/* roulang page: index */
:root {
      --primary: #E94E2C;
      --primary-hover: #C63D1F;
      --deep-navy: #1A1A2E;
      --amber-gold: #F5A623;
      --bg-warm: #FDF8F5;
      --coral-light: #FFF3EC;
      --white: #FFFFFF;
      --text-primary: #1A1A2E;
      --text-secondary: #5C5C6E;
      --border-light: #F0E8E4;
      --radius-card: 16px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --shadow-card: 0 4px 20px rgba(26,26,46,0.06);
      --shadow-hover: 0 12px 32px rgba(233,78,44,0.12);
      --font-system: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "Poppins", sans-serif;
      --transition: 0.25s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-system);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    /* 导航分屏布局 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-light);
      z-index: 100;
      display: flex;
    }
    .nav-left {
      width: 40%;
      display: flex;
      align-items: center;
      padding-left: 32px;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
      margin-right: 48px;
      white-space: nowrap;
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-primary);
      position: relative;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--primary);
    }
    .nav-right {
      width: 60%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .nav-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(253,248,245,0.5) 0%, rgba(233,78,44,0.15) 100%);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      margin-left: auto;
      margin-right: 20px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--text-primary);
      transition: var(--transition);
    }
    /* Hero */
    .hero {
      display: flex;
      min-height: 100vh;
      padding-top: 72px;
    }
    .hero-left {
      width: 45%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 32px 0 80px;
    }
    .hero-right {
      width: 55%;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(233,78,44,0.08);
    }
    h1 {
      font-size: clamp(40px, 5vw, 56px);
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
      color: var(--text-primary);
    }
    .hero-sub {
      font-size: 20px;
      color: var(--text-secondary);
      margin-bottom: 40px;
      line-height: 1.7;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 38px;
      font-weight: 600;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 18px;
      color: var(--text-secondary);
      max-width: 600px;
    }
    /* 品牌宣言 */
    .values-grid {
      display: flex;
      gap: 60px;
      margin-top: 50px;
      flex-wrap: wrap;
    }
    .value-item {
      flex: 1;
      min-width: 200px;
    }
    .value-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 700;
      color: var(--amber-gold);
      line-height: 1;
      margin-bottom: 12px;
    }
    .value-text {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .value-desc {
      color: var(--text-secondary);
    }
    /* 服务非对称栅格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      margin-top: 48px;
    }
    .services-grid .service-card:nth-child(4),
    .services-grid .service-card:nth-child(5) {
      grid-column: span 1;
    }
    @media (min-width: 1025px) {
      .services-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .services-grid .service-card:nth-child(4) {
        grid-column: 2 / 3;
      }
      .services-grid .service-card:nth-child(5) {
        grid-column: 3 / 4;
      }
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .service-body {
      padding: 28px 32px 32px;
    }
    .service-body h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-body p {
      color: var(--text-secondary);
      margin-bottom: 16px;
    }
    .service-link {
      color: var(--primary);
      font-weight: 600;
    }
    /* 数据背书 */
    .stats-row {
      display: flex;
      justify-content: space-between;
      gap: 30px;
      margin-top: 40px;
      flex-wrap: wrap;
    }
    .stat-item {
      flex: 1;
      min-width: 160px;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 700;
      color: var(--amber-gold);
      border-top: 3px solid var(--primary);
      padding-top: 16px;
      display: inline-block;
    }
    .stat-label {
      font-size: 16px;
      color: var(--text-secondary);
      margin-top: 8px;
    }
    /* 核心优势图文交替 */
    .advantage-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .advantage-img {
      flex: 1;
      height: 320px;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card);
    }
    .advantage-text {
      flex: 1;
    }
    /* CTA 全宽 */
    .cta-block {
      background: var(--primary);
      color: white;
      text-align: center;
      padding: 80px 20px;
      border-radius: 0;
    }
    .cta-block h2 {
      color: white;
      margin-bottom: 16px;
    }
    .cta-block .btn-outline {
      border-color: white;
      color: white;
      margin-top: 24px;
    }
    .cta-block .btn-outline:hover {
      background: white;
      color: var(--primary);
    }
    /* FAQ */
    .faq-layout {
      display: flex;
      gap: 60px;
      margin-top: 40px;
    }
    .faq-left {
      width: 30%;
    }
    .faq-right {
      width: 70%;
    }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }
    .faq-question {
      padding: 24px 32px;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--white);
    }
    .faq-answer {
      padding: 0 32px 24px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    /* 联系表单 */
    .contact-grid {
      display: flex;
      gap: 50px;
      margin-top: 40px;
    }
    .contact-form {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-form input,
    .contact-form textarea {
      padding: 14px 18px;
      border: 1px solid #ddd;
      border-radius: var(--radius-input);
      font-size: 16px;
      background: white;
    }
    .contact-info {
      flex: 1;
      background: var(--coral-light);
      padding: 40px;
      border-radius: var(--radius-card);
    }
    /* 页脚 */
    .footer {
      background: var(--deep-navy);
      color: white;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 40px;
    }
    .footer-links {
      display: flex;
      gap: 40px;
    }
    .footer a {
      color: #ccc;
    }
    .footer a:hover {
      color: white;
    }
    .copyright {
      margin-top: 40px;
      color: #aaa;
      font-size: 14px;
    }
    @media (max-width: 1024px) {
      .nav-left { width: 50%; }
      .nav-right { width: 50%; }
      .hero-left { padding-left: 40px; }
    }
    @media (max-width: 768px) {
      .header { flex-direction: column; height: auto; }
      .nav-left { width: 100%; padding: 16px; justify-content: space-between; }
      .nav-menu { display: none; position: absolute; top: 72px; left: 0; width: 100%; background: white; flex-direction: column; padding: 20px; }
      .nav-menu.active { display: flex; }
      .hamburger { display: flex; }
      .nav-right { display: none; }
      .hero { flex-direction: column; }
      .hero-left, .hero-right { width: 100%; }
      .hero-right { height: 250px; order: -1; }
      .hero-left { padding: 40px 24px; }
      section { padding: 60px 0; }
      .services-grid { grid-template-columns: 1fr; }
      .faq-layout { flex-direction: column; }
      .faq-left, .faq-right { width: 100%; }
      .contact-grid { flex-direction: column; }
      .advantage-row { flex-direction: column; }
      .stats-row { flex-direction: column; }
    }