:root {
      --ink: #161a1d;
      --ink-soft: #384047;
      --paper: #f7f8f5;
      --white: #ffffff;
      --teal: #0f8f8c;
      --teal-dark: #0b5f61;
      --coral: #d85f49;
      --amber: #f0b44c;
      --line: rgba(22, 26, 29, 0.13);
      --shadow: 0 18px 40px rgba(20, 28, 34, 0.14);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
    }

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

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

    button,
    input,
    select,
    textarea {
      font: inherit;
    }

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 20;
      background: rgba(247, 248, 245, 0.92);
      border-bottom: 1px solid rgba(255, 255, 255, 0.35);
      backdrop-filter: blur(18px);
    }

    .nav {
      width: min(1180px, calc(100% - 36px));
      min-height: 72px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      white-space: nowrap;
      min-width: 0;
    }

    .brand-mark {
      width: 44px;
      height: 44px;
      flex: 0 0 44px;
      border-radius: 10px;
      box-shadow: 0 12px 24px rgba(15, 95, 97, 0.18);
    }

    .brand-word {
      min-width: 0;
      display: block;
      line-height: 1;
    }

    .brand-name {
      overflow: hidden;
      color: var(--ink);
      font-size: 18px;
      font-weight: 900;
      text-overflow: ellipsis;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 24px;
      color: var(--ink-soft);
      font-size: 15px;
    }

    .nav-links a {
      padding: 8px 0;
      border-bottom: 2px solid transparent;
    }

    .nav-links a:hover {
      color: var(--teal-dark);
      border-color: var(--teal);
    }

    .nav-cta,
    .btn {
      min-height: 44px;
      border: 0;
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 18px;
      color: var(--white);
      background: var(--ink);
      cursor: pointer;
      transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
      white-space: nowrap;
    }

    .nav-cta:hover,
    .btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 12px 24px rgba(22, 26, 29, 0.18);
    }

    .menu-toggle {
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 8px;
      display: none;
      align-items: center;
      justify-content: center;
      background: var(--white);
      cursor: pointer;
    }

    .menu-toggle span,
    .menu-toggle span::before,
    .menu-toggle span::after {
      width: 18px;
      height: 2px;
      display: block;
      content: "";
      background: var(--ink);
      transition: transform 160ms ease;
    }

    .menu-toggle span::before {
      transform: translateY(-6px);
    }

    .menu-toggle span::after {
      transform: translateY(4px);
    }

    .hero {
      min-height: 86vh;
      padding: 132px 0 54px;
      display: grid;
      align-items: end;
      position: relative;
      overflow: hidden;
      color: var(--white);
      background:
        linear-gradient(90deg, rgba(12, 18, 20, 0.86), rgba(12, 18, 20, 0.48) 48%, rgba(12, 18, 20, 0.16)),
        url("../assets/images/hero-car-wash.png") center / cover no-repeat;
    }

    .hero::after {
      position: absolute;
      inset: auto 0 0;
      height: 32%;
      content: "";
      background: linear-gradient(180deg, rgba(247, 248, 245, 0), var(--paper));
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      width: min(1180px, calc(100% - 36px));
      margin: 0 auto;
      display: grid;
      gap: 32px;
    }

    .eyebrow {
      margin: 0 0 16px;
      color: #9be1dc;
      font-size: 14px;
      font-weight: 800;
      text-transform: uppercase;
    }

    .hero h1 {
      max-width: 660px;
      margin: 0;
      font-size: 54px;
      line-height: 1.08;
      letter-spacing: 0;
    }

    .hero p {
      max-width: 590px;
      margin: 20px 0 0;
      color: rgba(255, 255, 255, 0.84);
      font-size: 18px;
    }

    .hero-actions {
      margin-top: 30px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .btn-primary {
      background: var(--coral);
    }

    .btn-secondary {
      color: var(--white);
      background: rgba(255, 255, 255, 0.16);
      border: 1px solid rgba(255, 255, 255, 0.38);
    }

    .hero-proof {
      width: min(880px, 100%);
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 1px;
      border: 1px solid rgba(255, 255, 255, 0.18);
      background: rgba(255, 255, 255, 0.18);
      backdrop-filter: blur(14px);
    }

    .proof-item {
      min-height: 92px;
      padding: 18px;
      background: rgba(14, 21, 24, 0.44);
    }

    .proof-item strong {
      display: block;
      color: var(--white);
      font-size: 24px;
      line-height: 1.2;
    }

    .proof-item span {
      display: block;
      margin-top: 6px;
      color: rgba(255, 255, 255, 0.76);
      font-size: 14px;
    }

    .section {
      padding: 86px 0;
    }

    .section.alt {
      background: var(--white);
    }

    .wrap {
      width: min(1180px, calc(100% - 36px));
      margin: 0 auto;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 34px;
    }

    .section-head h2 {
      max-width: 620px;
      margin: 0;
      font-size: 36px;
      line-height: 1.18;
      letter-spacing: 0;
    }

    .section-head p {
      max-width: 440px;
      margin: 0;
      color: var(--ink-soft);
    }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
    }

    .service-card,
    .price-card,
    .booking-panel,
    .review-card {
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--white);
      box-shadow: 0 10px 24px rgba(22, 26, 29, 0.06);
    }

    .service-card {
      min-height: 258px;
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      overflow: hidden;
      position: relative;
    }

    .service-card::before {
      width: 54px;
      height: 6px;
      border-radius: 8px;
      content: "";
      background: var(--accent);
    }

    .service-card h3,
    .price-card h3 {
      margin: 20px 0 10px;
      font-size: 21px;
      line-height: 1.25;
    }

    .service-card p,
    .price-card p,
    .review-card p {
      margin: 0;
      color: var(--ink-soft);
      font-size: 15px;
    }

    .service-meta {
      margin-top: 22px;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: var(--teal-dark);
      font-weight: 800;
      font-size: 14px;
    }

    .pricing-layout {
      display: grid;
      grid-template-columns: 0.85fr 1.15fr;
      gap: 18px;
      align-items: start;
    }

    .price-menu {
      display: grid;
      gap: 10px;
    }

    .package-tab {
      width: 100%;
      min-height: 64px;
      border: 1px solid var(--line);
      border-radius: 8px;
      padding: 12px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      color: var(--ink);
      background: var(--white);
      cursor: pointer;
      text-align: left;
    }

    .package-tab span {
      display: block;
      color: var(--ink-soft);
      font-size: 13px;
    }

    .package-tab strong {
      white-space: nowrap;
    }

    .package-tab.active {
      color: var(--white);
      background: var(--teal-dark);
      border-color: var(--teal-dark);
    }

    .package-tab.active span {
      color: rgba(255, 255, 255, 0.74);
    }

    .price-card {
      min-height: 362px;
      padding: 30px;
    }

    .price-top {
      display: flex;
      align-items: start;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 24px;
    }

    .price-value {
      color: var(--coral);
      font-size: 42px;
      font-weight: 900;
      line-height: 1;
      white-space: nowrap;
    }

    .price-value small {
      color: var(--ink-soft);
      font-size: 15px;
      font-weight: 700;
    }

    .feature-list {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      padding: 0;
      margin: 0 0 28px;
      list-style: none;
    }

    .feature-list li {
      min-height: 46px;
      padding: 11px 12px;
      border-left: 4px solid var(--amber);
      background: #fbf4e6;
      color: var(--ink-soft);
      font-size: 14px;
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      border-top: 1px solid var(--line);
      border-left: 1px solid var(--line);
    }

    .process-step {
      min-height: 230px;
      padding: 24px;
      border-right: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      background: var(--paper);
    }

    .step-no {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 8px;
      color: var(--white);
      background: var(--ink);
      font-weight: 900;
    }

    .process-step h3 {
      margin: 24px 0 10px;
      font-size: 20px;
    }

    .process-step p {
      margin: 0;
      color: var(--ink-soft);
      font-size: 15px;
    }

    .booking-layout {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 28px;
      align-items: stretch;
    }

    .booking-copy {
      padding: 4px 0;
    }

    .booking-copy h2 {
      margin: 0 0 16px;
      font-size: 38px;
      line-height: 1.18;
    }

    .booking-copy p {
      margin: 0 0 24px;
      color: var(--ink-soft);
    }

    .contact-strip {
      display: grid;
      gap: 12px;
      color: var(--ink-soft);
    }

    .contact-strip strong {
      color: var(--ink);
    }

    .review-card {
      margin-top: 28px;
      padding: 22px;
      background: #fff8ee;
    }

    .review-card strong {
      display: block;
      margin-bottom: 8px;
    }

    .booking-panel {
      padding: 24px;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .field {
      display: grid;
      gap: 7px;
    }

    .field.full {
      grid-column: 1 / -1;
    }

    label {
      color: var(--ink-soft);
      font-size: 14px;
      font-weight: 800;
    }

    input,
    select,
    textarea {
      width: 100%;
      min-height: 48px;
      border: 1px solid var(--line);
      border-radius: 8px;
      padding: 11px 12px;
      color: var(--ink);
      background: var(--paper);
      outline: none;
    }

    textarea {
      min-height: 92px;
      resize: vertical;
    }

    input:focus,
    select:focus,
    textarea:focus {
      border-color: var(--teal);
      box-shadow: 0 0 0 4px rgba(15, 143, 140, 0.12);
    }

    .submit-row {
      margin-top: 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .submit-row small {
      color: var(--ink-soft);
    }

    .faq-list {
      display: grid;
      gap: 10px;
    }

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 8px;
      background: var(--white);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      border: 0;
      padding: 16px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      color: var(--ink);
      background: transparent;
      cursor: pointer;
      text-align: left;
      font-weight: 800;
    }

    .faq-question::after {
      width: 24px;
      height: 24px;
      flex: 0 0 24px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--white);
      background: var(--teal);
      content: "+";
      line-height: 1;
    }

    .faq-item.open .faq-question::after {
      content: "-";
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--ink-soft);
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .site-footer {
      padding: 34px 0;
      color: rgba(255, 255, 255, 0.72);
      background: var(--ink);
    }

    .footer-inner {
      width: min(1180px, calc(100% - 36px));
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
    }

    .footer-inner strong {
      color: var(--white);
    }

    @media (max-width: 980px) {
      .nav-links {
        position: absolute;
        top: 72px;
        left: 18px;
        right: 18px;
        display: none;
        padding: 14px;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: var(--white);
        box-shadow: var(--shadow);
      }

      .nav-links.open {
        display: grid;
        gap: 4px;
      }

      .nav-cta {
        display: none;
      }

      .menu-toggle {
        display: flex;
      }

      .hero {
        min-height: 84vh;
        background:
          linear-gradient(90deg, rgba(12, 18, 20, 0.86), rgba(12, 18, 20, 0.44)),
          url("../assets/images/hero-car-wash.png") center / cover no-repeat;
      }

      .hero h1 {
        font-size: 42px;
      }

      .services-grid,
      .process-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .pricing-layout,
      .booking-layout {
        grid-template-columns: 1fr;
      }

      .section-head {
        align-items: start;
        flex-direction: column;
      }
    }

    @media (max-width: 680px) {
      .nav {
        width: min(100% - 28px, 1180px);
      }

      .brand-name {
        max-width: 148px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .hero {
        min-height: 88vh;
        padding-top: 118px;
      }

      .hero-inner,
      .wrap,
      .footer-inner {
        width: min(100% - 28px, 1180px);
      }

      .hero h1 {
        font-size: 34px;
      }

      .hero p {
        font-size: 16px;
      }

      .hero-proof,
      .services-grid,
      .process-grid,
      .feature-list,
      .form-grid {
        grid-template-columns: 1fr;
      }

      .section {
        padding: 64px 0;
      }

      .section-head h2,
      .booking-copy h2 {
        font-size: 30px;
      }

      .price-top,
      .submit-row {
        align-items: start;
        flex-direction: column;
      }

      .price-value {
        font-size: 36px;
      }

      .btn {
        width: 100%;
      }
    }