/* roulang page: index */
:root {
      --primary-bg: #0A0E27;
      --deep-bg: #060A1C;
      --cyan: #00E5FF;
      --purple: #7B2FFF;
      --card-surface: rgba(255,255,255,0.04);
      --card-border: rgba(255,255,255,0.08);
      --text-primary: #E0E6F0;
      --text-secondary: #8892B0;
      --white: #ffffff;
      --radius-xs: 8px;
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-glow: 0 0 20px rgba(0,229,255,0.4);
      --shadow-glow-hover: 0 0 40px rgba(0,229,255,0.6);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-mono: 'Inter', 'SF Pro Display', sans-serif;
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --max-width: 1200px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      margin: 0;
      background-color: var(--primary-bg);
      font-family: var(--font-sans);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      background-image: 
        linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
      background-size: 60px 60px;
      position: relative;
    }
    
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(10,14,39,0.8);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      transition: var(--transition-smooth);
    }
    
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 24px;
      max-width: var(--max-width);
      margin: 0 auto;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 22px;
      color: var(--white);
      text-decoration: none;
      letter-spacing: -0.3px;
    }
    
    .logo-icon {
      width: 20px;
      height: 20px;
      background: var(--cyan);
      transform: rotate(45deg);
      border-radius: 2px;
      box-shadow: 0 0 12px var(--cyan);
    }
    
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
      margin: 0;
    }
    
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 15px;
      transition: var(--transition-smooth);
      position: relative;
      padding-bottom: 4px;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--cyan);
    }
    
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--cyan);
      box-shadow: 0 0 8px var(--cyan);
    }
    
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    
    .search-icon {
      color: var(--text-secondary);
      font-size: 18px;
      cursor: default;
    }
    
    .login-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 14px;
      border: 1px solid rgba(255,255,255,0.2);
      padding: 6px 16px;
      border-radius: var(--radius-xs);
      transition: var(--transition-smooth);
    }
    
    .login-link:hover {
      border-color: var(--cyan);
      color: var(--cyan);
      background: rgba(0,229,255,0.05);
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--cyan), var(--purple));
      color: white;
      font-weight: 600;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-xs);
      cursor: pointer;
      box-shadow: var(--shadow-glow);
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
      font-size: 15px;
    }
    
    .btn-primary:hover {
      box-shadow: var(--shadow-glow-hover);
      transform: scale(1.04);
      color: white;
    }
    
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(0,229,255,0.5);
      color: var(--cyan);
      font-weight: 500;
      padding: 10px 24px;
      border-radius: var(--radius-xs);
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
      font-size: 15px;
    }
    
    .btn-ghost:hover {
      background: rgba(0,229,255,0.1);
      border-color: var(--cyan);
      color: var(--cyan);
    }
    
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--text-primary);
      background: none;
      border: none;
      cursor: pointer;
    }
    
    /* Hero */
    .hero-section {
      padding: 160px 0 120px;
      background: radial-gradient(circle at 30% 50%, rgba(123,47,255,0.18) 0%, transparent 60%);
      position: relative;
    }
    
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    
    .hero-left {
      flex: 5;
    }
    
    .hero-right {
      flex: 7;
      position: relative;
    }
    
    .hero-title {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      color: var(--white);
    }
    
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 36px;
      max-width: 500px;
    }
    
    .hero-cta {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .hero-visual {
      background: rgba(255,255,255,0.02);
      border-radius: 24px;
      height: 400px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.05);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }
    
    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 60% 40%, rgba(0,229,255,0.25) 0%, transparent 70%);
    }
    
    .scroll-indicator {
      text-align: center;
      margin-top: 40px;
      color: var(--text-secondary);
      font-size: 14px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }
    
    /* 通用板块 */
    .section {
      padding: 120px 0;
    }
    
    .section-title {
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 48px;
      color: var(--white);
      letter-spacing: -0.3px;
    }
    
    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .highlight-card {
      background: var(--card-surface);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    
    .highlight-card:hover {
      box-shadow: 0 16px 48px rgba(0,229,255,0.15);
      transform: translateY(-4px);
    }
    
    .highlight-card.large {
      grid-column: span 2;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    
    .big-number {
      font-size: 56px;
      font-weight: 700;
      font-family: var(--font-mono);
      background: linear-gradient(135deg, var(--cyan), var(--purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .card-icon {
      font-size: 32px;
      color: var(--cyan);
      margin-bottom: 20px;
    }
    
    /* 案例瀑布流 */
    .masonry {
      columns: 3;
      column-gap: 20px;
    }
    
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 20px;
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition-smooth);
      border: 1px solid transparent;
    }
    
    .masonry-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
      border-color: rgba(0,229,255,0.2);
    }
    
    .masonry-img {
      width: 100%;
      display: block;
      height: auto;
      background-color: #1a1f3a;
    }
    
    .masonry-info {
      padding: 16px;
    }
    
    .tag {
      display: inline-block;
      background: rgba(123,47,255,0.2);
      color: var(--purple);
      font-size: 13px;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      margin-right: 8px;
      font-weight: 500;
    }
    
    /* 对比表 */
    .compare-row {
      display: flex;
      gap: 24px;
    }
    
    .compare-col {
      flex: 1;
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-md);
      padding: 40px 32px;
      border: 1px solid rgba(255,255,255,0.05);
      transition: var(--transition-smooth);
      position: relative;
    }
    
    .compare-col.recommended {
      background: rgba(0,229,255,0.05);
      border-color: rgba(0,229,255,0.2);
    }
    
    .badge {
      background: var(--cyan);
      color: #0A0E27;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 14px;
      display: inline-block;
      margin-bottom: 18px;
    }
    
    .feature-list {
      list-style: none;
      padding: 0;
      margin: 24px 0;
    }
    
    .feature-list li {
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    
    /* FAQ */
    .faq-layout {
      display: flex;
      gap: 48px;
    }
    
    .faq-categories {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    
    .faq-cat {
      color: var(--text-secondary);
      cursor: pointer;
      font-weight: 500;
      padding-left: 12px;
      border-left: 2px solid transparent;
      transition: var(--transition-smooth);
    }
    
    .faq-cat.active {
      color: var(--white);
      border-left-color: var(--cyan);
    }
    
    .faq-list {
      flex: 2;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    
    .faq-item {
      background: var(--card-surface);
      backdrop-filter: blur(20px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      cursor: pointer;
    }
    
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
    }
    
    /* CTA Banner */
    .cta-banner {
      background: linear-gradient(135deg, var(--cyan), var(--purple));
      padding: 80px 0;
      text-align: center;
      position: relative;
      background-image: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
      background-size: 30px 30px;
    }
    
    .btn-white {
      background: white;
      color: #0A0E27;
      font-weight: 700;
      padding: 16px 40px;
      border-radius: var(--radius-xs);
      font-size: 18px;
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
    }
    
    .btn-white:hover {
      background: transparent;
      color: white;
      box-shadow: 0 0 24px white;
      border: 1px solid white;
    }
    
    /* 页脚 */
    .site-footer {
      background: #060A1C;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
    }
    
    .footer-links a {
      color: var(--text-secondary);
      display: block;
      margin-bottom: 10px;
      text-decoration: none;
    }
    
    .footer-links a:hover {
      color: var(--cyan);
    }
    
    .subscribe-input {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      padding: 12px;
      border-radius: var(--radius-xs);
      color: white;
      width: 100%;
      margin-bottom: 12px;
    }
    
    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .masonry {
        columns: 2;
      }
      .highlights-grid {
        grid-template-columns: 1fr 1fr;
      }
      .highlight-card.large {
        grid-column: span 2;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    
    @media (max-width: 640px) {
      .nav-links, .nav-actions .search-icon, .nav-actions .login-link {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .section {
        padding: 80px 0;
      }
      .highlights-grid {
        grid-template-columns: 1fr;
      }
      .highlight-card.large {
        grid-column: span 1;
      }
      .masonry {
        columns: 1;
      }
      .compare-row {
        flex-direction: column;
      }
      .faq-layout {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }