:root {
      --ink: #121212;
      --cream: #FFF8E7;
      --hot: #FF4D6D;
      --electric: #00E5FF;
      --acid: #D4FF00;
      --grape: #7B2FF2;
      --orange: #FF8A00;
      --soft: #F2EDE4;

      --maxw: 1040px;
      --pad: clamp(16px, 3vw, 32px);
      --gutter: max(var(--pad), calc((100% - var(--maxw)) / 2));

      --radius: 20px;
      --shadow: 5px 5px 0 var(--ink);
      --shadow-sm: 3px 3px 0 var(--ink);
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      background: var(--cream);
      color: var(--ink);
      line-height: 1.55;
      overflow-x: hidden;
      font-size: 15px;
    }

    .noise::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: 9999;
      pointer-events: none;
      opacity: .035;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    }

    /* ========== 导航 ========== */
    .nav {
      position: sticky;
      top: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px var(--gutter);
      background: rgba(255, 248, 231, .9);
      backdrop-filter: blur(14px);
      border-bottom: 2.5px solid var(--ink);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 900;
      font-size: 1.15rem;
      letter-spacing: -.04em;
    }

    /* logo 改为图片：SVG data URI，透明底，用 drop-shadow 保留潮玩投影 */
    .logo-mark {
      width: 34px;
      height: 34px;
      display: block;
      transform: rotate(-6deg);
      filter: drop-shadow(2.5px 2.5px 0 var(--ink));
    }

    .logo-sub {
      font-weight: 500;
      font-size: .68rem;
      opacity: .55;
      margin-left: 3px;
    }

    .nav-links {
      display: flex;
      gap: clamp(10px, 1.6vw, 20px);
      list-style: none;
      font-size: .82rem;
      font-weight: 700;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--ink);
      padding: 5px 2px;
      border-bottom: 3px solid transparent;
      transition: border-color .2s;
    }
    .nav-links a:hover { border-color: var(--hot); }

    .nav-cta {
      display: inline-block;
      background: var(--ink);
      color: var(--acid);
      text-decoration: none;
      font-weight: 800;
      font-size: .8rem;
      padding: 8px 18px;
      border-radius: 999px;
      border: 2.5px solid var(--ink);
      box-shadow: 3px 3px 0 var(--acid);
      transition: transform .15s, box-shadow .15s;
      white-space: nowrap;
    }
    .nav-cta:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--acid); }

    /* ========== Hero ========== */
    .hero {
      position: relative;
      padding: clamp(36px, 5vw, 68px) var(--gutter) clamp(32px, 4.5vw, 56px);
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: clamp(24px, 3vw, 36px);
      align-items: center;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--acid);
      border: 2.5px solid var(--ink);
      border-radius: 999px;
      padding: 4px 12px;
      font-size: .72rem;
      font-weight: 800;
      letter-spacing: .04em;
      box-shadow: var(--shadow-sm);
      margin-bottom: 16px;
    }

    .hero h1 {
      font-size: clamp(2.2rem, 4.6vw, 3.5rem);
      line-height: 1;
      letter-spacing: -.05em;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .hero h1 .highlight {
      position: relative;
      display: inline-block;
      background: var(--hot);
      color: var(--cream);
      padding: 0 8px;
      transform: rotate(-2deg);
      border: 3px solid var(--ink);
      border-radius: 6px 16px 6px 16px;
      box-shadow: var(--shadow-sm);
    }

    .hero-desc {
      font-size: clamp(.92rem, 1.2vw, 1rem);
      max-width: 460px;
      color: #3d3d3d;
      margin-bottom: 24px;
      line-height: 1.7;
    }

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

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--ink);
      color: var(--acid);
      font-weight: 800;
      font-size: .88rem;
      padding: 12px 26px;
      border-radius: 999px;
      text-decoration: none;
      border: 3px solid var(--ink);
      box-shadow: 5px 5px 0 var(--acid);
      transition: transform .15s, box-shadow .15s;
    }
    .btn-primary:hover { transform: translate(-3px, -3px); box-shadow: 8px 8px 0 var(--acid); }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 800;
      font-size: .86rem;
      color: var(--ink);
      text-decoration: none;
      padding: 10px 4px;
      border-bottom: 3px solid var(--ink);
      transition: border-color .2s;
    }
    .btn-ghost:hover { border-color: var(--hot); }

    .hero-visual {
      position: relative;
      height: 320px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .blob {
      position: absolute;
      border: 3px solid var(--ink);
      border-radius: 42% 58% 63% 37% / 41% 48% 52% 59%;
    }

    .blob-1 {
      width: 220px; height: 220px;
      background: var(--electric);
      animation: float 7s ease-in-out infinite;
      box-shadow: var(--shadow);
    }

    .blob-2 {
      width: 160px; height: 160px;
      background: var(--grape);
      animation: float 9s ease-in-out infinite reverse;
      top: 10px; right: 10px;
      box-shadow: var(--shadow);
      border-radius: 50% 50% 38% 62% / 55% 42% 58% 45%;
    }

    .blob-3 {
      width: 104px; height: 104px;
      background: var(--acid);
      bottom: 0; left: 10px;
      animation: float 5s ease-in-out infinite;
      box-shadow: var(--shadow);
      border-radius: 35% 65% 48% 52% / 60% 38% 62% 40%;
    }

    .hero-card {
      position: relative;
      z-index: 3;
      background: var(--cream);
      border: 3px solid var(--ink);
      border-radius: 16px;
      padding: 16px 18px;
      box-shadow: 6px 6px 0 var(--ink);
      transform: rotate(3deg);
      max-width: 210px;
      font-size: .8rem;
    }

    .hero-card .tag {
      display: inline-block;
      background: var(--orange);
      border: 2px solid var(--ink);
      border-radius: 999px;
      font-size: .64rem;
      font-weight: 800;
      padding: 2px 8px;
      margin-bottom: 8px;
    }

    .hero-card p {
      font-size: .78rem;
      font-weight: 700;
      line-height: 1.5;
    }

    @keyframes float {
      0%, 100% { transform: translate(0, 0) rotate(0deg); }
      50% { transform: translate(6px, -12px) rotate(4deg); }
    }

    /* ========== 通用 Section ========== */
    .section {
      padding: clamp(36px, 4.5vw, 64px) var(--gutter);
    }

    .section-header {
      margin-bottom: clamp(22px, 2.6vw, 34px);
      max-width: 640px;
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: .7rem;
      font-weight: 800;
      letter-spacing: .08em;
      text-transform: uppercase;
      background: var(--ink);
      color: var(--acid);
      padding: 3px 11px;
      border-radius: 999px;
      margin-bottom: 10px;
    }

    .section-header h2 {
      font-size: clamp(1.55rem, 2.9vw, 2.25rem);
      letter-spacing: -.04em;
      line-height: 1.12;
      font-weight: 900;
    }

    .section-header h2 .mark {
      background: var(--electric);
      padding: 0 6px;
      border: 2.5px solid var(--ink);
      border-radius: 5px;
      display: inline-block;
      transform: rotate(-1deg);
    }

    .section-header p {
      margin-top: 10px;
      font-size: .9rem;
      color: #4a4a4a;
      max-width: 560px;
      line-height: 1.7;
    }

    /* ========== 介绍 ========== */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .intro-card {
      background: var(--cream);
      border: 3px solid var(--ink);
      border-radius: var(--radius);
      padding: 20px 20px;
      box-shadow: var(--shadow);
    }

    .intro-card.wide { grid-column: span 2; }

    .intro-card .index {
      font-size: 2.6rem;
      font-weight: 900;
      letter-spacing: -.06em;
      line-height: 1;
      color: var(--hot);
      margin-bottom: 8px;
    }

    .intro-card h3 {
      font-size: 1.02rem;
      font-weight: 900;
      letter-spacing: -.02em;
      margin-bottom: 6px;
    }

    .intro-card p {
      font-size: .86rem;
      color: #4a4a4a;
      line-height: 1.68;
    }

    .quote-strip {
      margin-top: 18px;
      background: var(--ink);
      color: var(--cream);
      border-radius: var(--radius);
      padding: 18px 22px;
      display: flex;
      align-items: center;
      gap: 14px;
      border: 3px solid var(--ink);
      box-shadow: var(--shadow);
    }

    .quote-strip .quote-mark {
      font-size: 2.2rem;
      line-height: 1;
      color: var(--acid);
      font-weight: 900;
      flex-shrink: 0;
    }

    .quote-strip p {
      font-size: .92rem;
      font-weight: 700;
      line-height: 1.6;
    }

    .quote-strip span { color: var(--acid); }

    /* ========== 核心功能 ========== */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
    }

    .feature-card {
      background: var(--cream);
      border: 3px solid var(--ink);
      border-radius: var(--radius);
      padding: 20px 18px;
      box-shadow: var(--shadow);
      position: relative;
      transition: transform .2s;
    }

    .feature-card:hover { transform: translateY(-4px); }

    .feature-icon {
      width: 42px;
      height: 42px;
      border-radius: 13px;
      border: 2.5px solid var(--ink);
      display: grid;
      place-items: center;
      font-size: 1.2rem;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }

    .f1 .feature-icon { background: var(--electric); }
    .f2 .feature-icon { background: var(--acid); }
    .f3 .feature-icon { background: var(--hot); }
    .f4 .feature-icon { background: var(--orange); }
    .f5 .feature-icon { background: var(--grape); }
    .f6 .feature-icon { background: #FFD6E0; }

    .feature-card h3 {
      font-size: .95rem;
      font-weight: 900;
      letter-spacing: -.02em;
      margin-bottom: 6px;
    }

    .feature-card p {
      font-size: .82rem;
      color: #4f4f4f;
      line-height: 1.62;
    }

    .feature-card .stat {
      display: inline-block;
      margin-top: 12px;
      font-size: .68rem;
      font-weight: 800;
      background: var(--soft);
      border: 2px solid var(--ink);
      border-radius: 999px;
      padding: 3px 10px;
    }

    /* ========== 选择理由 ========== */
    .why-wrap {
      background: var(--ink);
      border-radius: 26px;
      padding: clamp(24px, 3.5vw, 42px);
      border: 3px solid var(--ink);
      position: relative;
      overflow: hidden;
    }

    .why-wrap::after {
      content: "";
      position: absolute;
      width: 260px; height: 260px;
      border-radius: 50%;
      background: var(--grape);
      opacity: .35;
      filter: blur(70px);
      bottom: -100px; right: -40px;
      pointer-events: none;
    }

    .why-wrap .section-label { background: var(--acid); color: var(--ink); }
    .why-wrap h2 { color: var(--cream); }
    .why-wrap h2 .mark { background: var(--hot); color: var(--cream); border-color: var(--cream); }
    .why-wrap .section-header p { color: #c9c2b6; }

    .why-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
      position: relative;
      z-index: 2;
    }

    .why-item {
      background: rgba(255, 248, 231, .07);
      border: 2px solid rgba(255, 248, 231, .18);
      border-radius: 14px;
      padding: 14px 16px;
      color: var(--cream);
      display: flex;
      gap: 10px;
      align-items: flex-start;
      transition: background .2s, border-color .2s;
    }

    .why-item:hover {
      background: rgba(255, 248, 231, .12);
      border-color: var(--acid);
    }

    .why-item .num {
      font-size: 1.05rem;
      font-weight: 900;
      color: var(--acid);
      line-height: 1.2;
      flex-shrink: 0;
      letter-spacing: -.03em;
    }

    /* 行距已减半：原 1.6 → 1.3 */
    .why-item h3 {
      font-size: .9rem;
      font-weight: 900;
      margin-bottom: 2px;
      line-height: 1.3;
    }

    .why-item p {
      font-size: .78rem;
      color: #b8b0a3;
      line-height: 1.3;
    }

    /* ========== 应用场景 ========== */
    .scenes-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .scene-card {
      background: var(--cream);
      border: 3px solid var(--ink);
      border-radius: var(--radius);
      padding: 16px 18px;
      box-shadow: var(--shadow);
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }

    .scene-emoji {
      font-size: 1.5rem;
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      border: 2.5px solid var(--ink);
      flex-shrink: 0;
      box-shadow: var(--shadow-sm);
    }

    .s1 .scene-emoji { background: var(--electric); }
    .s2 .scene-emoji { background: var(--acid); }
    .s3 .scene-emoji { background: var(--hot); }
    .s4 .scene-emoji { background: var(--orange); }

    /* 行距已减半：原 1.62 → 1.3 */
    .scene-card h3 {
      font-size: .92rem;
      font-weight: 900;
      margin-bottom: 2px;
      line-height: 1.3;
    }

    .scene-card p {
      font-size: .8rem;
      color: #4f4f4f;
      line-height: 1.3;
    }

    /* ========== 使用方法 ========== */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      counter-reset: step;
    }

    .step {
      position: relative;
      padding: 18px 20px 18px 0;
      counter-increment: step;
    }

    .step::before {
      content: counter(step, decimal-leading-zero);
      font-size: 2.6rem;
      font-weight: 900;
      letter-spacing: -.06em;
      line-height: 1;
      color: transparent;
      -webkit-text-stroke: 2px var(--ink);
      display: block;
      margin-bottom: 10px;
    }

    .step:not(:last-child)::after {
      content: "→";
      position: absolute;
      top: 20px;
      right: 6px;
      font-size: 1.2rem;
      font-weight: 900;
      color: var(--hot);
    }

    .step h3 {
      font-size: .9rem;
      font-weight: 900;
      margin-bottom: 4px;
    }

    .step p {
      font-size: .78rem;
      color: #4f4f4f;
      line-height: 1.62;
    }

    .step .micro {
      display: inline-block;
      margin-top: 8px;
      font-size: .68rem;
      font-weight: 700;
      background: var(--soft);
      border: 2px solid var(--ink);
      border-radius: 5px;
      padding: 2px 8px;
    }

    /* ========== FAQ ========== */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
      max-width: 780px;
    }

    .faq-item {
      border: 3px solid var(--ink);
      border-radius: 14px;
      background: var(--cream);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-q {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 14px 18px;
      background: none;
      border: none;
      cursor: pointer;
      font-size: .88rem;
      font-weight: 800;
      color: var(--ink);
      text-align: left;
      font-family: inherit;
    }

    .faq-q .plus {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      border: 2.5px solid var(--ink);
      display: grid;
      place-items: center;
      font-size: .9rem;
      font-weight: 900;
      flex-shrink: 0;
      background: var(--acid);
      transition: transform .25s;
    }

    .faq-item[open] .faq-q .plus { transform: rotate(45deg); background: var(--hot); color: var(--cream); }

    .faq-a {
      padding: 0 18px 16px;
      font-size: .82rem;
      color: #4f4f4f;
      line-height: 1.72;
    }

    .faq-item summary { list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }

    /* ========== 产品资讯 ========== */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .news-card {
      background: var(--cream);
      border: 3px solid var(--ink);
      border-radius: var(--radius);
      padding: 18px 16px;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: .68rem;
      font-weight: 800;
      letter-spacing: .06em;
      color: var(--hot);
      margin-bottom: 8px;
    }

    .news-card h3 {
      font-size: .88rem;
      font-weight: 900;
      line-height: 1.45;
      margin-bottom: 8px;
    }

    .news-card p {
      font-size: .78rem;
      color: #5a5a5a;
      line-height: 1.62;
      flex: 1;
    }

    .news-tag {
      display: inline-block;
      align-self: flex-start;
      margin-top: 12px;
      font-size: .65rem;
      font-weight: 800;
      background: var(--soft);
      border: 2px solid var(--ink);
      border-radius: 999px;
      padding: 2px 9px;
    }

    /* ========== Footer CTA ========== */
    .footer-cta {
      padding: clamp(36px, 5vw, 64px) var(--gutter);
      text-align: center;
      background: var(--hot);
      border-top: 3px solid var(--ink);
      border-bottom: 3px solid var(--ink);
      position: relative;
      overflow: hidden;
    }

    .footer-cta::before {
      content: "妙呀 ✦ 妙呀 ✦ 妙呀 ✦ 妙呀 ✦ 妙呀 ✦ 妙呀 ✦ 妙呀 ✦ 妙呀";
      position: absolute;
      top: 10px;
      left: 0;
      width: 200%;
      font-size: 1.7rem;
      font-weight: 900;
      color: rgba(255, 248, 231, .18);
      letter-spacing: .06em;
      white-space: nowrap;
      pointer-events: none;
    }

    .footer-cta h2 {
      font-size: clamp(1.5rem, 3.2vw, 2.3rem);
      letter-spacing: -.04em;
      color: var(--cream);
      line-height: 1.18;
      margin-bottom: 12px;
      position: relative;
    }

    .footer-cta p {
      color: rgba(255, 248, 231, .85);
      font-size: .88rem;
      max-width: 440px;
      margin: 0 auto 22px;
      position: relative;
    }

    .footer-cta .btn-primary {
      background: var(--ink);
      color: var(--acid);
      position: relative;
      border-color: var(--ink);
    }

    .footer {
      padding: 18px var(--gutter);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 10px;
      font-size: .74rem;
      color: #777;
      background: var(--cream);
    }

    .footer a { color: var(--ink); text-decoration: none; font-weight: 700; }

    /* ========== 响应式 ========== */
    @media (max-width: 900px) {
      .hero { grid-template-columns: 1fr; }
      .hero-visual { height: 260px; order: -1; }
      .blob-1 { width: 180px; height: 180px; }
      .blob-2 { width: 130px; height: 130px; }
      .blob-3 { width: 84px; height: 84px; }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .why-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .step:nth-child(2)::after { display: none; }
      .news-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 680px) {
      .nav-links { display: none; }
      .intro-grid { grid-template-columns: 1fr; }
      .intro-card.wide { grid-column: span 1; }
      .features-grid { grid-template-columns: 1fr; }
      .scenes-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr; }
      .step::after { display: none; }
      .quote-strip { flex-direction: column; align-items: flex-start; gap: 6px; }
      .hero h1 { font-size: 2rem; }
      .hero-card { display: none; }
    }

    @media (prefers-reduced-motion: reduce) {
      .blob-1, .blob-2, .blob-3 { animation: none; }
      * { scroll-behavior: auto; }
    }