/* roulang page: index */
:root {
      --primary-purple: #7C3AED;
      --primary-magenta: #DB2777;
      --deep-indigo: #1E1B4B;
      --neon-cyan: #06D6A0;
      --bg-white: #FAFAFA;
      --card-white: #FFFFFF;
      --text-gray: #4B5563;
      --border-light: #E5E7EB;
      --title-dark: #111827;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
      --shadow-hover: 0 10px 25px rgba(124,58,237,0.15);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --transition: 0.25s ease;
      --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-en: "Inter", "SF Pro Display", system-ui;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-cn);
      color: var(--text-gray);
      background: var(--bg-white);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input {
      font-family: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3 {
      color: var(--title-dark);
      font-weight: 700;
    }
    h1 {
      font-size: 48px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
    }
    h2 {
      font-size: 36px;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 20px;
      line-height: 1.4;
      font-weight: 600;
    }
    .section {
      padding: 80px 0;
    }
    .section-alt {
      background: #FFFFFF;
    }
    .bg-light {
      background: #FAFAFA;
    }
    /* 导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(30, 27, 75, 0.85);
      backdrop-filter: blur(12px);
      height: 72px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      transition: background 0.3s;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-size: 26px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-magenta));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      font-family: var(--font-en);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-size: 16px;
      font-weight: 500;
      transition: color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--neon-cyan);
    }
    .mega-trigger {
      position: relative;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      color: rgba(255,255,255,0.85);
      font-weight: 500;
    }
    .mega-trigger i {
      font-size: 12px;
      transition: transform 0.3s;
    }
    .mega-panel {
      position: absolute;
      top: 60px;
      right: 0;
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: 0 20px 35px rgba(0,0,0,0.2);
      padding: 28px;
      display: flex;
      gap: 32px;
      width: 620px;
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: all 0.25s ease;
      z-index: 100;
    }
    .mega-trigger:hover .mega-panel {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .mega-trigger:hover i {
      transform: rotate(180deg);
    }
    .mega-col {
      flex: 1;
    }
    .mega-col h4 {
      font-size: 14px;
      color: var(--primary-purple);
      margin-bottom: 14px;
      font-weight: 600;
      text-transform: uppercase;
    }
    .mega-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 18px;
      color: var(--title-dark);
    }
    .mega-item i {
      font-size: 20px;
      color: var(--primary-purple);
      margin-top: 2px;
    }
    .mega-item span {
      font-weight: 600;
      display: block;
      font-size: 15px;
    }
    .mega-item small {
      color: var(--text-gray);
      font-size: 13px;
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 26px;
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .main-header { height: 64px; }
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1E1B4B 0%, #7C3AED 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      color: white;
      padding: 60px 0;
    }
    .hero::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      margin-right: auto;
    }
    .hero h1 {
      color: white;
      font-size: 52px;
      animation: fadeInUp 0.8s ease;
    }
    .hero-sub {
      font-size: 20px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
      line-height: 1.6;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-magenta));
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.25s;
      display: inline-block;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(124,58,237,0.4);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: 0.25s;
    }
    .btn-secondary:hover {
      background: rgba(255,255,255,0.15);
    }
    .trust-bar {
      display: flex;
      gap: 40px;
      margin-top: 48px;
      flex-wrap: wrap;
    }
    .trust-item h3 {
      color: var(--neon-cyan);
      font-size: 28px;
      font-family: var(--font-en);
    }
    .trust-item p {
      color: rgba(255,255,255,0.7);
      font-size: 15px;
    }
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }
    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      background: var(--card-white);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: 0.25s;
    }
    .pain-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .pain-icon {
      font-size: 40px;
      margin-bottom: 16px;
      color: var(--primary-purple);
    }
    /* 解决方案错落 */
    .solutions-layout {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 24px;
    }
    .solution-large {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: 0.25s;
    }
    .solution-large:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .solution-large img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .solution-text {
      padding: 28px;
    }
    .solution-small-group {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .solution-small {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: 0.25s;
    }
    .solution-small:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    /* 优势四列 */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }
    .adv-item {
      text-align: center;
      padding: 24px 16px;
    }
    .adv-item i {
      font-size: 36px;
      color: var(--primary-purple);
      margin-bottom: 16px;
    }
    /* 流程 */
    .process-steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
      margin-top: 40px;
    }
    .step {
      text-align: center;
      flex: 1;
      position: relative;
    }
    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--primary-purple);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 12px;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(124,58,237,0.4); }
      70% { box-shadow: 0 0 0 15px rgba(124,58,237,0); }
      100% { box-shadow: 0 0 0 0 rgba(124,58,237,0); }
    }
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .case-card img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 16px;
    }
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: var(--card-white);
      padding: 28px;
      border-radius: var(--radius-card);
      border: 1px solid var(--border-light);
    }
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    details {
      background: var(--card-white);
      margin-bottom: 10px;
      border-radius: var(--radius-card);
      padding: 16px 20px;
      border: 1px solid var(--border-light);
    }
    summary {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .cta-section {
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-magenta));
      padding: 80px 0;
      text-align: center;
      color: white;
    }
    .btn-cta {
      background: var(--neon-cyan);
      color: #111827;
      padding: 18px 48px;
      font-size: 18px;
      font-weight: 700;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: 0.25s;
    }
    .footer {
      background: var(--deep-indigo);
      color: #9CA3AF;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
    }
    @media (max-width: 1024px) {
      .pain-grid, .case-grid, .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
      .adv-grid { grid-template-columns: repeat(2, 1fr); }
      .solutions-layout { grid-template-columns: 1fr; }
      h1 { font-size: 38px; }
    }
    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .pain-grid, .case-grid, .testimonial-grid, .adv-grid, .footer-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 32px; }
      .process-steps { flex-direction: column; gap: 30px; }
    }