/* roulang page: index */
:root {
      --deep-blue: #0B0F19;
      --gold: #D4A843;
      --cold-white: #F0F2F5;
      --blue-gray: #1A1F2E;
      --electric-blue: #2E86DE;
      --success-green: #1DB954;
      --text-light: #E8ECF1;
      --text-muted: #B0B8C1;
      --card-glass-bg: rgba(26, 31, 46, 0.55);
      --card-glass-border: rgba(212, 168, 67, 0.2);
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.08);
      --shadow-gold: 0 0 24px rgba(212,168,67,0.6);
      --radius-lg: 1.25rem;
      --radius-md: 0.75rem;
      --transition: 0.3s ease;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
      --font-number: "DIN Alternate", "PingFang SC", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--deep-blue);
      color: var(--text-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    /* 玻璃拟态工具类 */
    .glass-card {
      background: var(--card-glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--card-glass-border);
      border-radius: var(--radius-lg);
    }

    .white-card {
      background: #FFFFFF;
      box-shadow: var(--shadow-sm);
      border-radius: var(--radius-lg);
      color: #1E2636;
    }

    /* 按钮体系 */
    .btn-primary {
      background: var(--gold);
      color: var(--deep-blue);
      font-weight: 600;
      padding: 0.875rem 2rem;
      border-radius: 0.5rem;
      display: inline-block;
      transition: all var(--transition);
      border: 1px solid transparent;
      text-align: center;
      letter-spacing: 0.02em;
    }

    .btn-primary:hover {
      background: #e5b84c;
      box-shadow: var(--shadow-gold);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--gold);
      border: 1.5px solid var(--gold);
      font-weight: 600;
      padding: 0.875rem 2rem;
      border-radius: 0.5rem;
      display: inline-block;
      transition: all var(--transition);
      text-align: center;
    }

    .btn-outline:hover {
      background: rgba(212, 168, 67, 0.08);
      border-color: #e5b84c;
      color: #e5b84c;
    }

    .btn-glow {
      animation: glowPulse 2.4s infinite alternate;
    }

    @keyframes glowPulse {
      0% { box-shadow: 0 0 8px rgba(212,168,67,0.4); }
      100% { box-shadow: 0 0 28px rgba(212,168,67,0.8); }
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 50;
      backdrop-filter: blur(16px);
      background: rgba(11, 15, 25, 0.75);
      border-bottom: 1px solid rgba(212, 168, 67, 0.15);
      height: 64px;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }

    .logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--gold);
      display: flex;
      align-items: center;
      gap: 0.25rem;
      letter-spacing: 0.5px;
    }
    .logo-icon {
      font-size: 1.8rem;
      line-height: 1;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      font-weight: 500;
    }

    .nav-links a {
      color: var(--cold-white);
      font-size: 0.95rem;
      position: relative;
      padding: 0.25rem 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width var(--transition);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--gold);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .menu-toggle span {
      width: 24px;
      height: 2px;
      background: var(--gold);
      transition: 0.3s;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      background: radial-gradient(circle at 80% 20%, #1a2332 0%, var(--deep-blue) 70%);
      padding-top: 64px;
    }

    .hero-bg-animation {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      z-index: 0;
      pointer-events: none;
    }

    .floating-particles {
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(212,168,67,0.2) 0%, transparent 40%),
                  radial-gradient(circle at 70% 70%, rgba(46,134,222,0.15) 0%, transparent 50%);
      animation: floatMove 8s infinite alternate ease-in-out;
    }

    @keyframes floatMove {
      0% { transform: scale(1) translate(0,0); opacity: 0.6; }
      100% { transform: scale(1.1) translate(-20px, -20px); opacity: 0.9; }
    }

    .hero-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      align-items: center;
      position: relative;
      z-index: 2;
      width: 100%;
    }

    .hero-text h1 {
      font-family: var(--font-heading);
      font-size: clamp(2.4rem, 5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(135deg, #F5D572 0%, #D4A843 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.5rem;
    }

    .hero-sub {
      font-size: 1.1rem;
      color: #C8D6E5;
      max-width: 480px;
      margin-bottom: 2rem;
    }

    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .hero-visual {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .dashboard-mock {
      width: 100%;
      max-width: 450px;
      background: rgba(20, 28, 45, 0.7);
      backdrop-filter: blur(8px);
      border-radius: 2rem;
      padding: 1.5rem;
      border: 1px solid rgba(212,168,67,0.25);
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }

    .stat-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 1.2rem;
    }

    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 2rem;
      color: var(--gold);
      font-weight: 700;
    }
    .stat-label {
      font-size: 0.7rem;
      color: #9aa9b9;
      text-transform: uppercase;
    }

    /* 板块标题 */
    .section-title {
      font-family: var(--font-heading);
      font-size: 2rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 0.75rem;
      color: var(--cold-white);
    }

    .section-sub {
      text-align: center;
      color: #A0B0C0;
      max-width: 650px;
      margin: 0 auto 3rem auto;
    }

    .dark-section {
      background-color: #0E1320;
    }

    .light-section {
      background-color: var(--cold-white);
      color: #1A1F2E;
    }

    .light-section .section-title {
      color: #0B0F19;
    }
    .light-section .section-sub {
      color: #4A5568;
    }

    /* 核心优势 非对称栅格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .feature-card {
      padding: 2rem 1.5rem;
      transition: all 0.3s;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      border-color: var(--gold);
      box-shadow: 0 12px 30px rgba(0,0,0,0.6);
    }

    .feature-icon {
      font-size: 2.2rem;
      color: var(--gold);
      margin-bottom: 1.2rem;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      margin-bottom: 0.5rem;
      font-weight: 600;
    }

    /* 功能分组 垂直堆叠侧边索引 */
    .func-group {
      display: flex;
      gap: 2.5rem;
      margin-bottom: 4rem;
    }

    .func-index {
      writing-mode: vertical-rl;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--gold);
      letter-spacing: 3px;
    }

    .func-details {
      flex: 1;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }

    .func-image img {
      border-radius: 1rem;
      object-fit: cover;
      height: 200px;
      width: 100%;
    }

    /* 场景卡片错落 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 2rem;
    }

    .scenario-card {
      padding: 2rem;
      transition: 0.2s;
    }
    .scenario-card:nth-child(2) {
      margin-top: 2rem;
    }

    /* 案例数据 */
    .stats-highlight {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      margin: 2rem 0;
    }

    .big-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      color: var(--gold);
    }

    /* 定价卡 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
      align-items: center;
    }

    .pricing-card {
      padding: 2.5rem 2rem;
      text-align: center;
    }
    .pricing-card.recommended {
      transform: scale(1.05);
      border: 2px solid var(--gold);
      background: rgba(30, 36, 52, 0.8);
      position: relative;
    }
    .badge {
      background: var(--gold);
      color: #0B0F19;
      padding: 0.2rem 1rem;
      border-radius: 20px;
      font-size: 0.7rem;
      font-weight: 700;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 1.2rem 0;
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      color: var(--cold-white);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: #B0B8C1;
    }

    /* CTA 横幅 */
    .cta-band {
      background: #0B0F19;
      padding: 4rem 0;
      text-align: center;
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-content { grid-template-columns: 1fr; }
      .hero-visual { order: -1; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: flex; }
      .mobile-menu.active { display: flex; }
      .pricing-grid, .scenarios-grid, .footer-grid { grid-template-columns: 1fr; }
      .func-details { grid-template-columns: 1fr; }
      .func-group { flex-direction: column; }
      .func-index { writing-mode: horizontal-tb; }
      .scenario-card:nth-child(2) { margin-top: 0; }
    }