:root {
      --bg: #fff8ef;
      --bg-soft: #fff2df;
      --card: #ffffff;
      --card-warm: #fffaf3;
      --text: #2f241e;
      --muted: #755f50;
      --line: #ecd3b7;
      --brand: #b44b26;
      --brand-dark: #87371f;
      --gold: #d99135;
      --leaf: #cc6b37;
      --green: #61734b;
      --shadow: 0 18px 45px rgba(128, 66, 28, 0.13);
      --radius: 24px;
      --container: 1120px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 10%, rgba(225, 133, 61, 0.16), transparent 30%),
        radial-gradient(circle at 88% 18%, rgba(180, 75, 38, 0.12), transparent 28%),
        linear-gradient(180deg, #fff8ef 0%, #fff3e4 42%, #fffaf4 100%);
      line-height: 1.72;
      overflow-x: hidden;
    }

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 248, 239, 0.86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(236, 211, 183, 0.75);
    }

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

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      color: var(--brand-dark);
      letter-spacing: 0.02em;
      flex: 0 0 auto;
    }

    .logo-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: #ffffff;
      font-size: 24px;
      font-weight: 900;
      background: linear-gradient(135deg, #c55a2a, #8f351e);
      box-shadow: 0 10px 24px rgba(180, 75, 38, 0.28);
    }

    .brand-sub {
      display: block;
      font-size: 12px;
      color: var(--muted);
      font-weight: 600;
      margin-top: -3px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-left: auto;
    }

    .nav-links a {
      padding: 9px 12px;
      border-radius: 999px;
      font-size: 14px;
      color: #4b382e;
      transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
      white-space: nowrap;
    }

    .nav-links a:hover {
      background: #ffe5c7;
      color: var(--brand-dark);
      transform: translateY(-1px);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 40px;
      padding: 0 18px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--brand), var(--gold));
      color: #ffffff;
      font-size: 14px;
      font-weight: 800;
      box-shadow: 0 12px 26px rgba(180, 75, 38, 0.24);
      white-space: nowrap;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 30px rgba(180, 75, 38, 0.3);
    }

    .menu-btn {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #fffaf3;
      color: var(--brand-dark);
      font-size: 20px;
      cursor: pointer;
    }

    main {
      position: relative;
    }

    .hero {
      padding: 54px 0 44px;
      position: relative;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 20px 0 auto 0;
      height: 260px;
      pointer-events: none;
      background:
        radial-gradient(circle at 20% 30%, rgba(204, 107, 55, 0.14), transparent 20%),
        radial-gradient(circle at 78% 45%, rgba(217, 145, 53, 0.16), transparent 24%);
      filter: blur(4px);
    }

    .hero-grid {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
      align-items: center;
      gap: 34px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(180, 75, 38, 0.18);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.7);
      color: var(--brand-dark);
      font-size: 13px;
      font-weight: 800;
    }

    .eyebrow::before {
      content: "";
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--leaf);
      box-shadow: 0 0 0 5px rgba(204, 107, 55, 0.14);
    }

    h1 {
      margin: 18px 0 16px;
      font-size: clamp(34px, 6.2vw, 58px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: #2b1b15;
    }

    .hero-lead {
      max-width: 670px;
      margin: 0 0 24px;
      color: #5f493b;
      font-size: 17px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      margin-bottom: 24px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 20px;
      border-radius: 14px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    }

    .btn-primary {
      color: #ffffff;
      background: linear-gradient(135deg, #b44b26, #d99135);
      box-shadow: 0 14px 30px rgba(180, 75, 38, 0.24);
    }

    .btn-secondary {
      color: var(--brand-dark);
      background: #fff8ef;
      border-color: #e6c8a5;
    }

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

    .quick-line {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      max-width: 680px;
    }

    .quick-line span {
      padding: 10px 12px;
      border-radius: 15px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(236, 211, 183, 0.78);
      color: #5b4639;
      font-size: 13px;
      font-weight: 700;
    }

    .phone-showcase {
      position: relative;
      padding: 16px;
      border-radius: 32px;
      background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(255, 239, 218, 0.88));
      box-shadow: var(--shadow);
      border: 1px solid rgba(236, 211, 183, 0.85);
      overflow: hidden;
      animation: floatIn 0.9s ease both;
    }

    .phone-showcase::after {
      content: "秋季温差与长时间导航、游戏、快充叠加时，发热更明显";
      position: absolute;
      left: 20px;
      right: 20px;
      bottom: 20px;
      padding: 12px 14px;
      border-radius: 18px;
      background: rgba(255, 250, 243, 0.92);
      color: #3f2e25;
      font-size: 13px;
      font-weight: 700;
      box-shadow: 0 10px 26px rgba(77, 42, 22, 0.12);
    }

    .image-pair {
      display: grid;
      grid-template-columns: 0.92fr 1.08fr;
      gap: 12px;
      align-items: stretch;
    }

    .image-frame {
      border-radius: 24px;
      overflow: hidden;
      background: #f5e2cf;
      min-height: 340px;
    }

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

    .image-frame.small {
      margin-top: 40px;
      min-height: 260px;
    }

    section {
      padding: 40px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 18px;
      margin-bottom: 22px;
    }

    .section-kicker {
      color: var(--brand);
      font-size: 13px;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    h2 {
      margin: 5px 0 0;
      font-size: clamp(25px, 3.8vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.03em;
      color: #2b1b15;
    }

    .section-desc {
      max-width: 420px;
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .service-strip {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .strip-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(236, 211, 183, 0.85);
      box-shadow: 0 12px 28px rgba(128, 66, 28, 0.08);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .strip-card:hover,
    .solution-card:hover,
    .faq-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 36px rgba(128, 66, 28, 0.14);
    }

    .icon {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: #ffe7cc;
      color: var(--brand-dark);
      font-weight: 900;
      margin-bottom: 13px;
    }

    h3 {
      margin: 0 0 8px;
      color: #33231c;
      font-size: 18px;
      line-height: 1.35;
    }

    .strip-card p,
    .solution-card p,
    .guarantee-card p,
    .contact-card p,
    .faq-answer p {
      margin: 0;
      color: #6b5547;
      font-size: 14px;
    }

    .solution-panel {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 18px;
      align-items: start;
    }

    .warm-note {
      padding: 26px;
      border-radius: var(--radius);
      background:
        linear-gradient(145deg, rgba(180, 75, 38, 0.95), rgba(217, 145, 53, 0.9));
      color: #ffffff;
      box-shadow: var(--shadow);
    }

    .warm-note h2 {
      color: #ffffff;
      margin-bottom: 12px;
      font-size: clamp(24px, 3.2vw, 34px);
    }

    .warm-note p {
      margin: 0 0 16px;
      color: rgba(255, 255, 255, 0.92);
    }

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

    .check-list li {
      display: flex;
      gap: 9px;
      align-items: flex-start;
      font-size: 14px;
      color: inherit;
    }

    .check-list li::before {
      content: "✓";
      flex: 0 0 auto;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: rgba(255, 255, 255, 0.2);
      font-size: 13px;
      font-weight: 900;
    }

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

    .solution-card {
      padding: 22px;
      border-radius: 22px;
      background: var(--card);
      border: 1px solid rgba(236, 211, 183, 0.92);
      box-shadow: 0 10px 25px rgba(128, 66, 28, 0.08);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .solution-card strong {
      display: inline-block;
      margin-bottom: 8px;
      color: var(--brand-dark);
      font-size: 15px;
    }

    .steps {
      counter-reset: step;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }

    .step-card {
      position: relative;
      padding: 24px;
      border-radius: 24px;
      background: linear-gradient(180deg, #ffffff, #fff7eb);
      border: 1px solid rgba(236, 211, 183, 0.9);
      overflow: hidden;
    }

    .step-card::before {
      counter-increment: step;
      content: counter(step);
      position: absolute;
      right: 18px;
      top: 14px;
      color: rgba(180, 75, 38, 0.12);
      font-size: 54px;
      line-height: 1;
      font-weight: 900;
    }

    .step-card h3,
    .step-card p {
      position: relative;
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
    }

    .guarantee-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(236, 211, 183, 0.9);
    }

    .guarantee-card b {
      color: var(--brand-dark);
    }

    .contact-wrap {
      display: grid;
      grid-template-columns: 1fr 0.82fr;
      gap: 18px;
      align-items: stretch;
    }

    .contact-card {
      padding: 26px;
      border-radius: 28px;
      background: #ffffff;
      border: 1px solid rgba(236, 211, 183, 0.92);
      box-shadow: var(--shadow);
    }

    .info-list {
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 11px;
    }

    .info-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #4d3b31;
      font-size: 15px;
    }

    .info-list b {
      min-width: 76px;
      color: #2f241e;
    }

    .qr-card {
      padding: 20px;
      border-radius: 28px;
      background:
        linear-gradient(145deg, rgba(255, 249, 239, 0.96), rgba(255, 232, 200, 0.9));
      border: 1px solid rgba(236, 211, 183, 0.92);
    }

    .qr-box {
      margin-top: 14px;
      display: grid;
      grid-template-columns: 150px 1fr;
      gap: 16px;
      align-items: center;
    }

    .qr-img {
      padding: 8px;
      border-radius: 18px;
      background: #ffffff;
      border: 1px solid #edd8bf;
    }

    .map-link {
      display: inline-flex;
      margin-top: 14px;
      padding: 10px 13px;
      border-radius: 13px;
      background: #fff8ef;
      border: 1px solid #e8c9a8;
      color: #8f351e;
      font-weight: 800;
      font-size: 14px;
    }

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

    .faq-item {
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.86);
      border: 1px solid rgba(236, 211, 183, 0.92);
      overflow: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .faq-question {
      width: 100%;
      padding: 18px 20px;
      border: 0;
      background: transparent;
      color: #33231c;
      font: inherit;
      font-weight: 900;
      text-align: left;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      cursor: pointer;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question i {
      width: 26px;
      height: 26px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: #ffe7cc;
      color: var(--brand-dark);
      font-style: normal;
      transition: transform 0.25s ease;
      flex: 0 0 auto;
    }

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

    .faq-answer div {
      padding: 0 20px 18px;
    }

    .faq-item.active .faq-answer {
      max-height: 220px;
    }

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

    .links-area {
      padding: 22px;
      border-radius: 26px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(236, 211, 183, 0.9);
    }

    .links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }

    .links-grid a {
      padding: 8px 12px;
      border-radius: 999px;
      background: #fff8ef;
      border: 1px solid #e6c8a5;
      color: #65483a;
      font-size: 13px;
      transition: background 0.25s ease, color 0.25s ease;
    }

    .links-grid a:hover {
      background: #ffe1bf;
      color: var(--brand-dark);
    }

    .alt-text {
      margin-top: 14px;
      color: #806756;
      font-size: 13px;
    }

    .site-footer {
      margin-top: 8px;
      background: #3a241a;
      color: #fff4e7;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-inner {
      padding: 28px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .footer-inner p {
      margin: 0;
      color: #f3ddc7;
      font-size: 13px;
    }

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

    .footer-links a {
      color: #fff4e7;
      font-size: 13px;
    }

    .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(20px) scale(0.98);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    @media (max-width: 940px) {
      .nav-links,
      .nav-cta {
        display: none;
      }

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

      .mobile-panel {
        display: none;
        padding: 0 0 16px;
      }

      .mobile-panel.open {
        display: grid;
        gap: 8px;
      }

      .mobile-panel a {
        padding: 12px 14px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.72);
        border: 1px solid rgba(236, 211, 183, 0.82);
        color: #4b382e;
        font-weight: 700;
      }

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

      .service-strip,
      .guarantee-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

      .phone-showcase {
        max-width: 640px;
        margin: 0 auto;
      }
    }

    @media (min-width: 941px) {
      .mobile-panel {
        display: none;
      }
    }

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

      .hero {
        padding-top: 34px;
      }

      .quick-line,
      .service-strip,
      .solution-grid,
      .guarantee-grid,
      .qr-box {
        grid-template-columns: 1fr;
      }

      .section-head {
        display: block;
      }

      .section-desc {
        margin-top: 8px;
      }

      .image-pair {
        grid-template-columns: 1fr;
      }

      .image-frame,
      .image-frame.small {
        min-height: auto;
        margin-top: 0;
      }

      .phone-showcase::after {
        position: static;
        display: block;
        margin-top: 12px;
      }

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

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