/* roulang page: index */
:root {
      --red: #E60012;
      --gold: #C9A84C;
      --black: #1A1A1A;
      --white: #F8F8F8;
      --gray-text: #4A4A4A;
      --light-gray: #888888;
      --border-light: #E5E5E5;
      --success: #00A86B;
      --warning: #FF8C00;
      --link-blue: #2563EB;
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-input: 8px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --font-numbers: 'DIN Alternate', 'Roboto', sans-serif;
      --font-system: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --container-max: 1200px;
      --nav-height: 64px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-system);
      background-color: #ffffff;
      color: var(--gray-text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: #ffffff;
      z-index: 1000;
      box-shadow: 0 2px 12px rgba(0,0,0,0.02);
      transition: box-shadow 0.3s ease;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: var(--black);
      letter-spacing: 1px;
    }
    .logo-icon {
      width: 24px;
      height: 24px;
      background: var(--red);
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
      display: inline-block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--gray-text);
      padding: 8px 0;
      border-bottom: 3px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--red);
      border-bottom-color: var(--red);
    }
    .btn-nav {
      background: var(--red);
      color: #fff !important;
      padding: 10px 20px !important;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: background 0.2s, transform 0.1s;
      white-space: nowrap;
    }
    .btn-nav:hover {
      background: #cc0010;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 25px;
      height: 2px;
      background: var(--black);
      border-radius: 2px;
      transition: 0.3s;
    }
    @media (max-width: 1024px) {
      .nav-links {
        gap: 20px;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: var(--nav-height);
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: calc(100vh - var(--nav-height));
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        padding: 32px 24px;
        gap: 24px;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
      }
      .nav-links.active {
        right: 0;
      }
      .hamburger {
        display: flex;
      }
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 48px 0;
      }
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--black);
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 40px;
      height: 4px;
      background: var(--red);
      margin-top: 8px;
    }
    /* Hero */
    .hero {
      background: var(--black);
      color: #fff;
      padding: 120px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -20%;
      left: -10%;
      width: 60%;
      height: 140%;
      background: radial-gradient(circle at center, rgba(230,0,18,0.18) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
      position: relative;
      z-index: 2;
    }
    .hero-left {
      flex: 1 1 50%;
    }
    .hero-right {
      flex: 1 1 50%;
      display: flex;
      justify-content: center;
    }
    .hero h1 {
      font-size: 36px;
      font-weight: 700;
      color: #fff;
      line-height: 1.2;
      margin-bottom: 16px;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--red), var(--gold));
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 16px;
      border: none;
      cursor: pointer;
      transition: filter 0.2s, transform 0.1s;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      transform: scale(0.97);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--red);
      color: var(--red);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background 0.2s;
    }
    .btn-outline:hover {
      background: rgba(230,0,18,0.1);
    }
    .hero-badges {
      display: flex;
      gap: 24px;
      margin-top: 40px;
      flex-wrap: wrap;
    }
    .badge-circle {
      width: 88px;
      height: 88px;
      border-radius: 50%;
      background: rgba(0,0,0,0.55);
      border: 2px solid var(--gold);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      color: var(--gold);
      font-weight: 700;
      font-size: 18px;
      font-family: var(--font-numbers);
    }
    .badge-circle small {
      font-size: 12px;
      color: #ccc;
      font-weight: 400;
      font-family: var(--font-system);
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
        text-align: center;
      }
      .hero h1 {
        font-size: 26px;
      }
      .hero-buttons {
        justify-content: center;
      }
      .hero-badges {
        justify-content: center;
      }
    }
    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 32px;
    }
    .stat-card {
      background: var(--white);
      padding: 32px 16px;
      text-align: center;
      border-radius: var(--radius-card);
      transition: transform 0.2s;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--gold);
      font-family: var(--font-numbers);
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--light-gray);
    }
    .stat-line {
      width: 30px;
      height: 2px;
      background: var(--red);
      margin: 12px auto 0;
    }
    @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;
      margin-top: 32px;
    }
    .service-card {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--red);
    }
    .service-card.featured {
      background: var(--black);
      color: #fff;
      border-color: var(--gold);
    }
    .service-card.featured h3,
    .service-card.featured p {
      color: #fff;
    }
    .service-icon {
      font-size: 32px;
      color: var(--red);
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-link {
      color: var(--red);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 16px;
    }
    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 注册流程 */
    .steps-container {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 40px;
      margin-top: 40px;
      flex-wrap: wrap;
    }
    .step-item {
      text-align: center;
      flex: 1;
      min-width: 180px;
    }
    .step-number {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--red);
      color: #fff;
      font-weight: 700;
      font-size: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
    }
    .step-arrow {
      color: var(--gold);
      font-size: 24px;
      font-weight: 300;
    }
    .compare-box {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 24px;
      margin-top: 32px;
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    .compare-col {
      flex: 1;
    }
    .compare-col h4 {
      margin-bottom: 12px;
    }
    @media (max-width: 768px) {
      .steps-container {
        flex-direction: column;
        gap: 24px;
      }
      .step-arrow {
        transform: rotate(90deg);
      }
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 32px auto 0;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      font-size: 18px;
      font-weight: 600;
      text-align: left;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      padding: 8px 0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--gray-text);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 8px;
    }
    /* CTA 表单 */
    .cta-card {
      background: var(--black);
      border: 1px solid var(--gold);
      border-radius: var(--radius-card);
      max-width: 560px;
      margin: 32px auto 0;
      padding: 48px 32px;
      position: relative;
    }
    .cta-card form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .cta-card input {
      padding: 12px 16px;
      border-radius: var(--radius-input);
      border: 1px solid #ccc;
      font-size: 16px;
    }
    .btn-full {
      width: 100%;
    }
    /* 页脚 */
    .footer {
      background: var(--black);
      color: rgba(255,255,255,0.7);
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      margin-bottom: 32px;
    }
    .footer-bottom {
      border-top: 1px solid #333;
      padding-top: 16px;
      font-size: 12px;
      color: #888;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    button {
      cursor: pointer;
    }