:root {
  --orange: #ef6c1a;
  --orange-dark: #c84d08;
  --ink: #172027;
  --muted: #68737b;
  --line: #dfe4e7;
  --soft: #f3f5f5;
  --paper: #ffffff;
  --dark: #172027;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #f7f8f8;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }

.site-header {
  width: min(calc(100% - 48px), var(--max));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand > span:last-child { display: flex; flex-direction: column; line-height: 1; }
.brand strong { font-size: 22px; letter-spacing: .18em; }
.brand small { margin-top: 5px; color: #7b858b; font-size: 8px; letter-spacing: .16em; }
.brand-mark {
  position: relative;
  width: 38px;
  height: 38px;
  border: 7px solid var(--orange);
  border-top-color: transparent;
  border-radius: 50% 50% 55% 45%;
  transform: rotate(-18deg);
}
.brand-mark::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 11px;
  right: -7px;
  top: -3px;
  border-radius: 50%;
  background: var(--orange);
}
.brand-mark i { display: none; }
.official-site-brand img { width: 206px; height: 40px; object-fit: contain; object-position: left center; }
.desktop-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; }
.desktop-nav a:not(.nav-cta) { color: #48535a; }
.desktop-nav a:hover { color: var(--orange); }
.lang-toggle {
  min-width: 46px;
  height: 36px;
  padding: 0 11px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #cfd6d9;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  text-decoration: none;
  transition: color .2s, border-color .2s, background .2s;
}
.lang-toggle:hover { color: var(--orange); background: #fff5ee; border-color: #f1b78f; }
.nav-cta, .primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  color: #fff !important;
  background: var(--orange);
  border-radius: 3px;
  font-weight: 700;
  transition: transform .25s, background .25s;
}
.nav-cta:hover, .primary-btn:hover { background: var(--orange-dark); transform: translateY(-2px); }

.hero {
  width: min(calc(100% - 48px), var(--max));
  min-height: 610px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 72px;
  padding: 55px 0 75px;
}
.eyebrow { color: var(--orange); font-size: 12px; font-weight: 800; letter-spacing: .16em; }
.hero h1 { margin: 20px 0 24px; font-size: clamp(44px, 5vw, 72px); line-height: 1.12; letter-spacing: -.05em; }
.hero h1 em { color: var(--orange); font-style: normal; }
.hero-copy > p { max-width: 600px; margin: 0; color: #59656d; font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 34px; }
.primary-btn { min-height: 50px; padding: 0 30px; }
.text-btn { font-size: 14px; font-weight: 700; }
.text-btn span { color: var(--orange); padding-left: 8px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin: 34px 0 0; padding: 0; list-style: none; }
.hero-tags li { padding: 8px 12px; color: #5f6b73; background: #fff; border: 1px solid var(--line); border-radius: 99px; font-size: 13px; }

.hero-visual {
  position: relative;
  min-height: 470px;
  overflow: hidden;
  background: #1a2329;
  border-radius: 2px 48px 2px 48px;
  box-shadow: 0 26px 70px rgba(22, 31, 37, .16);
}
.visual-grid {
  position: absolute;
  inset: 0;
  opacity: .13;
  background-image: linear-gradient(rgba(255,255,255,.4) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.4) 1px, transparent 1px);
  background-size: 38px 38px;
  transform: perspective(300px) rotateX(18deg) scale(1.12);
}
.water-core {
  position: absolute;
  left: 50%; top: 50%;
  width: 190px; height: 190px;
  transform: translate(-50%, -50%);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #fff;
  background: radial-gradient(circle at 38% 30%, #ff9853, var(--orange) 48%, #a83900);
  border-radius: 52% 48% 44% 56%;
  box-shadow: 0 0 0 18px rgba(239,108,26,.08), 0 0 60px rgba(239,108,26,.35);
}
.water-core span { font-size: 9px; line-height: 1.35; letter-spacing: .18em; text-align: center; opacity: .75; }
.water-core strong { margin: 8px 0 2px; font-size: 42px; line-height: 1; }
.water-core small { font-size: 12px; }
.orbit { position: absolute; left: 50%; top: 50%; border: 1px solid rgba(255,255,255,.19); border-radius: 50%; transform: translate(-50%, -50%) rotate(-16deg); }
.orbit::before { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: #ff9b59; box-shadow: 0 0 13px #ff7d26; }
.orbit-a { width: 330px; height: 230px; }
.orbit-a::before { top: 26px; right: 62px; }
.orbit-b { width: 430px; height: 340px; transform: translate(-50%, -50%) rotate(27deg); }
.orbit-b::before { bottom: 45px; left: 63px; }
.signal-card {
  position: absolute;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 15px;
  color: #fff;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.13);
  backdrop-filter: blur(8px);
}
.signal-card b { color: #ff9a54; font-size: 11px; }
.signal-card span { font-size: 12px; }
.signal-1 { left: 28px; top: 48px; }
.signal-2 { right: 30px; top: 104px; }
.signal-3 { left: 58px; bottom: 48px; }

.section { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 88px 0; }
.section-head { display: flex; align-items: flex-start; justify-content: flex-start; flex-direction: column; gap: 16px; margin-bottom: 38px; }
.section-head > div { max-width: 920px; }
.section-head h2 { margin: 10px 0 0; font-size: clamp(28px, 4vw, 44px); letter-spacing: -.035em; }
.section-head > p { max-width: 780px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.products-section { border-top: 1px solid var(--line); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.product-card {
  position: relative;
  min-height: 480px;
  padding: 24px;
  overflow: hidden;
  background: #fff;
  border: 1px solid #e6eaec;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.product-card:hover { transform: translateY(-8px); border-color: #f3c7a9; box-shadow: 0 22px 50px rgba(27,35,40,.09); }
.product-top { display: flex; justify-content: space-between; color: #7a858c; font-size: 12px; }
.product-top b { color: #d9dee1; font-size: 22px; }
.product-card h3 { margin: 22px 0 3px; font-size: 30px; letter-spacing: -.04em; }
.product-card h4 { margin: 0; font-size: 15px; }
.product-card > p { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.card-link { position: absolute; left: 24px; bottom: 24px; color: var(--orange); font-size: 13px; font-weight: 800; }
.device { position: relative; height: 190px; margin: 23px 0 10px; background: linear-gradient(145deg, #f4f5f5, #e9edee); }
.device.product-photo { display:flex; align-items:center; justify-content:center; padding:10px; background:#f7f8f8; }
.device.product-photo img { width:100%; height:100%; object-fit:contain; mix-blend-mode:multiply; }
.device::before, .device::after, .device i { content: ""; position: absolute; display: block; }
.device-mini::before { width: 72px; height: 120px; left: 50%; top: 27px; transform: translateX(-50%); background: #fafafa; border: 3px solid #59636a; box-shadow: 10px 9px 0 #cdd3d5; }
.device-mini::after { width: 47px; height: 29px; left: 50%; top: 42px; transform: translateX(-50%); background: #202b31; border-bottom: 4px solid var(--orange); }
.device-mini i:nth-child(1) { width: 12px; height: 52px; left: calc(50% - 54px); bottom: 23px; border: 4px solid #68727a; border-radius: 10px; }
.device-mini i:nth-child(2), .device-mini i:nth-child(3) { width: 16px; height: 42px; bottom: 24px; border: 3px solid #68727a; border-radius: 10px; }
.device-mini i:nth-child(2) { left: calc(50% + 33px); } .device-mini i:nth-child(3) { left: calc(50% + 57px); }
.device-mid::before { width: 118px; height: 122px; left: 50%; top: 27px; transform: translateX(-50%); background: #f7f8f8; border: 3px solid #59636a; box-shadow: 12px 10px 0 #cdd3d5; }
.device-mid::after { width: 66px; height: 36px; left: 50%; top: 40px; transform: translateX(-50%); background: #172027; border-bottom: 5px solid var(--orange); }
.device-mid i:nth-child(1), .device-mid i:nth-child(2) { width: 20px; height: 58px; bottom: 16px; border: 4px solid #69747a; border-radius: 11px; }
.device-mid i:nth-child(1) { left: calc(50% - 80px); } .device-mid i:nth-child(2) { right: calc(50% - 80px); }
.device-cabinet::before { width: 108px; height: 150px; left: 50%; top: 14px; transform: translateX(-50%); background: #f7f8f8; border: 3px solid #566168; box-shadow: 13px 10px 0 #cdd3d5; }
.device-cabinet::after { width: 73px; height: 45px; left: 50%; top: 34px; transform: translateX(-50%); background: #1c282e; border-bottom: 5px solid var(--orange); }
.device-cabinet i:nth-child(1) { width: 78px; height: 26px; left: 50%; bottom: 38px; transform: translateX(-50%); border: 2px solid #aeb6ba; }
.device-analyzer::before { width: 110px; height: 142px; left: 50%; top: 18px; transform: translateX(-50%); background: #f7f8f8; border: 3px solid #566168; box-shadow: 12px 9px 0 #cdd3d5; }
.device-analyzer::after { width: 68px; height: 48px; left: 50%; top: 34px; transform: translateX(-50%); background: #1b282e; border-bottom: 4px solid var(--orange); }
.device-analyzer i:nth-child(1), .device-analyzer i:nth-child(2), .device-analyzer i:nth-child(3) { width: 17px; height: 36px; top: 99px; border: 2px solid #778188; border-radius: 3px; }
.device-analyzer i:nth-child(1) { left: calc(50% - 31px); } .device-analyzer i:nth-child(2) { left: calc(50% - 9px); } .device-analyzer i:nth-child(3) { left: calc(50% + 13px); }

.platform-section { color: #fff; background: #172027; }
.platform-inner { width: min(calc(100% - 48px), var(--max)); min-height: 720px; margin: 0 auto; display: grid; grid-template-columns: .94fr 1.06fr; align-items: center; gap: 74px; padding: 96px 0; }
.platform-copy h2 { margin: 15px 0 22px; font-size: clamp(34px,4.4vw,54px); line-height: 1.18; letter-spacing: -.045em; }
.platform-copy>p { max-width: 580px; margin: 0; color: #b8c2c7; font-size: 16px; line-height: 1.9; }
.platform-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 34px; }
.platform-points>div { min-height: 142px; padding: 20px; background: #202b31; border: 1px solid #37434a; border-radius: 16px; }
.platform-points b { display: block; color: #ff8d46; font-size: 12px; }.platform-points span { display: block; margin-top: 13px; font-size: 16px; font-weight: 800; }.platform-points small { display: block; margin-top: 6px; color: #aab5ba; font-size: 13px; line-height: 1.6; }
.platform-visual { position: relative; min-height: 560px; }
.command-screen { position: absolute; z-index: 2; left: 5%; right: 7%; top: 78px; min-height: 390px; padding: 24px; overflow: hidden; background: linear-gradient(145deg,#10181d,#1d2a31); border: 1px solid #3b4a52; border-radius: 22px; box-shadow: 0 30px 70px rgba(0,0,0,.28); }
.command-screen:before { content:""; position:absolute; inset:0; opacity:.1; background-image:linear-gradient(rgba(255,255,255,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.3) 1px,transparent 1px); background-size:32px 32px; }
.command-screen header,.screen-metrics,.screen-chart,.screen-projects { position:relative; z-index:2; }
.command-screen header { display:flex; align-items:center; gap:11px; color:#fff; }.command-screen header>span { width:9px; height:9px; background:#27cf86; border-radius:50%; box-shadow:0 0 12px rgba(39,207,134,.7); }.command-screen header b { font-size:14px; }.command-screen header small { margin-left:auto; color:#27cf86; font-size:10px; letter-spacing:.12em; }
.screen-metrics { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:24px; }.screen-metrics>span { padding:15px; background:rgba(255,255,255,.045); border:1px solid rgba(255,255,255,.08); border-radius:11px; }.screen-metrics b { display:block; color:#ff8e47; font-size:24px; }.screen-metrics small { display:block; margin-top:4px; color:#9eabb1; font-size:11px; }
.screen-chart { height:142px; display:flex; align-items:flex-end; gap:11px; margin:20px 0 16px; padding:20px 18px 0; border-left:1px solid #3a4750; border-bottom:1px solid #3a4750; }.screen-chart i { flex:1; height:46%; background:linear-gradient(#ff9451,#c64a08); border-radius:5px 5px 0 0; opacity:.9; }.screen-chart i:nth-child(2){height:68%}.screen-chart i:nth-child(3){height:55%}.screen-chart i:nth-child(4){height:83%}.screen-chart i:nth-child(5){height:72%}.screen-chart i:nth-child(6){height:92%}.screen-chart i:nth-child(7){height:78%}
.screen-projects { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; }.screen-projects span { padding:9px 10px; color:#9fb0b8; background:#243139; border-radius:8px; font-size:11px; text-align:center; }.screen-projects span:before { content:""; display:inline-block; width:6px; height:6px; margin-right:6px; background:#2fd28b; border-radius:50%; }.screen-projects .warning:before { background:#ff8d46; }
.terminal,.cloud-node { position:absolute; z-index:4; display:flex; flex-direction:column; align-items:center; justify-content:center; color:#fff; background:#26343b; border:1px solid #4a5b63; box-shadow:0 18px 38px rgba(0,0,0,.22); }.terminal b,.cloud-node b { color:#ff9655; font-size:17px; }.terminal span,.cloud-node span { margin-top:3px; color:#b9c4c9; font-size:11px; }
.terminal-phone { width:92px; height:142px; right:0; bottom:10px; border-radius:18px; }.terminal-phone:before { content:""; position:absolute; inset:9px 8px 20px; border:1px solid #5b6a71; border-radius:10px; }
.terminal-pc { width:142px; height:96px; left:0; bottom:27px; border-radius:12px; }.terminal-pc:after { content:""; position:absolute; left:50%; bottom:-17px; width:54px; height:17px; border-top:3px solid #65747b; transform:translateX(-50%); }
.cloud-node { width:144px; height:82px; right:24px; top:7px; border-color:#825033; border-radius:50%; background:#2a2522; }

.value-panel { display: grid; grid-template-columns: 1.1fr .9fr; min-height: 470px; color: #fff; background: #172027; }
.value-copy { padding: 66px; }
.eyebrow.light { color: #ff9b58; }
.value-copy h2 { margin: 16px 0 22px; font-size: clamp(30px, 4vw, 48px); line-height: 1.25; }
.value-copy p { max-width: 560px; color: #b8c0c5; line-height: 1.9; font-size: 14px; }
.outline-btn { display: inline-flex; margin-top: 26px; padding: 13px 20px; color: #fff; border: 1px solid #5d676d; font-size: 13px; font-weight: 700; }
.value-metrics { display: grid; grid-template-columns: 1fr 1fr; border-left: 1px solid #384249; }
.value-metrics div { display: flex; flex-direction: column; justify-content: center; padding: 38px; border-bottom: 1px solid #384249; border-right: 1px solid #384249; }
.value-metrics strong { color: #ff8b40; font-size: 46px; line-height: 1; }
.value-metrics sup { font-size: 18px; }
.value-metrics span { margin-top: 14px; color: #b9c2c7; font-size: 13px; line-height: 1.65; }

.channel-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr 1fr; gap: 14px; }
.channel-card { min-height: 208px; padding: 22px; background: #fff; border: 1px solid var(--line); }
.channel-card img { width: 110px; height: 110px; padding: 4px; object-fit: cover; border: 1px solid #e2e6e8; }
.channel-card div { margin-top: 18px; }
.channel-card span { color: var(--orange); font-size: 10px; font-weight: 800; letter-spacing: .09em; }
.channel-card h3 { margin: 6px 0 5px; font-size: 15px; }
.channel-card p { margin: 0; color: var(--muted); font-size: 13px; }
.featured-channel { display: grid; grid-template-columns: 122px 1fr; align-items: center; gap: 14px; background: #f0f2f2; }
.featured-channel img { width: 122px; height: 122px; }
.featured-channel div { margin: 0; }
.featured-channel h3 { font-size: 18px; }
.site-footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 52px; padding: 46px max(24px, calc((100vw - var(--max))/2)); color: #fff; background: #151d22; }
.footer-logo { padding:8px 12px; background:#fff; border-radius:2px; }
.footer-logo img { width:180px; height:31px; }
.brand.inverse small { color: #839097; }
.site-footer > div:nth-child(2) { display: flex; flex-direction: column; gap: 7px; font-size: 13px; }
.site-footer > div:nth-child(2) span { color: #89949a; font-size: 11px; }
.footer-contact { display: flex; flex-direction: column; align-items: end; gap: 5px; }
.footer-contact a:first-child { color: #ff8e45; font-size: 20px; font-weight: 800; }
.footer-contact a:last-child { color: #a6b0b5; font-size: 11px; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.back-to-top { position: fixed; z-index: 80; right: 24px; bottom: 24px; width: 52px; height: 52px; display: grid; place-items: center; padding: 0; color: #fff; background: var(--orange); border: 0; border-radius: 50%; box-shadow: 0 12px 30px rgba(25,34,39,.23); opacity: 0; pointer-events: none; transform: translateY(14px); transition: opacity .25s, transform .25s, background .2s; cursor: pointer; }
.back-to-top span { font-size: 25px; line-height: 1; transform: translateY(-1px); }
.back-to-top:hover { background: var(--orange-dark); }
.back-to-top:focus-visible { outline: 3px solid rgba(239,108,26,.28); outline-offset: 4px; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }

@media (max-width: 980px) {
  .desktop-nav { gap: 16px; }.desktop-nav a:not(.nav-cta) { display:none; }
  .hero { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { min-height: 420px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .channel-grid { grid-template-columns: 1fr 1fr; }
  .value-panel { grid-template-columns: 1fr; }
  .value-metrics { border-left: 0; border-top: 1px solid #384249; }
  .platform-inner { grid-template-columns:1fr; gap:35px; }.platform-visual{min-height:590px}
}
@media (max-width: 680px) {
  .site-header { width: calc(100% - 28px); min-height: 68px; }
  .desktop-nav { gap:8px; }
  .nav-cta { min-height: 38px; padding: 0 15px; font-size: 12px; }
  .brand strong { font-size: 18px; }
  .brand-mark { width: 32px; height: 32px; border-width: 6px; }
  .official-site-brand img { width:158px; height:31px; }
  .hero, .section { width: calc(100% - 28px); }
  .hero { min-height: 0; padding: 58px 0 60px; }
  .hero h1 { font-size: 42px; }
  .hero-copy > p { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-visual { min-height: 370px; }
  .water-core { width: 155px; height: 155px; }
  .orbit-a { width: 270px; height: 190px; }
  .orbit-b { width: 360px; height: 290px; }
  .signal-2 { right: 14px; }
  .section { padding: 66px 0; }
  .section-head { gap: 14px; }
  .product-grid, .channel-grid { grid-template-columns: 1fr; }
  .product-card { min-height: 460px; }
  .value-copy { padding: 38px 26px; }
  .value-metrics { grid-template-columns: 1fr; }
  .value-metrics div { min-height: 150px; }
  .platform-inner { width:calc(100% - 28px); padding:72px 0; }.platform-points{grid-template-columns:1fr}.platform-visual{min-height:500px}.command-screen{left:0;right:0;top:60px;padding:17px}.screen-metrics{grid-template-columns:1fr 1fr}.screen-metrics>span:last-child{display:none}.screen-chart{height:125px}.screen-projects{grid-template-columns:1fr}.screen-projects span:nth-child(2),.screen-projects span:nth-child(3){display:none}.terminal-pc{width:110px}.terminal-phone{width:76px;height:122px}.cloud-node{right:8px;width:122px;height:70px}
  .featured-channel { grid-template-columns: 100px 1fr; }
  .featured-channel img { width: 100px; height: 100px; }
  .site-footer { grid-template-columns: 1fr; gap: 26px; }
  .footer-contact { align-items: start; }
  .back-to-top { right: 14px; bottom: 14px; width: 46px; height: 46px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}