/* 航天绘景官网 —— 深空蓝黑底 + 海洋青主色，琥珀色仅用于重点标记 */
:root {
  --bg: #030712;
  --bg-alt: #050c1a;
  --line: rgba(148, 190, 255, .12);
  --line-strong: rgba(148, 190, 255, .24);
  --text: #e8f0fb;
  --text-2: #9fb0c8;
  --text-3: #6b7d96;
  --cyan: #38d9f5;
  --blue: #3b82f6;
  --violet: #7c5cff;
  --amber: #ffb547;
  --radius: 12px;
  --header-h: 72px;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.75 var(--sans); -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg, canvas { display: block; max-width: 100%; }
em { font-style: normal; color: var(--cyan); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.container { width: min(1200px, 100% - 40px); margin-left: auto; margin-right: auto; }
.muted { color: var(--text-2); }
.icon { width: 1.25em; height: 1.25em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.grad { background: linear-gradient(90deg, var(--cyan), var(--blue) 55%, var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* 四角取景框 */
.brackets { position: relative; }
.brackets::before {
  content: ""; position: absolute; top: 0; right: 0; bottom: 0; left: 0; pointer-events: none;
  --c: linear-gradient(rgba(56, 217, 245, .55), rgba(56, 217, 245, .55));
  background:
    var(--c) top left / 20px 1px, var(--c) top left / 1px 20px,
    var(--c) top right / 20px 1px, var(--c) top right / 1px 20px,
    var(--c) bottom left / 20px 1px, var(--c) bottom left / 1px 20px,
    var(--c) bottom right / 20px 1px, var(--c) bottom right / 1px 20px;
  background-repeat: no-repeat;
}

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 26px; border: 1px solid transparent; border-radius: 999px; font-size: 15px; font-weight: 600; transition: background .2s, color .2s, border-color .2s; }
.btn .icon { transition: transform .2s; }
.btn:hover .icon { transform: translateX(3px); }
.btn-primary { background: var(--cyan); color: #02121a; box-shadow: 0 0 28px rgba(56, 217, 245, .3); }
.btn-primary:hover { background: #7ce9fb; }
.btn-ghost { border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-sm { height: 36px; padding: 0 18px; font-size: 14px; }

/* 顶栏 */
.header { position: fixed; top: 0; right: 0; left: 0; z-index: 10; border-bottom: 1px solid transparent; transition: background .3s, border-color .3s; }
.header.is-scrolled, .header.is-open { background: rgba(3, 7, 18, .82); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); border-color: var(--line); }
.header-inner { display: flex; align-items: center; height: var(--header-h); }
.brand { display: inline-flex; flex-direction: column; line-height: 1.15; }
.brand b { font-size: 20px; letter-spacing: .14em; }
.brand small { margin-top: 5px; font: 600 10px/1 var(--mono); letter-spacing: .4em; color: var(--cyan); }
.nav { display: flex; align-items: center; gap: 32px; margin-left: auto; }
.nav a:not(.btn) { position: relative; font-size: 15px; color: var(--text-2); transition: color .2s; }
.nav a:not(.btn):hover, .nav a.is-active { color: var(--text); }
.nav a.is-active::after { content: ""; position: absolute; left: 50%; bottom: -10px; width: 4px; height: 4px; margin-left: -2px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.nav-toggle { display: none; margin-left: auto; width: 44px; height: 44px; place-items: center; border: 0; background: none; color: var(--text); font-size: 22px; cursor: pointer; }

/* 首屏 */
.hero { position: relative; isolation: isolate; display: flex; align-items: center; min-height: 100vh; min-height: 100svh; padding: calc(var(--header-h) + 32px) 0 112px; overflow: hidden; }
.hero::before { /* 星空：随机星点平铺（640px 一块） */
  content: ""; position: absolute; top: 0; right: 0; bottom: 0; left: 0; z-index: -2;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='640' height='640'%3E%3Ccircle cx='207' cy='97' r='1.1' fill='%23fff' opacity='0.28'/%3E%3Ccircle cx='60' cy='373' r='0.9' fill='%239ef0ff' opacity='0.39'/%3E%3Ccircle cx='268' cy='154' r='0.9' fill='%23fff' opacity='0.53'/%3E%3Ccircle cx='79' cy='143' r='1.1' fill='%239ef0ff' opacity='0.63'/%3E%3Ccircle cx='375' cy='32' r='0.6' fill='%23fff' opacity='0.28'/%3E%3Ccircle cx='185' cy='92' r='0.5' fill='%23fff' opacity='0.62'/%3E%3Ccircle cx='436' cy='66' r='0.9' fill='%23fff' opacity='0.67'/%3E%3Ccircle cx='351' cy='40' r='0.5' fill='%23fff' opacity='0.65'/%3E%3Ccircle cx='340' cy='497' r='0.8' fill='%23fff' opacity='0.63'/%3E%3Ccircle cx='192' cy='508' r='1.1' fill='%239ef0ff' opacity='0.76'/%3E%3Ccircle cx='192' cy='317' r='0.7' fill='%23fff' opacity='0.72'/%3E%3Ccircle cx='627' cy='76' r='0.8' fill='%23fff' opacity='0.36'/%3E%3Ccircle cx='597' cy='270' r='1.1' fill='%23fff' opacity='0.3'/%3E%3Ccircle cx='505' cy='524' r='0.7' fill='%23fff' opacity='0.7'/%3E%3Ccircle cx='371' cy='292' r='1.3' fill='%23fff' opacity='0.31'/%3E%3Ccircle cx='446' cy='42' r='1.1' fill='%23fff' opacity='0.71'/%3E%3Ccircle cx='636' cy='526' r='0.7' fill='%23fff' opacity='0.72'/%3E%3Ccircle cx='222' cy='602' r='0.7' fill='%239ef0ff' opacity='0.36'/%3E%3Ccircle cx='38' cy='492' r='0.6' fill='%23fff' opacity='0.73'/%3E%3Ccircle cx='587' cy='318' r='0.6' fill='%23fff' opacity='0.54'/%3E%3Ccircle cx='565' cy='524' r='1.3' fill='%23fff' opacity='0.61'/%3E%3Ccircle cx='631' cy='437' r='0.8' fill='%239ef0ff' opacity='0.87'/%3E%3Ccircle cx='113' cy='148' r='0.6' fill='%23fff' opacity='0.26'/%3E%3Ccircle cx='117' cy='180' r='0.6' fill='%23fff' opacity='0.52'/%3E%3Ccircle cx='362' cy='610' r='1.1' fill='%23fff' opacity='0.81'/%3E%3Ccircle cx='419' cy='473' r='0.8' fill='%23fff' opacity='0.83'/%3E%3Ccircle cx='560' cy='511' r='0.8' fill='%23fff' opacity='0.51'/%3E%3Ccircle cx='308' cy='256' r='0.6' fill='%23fff' opacity='0.29'/%3E%3Ccircle cx='104' cy='218' r='0.5' fill='%23fff' opacity='0.32'/%3E%3Ccircle cx='343' cy='607' r='0.9' fill='%23fff' opacity='0.27'/%3E%3Ccircle cx='393' cy='95' r='0.7' fill='%23fff' opacity='0.87'/%3E%3Ccircle cx='303' cy='74' r='0.8' fill='%23fff' opacity='0.9'/%3E%3Ccircle cx='310' cy='55' r='0.5' fill='%23fff' opacity='0.74'/%3E%3Ccircle cx='306' cy='443' r='0.9' fill='%23fff' opacity='0.27'/%3E%3Ccircle cx='338' cy='94' r='0.9' fill='%23fff' opacity='0.84'/%3E%3Ccircle cx='191' cy='411' r='0.5' fill='%23fff' opacity='0.7'/%3E%3Ccircle cx='235' cy='107' r='1.3' fill='%23fff' opacity='0.39'/%3E%3Ccircle cx='322' cy='407' r='0.9' fill='%23fff' opacity='0.78'/%3E%3Ccircle cx='546' cy='516' r='1.3' fill='%23fff' opacity='0.51'/%3E%3Ccircle cx='128' cy='315' r='1.1' fill='%239ef0ff' opacity='0.27'/%3E%3Ccircle cx='179' cy='166' r='1.1' fill='%23fff' opacity='0.64'/%3E%3Ccircle cx='517' cy='463' r='0.7' fill='%23fff' opacity='0.87'/%3E%3Ccircle cx='141' cy='145' r='0.6' fill='%23fff' opacity='0.47'/%3E%3Ccircle cx='631' cy='391' r='0.5' fill='%23fff' opacity='0.56'/%3E%3Ccircle cx='512' cy='54' r='1.1' fill='%23fff' opacity='0.33'/%3E%3Ccircle cx='455' cy='128' r='0.6' fill='%23fff' opacity='0.53'/%3E%3Ccircle cx='56' cy='606' r='1.1' fill='%23fff' opacity='0.51'/%3E%3Ccircle cx='606' cy='464' r='0.6' fill='%239ef0ff' opacity='0.9'/%3E%3Ccircle cx='378' cy='298' r='1.1' fill='%23fff' opacity='0.35'/%3E%3Ccircle cx='627' cy='421' r='0.7' fill='%23fff' opacity='0.35'/%3E%3Ccircle cx='14' cy='512' r='1.1' fill='%23fff' opacity='0.67'/%3E%3Ccircle cx='598' cy='278' r='1.3' fill='%23fff' opacity='0.38'/%3E%3Ccircle cx='18' cy='136' r='0.9' fill='%23fff' opacity='0.41'/%3E%3Ccircle cx='166' cy='268' r='0.6' fill='%23fff' opacity='0.29'/%3E%3Ccircle cx='575' cy='424' r='1.3' fill='%23fff' opacity='0.84'/%3E%3Ccircle cx='587' cy='321' r='0.9' fill='%23fff' opacity='0.35'/%3E%3C/svg%3E") 0 0 / 640px 640px;
}
.hero::after { /* 光晕 + 网格 */
  content: ""; position: absolute; top: 0; right: 0; bottom: 0; left: 0; z-index: -1;
  background:
    radial-gradient(ellipse 45% 60% at 74% 50%, rgba(59, 130, 246, .16), transparent 70%),
    linear-gradient(rgba(148, 190, 255, .05) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(90deg, rgba(148, 190, 255, .05) 1px, transparent 1px) 0 0 / 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 45%, #000 30%, transparent 80%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 45%, #000 30%, transparent 80%);
}
.hero-copy, .globe { animation: rise 1s ease both; }
.globe { animation-delay: .2s; }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); align-items: center; gap: 40px; }
.chip { display: inline-flex; align-items: center; gap: 10px; padding: 6px 14px; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(3, 7, 18, .6); font: 500 12px/1.4 var(--mono); letter-spacing: .12em; color: var(--text-2); }
.pulse, .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; color: var(--cyan); animation: ping 2s infinite; }
.pulse { width: 6px; height: 6px; }
@keyframes ping { from { box-shadow: 0 0 0 0 currentColor; } to { box-shadow: 0 0 0 9px transparent; } }
.hero h1 { margin: 28px 0 24px; font-size: clamp(40px, 5.4vw, 76px); line-height: 1.2; font-weight: 700; letter-spacing: .04em; }
.hero-lead { max-width: 30em; font-size: 18px; color: var(--text-2); }
.actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 56px; font: 12px/1 var(--mono); letter-spacing: .14em; color: var(--text-3); }
.hero-meta span::before { content: ""; display: inline-block; width: 5px; height: 5px; margin-right: 10px; vertical-align: 2px; background: var(--amber); }

.globe { position: relative; justify-self: end; width: 100%; max-width: 640px; aspect-ratio: 1; }
.globe canvas { width: 100%; height: 100%; }
.hud { position: absolute; font: 500 11px/1 var(--mono); letter-spacing: .16em; color: var(--text-3); }
.hud b { font-weight: 500; color: var(--cyan); }
.hud-tl { top: 6px; left: 30px; }
.hud-br { right: 30px; bottom: 6px; }

.scroll-cue { position: absolute; left: 50%; bottom: 24px; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 10px; font: 11px/1 var(--mono); letter-spacing: .3em; color: var(--text-3); }
.scroll-cue::after { content: ""; width: 1px; height: 44px; background: linear-gradient(transparent, var(--cyan), transparent) 0 -22px / 1px 22px no-repeat, var(--line); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { to { background-position: 0 44px, 0 0; } }

/* 实力数据带 */
.band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-alt); }
.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); }
.stats div { display: flex; flex-direction: column-reverse; align-items: center; padding: 32px 16px; background: var(--bg-alt); }

/* 通用区块 */
.section { position: relative; padding: clamp(80px, 10vw, 136px) 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 56px; }
.eyebrow { display: flex; align-items: center; gap: 12px; font: 500 12px/1 var(--mono); letter-spacing: .24em; text-transform: uppercase; color: var(--cyan); }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }
h2 { margin: 18px 0 14px; font-size: clamp(30px, 3.6vw, 46px); line-height: 1.25; font-weight: 700; letter-spacing: .04em; }
.lead { font-size: 17px; color: var(--text-2); }

/* 核心技术 */
.tech { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 56px; align-items: start; }
.tech-tabs { display: flex; flex-direction: column; border-left: 1px solid var(--line); }
.tech-tabs button { position: relative; display: grid; grid-template-columns: 40px 1fr; column-gap: 10px; padding: 18px 20px 18px 24px; border: 0; background: none; color: var(--text-2); font: inherit; text-align: left; cursor: pointer; transition: color .2s, background .2s; }
.tech-tabs button:hover { color: var(--text); }
.tech-tabs .num { grid-row: span 2; font: 500 13px/1.9 var(--mono); color: var(--text-3); }
.tech-tabs b { font-size: 18px; font-weight: 600; }
.tech-tabs small { font: 11px/1.6 var(--mono); color: var(--text-3); }
.tech-tabs [aria-selected="true"] { color: var(--text); background: linear-gradient(90deg, rgba(56, 217, 245, .12), transparent 85%); }
.tech-tabs [aria-selected="true"] .num { color: var(--cyan); }
.tech-tabs [aria-selected="true"]::before { content: ""; position: absolute; top: 0; bottom: 0; left: -1px; width: 2px; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.tech-panel:not([hidden]) { animation: rise .5s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }
.tech-panel h3 { margin: 32px 0 10px; font-size: 24px; }
.tech-panel p { color: var(--text-2); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tags li { padding: 4px 12px; border: 1px solid var(--line-strong); border-radius: 4px; font-size: 13px; color: var(--text-2); }

.screen { border: 1px solid var(--line-strong); border-radius: var(--radius); background: #040b17; overflow: hidden; }
.screen-bar { display: flex; align-items: center; gap: 6px; height: 36px; padding: 0 14px; border-bottom: 1px solid var(--line); font: 11px/1 var(--mono); letter-spacing: .2em; color: var(--text-3); }
.screen-bar i { width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); }
.screen-bar i:nth-of-type(3) { margin-right: 10px; }
.screen-body {
  position: relative; display: grid; place-items: center; aspect-ratio: 16 / 9; overflow: hidden;
  background:
    radial-gradient(circle, rgba(56, 217, 245, .14), transparent 55%),
    linear-gradient(rgba(148, 190, 255, .07) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, rgba(148, 190, 255, .07) 1px, transparent 1px) 0 0 / 32px 32px;
}
.screen-body .icon { width: 88px; height: 88px; stroke-width: .9; color: var(--cyan); filter: drop-shadow(0 0 16px rgba(56, 217, 245, .5)); }
.screen-body img { width: 100%; height: 100%; object-fit: cover; }
.placeholder::before { /* 无截图时的雷达扫描 */
  content: ""; position: absolute; height: 84%; aspect-ratio: 1; border-radius: 50%; border: 1px solid rgba(56, 217, 245, .3);
  background:
    repeating-radial-gradient(circle, transparent 0 calc(20% - 1px), rgba(56, 217, 245, .16) calc(20% - 1px) 20%),
    conic-gradient(transparent 78%, rgba(56, 217, 245, .35));
  animation: sweep 4s linear infinite;
}
@keyframes sweep { to { transform: rotate(1turn); } }

@supports not (aspect-ratio: 1) { .screen-body { min-height: 240px; } } /* 旧内核（Chromium < 88） */

/* 解决方案 */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { position: relative; padding: 28px 24px 26px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(180deg, rgba(148, 190, 255, .035), transparent); transition: border-color .3s, background .3s, transform .3s; }
.card:hover { border-color: rgba(56, 217, 245, .45); background: linear-gradient(180deg, rgba(56, 217, 245, .08), transparent); transform: translateY(-4px); }
.card .icon { width: 36px; height: 36px; stroke-width: 1.3; color: var(--cyan); }
.card .idx { position: absolute; top: 22px; right: 22px; font: 11px/1 var(--mono); letter-spacing: .12em; color: var(--text-3); }
.card h3 { margin: 28px 0 8px; font-size: 18px; line-height: 1.45; }
.card p { font-size: 14px; line-height: 1.7; color: var(--text-2); }
.cta { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 24px; padding: 32px 40px; border: 1px solid rgba(56, 217, 245, .3); border-radius: var(--radius); background: linear-gradient(100deg, rgba(56, 217, 245, .12), rgba(59, 130, 246, .05) 60%, transparent); }
.cta h3 { font-size: 22px; }
.cta p { margin-top: 4px; color: var(--text-2); }

/* 关于我们 */
.about { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 72px; align-items: center; }
.about p + p { margin-top: 16px; }
.motto { margin: 4px 0 28px; font-size: clamp(20px, 2vw, 26px); line-height: 1.6; font-weight: 600; color: var(--text); }
.stations { padding: 28px; border-radius: var(--radius); background: rgba(148, 190, 255, .03); }
.stations-head { display: flex; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px dashed var(--line-strong); font: 11px/1 var(--mono); letter-spacing: .2em; color: var(--text-3); }
.stations li { display: grid; grid-template-columns: 16px 1fr auto; column-gap: 12px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); }
.stations li:last-child { padding-bottom: 0; border-bottom: 0; }
.stations .dot { grid-row: span 2; }
.stations .dot-amber { color: var(--amber); }
.stations span { grid-column: 2; font: 11px/1.4 var(--mono); letter-spacing: .14em; color: var(--text-3); }
.stations code { grid-column: 3; grid-row: 1 / 3; font: 12px/1 var(--mono); color: var(--cyan); }
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 72px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); overflow: hidden; }
.pillars li { padding: 28px 24px; background: var(--bg); transition: background .3s; }
.pillars li:hover { background: #06101f; }
.pillars span { font: 12px/1 var(--mono); letter-spacing: .14em; color: var(--cyan); }
.pillars b { display: block; margin: 18px 0 6px; font-size: 18px; }
.pillars p { font-size: 14px; color: var(--text-2); }
.stats dd { font: 600 clamp(30px, 3.4vw, 44px)/1.1 var(--mono); }
.stats sup { margin-left: 2px; font-size: .5em; vertical-align: top; color: var(--cyan); }
.stats dt { margin-top: 10px; font-size: 14px; color: var(--text-2); }
.certs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 16px; }
.certs li { display: flex; align-items: center; gap: 14px; padding: 20px 24px; border: 1px solid var(--line); border-radius: var(--radius); font-weight: 600; }
.certs .icon { width: 28px; height: 28px; stroke-width: 1.4; color: var(--amber); }

/* 合作伙伴 */
.partners { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 72px; align-items: center; }
.partners p + p { margin-top: 16px; }
.partner-groups { display: grid; gap: 28px; }
.partner-groups p { margin-bottom: 12px; font: 12px/1 var(--mono); letter-spacing: .2em; color: var(--text-3); }
.partner-groups ul { display: flex; flex-wrap: wrap; gap: 10px; }
.partner-groups li { padding: 10px 18px; border: 1px solid var(--line); border-radius: 8px; background: rgba(148, 190, 255, .03); transition: border-color .2s, color .2s; }
.partner-groups li:hover { border-color: rgba(56, 217, 245, .45); color: var(--cyan); }

/* 联系我们 */
.contacts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.contacts li { display: grid; grid-template-columns: auto 1fr; column-gap: 16px; align-items: center; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); }
.contacts .icon { grid-row: span 2; width: 44px; height: 44px; padding: 11px; border-radius: 50%; background: rgba(56, 217, 245, .1); color: var(--cyan); }
.contacts span { font-size: 13px; color: var(--text-3); }
.contacts b { font-weight: 600; }

/* 页脚 */
.footer { padding-top: 56px; border-top: 1px solid var(--line); background: #02050d; font-size: 14px; color: var(--text-2); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px 40px; padding-bottom: 40px; }
.footer-inner p { margin-top: 16px; }
.footer-nav { display: flex; flex-wrap: wrap; align-content: start; gap: 12px 32px; }
.footer a:hover { color: var(--cyan); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 20px 0 28px; border-top: 1px solid var(--line); font-size: 13px; color: var(--text-3); }

/* 404 */
.notfound main { display: grid; align-content: center; justify-items: start; gap: 20px; min-height: 100vh; }
.notfound h1 { font-size: clamp(32px, 5vw, 56px); }

/* 风格切换（评审用） */
.style-switch { position: fixed; left: 16px; bottom: 16px; z-index: 20; display: flex; gap: 2px; padding: 4px; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(3, 7, 18, .85); font-size: 12px; }
.style-switch[hidden] { display: none; }
.style-switch a { padding: 5px 12px; border-radius: 999px; color: var(--text-2); }
.style-switch a[aria-current] { background: var(--cyan); color: #02121a; }

/* 滚动显现 */
.js [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.js [data-reveal].is-in { opacity: 1; transform: none; }

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

@media (max-width: 1080px) {
  .tech { grid-template-columns: 1fr; gap: 32px; }
  .tech-tabs { flex-direction: row; overflow-x: auto; border-left: 0; border-bottom: 1px solid var(--line); scrollbar-width: none; }
  .tech-tabs button { display: block; padding: 12px 18px; white-space: nowrap; }
  .tech-tabs .num, .tech-tabs small { display: none; }
  .tech-tabs b { font-size: 15px; }
  .tech-tabs [aria-selected="true"]::before { top: auto; right: 0; bottom: -1px; left: 0; width: auto; height: 2px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .about, .partners { grid-template-columns: 1fr; gap: 40px; }
  .pillars { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav-toggle { display: grid; }
  .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 24px; background: var(--bg); border-bottom: 1px solid var(--line); }
  .header.is-open .nav { display: flex; }
  .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav a.is-active::after { display: none; }
  .nav .btn { margin-top: 20px; }
  .hero-inner { grid-template-columns: 1fr; }
  .globe { justify-self: center; max-width: 460px; }
  .contacts, .certs { grid-template-columns: 1fr; }
  .cta { flex-direction: column; align-items: flex-start; padding: 28px; }
  .scroll-cue { display: none; }
}

@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div:last-child { grid-column: span 2; }
  .pillars { grid-template-columns: 1fr; }
  .hero-lead { font-size: 16px; }
}