/* roulang page: index */
:root {
      --electric-purple: #B44CF0;
      --cyan-blue: #00E5FF;
      --blaze-orange: #FF5E13;
      --deep-space: #0D0F14;
      --card-white: #FFFFFF;
      --text-light: #B0B8C5;
      --text-dark: #1A1D24;
      --text-muted: #5A6270;
      --border-light: rgba(255,255,255,0.1);
      --shadow-card: 0 10px 30px rgba(0,0,0,0.08);
      --shadow-hover: 0 20px 40px rgba(0,0,0,0.15);
      --shadow-glow: 0 8px 24px rgba(180, 76, 240, 0.25);
      --radius-card: 20px;
      --radius-btn: 32px;
      --radius-badge: 28px;
      --transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", "SF Pro Display", sans-serif;
      background-color: var(--deep-space);
      color: var(--text-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, .stats-number {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 导航资讯门户吸顶 */
    .portal-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(13, 15, 20, 0.78);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.1);
      transition: var(--transition);
    }
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 28px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.8rem;
      font-weight: 800;
      color: white;
      letter-spacing: -0.5px;
    }
    .logo-icon {
      font-size: 2.2rem;
      background: linear-gradient(135deg, var(--electric-purple), var(--cyan-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .logo-text {
      background: linear-gradient(to right, #fff, #e0e7ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .channel-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 28px 12px;
      flex-wrap: wrap;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      color: #ddd;
      font-weight: 600;
      font-size: 1rem;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover, .nav-links a.active {
      color: white;
      border-bottom-color: var(--cyan-blue);
    }
    .hot-tags {
      display: flex;
      gap: 12px;
      align-items: center;
      margin-left: 20px;
    }
    .tag-pill {
      background: transparent;
      border: 1px solid var(--cyan-blue);
      color: var(--cyan-blue);
      padding: 4px 18px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      transition: var(--transition);
    }
    .tag-pill:hover {
      background: var(--cyan-blue);
      color: #000;
    }
    .search-icon {
      color: white;
      font-size: 1.2rem;
      margin-left: 18px;
      cursor: pointer;
      opacity: 0.8;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* 区块通用 */
    .section {
      padding: 100px 0;
      position: relative;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 28px;
    }

    /* Hero */
    #hero {
      min-height: 95vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      color: white;
    }
    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(180,76,240,0.78) 0%, rgba(0,229,255,0.55) 100%);
      mix-blend-mode: overlay;
      backdrop-filter: blur(2px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 750px;
    }
    .hero h1 {
      font-size: 3.9rem;
      font-weight: 800;
      line-height: 1.15;
      text-shadow: 0 8px 24px rgba(0,0,0,0.5);
    }
    .highlight-purple { color: var(--electric-purple); }
    .highlight-orange { color: var(--blaze-orange); }
    .hero h2 {
      font-size: 1.5rem;
      font-weight: 500;
      margin: 24px 0 36px;
      color: rgba(255,255,255,0.9);
      letter-spacing: 0.3px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--blaze-orange);
      color: white;
      padding: 16px 42px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      box-shadow: 0 10px 28px rgba(255,94,19,0.5);
      border: none;
      transition: var(--transition);
    }
    .btn-primary:hover {
      background: #ff7b38;
      box-shadow: 0 0 28px rgba(255,94,19,0.9);
      transform: translateY(-3px);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--electric-purple);
      color: white;
      padding: 16px 42px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }
    .btn-outline:hover {
      background: var(--electric-purple);
      color: white;
    }

    /* 痛点卡片 */
    .challenge-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
      margin-top: 48px;
    }
    .pain-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 36px 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      border: 1px solid rgba(0,0,0,0.02);
    }
    .pain-card:hover {
      transform: translateY(-10px);
      box-shadow: var(--shadow-hover);
    }
    .pain-icon {
      font-size: 2.4rem;
      color: var(--blaze-orange);
      margin-bottom: 20px;
    }
    .solution-arrow {
      color: var(--electric-purple);
      font-weight: 700;
      margin-top: 18px;
      display: inline-block;
    }

    /* 数据徽章 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 32px;
      margin-top: 48px;
    }
    .stat-badge {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(10px);
      border-radius: 28px;
      padding: 40px 24px;
      text-align: center;
      border: 1px solid rgba(255,255,255,0.15);
      box-shadow: 0 8px 24px rgba(180,76,240,0.15);
      transition: var(--transition);
    }
    .stat-badge:hover {
      border-color: var(--cyan-blue);
      box-shadow: 0 0 36px rgba(0,229,255,0.3);
    }
    .stat-number {
      font-size: 3.8rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--electric-purple), var(--cyan-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 证言 */
    .testimonial-block {
      display: flex;
      gap: 40px;
      align-items: center;
    }
    .testimonial-img {
      flex: 1;
      border-radius: 36px;
      overflow: hidden;
    }
    .testimonial-cards {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .quote-card {
      background: rgba(255,255,255,0.78);
      backdrop-filter: blur(12px);
      border-radius: 24px;
      padding: 32px;
      border: 1px solid rgba(255,255,255,0.6);
      box-shadow: var(--shadow-card);
    }

    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: 18px;
      margin-bottom: 18px;
      box-shadow: 0 5px 18px rgba(0,0,0,0.03);
      overflow: hidden;
    }
    .accordion-title {
      font-weight: 700;
      padding: 22px 32px;
      display: flex;
      align-items: center;
      gap: 18px;
      cursor: pointer;
    }
    .faq-q {
      color: var(--electric-purple);
      font-size: 1.8rem;
    }

    /* 页脚 */
    .footer {
      background: #0b0d12;
      color: #b0b8c5;
      padding: 60px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 38px;
    }

    @media (max-width: 1024px) {
      .challenge-grid, .stats-grid { grid-template-columns: 1fr 1fr; }
      .testimonial-block { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .channel-row .nav-links, .hot-tags { display: none; }
      .mobile-toggle { display: block; }
      .hero h1 { font-size: 2.5rem; }
      .challenge-grid, .stats-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }