/* roulang page: index */
:root {
      --primary: #00E676;
      --primary-glow: rgba(0, 230, 118, 0.6);
      --accent: #D500F9;
      --bg-deep: #0D0618;
      --bg-section: #1A0A2E;
      --card-bg: rgba(255, 255, 255, 0.03);
      --text-primary: #FFFFFF;
      --text-body: #C9C5D4;
      --text-muted: #8A8698;
      --border-subtle: rgba(0, 230, 118, 0.12);
      --border-active: rgba(0, 230, 118, 0.25);
      --radius-card: 16px;
      --radius-btn: 40px;
      --radius-input: 8px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-hover: 0 16px 48px rgba(0,230,118,0.08);
      --nav-glass: rgba(13, 6, 24, 0.55);
      --font-sans: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', system-ui, sans-serif;
      --transition-smooth: 0.3s cubic-bezier(0.23, 1, 0.32, 1);
      --transition-out: 0.25s ease-out;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background: linear-gradient(180deg, #0D0618 0%, #1A0A2E 100%);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    button, .btn {
      font-family: var(--font-sans);
      cursor: pointer;
      border: none;
      background: none;
    }
    input, textarea {
      font-family: var(--font-sans);
    }
    h1, h2, h3 {
      color: var(--text-primary);
    }
    h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
    }
    h2 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.25;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.35;
    }
    .text-muted {
      color: var(--text-muted);
    }
    .section-divider {
      width: 100%;
      height: 1px;
      background: rgba(0,230,118,0.15);
      margin: 0;
    }
    /* 导航 */
    .glass-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: var(--nav-glass);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border-bottom: 1px solid var(--border-subtle);
      box-shadow: 0 4px 24px rgba(0,0,0,0.35);
      transition: background 0.3s, border-color 0.3s;
    }
    .glass-nav.scrolled {
      background: #1A0A2E;
      opacity: 0.96;
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-active);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      height: 68px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.5px;
    }
    .logo-dot {
      width: 6px;
      height: 6px;
      background: var(--primary);
      border-radius: 50%;
      animation: pulse-dot 1.8s infinite;
    }
    @keyframes pulse-dot {
      0% { box-shadow: 0 0 0 0 rgba(0,230,118,0.7); }
      70% { box-shadow: 0 0 0 8px rgba(0,230,118,0); }
      100% { box-shadow: 0 0 0 0 rgba(0,230,118,0); }
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: #C9C5D4;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-cta {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 8px 20px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      transition: all var(--transition-out);
      letter-spacing: 0.04em;
    }
    .nav-cta:hover {
      background: var(--accent);
      border-color: var(--accent);
      color: white;
      box-shadow: 0 0 18px rgba(213,0,249,0.5);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--primary);
      font-size: 28px;
    }
    /* Hero */
    .hero {
      padding: 140px 0 100px;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      background: radial-gradient(circle at 30% 20%, rgba(0,230,118,0.08) 0%, transparent 50%);
    }
    .hero-left {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .hero-sub {
      font-size: 16px;
      color: var(--text-body);
      max-width: 480px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #1A0A2E;
      font-weight: 600;
      font-size: 16px;
      letter-spacing: 0.04em;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: box-shadow var(--transition-out), transform 0.2s;
      box-shadow: 0 0 12px rgba(0,230,118,0.3);
    }
    .btn-primary:hover {
      box-shadow: 0 0 28px var(--primary-glow);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      font-size: 16px;
      letter-spacing: 0.04em;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: all var(--transition-out);
    }
    .btn-outline:hover {
      background: var(--accent);
      border-color: var(--accent);
      color: white;
      box-shadow: 0 0 22px rgba(213,0,249,0.6);
    }
    .hero-right img {
      border-radius: 24px;
      clip-path: polygon(0% 5%, 95% 0%, 100% 95%, 5% 100%);
      box-shadow: 0 20px 40px rgba(0,0,0,0.6);
      transition: transform 0.4s ease;
    }
    .hero-right img:hover {
      transform: scale(1.02);
    }
    /* 板块通用 */
    section {
      padding: 120px 0;
    }
    .section-title {
      margin-bottom: 48px;
    }
    /* 亮点非对称网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.9fr 1.1fr;
      gap: 28px;
    }
    .highlight-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-card);
      padding: 32px;
      border-left: 3px solid var(--primary);
      box-shadow: var(--shadow-card);
      transition: all var(--transition-smooth);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .highlight-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      background: rgba(255,255,255,0.05);
      border-left-width: 5px;
    }
    .icon-placeholder {
      font-size: 28px;
      color: var(--primary);
    }
    /* 案例瀑布流 */
    .cases-masonry {
      columns: 3;
      column-gap: 24px;
    }
    .case-card {
      break-inside: avoid;
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-card);
      overflow: hidden;
      margin-bottom: 24px;
      box-shadow: var(--shadow-card);
      transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      overflow: hidden;
    }
    .case-img img {
      transition: transform 0.4s ease;
      width: 100%;
    }
    .case-card:hover .case-img img {
      transform: scale(1.03);
    }
    .case-content {
      padding: 22px 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .tag {
      background: rgba(0,230,118,0.15);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
    }
    /* 对比表 */
    .comparison-table {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .plan-card {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid transparent;
      transition: all var(--transition-smooth);
    }
    .plan-highlight {
      border-color: var(--primary);
      background: rgba(0,230,118,0.04);
      position: relative;
    }
    .badge-recommend {
      background: var(--accent);
      color: white;
      font-size: 13px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 20px;
      position: absolute;
      top: -14px;
      right: 20px;
    }
    .plan-price {
      font-family: 'Inter', system-ui;
      font-weight: 700;
      font-size: 28px;
      color: var(--primary);
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: 12px;
      overflow: hidden;
      transition: all 0.2s;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      font-weight: 600;
      color: var(--text-primary);
      cursor: pointer;
      gap: 16px;
    }
    .faq-icon {
      font-size: 24px;
      color: var(--primary);
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-in-out;
      padding: 0 24px;
      color: var(--text-body);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    /* 联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      background: radial-gradient(circle at center, rgba(0,230,118,0.05) 0%, transparent 70%);
      padding: 48px;
      border-radius: var(--radius-card);
    }
    .input-field {
      width: 100%;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-input);
      padding: 14px 18px;
      color: white;
      font-size: 16px;
      margin-bottom: 18px;
      transition: border 0.2s, box-shadow 0.2s;
    }
    .input-field:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(0,230,118,0.3);
    }
    .btn-submit {
      background: var(--primary);
      color: #1A0A2E;
      font-weight: 700;
      padding: 14px 24px;
      border-radius: var(--radius-btn);
      width: 100%;
      font-size: 16px;
      transition: box-shadow var(--transition-out);
    }
    .btn-submit:hover {
      box-shadow: 0 0 28px var(--primary-glow);
    }
    footer {
      background: #0D0618;
      padding: 48px 0 32px;
      text-align: center;
    }
    .footer-links {
      display: flex;
      gap: 32px;
      justify-content: center;
      margin: 20px 0;
      flex-wrap: wrap;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    @media (max-width: 1024px) {
      .comparison-table { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
      .hero { grid-template-columns: 1fr; padding: 120px 0 60px; }
      h1 { font-size: 32px; }
      h2 { font-size: 26px; }
      .highlights-grid { grid-template-columns: 1fr; }
      .cases-masonry { columns: 1; }
      .comparison-table { grid-template-columns: 1fr; overflow-x: auto; }
      .contact-grid { grid-template-columns: 1fr; padding: 24px; }
    }