/* roulang page: index */
:root {
      --primary-gradient: linear-gradient(135deg, #FF6A3D 0%, #FF3C7E 100%);
      --primary-start: #FF6A3D;
      --primary-end: #FF3C7E;
      --deep-bg: #1E1E2C;
      --text-primary: #2D2D3A;
      --text-secondary: #5A5A6E;
      --background: #F9F9FC;
      --card-bg: #FFFFFF;
      --success: #00C9A7;
      --warning: #FFC75F;
      --border-light: rgba(0,0,0,0.05);
      --radius-card: 20px;
      --radius-btn: 12px;
      --radius-input: 10px;
      --shadow-card: 0 8px 30px rgba(0,0,0,0.04);
      --shadow-hover: 0 20px 35px rgba(0,0,0,0.08);
      --transition: all 0.25s ease;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      font-family: 'Inter', system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--background);
      color: var(--text-primary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    h1, h2, h3 {
      font-weight: 700;
      line-height: 1.2;
    }
    
    h2 {
      font-size: clamp(1.8rem, 4vw, 2.2rem);
      margin-bottom: 1rem;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: inline-block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 导航栏 - 悬浮胶囊 */
    .nav-capsule {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 40px);
      max-width: 1100px;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: 50px;
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 10px 25px rgba(0,0,0,0.06);
      z-index: 1000;
      transition: background 0.3s, box-shadow 0.3s;
    }
    
    .nav-capsule.scrolled {
      background: rgba(255,255,255,0.96);
      box-shadow: 0 15px 30px rgba(0,0,0,0.12);
    }
    
    .logo {
      font-weight: 800;
      font-size: 1.7rem;
      letter-spacing: -0.5px;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .logo i {
      font-size: 1.9rem;
      background: none;
      -webkit-text-fill-color: #FF6A3D;
      color: #FF6A3D;
    }
    
    .nav-links {
      display: flex;
      gap: 1.8rem;
      font-weight: 500;
      color: var(--text-primary);
    }
    
    .nav-links a {
      padding: 6px 0;
      position: relative;
      font-size: 0.95rem;
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-gradient);
      transition: width 0.2s ease;
    }
    
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-primary);
    }
    
    /* 英雄区 */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      padding: 120px 0 80px;
    }
    
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    
    .hero-left h1 {
      font-size: clamp(2.8rem, 5vw, 4rem);
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 1.2rem;
      color: var(--text-primary);
      background: linear-gradient(135deg, #2D2D3A 20%, #FF3C7E);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      max-width: 90%;
    }
    
    .cta-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      margin-bottom: 2.5rem;
    }
    
    .btn-primary {
      background: var(--primary-gradient);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      box-shadow: 0 8px 20px rgba(255,58,120,0.3);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 15px 25px rgba(255,58,120,0.4);
      filter: brightness(1.05);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid transparent;
      background-image: linear-gradient(white, white), var(--primary-gradient);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      color: #FF3C7E;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    
    .btn-outline:hover {
      background-image: linear-gradient(rgba(255,58,120,0.05), rgba(255,58,120,0.05)), var(--primary-gradient);
    }
    
    .hero-stats {
      display: flex;
      gap: 2rem;
    }
    
    .stat-badge {
      background: white;
      border-radius: 16px;
      padding: 10px 20px;
      box-shadow: 0 6px 18px rgba(0,0,0,0.04);
      text-align: center;
    }
    
    .stat-number {
      font-size: 1.8rem;
      font-weight: 700;
      color: #FF3C7E;
    }
    
    .hero-right {
      position: relative;
      display: flex;
      justify-content: center;
    }
    
    .hero-illustration {
      width: 100%;
      height: 420px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 40px;
      box-shadow: 0 30px 45px rgba(0,0,0,0.1);
      position: relative;
      overflow: hidden;
    }
    
    .hero-illustration::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(255,106,61,0.25), rgba(255,60,126,0.3));
      mix-blend-mode: overlay;
    }
    
    /* 亮点网格 */
    .features {
      padding: 90px 0;
    }
    
    .section-header {
      margin-bottom: 2.5rem;
    }
    
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      border-left: 4px solid transparent;
      position: relative;
    }
    
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-left: 4px solid #FF6A3D;
    }
    
    .feature-card.featured {
      box-shadow: 0 15px 35px rgba(255,60,126,0.15);
      border-left: 4px solid #FF3C7E;
    }
    
    .feature-icon {
      font-size: 2.3rem;
      color: #FF6A3D;
      margin-bottom: 1.2rem;
    }
    
    .feature-card h3 {
      font-size: 1.4rem;
      margin-bottom: 0.5rem;
      color: var(--text-primary);
    }
    
    .badge-hot {
      background: var(--warning);
      color: #1E1E2C;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.7rem;
      font-weight: 700;
      margin-left: 8px;
      vertical-align: middle;
    }
    
    /* 案例瀑布 */
    .cases {
      padding: 80px 0;
    }
    
    .masonry {
      columns: 3;
      column-gap: 24px;
    }
    
    .case-card {
      break-inside: avoid;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      margin-bottom: 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    
    .case-img.cover1 { background-image: url('/assets/images/coverpic/cover-1.webp'); }
    .case-img.cover2 { background-image: url('/assets/images/coverpic/cover-2.webp'); }
    .case-img.cover3 { background-image: url('/assets/images/coverpic/cover-3.webp'); }
    .case-img.cover4 { background-image: url('/assets/images/coverpic/cover-4.webp'); }
    
    .case-content {
      padding: 20px;
    }
    
    .case-tag {
      color: #FF3C7E;
      font-weight: 600;
      font-size: 0.8rem;
    }
    
    .case-title {
      font-size: 1.2rem;
      margin: 8px 0;
    }
    
    .case-meta {
      display: flex;
      justify-content: space-between;
      color: var(--text-secondary);
      font-size: 0.85rem;
    }
    
    /* 方案对比 */
    .plans {
      padding: 80px 0;
    }
    
    .plan-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      align-items: center;
    }
    
    .plan-card {
      background: white;
      border-radius: 28px;
      padding: 32px 20px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    
    .plan-card.highlight {
      transform: scale(1.05);
      background: white;
      border: 2px solid transparent;
      background-clip: padding-box;
      position: relative;
      box-shadow: 0 25px 45px rgba(255,60,126,0.2);
      z-index: 2;
      border-image: var(--primary-gradient) 1;
    }
    
    .plan-badge {
      background: var(--primary-gradient);
      color: white;
      padding: 6px 18px;
      border-radius: 20px;
      font-size: 0.8rem;
      display: inline-block;
      margin-bottom: 1rem;
    }
    
    .plan-price {
      font-size: 2.4rem;
      font-weight: 800;
      margin: 1rem 0;
    }
    
    .plan-list {
      list-style: none;
      text-align: left;
      margin: 1.5rem 0;
    }
    
    .plan-list li {
      padding: 6px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    /* FAQ */
    .faq {
      padding: 80px 0;
    }
    
    .accordion {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .accordion-item {
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .accordion-btn {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      color: var(--text-primary);
    }
    
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }
    
    .accordion-content.open {
      max-height: 200px;
      padding-bottom: 16px;
    }
    
    /* CTA 块 */
    .cta-block {
      background: var(--primary-gradient);
      border-radius: 40px;
      padding: 70px 30px;
      text-align: center;
      color: white;
      margin: 60px 0;
    }
    
    /* 联系表单 */
    .contact {
      padding: 80px 0;
      background: var(--deep-bg);
      color: #ddd;
      border-radius: 40px 40px 0 0;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
    }
    
    .form-input {
      width: 100%;
      padding: 14px;
      border-radius: var(--radius-input);
      border: 1px solid rgba(255,255,255,0.2);
      background: rgba(255,255,255,0.05);
      color: white;
      margin-bottom: 1rem;
    }
    
    .copyright {
      text-align: center;
      margin-top: 3rem;
      color: #aaa;
    }
    
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr; }
      .masonry { columns: 2; }
      .plan-grid { grid-template-columns: 1fr; }
      .plan-card.highlight { transform: scale(1); }
      .footer-grid { grid-template-columns: 1fr; }
    }