/* ===== Stats 统计带 ===== */
.stats {
  background: var(--gradient-primary);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.stat-item {
  text-align: center;
  padding: 20px;
  border-right: 1px solid rgba(255,255,255,0.15);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-suffix {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-white);
}

.stat-label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.72);
  letter-spacing: 1px;
  margin-top: 8px;
}

/* ===== 关于我们 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: visible;
  box-shadow: var(--shadow-lg);
}

.about-image-wrap > img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-lg);
}

.about-image-badge {
  position: absolute;
  bottom: 24px;
  right: -20px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.about-image-badge .badge-num {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.about-image-badge .badge-label {
  font-size: var(--text-xs);
  color: var(--color-neutral-400);
  margin-top: 4px;
}

.about-content .section-title {
  text-align: left;
  margin-bottom: 20px;
}

.about-desc {
  font-size: var(--text-base);
  color: var(--color-neutral-600);
  line-height: 1.8;
  margin-bottom: 36px;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}

.value-card {
  background: var(--color-neutral-100);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  transition: var(--transition-base);
  border: 1px solid var(--color-neutral-200);
}

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

.value-icon {
  font-size: 28px;
  margin-bottom: 10px;
}

.value-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-neutral-800);
}

/* ===== 产品方案 ===== */
.sol-tab-nav {
  display: flex;
  justify-content: center;
  gap: 0;
  border-bottom: 2px solid var(--color-neutral-200);
  margin-bottom: 0;
}

.sol-tab-btn {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-neutral-600);
  padding: 14px 40px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: inherit;
}

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

.sol-tab-btn.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  font-weight: 600;
}

.sol-tab-panels {
  position: relative;
}

.solution-pane {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-top: 48px;
}

.solution-pane.active {
  display: grid;
}

.solution-pane-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.solution-pane-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
  transition: var(--transition-slow);
}

.solution-pane-img:hover img {
  transform: scale(1.04);
}

.solution-pane-info h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-neutral-800);
  margin-bottom: 16px;
}

.solution-pane-info p {
  color: var(--color-neutral-600);
  line-height: 1.8;
  margin-bottom: 28px;
}

.solution-features {
  list-style: none;
  margin-bottom: 36px;
}

.solution-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  font-size: var(--text-sm);
  color: var(--color-neutral-700);
  border-bottom: 1px solid var(--color-neutral-200);
}

.solution-features li:last-child { border-bottom: none; }

.solution-features li::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== 案例展示 ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  cursor: pointer;
}

.case-card-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
  transition: var(--transition-slow);
}

.case-card:hover .case-card-img {
  transform: scale(1.08);
}

.case-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,17,23,0.85) 0%, transparent 55%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  transition: var(--transition-base);
}

.case-card:hover .case-card-overlay {
  background: linear-gradient(to top, rgba(22,90,99,0.9) 0%, rgba(32,124,134,0.4) 70%, transparent 100%);
}

.case-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-pale);
  background: rgba(32,124,134,0.35);
  border: 1px solid rgba(42,154,170,0.5);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 8px;
  width: fit-content;
}

.case-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
}

.case-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.8);
  opacity: 0;
  transform: translateY(10px);
  transition: var(--transition-base);
}

.case-card:hover .case-desc {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 核心优势 ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.why-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  border: 1px solid var(--color-neutral-200);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.35s ease;
}

.why-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: transparent;
}

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

.why-icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: block;
}

.why-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-neutral-800);
  margin-bottom: 12px;
}

.why-desc {
  font-size: var(--text-sm);
  color: var(--color-neutral-400);
  line-height: 1.8;
}

/* ===== 合作伙伴 ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-neutral-400);
  transition: var(--transition-base);
  letter-spacing: 0.5px;
}

.partner-logo:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-pale);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

/* ===== 联系我们 ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-form-box {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-neutral-200);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-neutral-700);
  margin-bottom: 8px;
}

.required {
  color: #ef4444;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--color-neutral-800);
  background: var(--color-neutral-50);
  transition: var(--transition-fast);
  outline: none;
  box-sizing: border-box;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(32,124,134,0.1);
  background: var(--color-white);
}

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

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%239ba3af'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.btn-block {
  width: 100%;
  justify-content: center;
  padding: 15px;
  font-size: var(--text-base);
  margin-top: 4px;
}

.contact-info-box {
  padding-top: 8px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-info-icon {
  font-size: 22px;
  width: 48px;
  height: 48px;
  background: var(--color-primary-pale);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-neutral-800);
  margin-bottom: 4px;
}

.contact-info-text {
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
  line-height: 1.6;
}

.qrcode-box {
  margin-top: 32px;
  text-align: center;
}

.qrcode-placeholder {
  width: 120px;
  height: 120px;
  background: var(--color-neutral-100);
  border: 2px dashed var(--color-neutral-200);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  color: var(--color-neutral-400);
  margin: 0 auto 10px;
}

.qrcode-label {
  font-size: var(--text-xs);
  color: var(--color-neutral-400);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-neutral-900);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.footer-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  line-height: 1.8;
  max-width: 280px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-link {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
  transition: var(--transition-fast);
}

.social-link:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
}

.footer-col-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
}

.footer-links li + li {
  margin-top: 2px;
}

.footer-links a {
  display: block;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  padding: 5px 0;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary-light);
  padding-left: 4px;
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

.footer-legal a {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.3);
  transition: var(--transition-fast);
}

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

/* ===== 页面内页顶部 Banner ===== */
.page-banner {
  padding: 140px 0 80px;
  background: var(--gradient-hero);
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://picsum.photos/id/1035/1280/400') center/cover no-repeat;
  opacity: 0.12;
}

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

.page-banner h1 {
  font-size: var(--text-5xl);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.page-banner p {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.75);
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
}

.breadcrumb a { color: rgba(255,255,255,0.55); }
.breadcrumb a:hover { color: var(--color-primary-light); }
.breadcrumb .sep { color: rgba(255,255,255,0.3); }
.breadcrumb .current { color: rgba(255,255,255,0.85); }