/* roulang page: index */
:root {
      --deep-navy: #0f1a2e;
      --warm-gold: #c8a96e;
      --warm-white: #f7f5f2;
      --carbon: #1c1c1c;
      --mid-gray: #5c5c5c;
      --light-gray: #8a8a8a;
      --border-soft: #e5e0da;
      --card-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
      --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --transition-smooth: 0.35s ease;
      --transition-fast: 0.3s;
      --font-serif-en: 'Cormorant Garamond', 'Playfair Display', serif;
      --font-sans-zh: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans-zh);
      background-color: var(--warm-white);
      color: var(--carbon);
      margin: 0;
      line-height: 1.75;
      font-weight: 400;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      font-family: var(--font-sans-zh);
      font-weight: 600;
      letter-spacing: -0.02em;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-fast);
    }

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

    .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航 */
    .navbar-custom {
      height: 72px;
      background: transparent;
      transition: background 0.3s, backdrop-filter 0.3s;
      z-index: 1000;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
    }

    .navbar-scrolled {
      background: rgba(247, 245, 242, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }

    .brand-logo {
      font-family: var(--font-sans-zh);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--deep-navy);
      letter-spacing: 0.02em;
      white-space: nowrap;
    }
    .brand-logo small {
      font-size: 0.65rem;
      font-weight: 400;
      color: var(--mid-gray);
      display: block;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-top: -4px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 40px;
    }

    .nav-link-item {
      font-size: 0.95rem;
      font-weight: 400;
      color: var(--mid-gray);
      position: relative;
      padding: 4px 0;
      transition: color 0.3s;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .nav-link-item:hover {
      color: var(--warm-gold);
    }
    .nav-link-item.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 2px;
      background: var(--warm-gold);
    }

    .nav-divider {
      width: 1px;
      height: 16px;
      background: var(--border-soft);
      display: inline-block;
    }

    .nav-cta-light {
      color: var(--warm-gold);
      font-weight: 500;
      margin-left: 16px;
      font-size: 0.95rem;
      border-bottom: 1px solid transparent;
    }
    .nav-cta-light:hover {
      border-bottom: 1px solid var(--warm-gold);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--deep-navy);
      transition: 0.3s;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(247,245,242,0.98);
      backdrop-filter: blur(12px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 32px;
      z-index: 999;
      transform: translateX(100%);
      transition: transform 0.4s ease;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu a {
      font-size: 1.25rem;
      color: var(--deep-navy);
      font-weight: 500;
    }

    /* Hero */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(15,26,46,0.88) 0%, rgba(15,26,46,0.45) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      padding-top: 72px;
    }
    .hero-title {
      font-size: clamp(2.5rem, 5vw, 4rem);
      font-weight: 700;
      color: white;
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 1.25rem;
      font-weight: 300;
      color: rgba(255,255,255,0.85);
      margin-top: 24px;
    }
    .btn-primary-gold {
      background: var(--deep-navy);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 500;
      border: none;
      transition: 0.3s;
      display: inline-block;
      margin-top: 32px;
    }
    .btn-primary-gold:hover {
      background: var(--warm-gold);
      transform: translateY(-2px);
      color: white;
    }
    .stat-number {
      font-family: var(--font-serif-en);
      font-size: 2.5rem;
      color: var(--warm-gold);
      font-weight: 600;
    }

    /* 板块标题 */
    .section-title {
      font-size: 2rem;
      font-weight: 600;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 40px;
      height: 2px;
      background: var(--warm-gold);
      margin-top: 8px;
    }
    .section-sub {
      color: var(--mid-gray);
      margin-bottom: 48px;
    }

    /* 痛点 */
    .pain-quote {
      font-size: 1.25rem;
      color: var(--light-gray);
      line-height: 1.8;
      position: relative;
      padding-left: 32px;
    }
    .pain-quote::before {
      content: '“';
      font-size: 5rem;
      color: var(--warm-gold);
      position: absolute;
      left: -8px;
      top: -24px;
      font-family: var(--font-serif-en);
    }

    /* 解决方案卡片错落 */
    .solution-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      border-left: 3px solid var(--warm-gold);
      height: 100%;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    .middle-card {
      margin-top: -20px;
      box-shadow: 0 12px 28px rgba(0,0,0,0.08);
    }
    .card-icon {
      color: var(--warm-gold);
      margin-bottom: 20px;
    }
    .text-link-gold {
      color: var(--warm-gold);
      border-bottom: 1px solid var(--warm-gold);
      font-weight: 500;
      display: inline-block;
      margin-top: 16px;
    }
    .text-link-gold:hover {
      border-bottom-width: 2px;
    }

    /* 成果数据卡 */
    .result-card {
      background: #faf9f7;
      border-right: 1px solid var(--border-soft);
      padding: 32px 16px;
      text-align: center;
    }
    .big-number {
      font-family: var(--font-serif-en);
      font-size: 2.8rem;
      color: var(--deep-navy);
    }

    /* 证言 */
    .testimonial-block {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .testimonial-text {
      font-style: italic;
      font-size: 1.1rem;
      color: var(--carbon);
    }
    .testimonial-author {
      color: var(--warm-gold);
      font-weight: 600;
    }

    /* FAQ */
    .accordion-button-custom {
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
      padding: 20px 0;
      font-size: 1.125rem;
      font-weight: 500;
      color: var(--carbon);
      border-bottom: 1px solid var(--border-soft);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-body-custom {
      padding: 16px 0 16px 12px;
      color: var(--mid-gray);
      border-left: 3px solid var(--warm-gold);
      margin-left: 4px;
    }

    /* CTA深色区 */
    .cta-dark {
      background: var(--deep-navy);
      color: white;
    }
    .btn-outline-light-custom {
      border: 1.5px solid white;
      background: transparent;
      color: white;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      transition: 0.3s;
    }
    .btn-outline-light-custom:hover {
      background: white;
      color: var(--deep-navy);
    }
    .form-control-custom {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: var(--radius-input);
      padding: 12px 16px;
      color: white;
    }
    .form-control-custom:focus {
      border-color: var(--warm-gold);
      box-shadow: none;
      outline: none;
    }
    .footer-dark {
      background: var(--deep-navy);
      color: rgba(255,255,255,0.7);
    }

    @media (max-width: 991px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .middle-card { margin-top: 0; }
      .testimonial-img-order { order: -1; }
    }
    @media (max-width: 767px) {
      .section-title { font-size: 1.5rem; }
      .hero-title { font-size: 2rem; }
    }