/* roulang page: index */
:root {
      --deep-black: #1A1A1A;
      --competition-orange: #F15A24;
      --track-gray: #4A4A4A;
      --victory-gold: #D4AF37;
      --light-bg: #FAFAFA;
      --testimonial-bg: #F0F0F0;
      --white: #FFFFFF;
      --text-light: #CCCCCC;
      --border-light: #E0E0E0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 12px;
      --radius-btn: 30px;
      --transition-base: 0.25s ease;
      --font-heading: 'PingFang SC Heavy', 'Microsoft YaHei Bold', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC Regular', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--light-bg);
      color: var(--track-gray);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      margin-top: 0;
      color: var(--deep-black);
      letter-spacing: -0.2px;
    }
    
    a {
      text-decoration: none;
      transition: color var(--transition-base);
      color: var(--competition-orange);
    }
    
    a:hover {
      color: #D94A1A;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 导航栏 */
    .site-header {
      background: var(--white);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      padding: 0 20px;
      border-bottom: 1px solid rgba(0,0,0,0.04);
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    .logo-icon {
      font-size: 28px;
      color: var(--competition-orange);
    }
    
    .logo-text {
      font-family: var(--font-heading);
      font-size: 24px;
      font-weight: 700;
      color: var(--deep-black);
      letter-spacing: 0.5px;
    }
    
    .logo-text span {
      color: var(--competition-orange);
    }
    
    .header-contact {
      display: flex;
      align-items: center;
      gap: 18px;
      font-size: 15px;
      color: var(--track-gray);
    }
    
    .header-contact i {
      color: var(--competition-orange);
      margin-right: 4px;
    }
    
    .channel-row {
      height: 48px;
      display: flex;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
      padding: 0 20px;
    }
    
    .channel-nav {
      display: flex;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
      height: 100%;
      align-items: center;
    }
    
    .channel-nav a {
      color: var(--track-gray);
      font-weight: 500;
      font-size: 15px;
      padding: 12px 0;
      border-bottom: 3px solid transparent;
      transition: all var(--transition-base);
      display: inline-block;
    }
    
    .channel-nav a:hover,
    .channel-nav a.active {
      color: var(--competition-orange);
      border-bottom-color: var(--competition-orange);
    }
    
    .hamburger {
      display: none;
      font-size: 26px;
      background: none;
      border: none;
      color: var(--deep-black);
      cursor: pointer;
    }
    
    /* Hero */
    .hero-section {
      background-color: var(--deep-black);
      background-image: linear-gradient(135deg, #1A1A1A 0%, #2C2C2C 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    
    .hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 20% 30%, rgba(241,90,36,0.25) 0%, transparent 60%);
      z-index: 1;
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }
    
    .hero-text {
      flex: 1 1 500px;
      color: var(--white);
    }
    
    .hero-text h1 {
      color: var(--white);
      font-size: 52px;
      line-height: 1.3;
      margin-bottom: 1.2rem;
      text-shadow: 0 4px 20px rgba(0,0,0,0.4);
      font-weight: 700;
    }
    
    .hero-text h1 span {
      color: var(--competition-orange);
      position: relative;
    }
    
    .hero-subtitle {
      font-size: 20px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 2rem;
      max-width: 550px;
      line-height: 1.7;
    }
    
    .btn-primary {
      background: var(--competition-orange);
      color: var(--white);
      font-weight: 700;
      padding: 14px 38px;
      border-radius: var(--radius-btn);
      font-size: 17px;
      border: none;
      display: inline-block;
      letter-spacing: 0.6px;
      transition: all var(--transition-base);
      box-shadow: 0 6px 18px rgba(241,90,36,0.35);
      text-align: center;
    }
    
    .btn-primary:hover {
      background: #D94A1A;
      transform: scale(1.03);
      color: var(--white);
      box-shadow: 0 10px 24px rgba(241,90,36,0.45);
    }
    
    .btn-ghost {
      background: transparent;
      border: 2px solid var(--competition-orange);
      color: var(--competition-orange);
      font-weight: 700;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      display: inline-block;
      transition: all var(--transition-base);
      letter-spacing: 0.5px;
    }
    
    .btn-ghost:hover {
      background: var(--competition-orange);
      color: var(--white);
    }
    
    .hero-image {
      flex: 1 1 450px;
      position: relative;
      z-index: 2;
    }
    
    .hero-image img {
      border-radius: 20px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      border: 2px solid rgba(255,255,255,0.15);
    }
    
    /* 通用板块 */
    .section {
      padding: 100px 0;
    }
    
    .section-dark {
      background: var(--deep-black);
      color: var(--white);
    }
    
    .section-title {
      font-size: 38px;
      margin-bottom: 16px;
      font-weight: 700;
    }
    
    .section-desc {
      font-size: 18px;
      color: var(--track-gray);
      margin-bottom: 48px;
      max-width: 700px;
    }
    
    /* 痛点区 */
    .pain-grid {
      display: flex;
      flex-direction: column;
      gap: 70px;
    }
    
    .pain-item {
      display: flex;
      align-items: center;
      gap: 50px;
    }
    
    .pain-item.reverse {
      flex-direction: row-reverse;
    }
    
    .pain-img {
      flex: 1 1 45%;
      border-radius: 16px;
      overflow: hidden;
      background: #EAEAEA;
    }
    
    .pain-img img {
      width: 100%;
      height: auto;
      filter: grayscale(30%);
      transition: filter 0.3s;
    }
    
    .pain-text {
      flex: 1 1 50%;
    }
    
    .pain-text h2 {
      font-size: 30px;
    }
    
    .pain-list {
      list-style: none;
      margin-top: 20px;
      padding: 0;
    }
    
    .pain-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
      font-size: 17px;
    }
    
    .pain-list i {
      color: var(--competition-orange);
      font-size: 18px;
    }
    
    /* 解决方案卡片 非对称2列 */
    .solution-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    
    .solution-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 36px 32px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition-base);
      border: 1px solid var(--border-light);
      display: flex;
      flex-direction: column;
    }
    
    .solution-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
      border-color: transparent;
    }
    
    .card-icon {
      font-size: 42px;
      color: var(--competition-orange);
      margin-bottom: 20px;
    }
    
    .solution-card h3 {
      font-size: 24px;
      margin-bottom: 14px;
    }
    
    .solution-card p {
      color: var(--track-gray);
      margin-bottom: 24px;
      flex: 1;
    }
    
    .card-link {
      font-weight: 600;
      color: var(--competition-orange);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 16px;
    }
    
    .card-link i {
      transition: transform 0.2s;
    }
    
    .card-link:hover i {
      transform: translateX(5px);
    }
    
    /* 成果数据 */
    .stats-row {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 30px;
    }
    
    .stat-item h3 {
      font-size: 52px;
      color: var(--competition-orange);
      font-weight: 700;
      margin-bottom: 8px;
    }
    
    .stat-item p {
      color: rgba(255,255,255,0.8);
      font-size: 16px;
    }
    
    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    
    .testimonial-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      border-left: 5px solid var(--competition-orange);
      position: relative;
    }
    
    .quote-icon {
      color: var(--competition-orange);
      font-size: 28px;
      opacity: 0.4;
      margin-bottom: 14px;
    }
    
    .testimonial-text {
      font-style: italic;
      font-size: 17px;
      margin-bottom: 24px;
      color: var(--track-gray);
      line-height: 1.9;
    }
    
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    
    .author-avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: #ddd;
      overflow: hidden;
    }
    
    .author-name {
      font-weight: 700;
      color: var(--deep-black);
    }
    
    .author-role {
      font-size: 14px;
      color: var(--track-gray);
    }
    
    /* FAQ */
    .accordion-faq .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    
    .accordion-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--deep-black);
      padding: 20px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    .accordion-title i {
      color: var(--competition-orange);
      font-size: 18px;
    }
    
    .accordion-content {
      padding-bottom: 22px;
      color: var(--track-gray);
      display: none;
    }
    
    .accordion-item.active .accordion-content {
      display: block;
    }
    
    /* CTA */
    .cta-section {
      background: var(--competition-orange);
      padding: 80px 0;
      text-align: center;
    }
    
    .cta-section h2 {
      color: var(--white);
      font-size: 40px;
    }
    
    .cta-section p {
      color: rgba(255,255,255,0.85);
      font-size: 18px;
      margin-bottom: 30px;
    }
    
    .cta-form {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      margin-top: 28px;
    }
    
    .cta-form input {
      padding: 14px 20px;
      border-radius: 8px;
      border: 1px solid transparent;
      min-width: 240px;
      font-size: 16px;
    }
    
    .btn-dark {
      background: var(--deep-black);
      color: var(--white);
      font-weight: 700;
      padding: 14px 40px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: 0.2s;
    }
    
    .btn-dark:hover {
      background: #2C2C2C;
    }
    
    /* Footer */
    .footer {
      background: var(--track-gray);
      color: var(--text-light);
      padding: 60px 0 20px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    
    .footer-logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 12px;
    }
    
    .footer a {
      color: var(--text-light);
    }
    
    .footer a:hover {
      color: var(--competition-orange);
    }
    
    .copyright {
      background: var(--deep-black);
      padding: 18px 0;
      text-align: center;
      font-size: 14px;
      color: #888;
    }
    
    @media (max-width: 1024px) {
      .testimonial-grid { grid-template-columns: 1fr 1fr; }
      .solution-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    
    @media (max-width: 768px) {
      .channel-row { display: none; }
      .hamburger { display: block; }
      .hero-content { flex-direction: column; }
      .pain-item, .pain-item.reverse { flex-direction: column; }
      .testimonial-grid { grid-template-columns: 1fr; }
      .stats-row { flex-direction: column; }
      .section-title { font-size: 32px; }
    }