/* roulang page: index */
:root {
      --primary: #7B2FBE;
      --primary-light: #A855F7;
      --accent-gold: #F5A623;
      --accent-cyan: #00E5FF;
      --bg-deep: #0A0A0F;
      --bg-card: #12121A;
      --bg-container: #1A1A2E;
      --text-white: #FFFFFF;
      --text-body: #B0B0C0;
      --text-sub: #E0E0EE;
      --border-light: rgba(255, 255, 255, 0.06);
      --shadow-card: 0 4px 24px rgba(123, 47, 190, 0.08);
      --shadow-hover: 0 8px 40px rgba(123, 47, 190, 0.2);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-digit: 'Orbitron', 'DIN Alternate', 'Rajdhani', sans-serif;
      --bs-primary: #7B2FBE;
      --bs-primary-rgb: 123, 47, 190;
      --bs-border-radius: 0.75rem;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg-deep);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 700;
      color: var(--text-white);
      line-height: 1.2;
    }

    a {
      text-decoration: none;
      color: var(--text-body);
      transition: color 0.2s;
    }
    a:hover {
      color: var(--primary-light);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .navbar {
      background: rgba(10, 10, 15, 0.85);
      backdrop-filter: blur(12px);
      height: 72px;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      position: fixed;
      width: 100%;
      top: 0;
      z-index: 1000;
      transition: box-shadow 0.3s;
    }
    .navbar.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }
    .navbar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.6rem;
      font-weight: 700;
      background: linear-gradient(135deg, #7B2FBE, #A855F7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .logo-icon {
      width: 28px;
      height: 28px;
      border: 2px solid #A855F7;
      transform: rotate(45deg);
      background: transparent;
      position: relative;
    }
    .logo-icon::after {
      content: "";
      position: absolute;
      width: 10px;
      height: 10px;
      background: #F5A623;
      border-radius: 50%;
      top: 7px;
      left: 7px;
    }
    .nav-menu {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .nav-link {
      color: #B0B0C0;
      font-weight: 500;
      position: relative;
      padding: 0.25rem 0;
    }
    .nav-link:hover, .nav-link.active {
      color: #A855F7;
    }
    .btn-primary-custom {
      background: linear-gradient(135deg, #7B2FBE, #A855F7);
      border: none;
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 12px rgba(123,47,190,0.3);
    }
    .btn-primary-custom:hover {
      filter: brightness(1.15);
      box-shadow: 0 0 20px rgba(168,85,247,0.5);
      transform: scale(1.03);
      color: white;
    }
    .navbar-toggler {
      border: none;
      color: white;
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: radial-gradient(circle at 80% 20%, rgba(123,47,190,0.12) 0%, transparent 50%), var(--bg-deep);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .hero-particles {
      position: absolute;
      width: 100%;
      height: 100%;
      top: 0;
      left: 0;
      pointer-events: none;
    }
    .particle {
      position: absolute;
      background: white;
      border-radius: 50%;
      opacity: 0.3;
      animation: float 8s infinite ease-in-out;
    }
    @keyframes float {
      0% { transform: translateY(0px); opacity: 0.2; }
      50% { transform: translateY(-30px); opacity: 0.6; }
      100% { transform: translateY(0px); opacity: 0.2; }
    }
    .hero-glow {
      position: absolute;
      right: -100px;
      bottom: -100px;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(123,47,190,0.25) 0%, transparent 70%);
      filter: blur(120px);
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero h1 {
      font-size: 48px;
      margin-bottom: 1.5rem;
    }
    .hero h1 span {
      background: linear-gradient(135deg, #A855F7, #F5A623);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero .lead {
      font-size: 18px;
      color: #B0B0C0;
      margin-bottom: 2.5rem;
    }
    .btn-outline-gold {
      border: 1px solid #F5A623;
      color: #F5A623;
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s;
    }
    .btn-outline-gold:hover {
      background: rgba(245,166,35,0.1);
      color: #F5A623;
    }
    .scroll-hint {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: #B0B0C0;
      font-size: 14px;
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%,100%{transform:translateY(0);}
      50%{transform:translateY(-10px);}
    }

    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 36px;
      margin-bottom: 1rem;
    }
    .section-sub {
      color: #B0B0C0;
      margin-bottom: 3rem;
    }

    /* 数据卡片 */
    .stat-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 2.5rem 2rem;
      text-align: center;
      transition: all 0.3s;
    }
    .stat-card:hover {
      border-color: #7B2FBE;
      box-shadow: var(--shadow-hover);
    }
    .stat-number {
      font-family: var(--font-digit);
      font-size: 48px;
      color: #F5A623;
      font-weight: 700;
    }

    /* 业务卡片 */
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: 0.3s;
    }
    .service-card:hover {
      transform: translateY(-4px);
      border-color: #7B2FBE;
      box-shadow: 0 8px 30px rgba(123,47,190,0.15);
    }
    .icon-badge {
      font-size: 2.4rem;
      color: #A855F7;
      margin-bottom: 1rem;
    }

    /* 案例卡片 */
    .case-card {
      background: #12121A;
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid var(--border-light);
    }
    .case-img {
      position: relative;
      aspect-ratio: 16/9;
      overflow: hidden;
    }
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-tag {
      background: #00E5FF;
      color: #0A0A0F;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
    }

    /* 青训流程 */
    .step-item {
      display: flex;
      gap: 1rem;
      margin-bottom: 2rem;
    }
    .step-circle {
      width: 40px;
      height: 40px;
      background: #7B2FBE;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: white;
    }

    /* FAQ */
    .accordion-button {
      background: #12121A;
      color: white;
      font-weight: 600;
      border: 1px solid rgba(255,255,255,0.06);
    }
    .accordion-button:not(.collapsed) {
      background: #1A1A2E;
      color: #A855F7;
      border-left: 3px solid #A855F7;
    }

    /* CTA表单 */
    .cta-section {
      background: #0D0D1A;
    }
    .form-control {
      background: #1A1A2E;
      border: 1px solid rgba(255,255,255,0.1);
      color: white;
      border-radius: 8px;
      padding: 12px 16px;
    }
    .form-control:focus {
      border-color: #A855F7;
      box-shadow: 0 0 0 0.2rem rgba(123,47,190,0.25);
    }

    footer {
      background: #06060D;
      color: #707080;
      font-size: 14px;
    }
    @media (max-width: 992px) {
      .hero h1 { font-size: 36px; }
    }
    @media (max-width: 768px) {
      .hero h1 { font-size: 28px; }
      section { padding: 60px 0; }
    }