/* roulang page: index */
:root {
      --primary: #FF4D2E;
      --primary-hover: #FF6B4A;
      --primary-glow: rgba(255, 77, 46, 0.6);
      --deep-black: #0B0E14;
      --deep-gray: #11161F;
      --crystal-blue: #1A2A44;
      --ice-white: #F0F3FA;
      --ice-white-80: rgba(240, 243, 250, 0.8);
      --ice-white-30: rgba(240, 243, 250, 0.3);
      --gold: #F5A623;
      --gold-soft: rgba(245, 166, 35, 0.7);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-light: rgba(255, 255, 255, 0.25);
      --radius-card: 18px;
      --radius-btn: 28px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --transition-smooth: all 0.25s cubic-bezier(0.25,0.8,0.25,1.2);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', '苹方', '雅黑', system-ui, -apple-system, sans-serif;
      background-color: var(--deep-black);
      color: var(--ice-white-80);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    button, input, select, textarea {
      font-family: inherit;
    }

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(11, 14, 24, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(rgba(255,77,46,0.2), transparent);
      background-position: bottom;
      background-size: 100% 1px;
      background-repeat: no-repeat;
      z-index: 1000;
      transition: background 0.3s, box-shadow 0.3s;
    }
    .nav.scrolled {
      background: rgba(11, 14, 24, 0.96);
      box-shadow: 0 8px 24px rgba(0,0,0,0.6), 0 0 20px rgba(255,77,46,0.3);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      padding: 0 24px;
      max-width: 1280px;
      margin: 0 auto;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--ice-white);
      letter-spacing: 1px;
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--primary);
      filter: drop-shadow(0 0 8px var(--primary-glow));
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--ice-white-80);
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s;
    }
    .nav-links a:hover {
      color: var(--ice-white);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      background: var(--primary);
      color: var(--ice-white);
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      letter-spacing: 0.5px;
      box-shadow: 0 0 18px var(--primary-glow);
      margin-left: 12px;
    }
    .nav-cta:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 30px rgba(255,77,46,0.8);
      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(--ice-white);
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      height: calc(100vh - 72px);
      background: rgba(11,14,24,0.98);
      backdrop-filter: blur(20px);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      z-index: 999;
    }
    .mobile-menu.active {
      display: flex;
    }
    .mobile-menu a {
      font-size: 1.6rem;
      font-weight: 600;
      color: var(--ice-white);
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 70px 0;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, rgba(255,77,46,0.25) 0%, transparent 50%), 
                  radial-gradient(circle at 80% 20%, rgba(26,42,68,0.7) 0%, transparent 55%),
                  var(--deep-black);
      position: relative;
      overflow: hidden;
      padding-top: 72px;
    }
    .hero-glow {
      position: absolute;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(255,77,46,0.35) 0%, transparent 70%);
      filter: blur(100px);
      top: 10%;
      left: -10%;
      animation: float 12s infinite alternate;
    }
    .hero-glow-right {
      right: -5%;
      left: auto;
      background: radial-gradient(circle, rgba(26,42,68,0.8) 0%, transparent 70%);
    }
    @keyframes float {
      0% { transform: translate(0,0); }
      100% { transform: translate(30px, -30px); }
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
    }
    .hero-left {
      flex: 1 1 55%;
    }
    .hero-right {
      flex: 1 1 45%;
    }
    .hero h1 {
      font-size: clamp(2.8rem, 5vw, 3.6rem);
      font-weight: 800;
      line-height: 1.15;
      color: var(--ice-white);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 1.1rem;
      color: rgba(240,243,250,0.7);
      margin-bottom: 28px;
      max-width: 500px;
    }
    .hero-stats {
      display: flex;
      gap: 30px;
      margin-bottom: 32px;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--gold);
      line-height: 1.2;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--ice-white-80);
      letter-spacing: 0.3px;
    }
    .btn-glow {
      background: var(--primary);
      border: none;
      color: var(--ice-white);
      padding: 14px 38px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      letter-spacing: 0.5px;
      box-shadow: 0 0 28px var(--primary-glow);
      cursor: pointer;
      display: inline-block;
      transition: var(--transition-smooth);
    }
    .btn-glow:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 44px rgba(255,77,46,0.8);
      transform: scale(1.03);
    }
    .btn-outline {
      border: 2px solid var(--border-light);
      background: transparent;
      color: var(--ice-white);
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-left: 16px;
      cursor: pointer;
    }
    .btn-outline:hover {
      border-color: var(--ice-white);
      background: rgba(255,255,255,0.06);
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      height: 420px;
      width: 100%;
      position: relative;
      box-shadow: 0 20px 40px rgba(0,0,0,0.7);
    }
    .live-card {
      position: absolute;
      bottom: 20px;
      right: -15px;
      background: rgba(26,42,68,0.7);
      backdrop-filter: blur(18px);
      border: 1px solid var(--border-subtle);
      border-radius: 16px;
      padding: 14px 18px;
      color: white;
      transform: rotate(-2deg);
      box-shadow: var(--shadow-card);
    }

    /* 亮点 */
    .highlights {
      background: var(--deep-gray);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--ice-white);
      margin-bottom: 20px;
      text-align: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
      margin-top: 50px;
    }
    .glass-card {
      background: rgba(26,42,68,0.45);
      backdrop-filter: blur(18px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(255,77,46,0.25);
    }
    .big-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--gold);
      line-height: 1.1;
    }

    /* 案例瀑布 */
    .cases {
      background: var(--deep-black);
    }
    .masonry {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .case-card img {
      height: 200px;
      object-fit: cover;
      border-radius: 14px 14px 0 0;
    }

    /* 对比表 */
    .compare {
      background: var(--deep-gray);
    }
    .table-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .plan-highlight {
      border: 1px solid var(--primary);
      box-shadow: 0 0 28px rgba(255,77,46,0.35);
    }

    /* FAQ */
    .faq {
      background: var(--deep-black);
    }
    .accordion {
      max-width: 800px;
      margin: 40px auto 0;
    }

    /* 联系 */
    .contact {
      background: var(--deep-gray);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    /* 页脚 */
    .footer {
      background: var(--deep-black);
      border-top: 1px solid var(--primary);
      padding: 50px 0 30px;
    }

    @media (max-width: 1023px) {
      .hero-grid { flex-direction: column; }
      .grid-3, .masonry, .table-grid { grid-template-columns: repeat(2,1fr); }
      .form-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 767px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .grid-3, .masonry, .table-grid { grid-template-columns: 1fr; }
    }