:root {
  --primary: #ff5500;
  --primary-hover: #e04b00;
  --primary-light: #fff2eb;
  --primary-gradient: linear-gradient(135deg, #ff6b22 0%, #ff3b00 100%);
  --accent-gold: #ff9800;
  --dark-main: #1e2229;
  --dark-sub: #4b5563;
  --dark-light: #6b7280;
  --bg-main: #fcfbfa;
  --bg-card: #ffffff;
  --bg-alt: #f7f5f2;
  --border-color: #f0e6df;
  --border-focus: #ff7733;
  --shadow-sm: 0 2px 8px rgba(255, 85, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(255, 85, 0, 0.08);
  --shadow-lg: 0 16px 36px rgba(255, 85, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: all 0.28s ease;
}

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

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

body {
  background: radial-gradient(circle at 50% 0%, rgba(255, 107, 34, 0.05) 0%, transparent 60%), var(--bg-main);
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部导航 */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

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

.brand-box img {
  height: 38px;
  width: auto;
  display: block;
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--dark-main);
  letter-spacing: -0.5px;
}

.brand-text span {
  color: var(--primary);
}

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

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

.nav-links li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--dark-sub);
  text-decoration: none;
  transition: var(--transition);
  border-radius: var(--radius-sm);
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(255, 85, 0, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #ff7a38 0%, #eb3600 100%);
  box-shadow: 0 6px 18px rgba(255, 85, 0, 0.38);
  transform: translateY(-1px);
}

.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}

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

.btn-lg {
  padding: 13px 28px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--dark-main);
  cursor: pointer;
}

/* Hero 首屏 - 纯色/几何/文字/卡片，严格无图片 */
.hero-section {
  padding: 70px 0 60px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255, 242, 235, 0.6) 0%, rgba(252, 251, 250, 1) 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 40px;
  line-height: 1.25;
  font-weight: 900;
  color: var(--dark-main);
  margin-bottom: 18px;
  letter-spacing: -0.8px;
}

.hero-title span {
  color: var(--primary);
}

.hero-desc {
  font-size: 16px;
  color: var(--dark-sub);
  line-height: 1.7;
  margin-bottom: 30px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-highlights {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  color: var(--dark-light);
}

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

.hero-highlights span::before {
  content: "✓";
  color: var(--primary);
  font-weight: 800;
}

/* 首屏右侧数据科技卡片 */
.hero-card-board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  position: relative;
}

.hero-card-board::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 20%;
  right: 20%;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: 3px;
}

.board-item {
  padding: 16px;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 85, 0, 0.08);
}

.board-item h4 {
  font-size: 13px;
  color: var(--dark-light);
  margin-bottom: 8px;
}

.board-item .board-num {
  font-size: 26px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

.board-item p {
  font-size: 12px;
  color: var(--dark-sub);
}

.board-full {
  grid-column: span 2;
  background: linear-gradient(135deg, #fff7f2 0%, #ffffff 100%);
  border: 1px dashed var(--primary);
  padding: 16px;
  border-radius: var(--radius-md);
}

.model-tags-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.model-tag {
  font-size: 11px;
  padding: 3px 8px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--dark-sub);
  font-weight: 500;
}

/* 全局区块通用样式 */
.section {
  padding: 70px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-alt);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 46px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--dark-main);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 15px;
  color: var(--dark-sub);
  line-height: 1.6;
}

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

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 85, 0, 0.3);
}

.card-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 16px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark-main);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 14px;
  color: var(--dark-sub);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.card-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.badge-item {
  font-size: 12px;
  background: var(--bg-alt);
  color: var(--dark-light);
  padding: 2px 8px;
  border-radius: 4px;
}

/* 平台能力与全链路矩阵 */
.scene-card {
  border-top: 3px solid transparent;
}

.scene-card:hover {
  border-top-color: var(--primary);
}

.scene-header-inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.scene-category {
  font-size: 11px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: 600;
}

/* 步骤流程 */
.flow-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.flow-step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  position: relative;
}

.step-num {
  font-size: 28px;
  font-weight: 900;
  color: rgba(255, 85, 0, 0.2);
  line-height: 1;
  margin-bottom: 12px;
}

.flow-step-card h3 {
  font-size: 16px;
  color: var(--dark-main);
  margin-bottom: 8px;
}

.flow-step-card p {
  font-size: 13px;
  color: var(--dark-sub);
  line-height: 1.6;
}

/* 对比评测表格与评分卡 */
.eval-card-top {
  background: linear-gradient(135deg, #ffffff 0%, #fff6f0 100%);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 24px 30px;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.eval-score-box {
  display: flex;
  align-items: center;
  gap: 20px;
}

.score-big {
  font-size: 48px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}

.stars {
  color: #ff9800;
  font-size: 20px;
  letter-spacing: 2px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #ffffff;
}

.eval-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.eval-table th, .eval-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.eval-table th {
  background: var(--bg-alt);
  color: var(--dark-main);
  font-weight: 700;
}

.eval-table tr:last-child td {
  border-bottom: none;
}

.eval-table .highlight-col {
  background: rgba(255, 85, 0, 0.03);
  font-weight: 600;
  color: var(--primary);
}

.check-ok {
  color: #00b050;
  font-weight: 800;
}

.check-no {
  color: #a0a0a0;
}

/* 媒体展示与图文案例 */
.media-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}

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

.media-box img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.media-box:hover img {
  transform: scale(1.02);
}

.media-content {
  padding: 20px;
}

.media-content h3 {
  font-size: 18px;
  color: var(--dark-main);
  margin-bottom: 8px;
}

.media-content p {
  font-size: 14px;
  color: var(--dark-sub);
}

/* 用户评价 6条 */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

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

.avatar-circle {
  width: 42px;
  height: 42px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
}

.user-meta h4 {
  font-size: 15px;
  color: var(--dark-main);
}

.user-meta span {
  font-size: 12px;
  color: var(--dark-light);
}

.review-text {
  font-size: 13px;
  color: var(--dark-sub);
  line-height: 1.6;
  flex-grow: 1;
}

/* FAQ 折叠面板 */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--dark-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

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

.faq-icon {
  font-size: 18px;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.28s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background: #faf8f5;
  border-top: 1px solid transparent;
}

.faq-answer-content {
  padding: 16px 24px;
  font-size: 14px;
  color: var(--dark-sub);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  border-top-color: var(--border-color);
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
}

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

/* 需求表单与联系我们 */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
}

.form-box {
  background: #ffffff;
  padding: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--dark-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-main);
  color: var(--dark-main);
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--border-focus);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.1);
}

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

.contact-info-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.info-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}

.info-text h4 {
  font-size: 15px;
  color: var(--dark-main);
  margin-bottom: 2px;
}

.info-text p, .info-text a {
  font-size: 14px;
  color: var(--dark-sub);
  text-decoration: none;
}

.info-text a:hover {
  color: var(--primary);
}

.qr-code-zone {
  margin-top: 10px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  gap: 16px;
}

.qr-code-zone img {
  width: 90px;
  height: 90px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* 最新文章与资讯 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.article-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  text-decoration: none;
  display: block;
  transition: var(--transition);
}

.article-item:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.article-item h4 {
  font-size: 15px;
  color: var(--dark-main);
  margin-bottom: 8px;
  line-height: 1.4;
}

.article-item p {
  font-size: 13px;
  color: var(--dark-light);
}

/* 友情链接与页脚 */
.footer {
  background-color: #1a1d24;
  color: #e5e7eb;
  padding: 50px 0 24px;
  border-top: 1px solid #2d333f;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid #2d333f;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 16px;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
}

.footer-col p {
  font-size: 13px;
  color: #9ca3af;
  line-height: 1.7;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: #9ca3af;
  text-decoration: none;
  font-size: 13px;
  transition: var(--transition);
}

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

.friend-links-box {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed #2d333f;
}

.friend-links-box h5 {
  font-size: 13px;
  color: #9ca3af;
  margin-bottom: 10px;
}

.friend-links-flex {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.friend-links-flex a {
  font-size: 12px;
  color: #6b7280;
  text-decoration: none;
  transition: var(--transition);
}

.friend-links-flex a:hover {
  color: #ffffff;
}

.footer-bottom {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: #6b7280;
}

/* 浮动客服 */
.floating-bar {
  position: fixed;
  right: 20px;
  bottom: 40px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 46px;
  height: 46px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-main);
  text-decoration: none;
  box-shadow: var(--shadow-md);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}

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

/* 响应式断点 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .grid-4, .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .review-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
    box-shadow: var(--shadow-md);
  }
  .nav-menu.active {
    display: block;
  }
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links li a {
    padding: 10px 0;
  }
  .nav-actions {
    display: none;
  }
  .hero-title {
    font-size: 28px;
  }
  .grid-4, .grid-3, .grid-2, .media-container {
    grid-template-columns: 1fr;
  }
  .flow-container {
    grid-template-columns: 1fr;
  }
  .eval-card-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}