:root {
  --primary-teal: #0d9488;
  --primary-cyan: #06b6d4;
  --primary-blue: #0284c7;
  --dark-slate: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --bg-light: #f4fafb;
  --bg-card: #ffffff;
  --border-light: #d8edf0;
  --shadow-sm: 0 2px 8px rgba(13, 148, 136, 0.06);
  --shadow-md: 0 10px 25px -5px rgba(2, 132, 199, 0.1);
  --shadow-lg: 0 20px 35px -8px rgba(15, 23, 42, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --gradient-tech: linear-gradient(135deg, #0d9488 0%, #06b6d4 50%, #0284c7 100%);
  --gradient-soft: linear-gradient(180deg, #e6f7f9 0%, #f4fafb 100%);
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-light);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  width: 100%;
  overflow-x: hidden;
  background: var(--bg-light);
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

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

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-box {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.brand-name-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark-slate);
  letter-spacing: -0.5px;
}

.brand-tag {
  font-size: 0.72rem;
  color: var(--primary-teal);
  font-weight: 600;
}

.nav-container {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
}

.nav-links li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.92rem;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links li a:hover {
  color: var(--primary-teal);
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-tech);
  color: #ffffff;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(6, 182, 212, 0.4);
  color: #ffffff;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  color: var(--primary-teal);
  border: 1px solid var(--primary-teal);
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-outline:hover {
  background: var(--bg-light);
  color: var(--primary-blue);
  border-color: var(--primary-blue);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark-slate);
}

/* 首屏 Hero（无图片，纯技术排版+CSS动效） */
.hero-section {
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.15) 0%, rgba(244, 250, 251, 1) 70%);
  padding: 70px 0 60px;
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #e0f4f7;
  color: #0f766e;
  border: 1px solid #bce6ec;
  padding: 5px 12px;
  border-radius: 30px;
  font-size: 0.82rem;
  font-weight: 600;
}

.hero-title {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--dark-slate);
  line-height: 1.25;
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

.hero-feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 15px;
  border-top: 1px dashed var(--border-light);
  font-size: 0.88rem;
  color: var(--text-main);
}

.hero-feature-tags span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-code-panel {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.panel-dots {
  display: flex;
  gap: 6px;
}

.panel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #cbd5e1;
}

.panel-dot.red { background: #f87171; }
.panel-dot.yellow { background: #fbbf24; }
.panel-dot.green { background: #34d399; }

.panel-tag {
  font-size: 0.75rem;
  background: #f0fdfa;
  color: var(--primary-teal);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.matrix-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.matrix-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  border: 1px solid #edf2f7;
}

.matrix-model {
  font-weight: 700;
  color: var(--dark-slate);
}

.matrix-status {
  color: #10b981;
  font-size: 0.8rem;
  font-weight: 600;
}

.matrix-price {
  background: #e0f2fe;
  color: #0369a1;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
}

/* 通用区块排版 */
.section {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-light);
}

.section-alt {
  background: #f0f9fa;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 45px;
}

.section-subtitle {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-teal);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--dark-slate);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
}

/* 数据指标栏 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.stat-num {
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--primary-teal);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 4px;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 卡片网格 */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.cards-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.card-badge {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  background: #e0f4f7;
  color: #0f766e;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-main);
}

.card-list li::before {
  content: "✓ ";
  color: var(--primary-teal);
  font-weight: 800;
}

/* 平台介绍深度模块 */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-highlight-box {
  background: #ffffff;
  border-left: 4px solid var(--primary-teal);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: var(--shadow-sm);
}

.about-highlight-title {
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 6px;
}

.model-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.model-tag {
  background: #ffffff;
  border: 1px solid #cfe6eb;
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
}

/* 流程时间线 */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}

.step-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  position: relative;
}

.step-num {
  width: 36px;
  height: 36px;
  background: var(--gradient-tech);
  color: #ffffff;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}

.step-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 对比评测 9.9分高亮区 */
.rating-banner {
  background: linear-gradient(135deg, #0f172a 0%, #134e4a 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-lg);
}

.rating-left {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rating-score-box {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.score-huge {
  font-size: 3.2rem;
  font-weight: 900;
  color: #38bdf8;
  line-height: 1;
}

.score-total {
  font-size: 1.2rem;
  color: #94a3b8;
}

.stars-row {
  color: #f59e0b;
  font-size: 1.2rem;
}

.compare-table-wrapper {
  overflow-x: auto;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.compare-table th, .compare-table td {
  padding: 14px 18px;
  border-bottom: 1px solid #f1f5f9;
}

.compare-table th {
  background: #f8fafc;
  font-weight: 700;
  color: var(--dark-slate);
}

.compare-table .highlight-col {
  background: #f0fdfa;
  font-weight: 700;
  color: var(--primary-teal);
}

/* 案例中心（含图展示区） */
.case-gallery {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.case-media-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.case-img-container {
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 12px;
  background: #e2e8f0;
}

.case-img-container img {
  width: 100%;
  height: auto;
  display: block;
}

.case-info-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark-slate);
  margin-bottom: 4px;
}

.case-info-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.promo-banners-group {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.banner-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

/* 需求匹配表单 */
.form-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  max-width: 800px;
  margin: 0 auto;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--dark-slate);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-main);
  background: #ffffff;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary-teal);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* 客户评论网格（6条） */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-tech);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.reviewer-name {
  font-weight: 700;
  color: var(--dark-slate);
  font-size: 0.95rem;
}

.reviewer-role {
  font-size: 0.78rem;
  color: var(--primary-teal);
}

.review-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* FAQ 手风琴（12条） */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 16px 20px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark-slate);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-icon {
  font-size: 1.1rem;
  color: var(--primary-teal);
  transition: transform 0.2s ease;
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* 资讯与百科文章 */
.articles-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-top: 20px;
}

.article-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed #e2e8f0;
}

.article-list li:last-child {
  border-bottom: none;
}

.article-list a {
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

.article-list a:hover {
  color: var(--primary-teal);
}

/* 页脚 */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 30px;
  border-top: 1px solid #1e293b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-col-title {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #38bdf8;
}

.footer-qr-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #1e293b;
  padding: 12px;
  border-radius: var(--radius-sm);
}

.footer-qr-img {
  width: 76px;
  height: 76px;
  border-radius: 4px;
  background: #ffffff;
  overflow: hidden;
}

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

.footer-qr-text {
  font-size: 0.8rem;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.friend-links-area {
  padding-top: 24px;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
}

.friend-links-area span {
  color: #cbd5e1;
  font-weight: 600;
}

.friend-links-area a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.friend-links-area a:hover {
  color: #38bdf8;
}

.footer-bottom {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #1e293b;
  text-align: center;
  font-size: 0.8rem;
  color: #64748b;
}

/* 浮动工具栏 */
.float-bar {
  position: fixed;
  right: 20px;
  bottom: 30px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 46px;
  height: 46px;
  background: #ffffff;
  color: var(--primary-teal);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.float-btn:hover {
  background: var(--primary-teal);
  color: #ffffff;
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .nav-container {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    padding: 16px 20px;
  }
  .nav-container.open { display: block; }
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links li a { padding: 10px 0; width: 100%; }
  .header-actions .btn-outline { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-3, .cards-grid-2, .cards-grid-4 { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .case-gallery { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .rating-banner { flex-direction: column; gap: 16px; text-align: center; }
  .rating-score-box { justify-content: center; }
}