:root {
      --bg: #f3f1ec;
      --bg-deep: #dedbd2;
      --panel: #ffffff;
      --panel-soft: #f8f7f3;
      --ink: #232323;
      --muted: #606060;
      --line: #c9c4b8;
      --cement: #8a877f;
      --steel: #4b5563;
      --accent: #c46f25;
      --accent-dark: #8a4818;
      --shadow: 0 18px 50px rgba(41, 38, 33, 0.12);
      --radius-lg: 28px;
      --radius-md: 18px;
      --container: 1160px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 12% 8%, rgba(196, 111, 37, 0.12), transparent 28%),
        linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(221,218,207,0.68) 42%, rgba(244,242,236,0.96) 100%),
        var(--bg);
      line-height: 1.75;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      opacity: 0.34;
      background-image:
        linear-gradient(rgba(35,35,35,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(35,35,35,0.035) 1px, transparent 1px);
      background-size: 28px 28px;
      z-index: -1;
    }

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

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

    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .section {
      padding: 54px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 5px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      color: var(--accent-dark);
      background: rgba(255, 255, 255, 0.72);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.04em;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 5px rgba(196, 111, 37, 0.14);
    }

    .section-title {
      margin: 14px 0 12px;
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.18;
      letter-spacing: -0.04em;
      color: #1d1d1b;
    }

    .section-lead {
      max-width: 760px;
      margin: 0;
      color: var(--muted);
      font-size: 16px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 30;
      background: rgba(243, 241, 236, 0.86);
      border-bottom: 1px solid rgba(105, 100, 90, 0.18);
      backdrop-filter: blur(18px);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      color: #171717;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      background: linear-gradient(145deg, #3d3d3b, #111);
      color: #fff;
      font-size: 23px;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,0.16), 0 12px 24px rgba(0,0,0,0.16);
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.2;
    }

    .brand-text small {
      color: var(--muted);
      font-size: 12px;
      font-weight: 700;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 18px;
      color: #353535;
      font-size: 14px;
      font-weight: 700;
    }

    .nav-links a {
      padding: 8px 2px;
      border-bottom: 2px solid transparent;
      transition: color .2s ease, border-color .2s ease;
    }

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

    .nav-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 16px;
      border-radius: 999px;
      background: #222;
      color: #fff;
      font-weight: 800;
      box-shadow: 0 12px 24px rgba(0,0,0,0.14);
      transition: transform .2s ease, background .2s ease;
    }

    .nav-action:hover {
      transform: translateY(-2px);
      background: var(--accent-dark);
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 13px;
      background: rgba(255,255,255,0.72);
      color: #1f1f1f;
      font-size: 20px;
      cursor: pointer;
    }

    .hero {
      padding: 48px 0 56px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.03fr) minmax(320px, 0.72fr);
      gap: 28px;
      align-items: stretch;
    }

    .hero-copy {
      position: relative;
      padding: clamp(28px, 5vw, 56px);
      border: 1px solid rgba(105,100,90,0.22);
      border-radius: var(--radius-lg);
      background:
        linear-gradient(120deg, rgba(255,255,255,0.88), rgba(247,245,239,0.84)),
        repeating-linear-gradient(90deg, rgba(31,31,31,0.04) 0, rgba(31,31,31,0.04) 1px, transparent 1px, transparent 15px);
      box-shadow: var(--shadow);
      overflow: hidden;
      animation: liftIn .7s ease both;
    }

    .hero-copy::after {
      content: "";
      position: absolute;
      right: -80px;
      bottom: -110px;
      width: 260px;
      height: 260px;
      border: 34px solid rgba(196,111,37,0.1);
      border-radius: 50%;
    }

    h1 {
      max-width: 780px;
      margin: 18px 0 16px;
      font-size: clamp(36px, 7vw, 68px);
      line-height: 1.04;
      letter-spacing: -0.065em;
      color: #181817;
    }

    .hero-copy p {
      max-width: 720px;
      margin: 0;
      color: #4c4c4c;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 12px 18px;
      border-radius: 12px;
      border: 1px solid transparent;
      font-weight: 850;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor: pointer;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), #e09a49);
      color: #1b120a;
      box-shadow: 0 16px 30px rgba(196,111,37,0.25);
    }

    .btn-secondary {
      background: rgba(255,255,255,0.82);
      color: #262626;
      border-color: var(--line);
    }

    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 24px rgba(45,41,35,0.16);
    }

    .hero-panel {
      display: grid;
      gap: 18px;
      animation: liftIn .75s ease .08s both;
    }

    .phone-card {
      padding: 16px;
      border-radius: var(--radius-lg);
      background: #ece9df;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .phone-frame {
      overflow: hidden;
      border-radius: 22px;
      background: #d6d2c8;
      aspect-ratio: 4 / 3;
      display: grid;
      place-items: center;
    }

    .phone-frame img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 10px;
    }

    .quick-card {
      padding: 22px;
      border-radius: 22px;
      background: #2f3438;
      color: #fff;
      box-shadow: 0 20px 42px rgba(23,28,33,0.2);
    }

    .quick-card h2 {
      margin: 0 0 10px;
      font-size: 22px;
      color: #fff;
    }

    .quick-card p {
      margin: 0;
      color: #e0ded8;
      font-size: 14px;
    }

    .quick-lines {
      margin-top: 16px;
      display: grid;
      gap: 10px;
    }

    .quick-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 10px 0;
      border-top: 1px solid rgba(255,255,255,0.13);
      font-size: 14px;
    }

    .quick-line strong {
      color: #fff;
    }

    .quick-line span {
      color: #f2bd7e;
      text-align: right;
    }

    .diagnosis-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      margin-top: 24px;
    }

    .strip-item {
      padding: 18px;
      border-radius: 18px;
      border: 1px solid rgba(105,100,90,0.18);
      background: rgba(255,255,255,0.68);
    }

    .strip-item strong {
      display: block;
      margin-bottom: 4px;
      color: #222;
      font-size: 18px;
    }

    .strip-item span {
      color: var(--muted);
      font-size: 13px;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 28px;
    }

    .service-card {
      position: relative;
      padding: 22px;
      border: 1px solid rgba(105,100,90,0.18);
      border-radius: 22px;
      background: rgba(255,255,255,0.78);
      box-shadow: 0 14px 32px rgba(41,38,33,0.08);
      transition: transform .22s ease, border-color .22s ease, background .22s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: rgba(196,111,37,0.48);
      background: #fff;
    }

    .service-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
      color: #202020;
    }

    .service-card p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .reason-layout {
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      gap: 24px;
      margin-top: 28px;
      align-items: start;
    }

    .reason-note {
      padding: 26px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(145deg, rgba(47,52,56,0.96), rgba(78,76,70,0.96));
      color: #fff;
      box-shadow: var(--shadow);
    }

    .reason-note h2 {
      margin: 0 0 10px;
      font-size: 26px;
      color: #fff;
    }

    .reason-note p {
      margin: 0;
      color: #ebe7dc;
    }

    .reason-list {
      display: grid;
      gap: 12px;
    }

    .reason-item {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      padding: 18px;
      border-radius: 18px;
      background: rgba(255,255,255,0.8);
      border: 1px solid rgba(105,100,90,0.18);
      box-shadow: 0 12px 28px rgba(41,38,33,0.07);
    }

    .reason-index {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      background: #e8dfd1;
      color: var(--accent-dark);
      font-weight: 900;
    }

    .reason-item h3 {
      margin: 0 0 4px;
      font-size: 18px;
    }

    .reason-item p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .process {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 28px;
      counter-reset: step;
    }

    .process-card {
      counter-increment: step;
      padding: 22px;
      border-radius: 22px;
      background: linear-gradient(180deg, #fff, #f3f1eb);
      border: 1px solid rgba(105,100,90,0.2);
      box-shadow: 0 12px 28px rgba(41,38,33,0.07);
    }

    .process-card::before {
      content: "0" counter(step);
      display: inline-flex;
      margin-bottom: 20px;
      padding: 3px 10px;
      border-radius: 999px;
      background: #333;
      color: #fff;
      font-size: 12px;
      font-weight: 800;
    }

    .process-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
    }

    .process-card p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .warranty-panel {
      margin-top: 28px;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .warranty-item {
      padding: 20px;
      border-radius: 18px;
      background: rgba(255,255,255,0.78);
      border-left: 5px solid var(--accent);
      box-shadow: 0 12px 26px rgba(41,38,33,0.07);
    }

    .warranty-item h3 {
      margin: 0 0 6px;
      font-size: 17px;
    }

    .warranty-item p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .contact-box {
      display: grid;
      grid-template-columns: 1fr 0.86fr;
      gap: 22px;
      align-items: stretch;
      margin-top: 28px;
    }

    .contact-card,
    .qr-card {
      padding: 26px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,0.82);
      border: 1px solid rgba(105,100,90,0.2);
      box-shadow: var(--shadow);
    }

    .contact-card h2,
    .qr-card h2 {
      margin: 0 0 14px;
      font-size: 25px;
    }

    .info-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .info-list li {
      padding: 14px 16px;
      border-radius: 14px;
      background: var(--panel-soft);
      color: #2b2b2b;
      border: 1px solid rgba(105,100,90,0.14);
    }

    .info-list strong {
      color: #171717;
    }

    .map-link {
      display: inline-flex;
      margin-top: 18px;
      padding: 12px 16px;
      border-radius: 12px;
      background: #ebe3d6;
      color: #7a3f15;
      font-weight: 850;
      border: 1px solid #d7c5ac;
      transition: transform .2s ease, background .2s ease;
    }

    .map-link:hover {
      transform: translateY(-2px);
      background: #f2d8b8;
    }

    .qr-wrap {
      display: grid;
      grid-template-columns: 150px 1fr;
      gap: 18px;
      align-items: center;
      padding: 16px;
      border-radius: 20px;
      background: #f5f3ec;
      border: 1px solid rgba(105,100,90,0.16);
    }

    .qr-wrap img {
      width: 150px;
      aspect-ratio: 1 / 1;
      object-fit: contain;
      border-radius: 14px;
      background: #fff;
      padding: 6px;
      border: 1px solid var(--line);
    }

    .qr-wrap p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .faq-list {
      margin-top: 28px;
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border: 1px solid rgba(105,100,90,0.2);
      border-radius: 18px;
      background: rgba(255,255,255,0.82);
      overflow: hidden;
      box-shadow: 0 10px 24px rgba(41,38,33,0.06);
    }

    .faq-question {
      width: 100%;
      padding: 18px 20px;
      border: 0;
      background: transparent;
      color: #222;
      text-align: left;
      font-size: 16px;
      font-weight: 850;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question::after {
      content: "+";
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #ede7da;
      color: var(--accent-dark);
      font-size: 20px;
      line-height: 1;
      transition: transform .2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .25s ease;
    }

    .faq-answer p {
      margin: 0;
      padding: 0 20px 18px;
      color: var(--muted);
      font-size: 14px;
    }

    .links-band {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: rgba(47,52,56,0.96);
      color: #fff;
      box-shadow: var(--shadow);
    }

    .links-band h2 {
      margin: 0 0 12px;
      font-size: 24px;
      color: #fff;
    }

    .link-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .link-cloud a {
      display: inline-flex;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(255,255,255,0.1);
      color: #f3eee5;
      border: 1px solid rgba(255,255,255,0.13);
      font-size: 13px;
      transition: background .2s ease, transform .2s ease;
    }

    .link-cloud a:hover {
      background: rgba(196,111,37,0.28);
      transform: translateY(-2px);
    }

    .site-footer {
      margin-top: 18px;
      background: #24272a;
      color: #f5f1e9;
      border-top: 1px solid rgba(255,255,255,0.1);
    }

    .footer-inner {
      padding: 28px 0;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 22px;
      align-items: center;
    }

    .footer-inner strong {
      display: block;
      color: #fff;
      font-size: 18px;
    }

    .footer-inner p {
      margin: 4px 0 0;
      color: #d7d1c6;
      font-size: 13px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 14px;
    }

    .footer-links a {
      color: #f1e9dc;
      font-size: 13px;
      font-weight: 700;
    }

    .footer-links a:hover {
      color: #f2bd7e;
    }

    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity .55s ease, transform .55s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @keyframes liftIn {
      from {
        opacity: 0;
        transform: translateY(18px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 980px) {
      .nav-links {
        position: absolute;
        top: 72px;
        left: 16px;
        right: 16px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        border: 1px solid var(--line);
        border-radius: 20px;
        background: #f8f6ef;
        box-shadow: var(--shadow);
      }

      .nav-links.open {
        display: flex;
      }

      .nav-action {
        width: 100%;
      }

      .menu-toggle {
        display: inline-grid;
        place-items: center;
      }

      .hero-grid,
      .reason-layout,
      .contact-box {
        grid-template-columns: 1fr;
      }

      .diagnosis-strip,
      .service-grid,
      .process {
        grid-template-columns: repeat(2, 1fr);
      }

      .warranty-panel {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      .section {
        padding: 38px 0;
      }

      .hero {
        padding: 28px 0 40px;
      }

      .hero-copy {
        padding: 26px 20px;
      }

      .hero-actions {
        flex-direction: column;
      }

      .btn {
        width: 100%;
      }

      .diagnosis-strip,
      .service-grid,
      .process {
        grid-template-columns: 1fr;
      }

      .qr-wrap {
        grid-template-columns: 1fr;
      }

      .qr-wrap img {
        width: 138px;
      }

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

      .footer-links {
        justify-content: flex-start;
      }
    }