/* roulang page: index */
:root {
      --sports-red: #E60012;
      --deep-black: #1A1A1A;
      --warm-white: #F7F5F0;
      --champion-gold: #C9A84C;
      --pure-white: #FFFFFF;
      --body-gray: #333333;
      --subtle-border: rgba(0,0,0,0.06);
      --radius-card: 10px;
      --radius-button: 30px;
      --shadow-card: 0 10px 30px rgba(0,0,0,0.04);
      --shadow-hover: 0 18px 36px rgba(0,0,0,0.09);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      background-color: var(--warm-white);
      color: var(--body-gray);
      line-height: 1.6;
      font-weight: 400;
      scroll-behavior: smooth;
    }
    a { text-decoration: none; color: inherit; }
    img { display: block; max-width: 100%; height: auto; }
    .container {
      max-width: 1260px;
      margin: 0 auto;
      padding: 0 30px;
    }
    /* 导航区 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      z-index: 100;
      border-bottom: 1px solid var(--subtle-border);
      transition: box-shadow 0.2s;
    }
    .nav-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 75px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 28px;
      font-weight: 800;
      color: var(--sports-red);
      letter-spacing: -1px;
    }
    .logo-area span {
      background: linear-gradient(135deg, #C90010 0%, #E60012 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links { display: flex; gap: 32px; align-items: center; }
    .nav-links a {
      font-weight: 600;
      font-size: 16px;
      color: var(--deep-black);
      transition: color 0.25s;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--sports-red);
    }
    .nav-cta {
      background: var(--sports-red);
      color: white !important;
      padding: 12px 26px;
      border-radius: 30px;
      transition: background 0.25s ease-in-out;
      box-shadow: 0 4px 10px rgba(230,0,18,0.25);
    }
    .nav-cta:hover {
      background: #C50010;
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
    }
    .menu-toggle span {
      width: 30px;
      height: 3px;
      background: var(--deep-black);
      border-radius: 6px;
    }
    /* 英雄区 */
    #hero {
      position: relative;
      overflow: hidden;
      background: var(--pure-white);
      min-height: 100vh;
      display: flex;
      align-items: center;
      margin-top: 60px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1.05;
      z-index: 5;
    }
    .hero-text h1 {
      font-size: 64px;
      font-weight: 800;
      line-height: 1.1;
      color: var(--deep-black);
      letter-spacing: -0.02em;
      margin-bottom: 24px;
    }
    .hero-sub {
      font-size: 20px;
      color: #4A4A4A;
      line-height: 1.7;
      margin-bottom: 38px;
    }
    .hero-buttons { display: flex; gap: 22px; flex-wrap: wrap; }
    .btn-primary {
      background: var(--sports-red);
      color: white;
      padding: 16px 38px;
      border-radius: 50px;
      font-weight: 700;
      letter-spacing: 0.4px;
      transition: all 0.25s;
      border: 2px solid var(--sports-red);
      display: inline-block;
    }
    .btn-primary:hover { background: #B8000F; border-color: #B8000F; }
    .btn-outline {
      background: transparent;
      color: var(--deep-black);
      border: 2px solid var(--deep-black);
      padding: 16px 38px;
      border-radius: 50px;
      font-weight: 600;
      transition: all 0.25s;
    }
    .btn-outline:hover { background: var(--deep-black); color: white; }
    .hero-visual {
      flex: 0.95;
      border-radius: 34px;
      overflow: hidden;
      box-shadow: 0 25px 50px -12px rgba(0,0,0,0.15);
    }
    /* 板区块 */
    section { padding: 110px 0; }
    .section-title {
      text-align: center;
      margin-bottom: 90px;
    }
    .section-title h2 {
      font-size: 42px;
      font-weight: 700;
      color: var(--deep-black);
      position: relative;
      display: inline-block;
    }
    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -16px;
      left: 50%;
      transform: translateX(-50%);
      width: 55px;
      height: 4px;
      background: var(--champion-gold);
    }
    .pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 35px; }
    .pain-card {
      background: white;
      padding: 42px 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.35s ease;
    }
    .pain-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-hover); }
    .icon-dot { font-size: 30px; margin-bottom: 25px; color: var(--sports-red); }
    .pain-card h3 { font-size: 26px; font-weight: 600; margin-bottom: 20px; color: var(--deep-black); }
    .solution-stack { display: flex; flex-direction: column; gap: 75px; }
    .solution-row { display: flex; align-items: center; gap: 70px; }
    .solution-row.reverse { flex-direction: row-reverse; }
    .solution-text { flex: 1; }
    .solution-text h3 { font-size: 32px; margin-bottom: 18px; font-weight: 700; color: var(--deep-black); }
    .solution-img { flex: 0.9; border-radius: 26px; overflow: hidden; }
    .results-box { background: var(--deep-black); border-radius: 48px; padding: 80px 40px; display: flex; justify-content: space-around; flex-wrap: wrap; gap: 40px; }
    .stat-item { text-align: center; }
    .stat-number { font-size: 56px; font-weight: 800; color: var(--champion-gold); display: block; }
    .stat-label { color: rgba(255,255,255,0.9); font-size: 18px; }
    .testimonial-grid { display: flex; gap: 35px; align-items: flex-start; flex-wrap: wrap; }
    .testimonial-card {
      background: white;
      border-radius: 18px;
      padding: 40px;
      flex:1;
      min-width: 250px;
      box-shadow: var(--shadow-card);
      transition: transform .3s;
    }
    .testimonial-card.featured { transform: scale(1.03); background: var(--warm-white); }
    .testimonial-card p { font-size: 17px; margin: 18px 0; }
    .user-info img { width: 48px; height: 48px; border-radius: 50%; margin-right: 12px; }
    .faq-wrapper { max-width: 780px; margin:0 auto; }
    details { background: white; border-radius: 14px; padding: 20px 28px; margin-bottom: 18px; box-shadow: 0 5px 15px rgba(0,0,0,0.02); }
    summary { font-weight: 700; font-size: 18px; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
    .cta-red { background: var(--sports-red); text-align: center; color: white; padding: 90px 0; }
    .cta-red h2 { color: white; font-size: 44px; }
    .btn-ghost-white { border: 2px solid white; color: white; padding: 16px 40px; border-radius: 50px; font-weight: 700;background:transparent; transition: .3s; }
    .btn-ghost-white:hover { background: white; color: var(--sports-red); }
    footer { background: #111; color: #ddd; padding: 80px 0 30px; }
    .footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 35px; }
    @media (max-width: 1024px) {
      .hero-grid { flex-direction: column; }
      .hero-text h1 { font-size: 46px; }
      .solution-row, .solution-row.reverse { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .menu-toggle { display: flex; }
      .nav-links { position: fixed; top:0;right:-100%; width:75%; height:100vh; background: #E60012; flex-direction: column; justify-content: center; gap:40px; transition:0.35s; }
      .nav-links.open { right:0; }
      .pain-grid, .testimonial-grid { grid-template-columns: 1fr; flex-direction:column; }
      h1 { font-size: 42px!important; }
      section { padding:75px 0; }
    }