px;
  color: var(--primary-dark);
}

.feat-col header a {
  font-size: 13px;
  color: var(--primary);
}

.feat-col ul {
  padding: 14px 22px 18px;
}

.feat-col li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 14px;
  color: var(--ink-2);
  border-bottom: 1px dashed var(--line);
}

.feat-col li:last-child {
  border-bottom: none;
}

.feat-col li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex: none;
}

/* ---------- 差异化卖点 ---------- */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.diff-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 34px 26px;
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s;
}

/* 悬停时卡片内容适度放大 */
.diff-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 16px 40px rgba(25, 122, 255, 0.16);
}

.diff-card .ico {
  width: 96px;
  height: 96px;
  margin: 0 auto 18px;
  border-radius: 16px;
  color: #fff;
  font-size: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.diff-card:nth-child(1) .ico,
.diff-card .ico {
  background: linear-gradient(135deg, #197aff, #38bdf8);
}

.diff-card:nth-child(2) .ico {
  background: linear-gradient(135deg, #00c6ff, #38bdf8);
}

.diff-card:nth-child(3) .ico {
  background: linear-gradient(135deg, #3a5a7c, #5a7a9c);
}

.diff-card:nth-child(4) .ico {
  background: linear-gradient(135deg, #0f172a, #475569);
}

/* 「不止于功能」：透明底彩色 PNG 图标，去掉渐变色块底 */
.diff-card .ico.diff-ico {
  background: none;
  box-shadow: none;
  padding: 0;
  transition: transform 0.25s ease;
}

.diff-card .ico.diff-ico img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* 悬停时图标额外放大一点，强化焦点 */
.diff-card:hover .ico.diff-ico {
  transform: scale(1.06);
}

.diff-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.diff-card p {
  font-size: 14px;
  color: var(--ink-2);
}

/* ---------- 解决方案 ---------- */
.sol-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.sol-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #fff;
  padding: 34px;
  cursor: pointer;
}

.sol-card.scenic {
  background: linear-gradient(200deg, rgba(13, 31, 78, 0.15), rgba(13, 31, 78, 0.88)),
  linear-gradient(160deg, #197aff, #0b5ed7);
}

.sol-card.park {
  background: linear-gradient(200deg, rgba(13, 31, 78, 0.15), rgba(13, 31, 78, 0.88)),
  linear-gradient(160deg, #00c6ff, #0b5ed7);
}

.sol-card .tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.sol-card .tags span {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 3px 12px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.sol-card h3 {
  font-size: 28px;
  margin-bottom: 10px;
}

.sol-card p {
  font-size: 14.5px;
  opacity: 0.92;
  margin-bottom: 20px;
  max-width: 480px;
}

.sol-card .more {
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-dark);
  transition: transform 0.2s;
}

.sol-card .more:hover {
  transform: translateX(4px);
}

/* ---------- IoT ---------- */
.iot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.iot-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 24px;
  transition: all 0.25s;
}

.iot-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.iot-card .ico {
  width: 50px;
  height: 50px;
  flex: none;
  border-radius: 13px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.iot-card h3 {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.iot-card p {
  font-size: 13.5px;
  color: var(--ink-2);
}

/* ---------- 技术架构分层图 ---------- */
.arch-stack {
  max-width: 1020px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.arch-layer {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #f8fbff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(15, 58, 130, 0.04);
  transition: transform 0.25s, box-shadow 0.25s;
}

.arch-layer:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.arch-layer+.arch-layer {
  margin-top: 30px;
}

/* 层间数据流动虚线 */
.arch-layer:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -31px;
  width: 2px;
  height: 31px;
  background: repeating-linear-gradient(180deg, #c8ddf5 0 5px, transparent 5px 11px);
  transform: translateX(-50%);
  z-index: 1;
}

/* 层标题栏：横跨层级块顶部 */
.arch-head {
  padding: 12px 24px;
  text-align: center;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 2px;
}

/* 五层配色：自上而下同色系蓝色渐变，贴合整站蓝色调 */
.arch-portal .arch-head {
  background: linear-gradient(160deg, #6ba3f4, #4a8def);
}

.arch-apps .arch-head {
  background: linear-gradient(160deg, #4a8def, #2f7ef7);
}

.arch-ai .arch-head {
  background: linear-gradient(160deg, #2f7ef7, #197aff);
}

.arch-data .arch-head {
  background: linear-gradient(160deg, #197aff, #0f6ae8);
}

.arch-iot .arch-head {
  background: linear-gradient(160deg, #0f6ae8, var(--primary-dark));
}

.arch-body {
  flex: 1;
  padding: 18px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.arch-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.arch-row+.arch-row {
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.arch-group-label {
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 2px;
  font-weight: 600;
}

.arch-group-label::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--vermilion);
  margin-right: 7px;
  vertical-align: 2px;
}

.arch-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.arch-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: 8px;
  background: #f0f7ff;
  border: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink);
  white-space: nowrap;
  transition: border-color 0.2s, color 0.2s;
}

.arch-chip:hover {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

.arch-chip small {
  color: var(--ink-3);
  font-size: 11.5px;
  font-weight: 400;
}

.arch-chip.key {
  background: var(--primary-light);
  border-color: #bcd8ff;
  font-weight: 600;
}

.arch-chip.key small {
  color: var(--vermilion-dark);
}

@media (max-width: 768px) {
  .arch-layer+.arch-layer {
    margin-top: 26px;
  }

  .arch-layer:not(:last-child)::after {
    left: 50%;
    bottom: -27px;
    height: 27px;
  }

  .arch-head {
    font-size: 14px;
    padding: 11px 18px;
  }

  .arch-body {
    padding: 16px 18px;
  }

  .arch-chip {
    white-space: normal;
  }
}

/* ---------- 智能化管理系统（图文交替版块） ---------- */
/* 上邻五层架构同为白底，去掉顶部内边距，使视觉间距与其他版块一致 */
.smart-sys {
  padding-top: 0;
}

.smart-row {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}

.smart-row+.smart-row {
  margin-top: 72px;
}

.smart-row.flip .smart-visual {
  order: 2;
}

.smart-row.flip .smart-text {
  order: 1;
}

/* 左侧/右侧模拟界面 */
.smart-visual {
  position: relative;
}

/* 版块配图：统一使用 pic/ico/01.png 后台界面截图（替换原 .smart-mock 模拟界面） */
.smart-visual .smart-shot {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  box-shadow: none;
}

.smart-mock {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 18px 44px rgba(13, 71, 161, 0.12);
}

.mock-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: linear-gradient(90deg, var(--primary-light), #f6faff);
  border-bottom: 1px solid var(--line);
}

.mock-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #c7dbff;
}

.mock-bar i:first-child {
  background: #8fb6ff;
}

.mock-bar span {
  margin-left: 8px;
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 1px;
}

.mock-body {
  display: flex;
  gap: 14px;
  padding: 18px;
}

.mock-side {
  flex: 0 0 54px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding-top: 4px;
}

.mock-side i {
  height: 8px;
  border-radius: 4px;
  background: #e3eeff;
}

.mock-side i:first-child {
  background: var(--primary);
  opacity: 0.85;
}

.mock-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mock-stats {
  display: flex;
  gap: 10px;
}

.mock-stats b {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: #f0f7ff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 16px;
  color: var(--primary);
}

.mock-stats small {
  font-size: 10.5px;
  font-weight: 400;
  color: var(--ink-3);
}

.mock-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 96px;
  padding: 12px;
  background: #f6faff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.mock-chart i {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, var(--accent), var(--primary));
  opacity: 0.85;
}

/* 悬浮标签 */
.mock-tag {
  position: absolute;
  padding: 8px 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1px;
  box-shadow: 0 10px 24px rgba(25, 122, 255, 0.32);
  white-space: nowrap;
}

.mock-tag.t1 {
  left: -12px;
  bottom: 34px;
}

.mock-tag.t2 {
  right: -10px;
  top: 26px;
  background: linear-gradient(120deg, #38bdf8, var(--primary));
}

/* 右侧/左侧文字 */
/* 去掉 1/2/3/4 数字标识及其圆形背景 */
.smart-num {
  display: none;
}

/* 内容区样式与「六大智慧化方向」右侧 .panel-body 保持一致 */
.smart-text h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.smart-list {
  list-style: none;
  margin-bottom: 28px;
}

.smart-list li {
  position: relative;
  padding: 14px 0 14px 32px;
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
  /* 纵向布局：标题一行，描述文字换行到下一行 */
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.smart-list li strong {
  color: var(--ink);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.6;
}

.smart-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 18px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  /* 与六大智慧化方向列表标记保持一致：实蓝底 + 白色勾 */
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 按钮与「六大智慧化方向」的 .btn-primary 保持一致（主色渐变 + 白字） */
.smart-more {
  display: inline-flex;
  align-items: center;
  margin-top: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

.smart-more:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  color: #fff;
}

@media (max-width: 900px) {
  .smart-row {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .smart-row+.smart-row {
    margin-top: 52px;
  }

  .smart-row.flip .smart-visual,
  .smart-row.flip .smart-text {
    order: 0;
  }

  .mock-tag.t1 {
    left: 8px;
  }

  .mock-tag.t2 {
    right: 8px;
  }

  .smart-text h3 {
    font-size: 21px;
  }
}

/* ---------- 临时聚焦：?arch=1 隐藏非架构板块，方便截图验证 */
body.arch-focus .hero,
body.arch-focus .section:not(.arch-focal),
body.arch-focus footer {
  display: none !important;
}

body.arch-focus {
  background: #f5f9ff;
}

body.arch-focus .arch-focal {
  padding: 60px 0;
}

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

.news-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
}

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

.news-card .cover {
  height: 170px;
  background: linear-gradient(140deg, var(--primary), #38bdf8);
  position: relative;
  overflow: hidden;
}

.news-card:nth-child(2) .cover {
  background: linear-gradient(140deg, #00c6ff, #38bdf8);
}

.news-card:nth-child(3) .cover {
  background: linear-gradient(140deg, #4f46e5, #818cf8);
}

.news-card .cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent 0 18px, rgba(255, 255, 255, 0.06) 18px 36px);
}

.news-card .body {
  padding: 20px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card time {
  font-size: 12.5px;
  color: var(--ink-3);
}

.news-card h3 {
  font-size: 16.5px;
  margin: 8px 0 10px;
  line-height: 1.5;
}

.news-card:hover h3 {
  color: var(--primary);
}

.news-card p {
  font-size: 13.5px;
  color: var(--ink-2);
  flex: 1;
}

/* ---------- CTA 横幅 ---------- */
/* CTA 通栏：背景铺满视口宽度，内容由 .cta-inner (container) 对齐 */
.cta-banner {
  background: url('../pic/联系.png') center / cover no-repeat;
  border-radius: 0;
  padding: 80px 0;
  color: var(--ink);
  position: relative;
  overflow: hidden;
}

.cta-banner .cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-banner h2 {
  font-size: 30px;
  margin-bottom: 12px;
  color: var(--ink);
}

.cta-banner p {
  color: var(--ink-2);
  font-size: 15.5px;
  max-width: 560px;
}

.cta-banner .btn {
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  flex: none;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 720px) {
  .cta-banner {
    padding: 56px 0;
  }

  .cta-banner .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
  }

  .cta-banner h2 {
    font-size: 24px;
  }
}

/* ---------- 右侧悬浮侧栏 ---------- */
.float-bar {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.10), 0 1px 4px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  width: 77px;
  padding: 12px 0;
}

.fb-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 0;
  text-decoration: none;
  color: var(--ink-2);
  transition: background 0.2s, color 0.2s;
  position: relative;
}

.fb-item:hover {
  background: #f5f7ff;
  color: var(--primary);
}

.fb-item + .fb-item {
  border-top: 1px solid #f0f2f7;
}

.fb-ico {
  width: 51px;
  height: 51px;
  border-radius: 50%;
  background: #e8efff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  animation: fbIcoScale 2.6s ease-in-out infinite;
}

.fb-ico img {
  width: 41px;
  height: 41px;
  object-fit: contain;
}

.fb-ico svg {
  width: 38px;
  height: 38px;
}

.fb-ico--plain {
  background: transparent;
  border-radius: 0;
}

.fb-label {
  font-size: 12px;
  line-height: 1.3;
  text-align: center;
  white-space: nowrap;
  font-weight: 500;
}

@keyframes fbIcoScale {
  0%, 100% { transform: scale(1.08); }
  50% { transform: scale(0.86); }
}

/* 移动端隐藏悬浮侧栏 */
@media (max-width: 900px) {
  .float-bar {
    display: none;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-deep);
  color: #c6d2ec;
  padding: 70px 0 0;
  margin-top: 0px;
}

.site-footer .logo-img {
  filter: brightness(0) invert(1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
}

.footer-grid .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-grid .about-txt {
  font-size: 13.5px;
  line-height: 1.9;
  opacity: 0.85;
}

.footer-grid .about-txt + .about-txt {
  margin-top: 10px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 15.5px;
  margin-bottom: 18px;
  font-weight: 600;
}

.footer-grid ul li {
  margin-bottom: 10px;
}

.footer-grid ul a {
  font-size: 13.5px;
  opacity: 0.8;
  transition: opacity 0.2s, color 0.2s;
}

.footer-grid ul a:hover {
  opacity: 1;
  color: #fff;
}

.footer-contact li {
  display: flex;
  gap: 8px;
  align-items: baseline;
  font-size: 13.5px;
  opacity: 0.85;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
  opacity: 0.6;
}

/* ---------- 子页通用 ---------- */
/* ========== 各页面 Banner 样式（按页面分开写，互不影响） ========== */
/* 首页 banner 见 .hero / .hero-copy；关于我们页 banner 见 .about-hero */

/* ---- 内页 Banner 公共基础 ---- */
.page-hero {
  padding: 130px 0 60px;
  text-align: center;
}

.page-hero .tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.page-hero h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--ink-2);
  max-width: 640px;
  margin: 0 auto;
}

/* ---- 功能详情页 Banner ---- */
.hero-features {
  background: url('../pic/banner02.png') center / cover no-repeat, var(--bg-soft);
  padding: 150px 0 100px;
}

.hero-features h1 {
  font-size: 36px;
}

/* ---- 解决方案页 Banner ---- */
.hero-solutions {
  /*background:*/
  /*radial-gradient(700px 300px at 18% 0%, rgba(26, 92, 255, 0.12), transparent 65%),*/
  /*radial-gradient(700px 300px at 85% 10%, rgba(56, 189, 248, 0.14), transparent 65%),*/
  /*var(--bg-soft);*/
  background: url('../pic/案例banner.png') center / cover no-repeat, var(--bg-soft);
  padding: 150px 0 100px;
}

.hero-solutions .tag {
  background: #dbeafe;
  color: var(--vermilion);
}

.hero-solutions h1 {
  font-size: 36px;
}

/* ---- 新闻动态页 Banner ---- */
.hero-news {
  /*background:*/
          /*radial-gradient(800px 300px at 50% 0%, rgba(56, 189, 248, 0.14), transparent 65%),*/
          /*var(--bg-soft);*/
  background: url('../pic/新闻动态.png') center / cover no-repeat, var(--bg-soft);
  padding: 150px 0 100px;
}

.hero-news .tag {
  background: var(--primary-light);
  color: var(--primary);
}

.hero-news h1 {
  font-size: 36px;
}

/* Tab 切换 */
.tab-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 40px auto 50px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 11px 30px;
  /* border-radius: 999px; */
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}

.tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.tab-panel {
  display: none;
  animation: fadeUp 0.4s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

/* 场景详情（解决方案页） */
.scene-block {
  margin-bottom: 60px;
}

.scene-block .head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.scene-block .head .bar {
  width: 6px;
  height: 34px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

.scene-block .head h2 {
  font-size: 26px;
  font-weight: 800;
}

.pain-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 40px;
}

.pain-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.pain-item h4 {
  font-size: 15.5px;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.pain-item p {
  font-size: 13.5px;
  color: var(--ink-2);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.value-card {
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 18px;
}

.value-card .num {
  font-size: 34px;
  font-weight: 800;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.value-card .lab {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-top: 6px;
}

/* 功能详情页布局 */
.feat-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.feat-side {
  position: sticky;
  top: 100px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.feat-side a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  color: var(--ink-2);
  margin-bottom: 4px;
  transition: all 0.2s;
}

.feat-side a:hover,
.feat-side a.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.feat-section {
  margin-bottom: 54px;
}

.feat-section h2 {
  font-size: 24px;
  font-weight: 800;
  padding-left: 14px;
  border-left: 5px solid var(--primary);
  margin-bottom: 8px;
}

.feat-section .desc {
  color: var(--ink-2);
  margin: 0 0 22px 19px;
  font-size: 14.5px;
}

.feat-rows {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feat-row {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: all 0.2s;
}

.feat-row:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.feat-row .ico {
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 10px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
}

.feat-row h4 {
  font-size: 15.5px;
  margin-bottom: 4px;
}

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

/* 新闻列表页 */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.news-item {
  display: flex;
  gap: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  transition: all 0.25s;
  align-items: center;
}

.news-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: transparent;
}

.news-item .date {
  flex: none;
  width: 84px;
  text-align: center;
  border-right: 1px solid var(--line);
  padding-right: 22px;
}

.news-item .date b {
  display: block;
  font-size: 26px;
  color: var(--primary);
  font-weight: 800;
  line-height: 1.1;
}

.news-item .date span {
  font-size: 12.5px;
  color: var(--ink-3);
}

.news-item .txt h3 {
  font-size: 17.5px;
  margin-bottom: 6px;
}

.news-item .txt h3:hover {
  color: var(--primary);
}

.news-item .txt p {
  font-size: 13.5px;
  color: var(--ink-2);
}

.news-item .txt .meta {
  margin-top: 10px;
  display: flex;
  gap: 14px;
  font-size: 12.5px;
  color: var(--ink-3);
}

.news-item .txt .meta span {
  background: var(--bg-soft);
  padding: 2px 12px;
  border-radius: 999px;
}

/* ---------- 滚动入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- 13 子系统（陈老巷版） ---------- */
.sys-grid-13 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.sys-grid-13 .sys-card.featured {
  background: #fff;
}

.sys-grid-13 .sys-card .ico.heritage {
  background: linear-gradient(135deg, #dbeafe, #93c5fd);
  color: var(--vermilion);
}

/* 十三大子系统：彩色 PNG 图标 */
.sys-card .ico.sys-ico {
  width: 56px;
  height: 56px;
  background: none;
  border-radius: 12px;
  overflow: hidden;
  padding: 0;
}

.sys-card .ico.sys-ico img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* ---------- 陈老巷案例横幅 ---------- */
.case-banner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 50px;
  align-items: center;
  background: linear-gradient(120deg, var(--heritage-light), #fff);
  border: 1px solid var(--line-warm);
  border-radius: 20px;
  padding: 50px 60px;
  position: relative;
  overflow: hidden;
}

.case-banner::before {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(25, 122, 255, 0.10), transparent 70%);
}

.case-banner .tag {
  display: inline-block;
  background: var(--vermilion);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.case-banner h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 14px;
}

.case-banner h2 em {
  font-style: normal;
  color: var(--vermilion);
}

.case-banner p {
  color: var(--ink-2);
  margin-bottom: 22px;
}

.case-stats {
  display: flex;
  gap: 36px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.case-stats div b {
  display: block;
  font-size: 26px;
  color: var(--vermilion);
  font-weight: 800;
}

.case-stats div span {
  font-size: 12.5px;
  color: var(--ink-3);
}

/* ---------- 历史街区方案卡（Tab 切换布局） ---------- */
.solution-tabs {}

.tab-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.tab-nav .tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s;
}
.tab-nav .tab-btn:hover {
  color: var(--primary);
}

.tab-nav .tab-btn.active {
  background: none;
  color: var(--primary);
  border-bottom-color: var(--primary);
  box-shadow: none;
}

.tab-nav .tab-ico {
  width: 99px;
  height: 99px;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.tab-nav .tab-ico img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* 五大智慧化方向：标签文字统一 17px 且不换行 */
.tab-nav .tab-btn .tab-label {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  white-space: nowrap;
}

.tab-panels {}

.tab-panel {
  display: none;
  grid-template-columns: 1.1fr 1fr;
  gap: 50px;
  align-items: center;
  animation: fadeIn 0.35s ease;
}

.tab-panel.active {
  display: grid;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel-visual {
  background: linear-gradient(135deg, #f5faff, #e6f2ff);
  border-radius: 20px;
  padding: 0;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 图片直接铺满整个 panel-visual */
.panel-visual img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  display: block;
  border-radius: 20px;
}

.vis-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 16px 40px rgba(25, 122, 255, 0.1);
}

.vis-card h4 {
  font-size: 16px;
  margin-bottom: 20px;
  color: var(--ink);
}

.vis-ring {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  margin: 0 auto 16px;
  mask: radial-gradient(transparent 55%, black 56%);
  -webkit-mask: radial-gradient(transparent 55%, black 56%);
}

.vis-bars {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  height: 120px;
  margin-bottom: 16px;
}

.vis-bars i {
  width: 18px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 4px 4px 0 0;
}

.vis-cap {
  text-align: center;
  font-size: 13px;
  color: var(--ink-2);
}

.vis-metrics {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 16px;
}

.vis-metrics div {
  text-align: center;
}

.vis-metrics b {
  display: block;
  font-size: 28px;
  color: var(--primary);
}

.vis-metrics span {
  font-size: 12px;
  color: var(--ink-2);
}

.vis-qr {
  width: 120px;
  height: 120px;
  margin: 0 auto 16px;
  background: repeating-linear-gradient(0deg, var(--primary) 0, var(--primary) 4px, transparent 4px, transparent 8px), repeating-linear-gradient(90deg, var(--primary) 0, var(--primary) 4px, transparent 4px, transparent 8px);
  background-blend-mode: multiply;
  border-radius: 8px;
}

.vis-dash {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 16px;
}

.vis-dash .d {
  text-align: center;
}

.vis-dash .d b {
  display: block;
  font-size: 20px;
  color: var(--primary);
}

.vis-dash .d span {
  font-size: 11px;
  color: var(--ink-2);
}

.vis-bolt {
  font-size: 64px;
  text-align: center;
  line-height: 1;
  margin-bottom: 16px;
  color: var(--primary);
}

.panel-body h3 {
  font-size: 28px;
  margin-bottom: 12px;
  color: var(--ink);
}

.panel-lead {
  font-size: 16px;
  color: var(--ink-2);
  margin-bottom: 24px;
}

.panel-body ul {
  margin-bottom: 28px;
}

.panel-body ul li {
  font-size: 15px;
  color: var(--ink-2);
  padding: 14px 0 14px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.panel-body ul li strong {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.panel-body ul li span {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
}

.panel-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
}

.panel-body ul li::after {
  content: "✓";
  position: absolute;
  left: 5px;
  top: 17px;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.panel-actions {
  display: flex;
  gap: 14px;
}

.panel-actions .btn {
  padding: 12px 24px;
  font-size: 14px;
}

@media (max-width: 1080px) {
  .tab-nav {
    flex-wrap: wrap;
    gap: 8px;
  }

  .tab-nav .tab-btn {
    padding: 12px 14px;
    font-size: 13px;
  }

  .tab-nav .tab-ico {
    width: 86px;
    height: 86px;
    font-size: 18px;
  }

  .tab-panel.active {
    grid-template-columns: 1fr;
  }

  .panel-visual {
    min-height: 280px;
    padding: 0;
  }

  .panel-visual img {
    min-height: 280px;
    max-height: none;
  }
}

@media (max-width: 720px) {
  /* 标签文字设为 17px 不换行后，小屏幕改为横向滚动，避免撑破页面 */
  .tab-nav {
    flex-wrap: nowrap;
    gap: 6px;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tab-nav::-webkit-scrollbar {
    display: none;
  }

  .tab-nav .tab-btn {
    flex: 0 0 auto;
    min-width: 0;
    padding: 10px 10px;
  }

  .panel-actions {
    flex-direction: column;
  }
}

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

/* ---------- 关于我们页（about.html） ---------- */
.about-hero {
  padding: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: 460px;
}

.about-hero-img {
  width: 100%;
  height: auto;
  display: block;
}

.about-hero-copy {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(1200px, 92vw);
  z-index: 2;
  text-align: left;
}

/* 蓝色大标题 */
.about-hero-title-blue {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.25;
  margin: 12px 0 8px;
  letter-spacing: 0.5px;
}

/* 黑色副标题 */
.about-hero-title-sub {
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  margin: 0 0 16px;
}

/* 描述段落 */
.about-hero-desc {
  font-size: 15.5px;
  color: var(--ink-2);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 560px;
}

/* 标签网格 */
.about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about-hero-tag {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 8px;
  background: #f0f5ff;
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 600;
  border: 1px solid #e0eaff;
  transition: all 0.25s ease;
}

.about-hero-tag:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(26, 92, 255, 0.25);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.4) 38%, rgba(255, 255, 255, 0) 62%);
  z-index: 1;
  pointer-events: none;
}

.about-intro {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 52px;
  align-items: center;
}

.about-intro-text .about-lead {
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.95;
  margin-bottom: 16px;
}

.about-intro-media img {
  width: 100%;
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  display: block;
}

.about-stats {
  justify-content: center;
  gap: 64px;
  flex-wrap: wrap;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.about-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.about-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

.about-card .ico {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  overflow: hidden;
}

.about-card .ico img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.about-card h4 {
  font-size: 17px;
  margin-bottom: 8px;
}

.about-card p {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.75;
}

.about-card--sub {
  padding: 22px 16px;
  text-align: center;
}

.about-card--sub .ico {
  margin: 0 auto 12px;
  width: 50px;
  height: 50px;
}

.about-card--sub .ico img {
  width: 30px;
  height: 30px;
}

.about-card--sub h4 {
  font-size: 15px;
}

/* 发展历程时间轴 */
.timeline {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 32px 28px;
}

.timeline-dot {
  position: absolute;
  left: -24px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--primary-light);
}

.timeline-year {
  font-weight: 800;
  color: var(--primary);
  font-size: 16px;
  margin-bottom: 4px;
}

.timeline-body h4 {
  font-size: 17px;
  margin-bottom: 5px;
}

.timeline-body p {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.7;
}

/* 价值观网格 */
.about-value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.about-value-grid .value-card {
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 18px;
}

.about-value-grid .value-card h4 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--primary);
}

.about-value-grid .value-card p {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.7;
}

/* 关于我们页响应式 */
@media (max-width: 900px) {
  .about-intro {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid--sm {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .about-grid,
  .about-grid--sm,
  .about-value-grid {
    grid-template-columns: 1fr;
  }
  .about-stats {
    gap: 36px;
  }
  .about-hero {
    display: block;
    min-height: 0;
  }
  .about-hero-img {
    width: 100%;
  }
  .about-hero-copy {
    position: static;
    transform: none;
    text-align: left;
    width: auto;
    padding: 36px 0 40px;
  }
  .about-hero-title-blue {
    font-size: 28px;
  }
  .about-hero-title-sub {
    font-size: 20px;
  }
  .about-hero-desc {
    font-size: 14px;
    max-width: 100%;
  }
  .about-hero-tags {
    justify-content: center;
  }
  .about-hero::before {
    display: none;
  }
}

/* ====== 关于我们页：新版板块样式 ====== */

/* 公司简介标题 */
.about-section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--ink);
  text-align: center;
  margin-bottom: 24px;
}

.about-intro-text p {
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.95;
  margin-bottom: 16px;
}

/* 价值观横排卡片（愿景/使命/经营理念/价值观） */
.about-value-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 72px;
}

.about-vcard {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px 28px;
  background: #fff;
  transition: transform 0.25s, box-shadow 0.25s;
}

.about-vcard:not(:first-child) {
  border-left: 1px solid var(--line);
}

.about-vcard:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.about-vico {
  width: 62px;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-vico img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.about-vcard strong {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.about-vcard p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.6;
  margin: 0;
}

/* 业务能力 2 行 3 列（首卡占一列两行） */
.about-grid--biz {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, minmax(190px, auto));
}

.about-card--biz-lead {
  grid-column: 1;
  grid-row: 1 / span 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 34px;
}

.about-card--biz {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 36px 24px;
  background: #fff;
  border: none;
  border-radius: var(--radius);
  box-shadow: 0 2px 12px rgba(16, 24, 40, 0.05);
  transition: transform 0.25s, box-shadow 0.25s;
}

/* 悬停：底部蓝色线条从左至右铺满 */
.about-card--biz::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #38bdf8);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.45s ease;
}

.about-card--biz:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 30px rgba(26, 92, 255, 0.14);
}

.about-card--biz:hover::after {
  transform: scaleX(1);
}

.about-card--biz .ico {
  margin: 0 auto 16px;
  width: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border-radius: 0;
  overflow: visible;
}

.about-card--biz .ico img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.about-card--biz h4 {
  font-size: 17px;
  margin-bottom: 6px;
}

.about-card--biz p {
  font-size: 13.5px;
  color: var(--ink-2);
}

.about-card--biz-lead .ico {
  width: 104px;
  height: 104px;
}

.about-card--biz-lead .ico img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.about-card--biz-lead h4 {
  font-size: 21px;
  margin-bottom: 12px;
}

.about-card--biz-lead p {
  font-size: 14.5px;
  line-height: 1.8;
  max-width: 330px;
}

/* ========== 软著自动滚动 ========== */
.scroll-wrapper {
  overflow: hidden;
  position: relative;
  margin-top: 10px;
}

/* 两行展示，上下错开 */
.scroll-row {
  overflow: hidden;
}

.scroll-row + .scroll-row {
  margin-top: 18px;
}

.scroll-track {
  display: flex;
  width: max-content;
  animation: scrollRight 90s linear infinite;
}

/* 第二行：反向滚动 + 半个卡片宽（97px）错位偏移 */
.scroll-row--stagger .scroll-track {
  animation-name: scrollLeftStagger;
}

.scroll-track-inner {
  display: flex;
  gap: 18px;
  flex-shrink: 0;
}

.scroll-item {
  flex-shrink: 0;
  width: 176px;
  height: 240px;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}

.scroll-item:hover {
  transform: scale(1.04);
  box-shadow: 0 8px 28px rgba(26,92,255,0.15);
}

.scroll-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 第一行：从左至右滚动（内容向右移动） */
@keyframes scrollRight {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

/* 第二行：从右至左滚动（内容向左移动），并错位 97px */
@keyframes scrollLeftStagger {
  0% { transform: translateX(-97px); }
  100% { transform: translateX(calc(-50% - 97px)); }
}

/* 悬停暂停滚动 */
.scroll-wrapper:hover .scroll-track {
  animation-play-state: paused;
}

/* ========== 简单4步流程 ========== */
.steps-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 20px;
}

.step-item {
  flex: 1;
  max-width: 240px;
  text-align: center;
  padding: 0 12px;
}

.step-num {
  display: inline-block;
  width: 48px;
  height: 48px;
  line-height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 14px;
}

.step-item h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--ink);
}

.step-item p {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.65;
}

.step-line {
  width: 60px;
  height: 2px;
  background: repeating-linear-gradient(
          to right,
          var(--line) 0,
          var(--line) 6px,
          transparent 6px,
          transparent 12px
  );
  flex-shrink: 0;
  margin: 0 4px;
  margin-bottom: 60px;
}

/* 新版板块响应式 */
@media (max-width: 900px) {
  .about-value-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-vcard:nth-child(odd) {
    border-left: none;
  }
  .about-grid--biz {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto;
  }
  .about-card--biz-lead {
    grid-column: 1 / -1;
    grid-row: auto;
    padding: 36px 28px;
  }
  .steps-row {
    flex-wrap: wrap;
    gap: 24px;
  }
  .step-line {
    display: none;
  }
  .step-item {
    max-width: 100%;
  }
}

@media (max-width: 560px) {
  .about-value-row {
    grid-template-columns: 1fr;
  }
  .about-vcard:not(:first-child) {
    border-left: none;
    border-top: 1px solid var(--line);
  }
  .about-grid--biz {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .about-card--biz-lead {
    grid-column: auto;
    grid-row: auto;
    padding: 30px 22px;
  }
  .scroll-item {
    width: 144px;
    height: 200px;
  }
}

@media (max-width: 1080px) {
  .sys-grid-13 {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-banner {
    grid-template-columns: 1fr;
    padding: 36px 32px;
  }
}

@media (max-width: 720px) {
  .sys-grid-13 {
    grid-template-columns: 1fr;
  }

  .logo-img {
    height: 30px;
    max-height: 30px;
    max-width: 140px;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner {
    flex-direction: column;
  }

  .hero-visual {
    width: 100%;
    min-height: 300px;
  }

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

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

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

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

  .feat-rows {
    grid-template-columns: 1fr;
  }

  .pain-list {
    grid-template-columns: 1fr;
  }

  .feat-layout {
    grid-template-columns: 1fr;
  }

  .feat-side {
    position: static;
  }

  .hero h1 {
    font-size: 36px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 18px 24px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  /* 移动端：二级菜单变手风琴 */
  .nav-item {
    width: 100%;
  }

  .nav-item>.nav-link {
    width: 100%;
    justify-content: space-between;
  }

  .dropdown {
    position: static;
    transform: none;
    display: none;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 20px;
    padding: 14px 16px;
    margin-top: 10px;
    border-radius: var(--radius-sm);
    box-shadow: none;
    background: var(--bg-soft);
    opacity: 1;
    visibility: visible;
  }

  .has-dropdown:hover .dropdown {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .has-dropdown.open .dropdown {
    display: grid;
  }

  .feat-grid,
  .diff-grid,
  .value-grid,
  .iot-grid,
  .news-grid,
  .sol-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-stats {
    gap: 26px;
    flex-wrap: wrap;
  }

  .cta-banner {
    flex-direction: column;
    text-align: center;
    padding: 44px 28px;
  }

  .dash-main {
    width: 300px;
  }

  .dash-sub-1 {
    right: auto;
    left: 0;
  }

  .section {
    padding: 64px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .news-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .news-item .date {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 0 0 10px;
    width: auto;
    display: flex;
    gap: 8px;
    align-items: baseline;
  }
}
/* ---------- 公司案例页 ---------- */
.case-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
}

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

.case-item .case-photo {
  border-radius: calc(var(--radius) - 4px);
  overflow: hidden;
  aspect-ratio: 302 / 203;
  background: var(--bg-soft);
}

.case-item .case-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-item h3 {
  font-size: 17px;
  margin: 18px 0 10px;
}

.case-item p {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.case-item .case-btn {
  margin-top: 16px;
  align-self: flex-start;
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 13.5px;
  padding: 9px 26px;
  border-radius: 4px;
  transition: all 0.25s;
}

.case-item .case-btn:hover {
  opacity: 0.88;
}

@media (max-width: 960px) {
  .case-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .case-list-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 预约演示弹窗 ---------- */
.demo-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.demo-modal.open {
  display: flex;
}

.demo-modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(10, 22, 40, 0.5);
}

.demo-modal-box {
  position: relative;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 400px;
  max-width: calc(100vw - 40px);
  padding: 28px 30px 30px;
}

.demo-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.demo-modal-head h3 {
  font-size: 20px;
}

.demo-modal-close {
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  color: var(--ink-3);
  transition: color 0.2s;
}

.demo-modal-close:hover {
  color: var(--ink);
}

.demo-field {
  margin-bottom: 16px;
}

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

.demo-field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.demo-field input:focus {
  border-color: var(--primary);
}

.demo-submit {
  width: 100%;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.demo-submit:hover {
  opacity: 0.9;
}

.demo-success {
  display: none;
  text-align: center;
  padding: 24px 0 10px;
}

/* ---------- 微信咨询弹窗 ---------- */
.wx-modal-box {
  width: 360px;
  border-top: 4px solid var(--primary);
  text-align: center;
  padding: 34px 30px 26px;
}

.wx-close {
  position: absolute;
  top: 14px;
  right: 18px;
}

.wx-title {
  font-size: 18px;
  margin-bottom: 20px;
}

.wx-qr {
  width: 230px;
  height: 230px;
  display: block;
  margin: 0 auto;
}

.wx-tip {
  margin-top: 18px;
  font-size: 13.5px;
  color: var(--ink-2);
}

.wx-tip a {
  color: var(--primary);
}

/* ---------- 电话沟通弹窗 ---------- */
.tel-num {
  font-size: 30px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.tel-time {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 20px;
}

.tel-call {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  padding: 11px 44px;
  border-radius: 8px;
  transition: opacity 0.2s;
}

.tel-call:hover {
  opacity: 0.9;
}

.tel-call + .wx-tip {
  margin-top: 18px;
}

/* ---------- 在线咨询弹窗（微信 + 电话） ---------- */
.contact-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 22px 0 16px;
  color: var(--ink-3);
  font-size: 13px;
}

.contact-divider::before,
.contact-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

#contactModal .tel-num {
  font-size: 26px;
  margin-bottom: 16px;
}