/* roulang page: index */
:root {
      --primary-red: #E63946;
      --deep-black: #1A1A1A;
      --data-green: #2A9D8F;
      --bg-light: #F8F9FA;
      --pure-white: #FFFFFF;
      --amber-yellow: #F4A261;
      --text-muted: #4A4A4A;
      --border-light: #e9ecef;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
      --radius-card: 4px;
      --radius-button: 4px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-data: "Inter", "Roboto", sans-serif;
      --transition: all 0.2s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--deep-black);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(26, 26, 26, 0.85);
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }

    .main-header.scrolled {
      background: var(--pure-white);
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }
    .main-header.scrolled .nav-links a,
    .main-header.scrolled .logo-text {
      color: var(--deep-black);
    }
    .main-header.scrolled .hamburger::before,
    .main-header.scrolled .hamburger::after,
    .main-header.scrolled .hamburger span {
      background: var(--deep-black);
    }

    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: white;
    }
    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--primary-red);
      display: inline-block;
      clip-path: polygon(0% 0%, 100% 0%, 80% 50%, 100% 100%, 0% 100%, 20% 50%);
      background: linear-gradient(135deg, var(--primary-red), #f05454);
    }
    .logo-text {
      color: white;
      transition: color 0.2s;
      font-size: 1.6rem;
      letter-spacing: 1px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      color: rgba(255,255,255,0.85);
      transition: var(--transition);
      font-size: 1rem;
    }
    .nav-links a:hover {
      color: var(--primary-red);
    }
    .btn-nav-cta {
      background: var(--primary-red);
      color: white !important;
      padding: 10px 24px;
      border-radius: var(--radius-button);
      font-weight: 600;
      transition: background 0.2s;
    }
    .btn-nav-cta:hover {
      background: #C1121F;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
    }
    .hamburger span, .hamburger::before, .hamburger::after {
      display: block;
      width: 24px;
      height: 2px;
      background: white;
      transition: var(--transition);
    }

    /* Hero */
    .hero {
      position: relative;
      background-color: var(--deep-black);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      color: white;
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      min-height: 90vh;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(10, 10, 10, 0.7);
      backdrop-filter: blur(1px);
    }
    .hero-content {
      position: relative;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 60px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: #ddd;
      margin-bottom: 32px;
    }
    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(244,162,97,0.2);
      border-left: 4px solid var(--amber-yellow);
      padding: 8px 20px;
      margin-bottom: 30px;
      border-radius: 2px;
      font-weight: 500;
    }
    .pulse {
      width: 10px; height:10px;
      background: var(--amber-yellow);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 10px var(--amber-yellow);
      animation: pulseAnim 1.4s infinite;
    }
    @keyframes pulseAnim { 0%,100%{ opacity:0.6;} 50%{opacity:1;} }
    .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn { padding: 14px 36px; border-radius: var(--radius-button); font-weight: 600; display: inline-block; transition: var(--transition); cursor:pointer; border:none; font-size:1rem; }
    .btn-primary { background: var(--primary-red); color:white; }
    .btn-primary:hover { background:#C1121F; }
    .btn-outline { border:2px solid var(--data-green); color:white; }
    .btn-outline:hover { background:var(--data-green); color:white; }

    .hero-visual {
      background: rgba(26,26,26,0.5);
      border-radius: 12px;
      padding: 20px;
      backdrop-filter: blur(4px);
    }
    .dashboard-mock { display: flex; flex-direction: column; gap: 20px; }
    .score-strip {
      display: flex; justify-content: space-between; align-items: center;
      background: #2a2a2a; padding: 12px 16px; border-radius: 6px;
    }
    .team { font-weight: 600; color: #ccc; }
    .score { font-family: var(--font-data); font-size: 1.6rem; font-weight: 700; color:white; }
    .status-running { color: var(--amber-yellow); font-size:0.8rem; font-weight:500;}

    /* 板块通用 */
    section { padding: 90px 0; }
    .section-label { color: var(--primary-red); font-weight: 600; letter-spacing: 1px; margin-bottom: 8px; }
    .section-title { font-size: 2.4rem; font-weight: 700; margin: 0 0 16px 0; }
    .section-para { color: var(--text-muted); max-width: 700px; font-size:1.1rem; margin-bottom: 30px; }

    /* 核心优势 */
    .grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
    .advantage-card {
      background: var(--pure-white); padding: 32px; border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm); transition: var(--transition);
    }
    .advantage-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
    .adv-icon { font-size: 2.2rem; color: var(--primary-red); margin-bottom: 20px; }

    /* 功能流程 */
    .feature-row { display: flex; align-items: center; gap: 52px; margin: 60px 0; }
    .feature-row.reverse { flex-direction: row-reverse; }
    .feature-img { flex:1; border-radius: var(--radius-card); overflow: hidden; background:#eee; min-height: 280px; }
    .feature-img img { width:100%; height:100%; object-fit: cover; }
    .feature-text { flex:1; }
    .tag { display: inline-block; background: #eaf7f5; color: var(--data-green); padding: 4px 12px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 12px; }

    /* 场景卡片 */
    .scene-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 30px; }
    .scene-card { background: white; padding: 28px; border-left: 5px solid var(--primary-red); border-radius: 4px; box-shadow: var(--shadow-sm); transition: var(--transition); }
    .scene-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

    /* 案例/数据 */
    .stats-flex { display: flex; gap: 40px; flex-wrap: wrap; justify-content: center; }
    .stat { font-family: var(--font-data); font-size: 3rem; font-weight: 700; color: var(--data-green); }

    /* FAQ */
    .faq-list { max-width: 800px; margin:0 auto; }
    details { background: white; margin-bottom: 12px; border-radius: 4px; box-shadow: 0 2px 6px rgba(0,0,0,0.02); }
    details[open] { box-shadow: var(--shadow-sm); }
    summary { padding: 20px 24px; font-weight: 600; list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; border-left: 4px solid transparent; }
    details[open] summary { border-left: 4px solid var(--primary-red); }
    .faq-answer { padding: 0 24px 24px; color: var(--text-muted); }

    /* CTA */
    .cta-banner {
      background: linear-gradient(135deg, #2A2A2A 0%, #1e1e1e 100%);
      background-image: url('/assets/images/backpic/back-2.webp'); background-size: cover; background-position: center;
      position: relative; text-align: center; padding: 70px 0; border-radius: 12px; margin: 0 24px;
      color: white;
    }
    .cta-banner::before { content:""; position:absolute; inset:0; background:rgba(20,20,20,0.7); border-radius:12px; }
    .cta-banner > div { position: relative; }

    /* 页脚 */
    .footer { background: var(--deep-black); color: #aaa; padding: 60px 0 24px; }
    .footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr 1fr; gap: 40px; }
    .footer h4 { color: var(--data-green); font-weight: 600; margin-bottom: 20px; }
    .footer a { display:block; margin-bottom:10px; color:#ccc; }
    .copyright { border-top:1px solid #333; margin-top:40px; padding-top:20px; text-align:center; }

    @media (max-width:1024px) {
      .hero-content { grid-template-columns: 1fr; }
      .feature-row { flex-direction: column; }
      .feature-row.reverse { flex-direction: column; }
    }
    @media (max-width:768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .mobile-menu.active { display: flex; flex-direction: column; position: absolute; top:72px; left:0; width:100%; background: white; padding:20px; gap:20px; box-shadow:0 10px 15px rgba(0,0,0,0.05); }
      .mobile-menu a { color:var(--deep-black); }
      .hero { padding:120px 0 70px; }
      .grid-3, .scene-grid { grid-template-columns:1fr; }
    }
    @media (max-width:520px) {
      .section-title { font-size: 1.9rem; }
    }