/* roulang page: index */
:root {
      --deep-black: #0A0A0F;
      --card-bg: #12121A;
      --purple-dark: #7B2FBE;
      --purple-bright: #A855F7;
      --gold: #F5A623;
      --neon-cyan: #00F0FF;
      --white: #FFFFFF;
      --text-gray: #B0B0C0;
      --text-muted: #6B6B80;
      --border-subtle: rgba(160, 80, 255, 0.2);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.3);
      --font-zh: 'Noto Sans SC', '思源黑体', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-en: 'Rajdhani', 'Orbitron', sans-serif;
      --header-height: 64px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--deep-black);
    }

    body {
      font-family: var(--font-zh);
      background-color: var(--deep-black);
      color: var(--text-gray);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background-color: rgba(10, 10, 15, 0.92);
      backdrop-filter: blur(12px);
      z-index: 1000;
      border-bottom: 1px solid rgba(123, 47, 190, 0.25);
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-family: var(--font-en);
      font-weight: 800;
      font-size: 1.6rem;
      letter-spacing: 2px;
      background: linear-gradient(135deg, #A855F7 0%, #F5A623 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .logo-icon {
      font-size: 1.8rem;
      filter: drop-shadow(0 0 6px #A855F7);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-gray);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      letter-spacing: 2px;
      text-transform: uppercase;
      padding: 8px 0;
      position: relative;
      transition: color 0.25s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 3px;
      background: var(--neon-cyan);
      box-shadow: 0 0 12px var(--neon-cyan);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .nav-cta {
      background: var(--gold);
      color: #0A0A0F !important;
      padding: 8px 18px !important;
      border-radius: 20px;
      font-weight: 700;
      letter-spacing: 1px;
      box-shadow: 0 0 12px rgba(245, 166, 35, 0.5);
    }
    .nav-cta:hover {
      background: #ffb74d;
      color: #000 !important;
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--white);
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(10, 10, 15, 0.75);
      text-align: center;
      padding-top: var(--header-height);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }
    .hero h1 {
      font-family: var(--font-en);
      font-size: clamp(2.8rem, 7vw, 4.5rem);
      font-weight: 800;
      color: var(--white);
      text-shadow: 0 0 30px #7B2FBE;
      margin-bottom: 1rem;
    }
    .hero .subtitle {
      font-size: 1.3rem;
      color: var(--text-gray);
      margin-bottom: 2.5rem;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn {
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      letter-spacing: 1px;
      text-decoration: none;
      transition: all 0.25s;
      display: inline-block;
    }
    .btn-primary {
      background: linear-gradient(135deg, #7B2FBE, #F5A623);
      color: white;
      box-shadow: 0 4px 18px rgba(245, 166, 35, 0.5);
    }
    .btn-primary:hover {
      transform: scale(1.03);
      filter: brightness(1.15);
    }
    .btn-outline {
      border: 1.5px solid var(--neon-cyan);
      color: var(--neon-cyan);
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.15);
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 16px;
      text-align: center;
    }
    .section-desc {
      text-align: center;
      color: var(--text-muted);
      margin-bottom: 48px;
    }

    /* 痛点卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: var(--card-bg);
      border-left: 4px solid var(--purple-dark);
      padding: 28px 20px;
      border-radius: var(--radius-card);
      transition: all 0.3s;
    }
    .pain-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-neon);
    }
    .icon-circle {
      font-size: 2.4rem;
      color: var(--neon-cyan);
      margin-bottom: 16px;
    }

    /* 解决方案翻转 */
    .flip-card {
      background: transparent;
      height: 260px;
      perspective: 1000px;
    }
    .flip-inner {
      position: relative;
      width: 100%;
      height: 100%;
      transition: transform 0.5s;
      transform-style: preserve-3d;
    }
    .flip-card:hover .flip-inner {
      transform: rotateY(180deg);
    }
    .flip-front, .flip-back {
      position: absolute;
      width: 100%;
      height: 100%;
      backface-visibility: hidden;
      border-radius: var(--radius-card);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      background: var(--card-bg);
      border: 1px solid var(--border-subtle);
    }
    .flip-back {
      background: linear-gradient(145deg, #1a1025, #0f0a1a);
      transform: rotateY(180deg);
      border-color: var(--purple-bright);
    }
    .data-bar {
      height: 6px;
      background: #2a2a3a;
      border-radius: 4px;
      margin: 10px 0;
    }
    .data-fill {
      height: 100%;
      background: var(--gold);
      border-radius: 4px;
    }

    /* 实时数据 */
    .odds-ticker {
      background: #0A0A0F;
      border: 1px solid #7B2FBE;
      border-radius: var(--radius-card);
      padding: 16px;
      font-family: var(--font-en);
    }
    .odds-row {
      display: flex;
      justify-content: space-between;
      padding: 10px 0;
      border-bottom: 1px solid #2a1a3a;
    }

    /* 证言滑动 */
    .testimonial-scroll {
      display: flex;
      gap: 20px;
      overflow-x: auto;
      padding-bottom: 16px;
    }
    .testimonial-card {
      min-width: 280px;
      background: var(--card-bg);
      padding: 20px;
      border-radius: var(--radius-card);
      border: 1px solid var(--border-subtle);
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 18px;
      cursor: pointer;
      border-left: 4px solid var(--neon-cyan);
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(0deg, #0A0A0F 0%, #1a1030 100%);
    }

    footer {
      background: #0A0A0F;
      padding: 48px 0;
      border-top: 1px solid #2a1a3a;
    }

    @media (max-width: 768px) {
      .grid-3, .faq-grid { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .hamburger { display: block; }
      .testimonial-scroll { flex-wrap: wrap; }
    }