/* roulang page: index */
:root {
      --deep-burgundy: #8B1A2B;
      --dark-gold: #C9A84C;
      --bright-gold: #E0C46C;
      --ink-black: #1A1A1A;
      --pure-black: #0D0D0D;
      --deep-gray: #2A2A2A;
      --warm-gray: #3A3A3A;
      --ivory-white: #F5F0E8;
      --soft-gray: #B0A89C;
      --felt-green: #2E5C3E;
      --card-bg: rgba(20,20,20,0.85);
      --card-border: 1px solid var(--dark-gold);
      --shadow-deep: 0 4px 20px rgba(0,0,0,0.6);
      --shadow-glow: 0 0 15px rgba(201,168,76,0.3);
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', 'Inter', 'Helvetica Neue', sans-serif;
      --font-number: 'Inter', 'Arial', sans-serif;
      --border-radius: 8px;
      --transition-smooth: all 0.3s ease;
      --section-gap: 120px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--ink-black);
      color: var(--soft-gray);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-weight: 400;
      margin: 0;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航栏 */
    .top-bar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 10, 10, 0.75);
      backdrop-filter: blur(15px);
      border-bottom: 1px solid rgba(201,168,76,0.25);
      transition: var(--transition-smooth);
      padding: 0.5rem 0;
    }

    .top-bar-custom.scrolled {
      background: rgba(10, 10, 10, 0.92);
      box-shadow: 0 4px 25px rgba(0,0,0,0.7);
    }

    .nav-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1300px;
      margin: 0 auto;
      padding: 0 25px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-icon {
      font-size: 28px;
      color: var(--dark-gold);
      transform: rotate(45deg);
      display: inline-block;
    }

    .logo-text {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--ivory-white);
      letter-spacing: 2px;
      line-height: 1.2;
    }

    .logo-text span {
      color: var(--dark-gold);
    }

    .nav-links {
      display: flex;
      gap: 2.2rem;
      align-items: center;
    }

    .nav-links a {
      font-family: var(--font-sans);
      font-weight: 400;
      font-size: 1rem;
      color: var(--ivory-white);
      position: relative;
      padding: 0.25rem 0;
      transition: var(--transition-smooth);
      letter-spacing: 1px;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--dark-gold);
      transition: width 0.25s ease;
    }

    .nav-links a:hover {
      color: var(--bright-gold);
    }

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

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .vip-badge {
      background: var(--deep-burgundy);
      color: var(--ivory-white);
      padding: 0.25rem 0.8rem;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .btn-gold {
      background: var(--dark-gold);
      color: var(--ink-black);
      font-weight: 700;
      padding: 0.65rem 1.8rem;
      border-radius: 4px;
      font-size: 0.9rem;
      letter-spacing: 1px;
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
      white-space: nowrap;
    }

    .btn-gold:hover {
      background: var(--bright-gold);
      box-shadow: 0 0 18px rgba(201,168,76,0.5);
      color: #000;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--dark-gold);
      font-size: 2rem;
      cursor: pointer;
    }

    /* Hero */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(180deg, rgba(0,0,0,0.65) 0%, rgba(20,0,0,0.88) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      padding-top: 80px;
    }

    .hero-content {
      max-width: 950px;
      padding: 0 25px;
    }

    .hero-content h1 {
      font-family: var(--font-serif);
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--ivory-white);
      letter-spacing: 0.03em;
      margin-bottom: 1.2rem;
      text-shadow: 0 4px 15px rgba(0,0,0,0.5);
    }

    .hero-sub {
      font-size: 1.3rem;
      color: var(--soft-gray);
      margin-bottom: 2.5rem;
    }

    .hero-buttons {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 3.5rem;
    }

    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--dark-gold);
      color: var(--ivory-white);
      padding: 0.7rem 2.2rem;
      border-radius: 4px;
      font-weight: 600;
      transition: var(--transition-smooth);
    }

    .btn-outline-gold:hover {
      background: rgba(201,168,76,0.12);
      border-color: var(--bright-gold);
      color: var(--bright-gold);
    }

    .hero-stats {
      display: flex;
      justify-content: center;
      gap: 3.5rem;
      flex-wrap: wrap;
      margin-top: 1rem;
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--dark-gold);
      text-shadow: 0 0 12px rgba(201,168,76,0.4);
      display: block;
    }

    .stat-label {
      color: var(--soft-gray);
      font-size: 0.9rem;
      letter-spacing: 1px;
    }

    /* 通用板块 */
    section {
      padding: var(--section-gap) 0;
    }

    .section-title {
      font-family: var(--font-serif);
      font-size: 2.2rem;
      color: var(--ivory-white);
      margin-bottom: 3rem;
      position: relative;
      display: inline-block;
      padding-left: 28px;
    }

    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 8px;
      height: 28px;
      background: var(--dark-gold);
      border-radius: 2px;
    }

    /* 实力 */
    .strength-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 30px;
    }

    .strength-card {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--border-radius);
      padding: 2rem;
      backdrop-filter: blur(10px);
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-deep);
    }

    .strength-card:hover {
      border-color: var(--bright-gold);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    .strength-icon {
      font-size: 2.5rem;
      color: var(--dark-gold);
      margin-bottom: 1rem;
    }

    .strength-card h3 {
      font-family: var(--font-sans);
      color: var(--ivory-white);
      font-size: 1.5rem;
      margin-bottom: 0.8rem;
    }

    /* 服务手风琴 */
    .accordion-custom .accordion-item {
      background: transparent;
      border: none;
      margin-bottom: 15px;
    }

    .accordion-title {
      background: var(--card-bg);
      border: 1px solid rgba(201,168,76,0.4);
      color: var(--ivory-white);
      font-weight: 600;
      padding: 1rem 1.8rem;
      border-radius: 6px;
      font-size: 1.1rem;
      transition: var(--transition-smooth);
    }

    .accordion-title:hover {
      border-color: var(--dark-gold);
      background: rgba(30,30,30,0.9);
    }

    .accordion-content {
      background: rgba(30,30,30,0.8);
      border: none;
      color: var(--soft-gray);
      padding: 1.5rem;
      border-radius: 0 0 6px 6px;
    }

    /* 案例卡片 */
    .case-card {
      background: var(--card-bg);
      border: var(--card-border);
      border-radius: var(--border-radius);
      display: flex;
      margin-bottom: 28px;
      overflow: hidden;
      transition: var(--transition-smooth);
    }

    .case-card:hover {
      border-color: var(--bright-gold);
      box-shadow: var(--shadow-glow);
    }

    .case-img {
      width: 45%;
      background-size: cover;
      background-position: center;
      min-height: 240px;
    }

    .case-info {
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .progress-bar {
      background: #333;
      height: 8px;
      border-radius: 4px;
      margin: 0.8rem 0 1.2rem;
    }

    .progress-fill {
      background: var(--dark-gold);
      height: 100%;
      border-radius: 4px;
      width: 0%;
      transition: width 1.5s ease;
    }

    /* FAQ */
    .faq-accordion .accordion-title {
      background: rgba(20,20,20,0.8);
      border-left: 4px solid transparent;
    }

    .faq-accordion .accordion-title:hover {
      border-left-color: var(--dark-gold);
    }

    .faq-accordion .is-active .accordion-title {
      border-left-color: var(--dark-gold);
      background: rgba(40,40,40,0.9);
    }

    /* 表单 */
    .contact-form input, .contact-form textarea {
      background: #2A2A2A;
      border: 1px solid var(--dark-gold);
      color: var(--ivory-white);
      border-radius: 4px;
      padding: 0.8rem;
    }

    .contact-form input:focus, .contact-form textarea:focus {
      border-color: var(--bright-gold);
      box-shadow: 0 0 12px rgba(201,168,76,0.4);
    }

    /* 页脚 */
    .footer {
      background: #0A0A0A;
      border-top: 1px solid var(--dark-gold);
      padding: 3rem 0 1.5rem;
    }

    @media (max-width: 1024px) {
      .nav-links { gap: 1.5rem; }
      .strength-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta .vip-badge { display: none; }
      .mobile-toggle { display: block; }
      .nav-cta { margin-left: auto; }
      .hero-content h1 { font-size: 2.5rem; }
      .case-card { flex-direction: column; }
      .case-img { width: 100%; height: 200px; }
      section { padding: 80px 0; }
    }