:root {
      --bg: #faf7f1;
      --panel: #fffdf8;
      --panel-soft: #f4efe5;
      --text: #1f2933;
      --muted: #5f6b76;
      --line: #e4dacb;
      --accent: #c7793d;
      --accent-dark: #8f4d25;
      --green: #2f7d62;
      --blue: #355f91;
      --shadow: 0 22px 55px rgba(99, 72, 43, 0.12);
      --radius: 26px;
      --container: 1120px;
    }

    * {
      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(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(231, 184, 119, 0.26), transparent 30%),
        radial-gradient(circle at 88% 18%, rgba(104, 151, 138, 0.18), transparent 28%),
        linear-gradient(180deg, #fbf5ea 0%, #faf7f1 46%, #f7f2e9 100%);
      line-height: 1.7;
    }

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 10;
      background: rgba(250, 247, 241, 0.86);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(228, 218, 203, 0.72);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #2b2118;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      background: linear-gradient(135deg, #c7793d, #f0bd72);
      box-shadow: 0 10px 24px rgba(199, 121, 61, 0.25);
      position: relative;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      width: 12px;
      height: 18px;
      border: 2px solid #fff9ef;
      border-radius: 4px;
      left: 11px;
      top: 7px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      color: #3f4852;
      font-size: 14px;
      white-space: nowrap;
    }

    .nav-links a {
      transition: color 0.2s ease;
    }

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

    .nav-call {
      padding: 9px 16px;
      border-radius: 999px;
      background: #2f7d62;
      color: #ffffff;
      font-weight: 700;
      box-shadow: 0 10px 22px rgba(47, 125, 98, 0.18);
    }

    .hero {
      padding: 72px 0 44px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255, 253, 248, 0.78);
      color: var(--accent-dark);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--green);
      box-shadow: 0 0 0 5px rgba(47, 125, 98, 0.12);
    }

    h1 {
      margin: 0;
      max-width: 820px;
      font-size: clamp(34px, 6vw, 62px);
      line-height: 1.08;
      letter-spacing: -0.06em;
      color: #1f1a16;
    }

    .hero-desc {
      margin: 22px 0 0;
      max-width: 680px;
      color: var(--muted);
      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;
      min-height: 46px;
      padding: 0 20px;
      border-radius: 999px;
      font-weight: 800;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .btn-primary {
      background: #1f2933;
      color: #ffffff;
      box-shadow: 0 14px 28px rgba(31, 41, 51, 0.18);
    }

    .btn-secondary {
      background: rgba(255, 253, 248, 0.92);
      color: #2a3138;
      border: 1px solid var(--line);
    }

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

    .phone-panel {
      position: relative;
      border-radius: 34px;
      background: linear-gradient(145deg, #fffaf0, #f0e4d4);
      border: 1px solid rgba(228, 218, 203, 0.95);
      box-shadow: var(--shadow);
      padding: 26px;
      overflow: hidden;
      animation: panelFloat 7s ease-in-out infinite;
    }

    .phone-panel::before {
      content: "";
      position: absolute;
      inset: -80px auto auto -70px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(199, 121, 61, 0.16);
    }

    .device {
      position: relative;
      margin: 0 auto;
      width: min(260px, 82%);
      aspect-ratio: 9 / 16;
      padding: 14px;
      border-radius: 34px;
      background: #1e252c;
      box-shadow: inset 0 0 0 2px #3c4650, 0 28px 52px rgba(50, 41, 31, 0.2);
    }

    .screen {
      height: 100%;
      border-radius: 24px;
      overflow: hidden;
      background:
        linear-gradient(120deg, rgba(255, 255, 255, 0.9), transparent 32%),
        repeating-linear-gradient(0deg, rgba(199, 121, 61, 0.24) 0 2px, transparent 2px 11px),
        linear-gradient(135deg, #f9e3be, #f7f2e9 44%, #b9d7c7);
      position: relative;
    }

    .screen::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.42), transparent);
      transform: translateX(-100%);
      animation: scan 3.8s ease-in-out infinite;
    }

    .status-card {
      margin-top: 18px;
      display: grid;
      gap: 10px;
    }

    .status-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 14px;
      border-radius: 16px;
      background: rgba(255, 253, 248, 0.78);
      border: 1px solid rgba(228, 218, 203, 0.86);
      color: #35404a;
      font-size: 14px;
    }

    .status-row strong {
      color: var(--green);
      white-space: nowrap;
    }

    section {
      padding: 34px 0;
    }

    .section-head {
      max-width: 760px;
      margin-bottom: 24px;
    }

    .section-kicker {
      margin: 0 0 8px;
      color: var(--accent-dark);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 0.08em;
    }

    h2 {
      margin: 0;
      font-size: clamp(25px, 3.4vw, 38px);
      line-height: 1.2;
      letter-spacing: -0.035em;
      color: #231f1b;
    }

    .section-desc {
      margin: 12px 0 0;
      color: var(--muted);
    }

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

    .cause-card {
      background: rgba(255, 253, 248, 0.86);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: 0 16px 36px rgba(99, 72, 43, 0.08);
      transition: transform 0.22s ease, box-shadow 0.22s ease;
    }

    .cause-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 24px 48px rgba(99, 72, 43, 0.13);
    }

    .cause-card span {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 14px;
      background: #f2e2cd;
      color: var(--accent-dark);
      font-weight: 900;
      margin-bottom: 14px;
    }

    h3 {
      margin: 0 0 8px;
      font-size: 18px;
      line-height: 1.35;
      color: #25211d;
    }

    .cause-card p,
    .step p,
    .note-card p,
    .faq p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .check-band {
      border-radius: 34px;
      background:
        linear-gradient(135deg, rgba(47, 125, 98, 0.1), rgba(199, 121, 61, 0.08)),
        rgba(255, 253, 248, 0.78);
      border: 1px solid var(--line);
      padding: 28px;
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 24px;
      align-items: start;
      box-shadow: var(--shadow);
    }

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

    .check-list li {
      display: flex;
      gap: 10px;
      padding: 14px 15px;
      border-radius: 18px;
      background: rgba(255, 253, 248, 0.88);
      border: 1px solid rgba(228, 218, 203, 0.84);
      color: #3d4650;
    }

    .check-list li::before {
      content: "";
      flex: 0 0 9px;
      width: 9px;
      height: 9px;
      margin-top: 9px;
      border-radius: 50%;
      background: var(--green);
    }

    .steps {
      display: grid;
      gap: 14px;
      counter-reset: repairStep;
    }

    .step {
      counter-increment: repairStep;
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 16px;
      align-items: start;
      padding: 18px;
      border-radius: 24px;
      background: rgba(255, 253, 248, 0.84);
      border: 1px solid var(--line);
    }

    .step::before {
      content: counter(repairStep);
      display: inline-flex;
      width: 38px;
      height: 38px;
      border-radius: 15px;
      align-items: center;
      justify-content: center;
      background: #24313b;
      color: #ffffff;
      font-weight: 900;
    }

    .compare {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .note-card {
      padding: 24px;
      border-radius: var(--radius);
      background: rgba(255, 253, 248, 0.88);
      border: 1px solid var(--line);
    }

    .note-card.featured {
      background: #fff7e8;
      border-color: #dfc6a8;
    }

    .note-card ul {
      margin: 14px 0 0;
      padding-left: 20px;
      color: #4d5862;
    }

    .note-card li + li {
      margin-top: 7px;
    }

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

    .faq {
      border: 1px solid var(--line);
      border-radius: 22px;
      background: rgba(255, 253, 248, 0.84);
      overflow: hidden;
    }

    .faq button {
      width: 100%;
      border: 0;
      background: transparent;
      color: #25211d;
      padding: 18px 20px;
      text-align: left;
      font: inherit;
      font-weight: 800;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      cursor: pointer;
    }

    .faq button::after {
      content: "+";
      color: var(--accent-dark);
      font-size: 22px;
      line-height: 1;
      transition: transform 0.2s ease;
    }

    .faq.is-open button::after {
      transform: rotate(45deg);
    }

    .faq-content {
      display: none;
      padding: 0 20px 18px;
    }

    .faq.is-open .faq-content {
      display: block;
      animation: fadeIn 0.22s ease both;
    }

    .final-card {
      border-radius: 34px;
      padding: 30px;
      background:
        linear-gradient(135deg, rgba(31, 41, 51, 0.94), rgba(52, 68, 78, 0.94)),
        #24313b;
      color: #ffffff;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 20px;
      align-items: center;
      box-shadow: 0 26px 56px rgba(31, 41, 51, 0.2);
    }

    .final-card h2 {
      color: #ffffff;
    }

    .final-card p {
      margin: 10px 0 0;
      color: #d9e1e7;
    }

    .final-card .btn {
      background: #f7d49b;
      color: #2b2118;
      box-shadow: none;
      white-space: nowrap;
    }

    .site-footer {
      margin-top: 12px;
      background: #f0e8dc;
      border-top: 1px solid #ddd0bf;
      color: #2f3740;
    }

    .footer-inner {
      min-height: 86px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 22px 0;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: #364653;
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.55s ease, transform 0.55s ease;
    }

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

    @keyframes panelFloat {
      0%, 100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-8px);
      }
    }

    @keyframes scan {
      0%, 45% {
        transform: translateX(-110%);
      }
      70%, 100% {
        transform: translateX(110%);
      }
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(-4px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 860px) {
      .nav {
        min-height: auto;
        padding: 14px 0;
        align-items: flex-start;
      }

      .nav-links {
        display: none;
      }

      .hero {
        padding: 48px 0 28px;
      }

      .hero-grid,
      .check-band,
      .final-card {
        grid-template-columns: 1fr;
      }

      .cause-grid {
        grid-template-columns: 1fr;
      }

      .compare {
        grid-template-columns: 1fr;
      }

      .final-card .btn {
        width: 100%;
      }

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

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        animation: none !important;
        transition: none !important;
      }

      .reveal {
        opacity: 1;
        transform: none;
      }
    }