/* roulang page: index */
:root {
      --primary-purple: #C026D3;
      --primary-orange: #F54900;
      --accent-cyan: #00F0A8;
      --accent-gold: #FFB800;
      --bg-black: #0F0F0F;
      --bg-deep-purple: #1A0A1E;
      --text-white: #F5F5F7;
      --text-gray: #B0B0B8;
      --card-bg: rgba(255, 255, 255, 0.04);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --radius-card: 16px;
      --radius-btn: 8px;
      --shadow-glow: 0 8px 32px rgba(192, 38, 211, 0.25);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-black);
      color: var(--text-white);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
    }

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

    /* 导航杂志风格 */
    .site-header {
      background: rgba(15, 15, 15, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      position: sticky;
      top: 0;
      z-index: 50;
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 24px;
      color: var(--text-white);
    }

    .logo-icon {
      font-size: 28px;
      filter: drop-shadow(0 0 8px var(--primary-purple));
    }

    .brand-contact {
      color: var(--text-gray);
      font-size: 14px;
    }

    .channel-nav {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 24px;
      overflow-x: auto;
      white-space: nowrap;
      background: rgba(26, 10, 30, 0.6);
      border-top: 1px solid rgba(255,255,255,0.05);
    }

    .channel-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-gray);
      padding: 8px 16px;
      border-radius: 20px;
      transition: all 0.2s;
      letter-spacing: 0.3px;
    }

    .channel-nav a:hover,
    .channel-nav a.active {
      color: var(--primary-orange);
      background: rgba(245, 73, 0, 0.1);
      text-shadow: 0 0 6px rgba(245, 73, 0, 0.5);
    }

    .hamburger {
      display: none;
      font-size: 24px;
      color: white;
    }

    /* Hero */
    .hero {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: 100px 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      min-height: 70vh;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(192,38,211,0.25) 0%, rgba(15,15,15,0.8) 90%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
    }

    .hero h1 {
      font-size: clamp(48px, 8vw, 80px);
      font-weight: 900;
      background: linear-gradient(to right, #F54900, #C026D3);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 24px;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }

    .hero-sub {
      font-size: clamp(18px, 2.5vw, 24px);
      color: var(--text-gray);
      margin-bottom: 40px;
    }

    .btn-primary {
      background: linear-gradient(135deg, #C026D3, #F54900);
      padding: 16px 48px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 18px;
      color: white;
      transition: all 0.3s;
      display: inline-block;
      box-shadow: 0 4px 20px rgba(192,38,211,0.4);
    }

    .btn-primary:hover {
      filter: brightness(1.15);
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(245,73,0,0.5);
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }

    .section-title {
      font-size: clamp(28px, 5vw, 42px);
      font-weight: 700;
      margin-bottom: 48px;
      text-align: center;
      color: white;
      text-shadow: 0 0 12px rgba(192,38,211,0.5);
    }

    .grid-3, .grid-4 {
      display: grid;
      gap: 24px;
    }

    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }

    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: all 0.25s ease;
    }

    .card:hover {
      border-color: var(--primary-purple);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    .pain-card {
      border-left: 4px solid var(--primary-purple);
    }

    .icon-accent {
      color: var(--accent-cyan);
      font-size: 32px;
      margin-bottom: 16px;
    }

    .stat-number {
      font-size: clamp(40px, 7vw, 64px);
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1.1;
    }

    .stat-label {
      color: var(--text-gray);
      font-size: 16px;
    }

    .testimonial-card {
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-card);
      padding: 28px;
      position: relative;
    }

    .avatar-placeholder {
      width: 56px;
      height: 56px;
      background: linear-gradient(145deg, #C026D3, #F54900);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 24px;
      margin-bottom: 16px;
    }

    .badge-gold {
      background: var(--accent-gold);
      color: #000;
      font-weight: 700;
      padding: 2px 12px;
      border-radius: 20px;
      font-size: 13px;
      display: inline-block;
    }

    .faq-item {
      background: rgba(255,255,255,0.03);
      border-radius: 12px;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: color 0.2s;
    }

    .faq-question:hover {
      color: var(--primary-purple);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      background: rgba(0,0,0,0.3);
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px;
    }

    .cta-banner {
      background: linear-gradient(135deg, #1A0A1E 0%, #0F0F0F 100%);
      border-top: 2px solid var(--primary-purple);
      border-bottom: 2px solid var(--primary-orange);
      text-align: center;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer-links a {
      display: block;
      color: var(--text-gray);
      margin-bottom: 8px;
      transition: color 0.2s;
    }

    .footer-links a:hover { color: var(--accent-cyan); }

    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .channel-nav { display: none; }
      .hamburger { display: block; }
      .hero { padding: 60px 16px; }
      .footer-grid { grid-template-columns: 1fr; }
    }