:root {
      --paper: #fbf7ee;
      --paper-deep: #f3eadc;
      --ink: #24313a;
      --muted: #66727b;
      --tea: #8b6f47;
      --jade: #5d7d73;
      --line: rgba(139, 111, 71, 0.18);
      --white: #ffffff;
      --shadow: 0 18px 46px rgba(78, 64, 41, 0.12);
      --radius-lg: 28px;
      --radius-md: 18px;
      --container: 1120px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 8% 8%, rgba(222, 197, 150, 0.36), transparent 28%),
        radial-gradient(circle at 92% 24%, rgba(141, 176, 161, 0.28), transparent 30%),
        linear-gradient(180deg, #fffdf8 0%, var(--paper) 45%, #f7efe3 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 253, 248, 0.86);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--line);
    }

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

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .logo-mark {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #fffdf8;
      font-size: 24px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--jade), var(--tea));
      box-shadow: 0 10px 24px rgba(93, 125, 115, 0.22);
    }

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

    .brand-text strong {
      font-size: 17px;
      letter-spacing: 0.04em;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 22px;
      font-size: 14px;
      color: #3b474e;
    }

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

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 3px;
      width: 0;
      height: 2px;
      border-radius: 2px;
      background: var(--jade);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-action {
      padding: 9px 16px;
      border-radius: 999px;
      color: #fffdf8;
      background: linear-gradient(135deg, #5d7d73, #8b6f47);
      box-shadow: 0 10px 24px rgba(93, 125, 115, 0.18);
      white-space: nowrap;
    }

    .menu-toggle {
      display: none;
      border: 1px solid var(--line);
      background: #fffaf1;
      color: var(--ink);
      border-radius: 12px;
      padding: 8px 11px;
      font-size: 18px;
      cursor: pointer;
    }

    main {
      position: relative;
    }

    .hero {
      padding: 58px 0 42px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 13px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.68);
      color: var(--tea);
      font-size: 13px;
      font-weight: 700;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--jade);
    }

    h1 {
      margin: 18px 0 16px;
      max-width: 760px;
      font-size: clamp(34px, 6vw, 56px);
      line-height: 1.12;
      letter-spacing: -0.04em;
      color: #1e2b31;
    }

    .hero-lead {
      margin: 0;
      max-width: 650px;
      color: #52616a;
      font-size: 17px;
    }

    .hero-actions {
      margin-top: 26px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 12px 20px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 700;
      transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

    .btn-primary {
      color: #fffdf8;
      background: linear-gradient(135deg, #486e64, #8b6f47);
      box-shadow: 0 16px 30px rgba(82, 102, 76, 0.24);
    }

    .btn-secondary {
      color: var(--ink);
      background: rgba(255, 255, 255, 0.72);
      border-color: var(--line);
    }

    .hero-note {
      margin-top: 18px;
      color: var(--muted);
      font-size: 14px;
    }

    .visual-card {
      position: relative;
      padding: 14px;
      border: 1px solid rgba(139, 111, 71, 0.2);
      border-radius: 34px;
      background: rgba(255, 255, 255, 0.68);
      box-shadow: var(--shadow);
      overflow: hidden;
      animation: floatIn 0.9s ease both;
    }

    .visual-card::before {
      content: "";
      position: absolute;
      width: 180px;
      height: 180px;
      right: -70px;
      top: -70px;
      border-radius: 50%;
      background: rgba(93, 125, 115, 0.16);
    }

    .image-wrap {
      position: relative;
      aspect-ratio: 4 / 3;
      border-radius: 25px;
      overflow: hidden;
      background: var(--paper-deep);
    }

    .image-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .diagnosis-strip {
      margin-top: 14px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }

    .diagnosis-strip span {
      padding: 10px 8px;
      border-radius: 16px;
      text-align: center;
      color: #334047;
      background: #fff8ed;
      border: 1px solid rgba(139, 111, 71, 0.12);
      font-size: 13px;
      font-weight: 700;
    }

    section {
      padding: 38px 0;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 24px;
      margin-bottom: 22px;
    }

    .section-head h2 {
      margin: 0;
      font-size: clamp(25px, 4vw, 36px);
      line-height: 1.25;
      letter-spacing: -0.03em;
    }

    .section-head p {
      margin: 0;
      max-width: 520px;
      color: var(--muted);
      font-size: 15px;
    }

    .about-panel {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 24px;
      align-items: stretch;
      padding: 24px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(255,255,255,0.86), rgba(255,249,238,0.78)),
        linear-gradient(90deg, rgba(93,125,115,0.08), transparent);
      border: 1px solid var(--line);
      box-shadow: 0 14px 38px rgba(92, 72, 42, 0.08);
    }

    .about-image {
      border-radius: 23px;
      overflow: hidden;
      background: #efe5d6;
      align-self: stretch;
    }

    .about-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .about-content h3 {
      margin: 0 0 10px;
      font-size: 22px;
    }

    .about-content p {
      margin: 0 0 16px;
      color: #53616a;
    }

    .info-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .info-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 11px 13px;
      border-radius: 15px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(139, 111, 71, 0.12);
    }

    .info-list li::before {
      content: "✓";
      flex: 0 0 22px;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #fffdf8;
      background: var(--jade);
      font-size: 13px;
      margin-top: 2px;
    }

    .solution-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      align-items: stretch;
    }

    .solution-card {
      padding: 22px;
      border-radius: 24px;
      background: rgba(255,255,255,0.78);
      border: 1px solid var(--line);
      box-shadow: 0 10px 28px rgba(78, 64, 41, 0.08);
      transition: transform 0.22s ease, box-shadow 0.22s ease;
    }

    .solution-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 38px rgba(78, 64, 41, 0.13);
    }

    .solution-card h3 {
      margin: 0 0 9px;
      font-size: 20px;
    }

    .solution-card p {
      margin: 0;
      color: #5a6870;
    }

    .step-box {
      grid-column: 1 / -1;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      padding: 16px;
      border-radius: 26px;
      background: linear-gradient(135deg, rgba(93,125,115,0.12), rgba(139,111,71,0.12));
      border: 1px solid rgba(139,111,71,0.16);
    }

    .step {
      padding: 16px;
      border-radius: 19px;
      background: rgba(255,255,255,0.74);
      border: 1px solid rgba(255,255,255,0.7);
    }

    .step strong {
      display: block;
      margin-bottom: 6px;
      color: var(--tea);
      font-size: 14px;
    }

    .step span {
      display: block;
      color: #39464d;
      font-weight: 700;
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 18px;
      align-items: stretch;
    }

    .gallery-main,
    .gallery-side figure {
      margin: 0;
      overflow: hidden;
      border-radius: 24px;
      border: 1px solid var(--line);
      background: #fffaf1;
      box-shadow: 0 12px 32px rgba(78, 64, 41, 0.08);
    }

    .gallery-main img,
    .gallery-side img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .gallery-main:hover img,
    .gallery-side figure:hover img {
      transform: scale(1.035);
    }

    .gallery-main {
      min-height: 320px;
    }

    .gallery-side {
      display: grid;
      gap: 18px;
    }

    .gallery-side figure {
      min-height: 150px;
    }

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

    .assurance-item {
      padding: 22px;
      border-radius: 24px;
      background: #fffdf8;
      border: 1px solid var(--line);
    }

    .assurance-item .icon {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      margin-bottom: 13px;
      color: #fffdf8;
      background: linear-gradient(135deg, var(--jade), var(--tea));
      font-weight: 800;
    }

    .assurance-item h3 {
      margin: 0 0 8px;
      font-size: 19px;
    }

    .assurance-item p {
      margin: 0;
      color: #5a6870;
    }

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

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 18px;
      background: rgba(255,255,255,0.78);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: transparent;
      color: var(--ink);
      text-align: left;
      padding: 17px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-size: 16px;
      font-weight: 800;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question b {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: #f1e7d8;
      color: var(--tea);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.28s ease;
    }

    .faq-answer p {
      margin: 0;
      padding: 0 18px 17px;
      color: #5a6870;
    }

    .faq-item.active .faq-answer {
      max-height: 180px;
    }

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

    .links-panel {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: linear-gradient(135deg, rgba(255,255,255,0.84), rgba(244,235,219,0.8));
      border: 1px solid var(--line);
    }

    .links-panel h2 {
      margin: 0 0 12px;
      font-size: 24px;
    }

    .links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px 14px;
    }

    .links-grid a {
      padding: 10px 12px;
      border-radius: 14px;
      color: #334047;
      background: rgba(255,255,255,0.7);
      border: 1px solid rgba(139,111,71,0.12);
      transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .links-grid a:hover {
      color: var(--jade);
      border-color: rgba(93,125,115,0.35);
      transform: translateX(3px);
    }

    .cta {
      padding-bottom: 36px;
    }

    .cta-card {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 26px;
      border-radius: 30px;
      background:
        linear-gradient(135deg, rgba(72,110,100,0.96), rgba(139,111,71,0.94)),
        var(--jade);
      color: #fffdf8;
      box-shadow: 0 18px 44px rgba(72, 110, 100, 0.24);
    }

    .cta-card h2 {
      margin: 0 0 6px;
      font-size: 26px;
    }

    .cta-card p {
      margin: 0;
      color: rgba(255,253,248,0.86);
    }

    .cta-card .btn {
      background: #fffdf8;
      color: #314043;
      border-color: rgba(255,255,255,0.5);
    }

    .site-footer {
      background: #f2e8d8;
      color: #2b373d;
      border-top: 1px solid rgba(139,111,71,0.18);
      padding: 24px 0;
    }

    .footer-inner {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 18px;
      align-items: center;
    }

    .footer-inner p {
      margin: 4px 0;
      color: #4f5b62;
      font-size: 14px;
    }

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

    .footer-links a {
      color: #334047;
    }

    .footer-links a:hover {
      color: var(--jade);
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

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

    @keyframes floatIn {
      from {
        opacity: 0;
        transform: translateY(18px) scale(0.98);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    @media (max-width: 860px) {
      .menu-toggle {
        display: inline-flex;
      }

      .nav {
        min-height: 66px;
      }

      .nav-links {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 14px;
        border-radius: 20px;
        background: #fffdf8;
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

      .nav-links a {
        padding: 10px 12px;
      }

      .nav-action {
        text-align: center;
      }

      .hero {
        padding-top: 38px;
      }

      .hero-grid,
      .about-panel,
      .solution-layout,
      .gallery-grid,
      .cta-card,
      .footer-inner {
        grid-template-columns: 1fr;
      }

      .section-head {
        display: block;
      }

      .section-head p {
        margin-top: 8px;
      }

      .step-box,
      .assurance,
      .links-grid {
        grid-template-columns: 1fr;
      }

      .gallery-main {
        min-height: auto;
      }

      .gallery-side figure {
        min-height: auto;
      }

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

    @media (max-width: 520px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      .brand-text span {
        display: none;
      }

      h1 {
        font-size: 34px;
      }

      section {
        padding: 30px 0;
      }

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

      .hero-actions .btn {
        width: 100%;
      }

      .about-panel,
      .links-panel,
      .cta-card {
        padding: 18px;
      }
    }