/* roulang page: index */
:root {
      --primary-start: #FF5E3A;
      --primary-end: #FF2A68;
      --primary-gradient: linear-gradient(135deg, #FF5E3A 0%, #FF2A68 100%);
      --primary-light: rgba(255, 94, 58, 0.08);
      --secondary-dark: #1E1E2F;
      --warm-bg: #F9F6F0;
      --accent-green: #A3E635;
      --accent-green-bg: rgba(163, 230, 53, 0.15);
      --white: #FFFFFF;
      --card-bg: #FFFFFF;
      --border-soft: #E8E3DA;
      --border-light: #EFEBE4;
      --text-gray: #4A4A5A;
      --text-muted: #6B6B7B;
      --radius-xl: 20px;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-full: 30px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
      --transition: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--warm-bg);
      color: var(--secondary-dark);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    /* 导航卡片面板 */
    .nav-panel {
      background: var(--white);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-card);
      padding: 12px 24px;
      margin-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: sticky;
      top: 20px;
      z-index: 50;
      backdrop-filter: blur(10px);
      background: rgba(255,255,255,0.92);
      border: 1px solid var(--border-soft);
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .logo-icon {
      font-size: 1.8rem;
      background: none;
      -webkit-text-fill-color: #FF5E3A;
      background-clip: unset;
    }
    
    .nav-links {
      display: flex;
      gap: 8px;
      align-items: center;
    }
    
    .nav-item {
      padding: 8px 16px;
      border-radius: var(--radius-full);
      background: var(--warm-bg);
      color: var(--secondary-dark);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 6px;
      border: 1px solid transparent;
    }
    
    .nav-item i {
      font-size: 0.9rem;
      color: #FF5E3A;
    }
    
    .nav-item:hover {
      background: var(--white);
      box-shadow: var(--shadow-card);
      border-left: 3px solid #FF5E3A;
      color: #FF2A68;
    }
    
    .cta-nav {
      background: var(--primary-gradient);
      color: var(--white) !important;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-weight: 600;
      box-shadow: 0 8px 18px rgba(255,46,104,0.25);
      border: none;
      margin-left: 12px;
    }
    
    .cta-nav:hover {
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(255,46,104,0.35);
    }
    
    .hamburger {
      display: none;
      font-size: 1.8rem;
      background: none;
      border: none;
      color: var(--secondary-dark);
    }
    
    /* Hero 双栏 */
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
      margin: 60px 0 80px;
    }
    
    .hero-left {
      flex: 5;
    }
    
    .hero-right {
      flex: 7;
      position: relative;
    }
    
    .hero-title {
      font-family: var(--font-heading);
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--secondary-dark);
      margin-bottom: 1.2rem;
    }
    
    .gradient-text {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    
    .hero-sub {
      font-size: 1.125rem;
      color: var(--text-gray);
      margin-bottom: 2rem;
    }
    
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 2rem;
    }
    
    .btn-primary {
      background: var(--primary-gradient);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      border: none;
      box-shadow: 0 10px 20px rgba(255,46,104,0.3);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    
    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 14px 28px rgba(255,46,104,0.4);
      color: white;
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid #FF5E3A;
      color: #FF5E3A;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      transition: var(--transition);
    }
    
    .btn-outline:hover {
      background: rgba(255,94,58,0.08);
      color: #FF2A68;
    }
    
    .hero-image {
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      position: relative;
    }
    
    .hero-image img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    
    .overlay-gradient {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(135deg, rgba(255,94,58,0.15) 0%, rgba(255,42,104,0.05) 100%);
      pointer-events: none;
    }
    
    .badge-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 20px;
    }
    
    .badge {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 12px 18px;
      box-shadow: var(--shadow-card);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    .badge-number {
      font-family: var(--font-number);
      font-size: 1.8rem;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    
    .badge-desc {
      font-size: 0.9rem;
      color: var(--text-gray);
    }
    
    /* 板块标题 */
    .section-title {
      font-family: var(--font-heading);
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--secondary-dark);
      margin-bottom: 0.5rem;
    }
    
    .title-decor {
      width: 60px;
      height: 4px;
      background: var(--primary-gradient);
      border-radius: 4px;
      margin: 12px 0 32px;
    }
    
    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin: 40px 0;
    }
    
    .highlight-card {
      background: var(--card-bg);
      border-radius: var(--radius-xl);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    
    .highlight-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }
    
    .highlight-card::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--primary-gradient);
      transform: scaleX(0);
      transition: transform 0.3s ease;
    }
    
    .highlight-card:hover::after {
      transform: scaleX(1);
    }
    
    .card-icon {
      font-size: 2.4rem;
      color: #FF5E3A;
      margin-bottom: 18px;
    }
    
    .highlight-card h3 {
      font-size: 1.35rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    
    /* 案例瀑布流 */
    .masonry-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .case-card {
      background: var(--white);
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    
    .case-img {
      position: relative;
      overflow: hidden;
      height: 200px;
    }
    
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }
    
    .case-card:hover .case-img img {
      transform: scale(1.05);
    }
    
    .case-tag {
      background: var(--accent-green-bg);
      color: #5B8C1A;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    
    .case-content {
      padding: 20px;
    }
    
    /* 方案对比表 */
    .plans-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }
    
    .plan-card {
      background: var(--white);
      border-radius: var(--radius-xl);
      padding: 28px 20px;
      box-shadow: var(--shadow-card);
      text-align: center;
      transition: var(--transition);
      position: relative;
    }
    
    .plan-recommend {
      background: linear-gradient(135deg, rgba(255,94,58,0.08) 0%, rgba(255,42,104,0.05) 100%);
      border: 1px solid #FF5E3A;
      transform: scale(1.02);
    }
    
    .badge-recommend {
      background: var(--accent-green);
      color: #1E1E2F;
      padding: 4px 14px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.8rem;
    }
    
    /* FAQ */
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid transparent;
      transition: var(--transition);
    }
    
    .faq-item.active {
      border-left: 4px solid #FF5E3A;
    }
    
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    
    /* CTA */
    .cta-section {
      background: var(--primary-gradient);
      border-radius: var(--radius-xl);
      padding: 60px 40px;
      color: white;
    }
    
    .footer-dark {
      background: #1E1E2F;
      color: #ccc;
      padding: 50px 0 20px;
    }
    
    @media (max-width: 1024px) {
      .plans-grid { grid-template-columns: repeat(2,1fr); }
    }
    
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .hero-grid { flex-direction: column; }
      .highlights-grid { grid-template-columns: 1fr; }
      .masonry-grid { grid-template-columns: 1fr; }
      .plans-grid { grid-template-columns: 1fr; }
    }