:root {
  --bg-main: #f5f8ff;
  --bg-card: #ffffff;
  --bg-card-alt: #f0f4fd;
  --text-main: #131b2e;
  --text-sub: #4b5876;
  --text-muted: #7c8ba8;
  --neon-cyan: #00e5ff;
  --neon-purple: #9d4edd;
  --neon-pink: #ff007f;
  --neon-lime: #10b981;
  --neon-blue: #2563eb;
  --neon-gradient: linear-gradient(135deg, #00e5ff 0%, #7928ca 50%, #ff007f 100%);
  --glow-shadow: 0 8px 30px rgba(0, 229, 255, 0.18);
  --glow-pink: 0 8px 30px rgba(255, 0, 127, 0.15);
  --border-color: rgba(37, 99, 235, 0.12);
  --border-focus: rgba(0, 229, 255, 0.6);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --container-max: 1200px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
  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-main);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  background: radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 90% 60%, rgba(255, 0, 127, 0.06) 0%, transparent 45%),
              radial-gradient(circle at 50% 90%, rgba(157, 78, 221, 0.08) 0%, transparent 50%),
              #f5f8ff;
  background-attachment: fixed;
  color: var(--text-main);
  overflow-x: hidden;
}

.ai-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.2);
  box-shadow: 0 4px 20px rgba(19, 27, 46, 0.04);
}

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

.brand-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-area .ai-page-logo {
  max-height: 38px;
  width: auto;
  display: block;
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--neon-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: #131b2e;
}

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

.nav-links li a {
  display: inline-block;
  padding: 8px 12px;
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links li a:hover {
  color: var(--neon-blue);
  background: rgba(0, 229, 255, 0.1);
}

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

.btn-primary-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  background: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 30px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 210, 255, 0.4);
  transition: var(--transition);
}

.btn-primary-neon:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 210, 255, 0.6);
  color: #ffffff;
}

.btn-glow-pink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  background: linear-gradient(135deg, #ff007f 0%, #7928ca 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 30px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(255, 0, 127, 0.35);
  transition: var(--transition);
}

.btn-glow-pink:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 0, 127, 0.55);
  color: #ffffff;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
}

/* 主屏 Hero（纯科技感排版，无图片） */
.hero-section {
  padding: 70px 0 50px;
  position: relative;
}

.hero-inner {
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--neon-blue);
  margin-bottom: 24px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--neon-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--neon-cyan);
  display: inline-block;
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 2.6rem;
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: var(--text-main);
}

.hero-title .glow-highlight {
  background: linear-gradient(120deg, #0070f3, #7928ca 50%, #ff0080);
  -webkit-background-clip: text;
  background-clip: text;
  color: #131b2e;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-cta-group .btn-hero-official {
  padding: 14px 34px;
  font-size: 1.05rem;
  border-radius: 40px;
  background: linear-gradient(135deg, #00e5ff 0%, #0070f3 50%, #7928ca 100%);
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 8px 30px rgba(0, 112, 243, 0.4);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-cta-group .btn-hero-official:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 35px rgba(0, 112, 243, 0.6);
  color: #ffffff;
}

.hero-cta-group .btn-hero-sub {
  padding: 14px 28px;
  font-size: 1.02rem;
  border-radius: 40px;
  background: #ffffff;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  border: 1px solid rgba(37, 99, 235, 0.2);
  box-shadow: 0 4px 15px rgba(19, 27, 46, 0.05);
  transition: var(--transition);
}

.hero-cta-group .btn-hero-sub:hover {
  background: rgba(0, 229, 255, 0.06);
  border-color: var(--neon-cyan);
  transform: translateY(-2px);
}

/* 核心指标卡片 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.stat-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 20px 16px;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 20px rgba(19, 27, 46, 0.04);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-box:hover {
  transform: translateY(-4px);
  border-color: var(--neon-cyan);
  box-shadow: var(--glow-shadow);
}

.stat-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--neon-gradient);
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--neon-blue);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-top: 6px;
  font-weight: 500;
}

/* 通用板块外框与标题 */
.section-block {
  padding: 60px 0;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--neon-purple);
  background: rgba(157, 78, 221, 0.1);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1rem;
  color: var(--text-sub);
}

/* 标签云模型矩阵 */
.model-tags-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.model-tag-item {
  background: #ffffff;
  border: 1px solid rgba(0, 229, 255, 0.25);
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  box-shadow: 0 2px 10px rgba(19, 27, 46, 0.03);
  transition: var(--transition);
}

.model-tag-item:hover {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(255, 0, 127, 0.15));
  border-color: var(--neon-pink);
  transform: translateY(-2px);
}

/* 服务与场景卡片网格 */
.grid-cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

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

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

.feature-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;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.5);
  box-shadow: 0 10px 25px rgba(0, 229, 255, 0.12);
}

.card-icon-neon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(121, 40, 202, 0.15));
  border: 1px solid rgba(0, 229, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--neon-blue);
  margin-bottom: 16px;
}

.card-title-lg {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.card-desc-txt {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

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

.card-pill {
  font-size: 0.76rem;
  background: var(--bg-card-alt);
  color: var(--neon-blue);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 500;
}

/* 媒体图片展示区 */
.media-gallery-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
  margin-top: 30px;
  align-items: center;
}

.media-image-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 25px rgba(19, 27, 46, 0.06);
  background: #ffffff;
}

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

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

/* 对比评测卡片与表格 */
.eval-card-main {
  background: #ffffff;
  border: 2px solid rgba(0, 229, 255, 0.4);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--glow-shadow);
  margin-bottom: 30px;
}

.eval-header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(37, 99, 235, 0.1);
}

.score-badge-neon {
  display: flex;
  align-items: center;
  gap: 16px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(255, 0, 127, 0.1));
  padding: 12px 24px;
  border-radius: 40px;
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.score-num-big {
  font-size: 2.2rem;
  font-weight: 900;
  color: #ff007f;
  line-height: 1;
}

.score-stars-txt {
  font-size: 1.1rem;
  color: #f59e0b;
  font-weight: 700;
}

.table-responsive-wrapper {
  overflow-x: auto;
  margin-top: 20px;
}

.custom-compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.custom-compare-table th, 
.custom-compare-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
  font-size: 0.92rem;
}

.custom-compare-table th {
  background: rgba(0, 229, 255, 0.06);
  font-weight: 700;
  color: var(--text-main);
}

.custom-compare-table tr:hover td {
  background: rgba(0, 229, 255, 0.03);
}

.cell-highlight {
  font-weight: 700;
  color: var(--neon-blue);
}

/* 流程步骤 */
.steps-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

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

.step-num-badge {
  position: absolute;
  top: -12px;
  left: 20px;
  background: linear-gradient(135deg, #00e5ff, #2563eb);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 229, 255, 0.3);
}

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

.review-item-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: 0 4px 18px rgba(19, 27, 46, 0.03);
  display: flex;
  flex-direction: column;
}

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

.avatar-badge {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #7928ca, #ff0080);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.user-meta .user-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.user-meta .user-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.review-text-content {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.6;
  flex-grow: 1;
}

/* FAQ 折叠面板 */
.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-question-btn {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon-arrow {
  transition: transform 0.3s ease;
  font-weight: 800;
  color: var(--neon-blue);
}

.faq-item-box.active .faq-icon-arrow {
  transform: rotate(180deg);
}

.faq-answer-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 20px;
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.6;
}

.faq-item-box.active .faq-answer-body {
  max-height: 250px;
  padding-bottom: 16px;
}

/* 表单与联系区 */
.contact-layout-flex {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  align-items: start;
}

.contact-form-box {
  background: #ffffff;
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.08);
}

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

.form-group-item label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control-input, 
.form-control-select, 
.form-control-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  outline: none;
  background: #fbfdff;
  color: var(--text-main);
  transition: var(--transition);
}

.form-control-input:focus, 
.form-control-select:focus, 
.form-control-textarea:focus {
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2);
  background: #ffffff;
}

.contact-info-panel {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.qr-code-wrapper {
  text-align: center;
  padding: 18px;
  background: var(--bg-card-alt);
  border-radius: var(--radius-md);
  margin-top: 20px;
}

.qr-code-wrapper img {
  max-width: 140px;
  height: auto;
  border-radius: 8px;
  border: 1px solid rgba(0, 229, 255, 0.3);
}

/* 最新文章与友情链接 */
.articles-list-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-row-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}

.article-row-link:hover {
  border-color: var(--neon-blue);
  background: rgba(0, 229, 255, 0.05);
  transform: translateX(4px);
}

.friend-links-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding-top: 14px;
}

.friend-links-bar a {
  display: inline-block;
  padding: 6px 14px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.friend-links-bar a:hover {
  color: var(--neon-blue);
  border-color: var(--neon-cyan);
}

/* 底部 Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid rgba(37, 99, 235, 0.15);
  padding: 40px 0 25px;
  margin-top: 40px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 30px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
}

.footer-brand h4 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-main);
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: var(--text-sub);
}

.footer-bottom-copy {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-top: 20px;
}

/* 浮动客服条 */
.floating-dock {
  position: fixed;
  right: 20px;
  bottom: 25px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dock-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(0, 229, 255, 0.4);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-blue);
  text-decoration: none;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
}

.dock-btn:hover {
  background: var(--neon-blue);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 229, 255, 0.5);
  transform: translateY(-3px);
}

/* 响应式样式处理 */
@media (max-width: 992px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-cards-3, .grid-cards-4, .reviews-grid, .steps-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .media-gallery-grid {
    grid-template-columns: 1fr;
  }
  .contact-layout-flex {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 1.9rem;
  }
  .grid-cards-3, .grid-cards-4, .grid-cards-2, .reviews-grid, .steps-container {
    grid-template-columns: 1fr;
  }
  .hero-stats-grid {
    grid-template-columns: 1fr;
  }
}