:root {
  color-scheme: light;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --soft: #f5f5f7;
  --line: #d2d2d7;
  --red: #c52b25;
  --red-hover: #a7211c;
  --white: #fff;
  --container: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--white); font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.08; }
::selection { color: var(--white); background: var(--red); }
:focus-visible { outline: 3px solid var(--red); outline-offset: 4px; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: -70px; left: 16px; padding: 10px 16px; color: var(--white); background: var(--red); border-radius: 8px; }
.skip-link:focus { top: 12px; }

.utility-bar { background: var(--soft); color: #4a4a4e; font-size: .82rem; }
.utility-inner { display: flex; justify-content: center; align-items: center; gap: 14px; min-height: 41px; text-align: center; }
.utility-inner a { color: var(--red); white-space: nowrap; }
.utility-inner a:hover { text-decoration: underline; }
.utility-inner a span { font-size: 1.2em; }
.site-header { position: sticky; z-index: 30; top: 0; background: rgba(255,255,255,.86); border-bottom: 1px solid rgba(0,0,0,.07); backdrop-filter: saturate(180%) blur(18px); -webkit-backdrop-filter: saturate(180%) blur(18px); transition: box-shadow .3s ease, border-color .3s ease; }
.site-header.is-scrolled { border-color: transparent; box-shadow: 0 8px 24px rgba(29,29,31,.07); }
.header-inner { display: flex; justify-content: space-between; align-items: center; min-height: 58px; gap: 36px; }
.brand { display: inline-flex; flex-shrink: 0; align-items: center; }
.brand-mark { display: none; }
.brand-name { font-size: 1.26rem; font-weight: 800; letter-spacing: -.055em; line-height: 1; }
.brand-dot { color: var(--red); }
.primary-nav { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 34px); }
.primary-nav > a { color: #353539; font-size: .78rem; font-weight: 500; white-space: nowrap; transition: color .2s ease; }
.primary-nav > a:hover { color: var(--red); }
.primary-nav .nav-shop { padding: 9px 17px; border: 1px solid #c9c9cf; border-radius: 999px; color: var(--ink); font-weight: 600; }
.primary-nav .nav-shop:hover { border-color: var(--red); color: var(--red); }
.nav-shop span { margin-left: 3px; font-size: .95rem; }
.language-switch { display: flex; align-items: center; gap: 7px; padding-left: 2px; color: #a0a0a6; font-size: .82rem; white-space: nowrap; }
.language-switch a { color: #6e6e73; font-weight: 600; }
.language-switch a:hover { color: var(--red); }
.language-switch a[aria-current="page"] { color: var(--ink); font-weight: 800; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 10px; border: 0; background: transparent; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; border-radius: 2px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }

.eyebrow { color: var(--red); font-size: 1rem; font-weight: 650; letter-spacing: -.01em; }
.eyebrow-line { display: none; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 45px; padding: 10px 22px; border: 1px solid transparent; border-radius: 999px; font-size: .9rem; font-weight: 600; line-height: 1.3; transition: background .2s ease, color .2s ease, transform .2s ease; }
.button:hover { transform: translateY(-1px); }
.button-primary { color: var(--white); background: var(--red); }
.button-primary:hover { background: var(--red-hover); }
.text-link, .card-link { display: inline-flex; align-items: center; gap: 6px; color: var(--red); font-size: 1rem; font-weight: 500; line-height: 1.35; }
.text-link:hover, .card-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.text-link span, .card-link span { display: inline-block; font-size: 1.35em; line-height: .8; }

.hero { overflow: hidden; background: var(--soft); }
.hero-inner { display: flex; align-items: center; flex-direction: column; }
.hero-copy { max-width: 920px; padding-top: 77px; text-align: center; }
.hero h1 { margin: 13px 0 17px; font-size: clamp(3.3rem, 6.25vw, 6.1rem); font-weight: 740; line-height: .99; letter-spacing: -.057em; }
.hero-copy > p { max-width: 620px; margin-inline: auto; color: #424245; font-size: clamp(1.13rem, 1.9vw, 1.44rem); line-height: 1.35; letter-spacing: -.015em; }
.hero-actions { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 21px; margin-top: 28px; }
.hero-visual { display: flex; justify-content: center; align-items: center; width: 100%; height: clamp(320px, 41vw, 515px); margin-top: 10px; }
.hero-visual img { width: min(55%, 440px); max-height: 100%; object-fit: contain; mix-blend-mode: multiply; }

.section { padding-block: 108px; }
.section-heading { max-width: 800px; margin: 0 auto 46px; text-align: center; }
.section-heading h2, .method-intro h2, .about-copy h2, .faq-intro h2 { margin: 12px 0 0; font-size: clamp(2.65rem, 4.5vw, 4.4rem); font-weight: 720; line-height: 1.05; letter-spacing: -.055em; }
.section-heading > p { max-width: 620px; margin: 20px auto 0; color: var(--muted); font-size: 1.06rem; }
.products-section { background: var(--white); }
.product-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.product-card { display: flex; align-items: center; flex-direction: column; min-width: 0; min-height: 635px; overflow: hidden; border-radius: 20px; background: var(--soft); transition: box-shadow .35s ease; }
.product-card-secondary { background: #f9f9fb; }
.product-card-content { display: flex; align-items: center; flex-direction: column; width: 100%; padding: 49px 25px 15px; text-align: center; }
.product-card-index { color: var(--red); font-size: .91rem; font-weight: 650; }
.product-card h3 { margin: 12px 0 12px; font-size: clamp(2rem, 3.5vw, 3.35rem); font-weight: 720; line-height: 1.04; letter-spacing: -.055em; }
.product-card p { max-width: 360px; margin-bottom: 12px; color: #545459; font-size: 1rem; }
.product-card > img { width: min(68%, 355px); height: 325px; margin-top: auto; object-fit: contain; mix-blend-mode: multiply; }
.accessory-panel { display: flex; justify-content: center; align-items: center; width: 100%; height: 325px; margin-top: auto; }
.accessory-panel img { width: min(95%, 570px); max-height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.product-footnote { margin: 20px 0 0; color: var(--muted); font-size: .84rem; text-align: center; }

.compatibility-section { padding-block: 112px; background: var(--soft); }
.compatibility-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: center; gap: clamp(40px, 8vw, 110px); }
.compatibility-copy h2, .contact-inner h2 { margin: 15px 0 22px; font-size: clamp(3rem, 4.9vw, 4.9rem); font-weight: 730; line-height: 1.03; letter-spacing: -.059em; }
.compatibility-copy > p { max-width: 460px; color: #55555a; font-size: 1.13rem; line-height: 1.48; }
.compatibility-tip { display: flex; gap: 12px; max-width: 460px; margin-top: 34px; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.tip-symbol { display: grid; flex: 0 0 20px; place-items: center; height: 20px; border: 1px solid #a9a9ae; border-radius: 50%; font-size: .75rem; font-weight: 700; }
.contact-form { padding: 35px; border: 1px solid #e8e8ed; border-radius: 24px; background: var(--white); box-shadow: 0 18px 42px rgba(22,22,30,.045); }
.form-heading { display: flex; justify-content: space-between; gap: 20px; padding-bottom: 20px; border-bottom: 1px solid #e8e8ed; font-size: 1.05rem; font-weight: 700; letter-spacing: -.02em; }
.form-heading span:last-child { color: var(--red); font-size: .83rem; font-weight: 600; }
.form-row { display: grid; grid-template-columns: 1.5fr .75fr; gap: 14px; }
.field { margin-top: 17px; }
.field label { display: block; margin-bottom: 7px; color: #424245; font-size: .875rem; font-weight: 600; }
.field label > span[aria-hidden="true"] { color: var(--red); }
.optional { color: var(--muted); font-weight: 400; }
.field input, .field textarea { display: block; width: 100%; min-height: 46px; padding: 11px 13px; border: 1px solid #d8d8dd; border-radius: 11px; outline: 0; background: #fafafa; color: var(--ink); font-size: .93rem; transition: border-color .2s ease, box-shadow .2s ease; }
.field textarea { min-height: 78px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(197,43,37,.12); }
.field input::placeholder, .field textarea::placeholder { color: #929298; }
.form-submit { margin-top: 23px; }
.form-status { min-height: 1.5em; margin: 12px 0 0; color: var(--muted); font-size: .82rem; }

.method-section { background: var(--white); }
.method-grid { display: flex; align-items: center; flex-direction: column; }
.method-intro { max-width: 790px; margin-bottom: 44px; text-align: center; }
.method-intro h2 { margin-bottom: 18px; }
.method-intro > p { max-width: 570px; margin-inline: auto; color: var(--muted); font-size: 1.06rem; }
.method-intro .text-link { margin-top: 7px; }
.method-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; width: 100%; padding: 0; margin: 0; list-style: none; }
.method-list li { min-height: 230px; padding: 32px; border-radius: 19px; background: var(--soft); }
.step-number { display: inline-block; margin-bottom: 39px; color: var(--red); font-size: .9rem; font-weight: 700; }
.method-list h3 { margin-bottom: 9px; font-size: 1.25rem; font-weight: 700; letter-spacing: -.035em; }
.method-list p { margin: 0; color: var(--muted); font-size: .95rem; }

.about-section { padding-block: 115px; background: #1d1d1f; color: var(--white); }
.about-grid { display: flex; justify-content: center; }
.about-copy { max-width: 780px; text-align: center; }
.about-copy .eyebrow { color: #ff746c; }
.about-copy h2 { margin-bottom: 21px; }
.about-copy p { max-width: 650px; margin-inline: auto; color: #c7c7cc; font-size: 1.14rem; }
.about-copy .text-link { margin-top: 15px; color: #ff746c; }

.faq-section { background: var(--soft); }
.faq-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(50px, 8vw, 110px); }
.faq-intro > p { max-width: 370px; margin: 23px 0; color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; gap: 22px; padding: 23px 4px 23px 0; cursor: pointer; list-style: none; font-size: 1.04rem; font-weight: 600; letter-spacing: -.015em; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-plus { position: relative; flex: 0 0 20px; width: 20px; height: 20px; }
.faq-plus::before, .faq-plus::after { content: ""; position: absolute; top: 9px; left: 3px; width: 14px; height: 2px; border-radius: 2px; background: var(--red); transition: transform .2s ease; }
.faq-plus::after { transform: rotate(90deg); }
.faq-list details[open] .faq-plus::after { transform: rotate(0); }
.faq-list details p { max-width: 590px; margin: 0 34px 23px 0; color: var(--muted); font-size: .97rem; }
.faq-list details p a { color: var(--red); text-decoration: underline; text-underline-offset: 3px; }

.contact-section { padding-block: 105px; background: #1d1d1f; color: var(--white); }
.contact-inner { display: flex; align-items: center; flex-direction: column; text-align: center; }
.contact-inner .eyebrow { color: #ff746c; }
.contact-inner h2 { margin-bottom: 20px; }
.contact-inner p { max-width: 500px; margin: 0 auto; color: #c7c7cc; font-size: 1.08rem; }
.contact-actions { display: flex; align-items: center; flex-direction: column; gap: 15px; margin-top: 30px; }
.contact-phone { display: inline-flex; align-items: center; gap: 6px; color: #ff746c; font-size: 1rem; }
.contact-phone:hover { text-decoration: underline; text-underline-offset: 3px; }
.contact-phone span { font-size: 1.35em; line-height: .8; }

@media (prefers-reduced-motion: no-preference) {
  @keyframes netvans-enter {
    from { opacity: 0; transform: translate3d(0, 20px, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
  }

  .hero-copy .eyebrow,
  .hero h1,
  .hero-copy > p,
  .hero-actions,
  .hero-visual img {
    animation: netvans-enter .76s cubic-bezier(.22, 1, .36, 1) both;
  }
  .hero-copy .eyebrow { animation-delay: .03s; }
  .hero h1 { animation-delay: .11s; }
  .hero-copy > p { animation-delay: .19s; }
  .hero-actions { animation-delay: .28s; }
  .hero-visual img { animation-delay: .34s; animation-duration: .9s; }

  .reveal-on-scroll {
    transition: opacity .72s cubic-bezier(.22, 1, .36, 1), transform .8s cubic-bezier(.22, 1, .36, 1), box-shadow .35s ease;
    transition-delay: var(--reveal-delay, 0ms);
  }
  .reveal-on-scroll.is-pending { opacity: 0; transform: translate3d(0, 26px, 0); }
  .product-card:nth-child(2), .method-list li:nth-child(2) { --reveal-delay: 90ms; }
  .method-list li:nth-child(3) { --reveal-delay: 180ms; }

  .text-link span, .card-link span, .contact-phone span { transition: transform .28s cubic-bezier(.22, 1, .36, 1); }
  .text-link:hover span, .text-link:focus-visible span,
  .card-link:hover span, .card-link:focus-visible span,
  .contact-phone:hover span, .contact-phone:focus-visible span { transform: translateX(4px); }

  .faq-list details[open] p { animation: netvans-enter .3s ease-out both; }
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .product-card:hover { box-shadow: 0 20px 52px rgba(29,29,31,.09); }
  .product-card > img, .accessory-panel img { transition: transform .5s cubic-bezier(.22, 1, .36, 1); }
  .product-card:hover > img, .product-card:hover .accessory-panel img { transform: scale(1.035); }
}

.site-footer { background: var(--soft); color: #626268; }
.footer-top { display: grid; grid-template-columns: 1.4fr .65fr .9fr 1.1fr; gap: 38px; padding-block: 60px 56px; }
.footer-company p { max-width: 240px; margin: 20px 0 0; font-size: .9rem; }
.footer-group { display: flex; align-items: flex-start; flex-direction: column; gap: 9px; }
.footer-group h3 { margin: 1px 0 10px; color: var(--ink); font-size: .88rem; font-weight: 700; }
.footer-group a, .footer-group address { color: #626268; font-size: .875rem; font-style: normal; line-height: 1.6; }
.footer-group a:hover { color: var(--red); text-decoration: underline; }
.footer-bottom { display: flex; justify-content: space-between; gap: 25px; padding-block: 21px; border-top: 1px solid #d9d9de; color: #74747a; font-size: .78rem; }
.footer-bottom a:hover { color: var(--red); }

@media (max-width: 900px) {
  .header-inner { min-height: 56px; }
  .menu-toggle { display: block; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-7px) rotate(-45deg); }
  .primary-nav { position: absolute; top: 100%; right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 24px 24px; background: rgba(255,255,255,.98); box-shadow: 0 20px 30px rgba(0,0,0,.08); }
  .primary-nav.is-open { display: flex; }
  .primary-nav > a { padding: 11px 0; border-bottom: 1px solid #ededf0; font-size: 1rem; }
  .primary-nav .nav-shop { align-self: flex-start; margin-top: 14px; padding: 9px 18px; border: 1px solid #bdbdc2; }
  .language-switch { align-self: flex-start; gap: 13px; padding: 16px 0 0; font-size: 1rem; }
  .compatibility-grid { gap: 40px; }
  .contact-form { padding: 26px; }
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  html { scroll-padding-top: 62px; }
  .container { width: min(calc(100% - 36px), var(--container)); }
  .utility-inner { gap: 7px; min-height: 42px; font-size: .75rem; }
  .hero-copy { padding-top: 65px; }
  .hero h1 { font-size: clamp(3rem, 11.4vw, 4.9rem); }
  .hero-copy > p { max-width: 520px; font-size: 1.08rem; }
  .hero-visual { height: clamp(280px, 78vw, 430px); margin-top: 25px; }
  .hero-visual img { width: min(73%, 360px); }
  .section { padding-block: 78px; }
  .section-heading { margin-bottom: 32px; }
  .section-heading h2, .method-intro h2, .about-copy h2, .faq-intro h2 { font-size: clamp(2.55rem, 8.8vw, 3.8rem); }
  .product-grid { grid-template-columns: 1fr; gap: 16px; }
  .product-card { min-height: 585px; }
  .product-card-content { padding-top: 44px; }
  .product-card h3 { font-size: clamp(2.4rem, 8vw, 3.2rem); }
  .product-card > img, .accessory-panel { height: 300px; }
  .compatibility-section { padding-block: 80px; }
  .compatibility-grid, .faq-grid { grid-template-columns: 1fr; gap: 34px; }
  .compatibility-copy h2, .contact-inner h2 { font-size: clamp(2.65rem, 9vw, 4.1rem); }
  .compatibility-tip { margin-top: 25px; }
  .method-intro { margin-bottom: 33px; }
  .method-list { grid-template-columns: 1fr; gap: 12px; }
  .method-list li { min-height: 0; padding: 25px; }
  .step-number { margin-bottom: 22px; }
  .about-section, .contact-section { padding-block: 85px; }
  .faq-intro > p { max-width: 500px; }
}

@media (max-width: 430px) {
  .utility-inner > span { display: none; }
  .hero-copy { padding-top: 55px; }
  .hero h1 { font-size: 3rem; }
  .hero-actions { gap: 15px; }
  .hero-visual { height: 315px; }
  .hero-visual img { width: 75%; }
  .product-card { min-height: 530px; }
  .product-card > img, .accessory-panel { height: 245px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 22px; }
  .footer-company, .footer-group:last-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal-on-scroll.is-pending { opacity: 1; transform: none; }
}