/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --bg-deep: #0B0E17;
      --bg-card: #141B2D;
      --bg-glass: rgba(20, 27, 45, 0.7);
      --accent-cyan: #00E5FF;
      --accent-orange: #FF6B35;
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.7);
      --text-muted: rgba(255, 255, 255, 0.4);
      --border-sub: rgba(0, 229, 255, 0.15);
      --border-highlight: rgba(0, 229, 255, 0.5);
      --card-radius: 16px;
      --btn-radius: 8px;
      --glass-blur: blur(12px);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 12px 40px rgba(0, 229, 255, 0.15);
      --transition-smooth: all 0.3s ease;
    }

    body {
      background-color: var(--bg-deep);
      color: var(--text-primary);
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Inter", sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      margin: 0;
      padding: 0;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(11, 14, 23, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-sub);
      transition: background 0.3s ease, border-color 0.3s ease;
    }
    .site-header.scrolled {
      background: rgba(11, 14, 23, 0.95);
      border-bottom-color: rgba(0, 229, 255, 0.25);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 0;
      height: 70px;
    }
    .logo {
      display: flex;
      align-items: center;
      text-decoration: none;
      font-size: 24px;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: 1px;
    }
    .logo i {
      color: var(--accent-cyan);
      margin-right: 10px;
      font-size: 28px;
      text-shadow: 0 0 10px rgba(0,229,255,0.5);
    }
    .logo span {
      background: linear-gradient(to right, #fff, #00E5FF);
      -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-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 15px;
      transition: color 0.2s;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
      border-bottom-color: var(--accent-cyan);
    }
    .btn-primary-nav {
      background: var(--accent-cyan);
      color: #0B0E17 !important;
      font-weight: 700;
      padding: 10px 22px !important;
      border-radius: var(--btn-radius);
      transition: var(--transition-smooth);
      border: none !important;
      box-shadow: 0 0 15px rgba(0,229,255,0.4);
    }
    .btn-primary-nav:hover {
      background: #33EAFF;
      box-shadow: 0 0 25px rgba(0,229,255,0.7);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--text-primary);
      font-size: 26px;
      cursor: pointer;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(8, 10, 18, 0.98);
      backdrop-filter: blur(25px);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 36px;
      z-index: 60;
    }
    .mobile-menu a {
      color: #fff;
      font-size: 24px;
      font-weight: 600;
      text-decoration: none;
      transition: color 0.2s;
    }
    .mobile-menu a:hover {
      color: var(--accent-cyan);
    }
    .mobile-menu .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      font-size: 32px;
      background: none;
      border: none;
      color: #fff;
    }

    /* 板块共用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      font-size: 36px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #fff;
    }
    .section-title p {
      color: var(--text-secondary);
      font-size: 18px;
      max-width: 640px;
      margin: 16px auto 0;
    }

    /* 首屏Hero */
    .hero {
      display: flex;
      align-items: center;
      gap: 48px;
      padding-top: 60px;
      padding-bottom: 100px;
      min-height: 85vh;
    }
    .hero-content {
      flex: 1;
    }
    .hero-content h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      color: #fff;
    }
    .hero-content h1 span {
      color: var(--accent-cyan);
      text-shadow: 0 0 15px rgba(0,229,255,0.4);
    }
    .hero-content .subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 36px;
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-block;
      padding: 14px 32px;
      font-weight: 700;
      border-radius: var(--btn-radius);
      text-decoration: none;
      transition: var(--transition-smooth);
      font-size: 16px;
      text-align: center;
    }
    .btn-cta {
      background: var(--accent-cyan);
      color: #0B0E17;
      box-shadow: 0 0 25px rgba(0,229,255,0.45);
    }
    .btn-cta:hover {
      background: #33EAFF;
      box-shadow: 0 0 40px rgba(0,229,255,0.8);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.1);
      border-color: #33EAFF;
    }
    .hero-visual {
      flex: 1;
      text-align: right;
    }
    .hero-visual img {
      max-width: 100%;
      height: auto;
      border-radius: 24px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
      border: 1px solid var(--border-sub);
    }

    /* 优势卡片网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--bg-glass);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--border-sub);
      border-radius: var(--card-radius);
      padding: 32px 28px;
      transition: var(--transition-smooth);
    }
    .feature-card:hover {
      border-color: var(--border-highlight);
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }
    .feature-icon {
      font-size: 38px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .feature-card p {
      color: var(--text-secondary);
      font-size: 15px;
    }

    /* 社区亮点 - 杂志分栏 */
    .magazine-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr;
      gap: 24px;
    }
    .main-card {
      background: var(--bg-card);
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid #1E2A45;
      display: flex;
      flex-direction: column;
    }
    .main-card img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }
    .main-card-body {
      padding: 24px;
    }
    .side-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      grid-template-rows: 1fr 1fr;
      gap: 20px;
    }
    .side-card {
      background: var(--bg-card);
      border-radius: 12px;
      padding: 20px;
      border: 1px solid #1E2A45;
      transition: 0.2s;
    }
    .side-card:hover {
      border-color: var(--accent-cyan);
    }

    /* 案例瀑布 */
    .cases-masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .case-item {
      background: #141B2D;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid #1E2A45;
      transition: all 0.25s;
    }
    .case-item:hover {
      transform: translateY(-6px);
      border-color: var(--accent-cyan);
    }
    .case-item img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .case-info {
      padding: 16px;
    }

    /* 版本对比 */
    .pricing-table {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .plan {
      background: #141B2D;
      border: 1px solid #1E2A45;
      border-radius: 16px;
      padding: 36px;
      width: 280px;
    }
    .plan.recommended {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 30px rgba(0,229,255,0.2);
      position: relative;
    }

    /* FAQ */
    .faq-list {
      max-width: 760px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 20px 0;
    }

    /* 页脚 */
    .footer {
      background: #0A0D14;
      border-top: 1px solid var(--border-sub);
      padding: 50px 0 30px;
    }

    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .hero { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .features-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 36px; }
      .magazine-layout { grid-template-columns: 1fr; }
      .cases-masonry { grid-template-columns: 1fr; }
    }