/* =========================================================
   超恒科技 · 企业官网样式表（阿里云风格 · 企业大厂蓝）
   CHAOHENG TECH — Enterprise Blue Stylesheet
   参考：阿里云官网的白色 + 蓝色、浅蓝分区、卡片与数据条
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  --accent: #165dff;
  --accent-dark: #0e4fd1;
  --accent-light: #f0f6ff;
  --accent-deep: #0c3fae;
  --ink: #1f2329;
  --text: #4e5969;
  --muted: #86909c;
  --faint: #a9b2c0;
  --bg: #ffffff;
  --bg-soft: #f5f9ff;
  --bg-gray: #f7f8fa;
  --line: #e5e6eb;
  --line-blue: #e8f0ff;
  --footer-bg: #0d1b3e;
  --shadow-sm: 0 1px 2px rgba(31, 35, 41, 0.05);
  --shadow-md: 0 8px 24px rgba(22, 93, 255, 0.1);
  --shadow-lg: 0 16px 48px rgba(31, 35, 41, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

/* ---------- 工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 96px 0;
}

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

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

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

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

.kicker {
  display: block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 34px;
  line-height: 1.3;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.section-head p {
  font-size: 16px;
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto;
}

.section-head--left p {
  margin: 0;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 8px;
  font-size: 15.5px;
  font-weight: 500;
  transition: all 0.2s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-lg {
  padding: 15px 40px;
  font-size: 16px;
}

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

.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background: var(--accent-light);
}

.btn-white {
  background: #fff;
  color: var(--accent);
}

.btn-white:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.btn-ghost-white {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
  background: transparent;
}

.btn-ghost-white:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 6px;
}

.btn-block {
  width: 100%;
}

.link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--accent);
  transition: gap 0.2s;
}

.link:hover {
  gap: 10px;
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s;
}

.site-header.is-scrolled {
  box-shadow: 0 4px 20px rgba(31, 35, 41, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  display: grid;
  place-items: center;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.brand-text small {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 2.5px;
  color: var(--faint);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
  padding: 8px 0;
  transition: color 0.2s;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

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

.nav-link.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-cta {
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =========================================================
   首页 Hero
   ========================================================= */
.hero {
  position: relative;
  background:
    radial-gradient(900px 480px at 90% -20%, rgba(22, 93, 255, 0.08), transparent 60%),
    radial-gradient(700px 400px at -10% 110%, rgba(22, 93, 255, 0.06), transparent 60%),
    #f7faff;
  overflow: hidden;
  padding: 88px 0 72px;
}

/* 浅色点阵 */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(22, 93, 255, 0.08) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse at 80% 10%, black 10%, transparent 60%);
  mask-image: radial-gradient(ellipse at 80% 10%, black 10%, transparent 60%);
  pointer-events: none;
}

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

.hero h1 {
  font-size: 48px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-desc {
  font-size: 17px;
  color: var(--muted);
  max-width: 500px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  border-top: 1px solid var(--line-blue);
  padding-top: 28px;
}

.hs-item {
  padding: 0 36px;
  position: relative;
}

.hs-item:first-child {
  padding-left: 0;
}

.hs-item + .hs-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8%;
  bottom: 8%;
  width: 1px;
  background: var(--line);
}

.hs-item strong {
  display: block;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

.hs-item strong em {
  font-style: normal;
  font-size: 18px;
  color: var(--accent);
  margin-left: 2px;
}

.hs-item span {
  display: block;
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 4px;
}

.hero-media {
  position: relative;
}

.hero-media .img-frame {
  border-radius: 14px;
  overflow: hidden;
  background: #e8effa;
  border: 1px solid var(--line-blue);
  box-shadow: var(--shadow-lg);
}

.hero-media img {
  width: 100%;
  height: 460px;
  object-fit: cover;
}

/* 图片上的小标签（浅色卡片，非玻璃） */
.hero-chip {
  position: absolute;
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: 10px;
  box-shadow: var(--shadow-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
}

.hero-chip .c-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent-light);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex: none;
}

.hero-chip--1 {
  top: -18px;
  right: 24px;
}

.hero-chip--2 {
  bottom: -18px;
  left: 24px;
}

/* ---------- 信任条 ---------- */
.trust-bar {
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
  background: #fff;
}

.trust-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  flex-wrap: wrap;
}

.trust-label {
  font-size: 13px;
  color: var(--faint);
  white-space: nowrap;
  letter-spacing: 1px;
}

.trust-logos {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
  align-items: center;
}

.trust-logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--faint);
  transition: color 0.2s;
}

.trust-logo:hover {
  color: var(--ink);
}

/* ---------- 服务卡片 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: all 0.25s ease;
}

.service-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--accent-light);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
}

.service-icon svg {
  width: 22px;
  height: 22px;
}

.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

/* ---------- 为什么选择我们 ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.why-card {
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: all 0.25s;
}

.why-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.why-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 14px;
  line-height: 1;
}

.why-card h3 {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.why-card p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.8;
}

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

.step {
  position: relative;
  padding: 0 28px;
  text-align: left;
}

.step + .step {
  border-left: 1px solid var(--line-blue);
}

.step-dot {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: #fff;
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
  transition: all 0.25s;
}

.step:hover .step-dot {
  background: var(--accent);
  color: #fff;
}

.step h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.step p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 案例卡片 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

.case-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.case-thumb {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #e8effa;
}

.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-card:hover .case-thumb img {
  transform: scale(1.05);
}

.case-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: #fff;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

.case-body {
  padding: 24px 24px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-body h3 {
  font-size: 17.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.case-body > p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 14px;
  flex: 1;
}

.case-meta {
  font-size: 13.5px;
  color: var(--text);
  margin-bottom: 14px;
}

.case-meta strong {
  color: var(--accent);
  font-weight: 700;
}

.case-toggle {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
}

.case-toggle .arr {
  transition: transform 0.25s;
}

.case-card.is-open .case-toggle .arr {
  transform: rotate(180deg);
}

.case-detail {
  border-top: 1px solid var(--line);
  margin-top: 14px;
  padding-top: 14px;
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.9;
  display: none;
}

.case-card.is-open .case-detail {
  display: block;
}

/* ---------- 技术栈 ---------- */
.tech-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
}

.tech-chip {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 18px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
  transition: all 0.2s;
}

.tech-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- 数据统计条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.stat {
  text-align: center;
  padding: 0 28px;
}

.stat + .stat {
  border-left: 1px solid var(--line-blue);
}

.stat .num {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.stat .num em {
  font-style: normal;
  font-size: 24px;
  margin-left: 2px;
}

.stat p {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(135deg, #165dff 0%, #0e4fd1 100%);
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  padding: 72px 0;
}

.cta-inner h2 {
  font-size: 34px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  line-height: 1.3;
}

.cta-inner p {
  font-size: 16.5px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}

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

/* ---------- 页脚（深蓝） ---------- */
.site-footer {
  background: var(--footer-bg);
  color: #9fb0d0;
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

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

.footer-brand .brand-text {
  color: #fff;
}

.footer-brand .brand-text small {
  color: #5f729e;
}

.footer-desc {
  font-size: 14px;
  color: #8ea2c9;
  line-height: 1.9;
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-contact-mini {
  font-size: 13.5px;
  color: #8ea2c9;
  line-height: 2.1;
}

.footer-contact-mini a {
  color: #c3d0ec;
}

.footer-contact-mini a:hover {
  color: #fff;
}

/* 页脚微信二维码 */
.footer-qr {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.footer-qr img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  padding: 4px;
}

.footer-qr span {
  font-size: 13px;
  color: #8ea2c9;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 14.5px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  font-size: 14px;
  color: #8ea2c9;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #5f729e;
}

.footer-bottom a {
  color: #8ea2c9;
}

/* =========================================================
   内页 Banner
   ========================================================= */
.page-banner {
  background: linear-gradient(180deg, var(--accent-light) 0%, #fbfdff 100%);
  border-bottom: 1px solid var(--line-blue);
  padding: 80px 0 64px;
}

.page-banner-inner {
  max-width: var(--container);
}

.crumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}

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

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

.crumb span {
  margin: 0 8px;
  color: var(--faint);
}

.page-banner h1 {
  font-size: 40px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.page-banner p {
  font-size: 16.5px;
  color: var(--muted);
  line-height: 1.8;
}

/* ---------- 服务详情列表 ---------- */
.svc-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 32px 0;
}

.svc-row + .svc-row {
  border-top: 1px solid var(--line);
}

.svc-row.reverse .svc-text {
  order: 2;
}

.svc-text .kicker {
  margin-bottom: 10px;
}

.svc-text h2 {
  font-size: 27px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  line-height: 1.3;
}

.svc-text > p {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 20px;
}

.svc-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
}

.svc-list li {
  font-size: 14px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.svc-list li::before {
  content: "✓";
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  display: grid;
  place-items: center;
  flex: none;
}

.svc-visual {
  border-radius: var(--radius);
  overflow: hidden;
  background: #e8effa;
  border: 1px solid var(--line-blue);
  min-height: 320px;
  display: grid;
  place-items: center;
}

.svc-visual img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

/* ---------- 案例筛选 ---------- */
.case-filter {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- 关于页 ---------- */
.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-visual {
  border-radius: var(--radius);
  overflow: hidden;
  background: #e8effa;
  border: 1px solid var(--line-blue);
  min-height: 400px;
  display: grid;
  place-items: center;
}

.about-visual img {
  width: 100%;
  height: 100%;
  min-height: 400px;
  object-fit: cover;
}

.about-story h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 18px;
  line-height: 1.3;
}

.about-story p {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 16px;
}

.about-facts {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.about-facts .fact strong {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}

.about-facts .fact > span {
  font-size: 13px;
  color: var(--faint);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.value-card {
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.25s;
}

.value-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.value-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.value-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

/* 时间线 */
.timeline {
  max-width: 780px;
  margin: 0 auto;
}

.tl-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 32px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.tl-item:last-child {
  border-bottom: none;
}

.tl-year {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}

.tl-item h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.tl-item p {
  font-size: 14px;
  color: var(--muted);
}

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

.team-card {
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.25s;
}

.team-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.team-photo {
  height: 230px;
  background: #e8effa;
  overflow: hidden;
}

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

.team-info {
  padding: 18px 20px 22px;
}

.team-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.team-info .role {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  margin: 4px 0 10px;
}

.team-info p {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
  align-items: start;
}

.info-list {
  display: grid;
  gap: 0;
}

.info-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.info-item:first-child {
  padding-top: 0;
}

.info-item h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.info-item p,
.info-item a {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
}

.info-item a:hover {
  color: var(--accent);
}

/* 微信二维码卡片 */
.qr-card {
  margin-top: 24px;
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: border-color 0.25s;
}

.qr-card:hover {
  border-color: var(--accent);
}

.qr-card img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  flex: none;
}

.qr-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.qr-info strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.qr-info span {
  font-size: 13.5px;
  color: var(--muted);
}

.contact-form {
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  padding: 36px 34px;
}

.contact-form h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.contact-form > p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 26px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
}

.form-group label .req {
  color: #e03131;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 14.5px;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  color: var(--ink);
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

.form-tip {
  font-size: 12.5px;
  color: var(--faint);
  margin-top: 12px;
}

.form-success {
  display: none;
  text-align: center;
  padding: 36px 10px;
}

.form-success.show {
  display: block;
}

.form-success .ok {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 24px;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
}

.form-success h4 {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.form-success p {
  font-size: 14px;
  color: var(--muted);
}

.form-body.hide {
  display: none;
}

/* 地图 */
.map-box {
  position: relative;
  margin-top: 64px;
  background: var(--bg-gray);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  line-height: 0;
}

.map-box iframe {
  width: 100%;
  height: 380px;
  border: 0;
  display: block;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.25s;
}

.faq-item.is-open {
  border-color: var(--accent);
}

.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
}

.faq-q .arr {
  font-size: 13px;
  color: var(--faint);
  flex: none;
  transition: transform 0.3s;
}

.faq-item.is-open .faq-q .arr {
  transform: rotate(180deg);
}

.faq-a {
  display: none;
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.faq-item.is-open .faq-a {
  display: block;
}

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

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

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero h1 { font-size: 38px; }
  .hero-media img { height: 380px; }

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

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

  .steps { grid-template-columns: repeat(3, 1fr); gap: 32px 0; }
  .step + .step { border-left: none; }

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

  .svc-row { grid-template-columns: 1fr; gap: 36px; }
  .svc-row.reverse .svc-text { order: 0; }

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

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

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 44px; }
  .section-head h2 { font-size: 28px; }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 28px 26px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

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

  .site-nav .nav-link {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin: 18px 0 0;
    justify-content: center;
  }

  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15.5px; }
  .hero-media img { height: 280px; }

  .hs-item { padding: 0 24px; }
  .hs-item strong { font-size: 24px; }

  .stats { grid-template-columns: repeat(2, 1fr); gap: 32px 0; }
  .stat { padding: 0 16px; }
  .stat:nth-child(3) { border-left: none; }

  .cta-inner h2 { font-size: 27px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; }

  .page-banner { padding: 60px 0 48px; }
  .page-banner h1 { font-size: 32px; }

  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 26px 22px; }

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

  .tl-item { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 520px) {
  .container { padding: 0 20px; }

  .service-grid,
  .case-grid,
  .why-grid,
  .team-grid { grid-template-columns: 1fr; }

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

  .trust-bar .container { justify-content: center; }
  .trust-logos { gap: 24px; justify-content: center; }

  .hero-actions .btn { width: 100%; }
  .hero-chip--1 { top: -14px; right: 12px; }
  .hero-chip--2 { bottom: -14px; left: 12px; }

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

/* =========================================================
   轻量视觉组件（无图片依赖 · 阿里云式界面示意）
   ========================================================= */

/* ---------- Hero 数据看板 ---------- */
.hero-media {
  position: relative;
}

.dash {
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.dash-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 20px;
  border-bottom: 1px solid var(--line);
}

.dash-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.dash-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  font-weight: 500;
  color: #10a050;
  background: #f0fdf5;
  border: 1px solid #d9f2e4;
  padding: 4px 12px;
  border-radius: 999px;
}

.dash-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10a050;
}

.dash-body {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 24px;
  padding: 22px;
}

.dash-chart-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.dash-chart-head span {
  font-size: 13px;
  color: var(--muted);
}

.dash-chart-head strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}

.dash-bars {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 150px;
  padding: 12px 12px 0;
  background: var(--bg-gray);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.dbar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  height: 100%;
}

.dbar i {
  width: 100%;
  max-width: 34px;
  border-radius: 6px 6px 3px 3px;
  background: var(--accent);
  min-height: 12px;
  opacity: 0.9;
  animation: barGrow 0.9s cubic-bezier(0.2, 0.7, 0.3, 1) backwards;
  transform-origin: bottom;
}

.dbar:nth-child(1) i { height: 30%; animation-delay: 0.08s; opacity: 0.45; }
.dbar:nth-child(2) i { height: 44%; animation-delay: 0.18s; opacity: 0.55; }
.dbar:nth-child(3) i { height: 56%; animation-delay: 0.28s; opacity: 0.7; }
.dbar:nth-child(4) i { height: 72%; animation-delay: 0.38s; opacity: 0.85; }
.dbar:nth-child(5) i { height: 48%; animation-delay: 0.48s; opacity: 0.6; }
.dbar:nth-child(6) i { height: 62%; animation-delay: 0.58s; opacity: 0.75; }

.dbar span {
  font-size: 11.5px;
  color: var(--faint);
}

@keyframes barGrow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

.dash-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.dash-metric {
  background: var(--bg-gray);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.dash-metric span {
  font-size: 13px;
  color: var(--muted);
}

.dash-metric strong {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

/* 看板底部数据行 */
.dash-foot {
  display: flex;
  justify-content: space-around;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding: 18px 18px 20px;
}

.dash-foot-item {
  flex: 1;
  text-align: center;
}

.dash-foot-item strong {
  display: block;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

.dash-foot-item strong em {
  font-style: normal;
  font-size: 14px;
  color: var(--accent);
  margin-left: 2px;
}

.dash-foot-item > span {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 3px;
}

/* Hero 漂浮标签 */
.hero-chip {
  position: absolute;
  background: #fff;
  border: 1px solid var(--line-blue);
  border-radius: 10px;
  box-shadow: var(--shadow-md);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
}

.hero-chip .c-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent-light);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex: none;
}

.hero-chip--1 {
  top: -6px;
  right: 24px;
}

.hero-chip--2 {
  bottom: -6px;
  left: 24px;
}

/* ---------- 服务页图标面板 ---------- */
.svc-visual {
  position: relative;
  background:
    radial-gradient(360px 220px at 30% 20%, rgba(22, 93, 255, 0.08), transparent 60%),
    radial-gradient(300px 200px at 80% 90%, rgba(22, 93, 255, 0.06), transparent 60%),
    linear-gradient(160deg, #f2f7ff, #e9f1ff);
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  min-height: 320px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.svc-visual::before,
.svc-visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(22, 93, 255, 0.3);
}

.svc-visual::before {
  width: 300px;
  height: 300px;
  animation: spinSlow 30s linear infinite;
}

.svc-visual::after {
  width: 420px;
  height: 420px;
  border-color: rgba(22, 93, 255, 0.18);
  animation: spinSlow 44s linear infinite reverse;
}

@keyframes spinSlow {
  to { transform: rotate(360deg); }
}

.svc-glyph {
  position: relative;
  z-index: 1;
  width: 104px;
  height: 104px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--line-blue);
  color: var(--accent);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
}

.svc-glyph svg {
  width: 46px;
  height: 46px;
}

.svc-row:hover .svc-glyph {
  border-color: var(--accent);
  box-shadow: 0 12px 32px rgba(22, 93, 255, 0.16);
}

/* ---------- 案例封面 ---------- */
.case-cover {
  position: relative;
  height: 200px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(240px 140px at 20% 0%, rgba(22, 93, 255, 0.1), transparent 60%),
    radial-gradient(200px 130px at 90% 100%, rgba(22, 93, 255, 0.08), transparent 60%),
    linear-gradient(150deg, #eef4ff, #e3edff);
}

.case-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(22, 93, 255, 0.12) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}

.case-cover .cc-icon {
  position: relative;
  z-index: 1;
  width: 68px;
  height: 68px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line-blue);
  color: var(--accent);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
}

.case-cover .cc-icon svg {
  width: 30px;
  height: 30px;
}

/* ---------- 关于页视觉 ---------- */
.about-visual {
  position: relative;
  background:
    radial-gradient(360px 220px at 30% 25%, rgba(22, 93, 255, 0.09), transparent 60%),
    radial-gradient(300px 200px at 75% 80%, rgba(22, 93, 255, 0.07), transparent 60%),
    linear-gradient(160deg, #f2f7ff, #e9f1ff);
  border: 1px solid var(--line-blue);
  border-radius: var(--radius);
  min-height: 400px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.about-visual::before,
.about-visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(22, 93, 255, 0.3);
}

.about-visual::before {
  width: 320px;
  height: 320px;
  animation: spinSlow 32s linear infinite;
}

.about-visual::after {
  width: 450px;
  height: 450px;
  border-color: rgba(22, 93, 255, 0.16);
  animation: spinSlow 46s linear infinite reverse;
}

.about-badge {
  position: relative;
  z-index: 1;
  text-align: center;
}

.about-badge .big {
  font-size: 92px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.about-badge .big span {
  font-size: 30px;
  margin-left: 4px;
}

.about-badge p {
  font-size: 15px;
  color: var(--muted);
  margin-top: 14px;
}

/* ---------- 团队头像（首字） ---------- */
.team-photo {
  height: 190px;
  background: linear-gradient(160deg, #f2f7ff, #e9f1ff);
  display: grid;
  place-items: center;
}

.team-avatar {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line-blue);
  color: var(--accent);
  font-size: 36px;
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
}

/* 响应式补充 */
@media (max-width: 768px) {
  .dash-body { grid-template-columns: 1fr; }
  .dash-side { flex-direction: row; flex-wrap: wrap; }
  .dash-metric { flex: 1; min-width: 140px; }
}

@media (max-width: 520px) {
  .dash-foot { flex-wrap: wrap; padding: 14px 12px 16px; }
  .dash-foot-item { min-width: 90px; }
}