/* roulang page: index */
:root {
      --primary-deep: #3E2723;
      --accent-gold: #C9A84C;
      --accent-gold-hover: #B8933A;
      --bg-warm: #F9F6F0;
      --white: #FFFFFF;
      --text-dark: #2C2416;
      --text-muted: #5E5547;
      --border-light: rgba(62,39,35,0.08);
      --shadow-card: 0 4px 20px rgba(62,39,35,0.06);
      --shadow-hover: 0 12px 28px rgba(62,39,35,0.10);
      --radius-lg: 12px;
      --radius-btn: 8px;
      --transition: all 0.3s ease;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Noto Sans SC', sans-serif;
      --font-number: 'Inter', sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }

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

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

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(249,246,240,0.85);
      backdrop-filter: blur(12px);
      transition: var(--transition);
      border-bottom: 1px solid transparent;
    }

    .header.scrolled {
      background: var(--bg-warm);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 80px;
    }

    .logo {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 2px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo i {
      color: var(--accent-gold);
      font-size: 2rem;
    }

    .nav-links {
      display: flex;
      gap: 2.5rem;
      align-items: center;
      list-style: none;
    }

    .nav-links a {
      font-family: var(--font-sans);
      font-weight: 500;
      color: var(--primary-deep);
      position: relative;
      padding: 4px 0;
      transition: color 0.3s;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.3s;
    }

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

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
      cursor: pointer;
    }

    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      max-width: 400px;
      height: 100vh;
      background: var(--primary-deep);
      backdrop-filter: blur(20px);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 2.5rem;
      z-index: 999;
      transition: right 0.4s ease;
      display: flex;
    }

    .mobile-menu.active {
      right: 0;
    }

    .mobile-menu a {
      color: var(--accent-gold);
      font-size: 1.5rem;
      font-weight: 500;
    }

    .mobile-close {
      position: absolute;
      top: 30px;
      right: 30px;
      background: none;
      border: none;
      color: var(--accent-gold);
      font-size: 2rem;
      cursor: pointer;
    }

    /* 按钮 */
    .btn {
      display: inline-block;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-family: var(--font-sans);
      transition: var(--transition);
      text-align: center;
      cursor: pointer;
      border: none;
      font-size: 1rem;
    }

    .btn-primary {
      background: var(--accent-gold);
      color: var(--primary-deep);
      box-shadow: 0 4px 12px rgba(201,168,76,0.3);
    }

    .btn-primary:hover {
      background: var(--accent-gold-hover);
      transform: scale(1.02);
      box-shadow: 0 8px 20px rgba(184,147,58,0.4);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
    }

    .btn-outline:hover {
      background: var(--primary-deep);
      color: var(--white);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      padding-top: 80px;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 50%, rgba(62,39,35,0.7) 0%, rgba(20,10,5,0.9) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 60px;
      width: 100%;
    }

    .hero-text {
      flex: 1;
    }

    .hero h1 {
      font-family: var(--font-serif);
      font-size: clamp(3rem, 8vw, 56px);
      line-height: 1.2;
      color: white;
      margin-bottom: 1.5rem;
    }

    .hero h1 .gold {
      color: var(--accent-gold);
    }

    .hero-sub {
      font-size: 1.25rem;
      color: rgba(255,255,240,0.9);
      letter-spacing: 2px;
      margin-bottom: 2.5rem;
      max-width: 600px;
    }

    .hero-image {
      flex: 1;
      display: flex;
      justify-content: center;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.4));
    }

    .hero-image img {
      max-height: 500px;
      object-fit: contain;
    }

    /* 板块通用 */
    section {
      padding: 120px 0;
    }

    .section-title {
      font-family: var(--font-serif);
      font-size: clamp(2rem, 5vw, 40px);
      color: var(--primary-deep);
      margin-bottom: 1rem;
      text-align: center;
    }

    .section-sub {
      color: var(--text-muted);
      text-align: center;
      max-width: 700px;
      margin: 0 auto 3rem;
      font-size: 1.1rem;
    }

    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 2rem;
    }

    .pain-card {
      background: var(--white);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }

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

    .pain-icon {
      font-size: 2.2rem;
      color: var(--accent-gold);
    }

    .pain-card h3 {
      font-family: var(--font-serif);
      font-size: 1.4rem;
      margin-bottom: 0.5rem;
    }

    /* 解决方案不对称网格 */
    .solution-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      margin-top: 2rem;
    }

    .solution-item {
      background: var(--white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .solution-item.large {
      grid-row: span 2;
    }

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

    .solution-img {
      height: 220px;
      overflow: hidden;
    }

    .solution-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .solution-text {
      padding: 28px;
    }

    .solution-text h3 {
      font-family: var(--font-serif);
      font-size: 1.6rem;
      margin-bottom: 0.8rem;
    }

    /* 数据区 */
    .stats-band {
      background: var(--primary-deep);
      color: white;
      padding: 70px 0;
    }

    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
      gap: 2rem;
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    .stat-label {
      font-size: 1.1rem;
      opacity: 0.9;
    }

    /* 证言横向滚动 */
    .testimonial-scroll {
      display: flex;
      gap: 30px;
      overflow-x: auto;
      padding: 20px 0 40px;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }

    .testimonial-card {
      min-width: 320px;
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      scroll-snap-align: start;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .testimonial-header {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .testimonial-header img {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      object-fit: cover;
    }

    .quote {
      font-style: italic;
      color: var(--text-dark);
      line-height: 1.7;
    }

    .gold-line {
      width: 40px;
      height: 2px;
      background: var(--accent-gold);
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
      overflow: hidden;
      background: var(--white);
      box-shadow: var(--shadow-card);
    }

    .faq-question {
      background: var(--primary-deep);
      color: white;
      padding: 20px 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 500;
      font-size: 1.1rem;
    }

    .faq-question i {
      color: var(--accent-gold);
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 28px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s;
      background: var(--bg-warm);
      color: var(--text-dark);
    }

    .faq-item.active .faq-answer {
      padding: 20px 28px;
      max-height: 300px;
    }

    .faq-item.active .faq-question i {
      transform: rotate(45deg);
    }

    /* CTA */
    .cta-section {
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      position: relative;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(62,39,35,0.85);
    }

    .cta-content {
      position: relative;
      z-index: 2;
      text-align: center;
      color: white;
    }

    /* 页脚 */
    .footer {
      background: var(--primary-deep);
      color: var(--accent-gold);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer a {
      color: var(--accent-gold);
      opacity: 0.8;
      transition: 0.3s;
    }

    .footer a:hover {
      opacity: 1;
      color: white;
    }

    .copyright {
      border-top: 1px solid rgba(201,168,76,0.3);
      padding-top: 20px;
      text-align: center;
      font-size: 0.9rem;
    }

    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      .hero-content { flex-direction: column; }
      .hero-image img { max-height: 350px; }
      .pain-grid { grid-template-columns: 1fr; }
      .solution-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      section { padding: 80px 0; }
      .footer-grid { grid-template-columns: 1fr; }
      .stats-grid { flex-direction: column; }
    }