/* ===== Design Tokens - 小米橙主题 ===== */
:root {
  --color-primary: #FF6900;
  --color-primary-dark: #E55D00;
  --color-primary-light: #FF8533;
  --color-bg: #FFFFFF;
  --color-bg-light: #F5F5F5;
  --color-bg-dark: #1A1A2E;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-text-white: #FFFFFF;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --max-width: 1200px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header / Navigation ===== */
.header {
  background: var(--color-bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo img {
  height: 40px;
  width: auto;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  font-size: 15px;
  color: var(--color-text-light);
  transition: color 0.2s;
  position: relative;
}

.nav a:visited {
  color: var(--color-text);
}

.nav a:hover,
.nav a.active {
  color: var(--color-primary);
}

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213E 50%, #0F3460 100%);
  color: var(--color-text-white);
  padding: 100px 0;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero .subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero .tagline {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 40px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 105, 0, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  margin-left: 12px;
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-white);
}

.hero .btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Industries ===== */
.industries {
  background: var(--color-bg);
}

.industry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 700px;
  margin: 0 auto;
}

.industry-tag {
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-bg-light);
  border-radius: 20px;
  font-size: 15px;
  color: var(--color-text);
  transition: all 0.2s;
}

.industry-tag:hover {
  background: var(--color-primary);
  color: var(--color-text-white);
  transform: translateY(-2px);
}

/* ===== WeChat Info ===== */
.wechat-info {
  margin-top: 24px;
}

.wechat-id {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text-white);
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.wechat-hint {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-title .en {
  font-size: 14px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.section-title .desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-top: 12px;
}

/* ===== About Preview ===== */
.about-preview {
  background: var(--color-bg);
}

.about-card {
  display: flex;
  gap: 48px;
  align-items: center;
  max-width: 96vw;
  margin: 0 auto;
}

.about-card .avatar {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 64px;
  flex-shrink: 0;
}

.avatar-img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 4px 20px rgba(255, 105, 0, 0.3);
}

.about-card .info h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.about-card .info p {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.about-stats {
  display: flex;
  gap: 24px;
}

.stat-item {
  text-align: center;
}

.stat-item .num {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-item .label {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== Services ===== */
.services {
  background: var(--color-bg-light);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.service-card {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.service-card .icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--color-text-light);
  font-size: 14px;
  margin-bottom: 20px;
}

.service-card .price {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 600;
}

.service-price {
  font-size: 22px;
  color: var(--color-primary);
  font-weight: 700;
  margin-top: 12px;
}

.service-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-light);
}

/* ===== Friend Links ===== */
.friend-links {
  background: var(--color-bg-light);
  padding: 40px 0;
  border-top: 1px solid #eee;
}

/* ===== Cases / Testimonials ===== */
.cases {
  background: var(--color-bg);
}

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

.case-card {
  background: var(--color-bg-light);
  border-radius: var(--border-radius-lg);
  padding: 24px;
}

.case-card .quote {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.8;
}

.case-card .author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.case-card .author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-light);
}

.case-card .author-name {
  font-size: 14px;
  font-weight: 600;
}

.case-card .author-role {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ===== CTA Section ===== */
.cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-white);
  text-align: center;
  padding: 80px 0;
}

.cta h2 {
  font-size: 32px;
  margin-bottom: 12px;
}

.cta p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta .btn {
  background: var(--color-bg);
  color: var(--color-primary);
}

.cta .btn:hover {
  background: var(--color-bg-light);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 40px 0;
  text-align: center;
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer .nav {
  gap: 24px;
}

.footer .nav a:hover {
  color: var(--color-primary-light);
}

.footer .copyright {
  font-size: 13px;
}

/* ===== Cooperation Steps ===== */
.cooperation-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.coop-step {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  flex: 1 1 180px;
  max-width: 200px;
  position: relative;
  transition: all 0.3s;
}

.coop-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.coop-step .step-icon {
  font-size: 36px;
  margin-bottom: 8px;
}

.coop-step .step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}

.coop-step h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.coop-step p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== Footer WeChat CTA ===== */
.footer-wechat {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-white);
  text-align: center;
  padding: 32px 20px;
}

.footer-wechat h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

.footer-wechat p {
  font-size: 15px;
  opacity: 0.9;
  margin-bottom: 12px;
}

.footer-wechat .wechat-id-big {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.footer-wechat .wechat-qr {
  width: 160px;
  height: 160px;
  background: white;
  border-radius: 12px;
  padding: 10px;
  margin: 0 auto 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.footer-wechat .wechat-hint {
  font-size: 13px;
  opacity: 0.7;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
}

.pagination a, .pagination span {
  padding: 10px 20px;
  border-radius: var(--border-radius);
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s;
}

.pagination a {
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.pagination a:hover {
  background: var(--color-primary);
  color: white;
}

.pagination .current {
  background: var(--color-primary);
  color: white;
  border: 1px solid var(--color-primary);
}

.pagination .disabled {
  color: var(--color-text-muted);
  border: 1px solid #ddd;
  pointer-events: none;
}

/* ===== Software Page ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: all 0.3s;
}

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

.feature-card .feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

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

.feature-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.step .step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}

.step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 96vw;
  margin: 0 auto;
}

.tip-card {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.tip-card h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.tip-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== Page Header (inner pages) ===== */
.page-header {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213E 100%);
  color: var(--color-text-white);
  padding: 80px 0 60px;
  text-align: center;
}

.page-header h1 {
  font-size: 36px;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== Blog ===== */
.blog-list {
  max-width: 800px;
  margin: 0 auto;
}

.blog-item {
  padding: 24px 0;
  border-bottom: 1px solid #eee;
}

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

.blog-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.blog-item h3 a:hover {
  color: var(--color-primary);
}

.blog-item .meta {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.blog-item .excerpt {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ===== About Page ===== */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-content h2 {
  font-size: 24px;
  margin-bottom: 16px;
  margin-top: 40px;
  color: var(--color-text);
}

.about-content h2:first-child {
  margin-top: 0;
}

.about-content p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.8;
}

.timeline {
  border-left: 3px solid var(--color-primary);
  padding-left: 24px;
  margin: 24px 0;
}

.timeline-item {
  margin-bottom: 24px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
}

.timeline-item .year {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 600;
}

.timeline-item .desc {
  font-size: 15px;
  color: var(--color-text-light);
}

/* ===== Services Page ===== */
.service-detail {
  max-width: 800px;
  margin: 0 auto;
}

.service-detail-card {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  border-top: 4px solid var(--color-primary);
}

.service-detail-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
}

.service-detail-card .features {
  margin: 16px 0;
}

.service-detail-card .features li {
  padding: 8px 0;
  color: var(--color-text-light);
  position: relative;
  padding-left: 24px;
}

.service-detail-card .features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.service-detail-card .price-tag {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 24px 0;
}

.service-detail-card .price-tag span {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* ===== Data Section ===== */
.data-section {
  background: var(--color-bg-light);
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.data-item {
  text-align: center;
  padding: 24px;
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.data-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.data-label {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== FAQ ===== */
.faq {
  background: var(--color-bg-light);
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-item summary {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  position: relative;
  padding-right: 40px;
}

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-primary);
  transition: transform 0.3s;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item summary:hover {
  color: var(--color-primary);
}

.faq-item p {
  padding: 0 24px 20px;
  color: var(--color-text-light);
  line-height: 1.8;
  font-size: 14px;
}

/* ===== WeChat QR ===== */
.wechat-qr-section {
  margin: 32px auto;
  text-align: center;
}

.wechat-qr {
  width: 180px;
  height: 180px;
  background: white;
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.wechat-hint {
  margin-top: 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.wechat-id-large {
  font-size: 28px;
  font-weight: 700;
  color: white;
  margin: 16px 0 8px;
  letter-spacing: 2px;
}

.wechat-hint-bottom {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Scroll Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Industry Detail ===== */
.industry-detail {
  background: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--color-primary);
}

.industry-detail h3 {
  font-size: 22px;
  margin-bottom: 16px;
  color: var(--color-text);
}

.industry-detail p {
  color: var(--color-text-light);
  margin-bottom: 12px;
  line-height: 1.8;
  font-size: 15px;
}

.industry-detail p:last-child {
  margin-bottom: 0;
}

.industry-detail strong {
  color: var(--color-primary);
}

/* ===== Trust Badges ===== */
.trust-section {
  background: var(--color-bg);
  border-top: 1px solid #eee;
  border-bottom: 1px solid #eee;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 96vw;
  margin: 0 auto;
  text-align: center;
}

@media (max-width: 768px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .trust-item .trust-num {
    font-size: 28px;
  }
  
  .trust-item .trust-label {
    font-size: 12px;
  }
}

.trust-item .trust-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.trust-item .trust-label {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== SVG Icons ===== */
.icon-svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
}

.icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.icon-circle svg {
  width: 24px;
  height: 24px;
  fill: white;
}

/* ===== Brand Story ===== */
.brand-story {
  max-width: 700px;
  margin: 0 auto;
}

.brand-story p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

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

.brand-story .highlight {
  background: linear-gradient(135deg, #FFF3E0, #FFE0B2);
  padding: 20px 24px;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-primary);
  margin: 24px 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

/* ===== Values ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 700px;
  margin: 24px auto 0;
}

.value-item {
  padding: 20px;
  background: var(--color-bg-light);
  border-radius: var(--border-radius);
}

.value-item h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.value-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== Hamburger Menu ===== */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all 0.3s;
}

/* ===== Anti-Dot + Header Fix ===== */
.header::before, .header::after,
.header *::before, .header *::after,
body::before, body::after,
html::before, html::after,
.logo::before, .logo::after,
.container::before, .container::after,
.nav::before, .nav::after,
.logo *::before, .logo *::after {
  content: none !important;
  display: none !important;
}

.header, .header *, .nav, .nav *, .logo, .logo *,
.container, .container *, ul, li {
  list-style: none !important;
  list-style-type: none !important;
  list-style-image: none !important;
  text-decoration: none !important;
}

.logo img { max-height: 28px !important; max-width: 120px !important; object-fit: contain; }

/* ===== AI Chat Floating Button (Top Right) ===== */
.ai-chat-float {
  position: fixed;
  top: 76px;
  right: 16px;
  background: linear-gradient(135deg, #ff8c00, #ff6b35);
  color: white;
  border-radius: 24px;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(255,107,53,0.4);
  z-index: 999;
  transition: transform 0.2s;
  font-size: 13px;
  font-weight: 500;
}
.ai-chat-float:active { transform: scale(0.95); }
.ai-chat-float .chat-icon { width: 24px; height: 24px; border-radius: 6px; }



/* ===== Responsive ===== */

  .footer-wechat .wechat-qr { width: 120px; height: 120px; }

  /* 手机合作流程 */
  .cooperation-steps {
    flex-direction: column;
    align-items: center;
  }
  .coop-step {
    max-width: 100%;
    width: 100%;
    flex-direction: row;
    display: flex;
    align-items: center;
    text-align: left;
    gap: 12px;
    padding: 16px 20px;
  }
  .coop-step .step-icon { font-size: 28px; margin-bottom: 0; }
  .coop-step .step-num { margin: 0; flex-shrink: 0; }
  .coop-step h4 { margin-bottom: 2px; font-size: 15px; }
  .coop-step p { font-size: 12px; }

  /* 手机 logo 微调 */
  .logo img {
    max-height: 24px !important;
    max-width: 100px !important;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero .subtitle {
    font-size: 16px;
  }

  /* 手机导航横排 */
  .header .container {
    flex-wrap: wrap;
    height: auto;
    padding: 8px 20px;
  }

  .menu-toggle {
    display: none !important;
  }

  .nav {
    display: flex !important;
    position: static;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 0;
    padding: 4px 0 8px;
    width: 100%;
    box-shadow: none;
    scrollbar-width: none;
    justify-content: flex-start;
  }

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

  .nav a {
    font-size: 14px;
    padding: 6px 14px;
    white-space: nowrap;
    border-bottom: none;
    width: auto;
    flex-shrink: 0;
  }

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

  .about-stats {
    justify-content: center;
  }

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

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

  .data-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
    padding: 0;
  }

  .data-item {
    padding: 6px 1px;
  }

  .data-item .data-num {
    font-size: 18px;
  }

  .data-item .data-label {
    font-size: 10px;
  }

  .data-trend {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }

  .trend-item {
    text-align: center;
  }

  .section {
    padding: 60px 0;
  }

  .section-title h2 {
    font-size: 24px;
  }

  .hero .btn-group {
    flex-direction: column;
    align-items: center;
  }

  .btn-outline {
    margin-left: 0;
  }

  .service-detail-card {
    padding: 24px;
  }


@media (max-width: 768px) {

  .ai-chat-float {
    top: 68px;
    right: 12px;
    padding: 6px 12px;
    font-size: 12px;
  }
  .ai-chat-float .chat-icon { width: 22px; height: 22px; }

  .feature-grid { grid-template-columns: 1fr !important; gap: 16px !important; }
  .guide-steps { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  
  .footer-wechat {
    padding: 32px 20px;
  }
}

/* 友情链接 */
.friend-links {
  padding: 40px 0 30px;
  background: #f9f9f9;
  text-align: center;
}

.links-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
  margin-bottom: 20px;
}

.link-item {
  display: inline-block;
  padding: 6px 16px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  color: #666;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.link-item:hover {
  color: #FF6900;
  border-color: #FF6900;
  background: #FFF5EE;
}

.link-placeholder {
  display: inline-block;
  padding: 6px 16px;
  color: #ccc;
  font-size: 14px;
  border: 1px dashed #ddd;
  border-radius: 4px;
}

.link-request {
  padding: 12px 20px;
  background: #fff;
  border-radius: 8px;
  display: inline-block;
  border: 1px solid #e0e0e0;
}

.link-request p {
  margin: 0;
  color: #666;
  font-size: 14px;
}

@media (max-width: 768px) {
  .friend-links {
    padding: 30px 0 20px;
  }
  .links-grid {
    gap: 8px 12px;
  }
  .link-item, .link-placeholder {
    padding: 5px 12px;
    font-size: 13px;
  }

  .faq-item summary {
    padding: 16px;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 32px;
  }

  .software-features {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .software-feature-card {
    padding: 24px;
  }

  .software-feature-card .feature-icon {
    font-size: 36px;
    margin-bottom: 12px;
  }

  .software-feature-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }

  .software-feature-card p {
    font-size: 14px;
    line-height: 1.6;
  }
}