/* roulang page: index */
:root {
      --deep-black: #0A0E17;
      --neon-green: #00E676;
      --dark-blue: #1E2A3A;
      --accent-red: #FF3D00;
      --text-gray: #B0B8C1;
      --dark-text: #1A1A2E;
      --divider: #2A3340;
      --soft-bg: #F5F6F8;
      --white: #FFFFFF;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-mono: "DIN Alternate", "Roboto Mono", monospace;
      --shadow-light: 0 4px 20px rgba(0,0,0,0.08);
      --shadow-dark: 0 4px 20px rgba(0,0,0,0.3);
      --radius-card: 12px;
      --radius-btn: 8px;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--soft-bg);
      color: var(--dark-text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      z-index: 1000;
      transition: var(--transition-smooth);
      background: transparent;
    }

    .navbar.scrolled {
      background: rgba(10, 14, 23, 0.92);
      backdrop-filter: blur(20px);
      box-shadow: 0 4px 24px rgba(0,0,0,0.2);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: -0.5px;
      text-decoration: none;
    }

    .logo-dot {
      width: 12px;
      height: 12px;
      background: var(--neon-green);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 12px var(--neon-green);
    }

    .nav-links {
      display: flex;
      gap: 36px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-gray);
      text-decoration: none;
      font-size: 16px;
      font-weight: 500;
      transition: var(--transition-smooth);
      position: relative;
    }

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

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--neon-green);
      transition: width 0.3s ease;
    }

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

    .btn-nav {
      padding: 12px 28px;
      border: 1.5px solid var(--neon-green);
      color: var(--neon-green);
      background: transparent;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }

    .btn-nav:hover {
      background: rgba(0, 230, 118, 0.15);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      z-index: 1001;
    }

    .hamburger span {
      width: 28px;
      height: 2px;
      background: var(--white);
      transition: var(--transition-smooth);
    }

    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 100%;
      height: 100vh;
      background: var(--deep-black);
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 40px;
      transition: right 0.4s ease;
      z-index: 999;
    }

    .mobile-menu.active {
      right: 0;
    }

    .mobile-menu a {
      color: var(--white);
      font-size: 24px;
      font-weight: 600;
      text-decoration: none;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #0A0E17 0%, #1A2A40 100%);
      display: flex;
      align-items: center;
      padding-top: 72px;
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      width: 100%;
    }

    .hero-left {
      z-index: 2;
    }

    .tag {
      display: inline-block;
      background: var(--neon-green);
      color: var(--deep-black);
      padding: 8px 20px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 28px;
    }

    h1 {
      font-size: 56px;
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -1px;
      color: var(--white);
      margin-bottom: 24px;
    }

    h1 .highlight {
      color: var(--neon-green);
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-gray);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 460px;
    }

    .hero-buttons {
      display: flex;
      gap: 18px;
      margin-bottom: 48px;
    }

    .btn-primary {
      background: var(--neon-green);
      color: var(--deep-black);
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 16px;
      border: none;
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      background: #00C853;
      transform: scale(1.03);
    }

    .btn-secondary {
      background: transparent;
      color: var(--neon-green);
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      border: 1.5px solid var(--neon-green);
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }

    .btn-secondary:hover {
      background: rgba(0, 230, 118, 0.1);
    }

    .btn-accent {
      background: var(--accent-red);
      color: var(--white);
      padding: 18px 42px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 18px;
      border: none;
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }

    .btn-accent:hover {
      background: #e03500;
      transform: scale(1.03);
    }

    .hero-stats {
      display: flex;
      gap: 40px;
    }

    .stat-item {
      display: flex;
      flex-direction: column;
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 28px;
      font-weight: 700;
      color: var(--accent-red);
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-gray);
    }

    .hero-right {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hero-image-wrapper {
      width: 100%;
      height: 500px;
      border-radius: 20px;
      overflow: hidden;
      position: relative;
      box-shadow: var(--shadow-dark);
    }

    .hero-image-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      animation: fadeInScale 1s ease-out;
    }

    @keyframes fadeInScale {
      0% { opacity: 0; transform: scale(1.1); }
      100% { opacity: 1; transform: scale(1); }
    }

    .live-card {
      position: absolute;
      bottom: 30px;
      right: -20px;
      background: rgba(30, 42, 58, 0.9);
      backdrop-filter: blur(12px);
      padding: 20px 28px;
      border-radius: 16px;
      border: 1px solid rgba(0,230,118,0.3);
      color: white;
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .live-score {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 700;
      color: var(--neon-green);
    }

    .pulse {
      width: 10px;
      height: 10px;
      background: var(--accent-red);
      border-radius: 50%;
      animation: pulseAnim 1.5s infinite;
    }

    @keyframes pulseAnim {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.2); }
    }

    /* 板块通用 */
    section {
      padding: 120px 0;
    }

    h2 {
      font-size: 36px;
      font-weight: 600;
      letter-spacing: -0.5px;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

    .section-sub {
      color: #5A6A7E;
      font-size: 18px;
      margin-bottom: 60px;
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--white);
      padding: 36px 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-light);
      transition: var(--transition-smooth);
    }

    .feature-card.wide {
      grid-column: span 2;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0,0,0,0.15);
      border: 1px solid var(--neon-green);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      background: #E8F5E9;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 24px;
    }

    h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .feature-card p {
      color: #5A6A7E;
      font-size: 15px;
      line-height: 1.7;
    }

    /* 数据面板 */
    .data-panel {
      background: var(--deep-black);
      color: white;
      padding: 100px 0;
    }

    .data-panel h2, .data-panel .section-sub {
      color: white;
    }

    .scroll-horizontal {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scrollbar-width: thin;
      scrollbar-color: var(--neon-green) var(--dark-blue);
    }

    .scroll-horizontal::-webkit-scrollbar {
      height: 6px;
    }

    .scroll-horizontal::-webkit-scrollbar-track {
      background: var(--dark-blue);
      border-radius: 6px;
    }

    .scroll-horizontal::-webkit-scrollbar-thumb {
      background: var(--neon-green);
      border-radius: 6px;
    }

    .data-card {
      min-width: 260px;
      background: var(--dark-blue);
      padding: 28px 24px;
      border-radius: var(--radius-card);
      display: flex;
      flex-direction: column;
      gap: 16px;
      transition: var(--transition-smooth);
    }

    .data-card:hover {
      background: #253544;
      border: 1px solid rgba(0,230,118,0.4);
    }

    .match-teams {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 18px;
    }

    .match-score {
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 700;
      color: var(--neon-green);
    }

    .live-badge {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--accent-red);
    }

    /* 方案对比 */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .plan-card {
      background: var(--dark-blue);
      color: white;
      padding: 48px 40px;
      border-radius: var(--radius-card);
      position: relative;
    }

    .plan-card.recommended {
      border-left: 4px solid var(--neon-green);
    }

    .plan-badge {
      position: absolute;
      top: 24px;
      right: 24px;
      background: var(--neon-green);
      color: var(--deep-black);
      padding: 6px 18px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 13px;
    }

    .plan-title {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 32px;
    }

    .plan-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-bottom: 48px;
    }

    .plan-features li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 16px;
      border-bottom: 1px solid var(--divider);
      padding-bottom: 12px;
    }

    .text-center {
      text-align: center;
      margin-top: 48px;
    }

    /* 案例瀑布流 */
    .masonry {
      columns: 3;
      column-gap: 24px;
    }

    .case-card {
      break-inside: avoid;
      margin-bottom: 24px;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-light);
      transition: var(--transition-smooth);
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0,0,0,0.12);
    }

    .case-card img {
      width: 100%;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 24px;
    }

    .case-stat {
      color: var(--accent-red);
      font-weight: 700;
      margin-top: 12px;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .faq-item {
      border-bottom: 1px solid #D0D7DE;
      padding: 20px 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 18px;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      color: #5A6A7E;
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 16px;
    }

    .arrow-icon {
      transition: transform 0.3s ease;
    }

    .faq-item.active .arrow-icon {
      transform: rotate(180deg);
    }

    /* CTA横幅 */
    .cta-band {
      background: var(--deep-black);
      position: relative;
      overflow: hidden;
      padding: 100px 0;
      text-align: center;
    }

    .cta-band::before {
      content: '';
      position: absolute;
      width: 400px;
      height: 400px;
      background: rgba(0,230,118,0.15);
      border-radius: 50%;
      filter: blur(80px);
      top: -100px;
      left: -100px;
    }

    .cta-band h2 {
      color: white;
    }

    .cta-band .section-sub {
      color: var(--text-gray);
    }

    /* 页脚 */
    footer {
      background: var(--dark-blue);
      color: var(--text-gray);
      padding: 80px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 60px;
    }

    .footer-brand p {
      margin-top: 16px;
      font-size: 14px;
    }

    .footer-col h4 {
      color: white;
      margin-bottom: 20px;
      font-size: 16px;
    }

    .footer-col a {
      display: block;
      color: var(--text-gray);
      text-decoration: none;
      margin-bottom: 12px;
      font-size: 14px;
      transition: color 0.2s;
    }

    .footer-col a:hover {
      color: var(--neon-green);
    }

    .footer-bottom {
      border-top: 1px solid var(--divider);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      h1 { font-size: 42px; }
      .features-grid { grid-template-columns: repeat(2,1fr); }
      .feature-card.wide { grid-column: span 1; }
      .masonry { columns: 2; }
      .compare-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero { padding: 100px 0 40px; }
      h1 { font-size: 34px; }
      .hero-buttons { flex-direction: column; }
      .features-grid { grid-template-columns: 1fr; }
      .masonry { columns: 1; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
      section { padding: 70px 0; }
    }