/* roulang page: index */
:root {
      --primary-deep-teal: #0B3B3C;
      --primary-teal-light: #0F4A4B;
      --accent-champagne: #C8A96E;
      --accent-champagne-dark: #B8944F;
      --highlight-coral: #E8614D;
      --bg-warm-white: #FAF8F5;
      --bg-light-mint: #F0F4F3;
      --card-white: #FFFFFF;
      --text-dark: #2C3E3E;
      --text-gray: #5A6A6A;
      --text-light-gray: #D5DBDB;
      --border-subtle: rgba(200,169,110,0.3);
      --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Noto Sans SC', sans-serif;
      --font-data: 'Inter', sans-serif;
      --max-width: 1280px;
      --nav-height: 64px;
    }

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

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

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

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }

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

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }

    /* ---------- 导航栏 ---------- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: var(--bg-warm-white);
      border-bottom: 1px solid rgba(0,0,0,0.04);
      z-index: 1000;
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }

    .logo {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 20px;
      color: var(--primary-deep-teal);
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-links a {
      font-size: 15px;
      color: var(--text-dark);
      font-weight: 500;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-deep-teal);
    }

    .nav-links a::after {
      content: '';
      display: block;
      width: 0;
      height: 2px;
      background: var(--accent-champagne);
      transition: width 0.2s;
      position: absolute;
      bottom: -4px;
      left: 0;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .btn-cta-nav {
      background: var(--accent-champagne);
      color: var(--primary-deep-teal);
      font-weight: 600;
      font-size: 15px;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: background 0.2s;
      white-space: nowrap;
      font-family: var(--font-data);
    }

    .btn-cta-nav:hover {
      background: var(--accent-champagne-dark);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-deep-teal);
      cursor: pointer;
    }

    @media (max-width: 1024px) {
      .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--primary-deep-teal);
        flex-direction: column;
        padding: 32px 20px;
        gap: 24px;
        box-shadow: 0 12px 24px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        color: var(--text-light-gray);
        font-size: 18px;
      }
      .menu-toggle {
        display: block;
      }
      .btn-cta-nav {
        background: var(--accent-champagne);
        color: var(--primary-deep-teal);
        width: fit-content;
      }
    }

    /* ---------- Hero 分屏 ---------- */
    .hero {
      display: flex;
      min-height: calc(100vh - var(--nav-height));
    }

    .hero-data {
      flex: 1;
      background: linear-gradient(135deg, var(--primary-deep-teal) 0%, var(--primary-teal-light) 100%);
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 64px 48px;
      color: white;
      position: relative;
      overflow: hidden;
    }

    .hero-data::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
      pointer-events: none;
    }

    .data-metric {
      margin-bottom: 36px;
      position: relative;
      z-index: 2;
    }

    .data-number {
      font-family: var(--font-data);
      font-size: 36px;
      font-weight: 700;
      color: var(--accent-champagne);
      letter-spacing: 0.5px;
      line-height: 1.2;
    }

    .data-label {
      font-size: 14px;
      color: rgba(255,255,255,0.8);
      margin-top: 6px;
    }

    .gold-divider {
      width: 60px;
      height: 1px;
      background: rgba(200,169,110,0.4);
      margin: 24px 0;
      position: relative;
      z-index: 2;
    }

    .hero-content {
      flex: 1;
      background: var(--bg-warm-white);
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 64px 48px;
    }

    .hero-content h1 {
      font-family: var(--font-serif);
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-deep-teal);
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-gray);
      margin-bottom: 36px;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--accent-champagne);
      color: var(--primary-deep-teal);
      font-weight: 600;
      font-size: 18px;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: background 0.2s, transform 0.1s;
      font-family: var(--font-data);
    }

    .btn-primary:hover {
      background: var(--accent-champagne-dark);
    }

    .btn-secondary-link {
      font-size: 16px;
      color: var(--primary-deep-teal);
      font-weight: 500;
      border-bottom: 1.5px solid transparent;
      transition: border-color 0.2s;
    }

    .btn-secondary-link:hover {
      border-bottom-color: var(--primary-deep-teal);
    }

    @media (max-width: 1024px) {
      .hero {
        flex-direction: column;
      }
      .hero-data {
        padding: 40px 32px;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 24px;
        justify-content: center;
      }
      .hero-data .data-metric {
        margin-bottom: 0;
        text-align: center;
      }
      .hero-content {
        padding: 48px 32px;
      }
      .hero-content h1 {
        font-size: 40px;
      }
    }

    @media (max-width: 768px) {
      .hero-data {
        padding: 32px 20px;
      }
      .data-number {
        font-size: 28px;
      }
      .hero-content h1 {
        font-size: 32px;
      }
    }

    /* ---------- 通用板块 ---------- */
    section {
      padding: 80px 0;
    }

    .section-title {
      font-family: var(--font-serif);
      font-size: 36px;
      font-weight: 700;
      color: var(--primary-deep-teal);
      margin-bottom: 48px;
      text-align: center;
    }

    @media (max-width: 768px) {
      .section-title {
        font-size: 28px;
      }
    }

    /* ---------- 核心服务 2x3 ---------- */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: transform 0.2s, box-shadow 0.2s;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }

    .service-img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 20px;
      background: #f0f4f3;
    }

    .service-card h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary-deep-teal);
      margin-bottom: 8px;
    }

    .service-stat {
      font-family: var(--font-data);
      font-size: 28px;
      font-weight: 700;
      color: var(--highlight-coral);
      margin-bottom: 10px;
    }

    .service-desc {
      font-size: 14px;
      color: var(--text-gray);
      line-height: 1.6;
    }

    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ---------- 结果对比区 ---------- */
    .comparison-section {
      background: linear-gradient(135deg, var(--primary-deep-teal) 0%, #0F4A4B 100%);
      color: white;
    }

    .comparison-wrapper {
      display: flex;
      gap: 48px;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
    }

    .comparison-col {
      flex: 1;
      min-width: 280px;
    }

    .comparison-title {
      font-family: var(--font-serif);
      font-size: 22px;
      margin-bottom: 24px;
      color: var(--accent-champagne);
    }

    .compare-row {
      margin-bottom: 28px;
    }

    .compare-label {
      font-size: 16px;
      margin-bottom: 8px;
      display: flex;
      justify-content: space-between;
    }

    .bar-bg {
      background: rgba(255,255,255,0.15);
      height: 8px;
      border-radius: 4px;
      overflow: hidden;
    }

    .bar-fill {
      height: 100%;
      background: var(--accent-champagne);
      border-radius: 4px;
      width: 0%;
    }

    .gold-vertical-divider {
      width: 2px;
      height: 240px;
      background: rgba(200,169,110,0.5);
    }

    @media (max-width: 768px) {
      .comparison-wrapper {
        flex-direction: column;
        gap: 32px;
      }
      .gold-vertical-divider {
        display: none;
      }
    }

    /* ---------- 流程 ---------- */
    .steps-container {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      text-align: center;
      gap: 16px;
    }

    .step-item {
      flex: 1;
      position: relative;
    }

    .step-circle {
      width: 56px;
      height: 56px;
      background: var(--primary-deep-teal);
      color: var(--accent-champagne);
      border-radius: 50%;
      font-family: var(--font-data);
      font-weight: 700;
      font-size: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .step-title {
      font-weight: 700;
      font-size: 18px;
      color: var(--primary-deep-teal);
      margin-bottom: 6px;
    }

    .step-desc {
      font-size: 14px;
      color: var(--text-gray);
    }

    .steps-connector {
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 24px 0;
      gap: 8px;
      color: var(--accent-champagne);
      opacity: 0.6;
    }

    @media (max-width: 768px) {
      .steps-container {
        flex-direction: column;
        gap: 32px;
      }
    }

    /* ---------- FAQ ---------- */
    .faq-section {
      background: var(--bg-light-mint);
    }

    .faq-group {
      margin-bottom: 36px;
    }

    .faq-group-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-deep-teal);
      margin-bottom: 16px;
    }

    .faq-item {
      background: var(--card-white);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 28px;
      font-weight: 700;
      font-size: 18px;
      color: var(--primary-deep-teal);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--card-white);
      border: none;
      width: 100%;
      text-align: left;
      transition: background 0.2s;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 28px;
      color: var(--text-gray);
      font-size: 16px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 28px 20px;
    }

    /* ---------- 表单 ---------- */
    .contact-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 48px;
      box-shadow: var(--shadow-card);
      max-width: 600px;
      margin: 0 auto;
    }

    .form-group {
      margin-bottom: 20px;
    }

    input, textarea {
      width: 100%;
      padding: 14px 18px;
      border: 1px solid #ddd;
      border-radius: var(--radius-input);
      font-size: 16px;
      background: #fbfbfb;
      transition: border 0.2s;
    }

    input:focus, textarea:focus {
      border-color: var(--primary-deep-teal);
    }

    .btn-full {
      width: 100%;
      background: var(--accent-champagne);
      color: var(--primary-deep-teal);
      font-weight: 700;
      font-size: 18px;
      padding: 16px;
      border: none;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: background 0.2s;
    }

    .trust-note {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-top: 16px;
      font-size: 14px;
      color: var(--text-gray);
      justify-content: center;
    }

    /* ---------- 页脚 ---------- */
    .site-footer {
      background: var(--primary-deep-teal);
      color: var(--text-light-gray);
      padding: 64px 0 32px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer-logo {
      font-family: var(--font-serif);
      font-size: 22px;
      font-weight: 700;
      color: white;
      margin-bottom: 12px;
    }

    .footer a {
      color: var(--text-light-gray);
      display: block;
      margin-bottom: 8px;
    }

    .footer a:hover {
      color: var(--accent-champagne);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }