/* roulang page: index */
:root {
      --deep-purple: #2D1B4E;
      --electric-orange: #FF6B35;
      --carbon-black: #1A1A1A;
      --moonlight-silver: #E8E8EC;
      --soft-purple-bg: #F8F7FC;
      --white: #FFFFFF;
      --gradient-primary: linear-gradient(135deg, #2D1B4E 0%, #8A4B9A 40%, #FF6B35 100%);
      --gradient-text: linear-gradient(135deg, #2D1B4E, #FF6B35);
      --shadow-card: 0 20px 40px -12px rgba(0,0,0,0.15);
      --shadow-hover: 0 30px 50px -15px rgba(45,27,78,0.25);
      --border-radius-lg: 24px;
      --border-radius-md: 16px;
      --border-radius-sm: 12px;
      --transition: all 0.25s ease;
      --font-heading: 'Segoe UI', '思源黑体', '阿里巴巴普惠体', system-ui, -apple-system, sans-serif;
      --font-body: 'Segoe UI', '思源黑体', system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--soft-purple-bg);
      color: var(--carbon-black);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 浮动Dock导航 */
    .dock-nav {
      position: fixed;
      top: 24px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 99;
      width: auto;
      max-width: 95vw;
      background: rgba(26, 26, 26, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: 40px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      box-shadow: 0 12px 24px rgba(0,0,0,0.2);
      transition: var(--transition);
    }
    .dock-nav.scrolled {
      background: rgba(26, 26, 26, 0.9);
      box-shadow: 0 16px 32px rgba(0,0,0,0.3);
    }
    .dock-logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.5rem;
      background: var(--gradient-text);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
      margin-right: 8px;
    }
    .dock-links {
      display: flex;
      align-items: center;
      gap: 20px;
      list-style: none;
      margin: 0;
    }
    .dock-links a {
      color: var(--moonlight-silver);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 4px;
      position: relative;
    }
    .dock-links a:hover,
    .dock-links a.active {
      color: var(--electric-orange);
    }
    .dock-cta {
      background: var(--electric-orange);
      color: white !important;
      padding: 10px 20px !important;
      border-radius: 30px;
      font-weight: 600;
      box-shadow: 0 8px 16px rgba(255,107,53,0.3);
    }
    .dock-cta:hover {
      background: #e55a2b;
      transform: translateY(-2px);
      box-shadow: 0 12px 20px rgba(255,107,53,0.4);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    /* 首屏Hero */
    #hero {
      padding: 160px 0 120px;
      background-color: var(--white);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-left h1 {
      font-size: 4.2rem;
      line-height: 1.15;
      background: var(--gradient-text);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 24px;
      font-weight: 800;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: #4a4a5a;
      margin-bottom: 36px;
      max-width: 90%;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--electric-orange);
      color: white;
      font-weight: 600;
      padding: 16px 36px;
      border-radius: var(--border-radius-sm);
      display: inline-block;
      transition: var(--transition);
      border: none;
      box-shadow: 0 10px 20px rgba(255,107,53,0.3);
    }
    .btn-primary:hover {
      background: #d4521f;
      transform: translateY(-3px);
      box-shadow: 0 20px 30px rgba(255,107,53,0.4);
      color: white;
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--carbon-black);
      color: var(--carbon-black);
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--border-radius-sm);
      transition: var(--transition);
    }
    .btn-secondary:hover {
      background: rgba(0,0,0,0.04);
      border-color: var(--electric-orange);
      color: var(--electric-orange);
    }
    .hero-right {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .hero-img {
      width: 100%;
      border-radius: 40px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 400px;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }
    .data-badge {
      position: absolute;
      bottom: 20px;
      right: -10px;
      background: var(--electric-orange);
      color: white;
      padding: 8px 22px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.9rem;
      box-shadow: 0 10px 15px rgba(0,0,0,0.2);
      transform: rotate(2deg);
      white-space: nowrap;
    }
    /* 愿景 */
    #vision {
      background: var(--carbon-black);
      padding: 100px 0;
      text-align: center;
      position: relative;
      background-image: radial-gradient(circle at 30% 40%, rgba(138,75,154,0.2) 0%, transparent 60%);
    }
    .vision-title {
      font-size: 2.8rem;
      color: white;
      margin-bottom: 24px;
    }
    .vision-text {
      font-size: 1.2rem;
      color: var(--moonlight-silver);
      max-width: 700px;
      margin: 0 auto;
    }
    /* 解决方案卡片 */
    #solutions {
      padding: 100px 0;
      background: var(--soft-purple-bg);
    }
    .section-title {
      font-size: 2.4rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 48px;
    }
    .solution-card {
      background: white;
      border-radius: var(--border-radius-lg);
      padding: 40px 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
      border-left: 6px solid;
      border-image: var(--gradient-primary) 1;
    }
    .solution-card:hover {
      transform: translateY(-10px);
      box-shadow: var(--shadow-hover);
    }
    .solution-icon {
      font-size: 2.2rem;
      background: var(--gradient-text);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 20px;
    }
    .badge-stat {
      background: #2D1B4E;
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
      display: inline-block;
      margin-top: 16px;
    }
    /* 案例瀑布流 */
    #cases {
      padding: 100px 0;
      background: white;
    }
    .cases-masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .case-card {
      background: white;
      border-radius: var(--border-radius-md);
      overflow: hidden;
      box-shadow: 0 8px 24px rgba(0,0,0,0.08);
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .case-card:hover img {
      transform: scale(1.04);
    }
    .case-content {
      padding: 20px;
    }
    /* 对比表 */
    #compare {
      padding: 100px 0;
      background: var(--soft-purple-bg);
    }
    .compare-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .compare-card {
      background: white;
      border-radius: var(--border-radius-lg);
      padding: 36px 24px;
      box-shadow: var(--shadow-card);
      text-align: center;
    }
    .compare-card.highlight {
      border: 3px solid var(--electric-orange);
      transform: scale(1.03);
    }
    /* FAQ */
    #faq {
      padding: 100px 0;
      background: white;
    }
    .accordion-item {
      background: var(--moonlight-silver);
      border-radius: var(--border-radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .accordion-title {
      padding: 20px 28px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: transparent;
      border: none;
      width: 100%;
      font-size: 1.1rem;
    }
    .accordion-content {
      padding: 0 28px 24px;
      display: none;
      background: white;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    /* CTA */
    #cta {
      background: var(--gradient-primary);
      padding: 100px 0;
      text-align: center;
    }
    /* 页脚 */
    #footer {
      background: var(--carbon-black);
      color: var(--moonlight-silver);
      padding: 60px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    @media (max-width: 1024px) {
      .solutions-grid, .cases-masonry, .compare-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-left h1 {
        font-size: 3.4rem;
      }
    }
    @media (max-width: 768px) {
      .dock-nav {
        bottom: 16px;
        top: auto;
        width: 92%;
        border-radius: 32px;
        padding: 8px 20px;
        background: rgba(26,26,26,0.9);
      }
      .dock-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .solutions-grid, .cases-masonry, .compare-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-left h1 {
        font-size: 2.8rem;
      }
    }