/* roulang page: index */
:root {
      --primary-orange: #FF5F1F;
      --deep-black: #0B0C10;
      --silver: #C0C0C0;
      --matte-white: #F8F9FA;
      --light-carbon: #2D2F33;
      --text-dark: #1a1a1a;
      --text-soft: #555;
      --text-light-soft: #cccccc;
      --radius-card: 12px;
      --radius-pill: 50px;
      --shadow-default: 0 4px 12px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.08);
      --shadow-hover: 0 12px 24px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.1);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
      --section-gap: 100px;
      --max-width: 1200px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: #ffffff;
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    /* 导航沉浸式头部 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
      background: rgba(11,12,16,0.55);
      backdrop-filter: blur(15px);
      -webkit-backdrop-filter: blur(15px);
      transition: background 0.3s ease, box-shadow 0.3s ease;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .navbar.scrolled {
      background: var(--deep-black);
      box-shadow: 0 6px 15px rgba(0,0,0,0.3);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 28px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #ffffff;
      display: flex;
      align-items: center;
      gap: 3px;
    }
    .logo .u-shape {
      color: var(--primary-orange);
      text-shadow: 0 0 8px rgba(255,95,31,0.5);
      transform: rotate(-2deg);
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      color: #e0e0e0;
      font-weight: 500;
      font-size: 15px;
      position: relative;
      transition: color 0.2s;
      padding: 6px 0;
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary-orange);
      transition: width 0.2s ease;
    }
    .nav-links a.active, .nav-links a:hover {
      color: var(--primary-orange);
    }
    .nav-links a.active::after, .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta-btn {
      background: var(--primary-orange);
      color: #fff;
      border-radius: 30px;
      padding: 8px 22px;
      font-weight: 600;
      border: none;
      font-size: 14px;
      transition: background 0.25s, box-shadow 0.25s;
      box-shadow: 0 0 8px rgba(255,95,31,0.4);
    }
    .nav-cta-btn:hover {
      background: #e54c0c;
      box-shadow: 0 0 14px rgba(255,95,31,0.7);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: 0.2s;
    }
    .mobile-drawer {
      display: none;
    }
    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      display: flex;
      align-items:中心;
      color: #fff;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(11,12,16,0.8) 0%, rgba(11,12,16,0.4) 100%);
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: flex-start;
      height: 100%;
    }
    .hero-text {
      max-width: 650px;
    }
    .hero h1 {
      font-size: clamp(40px, 5.5vw, 64px);
      font-weight: 700;
      line-height: 1.15;
      margin-bottom: 22px;
    }
    .hero h1 span {
      color: var(--primary-orange);
      position: relative;
    }
    .hero-sub {
      font-size: 18px;
      line-height: 1.5;
      color: rgba(255,255,255,0.85);
      margin-bottom: 38px;
    }
    .hero-buttons {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-orange);
      border: none;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: 0.2s;
      cursor: pointer;
      box-shadow: 0 8px 18px rgba(255,95,31,0.25);
    }
    .btn-primary:hover {
      background: #e74c0c;
      box-shadow: 0 12px 24px rgba(255,95,31,0.5);
    }
    .btn-ghost {
      background: transparent;
      border: 2px solid var(--primary-orange);
      color: var(--primary-orange);
      padding: 12px 34px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-ghost:hover {
      background: var(--primary-orange);
      color: #fff;
    }
    /* 泛用区块标题 */
    .section-title {
      font-size: 38px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .section-sub {
      color: #777;
      font-size: 17px;
      max-width: 630px;
    }
    .dark-bg {
      background: var(--light-carbon);
      color: #f0f0f0;
    }
    .dark-bg .section-sub {
      color: #aaa;
    }
    /* 痛点 */
    #problem .problem-grid {
      display: flex;
      gap: 32px;
      margin-top: 48px;
    }
    .prob-left, .prob-right {
      flex: 1;
      padding: 28px;
      border-radius: var(--radius-card);
    }
    .prob-left {
      background: #f2f2f2;
      color: #333;
      border: 1px solid #e0e0e0;
    }
    .prob-right {
      background: var(--matte-white);
      border: 1px solid #ddd;
      box-shadow: var(--shadow-default);
    }
    /* solution 卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
      margin-top: 42px;
    }
    .u-card {
      background: var(--matte-white);
      padding: 32px 22px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-default);
      transition: all 0.25s;
      border: 1px solid #eee;
    }
    .u-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .u-card-icon {
      font-size: 38px;
      color: var(--silver);
      margin-bottom: 18px;
      transition: color 0.3s;
    }
    .u-card:hover .u-card-icon {
      color: var(--primary-orange);
    }
    /* statistics */
    .stat-row {
      display: flex;
      gap: 28px;
      justify-content: space-around;
      flex-wrap: wrap;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-orange);
    }
    /* testimonial brick */
    .testimonial-masonry {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
      margin-top: 46px;
    }
    .testimonial-card {
      background: var(--matte-white);
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-default);
    }
    /* FAQ accordion */
    .faq-item {
      border-bottom: 1px solid #ccc;
      margin-bottom: 12px;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      padding: 18px 0;
      cursor: pointer;
      font-weight: 600;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: #444;
    }
    /* CTA stripe */
    .cta-stripe {
      background: var(--primary-orange);
      padding: 70px 24屁0若有误 field CSS ห่างไร不错);
    }

    @media (max-width: 1024px) {
      .cards-grid { grid-template-columns: repeat(2,1fr); }
      .testimonial-masonry { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .hamburger { display: flex; }
      .nav-links { display: none; }
      .mobile-drawer.active { display: flex; flex-direction: column; background: var(--deep-black); position: fixed; inset: 0; padding: 90px 30伝う } 
      .problem-grid { flex-direction: column; }
      .cards-grid, .testimonial-masonry { grid-template-columns: 1fr; }
      .section-title { font-size: 30px; }
    }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1Dir親 });