/* roulang page: index */
:root {
      --deep-black: #0A0E17;
      --competitive-red: #E43D2A;
      --track-gold: #F5A623;
      --soft-white: #F4F4F6;
      --dark-blue-gray: #1C2333;
      --text-gray: #8E95A3;
      --success-green: #1EC980;
      --white: #FFFFFF;
      --light-text: #E1E5EC;
      --card-shadow: 0 4px 24px rgba(0,0,0,0.25);
      --card-hover-shadow: 0 12px 32px rgba(0,0,0,0.4);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-tag: 6px;
      --transition-smooth: 0.2s ease;
      --transition-bounce: 0.25s cubic-bezier(0.2, 0.9, 0.4, 1);
      --max-width: 1280px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--deep-black);
      color: var(--light-text);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background-color: rgba(10, 14, 23, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 100;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      transition: padding 0.3s ease, box-shadow 0.3s ease;
    }
    .navbar.scrolled {
      box-shadow: 0 8px 20px rgba(0,0,0,0.6);
      padding: 8px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      height: 72px;
      transition: height 0.3s ease;
    }
    .navbar.scrolled .nav-container {
      height: 64px;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--white);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo span {
      color: var(--competitive-red);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-menu a {
      color: var(--text-gray);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s ease;
      position: relative;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--white);
    }
    .nav-cta {
      background-color: var(--competitive-red);
      color: white !important;
      padding: 10px 22px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: background-color 0.2s ease, transform 0.2s ease;
    }
    .nav-cta:hover {
      background-color: #C5301C;
      transform: scale(1.03);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--white);
      border-radius: 2px;
      transition: 0.2s;
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 40px;
        font-size: 1.6rem;
        transform: translateY(-100%);
        transition: transform 0.35s ease;
        z-index: 99;
      }
      .nav-menu.active {
        transform: translateY(0);
      }
      .hamburger {
        display: flex;
        z-index: 101;
      }
      .nav-cta {
        font-size: 1.4rem;
        padding: 14px 32px;
      }
    }
    /* 区块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 70px 0;
      }
    }
    h2 {
      font-size: 2.5rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: var(--white);
    }
    @media (max-width: 768px) {
      h2 {
        font-size: 2rem;
      }
    }
    /* Hero */
    .hero {
      padding-top: 140px;
      padding-bottom: 100px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      background-blend-mode: overlay;
      background-color: rgba(10,14,23,0.7);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-left {
      flex: 1;
    }
    .hero-right {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      color: var(--white);
    }
    .hero h1 span {
      color: var(--competitive-red);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-gray);
      margin-bottom: 32px;
      max-width: 480px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--competitive-red);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: background 0.2s, transform 0.2s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary:hover {
      background: #C5301C;
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--competitive-red);
      color: var(--competitive-red);
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: 0.2s;
      text-decoration: none;
    }
    .btn-outline:hover {
      background: var(--competitive-red);
      color: white;
    }
    .live-card {
      background: rgba(28, 35, 51, 0.9);
      backdrop-filter: blur(8px);
      padding: 28px;
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      min-width: 240px;
    }
    .live-number {
      font-family: 'Inter', sans-serif;
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--track-gold);
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
        gap: 40px;
      }
      .hero h1 {
        font-size: 2.5rem;
      }
    }
    /* 指标看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--dark-blue-gray);
      padding: 28px 20px;
      border-radius: var(--border-radius-card);
      text-align: center;
      box-shadow: var(--card-shadow);
    }
    .stat-icon {
      font-size: 2rem;
      color: var(--track-gold);
      margin-bottom: 12px;
    }
    .stat-number {
      font-family: 'Inter', sans-serif;
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--white);
    }
    .stat-label {
      color: var(--text-gray);
      font-size: 0.9rem;
      margin-top: 6px;
    }
    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--soft-white);
      color: var(--deep-black);
      padding: 32px 24px;
      border-radius: var(--border-radius-card);
      transition: all 0.25s ease;
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
      border: 1px solid rgba(228,61,42,0.4);
    }
    .service-icon {
      font-size: 2rem;
      color: var(--competitive-red);
      margin-bottom: 16px;
      transition: transform 0.2s;
    }
    .service-card:hover .service-icon {
      transform: rotate(3deg);
      color: var(--track-gold);
    }
    .service-card h3 {
      font-weight: 700;
      margin-bottom: 12px;
    }
    .service-link {
      color: var(--competitive-red);
      font-weight: 600;
      text-decoration: none;
      margin-top: 12px;
      display: inline-block;
    }
    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 对比 */
    .compare-wrapper {
      display: flex;
      gap: 30px;
    }
    .compare-col {
      flex: 1;
      padding: 32px;
      border-radius: var(--border-radius-card);
    }
    .compare-before {
      background: #2A2E38;
      color: #aaa;
    }
    .compare-after {
      background: var(--dark-blue-gray);
      border: 1px solid var(--competitive-red);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .compare-after .compare-item {
      color: var(--white);
    }
    .gold-check {
      color: var(--track-gold);
      margin-left: 8px;
    }
    @media (max-width: 768px) {
      .compare-wrapper {
        flex-direction: column;
      }
    }
    /* FAQ */
    .faq-item {
      background: var(--dark-blue-gray);
      border-radius: var(--border-radius-card);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--white);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      background: rgba(255,255,255,0.03);
      color: var(--light-text);
      padding: 0 24px;
    }
    .faq-answer p {
      padding-bottom: 20px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
    }
    /* 表单 */
    .contact-form {
      background: var(--soft-white);
      padding: 40px;
      border-radius: var(--border-radius-card);
      max-width: 520px;
      margin: 0 auto;
      color: var(--deep-black);
    }
    .contact-form input {
      width: 100%;
      padding: 14px;
      margin-bottom: 16px;
      border: 1px solid #ddd;
      border-radius: var(--border-radius-btn);
    }
    .submit-btn {
      width: 100%;
      background: var(--competitive-red);
      color: white;
      border: none;
      padding: 14px;
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      cursor: pointer;
    }
    .trust-note {
      text-align: center;
      font-size: 0.8rem;
      color: #666;
      margin-top: 12px;
    }
    footer {
      background: #05080f;
      padding: 40px 0;
      text-align: center;
      color: var(--text-gray);
    }
    .footer-links a {
      color: var(--text-gray);
      margin: 0 12px;
      text-decoration: none;
    }