:root {
      --ink: #24312f;
      --muted: #66736f;
      --light: #f8f5ee;
      --paper: #fffdf8;
      --line: #ded6c6;
      --tea: #8a6f3d;
      --bamboo: #607c62;
      --soft: #efe8dc;
      --shadow: 0 18px 48px rgba(50, 43, 31, 0.12);
      --radius: 24px;
      --container: 1140px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 8% 12%, rgba(168, 144, 91, 0.15), transparent 30%),
        radial-gradient(circle at 88% 18%, rgba(96, 124, 98, 0.14), transparent 28%),
        linear-gradient(180deg, #fbf8f0 0%, #f6efe3 48%, #fbf8f2 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(42, 49, 47, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(42, 49, 47, 0.025) 1px, transparent 1px);
      background-size: 32px 32px;
      mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 85%);
      z-index: -1;
    }

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

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

    .container {
      width: min(100% - 36px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 253, 248, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(222, 214, 198, 0.75);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: max-content;
    }

    .logo-mark {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #fffdf8;
      font-weight: 800;
      font-size: 24px;
      background:
        radial-gradient(circle at 36% 28%, rgba(255, 255, 255, 0.34), transparent 24%),
        linear-gradient(145deg, #263b35, #8a6f3d);
      box-shadow: 0 10px 24px rgba(68, 55, 32, 0.22);
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.25;
    }

    .brand-text strong {
      font-size: 17px;
      letter-spacing: 0.06em;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      font-size: 14px;
      color: #3b4643;
    }

    .nav-links a {
      position: relative;
      padding: 8px 0;
      white-space: nowrap;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 2px;
      height: 2px;
      background: var(--tea);
      transform: scaleX(0);
      transform-origin: right;
      transition: transform 0.25s ease;
    }

    .nav-links a:hover::after {
      transform: scaleX(1);
      transform-origin: left;
    }

    .nav-action {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 16px;
      border-radius: 999px;
      background: #263b35;
      color: #fffdf8;
      font-size: 14px;
      box-shadow: 0 12px 26px rgba(38, 59, 53, 0.18);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      white-space: nowrap;
    }

    .nav-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 30px rgba(38, 59, 53, 0.25);
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--paper);
      color: var(--ink);
      cursor: pointer;
    }

    .hero {
      padding: 72px 0 42px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.88fr);
      gap: 42px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 6px 12px;
      border: 1px solid rgba(138, 111, 61, 0.25);
      border-radius: 999px;
      background: rgba(255, 253, 248, 0.7);
      color: #6e5a32;
      font-size: 13px;
      margin-bottom: 18px;
    }

    .eyebrow::before {
      content: "";
      width: 18px;
      height: 1px;
      background: #8a6f3d;
    }

    h1, h2, h3 {
      margin: 0;
      color: #202c2a;
      line-height: 1.25;
    }

    h1 {
      font-size: clamp(34px, 6vw, 58px);
      letter-spacing: 0.03em;
      max-width: 680px;
    }

    .hero-desc {
      margin: 22px 0 0;
      max-width: 660px;
      color: #52615d;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 12px 20px;
      border-radius: 16px;
      font-weight: 700;
      transition: transform 0.24s ease, box-shadow 0.24s ease, background 0.24s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, #263b35, #607c62);
      color: #fffdf8;
      box-shadow: 0 14px 28px rgba(38, 59, 53, 0.2);
    }

    .btn-secondary {
      background: rgba(255, 253, 248, 0.82);
      color: #263b35;
      border: 1px solid rgba(138, 111, 61, 0.28);
    }

    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 18px 34px rgba(50, 43, 31, 0.16);
    }

    .hero-note {
      margin-top: 24px;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      max-width: 650px;
    }

    .note-item {
      padding: 12px 14px;
      border-radius: 18px;
      background: rgba(255, 253, 248, 0.72);
      border: 1px solid rgba(222, 214, 198, 0.75);
      color: #4b5a56;
      font-size: 14px;
    }

    .visual-card {
      position: relative;
      padding: 20px;
      border-radius: 34px;
      background:
        linear-gradient(145deg, rgba(255, 253, 248, 0.94), rgba(239, 232, 220, 0.68));
      border: 1px solid rgba(222, 214, 198, 0.85);
      box-shadow: var(--shadow);
      overflow: hidden;
      animation: floatIn 0.9s ease both;
    }

    .visual-card::before {
      content: "";
      position: absolute;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      right: -82px;
      top: -70px;
      background: radial-gradient(circle, rgba(96, 124, 98, 0.2), transparent 68%);
    }

    .phone-frame {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr 0.82fr;
      gap: 14px;
      align-items: stretch;
    }

    .phone-image-main,
    .phone-image-side {
      border-radius: 24px;
      overflow: hidden;
      background: #eee5d6;
      border: 1px solid rgba(222, 214, 198, 0.9);
    }

    .phone-image-main {
      aspect-ratio: 4 / 5;
    }

    .phone-image-side {
      aspect-ratio: 3 / 4;
      align-self: end;
    }

    .phone-image-main img,
    .phone-image-side img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .visual-info {
      position: relative;
      z-index: 1;
      margin-top: 16px;
      padding: 16px;
      border-radius: 22px;
      background: rgba(255, 253, 248, 0.78);
      border: 1px solid rgba(222, 214, 198, 0.78);
      display: grid;
      gap: 8px;
    }

    .visual-info strong {
      font-size: 18px;
    }

    .visual-info span {
      color: var(--muted);
      font-size: 14px;
    }

    section {
      padding: 42px 0;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 24px;
    }

    .section-kicker {
      color: var(--tea);
      font-weight: 700;
      font-size: 14px;
      letter-spacing: 0.12em;
      margin-bottom: 8px;
    }

    .section-head h2 {
      font-size: clamp(26px, 4vw, 38px);
    }

    .section-head p {
      margin: 0;
      max-width: 470px;
      color: var(--muted);
    }

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

    .service-card {
      padding: 22px;
      min-height: 170px;
      border-radius: 24px;
      background: rgba(255, 253, 248, 0.78);
      border: 1px solid rgba(222, 214, 198, 0.86);
      box-shadow: 0 12px 32px rgba(50, 43, 31, 0.07);
      transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: rgba(138, 111, 61, 0.42);
      background: rgba(255, 253, 248, 0.96);
    }

    .service-icon {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      background: #efe8dc;
      color: #6a5530;
      margin-bottom: 14px;
      font-weight: 800;
    }

    .service-card h3 {
      font-size: 18px;
      margin-bottom: 8px;
    }

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

    .solution-panel {
      border-radius: 30px;
      background:
        linear-gradient(135deg, rgba(38, 59, 53, 0.96), rgba(96, 124, 98, 0.9)),
        linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1));
      color: #fffdf8;
      padding: 30px;
      overflow: hidden;
      position: relative;
    }

    .solution-panel h2,
    .solution-panel h3 {
      color: #fffdf8;
    }

    .solution-panel::after {
      content: "";
      position: absolute;
      right: -40px;
      bottom: -60px;
      width: 260px;
      height: 260px;
      border: 1px solid rgba(255, 253, 248, 0.18);
      border-radius: 50%;
    }

    .solution-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 26px;
      align-items: start;
    }

    .solution-intro p {
      color: rgba(255, 253, 248, 0.8);
      margin: 14px 0 0;
    }

    .steps {
      display: grid;
      gap: 12px;
    }

    .step {
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      padding: 16px;
      border-radius: 20px;
      background: rgba(255, 253, 248, 0.1);
      border: 1px solid rgba(255, 253, 248, 0.16);
    }

    .step-number {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: #fffdf8;
      color: #263b35;
      font-weight: 800;
    }

    .step p {
      margin: 5px 0 0;
      color: rgba(255, 253, 248, 0.78);
      font-size: 14px;
    }

    .warranty-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
    }

    .warranty-card {
      padding: 22px;
      border-radius: 24px;
      background: rgba(255, 253, 248, 0.78);
      border: 1px solid rgba(222, 214, 198, 0.9);
    }

    .warranty-card h3 {
      font-size: 18px;
      margin-bottom: 8px;
    }

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

    .contact-wrap {
      display: grid;
      grid-template-columns: 1fr 0.92fr;
      gap: 20px;
      align-items: stretch;
    }

    .contact-card,
    .qr-card {
      border-radius: 28px;
      background: rgba(255, 253, 248, 0.84);
      border: 1px solid rgba(222, 214, 198, 0.88);
      padding: 26px;
      box-shadow: 0 14px 34px rgba(50, 43, 31, 0.08);
    }

    .info-list {
      display: grid;
      gap: 14px;
      margin-top: 18px;
    }

    .info-row {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 12px;
      padding-bottom: 13px;
      border-bottom: 1px dashed rgba(138, 111, 61, 0.28);
    }

    .info-row:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .info-row span {
      color: #8a6f3d;
      font-weight: 700;
    }

    .info-row strong,
    .info-row a {
      color: #263b35;
      font-weight: 700;
    }

    .map-link {
      display: inline-flex;
      margin-top: 18px;
      padding: 12px 16px;
      border-radius: 14px;
      background: #efe8dc;
      color: #263b35;
      font-weight: 700;
      border: 1px solid rgba(138, 111, 61, 0.25);
    }

    .qr-grid {
      display: grid;
      grid-template-columns: 170px 1fr;
      gap: 18px;
      align-items: center;
      margin-top: 16px;
    }

    .qr-box {
      padding: 10px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--line);
    }

    .qr-text p {
      margin: 6px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255, 253, 248, 0.82);
      border: 1px solid rgba(222, 214, 198, 0.9);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: transparent;
      color: var(--ink);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 800;
      font-family: inherit;
      text-align: left;
      cursor: pointer;
    }

    .faq-question span:last-child {
      width: 26px;
      height: 26px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #efe8dc;
      color: #6a5530;
      flex: 0 0 auto;
      transition: transform 0.25s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      color: var(--muted);
      font-size: 15px;
    }

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

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

    .related {
      padding-top: 18px;
    }

    .related-box {
      padding: 22px;
      border-radius: 26px;
      background: rgba(255, 253, 248, 0.7);
      border: 1px solid rgba(222, 214, 198, 0.86);
    }

    .related-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .related-links a {
      display: inline-flex;
      padding: 8px 12px;
      border-radius: 999px;
      background: rgba(239, 232, 220, 0.84);
      color: #3c4b47;
      font-size: 13px;
      border: 1px solid rgba(138, 111, 61, 0.18);
    }

    .site-footer {
      margin-top: 20px;
      background: #263b35;
      color: #f9f3e8;
      border-top: 1px solid rgba(222, 214, 198, 0.3);
    }

    .footer-inner {
      padding: 28px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .footer-inner p {
      margin: 0;
      color: rgba(249, 243, 232, 0.78);
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 14px;
    }

    .footer-links a {
      color: #f9f3e8;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }

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

    @keyframes floatIn {
      from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    @media (max-width: 960px) {
      .nav-links,
      .nav-action {
        display: none;
      }

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

      .nav.mobile-open {
        align-items: flex-start;
        padding: 14px 0;
        flex-wrap: wrap;
      }

      .nav.mobile-open .nav-links {
        order: 3;
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px 14px;
        padding-top: 10px;
      }

      .nav.mobile-open .nav-action {
        order: 4;
        display: inline-flex;
      }

      .hero-grid,
      .solution-grid,
      .contact-wrap {
        grid-template-columns: 1fr;
      }

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

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

    @media (max-width: 640px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .hero {
        padding: 46px 0 28px;
      }

      section {
        padding: 34px 0;
      }

      .hero-note,
      .services-grid,
      .warranty-grid,
      .qr-grid {
        grid-template-columns: 1fr;
      }

      .phone-frame {
        grid-template-columns: 1fr;
      }

      .phone-image-side {
        display: none;
      }

      .solution-panel,
      .contact-card,
      .qr-card {
        padding: 22px;
        border-radius: 24px;
      }

      .info-row {
        grid-template-columns: 1fr;
        gap: 3px;
      }

      .footer-inner {
        align-items: flex-start;
        flex-direction: column;
      }
    }