/* roulang page: index */
:root {
      --primary: #E8451E;
      --primary-dark: #c43816;
      --secondary: #1A1A2E;
      --warm-bg: #F5F0E8;
      --accent: #FFB800;
      --success: #0F9B6F;
      --white: #FFFFFF;
      --gray-light: #EAE6DF;
      --gray-mid: #B0A99F;
      --text-dark: #2C2C2C;
      --text-soft: #5A554F;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-chip: 24px;
      --shadow-card: 0 2px 12px rgba(26, 26, 46, 0.06);
      --shadow-hover: 0 8px 24px rgba(26, 26, 46, 0.12);
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-number: 'DIN Alternate', 'Bebas Neue', var(--font-title);
      --transition-default: 0.2s ease;
      --max-width: 1280px;
      --section-gap: 100px;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--warm-bg);
      color: var(--text-dark);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input, textarea {
      font-family: inherit;
      font-size: inherit;
      outline: none;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 40px;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(245, 240, 232, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      height: 72px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(26, 26, 46, 0.05);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 24px;
      letter-spacing: -0.02em;
      color: var(--secondary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo span {
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      gap: 8px;
      align-items: center;
    }

    .nav-chip {
      background: var(--gray-light);
      border-radius: 20px;
      padding: 8px 18px;
      font-weight: 500;
      font-size: 15px;
      color: var(--text-soft);
      transition: background var(--transition-default), color var(--transition-default);
    }
    .nav-chip:hover {
      background: rgba(232, 69, 30, 0.1);
      color: var(--primary);
    }

    .btn-primary {
      background: var(--primary);
      color: var(--white);
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: background var(--transition-default), transform var(--transition-default);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: scale(1.03);
    }
    .btn-primary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition-default);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
      transform: scale(1.03);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--secondary);
      border-radius: 2px;
      transition: var(--transition-default);
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1A1A2E 0%, #2d1a1a 60%, #E8451E 100%);
      position: relative;
      overflow: hidden;
      padding: 80px 0 100px;
      color: white;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.2;
      mix-blend-mode: overlay;
    }
    .hero .container {
      position: relative;
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }
    .hero-left {
      flex: 1 1 500px;
    }
    .hero h1 {
      font-size: clamp(40px, 6vw, 56px);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 20px;
      color: white;
    }
    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
      max-width: 580px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-right {
      flex: 1 1 350px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .metric-board {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-around;
      gap: 20px;
    }
    .metric-item {
      text-align: center;
    }
    .metric-number {
      font-family: var(--font-number);
      font-size: 44px;
      color: var(--accent);
      font-weight: 700;
      line-height: 1.1;
    }
    .metric-label {
      font-size: 14px;
      color: rgba(255,255,255,0.7);
    }

    /* 通用板块 */
    .section {
      padding: var(--section-gap) 0;
    }
    .section-title {
      font-size: 38px;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 48px;
      color: var(--secondary);
    }

    /* 核心优势 侧边栏卡片 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      display: flex;
      gap: 20px;
      transition: box-shadow var(--transition-default), transform var(--transition-default);
    }
    .adv-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .adv-icon {
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: rgba(232, 69, 30, 0.08);
      color: var(--primary);
      font-size: 24px;
      flex-shrink: 0;
    }
    .adv-content h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    /* 服务矩阵 分段标签 */
    .service-matrix {
      display: flex;
      gap: 40px;
      align-items: flex-start;
    }
    .service-tabs {
      display: flex;
      flex-direction: column;
      gap: 12px;
      min-width: 180px;
    }
    .service-chip {
      background: var(--gray-light);
      border: none;
      border-radius: var(--radius-chip);
      padding: 14px 22px;
      text-align: left;
      font-weight: 500;
      cursor: pointer;
      transition: all var(--transition-default);
      color: var(--text-dark);
    }
    .service-chip.active {
      background: var(--primary);
      color: white;
    }
    .service-content {
      flex: 1;
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 36px;
      box-shadow: var(--shadow-card);
      display: flex;
      gap: 32px;
      align-items: center;
      animation: fadeIn 0.3s ease;
    }
    @keyframes fadeIn { from { opacity: 0.6; } to { opacity: 1; } }
    .service-text h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-img {
      width: 200px;
      border-radius: 12px;
      object-fit: cover;
    }

    /* 数据对比 */
    .compare-split {
      display: flex;
      gap: 0;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .compare-left, .compare-right {
      flex: 1;
      padding: 48px 36px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .compare-left {
      background: #2a2a2a;
      color: #ddd;
    }
    .compare-right {
      background: #fdf2f0;
      color: var(--secondary);
    }
    .vs-badge {
      background: var(--white);
      border-radius: 50%;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary);
      margin: auto;
      box-shadow: var(--shadow-card);
    }
    .progress-bar {
      height: 10px;
      background: rgba(255,255,255,0.2);
      border-radius: 5px;
      width: 100%;
      margin-top: 6px;
    }
    .progress-fill {
      height: 100%;
      background: var(--success);
      border-radius: 5px;
      width: 0%;
    }

    /* 流程 */
    .steps-row {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      position: relative;
    }
    .step-item {
      text-align: center;
      flex: 1;
      position: relative;
    }
    .step-dot {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--primary);
      margin: 0 auto 16px;
      position: relative;
      z-index: 2;
    }
    .step-line {
      position: absolute;
      top: 12px;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(to right, var(--primary), var(--gray-light));
      z-index: 1;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 240px 1fr;
      gap: 48px;
    }
    .faq-category h4 {
      font-weight: 700;
      margin-bottom: 16px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      border-bottom: 1px solid var(--gray-light);
      padding: 18px 0;
    }
    .faq-question {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-soft);
    }

    /* CTA 表单 */
    .cta-dark {
      background: var(--secondary);
      color: white;
      padding: 80px 0;
      text-align: center;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
      margin-top: 32px;
    }
    .cta-input {
      padding: 14px 18px;
      border-radius: var(--radius-btn);
      border: none;
      background: rgba(255,255,255,0.1);
      color: white;
      min-width: 200px;
    }
    .trust-badge {
      margin-top: 20px;
      color: rgba(255,255,255,0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    /* 页脚 */
    .footer {
      background: var(--secondary);
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .advantages-grid { grid-template-columns: repeat(2,1fr); }
      .service-matrix { flex-direction: column; }
      .service-tabs { flex-direction: row; overflow-x: auto; }
      .faq-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .container { padding: 0 24px; }
      .advantages-grid { grid-template-columns: 1fr; }
      .compare-split { flex-direction: column; }
      .hero .container { flex-direction: column; }
      .steps-row { flex-direction: column; gap: 24px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }