:root {
      --black: #0a0a0a;
      --white: #f7f7f2;
      --gray: #8f8f8a;
      --soft-gray: #d8d8d2;
      --line: rgba(255, 255, 255, 0.14);
      --dark-line: rgba(0, 0, 0, 0.12);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: Arial, Helvetica, sans-serif;
      background: var(--white);
      color: var(--black);
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 76px;
      z-index: 1000;
      background: rgba(10, 10, 10, 0.88);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--line);
    }

    .navbar {
      width: min(1200px, 92%);
      height: 100%;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand {
      font-size: 26px;
      letter-spacing: 0.28em;
      font-weight: 500;
      color: var(--white);
    }

    nav {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    nav a {
      color: var(--white);
      font-size: 13px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      padding: 11px 16px;
      border: 1px solid transparent;
      transition: 0.3s ease;
    }

    nav a:hover {
      border-color: var(--line);
      background: rgba(255, 255, 255, 0.08);
    }

    .nav-order {
      border: 1px solid var(--white);
      border-radius: 999px;
    }

    /* 首页 */
    .hero {
      min-height: 100vh;
      background:
        radial-gradient(circle at 50% 40%, rgba(255,255,255,0.16), transparent 26%),
        linear-gradient(135deg, #090909 0%, #171717 48%, #050505 100%);
      color: var(--white);
      display: flex;
      align-items: center;
      padding-top: 76px;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 56px 56px;
      opacity: 0.28;
      pointer-events: none;
    }

    .hero-inner {
      width: min(1200px, 92%);
      margin: 0 auto;
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 44px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-copy {
      padding-top: 30px;
    }

    .eyebrow {
      font-size: 12px;
      letter-spacing: 0.32em;
      color: var(--gray);
      text-transform: uppercase;
      margin-bottom: 24px;
    }

    h1 {
      font-size: clamp(48px, 8vw, 108px);
      line-height: 0.92;
      letter-spacing: -0.06em;
      font-weight: 400;
      margin-bottom: 28px;
    }

    .hero-copy p {
      max-width: 480px;
      color: #cfcfca;
      font-size: 16px;
      line-height: 1.9;
      letter-spacing: 0.03em;
      margin-bottom: 36px;
    }

    .hero-buttons {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 150px;
      height: 48px;
      border-radius: 999px;
      border: 1px solid var(--white);
      font-size: 13px;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      transition: 0.3s ease;
      cursor: pointer;
      background: transparent;
    }

    .btn.primary {
      background: var(--white);
      color: var(--black);
    }

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

    .btn.secondary {
      color: var(--white);
    }

    .btn.secondary:hover {
      background: var(--white);
      color: var(--black);
    }

    /* 3D 雨伞模型展示区 */
    .product-stage {
      position: relative;
      width: 100%;
      min-height: 620px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .model-showcase {
      width: 100%;
      height: 590px;
      position: relative;
      overflow: hidden;
      border-radius: 40px;
      border: 1px solid var(--line);
      background:
        radial-gradient(circle at center, rgba(255,255,255,0.12), transparent 42%),
        rgba(255,255,255,0.035);
      box-shadow: 0 40px 120px rgba(0,0,0,0.42);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 28px;
    }

    .model-frame {
      width: 88%;
      height: 500px;
      border: 0;
      border-radius: 28px;
      filter: grayscale(1) contrast(1.08);
      background: #111;
      position: relative;
      z-index: 2;
    }

    .model-label {
      position: absolute;
      left: 34px;
      bottom: 28px;
      color: #cfcfca;
      font-size: 12px;
      letter-spacing: 0.22em;
      text-transform: uppercase;
      z-index: 3;
    }

    .model-note {
      position: absolute;
      right: 34px;
      top: 30px;
      color: #9d9d98;
      font-size: 11px;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      z-index: 3;
    }

    /* 页面通用 */
    section {
      padding: 110px 0;
    }

    .section-inner {
      width: min(1200px, 92%);
      margin: 0 auto;
    }

    .section-title {
      font-size: clamp(34px, 5vw, 70px);
      font-weight: 400;
      letter-spacing: -0.05em;
      margin-bottom: 20px;
    }

    .section-desc {
      max-width: 650px;
      color: #666;
      line-height: 1.9;
      font-size: 15px;
      letter-spacing: 0.03em;
    }

    /* 菜单 / 产品系列 */
    .menu-section {
      background: var(--white);
      color: var(--black);
    }

    .menu-grid {
      margin-top: 60px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .menu-card {
      border: 1px solid var(--dark-line);
      padding: 34px;
      min-height: 260px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: 0.3s ease;
      background: #fff;
    }

    .menu-card:hover {
      background: var(--black);
      color: var(--white);
      transform: translateY(-8px);
    }

    .menu-card span {
      font-size: 12px;
      letter-spacing: 0.22em;
      color: var(--gray);
      text-transform: uppercase;
    }

    .menu-card h3 {
      font-size: 28px;
      font-weight: 400;
      letter-spacing: -0.03em;
    }

    .menu-card p {
      color: inherit;
      opacity: 0.72;
      line-height: 1.8;
      font-size: 14px;
    }

    /* 订购 */
    .order-section {
      background: #0a0a0a;
      color: var(--white);
    }

    .order-panel {
      margin-top: 50px;
      border: 1px solid var(--line);
      padding: 44px;
      display: grid;
      grid-template-columns: 1fr 0.8fr;
      gap: 36px;
      align-items: center;
    }

    .price {
      font-size: clamp(42px, 6vw, 78px);
      letter-spacing: -0.06em;
      font-weight: 400;
    }

    .order-panel p {
      color: #cfcfca;
      line-height: 1.9;
      margin-top: 18px;
    }

    .order-actions {
      display: grid;
      gap: 14px;
    }

    .order-input {
      height: 52px;
      background: transparent;
      border: 1px solid var(--line);
      color: var(--white);
      padding: 0 18px;
      outline: none;
      font-size: 14px;
    }

    .order-input::placeholder {
      color: #777;
    }

    .order-submit {
      width: 100%;
      border-radius: 0;
      color: var(--black);
    }

    /* 联系与售后 */
    .info-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 22px;
      margin-top: 50px;
    }

    .info-box {
      border: 1px solid var(--dark-line);
      padding: 36px;
      min-height: 220px;
      background: #fff;
    }

    .info-box h3 {
      font-size: 28px;
      font-weight: 400;
      margin-bottom: 18px;
    }

    .info-box p {
      color: #666;
      line-height: 1.9;
    }

    footer {
      background: #0a0a0a;
      color: var(--white);
      padding: 36px 0;
      border-top: 1px solid var(--line);
    }

    .footer-inner {
      width: min(1200px, 92%);
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      gap: 20px;
      color: #9d9d98;
      font-size: 12px;
      letter-spacing: 0.16em;
      text-transform: uppercase;
    }

    /* 手机端适配 */
    @media (max-width: 900px) {
      header {
        height: auto;
      }

      .navbar {
        padding: 18px 0;
        flex-direction: column;
        gap: 16px;
      }

      nav {
        flex-wrap: wrap;
        justify-content: center;
      }

      nav a {
        font-size: 11px;
        padding: 9px 12px;
      }

      .hero {
        padding-top: 132px;
      }

      .hero-inner {
        grid-template-columns: 1fr;
      }

      .product-stage {
        min-height: 520px;
      }

      .model-showcase {
        height: 500px;
      }

      .model-frame {
        height: 420px;
      }

      .menu-grid,
      .order-panel,
      .info-grid {
        grid-template-columns: 1fr;
      }

      .footer-inner {
        flex-direction: column;
      }
    }

    @media (max-width: 520px) {
      .brand {
        font-size: 22px;
      }

      .hero-copy p {
        font-size: 14px;
      }

      .model-showcase {
        height: 430px;
        border-radius: 28px;
      }

      .model-frame {
        width: 100%;
        height: 350px;
      }

      .model-label {
        left: 24px;
        bottom: 22px;
        font-size: 10px;
      }

      .model-note {
        right: 24px;
        top: 24px;
        font-size: 10px;
      }

      .menu-card,
      .order-panel,
      .info-box {
        padding: 26px;
      }
    }