:root {
  --paper: #f5f2eb;
  --paper-2: #ebe8df;
  --ink: #12334c;
  --navy: #0b3b63;
  --deep: #082942;
  --green: #35a784;
  --orange: #ee8a24;
  --white: #fffdf8;
  --muted: #65717a;
  --line: rgba(18, 51, 76, .19);
  --pad: clamp(22px, 5vw, 76px);
  --section-y: clamp(92px, 10vw, 150px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }

.site-header { position: fixed; z-index: 50; inset: 0 0 auto; height: 80px; padding: 0 var(--pad); display: flex; align-items: center; color: var(--white); border-bottom: 1px solid rgba(255,255,255,.24); transition: height .3s, color .3s, background-color .3s; }
.site-header.scrolled, .site-header.menu-active { height: 68px; color: var(--ink); background: rgba(245,242,235,.96); border-color: var(--line); backdrop-filter: blur(14px); }
.brand { display: flex; align-items: center; min-width: 170px; }
.brand-logo { width: 124px; height: 58px; object-fit: contain; object-position: left center; }
.logo-color { display: none; }
.site-header.scrolled .logo-light, .site-header.menu-active .logo-light { display: none; }
.site-header.scrolled .logo-color, .site-header.menu-active .logo-color { display: block; }
.desktop-nav { margin: auto; display: flex; gap: clamp(24px, 3vw, 48px); font-size: 13px; }
.desktop-nav a, .header-contact { position: relative; padding: 8px 0; }
.desktop-nav a::after, .header-contact::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 2px; height: 1px; background: currentColor; transition: right .25s; }
.desktop-nav a:hover::after, .header-contact:hover::after { right: 0; }
.header-contact { font-size: 13px; }
.header-contact span { color: var(--orange); }
.menu-button { display: none; width: 42px; height: 42px; margin-left: auto; padding: 10px; border: 0; background: transparent; color: inherit; }
.menu-button span { display: block; height: 1px; margin: 7px 0; background: currentColor; transition: transform .25s; }
.mobile-menu { display: none; }

.hero { position: relative; height: 92svh; min-height: 680px; max-height: 900px; color: var(--white); overflow: hidden; background: #102e35; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 48%; }
.hero-shade { position: absolute; inset: 0; background: rgba(5, 28, 43, .37); }
.hero-content { position: absolute; z-index: 2; left: var(--pad); top: 46%; transform: translateY(-42%); }
.eyebrow, .kicker, .product-index { font: 500 11px/1.5 "DM Mono", monospace; }
.eyebrow { margin: 0; }
.hero h1 { max-width: 900px; margin: 26px 0 28px; font-size: clamp(64px, 9vw, 132px); line-height: .96; letter-spacing: 0; font-weight: 700; }
.hero-summary { margin: 0; font-size: clamp(15px, 1.35vw, 20px); line-height: 1.9; font-weight: 300; }
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 40px; }
.button { min-height: 48px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; gap: 35px; border: 1px solid currentColor; font-size: 13px; transition: color .25s, background-color .25s; }
.button-light { color: var(--deep); background: var(--white); border-color: var(--white); }
.button-light:hover { color: var(--white); background: transparent; }
.text-link { padding-bottom: 5px; border-bottom: 1px solid; font-size: 13px; }
.text-link span { color: #7ee2b7; }
.hero-facts { position: absolute; z-index: 2; right: var(--pad); bottom: 44px; display: flex; }
.hero-facts div { min-width: 122px; padding: 0 22px; border-left: 1px solid rgba(255,255,255,.5); }
.hero-facts strong, .hero-facts span { display: block; }
.hero-facts strong { font-size: 13px; }
.hero-facts span { margin-top: 6px; font-size: 10px; color: rgba(255,255,255,.72); }
.hero-side { position: absolute; z-index: 2; right: -35px; top: 48%; margin: 0; transform: rotate(90deg); font: 10px "DM Mono", monospace; }

.section { position: relative; padding: var(--section-y) var(--pad); }
.section-marker { display: flex; align-items: flex-start; gap: 16px; min-width: 190px; }
.section-marker > span { color: var(--orange); font: 500 30px/1 "DM Mono", monospace; }
.section-marker p { margin: 0; font: 500 10px/1.55 "DM Mono", monospace; }
.kicker { margin: 0 0 20px; color: var(--green); }
.intro { min-height: 780px; display: grid; grid-template-columns: minmax(180px, 1fr) minmax(500px, 2.2fr); gap: 4vw; align-items: start; overflow: hidden; }
.intro-copy { padding-top: 80px; position: relative; z-index: 2; }
.intro h2, .section-heading h2, .tech-top h2, .about h2, .collaboration h2, .contact h2 { margin: 0; font-size: clamp(44px, 6.2vw, 88px); line-height: 1.12; letter-spacing: 0; font-weight: 600; }
.intro h2 span, .about h2 span { color: var(--green); }
.intro-copy > p:last-child { max-width: 610px; margin: 55px 0 0 24%; font-size: 15px; line-height: 2; color: var(--muted); }
.intro-orbit { position: absolute; right: -11vw; bottom: -15vw; width: min(53vw, 760px); aspect-ratio: 1; }
.intro-orbit i { position: absolute; border: 1px solid rgba(53,167,132,.45); border-radius: 50%; }
.intro-orbit i:nth-child(1) { inset: 0; }
.intro-orbit i:nth-child(2) { inset: 14%; }
.intro-orbit i:nth-child(3) { inset: 28%; }
.intro-orbit b { position: absolute; left: 49%; top: 12%; width: 16px; height: 16px; border-radius: 50%; background: var(--orange); animation: breathe 4s ease-in-out infinite; }
@keyframes breathe { 50% { transform: scale(1.5); opacity: .45; } }

.products { padding-bottom: 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(460px, 2fr) minmax(220px, .8fr); gap: 4vw; align-items: end; margin-bottom: 95px; }
.heading-note { margin: 0 0 8px; max-width: 340px; font-size: 14px; line-height: 1.9; color: var(--muted); }
.product { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(420px, .75fr); min-height: 720px; margin: 0 calc(var(--pad) * -1); border-top: 1px solid var(--line); }
.product:nth-of-type(odd) .product-visual { order: 2; }
.product-visual { min-width: 0; overflow: hidden; background: var(--paper-2); }
.product-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.product:hover .product-visual img { transform: scale(1.018); }
.product-xiaomo .product-visual img { object-fit: contain; padding: clamp(26px, 4vw, 70px); background: #f0f1ef; }
.product-mewave .product-visual img { object-position: center; }
.product-module .product-visual img { object-position: center; }
.product-copy { padding: clamp(60px, 7vw, 105px) var(--pad); display: flex; flex-direction: column; justify-content: center; }
.product-index { color: var(--orange); }
.product h3 { margin: 28px 0 6px; font-size: clamp(58px, 7vw, 100px); line-height: 1; font-weight: 650; }
.product h4 { margin: 0 0 30px; font-size: clamp(18px, 1.7vw, 26px); font-weight: 500; color: var(--green); }
.product-copy > p:not(.product-index) { max-width: 580px; margin: 0; font-size: 14px; line-height: 2; color: var(--muted); }
.feature-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 38px 0 42px; padding: 0; border-top: 1px solid var(--line); }
.feature-list li { padding: 13px 4px; border-bottom: 1px solid var(--line); font-size: 12px; }
.feature-list li:nth-child(odd) { margin-right: 14px; }
.inline-link { width: fit-content; padding-bottom: 6px; border-bottom: 1px solid; font-size: 13px; }
.inline-link span { margin-left: 18px; color: var(--orange); }

.technology { min-height: 940px; padding-bottom: 210px; color: var(--white); background: var(--deep); overflow: hidden; }
.section-marker.inverse > span, .technology .kicker { color: #72d3b0; }
.tech-top { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(500px, 3fr); gap: 4vw; }
.tech-top .kicker { grid-column: 2; margin-bottom: 0; }
.tech-top h2 { grid-column: 2; }
.tech-stages { display: grid; grid-template-columns: repeat(4, 1fr); margin: 100px 0 0 max(16vw, 190px); border-top: 1px solid rgba(255,255,255,.25); }
.tech-stages article { min-height: 270px; padding: 30px clamp(22px, 3vw, 46px) 28px 0; border-right: 1px solid rgba(255,255,255,.2); }
.tech-stages article + article { padding-left: clamp(22px, 3vw, 46px); }
.tech-stages span { color: var(--orange); font: 11px "DM Mono", monospace; }
.tech-stages h3 { margin: 26px 0 18px; font-size: 30px; }
.tech-stages p { min-height: 85px; margin: 0; font-size: 13px; line-height: 1.85; color: rgba(255,255,255,.65); }
.tech-stages b { font-size: 11px; color: #72d3b0; }
.signal-track { position: absolute; left: 0; right: 0; bottom: 82px; height: 100px; display: flex; align-items: center; overflow: hidden; }
.signal-track::before, .signal-track::after { content: ""; position: absolute; left: 0; right: 0; height: 1px; background: rgba(114,211,176,.35); }
.signal-track span { position: absolute; left: 35%; width: 30%; height: 90px; border-left: 2px solid #72d3b0; border-right: 2px solid #72d3b0; transform: skewX(-38deg); opacity: .85; }

.scenarios { border-bottom: 1px solid var(--line); }
.scenario-grid { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 40px; border-top: 1px solid var(--ink); }
.scenario-grid article { min-height: 240px; padding: 24px 25px 30px 0; border-right: 1px solid var(--line); }
.scenario-grid article + article { padding-left: 25px; }
.scenario-grid span { color: var(--orange); font: 11px "DM Mono", monospace; }
.scenario-grid h3 { margin: 58px 0 14px; font-size: 21px; }
.scenario-grid p { margin: 0; font-size: 12px; line-height: 1.8; color: var(--muted); }
.boundary { max-width: 850px; margin: 56px 0 0 auto; padding-left: 25px; border-left: 3px solid var(--green); font-size: 12px; line-height: 1.8; color: var(--muted); }

.about { padding-bottom: 0; }
.about-main { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(500px, 2.2fr); gap: 4vw; }
.about-text { max-width: 610px; margin: 55px 0 0 25%; font-size: 14px; line-height: 2; color: var(--muted); }
.milestones { display: grid; grid-template-columns: repeat(4, 1fr); margin: 110px calc(var(--pad) * -1) 0; padding: 48px var(--pad); color: var(--white); background: var(--navy); }
.milestones div { min-height: 120px; padding-right: 28px; border-right: 1px solid rgba(255,255,255,.25); }
.milestones div + div { padding-left: 28px; }
.milestones strong { display: block; font: 500 clamp(24px, 2.5vw, 38px)/1.2 "DM Mono", monospace; color: #72d3b0; }
.milestones span { display: block; margin-top: 18px; font-size: 12px; line-height: 1.8; color: rgba(255,255,255,.7); }

.collaboration { min-height: 720px; background: #dfeee8; }
.collab-copy { margin-left: max(16vw, 190px); }
.collab-copy h2 { max-width: 900px; }
.collab-copy > p:last-child { max-width: 640px; margin: 45px 0 0 26%; font-size: 14px; line-height: 2; color: var(--muted); }
.collab-flow { list-style: none; display: grid; grid-template-columns: repeat(6, 1fr); margin: 100px 0 0; padding: 0; border-top: 1px solid rgba(18,51,76,.5); }
.collab-flow li { position: relative; padding-top: 28px; font-size: 13px; }
.collab-flow li::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--orange); }
.collab-flow span { display: block; margin-bottom: 10px; color: var(--green); font: 11px "DM Mono", monospace; }

.contact { min-height: 720px; display: grid; grid-template-columns: 1.5fr 1fr; gap: 8vw; align-items: center; color: var(--white); background: var(--green); }
.contact h2 { margin: 28px 0 30px; color: var(--deep); }
.contact-copy > p:not(.eyebrow) { font-size: 14px; }
.button-dark { margin-top: 35px; color: var(--white); background: var(--deep); border-color: var(--deep); }
.button-dark:hover { color: var(--deep); background: transparent; }
.contact-details { display: grid; grid-template-columns: 1fr 120px; align-items: end; gap: 30px; padding-left: 40px; border-left: 1px solid rgba(255,255,255,.5); }
.contact-details div { grid-column: 1; padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,.45); }
.contact-details span { display: block; margin-bottom: 9px; font: 10px "DM Mono", monospace; color: var(--deep); }
.contact-details a, .contact-details p { margin: 0; font-size: 13px; overflow-wrap: anywhere; }
.contact-details img { grid-column: 2; grid-row: 1 / 3; width: 120px; height: 120px; object-fit: cover; }

footer { min-height: 160px; padding: 35px var(--pad); display: flex; align-items: center; gap: 6vw; color: var(--white); background: var(--deep); font: 10px "DM Mono", monospace; }
footer .brand { min-width: 220px; }
footer .brand-logo { width: 138px; height: 70px; }
footer > a:last-child { margin-left: auto; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .product { grid-template-columns: 1fr 1fr; min-height: 620px; }
  .tech-stages { margin-left: 0; }
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .scenario-grid article:nth-child(3) { border-right: 0; }
  .scenario-grid article:nth-child(n+4) { border-top: 1px solid var(--line); }
  .collab-copy { margin-left: 0; }
}

@media (max-width: 760px) {
  :root { --section-y: 80px; }
  .site-header { height: 66px; }
  .desktop-nav, .header-contact { display: none; }
  .menu-button { display: block; }
  .menu-button.open span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button.open span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .mobile-menu { display: block; position: fixed; z-index: 40; inset: 0; padding: 110px var(--pad) 50px; color: var(--ink); background: var(--paper); transform: translateY(-101%); visibility: hidden; pointer-events: none; transition: transform .32s ease, visibility 0s linear .32s; }
  .mobile-menu.open { transform: none; visibility: visible; pointer-events: auto; transition-delay: 0s; }
  .mobile-menu nav { display: flex; flex-direction: column; }
  .mobile-menu a { padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 30px; }
  .mobile-menu a span { display: inline-block; width: 40px; color: var(--orange); font: 10px "DM Mono", monospace; }

  .hero { height: 92svh; min-height: 650px; max-height: 820px; }
  .hero-image { object-position: 64% center; }
  .hero-shade { background: rgba(5,28,43,.48); }
  .hero-content { top: 43%; right: var(--pad); transform: translateY(-40%); }
  .hero h1 { margin-top: 20px; font-size: clamp(56px, 18vw, 78px); }
  .hero-summary { font-size: 14px; }
  .hero-summary br { display: none; }
  .hero-actions { gap: 20px; margin-top: 30px; }
  .button { gap: 22px; }
  .hero-facts { left: var(--pad); right: auto; bottom: 25px; width: calc(100% - var(--pad) * 2); }
  .hero-facts div { min-width: 0; flex: 1; padding: 0 10px; }
  .hero-facts div:first-child { padding-left: 0; border-left: 0; }
  .hero-facts strong { font-size: 11px; }
  .hero-side { display: none; }

  .intro, .section-heading, .about-main, .tech-top { display: block; }
  .section-marker { margin-bottom: 60px; }
  .intro { min-height: 740px; }
  .intro-copy { padding-top: 0; }
  .intro-copy > p:last-child, .about-text, .collab-copy > p:last-child { margin: 38px 0 0; }
  .intro-orbit { width: 90vw; right: -35vw; bottom: -10vw; }
  .section-heading { margin-bottom: 60px; }
  .section-heading .heading-note { margin-top: 30px; }

  .product { display: flex; flex-direction: column; min-height: 0; }
  .product:nth-of-type(odd) .product-visual { order: 0; }
  .product-visual { height: 420px; }
  .product-xiaomo .product-visual img { padding: 20px; }
  .product-copy { padding-top: 58px; padding-bottom: 65px; }
  .product h3 { font-size: clamp(54px, 16vw, 74px); }

  .technology { min-height: 1100px; padding-bottom: 150px; }
  .tech-top .kicker, .tech-top h2 { grid-column: auto; }
  .tech-stages { grid-template-columns: 1fr 1fr; margin-top: 65px; }
  .tech-stages article { min-height: 230px; padding: 25px 18px 20px 0; border-bottom: 1px solid rgba(255,255,255,.2); }
  .tech-stages article + article { padding-left: 18px; }
  .tech-stages article:nth-child(2) { border-right: 0; }
  .tech-stages p { min-height: 100px; }

  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .scenario-grid article, .scenario-grid article + article { min-height: 190px; padding: 22px 16px 22px 0; border-right: 1px solid var(--line); }
  .scenario-grid article:nth-child(even) { padding-left: 16px; border-right: 0; }
  .scenario-grid article:nth-child(n+3) { border-top: 1px solid var(--line); }
  .scenario-grid h3 { margin-top: 34px; }
  .scenario-grid article:last-child { grid-column: 1 / 3; }

  .milestones { grid-template-columns: 1fr 1fr; margin-top: 75px; padding-top: 35px; padding-bottom: 35px; }
  .milestones div { min-height: 130px; padding: 15px; border-bottom: 1px solid rgba(255,255,255,.2); }
  .milestones div + div { padding-left: 15px; }
  .milestones div:nth-child(even) { border-right: 0; }
  .collaboration { min-height: 780px; }
  .collab-flow { grid-template-columns: 1fr 1fr; margin-top: 70px; }
  .collab-flow li { padding-bottom: 22px; }

  .contact { min-height: 760px; display: block; }
  .contact-details { margin-top: 70px; padding-left: 0; border-left: 0; }
  .contact h2 { font-size: clamp(42px, 13vw, 62px); }
  footer { align-items: flex-start; flex-wrap: wrap; gap: 22px; }
  footer .brand { width: 100%; }
  footer > a:last-child { margin-left: 0; }
}

@media (max-width: 390px) {
  .hero h1 { font-size: 54px; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-facts span { display: none; }
  .product-visual { height: 350px; }
  .tech-stages { grid-template-columns: 1fr; }
  .tech-stages article, .tech-stages article + article { min-height: 0; padding: 24px 0; border-right: 0; }
  .tech-stages p { min-height: 0; margin-bottom: 18px; }
  .technology { min-height: 1250px; }
  .contact-details { grid-template-columns: 1fr 96px; }
  .contact-details img { width: 96px; height: 96px; }
}

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