/* roulang page: index */
:root {
      --deep-purple: #1A0B2E;
      --electric-pink: #E5007E;
      --cyan-neon: #00F0FF;
      --dark-purple-gray: #2D1B4E;
      --text-light: #F0E6FF;
      --text-muted: #A89BBF;
      --border-dim: #3D2A5C;
      --success-green: #00E676;
      --warning-orange: #FF9100;
      --radius-lg: 16px;
      --radius-pill: 50px;
      --radius-sm: 8px;
      --radius-md: 12px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.4);
      --shadow-neon-pink: 0 0 25px rgba(229,0,126,0.5), 0 8px 30px rgba(0,0,0,0.6);
      --shadow-neon-cyan: 0 0 20px rgba(0,240,255,0.4);
      --transition-smooth: all 0.25s ease-in-out;
      --font-mono: "DIN Alternate", "Helvetica Neue", monospace;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      background: var(--deep-purple);
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background: linear-gradient(135deg, #1A0B2E 0%, #2D1B4E 100%);
      color: var(--text-light);
      line-height: 1.7;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    button, input {
      font-family: inherit;
    }
    /* 导航栏 */
    .main-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(26,11,46,0.85);
      backdrop-filter: blur(15px);
      border-bottom: 1px solid rgba(229,0,126,0.25);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
    }
    .logo {
      font-size: 1.6rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      background: linear-gradient(135deg, #fff 0%, #E5007E 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 2.2rem;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding-bottom: 6px;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan-neon);
      transition: width 0.2s ease;
      box-shadow: 0 0 8px var(--cyan-neon);
    }
    .nav-links a:hover {
      color: white;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      background: var(--electric-pink);
      color: white;
      font-weight: 700;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      letter-spacing: 0.8px;
      border: none;
      cursor: pointer;
      transition: 0.2s;
      box-shadow: 0 0 15px rgba(229,0,126,0.5);
    }
    .nav-cta:hover {
      background: #ff1a8c;
      box-shadow: 0 0 28px rgba(229,0,126,0.8);
      transform: scale(1.02);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--text-light);
      transition: 0.2s;
    }
    /* 移动端菜单 */
    @media (max-width: 1024px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .main-nav .nav-cta {
        display: none;
      }
      .mobile-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(10, 5, 20, 0.96);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 32px;
        gap: 24px;
        border-bottom: 2px solid var(--electric-pink);
        display: none;
        z-index: 999;
      }
      .mobile-menu.active {
        display: flex;
      }
      .mobile-menu a {
        font-size: 1.2rem;
        color: var(--text-light);
        border-left: 3px solid var(--cyan-neon);
        padding-left: 16px;
      }
    }
    /* Hero */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
      position: relative;
    }
    .hero-left {
      flex: 1 1 450px;
    }
    .hero h1 {
      font-size: clamp(2.8rem, 6vw, 4.5rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      background: linear-gradient(to right, #E5007E, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 450px;
      margin-bottom: 28px;
    }
    .badge-group {
      display: flex;
      gap: 20px;
      margin-bottom: 32px;
      flex-wrap: wrap;
    }
    .stat-badge {
      background: rgba(45,27,78,0.6);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-sm);
      padding: 14px 20px;
      display: flex;
      flex-direction: column;
    }
    .stat-num {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 2rem;
      color: var(--electric-pink);
    }
    .stat-label {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .btn-group {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--electric-pink);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      letter-spacing: 0.8px;
      cursor: pointer;
      box-shadow: 0 0 18px rgba(229,0,126,0.5);
      transition: 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: #ff1a8c;
      box-shadow: 0 0 30px #E5007E;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--cyan-neon);
      color: var(--cyan-neon);
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      cursor: pointer;
      transition: 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
      box-shadow: 0 0 22px var(--cyan-neon);
    }
    .hero-right {
      flex: 1 1 400px;
      position: relative;
    }
    .hero-visual {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      aspect-ratio: 4/3;
      border: 2px solid var(--electric-pink);
      box-shadow: 0 0 45px rgba(229,0,126,0.35);
      filter: brightness(0.9) contrast(1.1);
      position: relative;
      overflow: hidden;
    }
    .floating-glow {
      position: absolute;
      width: 120px;
      height: 120px;
      background: radial-gradient(circle, rgba(0,240,255,0.2) 0%, transparent 70%);
      top: 20px;
      right: 20px;
      animation: float 6s infinite ease-in-out;
    }
    @keyframes float {
      0% { transform: translate(0,0); }
      50% { transform: translate(15px, -15px); }
      100% { transform: translate(0,0); }
    }
    /* 亮点网格 2+1 */
    .highlights {
      padding: 80px 0;
    }
    .section-title {
      font-size: clamp(2rem, 4vw, 2.8rem);
      font-weight: 700;
      margin-bottom: 20px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 45px;
      height: 3px;
      background: var(--cyan-neon);
      margin-top: 8px;
      box-shadow: 0 0 12px var(--cyan-neon);
    }
    .highlight-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1.5fr;
      gap: 24px;
      margin-top: 40px;
    }
    .card {
      background: rgba(45,27,78,0.55);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid rgba(229,0,126,0.15);
      transition: all 0.3s;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-neon-pink);
      border-color: var(--electric-pink);
    }
    .big-card {
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      min-height: 320px;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .big-card .overlay {
      background: linear-gradient(0deg, rgba(26,11,46,0.85) 0%, rgba(26,11,46,0.2) 100%);
      padding: 28px;
    }
    /* 案例瀑布 */
    .cases {
      padding: 80px 0;
    }
    .masonry {
      columns: 3;
      column-gap: 20px;
      margin-top: 40px;
    }
    .case-card {
      break-inside: avoid;
      background: #2D1B4E;
      border-radius: var(--radius-lg);
      overflow: hidden;
      margin-bottom: 20px;
      transition: 0.3s;
    }
    .case-card:hover img {
      transform: scale(1.05);
    }
    .case-img {
      overflow: hidden;
      position: relative;
    }
    .case-img img {
      transition: 0.3s;
      aspect-ratio: 4/3;
      object-fit: cover;
    }
    .case-content {
      padding: 16px;
    }
    .tag {
      border: 1px solid var(--cyan-neon);
      color: var(--cyan-neon);
      padding: 4px 12px;
      border-radius: 50px;
      font-size: 0.75rem;
    }
    /* 方案对比 */
    .solutions {
      padding: 80px 0;
    }
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 40px;
    }
    .plan {
      background: rgba(45,27,78,0.4);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-dim);
    }
    .plan-premium {
      background: rgba(229,0,126,0.08);
      border: 1px solid var(--electric-pink);
      position: relative;
    }
    .badge-recommend {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--cyan-neon);
      color: #1A0B2E;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.8rem;
      transform: rotate(3deg);
    }
    /* FAQ */
    .faq {
      padding: 80px 0;
    }
    .faq-item {
      background: rgba(45,27,78,0.5);
      border-left: 3px solid var(--border-dim);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      transition: 0.2s;
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
    }
    .faq-item.active {
      border-left-color: var(--cyan-neon);
      box-shadow: 0 0 18px rgba(0,240,255,0.3);
    }
    /* CTA横幅 */
    .cta-banner {
      padding: 80px 0;
      background: radial-gradient(circle at center, rgba(229,0,126,0.2) 0%, transparent 70%);
      text-align: center;
    }
    /* 页脚 */
    .footer {
      background: #0f0520;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
    }
    .social-icons i {
      font-size: 1.4rem;
      margin-right: 16px;
      color: var(--text-muted);
      transition: 0.2s;
    }
    .social-icons i:hover {
      color: var(--electric-pink);
      text-shadow: 0 0 10px var(--electric-pink);
    }
    @media (max-width: 1024px) {
      .highlight-grid { grid-template-columns: 1fr; }
      .masonry { columns: 2; }
      .compare-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero { flex-direction: column; }
      .masonry { columns: 1; }
      .footer-grid { grid-template-columns: 1fr; }
    }