/* roulang page: index */
:root {
      --primary: #FF4D2E;
      --primary-dark: #E63E1C;
      --secondary-deep: #6C2BD9;
      --secondary-glow: #8B5CF6;
      --accent-cyan: #00F0FF;
      --neutral-dark: #1A1A2E;
      --neutral-mid: #2D2D44;
      --gray-light: #F5F5F7;
      --white: #FFFFFF;
      --text-main: #1E1E2F;
      --text-soft: #5B5B6C;
      --text-on-dark: #E0E0F0;
      --border-light: rgba(0,0,0,0.05);
      --shadow-card: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-hover: 0 18px 36px rgba(0,0,0,0.12);
      --radius-lg: 20px;
      --radius-xl: 28px;
      --radius-full: 50px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--neutral-dark);
      backdrop-filter: blur(12px);
      height: 72px;
      display: flex;
      align-items: center;
      z-index: 50;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      transition: var(--transition-smooth);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 26px;
      font-weight: 800;
      color: white;
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: 1px;
    }
    .logo .haha {
      color: var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      font-weight: 500;
      font-size: 15px;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: white;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--accent-cyan);
      border-radius: 3px;
      transition: width 0.3s ease;
      box-shadow: 0 0 12px var(--accent-cyan);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .btn-primary-nav {
      background: linear-gradient(135deg, var(--primary) 0%, #FF8C42 100%);
      border: none;
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      text-decoration: none;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(255,77,46,0.4);
    }
    .btn-primary-nav:hover {
      transform: scale(1.05);
      box-shadow: 0 8px 20px rgba(255,77,46,0.6);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: white;
      border-radius: 4px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: var(--neutral-dark);
      flex-direction: column;
      padding: 32px 24px;
      gap: 24px;
      z-index: 49;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .mobile-menu a {
      color: white;
      font-size: 18px;
      font-weight: 500;
      text-decoration: none;
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .mobile-menu.active { display: flex; }
    }
    /* Hero */
    .hero {
      min-height: 95vh;
      background: radial-gradient(circle at 20% 30%, #2D1B3A, #0F0F1A 80%);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      padding-top: 72px;
    }
    .hero::before {
      content: '';
      position: absolute;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(255,77,46,0.25) 0%, transparent 70%);
      top: -100px;
      right: -100px;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 800px;
      color: white;
    }
    .hero h1 {
      font-size: 56px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero .sub {
      font-size: 20px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-glass {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(10px);
      border: 2px solid rgba(255,255,255,0.4);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-full);
      font-weight: 600;
      text-decoration: none;
      transition: 0.3s;
    }
    .btn-glass:hover {
      background: white;
      color: var(--neutral-dark);
    }
    .stats-badge-row {
      display: flex;
      justify-content: center;
      gap: 48px;
      margin-top: 48px;
      flex-wrap: wrap;
    }
    .stat-item {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: 20px;
      padding: 16px 28px;
      color: white;
      border: 1px solid rgba(255,255,255,0.15);
    }
    .stat-number {
      font-size: 40px;
      font-weight: 800;
      color: var(--accent-cyan);
      text-shadow: 0 0 15px var(--accent-cyan);
    }
    @media (max-width: 768px) {
      .hero h1 { font-size: 36px; }
      .hero-buttons { flex-direction: column; align-items: center; }
    }
    /* 区块通用 */
    .section {
      padding: 90px 0;
    }
    .section-dark {
      background: #F5F5F7;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
    }
    .section-desc {
      text-align: center;
      color: var(--text-soft);
      max-width: 600px;
      margin: 0 auto 48px;
    }
    /* 痛点解决方案 */
    .pain-grid {
      display: flex;
      gap: 48px;
      align-items: center;
      flex-wrap: wrap;
    }
    .pain-left, .solution-right {
      flex: 1;
      min-width: 280px;
    }
    .pain-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }
    .icon-cross {
      color: var(--primary);
      font-weight: bold;
    }
    /* 服务卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 20px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      border: 1px solid transparent;
      background-clip: padding-box;
      position: relative;
    }
    .service-card::before {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: var(--radius-lg);
      padding: 1px;
      background: linear-gradient(135deg, var(--primary), var(--secondary-glow));
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
      opacity: 0;
      transition: 0.3s;
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }
    .service-card:hover::before {
      opacity: 1;
    }
    .card-icon {
      width: 64px;
      height: 64px;
      background: #F0F0F5;
      border-radius: 16px;
      margin-bottom: 20px;
    }
    @media (max-width: 1024px) {
      .cards-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .cards-grid { grid-template-columns: 1fr; }
    }
    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      text-align: center;
      position: relative;
    }
    .step {
      flex:1;
    }
    .step-badge {
      width: 56px;
      height: 56px;
      background: linear-gradient(135deg, var(--primary), #FF8C42);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      color: white;
      font-weight: 800;
      font-size: 24px;
      box-shadow: 0 0 18px rgba(255,77,46,0.7);
    }
    @media (max-width: 768px) {
      .steps { flex-direction: column; gap: 32px; }
    }
    /* 深色数据区 */
    .dark-stats {
      background: linear-gradient(135deg, #2D1B4A, #1A1A2E);
      color: white;
      padding: 80px 0;
    }
    .stats-grid {
      display: flex;
      justify-content: center;
      gap: 64px;
      flex-wrap: wrap;
    }
    .big-number {
      font-size: 56px;
      font-weight: 800;
      color: var(--accent-cyan);
    }
    /* 证言 */
    .testimonial-card {
      background: white;
      border-left: 6px solid var(--primary);
      padding: 28px;
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #e0e0e0;
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #4a4a5a;
    }
    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, #6C2BD9, #2D1B4A);
      padding: 80px 0;
      text-align: center;
      color: white;
    }
    /* 页脚 */
    .footer {
      background: var(--neutral-dark);
      color: #b0b0c0;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }
    .footer a { color: #ccc; text-decoration: none; }
    .footer a:hover { color: var(--accent-cyan); }