/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --primary-red: #E63946;
      --primary-red-dark: #C1121F;
      --deep-black: #0B0C10;
      --champion-gold: #F4A261;
      --dark-gold: #E9C46A;
      --surface-card: rgba(31, 40, 51, 0.7);
      --surface-border: rgba(244, 162, 97, 0.15);
      --text-white: #FFFFFF;
      --text-light-gray: #C5C6C7;
      --success-green: #2A9D8F;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --glow-red: 0 0 20px rgba(230, 57, 70, 0.5);
      --glow-red-hover: 0 0 35px rgba(230, 57, 70, 0.8);
      --radius-lg: 16px;
      --radius-pill: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
      --font-num: "Inter", "Roboto", sans-serif;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-black);
      color: var(--text-light-gray);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      color: var(--text-white);
      font-weight: 700;
    }
    h1 {
      font-size: 48px;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    h2 {
      font-size: 36px;
      margin-bottom: 24px;
    }
    h3 {
      font-size: 20px;
      font-weight: 600;
    }
    p {
      max-width: 680px;
      color: var(--text-light-gray);
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    img {
      max-width: 100%;
      display: block;
    }
    section {
      padding: 120px 0;
    }
    @media (max-width: 767px) {
      section {
        padding: 80px 0;
      }
      h1 {
        font-size: 36px;
      }
      h2 {
        font-size: 28px;
      }
    }
    /* 导航 PC */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      z-index: 1000;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(244,162,97,0.1);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-white);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      background: linear-gradient(135deg, var(--primary-red), var(--champion-gold));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-white);
      font-weight: 500;
      position: relative;
      padding: 8px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-red);
      transition: width 0.3s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .nav-links a.active {
      color: var(--primary-red);
    }
    .nav-cta {
      background: var(--primary-red);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      box-shadow: var(--glow-red);
      transition: all 0.3s;
      margin-left: 24px;
    }
    .nav-cta:hover {
      background: var(--primary-red-dark);
      box-shadow: var(--glow-red-hover);
      transform: scale(1.03);
    }
    .mobile-menu-icon {
      display: none;
      font-size: 24px;
      color: white;
      cursor: pointer;
    }
    /* 移动端底部胶囊导航 */
    .mobile-bottom-nav {
      display: none;
    }
    @media (max-width: 767px) {
      .nav-links, .nav-cta {
        display: none;
      }
      .mobile-menu-icon {
        display: block;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 16px;
        left: 16px;
        right: 16px;
        background: rgba(31, 40, 51, 0.9);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: 28px;
        padding: 8px 16px;
        justify-content: space-around;
        z-index: 1000;
        border: 1px solid rgba(244,162,97,0.2);
      }
      .mobile-bottom-nav a {
        display: flex;
        flex-direction: column;
        align-items: center;
        color: var(--text-white);
        font-size: 10px;
        padding: 4px 8px;
        border-radius: 20px;
        transition: 0.2s;
      }
      .mobile-bottom-nav a i {
        font-size: 18px;
        margin-bottom: 2px;
      }
      .mobile-bottom-nav a.active {
        background: var(--primary-red);
        color: white;
      }
    }
    /* Hero */
    .hero {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 100vh;
      padding-top: 100px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(11,12,16,0.75);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      flex: 1;
    }
    .hero-title {
      font-size: 48px;
      font-weight: 700;
      background: linear-gradient(to right, #fff, #E63946, #F4A261);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: #ddd;
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-red);
      color: white;
      padding: 14px 40px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      box-shadow: var(--glow-red);
      transition: 0.3s;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-red-dark);
      box-shadow: var(--glow-red-hover);
      transform: scale(1.03);
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid white;
      color: white;
      padding: 14px 40px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      transition: 0.3s;
      display: inline-block;
      text-align: center;
    }
    .btn-secondary:hover {
      background: rgba(255,255,255,0.1);
    }
    .hero-mockup {
      position: relative;
      z-index: 2;
      flex: 1;
      display: flex;
      justify-content: center;
      animation: float 4s ease-in-out infinite;
    }
    .hero-mockup img {
      max-height: 550px;
      border-radius: 32px;
      border: 2px solid rgba(244,162,97,0.2);
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
    }
    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
      100% { transform: translateY(0); }
    }
    @media (max-width: 767px) {
      .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
      }
      .hero-mockup img {
        max-height: 300px;
        margin-top: 40px;
      }
      .hero-buttons {
        justify-content: center;
      }
    }
    /* 优势交错卡片 */
    .advantage-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 80px;
      background: var(--surface-card);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: var(--radius-lg);
      border: 1px solid var(--surface-border);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .adv-text {
      flex: 1;
    }
    .adv-img {
      flex: 1.2;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid rgba(244,162,97,0.25);
    }
    .adv-img img {
      width: 100%;
      height: auto;
    }
    .row-reverse {
      flex-direction: row-reverse;
    }
    @media (max-width: 767px) {
      .advantage-row, .row-reverse {
        flex-direction: column;
      }
    }
    /* 数据条带 */
    .stats-strip {
      background: rgba(230, 57, 70, 0.08);
      border-top: 1px solid rgba(230,57,70,0.3);
      border-bottom: 1px solid rgba(230,57,70,0.3);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      text-align: center;
      gap: 24px;
    }
    .stat-number {
      font-family: var(--font-num);
      font-size: 56px;
      font-weight: 800;
      color: var(--champion-gold);
      text-shadow: 0 0 10px rgba(244,162,97,0.4);
    }
    .stat-label {
      color: white;
      margin-top: 8px;
    }
    .stat-line {
      width: 40px;
      height: 2px;
      background: var(--primary-red);
      margin: 12px auto 0;
    }
    @media (max-width: 767px) {
      .stats-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }
    /* 下载引导 */
    .download-area {
      text-align: center;
    }
    .store-buttons {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin: 32px 0;
    }
    .store-btn {
      background: rgba(31,40,51,0.8);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 16px;
      padding: 16px 32px;
      display: flex;
      align-items: center;
      gap: 12px;
      color: white;
    }
    .mockup-wide {
      margin-top: 40px;
      border-radius: 24px;
      border: 1px solid rgba(244,162,97,0.2);
      transform: perspective(800px) rotateY(-3deg);
    }
    /* FAQ */
    .faq-item {
      background: rgba(31,40,51,0.4);
      border-radius: 12px;
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: white;
    }
    .faq-answer {
      padding: 0 20px 20px;
      display: none;
      color: #C5C6C7;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-question {
      color: var(--primary-red);
    }
    /* Footer */
    .footer {
      background: #06070A;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(244,162,97,0.1);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: #aaa;
      display: block;
      margin-bottom: 8px;
    }
    .footer a:hover {
      color: var(--primary-red);
    }
    .copyright {
      text-align: center;
      margin-top: 40px;
      color: #666;
    }
    @media (max-width: 767px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }