/* roulang page: index */
:root {
      --orange: #F04E23;
      --dark: #1A1A2E;
      --warm-white: #F7F5F0;
      --cyan: #00D2A0;
      --gray-line: #E0DCD5;
      --shadow-sm: 0 8px 24px rgba(26,26,46,0.08);
      --shadow-hover: 0 18px 32px rgba(26,26,46,0.13);
      --radius-card: 16px;
      --radius-btn: 8px;
      --font-title: "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-number: "DIN Alternate", "Helvetica Neue", "Impact", sans-serif;
      letter-spacing: -0.2px;
      background-color: var(--warm-white);
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--warm-white);
      color: #1A1A2E;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(26, 26, 46, 0.8);
      backdrop-filter: blur(14px);
      z-index: 99;
      transition: background 0.3s, box-shadow 0.3s;
      border-bottom: 1px solid transparent;
    }

    .navbar.scrolled {
      background: rgba(26, 26, 46, 0.97);
      border-bottom: 1px solid var(--orange);
      box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      color: white;
    }

    .logo svg {
      width: 32px;
      height: 32px;
      fill: none;
      stroke: var(--orange);
      stroke-width: 2.5;
    }

    .logo-text {
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 24px;
      color: var(--orange);
      letter-spacing: 1px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }

    .nav-links a {
      color: #F7F5F0;
      text-decoration: none;
      font-weight: 500;
      font-size: 16px;
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--orange);
      border-bottom-color: var(--orange);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      color: white;
      cursor: pointer;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--dark);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 32px;
      z-index: 100;
      list-style: none;
    }

    .mobile-menu a {
      font-size: 24px;
      color: white;
      text-decoration: none;
      font-weight: 600;
      transition: color 0.2s;
    }

    .mobile-menu a:hover {
      color: var(--orange);
    }

    .close-menu {
      position: absolute;
      top: 26px;
      right: 28px;
      background: none;
      border: none;
      font-size: 36px;
      color: white;
      cursor: pointer;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: radial-gradient(circle at 30% 40%, rgba(240,78,35,0.28) 0%, #1A1A2E 75%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      display: flex;
      align-items: center;
      padding-top: 80px;
      position: relative;
    }

    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      width: 100%;
      flex-wrap: wrap;
    }

    .hero-text {
      flex: 1 1 55%;
      color: white;
      max-width: 580px;
    }

    .hero-text h1 {
      font-family: var(--font-title);
      font-size: clamp(40px, 7vw, 64px);
      font-weight: 800;
      line-height: 1.1;
      background: linear-gradient(180deg, #F04E23 10%, #FFFFFF 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 18px;
      letter-spacing: -1px;
    }

    .hero-text p {
      font-size: 18px;
      color: #F7F5F0;
      max-width: 460px;
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--orange);
      color: white;
      border: none;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      transition: background 0.25s, transform 0.2s;
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      background: var(--cyan);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--warm-white);
      color: var(--warm-white);
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.25s;
      text-decoration: none;
    }

    .btn-outline:hover {
      background: white;
      color: #1A1A2E;
      border-color: white;
      transform: translateY(-2px);
    }

    .hero-stats {
      flex: 1 1 35%;
      background: rgba(26, 26, 46, 0.6);
      backdrop-filter: blur(14px);
      border-radius: 24px;
      padding: 28px 24px;
      display: flex;
      flex-direction: column;
      gap: 22px;
      border: 1px solid rgba(255,255,255,0.15);
    }

    .stat-row {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      color: white;
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 38px;
      font-weight: 700;
      color: var(--cyan);
    }

    .stat-label {
      font-size: 15px;
      color: #ccc;
    }

    /* 指标看板 */
    .metrics {
      background: #F7F5F0;
      padding: 100px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-item {
      border-right: 1px solid var(--gray-line);
      padding: 20px;
    }
    .metric-item:last-child {
      border-right: none;
    }

    .metric-number {
      font-family: var(--font-number);
      font-size: clamp(48px, 6vw, 68px);
      font-weight: 700;
      color: var(--orange);
    }

    .metric-desc {
      font-size: 16px;
      color: #1A1A2E;
      font-weight: 500;
    }

    /* 服务矩阵 */
    .services {
      padding: 100px 0;
    }

    .section-title {
      font-family: var(--font-title);
      font-size: 40px;
      font-weight: 800;
      margin-bottom: 56px;
      color: #1A1A2E;
    }

    .service-grid {
      display: flex;
      gap: 28px;
      align-items: stretch;
    }

    .service-main {
      flex: 0 0 38%;
      background: linear-gradient(145deg, #F04E23, #C93A18);
      border-radius: 20px;
      padding: 44px 32px;
      color: white;
      display: flex;
      flex-direction: column;
      justify-content: center;
      background-image: url('/assets/images/coverpic/service-main.jpg');
      background-size: cover;
      background-blend-mode: overlay;
      min-height: 360px;
    }

    .service-main h3 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .service-sub {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .service-card {
      background: white;
      border: 1px solid #E0DCD5;
      border-radius: 16px;
      padding: 24px 28px;
      display: flex;
      align-items: center;
      gap: 18px;
      transition: all 0.25s;
    }

    .service-card:hover {
      border-color: var(--orange);
      transform: translateX(6px);
      box-shadow: var(--shadow-hover);
    }

    .service-icon {
      font-size: 36px;
    }

    /* 对比区 */
    .compare {
      background: #F7F5F0;
      padding: 100px 0;
    }

    .compare-wrapper {
      display: flex;
      gap: 24px;
      align-items: center;
    }

    .compare-box {
      flex: 1;
      background: white;
      padding: 36px;
      border-radius: 20px;
    }

    .compare-box.old {
      background: #eae7e2;
      color: #4a4a5a;
    }

    .compare-box.new {
      background: white;
      border: 2px solid var(--orange);
    }

    .compare-box h3 {
      font-size: 26px;
      margin-bottom: 18px;
    }

    .vs-divider {
      font-weight: 800;
      font-size: 28px;
      color: var(--orange);
    }

    .list-item {
      display: flex;
      align-items: center;
      gap: 10px;
      margin: 12px 0;
    }

    /* FAQ */
    .faq {
      background: #1A1A2E;
      padding: 100px 0;
      color: white;
    }

    .faq h2 {
      color: #F7F5F0;
      font-size: 40px;
      margin-bottom: 50px;
    }

    .faq-group {
      margin-bottom: 44px;
    }

    .faq-group-label {
      color: var(--orange);
      font-weight: 700;
      font-size: 16px;
      letter-spacing: 2px;
      margin-bottom: 20px;
    }

    .faq-item {
      border: 1px solid #3a3a4a;
      border-radius: 14px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: 0.2s;
      background: #1A1A2E;
    }

    .faq-question {
      width: 100%;
      background: transparent;
      color: white;
      padding: 22px 24px;
      font-size: 18px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      border: none;
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 24px 22px;
      color: #ddd;
      display: none;
      border-left: 4px solid var(--orange);
      margin-left: 12px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(102deg, #F04E23 30%, #1A1A2E 90%);
      padding: 90px 0;
    }

    .cta-grid {
      display: flex;
      gap: 40px;
      align-items: center;
    }

    .cta-text {
      flex: 1;
      color: white;
    }

    .cta-form {
      flex: 1;
      background: white;
      border-radius: 20px;
      padding: 36px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .cta-form input {
      padding: 14px;
      border: 1px solid #ddd;
      border-radius: 10px;
      font-size: 16px;
    }

    .footer {
      background: #1A1A2E;
      color: #ccc;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .metrics-grid { grid-template-columns: repeat(2,1fr); }
      .service-grid { flex-direction: column; }
      .compare-wrapper { flex-direction: column; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .hero-content { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }