/**
 * tpcoder科技 - 官方组件样式系统
 * Components CSS: Stats, Cases, Forms, Accordions, Timeline, Modals
 */

/* ==========================================================================
   1. 数据统计板块 (Stats Counter Bar)
   ========================================================================== */
.stats-banner {
  background: linear-gradient(135deg, #0B132B 0%, #1C2541 100%);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
  color: var(--white);
  box-shadow: 0 20px 40px rgba(11, 19, 43, 0.4);
  margin-top: -50px;
  position: relative;
  z-index: 10;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -16px;
  top: 15%;
  height: 70%;
  width: 1px;
  background-color: rgba(255, 255, 255, 0.12);
}

.stat-number-wrap {
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 8px;
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}

.stat-number-wrap span.accent {
  color: #38BDF8;
}

.stat-label {
  font-size: 0.95rem;
  color: #94A3B8;
  font-weight: 500;
}

/* ==========================================================================
   2. 筛选标签页与案例卡片 (Filter Tabs & Cases)
   ========================================================================== */
.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 9px 22px;
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--slate-600);
  cursor: pointer;
  transition: var(--transition);
}

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

.filter-btn.active {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.case-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(37, 99, 235, 0.4);
}

.case-card-header {
  padding: 24px 28px 16px;
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.case-category {
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--primary-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.case-client-tag {
  font-size: 0.825rem;
  color: var(--slate-500);
}

.case-card-body {
  padding: 28px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.case-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 12px;
  line-height: 1.4;
}

.case-card-desc {
  font-size: 0.925rem;
  color: var(--slate-600);
  line-height: 1.65;
  margin-bottom: 24px;
}

.case-metrics-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background: var(--slate-50);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-top: auto;
  border: 1px solid var(--slate-200);
}

.metric-highlight {
  display: flex;
  flex-direction: column;
}

.metric-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

.metric-label {
  font-size: 0.75rem;
  color: var(--slate-500);
  margin-top: 2px;
}

/* ==========================================================================
   3. 交付流程时间线 (Delivery Process Timeline)
   ========================================================================== */
.timeline-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  margin-top: 40px;
}

.step-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
}

.step-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.step-num {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 20px;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--slate-900);
}

.step-desc {
  font-size: 0.875rem;
  color: var(--slate-600);
  line-height: 1.6;
}

.step-deliverables {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--slate-200);
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 600;
}

/* ==========================================================================
   4. SLA & 企业保障卡片 (SLA Guarantee Cards)
   ========================================================================== */
.sla-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.sla-card {
  background: #111A2E;
  border: 1px solid #1E293B;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  color: var(--white);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.sla-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #2563EB, #06B6D4);
}

.sla-card:hover {
  transform: translateY(-6px);
  border-color: #38BDF8;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.sla-level {
  font-size: 0.85rem;
  font-weight: 700;
  color: #38BDF8;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.sla-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.sla-highlight {
  font-size: 2.2rem;
  font-weight: 800;
  color: #10B981;
  margin-bottom: 16px;
}

.sla-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.sla-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: #94A3B8;
  line-height: 1.5;
}

.sla-item svg {
  color: #10B981;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   5. 团队专家展示 (Team Experts Grid)
   ========================================================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.team-card {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

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

.team-avatar {
  width: 100px;
  height: 100px;
  margin: 0 auto 20px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.team-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 4px;
}

.team-role {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 14px;
}

.team-bio {
  font-size: 0.85rem;
  color: var(--slate-600);
  line-height: 1.6;
}

/* ==========================================================================
   6. 资质认证与合作体系 (Certificates & Partners)
   ========================================================================== */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.cert-card {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.cert-icon {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}

.cert-info h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 6px;
}

.cert-info p {
  font-size: 0.875rem;
  color: var(--slate-500);
  line-height: 1.5;
}

/* ==========================================================================
   7. 常见问题手风琴 (FAQ Accordion)
   ========================================================================== */
.accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.accordion-item {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.accordion-item.active {
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.accordion-header {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--slate-800);
}

.accordion-header:hover {
  color: var(--primary);
}

.accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--slate-400);
  flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
}

.accordion-content {
  padding: 0 24px 24px;
  color: var(--slate-600);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid transparent;
}

.accordion-item.active .accordion-body {
  max-height: 1000px;
  transition: max-height 0.5s ease-in-out;
}

/* ==========================================================================
   8. 商务咨询表单 (Contact Form)
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 1.3fr;
  gap: 56px;
}

.contact-info-card {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: var(--white);
  border-radius: var(--radius-xl);
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-xl);
}

.contact-info-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.contact-info-desc {
  color: var(--slate-300);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 40px;
}

.contact-detail-items {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.detail-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.detail-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.2);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #38BDF8;
  flex-shrink: 0;
}

.detail-label {
  font-size: 0.8rem;
  color: var(--slate-400);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.detail-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
}

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

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

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 8px;
}

.form-label .required {
  color: #EF4444;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--slate-900);
  background-color: var(--slate-50);
  transition: var(--transition);
}

.form-control:focus {
  background-color: var(--white);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

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

.form-help {
  font-size: 0.8rem;
  color: var(--slate-500);
  margin-top: 6px;
}

/* ==========================================================================
   9. 弹窗与交互通知 (Modal & Toast)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--white);
  border-radius: var(--radius-xl);
  max-width: 520px;
  width: 100%;
  padding: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  text-align: center;
  transform: translateY(20px);
  transition: transform 0.3s ease;
  position: relative;
}

.modal-overlay.active .modal-dialog {
  transform: translateY(0);
}

.modal-icon-success {
  width: 64px;
  height: 64px;
  background-color: #ECFDF5;
  color: #10B981;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 12px;
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--slate-600);
  line-height: 1.6;
  margin-bottom: 28px;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--slate-900);
  color: var(--white);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-xl);
  z-index: 2050;
  opacity: 0;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==========================================================================
   10. 资讯与博客列表卡片 (News & Tech Insights)
   ========================================================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.news-card {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.news-card-img {
  width: 100%;
  height: 190px;
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--slate-400);
  position: relative;
}

.news-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--primary);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

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

.news-meta {
  font-size: 0.8rem;
  color: var(--slate-400);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.news-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--slate-900);
  line-height: 1.45;
  margin-bottom: 12px;
}

.news-summary {
  font-size: 0.9rem;
  color: var(--slate-600);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.news-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.875rem;
}