* {
    box-sizing: border-box;
  }
  :root, .sw-root {
    --sw-bg: #030303;
    --sw-ink: #F0F0F2;
    --sw-ink-soft: #88888A;
    --sw-accent: #FFFFFF;
    --sw-font-display: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --sw-font-body: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --grad: #FFFFFF;
  }
  
  .sw-nav {
    position: relative;
    display: flex;
    gap: 2px;
    border: 1px solid transparent;
    border-radius: 100px;
    padding: 4px;
    backdrop-filter: blur(24px);
    background:
      linear-gradient(rgba(10,10,12,0.45), rgba(10,10,12,0.45)) padding-box,
      linear-gradient(145deg, rgba(255,255,255,0.45) 0%, rgba(255,255,255,0.08) 28%, rgba(255,255,255,0.02) 55%, rgba(255,255,255,0.18) 100%) border-box;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.18), inset 0 -1px 0 rgba(0,0,0,0.25);
  }
  .sw-nav__slider {
    position: absolute;
    top: 4px;
    left: 0;
    height: calc(100% - 8px);
    border-radius: 100px;
    background: #FFF;
    pointer-events: none;
    z-index: 0;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), width 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  }
  .sw-nav__item { position: relative; z-index: 1; color: #888; font-size: 0.8rem; font-weight: 400; letter-spacing: 0.05em; padding: 8px 20px; border-radius: 100px; transition: color 0.35s ease; }
  .sw-nav__item:hover { color: #FFF; }
  .sw-nav__item.is-active { color: #000; font-weight: 500; }
  .sw-nav__item.is-active:hover { color: #000; }
  .sw-topcta { background: #FFF; color: #000; font-weight: 500; font-size: 0.8rem; letter-spacing: 0.05em; border-radius: 100px; transition: opacity 0.3s ease; }
  .sw-topcta:hover { opacity: 0.85; }
  .sw-brand__mark { width: 42px; height: 38px; border-radius: 0; background: url(../assets/logo.png) center/contain no-repeat; filter: none; opacity: 1; box-shadow: none; }
  .sw-brand__name { font-size: 0.9rem; font-weight: 500; letter-spacing: 0.08em; }
  .sw-topbar { position: fixed; top: 0; left: 0; right: 0; z-index: 50; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: clamp(14px, 2.4vw, 26px) clamp(18px, 5vw, 64px); }
  .sw-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #FFF; }
  .sw-nav { display: flex; gap: 2px; }
  .sw-nav__item { border: 0; background: transparent; cursor: pointer; font-family: inherit; }
  .sw-topcta { display: inline-block; text-decoration: none; padding: 10px 22px; white-space: nowrap; }

  #product { position: relative; z-index: 10; height: 100vh; height: 100svh; background: #030303; overflow: hidden; }
  .page { position: relative; z-index: 20; max-width: 1380px; margin: 0 auto; padding: 0 24px; font-family: var(--sw-font-body); }
  .sec { position: relative; padding: 20vh 0 10vh; isolation: isolate; }
  .sec::after { content: ""; position: absolute; z-index: -1; top: 12%; left: 0; width: 100%; height: 1px; opacity: 0; pointer-events: none; background: linear-gradient(90deg, transparent 4%, rgba(96,175,255,0.12) 30%, rgba(180,225,255,0.85) 50%, rgba(96,175,255,0.12) 70%, transparent 96%); box-shadow: 0 0 18px rgba(78,152,255,0.5), 0 26px 64px rgba(78,152,255,0.08); }
  .sec.is-scanning::after { animation: sec-tech-scan 1.7s cubic-bezier(0.25,0.8,0.2,1) both; }
  @keyframes sec-tech-scan { 0% { top: 7%; opacity: 0; } 12% { opacity: 1; } 82% { opacity: 0.75; } 100% { top: 46%; opacity: 0; } }
  .sec-head { margin-bottom: clamp(64px, 9vw, 110px); text-align: left; max-width: 800px; }
  .sec-eyebrow { display: inline-flex; align-items: center; gap: 18px; font-family: ui-monospace, Menlo, monospace; font-weight: 400; font-size: 0.72rem; letter-spacing: 0.42em; color: rgba(255,255,255,0.4); text-transform: uppercase; margin-bottom: 30px; }
  .sec-eyebrow::before { content: ""; flex: 0 0 auto; width: 42px; height: 1px; background: linear-gradient(90deg, rgba(255,255,255,0.55), transparent); }
  .sec-title { font-size: clamp(2.7rem, 5.4vw, 3.4rem); font-weight: 200; line-height: 1.3; margin: 0; letter-spacing: 0.04em; color: #FFF; }
  .sec-sub { margin: 30px 0 0; color: rgba(255,255,255,0.45); font-size: 1.05rem; font-weight: 300; line-height: 2; max-width: 62ch; letter-spacing: 0.04em; }
  
  .about-stage { position: relative; overflow: hidden; border: 1px solid rgba(120,185,255,0.1); border-radius: 4px; box-shadow: 0 32px 90px rgba(0,0,0,0.35); }
  .about-stage__img { display: block; width: 100%; height: auto; opacity: 0.55; filter: saturate(0.7) contrast(1.05); transition: opacity 0.7s ease, filter 0.7s ease, transform 1.2s cubic-bezier(0.2,0.8,0.2,1); }
  .about-stage:hover .about-stage__img { opacity: 0.72; filter: saturate(0.95) contrast(1.03); transform: scale(1.03); }
  .about-stage::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 20%, rgba(3,3,3,0.92) 100%); pointer-events: none; }
  .about-stage__copy { position: absolute; left: 0; bottom: 0; z-index: 1; padding: clamp(32px, 5vw, 64px); max-width: 640px; }
  .about-stage__copy p { margin: 0; color: rgba(255,255,255,0.62); font-size: clamp(1.05rem, 2vw, 1.25rem); font-weight: 300; line-height: 2; letter-spacing: 0.03em; }
  .about-values { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: clamp(56px, 7vw, 96px); border-top: 1px solid rgba(255,255,255,0.08); counter-reset: about; }
  .about-value { padding: clamp(36px, 4vw, 56px) clamp(20px, 3vw, 40px); border-right: 1px solid rgba(255,255,255,0.06); counter-increment: about; }
  .about-value:last-child { border-right: 0; }
  .about-value__num { display: block; margin-bottom: 28px; font-family: ui-monospace, Menlo, monospace; font-size: 0.72rem; letter-spacing: 0.28em; color: rgba(255,255,255,0.32); }
  .about-value__num::before { content: "0" counter(about); }
  .about-value h3 { margin: 0 0 18px; font-size: clamp(1.3rem, 2.2vw, 1.7rem); font-weight: 200; color: #FFF; letter-spacing: 0.1em; }
  .about-value p { margin: 0; color: rgba(255,255,255,0.42); font-size: 0.95rem; font-weight: 300; line-height: 2; letter-spacing: 0.02em; max-width: 28ch; }
  @media (max-width: 860px) {
    .about-values { grid-template-columns: 1fr; border-top: 0; }
    .about-value { border-right: 0; border-top: 1px solid rgba(255,255,255,0.08); padding-left: 0; padding-right: 0; }
  }

  .app-layout { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(40px, 6vw, 100px); align-items: center; }
  .app-copy h3 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 200; line-height: 1.4; letter-spacing: 0.04em; color: #FFF; }
  .app-copy p { margin: 24px 0 0; color: rgba(255,255,255,0.45); font-size: 1rem; font-weight: 300; line-height: 2; letter-spacing: 0.03em; max-width: 36ch; }
  .app-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }
  .app-qr { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .app-qr__item { position: relative; overflow: hidden; display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 28px; border: 1px solid rgba(111,178,255,0.08); border-top-color: rgba(255,255,255,0.16); background: linear-gradient(180deg, rgba(255,255,255,0.035), rgba(60,130,220,0.012)); transition: background 0.35s ease, border-color 0.35s ease, transform 0.35s ease; }
  .app-qr__item:hover { background: linear-gradient(180deg, rgba(255,255,255,0.055), transparent); }
  .app-qr__item:hover { border-color: rgba(120,190,255,0.25); transform: translateY(-4px); }
  .app-qr__item > * { position: relative; z-index: 1; }
  .app-qr__item .qr-img { background: #FFF; border-radius: 8px; padding: 12px; display: inline-block; }
  .app-qr__item img { width: 132px; height: 132px; display: block;text-align: center; }
  .app-qr__item strong { display: block; color: #FFF; font-size: 1rem; font-weight: 300; letter-spacing: 0.1em; text-align: center;}
  .app-qr__item span { display: block; margin-top: 8px; color: rgba(255,255,255,0.38); font-size: 0.78rem; font-weight: 300; letter-spacing: 0.12em; }
  @media (max-width: 900px) {
    .app-layout { grid-template-columns: 1fr; gap: 48px; }
    .app-qr { max-width: 480px; }
  }
  @media (max-width: 520px) {
    .app-qr { grid-template-columns: 1fr; }
  }

  .btn { display: inline-block; text-decoration: none; font-weight: 400; font-size: 0.85rem; letter-spacing: 0.15em; padding: 16px 36px; border-radius: 50px; transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease; text-transform: uppercase; }
  .btn-glass {
    color: #FFF;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-top-color: rgba(255, 255, 255, 0.24);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  }
  .btn-glass:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), 0 10px 28px -14px rgba(0, 0, 0, 0.55);
    transform: translateY(-1px);
  }

  .sec-head--contact { max-width: none; }
  .sec-head__row { display: flex; align-items: center; justify-content: space-between; gap: 24px 40px; flex-wrap: wrap; }
  .sec-head--contact .sec-sub { max-width: 62ch; }

  .contact-rail { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid rgba(255,255,255,0.08); counter-reset: coop; }
  .contact-item { padding: clamp(36px, 4vw, 56px) clamp(18px, 2.5vw, 36px); border-right: 1px solid rgba(255,255,255,0.06); counter-increment: coop; transition: background 0.35s ease; }
  .contact-item:last-child { border-right: 0; }
  .contact-item:hover { background: rgba(255,255,255,0.02); }
  .contact-item__num { display: block; margin-bottom: 28px; font-family: ui-monospace, Menlo, monospace; font-size: 0.72rem; letter-spacing: 0.28em; color: rgba(255,255,255,0.32); }
  .contact-item__num::before { content: "0" counter(coop); }
  .contact-item h3 { margin: 0 0 16px; font-size: clamp(1.15rem, 1.8vw, 1.4rem); font-weight: 200; color: #FFF; letter-spacing: 0.08em; }
  .contact-item p { margin: 0; color: rgba(255,255,255,0.42); font-weight: 300; font-size: 0.92rem; line-height: 1.95; letter-spacing: 0.02em; max-width: 24ch; }
  .contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 0; flex-shrink: 0; }
  @media (max-width: 960px) {
    .contact-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .contact-item:nth-child(2) { border-right: 0; }
    .contact-item:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,0.06); }
  }
  @media (max-width: 560px) {
    .contact-rail { grid-template-columns: 1fr; }
    .contact-item { border-right: 0; border-top: 1px solid rgba(255,255,255,0.06); padding-left: 0; padding-right: 0; }
    .contact-item:first-child { border-top: 0; }
    .contact-actions { width: 100%; }
    .contact-actions .btn { flex: 1 1 auto; text-align: center; }
  }

  footer {
    width: 100vw;
    max-width: 100vw;
    margin: 20vh 0 0;
    margin-left: calc(50% - 50vw);
    padding: 100px clamp(24px, 5vw, 72px);
    border-top: 1px solid rgba(255,255,255,0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    color: rgba(255,255,255,0.25);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    background: linear-gradient(180deg, rgba(255,255,255,0.01), transparent);
    box-sizing: border-box;
  }
  footer img { width: 56px; height: 56px; object-fit: contain; border-radius: 0; filter: none; opacity: 0.6; }
  footer .fn { color: rgba(255,255,255,0.45); font-weight: 300; letter-spacing: 0.3em; margin-top: 16px; }

  body.loading { overflow: hidden; }
  #loader { position: fixed; inset: 0; z-index: 100; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0; background: #030303; transition: opacity 0.8s ease, filter 0.8s ease; }
  #loader.out { opacity: 0; filter: blur(10px); pointer-events: none; }
  .ld-logo { width: 82px; height: 76px; object-fit: contain; filter: none; opacity: 0.82; animation: ld-float 3s ease-in-out infinite alternate; }
  @keyframes ld-float { from { transform: translateY(4px); opacity: 0.5; } to { transform: translateY(-4px); opacity: 0.8; } }
  .ld-name { max-width: min(82vw, 760px); margin-top: 32px; font-weight: 400; font-size: clamp(1rem, 2.4vw, 1.35rem); line-height: 1.5; text-align: center; letter-spacing: 0.08em; color: #FFF; }
  .ld-tag { margin-top: 12px; font-weight: 300; font-size: clamp(0.7rem, 1.5vw, 0.82rem); line-height: 1.7; text-align: center; letter-spacing: 0.16em; color: #777; }
  .ld-bar { margin-top: 48px; width: 140px; height: 1px; background: rgba(255,255,255,0.08); position: relative; }
  .ld-bar span { display: block; height: 100%; width: 0%; background: #FFF; transition: width 0.3s ease; }
  .ld-pct { margin-top: 24px; font-family: "Helvetica Neue", Helvetica, sans-serif; font-weight: 300; font-size: 0.7rem; letter-spacing: 0.2em; color: #555; }

  body.pre-enter .sw-topbar { opacity: 0 !important; transform: translateY(-16px); }
  body.enter .sw-topbar { opacity: 1; transform: none; transition: opacity 1s ease 0.3s, transform 1s cubic-bezier(0.2,0.8,0.2,1) 0.3s; }

  @media (prefers-reduced-motion: reduce) { .ld-logo, .ld-bar span, .sec::after { animation: none !important; } body.pre-enter .sw-topbar { opacity: 1 !important; transform: none !important; } }
  
  #fx { position: fixed; inset: 0; z-index: 15; pointer-events: none; mix-blend-mode: screen; opacity: 0.6; }
  #bg-fx { position: fixed; inset: 0; z-index: 10; pointer-events: none; mix-blend-mode: screen; opacity: 0; }
  @media (hover:none) and (pointer:coarse) { #fx, #bg-fx { display: none; } }
  @media (prefers-reduced-motion:reduce) { #fx, #bg-fx { display: none; } }

  /* ---- Custom Scrollbar & Cursor ---- */
  ::-webkit-scrollbar { width: 5px; height: 5px; }
  ::-webkit-scrollbar-track { background: #030303; }
  ::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.2); border-radius: 10px; }
  ::-webkit-scrollbar-thumb:hover { background: rgba(96, 165, 250, 0.6); }
  ::selection { background: rgba(96, 165, 250, 0.25); color: #fff; }

  html, body {
    overflow-x: hidden;
  }
  body {
    margin: 0;
    padding: 0;
    background: var(--sw-bg);
    cursor: url("data:image/svg+xml;charset=utf-8,%3Csvg width='24' height='24' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='12' cy='12' r='3' fill='%23FFF'/%3E%3Ccircle cx='12' cy='12' r='10' fill='none' stroke='rgba(255,255,255,0.2)' stroke-width='1'/%3E%3C/svg%3E") 12 12, auto;
  }
  a, button, .sw-nav__item, [role="button"] {
    cursor: url("data:image/svg+xml;charset=utf-8,%3Csvg width='32' height='32' viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='16' cy='16' r='4' fill='%2360a5fa'/%3E%3Ccircle cx='16' cy='16' r='14' fill='none' stroke='%2360a5fa' stroke-width='1' stroke-dasharray='4 3'/%3E%3C/svg%3E") 16 16, pointer !important;
  }