:root {
  --ink: #11120f;
  --paper: #f4f3ef;
  --white: #ffffff;
  --line: #d2d2cb;
  --muted: #666860;
  --acid: #b9f227;
  --coral: #ff5a36;
  --green: #123e31;
  --header-height: 82px;
  --content: min(1240px, calc(100vw - 64px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", Inter, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open, body.dialog-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; }

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  height: var(--header-height);
  padding: 0 34px;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.22);
  transition: background .3s ease, color .3s ease, border-color .3s ease;
}
.site-header.scrolled {
  color: var(--ink);
  background: rgba(244,243,239,.96);
  border-color: rgba(17,18,15,.15);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; }
.brand-mark { display: flex; align-items: end; gap: 3px; height: 30px; }
.brand-mark i { display: block; width: 3px; background: currentColor; animation: meter 1.2s ease-in-out infinite alternate; }
.brand-mark i:nth-child(1) { height: 9px; animation-delay: -.6s; }
.brand-mark i:nth-child(2) { height: 20px; animation-delay: -.2s; }
.brand-mark i:nth-child(3) { height: 30px; animation-delay: -.8s; }
.brand-mark i:nth-child(4) { height: 17px; animation-delay: -.4s; }
.brand-mark i:nth-child(5) { height: 8px; }
.brand-name { display: flex; align-items: baseline; gap: 10px; }
.brand-name strong { font-size: 23px; letter-spacing: 0; }
.brand-name small { font-size: 13px; }
.site-nav { display: flex; align-items: center; gap: 36px; font-size: 14px; }
.site-nav a { position: relative; display: inline-flex; align-items: baseline; gap: 6px; padding: 8px 0; }
.site-nav small { font-size: 8px; font-weight: 700; opacity: .55; }
.site-nav a::after { content: ""; position: absolute; left: 0; bottom: 1px; width: 100%; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .25s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.header-link { display: inline-flex; align-items: baseline; justify-self: end; gap: 6px; font-size: 14px; }
.header-link small { font-size: 8px; font-weight: 700; opacity: .55; }
.header-link b { margin-left: 2px; font-weight: 500; }
.menu-toggle { display: none; border: 0; background: transparent; }

.hero {
  position: relative;
  min-height: min(920px, 100svh);
  height: max(720px, 100svh);
  overflow: hidden;
  color: var(--white);
  background: #1a1815;
}
.hero-media { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; object-fit: cover; object-position: center; transform: scale(1.01); animation: hero-in 1.4s cubic-bezier(.2,.8,.2,1) both; }
.hero-shade { position: absolute; inset: 0; background: rgba(10,10,8,.42); }
.hero-content { position: absolute; z-index: 2; left: max(32px, calc((100vw - 1240px) / 2)); top: 50%; width: min(650px, calc(100vw - 64px)); transform: translateY(-43%); }
.eyebrow { margin: 0 0 28px; font-size: 12px; font-weight: 700; letter-spacing: 0; text-transform: uppercase; }
.eyebrow.dark { color: var(--green); }
.hero h1 { margin: 0 0 14px; font-size: clamp(72px, 9vw, 144px); font-weight: 800; line-height: .92; letter-spacing: 0; }
.hero-lead { margin: 0; font-size: clamp(30px, 4.2vw, 64px); font-weight: 600; line-height: 1.12; letter-spacing: 0; }
.hero-categories { margin: 24px 0 0; color: rgba(255,255,255,.78); font-size: 13px; font-weight: 600; line-height: 1.7; }
.hero-categories span { display: block; }
.hero-categories .en-copy { margin-top: 3px; color: rgba(255,255,255,.58); font-size: 11px; font-weight: 500; }
.hero-actions { display: flex; align-items: center; gap: 34px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; min-height: 52px; padding: 0 22px; border: 1px solid transparent; border-radius: 2px; font-size: 14px; font-weight: 700; cursor: pointer; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--ink); background: var(--acid); }
.button-light { color: var(--ink); background: var(--white); }
.text-link { display: inline-flex; gap: 12px; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.55); font-size: 14px; font-weight: 700; }
.dark-link { border-color: var(--ink); }
.hero-meta { position: absolute; z-index: 2; right: max(32px, calc((100vw - 1240px) / 2)); bottom: 38px; display: flex; gap: 34px; }
.hero-meta span { display: flex; flex-direction: column; gap: 4px; max-width: 140px; color: rgba(255,255,255,.72); font-size: 11px; }
.hero-meta strong { color: var(--white); font-size: 17px; }
.sound-meter { position: absolute; z-index: 2; right: 36px; top: 50%; display: flex; align-items: center; gap: 5px; height: 80px; transform: rotate(90deg); }
.sound-meter span { width: 2px; height: 16px; background: var(--acid); animation: meter .9s ease-in-out infinite alternate; }
.sound-meter span:nth-child(2), .sound-meter span:nth-child(7) { animation-delay: -.2s; }
.sound-meter span:nth-child(3), .sound-meter span:nth-child(6) { animation-delay: -.5s; }
.sound-meter span:nth-child(4), .sound-meter span:nth-child(8) { animation-delay: -.7s; }

.section { width: var(--content); margin: 0 auto; padding: 132px 0; }
.section-index { padding-bottom: 28px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; font-weight: 700; }
.intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px 100px; }
.intro .section-index { grid-column: 1 / -1; }
.intro h2, .section-heading h2, .service h2, .journal h2 { margin: 0; font-size: clamp(42px, 5.2vw, 76px); line-height: 1.05; letter-spacing: 0; }
.heading-en { margin: 18px 0 0; color: #777970; font-size: 14px; font-weight: 600; line-height: 1.5; }
.en-copy { display: block; }
.intro-detail { align-self: end; padding-bottom: 4px; }
.intro-detail p { margin: 0 0 20px; color: #3d3f39; font-size: 17px; line-height: 1.85; }
.intro-detail .en-copy { margin-top: -10px; color: #73756d; font-size: 13px; line-height: 1.7; }
.intro-detail .text-link { margin-top: 16px; }
.principles { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); }
.principles article { min-height: 250px; padding: 28px 28px 32px 0; border-right: 1px solid var(--line); }
.principles article + article { padding-left: 28px; }
.principles article:last-child { border-right: 0; }
.principles span { color: var(--muted); font-size: 12px; }
.principles h3 { margin: 56px 0 14px; font-size: 26px; }
.principles h3 small, .service-steps h3 small { display: block; margin-top: 7px; color: var(--coral); font-size: 9px; font-weight: 700; line-height: 1.4; }
.principles p { max-width: 300px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.principles p.en-copy { margin-top: 8px; color: #85877f; font-size: 11px; line-height: 1.55; }

.products { padding-top: 90px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 66px; }
.section-summary { max-width: 580px; margin: 24px 0 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.section-summary .en-copy { margin-top: 8px; color: #85877f; font-size: 12px; line-height: 1.6; }
.product-tabs { display: inline-flex; gap: 4px; padding: 4px; border: 1px solid #bfc0b8; border-radius: 5px; }
.tab-button { min-width: 92px; height: 40px; padding: 0 16px; border: 0; border-radius: 3px; color: var(--muted); background: transparent; cursor: pointer; }
.tab-button.active { color: var(--white); background: var(--ink); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 42px 18px; }
.product-card { min-width: 0; opacity: 1; transform: translateY(0); transition: opacity .25s ease, transform .25s ease; }
.product-card.hidden { display: none; }
.product-trigger { display: block; width: 100%; height: 100%; padding: 0; border: 0; text-align: left; background: transparent; cursor: pointer; }
.product-trigger:focus-visible { outline: 2px solid var(--coral); outline-offset: 5px; }
.product-image { display: block; aspect-ratio: 1 / 1; overflow: hidden; background: #fff; }
.product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s cubic-bezier(.2,.7,.2,1); }
.product-card:hover img { transform: scale(1.045); }
.product-info { display: flex; justify-content: space-between; gap: 16px; padding-top: 18px; }
.product-info > span { display: flex; flex-direction: column; align-items: flex-start; }
.product-info > span > span { color: var(--muted); font-size: 11px; }
.product-info strong { margin-top: 5px; font-size: 25px; }
.product-info b { align-self: end; max-width: 160px; color: var(--muted); font-size: 12px; font-weight: 500; text-align: right; line-height: 1.5; }
.product-cta { display: flex; justify-content: space-between; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; font-weight: 700; transition: color .2s ease, border-color .2s ease; }
.product-card:hover .product-cta, .product-trigger:focus-visible .product-cta { color: var(--ink); border-color: var(--ink); }
.product-note { margin: 48px 0 0; color: var(--muted); font-size: 12px; text-align: right; }

.product-dialog { width: min(1040px, calc(100vw - 48px)); max-width: none; max-height: calc(100svh - 48px); padding: 0; overflow: auto; border: 0; border-radius: 4px; color: var(--ink); background: var(--paper); box-shadow: 0 30px 90px rgba(0,0,0,.28); }
.product-dialog::backdrop { background: rgba(8,10,8,.72); backdrop-filter: blur(7px); }
.dialog-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr); min-height: 620px; }
.dialog-media { display: grid; place-items: center; min-width: 0; background: var(--white); }
.dialog-media img { width: 100%; height: 100%; padding: 32px; object-fit: contain; }
.dialog-copy { display: flex; flex-direction: column; min-width: 0; padding: 68px 58px 48px; }
.dialog-close { position: absolute; z-index: 2; top: 18px; right: 18px; display: grid; place-items: center; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: rgba(244,243,239,.94); font-size: 25px; line-height: 1; cursor: pointer; }
.dialog-close:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; }
.dialog-category { margin: 0 0 12px; color: var(--coral); font-size: 11px; font-weight: 700; }
.product-dialog h2 { margin: 0; font-size: 54px; line-height: 1; letter-spacing: 0; }
.dialog-tagline { margin: 16px 0 0; font-size: 18px; font-weight: 600; }
.dialog-description { margin: 28px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.dialog-features { margin: 28px 0 34px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.dialog-features li { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.dialog-features li::before { content: "↗"; color: var(--coral); }
.dialog-actions { margin-top: auto; }
.product-buy { width: 100%; }
.dialog-actions small { display: block; margin-top: 12px; color: var(--muted); font-size: 10px; }

.feature { overflow: hidden; scroll-margin-top: var(--header-height); color: var(--white); background: var(--ink); }
.feature-visual { width: 100%; overflow: hidden; background: #dceff3; }
.feature-visual img { width: 100%; height: auto; }
.feature-copy { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 60px; width: var(--content); margin: 0 auto; padding: 42px 0 46px; }
.feature-copy .eyebrow { margin-bottom: 10px; color: var(--acid); }
.feature-copy h2 { margin: 0 0 10px; font-size: clamp(38px, 4vw, 58px); line-height: 1; letter-spacing: 0; }
.feature-copy > div > p:not(.eyebrow) { max-width: 560px; margin: 0; color: #b7b8b0; font-size: 15px; line-height: 1.7; }

.technology { position: relative; width: 100%; padding: 130px max(32px, calc((100vw - 1240px) / 2)) 80px; overflow: hidden; color: var(--white); background: var(--ink); }
.technology-top { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 360px; align-items: end; gap: 100px; }
.technology-top h2 { max-width: 820px; margin: 0; font-size: clamp(46px, 6vw, 88px); line-height: 1.05; letter-spacing: 0; }
.technology-top .heading-en { max-width: 600px; color: #8e9087; }
.technology-top > p { margin: 0 0 9px; color: #aaa99f; font-size: 16px; line-height: 1.8; }
.technology-top > p .en-copy { margin-top: 12px; color: #777970; font-size: 12px; line-height: 1.65; }
.stat-grid { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 116px; border-top: 1px solid #4b4c45; }
.stat-grid article { min-height: 218px; padding: 28px 18px 0 0; border-right: 1px solid #4b4c45; }
.stat-grid article + article { padding-left: 24px; }
.stat-grid article:last-child { border-right: 0; }
.stat-grid strong { display: block; color: var(--acid); font-size: clamp(64px, 7vw, 104px); font-weight: 600; line-height: 1; }
.stat-grid span { display: block; margin-top: 18px; color: #b7b8b0; font-size: 13px; }
.stat-grid span small { display: block; margin-top: 6px; color: #72746d; font-size: 9px; line-height: 1.45; }
.tech-lines { position: absolute; right: -10vw; bottom: 80px; display: flex; align-items: center; gap: 16px; height: 300px; opacity: .12; }
.tech-lines span { width: 22px; height: 20%; background: var(--acid); }
.tech-lines span:nth-child(2), .tech-lines span:nth-child(6) { height: 50%; }
.tech-lines span:nth-child(3), .tech-lines span:nth-child(5) { height: 82%; }
.tech-lines span:nth-child(4) { height: 100%; }

.service { display: grid; grid-template-columns: .85fr 1.15fr; gap: 110px; }
.service-heading { position: sticky; top: 120px; align-self: start; }
.service-heading > p:last-child { max-width: 480px; margin: 34px 0 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.service-heading > p:last-child .en-copy { margin-top: 10px; color: #85877f; font-size: 12px; line-height: 1.65; }
.service-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.service-steps li { display: grid; grid-template-columns: 70px 1fr; gap: 26px; padding: 32px 0 38px; border-bottom: 1px solid var(--line); }
.service-steps > li > span { color: var(--coral); font-size: 12px; font-weight: 700; }
.service-steps h3 { margin: 0 0 10px; font-size: 27px; }
.service-steps p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.service-steps p .en-copy { margin-top: 7px; color: #85877f; font-size: 11px; line-height: 1.55; }

.journal { padding-top: 54px; }
.section-heading.compact { align-items: center; }
.journal h2 { font-size: clamp(42px, 5vw, 68px); }
.journal-date { color: var(--muted); font-size: 11px; }
.journal-list { border-top: 1px solid var(--ink); }
.journal-list article { display: grid; grid-template-columns: 90px 1fr 50px; align-items: center; gap: 24px; min-height: 156px; border-bottom: 1px solid var(--line); }
.article-no { color: var(--muted); font-size: 12px; }
.journal-list p { margin: 0 0 12px; color: var(--muted); font-size: 12px; }
.journal-list h3 { max-width: 850px; margin: 0; font-size: clamp(20px, 2.1vw, 29px); font-weight: 600; line-height: 1.4; }
.journal-list h3 a { transition: color .2s ease; }
.journal-list article:hover h3 a, .journal-list h3 a:focus-visible { color: var(--coral); }
.journal-list article > a { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; transition: color .2s ease, background .2s ease; }
.journal-list article > a:hover, .journal-list article > a:focus-visible { color: var(--white); background: var(--ink); }

.contact { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 100px; padding: 120px max(32px, calc((100vw - 1240px) / 2)); color: var(--white); background: var(--green); }
.contact h2 { margin: 0 0 34px; font-size: clamp(52px, 6.4vw, 96px); line-height: 1.02; letter-spacing: 0; }
.contact .heading-en { margin-top: -20px; margin-bottom: 30px; color: #9ab4aa; }
.contact-note { margin: 0; color: #9ab4aa; font-size: 13px; font-weight: 700; }
.contact-note .en-copy { margin-top: 7px; font-size: 9px; }
.contact-phone { display: inline-flex; flex-direction: column; gap: 7px; margin-top: 46px; padding: 0 48px 13px 0; border-bottom: 1px solid rgba(255,255,255,.35); }
.contact-phone span { color: #9ab4aa; font-size: 11px; font-weight: 700; }
.contact-phone strong { font-size: 28px; font-weight: 600; }
.wechat-contact { justify-self: end; width: 278px; margin: 0; }
.wechat-qr { width: 278px; height: 278px; padding: 10px; background: var(--white); }
.wechat-qr img { width: 258px; height: 258px; object-fit: contain; }
.wechat-contact figcaption { display: flex; flex-direction: column; gap: 6px; margin-top: 18px; }
.wechat-contact figcaption strong { font-size: 18px; }
.wechat-contact figcaption span { color: #9ab4aa; font-size: 12px; }
.wechat-contact figcaption small { color: #78968b; font-size: 9px; line-height: 1.5; }

.site-footer { display: grid; grid-template-columns: 1.2fr 1fr .8fr; gap: 70px; padding: 64px max(32px, calc((100vw - 1240px) / 2)) 34px; color: #c9cac2; background: #0a0b09; }
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-brand strong { color: var(--white); font-size: 48px; line-height: 1; }
.footer-brand span, .site-footer > div > span { font-size: 10px; }
.site-footer p { margin: 10px 0 0; font-size: 12px; line-height: 1.7; }
.site-footer .en-copy { margin-top: 4px; color: #777972; font-size: 10px; line-height: 1.55; }
.store-links { display: flex; flex-direction: column; align-items: flex-end; gap: 14px; font-size: 13px; }
.copyright { grid-column: 1 / -1; padding-top: 28px; border-top: 1px solid #2e302b; color: #777972; }

@keyframes meter { from { transform: scaleY(.45); } to { transform: scaleY(1); } }
@keyframes hero-in { from { opacity: 0; transform: scale(1.06); } to { opacity: 1; transform: scale(1.01); } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }

@media (max-width: 980px) {
  :root { --content: calc(100vw - 40px); --header-height: 70px; }
  .site-header { grid-template-columns: 1fr auto; padding: 0 20px; }
  .header-link { display: none; }
  .menu-toggle { position: relative; z-index: 102; display: flex; flex-direction: column; justify-content: center; gap: 7px; width: 42px; height: 42px; padding: 9px; }
  .menu-toggle span { display: block; width: 100%; height: 1px; background: currentColor; transition: transform .25s ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; z-index: 101; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 10px; padding: 90px 28px 40px; color: var(--white); background: var(--ink); transform: translateX(100%); transition: transform .35s cubic-bezier(.2,.8,.2,1); }
  .site-nav.open { transform: translateX(0); }
  .site-nav a { width: 100%; gap: 12px; padding: 10px 0; font-size: 38px; font-weight: 600; }
  .site-nav small { font-size: 11px; }
  .brand { position: relative; z-index: 102; }
  .brand-name small { display: none; }
  .hero { min-height: 720px; height: 100svh; }
  .hero-content { left: 24px; width: calc(100vw - 48px); }
  .hero-meta { left: 24px; right: 24px; bottom: 24px; justify-content: space-between; }
  .hero-meta span:nth-child(2) { display: none; }
  .sound-meter { display: none; }
  .intro { grid-template-columns: 1fr; gap: 46px; }
  .intro .section-index, .principles { grid-column: auto; }
  .section { padding: 96px 0; }
  .principles { grid-template-columns: 1fr; }
  .principles article, .principles article + article { min-height: auto; padding: 28px 0 32px; border-right: 0; border-bottom: 1px solid var(--line); }
  .principles h3 { margin-top: 28px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .dialog-layout { grid-template-columns: .9fr 1.1fr; min-height: 560px; }
  .dialog-copy { padding: 62px 38px 38px; }
  .product-dialog h2 { font-size: 44px; }
  .technology-top { grid-template-columns: 1fr; gap: 38px; }
  .technology-top > p { max-width: 600px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); margin-top: 76px; }
  .stat-grid article:nth-child(2) { border-right: 0; }
  .stat-grid article:nth-child(-n+2) { border-bottom: 1px solid #4b4c45; }
  .service { grid-template-columns: 1fr; gap: 58px; }
  .service-heading { position: static; }
  .contact { grid-template-columns: 1fr; gap: 72px; }
  .wechat-contact { justify-self: start; }
}

@media (max-width: 640px) {
  :root { --content: calc(100vw - 32px); }
  .brand-name strong { font-size: 20px; }
  .brand-mark { height: 25px; }
  .hero { height: 820px; max-height: 100svh; min-height: 670px; }
  .hero-media { object-position: 46% center; }
  .hero-shade { background: rgba(10,10,8,.51); }
  .hero-content { top: 44%; left: 16px; width: calc(100vw - 32px); transform: translateY(-42%); }
  .hero h1 { font-size: clamp(58px, 19vw, 80px); }
  .hero-lead { font-size: clamp(28px, 9vw, 40px); }
  .hero-categories { max-width: 330px; margin-top: 18px; font-size: 12px; }
  .eyebrow { margin-bottom: 18px; }
  .hero-actions { align-items: flex-start; gap: 20px; margin-top: 24px; }
  .button { gap: 22px; }
  .hero-meta { left: 16px; right: 16px; }
  .hero-meta span:last-child { text-align: right; }
  .section { padding: 78px 0; }
  .intro { gap: 36px; }
  .intro h2, .section-heading h2, .service h2, .journal h2 { font-size: 42px; }
  .intro-detail p { font-size: 15px; }
  .heading-en { margin-top: 14px; font-size: 12px; }
  .intro-detail .en-copy { font-size: 12px; }
  .section-heading { align-items: flex-start; flex-direction: column; margin-bottom: 42px; }
  .product-tabs { width: 100%; }
  .tab-button { flex: 1; min-width: 0; padding: 0 8px; }
  .product-grid { grid-template-columns: 1fr 1fr; gap: 34px 10px; }
  .product-info { flex-direction: column; gap: 5px; }
  .product-info strong { font-size: 20px; }
  .product-info b { align-self: start; max-width: none; text-align: left; }
  .product-cta { margin-top: 12px; }
  .product-note { margin-top: 32px; text-align: left; }
  .product-dialog { width: calc(100vw - 20px); max-height: calc(100svh - 20px); }
  .dialog-layout { grid-template-columns: 1fr; min-height: 0; }
  .dialog-media { aspect-ratio: 4 / 3; }
  .dialog-media img { padding: 18px; }
  .dialog-copy { padding: 30px 22px 24px; }
  .dialog-close { top: 12px; right: 12px; }
  .product-dialog h2 { font-size: 38px; }
  .dialog-tagline { margin-top: 12px; font-size: 16px; }
  .dialog-description { margin-top: 20px; }
  .dialog-features { margin: 20px 0 26px; }
  .feature-copy { display: block; width: calc(100vw - 32px); padding: 28px 0 34px; }
  .feature-copy h2 { font-size: 40px; }
  .feature-copy > div > p:not(.eyebrow) { max-width: 330px; font-size: 14px; }
  .feature-copy .button { width: 100%; margin-top: 24px; }
  .technology { padding: 78px 16px 48px; }
  .technology-top h2 { font-size: 46px; }
  .technology-top > p { font-size: 14px; }
  .stat-grid { margin-top: 58px; }
  .stat-grid article { min-height: 150px; padding-top: 22px; }
  .stat-grid article + article { padding-left: 15px; }
  .stat-grid strong { font-size: 56px; }
  .service-steps li { grid-template-columns: 46px 1fr; gap: 10px; }
  .journal { padding-top: 20px; }
  .journal-date { display: none; }
  .journal-list article { grid-template-columns: 38px 1fr; gap: 12px; min-height: 148px; padding: 22px 0; }
  .journal-list article > a { display: none; }
  .contact { grid-template-columns: 1fr; padding: 76px 16px; }
  .contact h2 { margin-bottom: 28px; font-size: 46px; }
  .contact-phone { margin-top: 32px; }
  .wechat-contact { width: 258px; }
  .wechat-qr { width: 258px; height: 258px; padding: 8px; }
  .wechat-qr img { width: 242px; height: 242px; }
  .site-footer { grid-template-columns: 1fr; gap: 38px; padding: 52px 16px 30px; }
  .store-links { align-items: flex-start; }
  .copyright { grid-column: auto; }
}