/* roulang page: index */
:root {
      --primary-purple: #8C1EFF;
      --electric-purple: #7B2FFF;
      --accent-orange: #FF6B2B;
      --deep-bg: #0E0A1A;
      --surface-dark: #1E1630;
      --surface-glow: rgba(25, 18, 45, 0.85);
      --text-white: #FFFFFF;
      --text-light-purple: #C0B7D6;
      --text-muted: #7A6F9C;
      --border-glow: rgba(140, 30, 255, 0.25);
      --card-shadow: 0 4px 24px rgba(123, 47, 255, 0.15);
      --card-hover-shadow: 0 8px 32px rgba(123, 47, 255, 0.3);
      --gradient-main: linear-gradient(135deg, #8C1EFF, #FF6B2B);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 20px;
      --font-title: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      background: var(--deep-bg);
      color: var(--text-light-purple);
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 30% 10%, rgba(123,47,255,0.08) 0%, transparent 40%);
    }
    h1, h2, h3, h4 {
      font-family: var(--font-title);
      color: var(--text-white);
    }
    a {
      color: var(--text-light-purple);
      transition: color 0.2s;
    }
    a:hover {
      color: var(--electric-purple);
    }
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar-custom {
      background: rgba(14, 10, 26, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(123,47,255,0.25);
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .brand-logo {
      font-size: 1.8rem;
      font-weight: 800;
      background: linear-gradient(135deg, #b77eff, #8C1EFF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }
    .nav-tabs-pills {
      display: flex;
      flex-wrap: nowrap;
      overflow-x: auto;
      gap: 8px;
      padding: 8px 0 12px;
      scrollbar-width: thin;
      scrollbar-color: var(--electric-purple) transparent;
    }
    .nav-tabs-pills::-webkit-scrollbar {
      height: 4px;
      background: transparent;
    }
    .nav-tabs-pills::-webkit-scrollbar-thumb {
      background: var(--electric-purple);
      border-radius: 4px;
    }
    .pill-link {
      white-space: nowrap;
      padding: 8px 20px;
      border-radius: 20px;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-light-purple);
      border: 1px solid rgba(140,30,255,0.45);
      background: transparent;
      transition: all 0.2s;
      text-decoration: none;
    }
    .pill-link.active, .pill-link:hover {
      background: var(--electric-purple);
      color: white;
      border-color: var(--electric-purple);
      box-shadow: 0 0 12px rgba(140,30,255,0.5);
    }
    .btn-gradient {
      background: var(--gradient-main);
      border: none;
      color: white;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.3s;
      box-shadow: 0 4px 14px rgba(140,30,255,0.4);
    }
    .btn-gradient:hover {
      background: linear-gradient(135deg, #9d3fff, #ff7a3f);
      box-shadow: 0 0 22px rgba(140,30,255,0.7);
      color: white;
      transform: translateY(-1px);
    }
    .btn-outline-purple {
      border: 1px solid var(--electric-purple);
      color: var(--electric-purple);
      background: transparent;
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.2s;
    }
    .btn-outline-purple:hover {
      background: rgba(140,30,255,0.15);
      color: white;
      border-color: #b77eff;
    }
    /* Hero */
    .hero-section {
      padding: 80px 0 100px;
      background: radial-gradient(ellipse at 30% 40%, #1a1130 0%, #0e0a1a 70%);
      position: relative;
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    .hero-visual {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 320px;
      border-radius: 28px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(123,47,255,0.3);
      border: 1px solid rgba(140,30,255,0.3);
    }
    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(140,30,255,0.65), rgba(255,107,43,0.3));
      mix-blend-mode: overlay;
    }
    .decor-line {
      width: 60px;
      height: 4px;
      background: var(--gradient-main);
      border-radius: 4px;
    }
    /* 亮点网格 */
    .highlight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 30px;
    }
    .highlight-card {
      background: var(--surface-glow);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      transition: all 0.25s;
      box-shadow: var(--card-shadow);
    }
    .highlight-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
      border-color: rgba(140,30,255,0.5);
    }
    .highlight-card.offset-up {
      margin-top: -22px;
    }
    .big-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-orange);
      line-height: 1.2;
    }
    /* 案例瀑布 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #1b1428;
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid rgba(140,30,255,0.2);
      transition: 0.3s;
    }
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 28px rgba(140,30,255,0.4);
    }
    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .case-img::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 0%, rgba(140,30,255,0.7) 100%);
      transition: 0.3s;
    }
    .case-card:hover .case-img::before {
      background: linear-gradient(180deg, transparent 20%, rgba(140,30,255,0.4) 100%);
    }
    .tag-orange {
      background: rgba(255,107,43,0.25);
      color: var(--accent-orange);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 700;
    }
    /* 方案对比 */
    .plan-col {
      background: rgba(30,22,48,0.9);
      border: 1px solid rgba(140,30,255,0.3);
      border-radius: 16px;
      padding: 32px 20px;
      transition: 0.2s;
    }
    .plan-highlight {
      border: 2px solid var(--accent-orange);
      transform: scale(1.04);
      box-shadow: 0 0 28px rgba(255,107,43,0.35);
      position: relative;
      background: #221b35;
    }
    .popular-badge {
      background: var(--accent-orange);
      color: #0e0a1a;
      font-weight: 800;
      font-size: 0.8rem;
      padding: 4px 18px;
      border-radius: 20px;
    }
    .price {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-orange);
    }
    /* FAQ */
    .accordion-button {
      background: #1c1530;
      color: white;
      font-weight: 700;
      border: 1px solid rgba(140,30,255,0.25);
      border-radius: 8px !important;
    }
    .accordion-button:not(.collapsed) {
      background: #2a1f44;
      color: white;
      box-shadow: 0 0 12px rgba(140,30,255,0.4);
    }
    .accordion-body {
      background: #1e1630;
      color: #C0B7D6;
      border-top: 1px solid rgba(140,30,255,0.2);
    }
    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #130b24, #0b0618);
      border-top: 1px solid rgba(140,30,255,0.4);
      border-bottom: 1px solid rgba(140,30,255,0.4);
    }
    .pulse-btn {
      animation: pulseGlow 2s infinite;
    }
    @keyframes pulseGlow {
      0% { box-shadow: 0 0 10px rgba(140,30,255,0.6); }
      50% { box-shadow: 0 0 30px rgba(255,107,43,0.8); }
      100% { box-shadow: 0 0 10px rgba(140,30,255,0.6); }
    }
    footer a {
      color: #9b8db5;
      text-decoration: none;
    }
    footer a:hover {
      color: var(--electric-purple);
    }
    @media (max-width: 1024px) {
      .highlight-grid { grid-template-columns: repeat(2, 1fr); }
      .case-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2.3rem; }
      .highlight-grid { grid-template-columns: 1fr; }
      .highlight-card.offset-up { margin-top: 0; }
      .case-grid { grid-template-columns: 1fr; }
      .plan-highlight { transform: scale(1); }
      .navbar-tabs { overflow-x: auto; }
    }