/* ========== 全局基础变量与重置 ========== */
    :root {
      --bg-dark: #090d16;
      --bg-card: rgba(18, 24, 38, 0.85);
      --bg-card-hover: rgba(28, 38, 60, 0.95);
      --border-color: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(59, 130, 246, 0.4);
      --primary: #3b82f6;
      --primary-glow: rgba(59, 130, 246, 0.25);
      --secondary: #8b5cf6;
      --accent: #10b981;
      --warning: #f59e0b;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-sans);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      min-height: 100vh;
      background: radial-gradient(circle at 50% -20%, #1e1b4b 0%, #090d16 65%);
    }

    /* 背景网格 */
    .bg-grid {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: 0;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
      position: relative;
      z-index: 1;
    }

    /* ========== 头部导航栏 ========== */
    header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: rgba(9, 13, 22, 0.9);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.2rem;
      font-weight: 700;
      color: #fff;
    }

    .brand-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      box-shadow: 0 0 15px var(--primary-glow);
    }

    .brand-title span {
      background: linear-gradient(90deg, #60a5fa, #c084fc);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
    }

    .nav-links a {
      font-size: 0.95rem;
      color: var(--text-muted);
      transition: var(--transition);
      position: relative;
      padding: 6px 0;
    }

    .nav-links a:hover {
      color: #fff;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      transition: var(--transition);
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 9px 20px;
      border-radius: 50px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      font-size: 0.9rem;
      font-weight: 600;
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
      transition: var(--transition);
    }

    .nav-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      cursor: pointer;
      padding: 6px;
    }

    /* ========== Hero 首屏展示 ========== */
    .hero {
      padding-top: 140px;
      padding-bottom: 70px;
      text-align: center;
      position: relative;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 999px;
      background: rgba(59, 130, 246, 0.1);
      border: 1px solid rgba(59, 130, 246, 0.25);
      color: #93c5fd;
      font-size: 0.85rem;
      font-weight: 500;
      margin-bottom: 22px;
    }

    .hero h1 {
      font-size: clamp(2.1rem, 4.5vw, 3.4rem);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #ffffff;
    }

    .hero h1 .gradient-text {
      background: linear-gradient(135deg, #60a5fa 0%, #a855f7 50%, #38bdf8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: clamp(0.98rem, 1.8vw, 1.15rem);
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 50px;
      font-size: 0.98rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      box-shadow: 0 4px 20px var(--primary-glow);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-color);
      color: var(--text-main);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.2);
      transform: translateY(-2px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
      padding: 22px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      backdrop-filter: blur(12px);
    }

    .stat-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

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

    .stat-val {
      font-size: 1.65rem;
      font-weight: 800;
      margin-bottom: 4px;
      background: linear-gradient(90deg, #60a5fa, #34d399);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* ========== 通用板块与双栏展示容器 ========== */
    .project-section {
      padding: 75px 0;
      border-top: 1px solid var(--border-color);
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .tag-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
    .tag-purple { background: rgba(139, 92, 246, 0.15); color: #c084fc; border: 1px solid rgba(139, 92, 246, 0.3); }
    .tag-green { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
    .tag-orange { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }

    .section-title {
      font-size: clamp(1.7rem, 3.2vw, 2.3rem);
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 0.98rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 左图右文标准双栏卡片容器（与板块3统一） */
    .showcase-card {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 36px;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 22px;
      padding: 32px;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
      transition: var(--transition);
    }

    .showcase-card:hover {
      border-color: rgba(96, 165, 250, 0.3);
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.55);
    }

    /* 轮播图组件 */
    .slider-box {
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      background: #0f172a;
      border: 1px solid rgba(255, 255, 255, 0.12);
      aspect-ratio: 16/10;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .slider-container {
      position: relative;
      width: 100%;
      height: 100%;
      overflow: hidden;
    }

    .slide-item {
      position: absolute;
      inset: 0;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
      cursor: pointer;
    }

    .slide-item.active {
      opacity: 1;
      visibility: visible;
    }

    .slide-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: top center;
      transition: transform 0.4s ease;
    }

    .slide-item:hover img {
      transform: scale(1.03);
    }

    .slide-caption-bar {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(to top, rgba(9, 13, 22, 0.92) 0%, rgba(9, 13, 22, 0.3) 70%, transparent 100%);
      padding: 16px 20px 14px;
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      color: #fff;
      pointer-events: none;
    }

    .slide-caption-bar .caption-title {
      font-size: 0.92rem;
      font-weight: 600;
    }

    .slide-caption-bar .caption-hint {
      font-size: 0.78rem;
      color: #94a3b8;
    }

    .slider-btn {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: rgba(15, 23, 42, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.1rem;
      transition: var(--transition);
      z-index: 10;
      user-select: none;
    }

    .slider-btn:hover {
      background: rgba(59, 130, 246, 0.9);
      border-color: #60a5fa;
    }

    .slider-prev { left: 14px; }
    .slider-next { right: 14px; }

    .slider-dots {
      position: absolute;
      bottom: 12px;
      right: 18px;
      display: flex;
      gap: 6px;
      z-index: 10;
    }

    .slider-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.35);
      cursor: pointer;
      transition: var(--transition);
    }

    .slider-dot.active {
      width: 22px;
      border-radius: 10px;
      background: #60a5fa;
    }

    /* 右侧简短说明列表 */
    .showcase-info {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .info-num {
      width: 32px;
      height: 32px;
      border-radius: 9px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: 700;
      font-size: 0.92rem;
    }

    .num-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
    .num-purple { background: rgba(139, 92, 246, 0.15); color: #c084fc; }
    .num-green { background: rgba(16, 185, 129, 0.15); color: #34d399; }

    .info-content h4 {
      color: #fff;
      font-size: 1.05rem;
      margin-bottom: 3px;
      font-weight: 700;
    }

    .info-content p {
      color: var(--text-muted);
      font-size: 0.88rem;
      line-height: 1.5;
    }

    /* ========== 定制开发特色模块 ========== */
    .custom-features-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .process-timeline {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .process-step {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 18px;
      transition: var(--transition);
    }

    .process-step:hover {
      border-color: var(--border-highlight);
      transform: translateX(4px);
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      font-weight: 800;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .step-content h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 2px;
    }

    .step-content p {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .code-terminal {
      background: #0f172a;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 18px;
      overflow: hidden;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    }

    .terminal-header {
      background: #1e293b;
      padding: 12px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .dot { width: 11px; height: 11px; border-radius: 50%; }
    .dot-red { background: #ef4444; }
    .dot-yellow { background: #f59e0b; }
    .dot-green { background: #10b981; }

    .terminal-title {
      font-size: 0.8rem;
      color: #94a3b8;
      margin-left: 6px;
      font-family: monospace;
    }

    .terminal-body {
      padding: 22px;
      font-family: "Fira Code", Consolas, Monaco, monospace;
      font-size: 0.85rem;
      line-height: 1.7;
      color: #e2e8f0;
    }

    .terminal-body .comment { color: #64748b; }
    .terminal-body .keyword { color: #c084fc; font-weight: 600; }
    .terminal-body .string { color: #34d399; }
    .terminal-body .fn { color: #60a5fa; }

    /* ========== 技术优势 ========== */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .advantage-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px 20px;
      text-align: center;
      transition: var(--transition);
    }

    .advantage-card:hover {
      border-color: rgba(96, 165, 250, 0.4);
      transform: translateY(-4px);
    }

    .adv-icon-wrap {
      width: 52px;
      height: 52px;
      margin: 0 auto 16px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
      border: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #60a5fa;
    }

    .advantage-card h4 {
      font-size: 1.08rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .advantage-card p {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* ========== 联系与咨询区 ========== */
    .contact-card {
      background: linear-gradient(135deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.98) 100%);
      border: 1px solid rgba(59, 130, 246, 0.35);
      border-radius: 26px;
      padding: 55px 30px;
      text-align: center;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
      max-width: 860px;
      margin: 0 auto;
    }

    .contact-title {
      font-size: clamp(1.7rem, 3.2vw, 2.3rem);
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
    }

    .contact-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 620px;
      margin: 0 auto 32px;
      line-height: 1.6;
    }

    .tg-contact-box {
      display: inline-flex;
      align-items: center;
      gap: 16px;
      background: rgba(59, 130, 246, 0.15);
      border: 1.5px solid rgba(96, 165, 250, 0.5);
      border-radius: 50px;
      padding: 16px 36px;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 8px 25px rgba(59, 130, 246, 0.25);
    }

    .tg-contact-box:hover {
      background: rgba(59, 130, 246, 0.25);
      border-color: #60a5fa;
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(59, 130, 246, 0.4);
    }

    .tg-contact-box svg {
      width: 32px;
      height: 32px;
      fill: #38bdf8;
    }

    .tg-contact-box .tg-text {
      text-align: left;
    }

    .tg-contact-box .tg-label {
      font-size: 0.8rem;
      color: #94a3b8;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .tg-contact-box .tg-handle {
      font-size: 1.25rem;
      font-weight: 800;
      color: #fff;
    }

    .tg-copy-btn {
      background: rgba(255, 255, 255, 0.12);
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 0.8rem;
      color: #93c5fd;
      margin-left: 8px;
    }

    .contact-footer-note {
      font-size: 0.85rem;
      color: var(--text-dim);
      margin-top: 24px;
    }

    /* ========== 底部版权 Footer ========== */
    footer {
      border-top: 1px solid var(--border-color);
      padding: 35px 0 25px;
      text-align: center;
      background: #060911;
      font-size: 0.85rem;
      color: var(--text-dim);
    }

    .footer-links {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-bottom: 16px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: var(--text-muted);
      transition: var(--transition);
    }

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

    /* ========== Lightbox 图片预览模态框 ========== */
    .lightbox-modal {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 9999;
      background: rgba(0, 0, 0, 0.92);
      backdrop-filter: blur(12px);
      align-items: center;
      justify-content: center;
      padding: 20px;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .lightbox-modal.active {
      display: flex;
      opacity: 1;
    }

    .lightbox-content {
      max-width: 90vw;
      max-height: 85vh;
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .lightbox-img {
      max-width: 100%;
      max-height: 80vh;
      object-fit: contain;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
    }

    .lightbox-caption {
      margin-top: 14px;
      color: #e2e8f0;
      font-size: 0.95rem;
      text-align: center;
    }

    .lightbox-close {
      position: absolute;
      top: 24px;
      right: 28px;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.5rem;
      transition: var(--transition);
      z-index: 10001;
    }

    .lightbox-close:hover {
      background: rgba(239, 68, 68, 0.8);
    }

    .lightbox-nav {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.3rem;
      transition: var(--transition);
      user-select: none;
    }

    .lightbox-nav:hover {
      background: rgba(59, 130, 246, 0.8);
    }

    .lightbox-prev { left: 24px; }
    .lightbox-next { right: 24px; }

    /* Toast 复制提示 */
    .toast {
      position: fixed;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%) translateY(100px);
      background: #10b981;
      color: #fff;
      padding: 12px 28px;
      border-radius: 50px;
      font-size: 0.95rem;
      font-weight: 600;
      box-shadow: 0 10px 25px rgba(16, 185, 129, 0.4);
      z-index: 10000;
      opacity: 0;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      pointer-events: none;
    }

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

    /* ========== 移动端响应式适配 ========== */
    @media (max-width: 1024px) {
      .showcase-card {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .custom-features-wrapper {
        grid-template-columns: 1fr;
      }
      .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #090d16;
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
      }

      .nav-links.open { display: flex; }
      .menu-toggle { display: block; }
      .nav-btn { display: none; }

      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px 8px;
      }

      .stat-item:nth-child(2) {
        border-right: none;
      }

      .showcase-card {
        padding: 20px;
      }

      .advantages-grid {
        grid-template-columns: 1fr;
      }

      .contact-card {
        padding: 35px 18px;
      }

      .tg-contact-box {
        padding: 14px 24px;
        width: 100%;
        justify-content: center;
      }

      .lightbox-nav { display: none; }
    }