/* ==========================================================
   数讯智拓 XUNVIA 官网样式
   品牌色取自 Logo：青色 #21BDCF + 炭黑 #222222
   ========================================================== */
:root {
  --brand: #21bdcf;          /* Logo 青色 */
  --brand-light: #5fd6e3;
  --brand-ink: #0a7f90;      /* 浅底上的青色文字，满足对比度 */
  --charcoal: #222222;       /* Logo 炭黑 */
  --grad: linear-gradient(120deg, #3fd3e3, #17a9bc);
  --grad-text: linear-gradient(120deg, #14aabe, #0a7586);

  /* 浅色主题（默认） */
  --bg: #ffffff;
  --bg-alt: #f3f7f8;
  --card: #ffffff;
  --card-hover: #ffffff;
  --border: #e2e9ec;
  --text: #1c1f22;
  --muted: #5d6870;
  --accent: var(--brand-ink);
  --shadow: 0 1px 2px rgba(16, 24, 28, .04), 0 8px 24px -12px rgba(16, 24, 28, .12);
  --shadow-lg: 0 24px 60px -24px rgba(10, 60, 70, .28);

  --radius: 16px;
  --nav-h: 72px;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

/* 深色区块：重定义变量即可复用全部组件 */
.dark {
  --bg: #16191c;
  --bg-alt: #1c2024;
  --card: rgba(255, 255, 255, .04);
  --card-hover: rgba(255, 255, 255, .07);
  --border: rgba(255, 255, 255, .1);
  --text: #eaf0f2;
  --muted: #9aa6ad;
  --accent: var(--brand);
  --grad-text: linear-gradient(120deg, #6ee2ee, #21bdcf);
  --shadow: none;
  background: var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, svg { display: block; }
button { font: inherit; color: inherit; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ic { width: 18px; height: 18px; flex: none; }
.chip { display: inline-block; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; color: var(--accent); background: rgba(33, 189, 207, .1); border: 1px solid rgba(33, 189, 207, .25); margin-bottom: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-size: 15px; font-weight: 700;
  border: 1px solid transparent; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--grad); color: #08262b; box-shadow: 0 8px 28px -10px rgba(33, 189, 207, .8); }
.btn-primary:hover { box-shadow: 0 14px 36px -10px rgba(33, 189, 207, .9); }
.btn-ghost { border-color: var(--border); background: var(--card); color: var(--text); }
.btn-ghost:hover { border-color: var(--brand); }
.btn-dark { background: var(--charcoal); color: #fff; flex: none; }
.btn-dark:hover { box-shadow: 0 12px 30px -10px rgba(0, 0, 0, .5); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- Brand / Nav ---------- */
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 40px; width: auto; aspect-ratio: 2615 / 523; display: block; }
.footer .brand-logo { height: 48px; }

.nav { position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 100; color: #fff; transition: background .3s, border-color .3s, color .3s; border-bottom: 1px solid transparent; }
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 15px; }
.nav-links a:not(.btn) { color: rgba(255, 255, 255, .72); transition: color .2s; position: relative; }
.nav-links a:not(.btn):hover, .nav-links a.active { color: #fff; }
.nav-links a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; border-radius: 2px; background: var(--brand); }
.nav.scrolled, .nav.menu-open { background: rgba(255, 255, 255, .92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-color: #e2e9ec; color: #1c1f22; }
.nav.scrolled .nav-links a:not(.btn), .nav.menu-open .nav-links a:not(.btn) { color: #5d6870; }
.nav.scrolled .nav-links a:not(.btn):hover, .nav.scrolled .nav-links a.active { color: #1c1f22; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; width: 32px; height: 32px; flex-direction: column; justify-content: center; gap: 6px; }
.nav-toggle span { display: block; height: 2px; background: currentColor; border-radius: 2px; transition: transform .3s, opacity .3s; }

/* ---------- Hero ---------- */
.hero { --mx: 70%; --my: 40%; position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; padding: calc(var(--nav-h) + 32px) 0 80px; background: #121518; }
/* 极光：三块大面积模糊色团缓慢漂移 */
.aurora { position: absolute; inset: -20%; filter: blur(100px); opacity: .32; }
.aurora i { position: absolute; border-radius: 50%; mix-blend-mode: screen; animation: drift 22s ease-in-out infinite alternate; }
.aurora i:nth-child(1) { width: 46vw; height: 46vw; left: 46%; top: 6%; background: #21bdcf; }
.aurora i:nth-child(2) { width: 38vw; height: 38vw; left: 8%; top: 42%; background: #0b5f6c; animation-duration: 28s; animation-delay: -8s; }
.aurora i:nth-child(3) { width: 26vw; height: 26vw; left: 62%; top: 52%; background: #7ae4ef; opacity: .45; animation-duration: 18s; animation-delay: -4s; }
@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-8vw, 6vh) scale(1.15); }
  100% { transform: translate(6vw, -4vh) scale(.9); }
}
/* 网格：底层淡网格 + 鼠标聚光灯照亮的亮网格 */
.hero-gridlines, .hero-spotlight { position: absolute; inset: 0; background-size: 56px 56px; }
.hero-gridlines { background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 20%, transparent 75%); }
.hero-spotlight { background-image: linear-gradient(rgba(95,214,227,.28) 1px, transparent 1px), linear-gradient(90deg, rgba(95,214,227,.28) 1px, transparent 1px); mask-image: radial-gradient(260px circle at var(--mx) var(--my), #000, transparent 100%); -webkit-mask-image: radial-gradient(260px circle at var(--mx) var(--my), #000, transparent 100%); }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(500px circle at var(--mx) var(--my), rgba(33, 189, 207, .1), transparent 70%); z-index: 1; pointer-events: none; }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 160px; background: linear-gradient(transparent, #121518); z-index: 1; pointer-events: none; }
/* 光束：沿网格线流动 */
.beams { position: absolute; inset: 0; mask-image: radial-gradient(ellipse at 50% 40%, #000 25%, transparent 80%); -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 25%, transparent 80%); }
.beams i { position: absolute; overflow: hidden; }
.bv { top: 0; bottom: 0; width: 1px; left: calc(var(--x) * 56px); }
.bh { left: 0; right: 0; height: 1px; top: calc(var(--y) * 56px); }
.beams i::after { content: ""; position: absolute; animation: 7s linear infinite; animation-delay: var(--d); }
.bv::after { left: 0; width: 1px; height: 160px; top: -160px; background: linear-gradient(transparent, #5fd6e3, transparent); animation-name: beamV; }
.bh::after { top: 0; height: 1px; width: 220px; left: -220px; background: linear-gradient(90deg, transparent, #5fd6e3, transparent); animation-name: beamH; animation-duration: 9s; }
@keyframes beamV { to { top: 100%; } }
@keyframes beamH { to { left: 100%; } }

.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1.05fr; gap: 40px; align-items: center; }
.hero-content > * { animation: fadeUp .9s ease both; }
.hero-content > :nth-child(2) { animation-delay: .1s; }
.hero-content > :nth-child(3) { animation-delay: .2s; }
.hero-content > :nth-child(4) { animation-delay: .3s; }
.hero-content > :nth-child(5) { animation-delay: .4s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(28px); } }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; padding: 6px 16px; border: 1px solid var(--border); border-radius: 999px; background: rgba(255,255,255,.04); backdrop-filter: blur(8px); color: var(--brand-light); font-size: 14px; margin-bottom: 28px; }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 0 rgba(33, 189, 207, .6); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(33, 189, 207, 0); } 100% { box-shadow: 0 0 0 0 rgba(33, 189, 207, 0); } }
.hero h1 { font-size: clamp(40px, 6vw, 74px); line-height: 1.15; font-weight: 800; letter-spacing: -1px; margin-bottom: 24px; }
.hero h1 .grad { background: linear-gradient(120deg, #9ef0f7, #21bdcf 60%, #5fd6e3); background-size: 200% auto; -webkit-background-clip: text; background-clip: text; animation: shimmer 4s linear infinite; }
@keyframes shimmer { to { background-position: -200% center; } }
.rotator { display: inline-block; min-width: 4em; color: #fff; position: relative; }
.rotator::after { content: ""; position: absolute; left: 0; right: 0; bottom: .02em; height: .1em; border-radius: 4px; background: linear-gradient(90deg, var(--brand), transparent); box-shadow: 0 0 18px var(--brand); }
.rotator i { font-style: normal; color: var(--brand); text-shadow: 0 0 12px rgba(33, 189, 207, .8); }
.hero-sub { max-width: 560px; font-size: clamp(16px, 1.8vw, 18px); color: var(--muted); margin-bottom: 36px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 56px; }
.magnetic { transition: transform .25s cubic-bezier(.2, .8, .2, 1), box-shadow .2s, border-color .2s; }
.btn-shine { position: relative; overflow: hidden; }
.btn-shine::after { content: ""; position: absolute; top: 0; bottom: 0; width: 60%; left: -80%; background: linear-gradient(100deg, transparent, rgba(255,255,255,.6), transparent); transform: skewX(-20deg); animation: shine 3.2s ease-in-out infinite; }
@keyframes shine { 0%, 55% { left: -80%; } 100% { left: 130%; } }
.stats { display: flex; gap: 48px; flex-wrap: wrap; }
.stat strong { font-size: 38px; font-weight: 800; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--muted); font-size: 14px; margin-left: 2px; }

/* 粒子 Logo 视觉区 */
.hero-visual { position: relative; height: 640px; animation: fadeUp 1s ease .3s both; }
#logoCanvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: crosshair; z-index: 2; }
.logo-glow { position: absolute; left: 56%; top: 33%; width: 380px; height: 380px; transform: translate(-50%, -50%); border-radius: 50%; background: radial-gradient(circle, rgba(33, 189, 207, .35), transparent 65%); filter: blur(20px); animation: breathe 5s ease-in-out infinite; }
@keyframes breathe { 50% { opacity: .55; transform: translate(-50%, -50%) scale(1.12); } }
.orbit-3d { position: absolute; left: 56%; top: 33%; width: 0; height: 0; transform-style: preserve-3d; }
.orbit-3d i { position: absolute; left: -260px; top: -260px; width: 520px; height: 520px; border-radius: 50%; border: 1px solid rgba(33, 189, 207, .22); transform: rotateX(72deg) rotateZ(0); animation: orbitSpin 18s linear infinite; }
.orbit-3d i::before { content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; border-radius: 50%; background: #9ef0f7; box-shadow: 0 0 14px 4px rgba(33, 189, 207, .8); }
.orbit-3d i:nth-child(2) { left: -210px; top: -210px; width: 420px; height: 420px; transform: rotateX(72deg) rotateY(-28deg); animation-duration: 12s; animation-direction: reverse; border-style: dashed; }
.orbit-3d i:nth-child(3) { left: -300px; top: -300px; width: 600px; height: 600px; transform: rotateX(75deg) rotateY(24deg); animation-duration: 26s; border-color: rgba(255,255,255,.07); }
@keyframes orbitSpin { to { rotate: z 360deg; } }
.visual-hint { position: absolute; right: 0; top: 0; z-index: 3; font-size: 12px; letter-spacing: 2px; color: rgba(255,255,255,.35); white-space: nowrap; pointer-events: none; }
.hero-visual .hero-terminal { position: absolute; left: -28px; bottom: 0; width: min(480px, 92%); z-index: 4; transform-style: preserve-3d; transition: transform .1s linear; }
.hero-visual .term-body { height: 236px; font-size: 13px; line-height: 1.85; padding: 16px 20px; }
.tilt::after { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; background: radial-gradient(400px circle at var(--gx, 50%) var(--gy, 0%), rgba(255,255,255,.1), transparent 45%); }
.scroll-cue { position: absolute; left: 50%; bottom: 26px; width: 24px; height: 40px; margin-left: -12px; border: 2px solid rgba(255,255,255,.25); border-radius: 14px; z-index: 3; }
.scroll-cue span { position: absolute; left: 50%; top: 7px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--brand); animation: cue 1.8s infinite; }
@keyframes cue { to { opacity: 0; transform: translateY(14px); } }

/* ---------- Terminal / window chrome ---------- */
.hero-terminal, .demo-window {
  border-radius: 16px; border: 1px solid rgba(255,255,255,.12); background: rgba(18, 21, 24, .88);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.55), 0 0 60px -24px rgba(33, 189, 207, .45);
  overflow: hidden; color: #eaf0f2;
}
.term-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.03); }
.term-bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.term-bar i:nth-child(2) { background: #febc2e; }
.term-bar i:nth-child(3) { background: #28c840; }
.term-bar span { margin-left: 10px; font-size: 12px; color: #9aa6ad; font-family: var(--mono); }
.term-body { padding: 20px; height: 360px; overflow: hidden; font-family: var(--mono); font-size: 13px; line-height: 1.9; }
.term-line { opacity: 0; transform: translateY(6px); animation: lineIn .35s ease forwards; white-space: pre-wrap; }
@keyframes lineIn { to { opacity: 1; transform: none; } }
.t-user { color: #eaf0f2; }
.t-user::before { content: "❯ "; color: var(--brand); }
.t-step { color: #9aa6ad; }
.t-ok { color: #5fd6e3; }
.t-tool { color: #c9d4d8; }
.t-ans { color: #eaf0f2; padding: 10px 12px; margin-top: 6px; border-left: 2px solid var(--brand); background: rgba(33, 189, 207, .08); border-radius: 0 8px 8px 0; }
.cursor { display: inline-block; width: 8px; height: 15px; background: var(--brand); vertical-align: -2px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Ecosystem marquee ---------- */
.ecosystem { padding: 36px 0; border-bottom: 1px solid var(--border); background: var(--bg-alt); text-align: center; }
.ecosystem p { font-size: 13px; color: var(--muted); margin-bottom: 18px; letter-spacing: 1px; }
.marquee { overflow: hidden; padding: 4px 0; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; width: max-content; animation: marquee 40s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track .llm { flex: none; display: flex; align-items: center; gap: 10px; margin-right: 52px; white-space: nowrap; opacity: .85; transition: opacity .2s, transform .2s; }
.marquee-track .llm:hover { opacity: 1; transform: translateY(-2px); }
.marquee-track .llm img { width: 30px; height: 30px; }
.marquee-track .llm b { font-size: 19px; font-weight: 700; color: #3d474d; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-tag { color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: 3px; margin-bottom: 10px; }
.section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.section-desc { color: var(--muted); font-size: 17px; }
.section-desc.left { margin-bottom: 28px; }
.lead { font-size: 18px; color: var(--text); margin-bottom: 18px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span { padding: 4px 11px; font-size: 13px; border-radius: 8px; background: var(--bg-alt); border: 1px solid var(--border); color: var(--text); }
.check { display: grid; gap: 10px; }
.check li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.check .ic { color: var(--brand); margin-top: 3px; stroke-width: 2.6; }

/* ---------- Bento ---------- */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.bento-card { position: relative; padding: 32px; border-radius: 20px; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); overflow: hidden; transition: border-color .35s, transform .35s, box-shadow .35s; }
.bento-card:hover { border-color: rgba(33, 189, 207, .5); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.bento-card h3 { font-size: 22px; margin-bottom: 10px; }
.bento-card p { color: var(--muted); font-size: 15px; }
.b-ai { grid-column: span 6; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; background: radial-gradient(600px 300px at 90% 50%, rgba(33, 189, 207, .16), transparent 70%), var(--bg); }
.b-ai h3 { font-size: 28px; }
.b-ai .check { grid-template-columns: 1fr 1fr; margin-top: 22px; }
.b-dev, .b-research { grid-column: span 3; }
.b-small { grid-column: span 2; text-align: center; padding: 28px 24px; }
.big-num { font-size: 40px; font-weight: 800; line-height: 1.2; margin-bottom: 6px; }
.platform-icons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 22px; }
.platform-icons span { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 14px 6px; border-radius: 12px; background: var(--bg-alt); font-size: 13px; font-weight: 600; transition: background .3s, color .3s; }
.platform-icons svg { width: 26px; height: 26px; color: var(--brand-ink); }
.b-dev:hover .platform-icons span { background: rgba(33, 189, 207, .1); }
.flow { display: flex; flex-direction: column; align-items: center; }
.flow-node { display: flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 10px; border: 1px solid rgba(255,255,255,.14); background: rgba(255,255,255,.04); font-size: 14px; }
.flow-node .ic { width: 16px; height: 16px; color: var(--brand); }
.flow-node.hl { border-color: var(--brand); box-shadow: 0 0 24px -4px rgba(33, 189, 207, .7); color: #bff3f8; }
.flow-node.sm { padding: 8px 12px; font-size: 13px; color: var(--muted); }
.flow-line { width: 2px; height: 26px; background: linear-gradient(var(--brand), rgba(33,189,207,.3)); position: relative; overflow: hidden; }
.flow-line::after { content: ""; position: absolute; left: 0; top: -10px; width: 2px; height: 10px; background: #fff; animation: flowDot 1.6s linear infinite; }
@keyframes flowDot { to { top: 100%; } }
.flow-split { display: flex; gap: 10px; padding: 26px 0 0; position: relative; }
.flow-split::before { content: ""; position: absolute; top: 0; left: 50%; width: 2px; height: 26px; background: linear-gradient(rgba(33,189,207,.3), var(--brand)); }
.bars { margin-top: 22px; display: grid; gap: 12px; }
.bars div { display: grid; grid-template-columns: 72px 1fr; align-items: center; gap: 12px; font-size: 13px; color: var(--muted); }
.bars i { display: block; height: 8px; border-radius: 4px; background: var(--bg-alt); position: relative; overflow: hidden; }
.bars i::after { content: ""; position: absolute; inset: 0; width: var(--w); background: var(--grad); border-radius: 4px; transform-origin: left; transform: scaleX(0); transition: transform 1.2s ease .3s; }
.visible .bars i::after { transform: scaleX(1); }

/* ---------- 程序开发 ---------- */
.dev-tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.dev-tabs button { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 14px; align-items: center; text-align: left; padding: 18px 20px; border-radius: 16px; border: 1px solid var(--border); background: var(--card); cursor: pointer; transition: all .25s; box-shadow: var(--shadow); }
.dev-tabs svg { grid-row: span 2; width: 40px; height: 40px; padding: 9px; border-radius: 12px; background: var(--bg-alt); color: var(--brand-ink); transition: all .25s; }
.dev-tabs b { font-size: 16px; }
.dev-tabs span { font-size: 13px; color: var(--muted); }
.dev-tabs button:hover { border-color: rgba(33, 189, 207, .5); }
.dev-tabs button[aria-selected="true"] { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(33, 189, 207, .15), var(--shadow-lg); }
.dev-tabs button[aria-selected="true"] svg { background: var(--brand); color: #fff; }
.dev-panels { border-radius: 24px; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); overflow: hidden; }
.dev-panel { display: none; grid-template-columns: 1fr 1.1fr; min-height: 520px; }
.dev-panel.active { display: grid; }
.dev-panel.active .dev-info { animation: fadeUp .5s ease; }
.dev-panel.active .dev-stage > * { animation: fadeUp .6s ease both; }
.dev-info { padding: 48px; display: flex; flex-direction: column; justify-content: center; gap: 20px; }
.dev-info h3 { font-size: 28px; }
.dev-info > p { color: var(--muted); }
.dev-stage {
  position: relative; display: flex; align-items: center; justify-content: center; padding: 40px; overflow: hidden;
  background: radial-gradient(circle at 50% 55%, rgba(33, 189, 207, .22), transparent 60%), linear-gradient(160deg, #eaf7f9, #d6eef2);
}
.dev-stage::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(10, 127, 144, .16) 1px, transparent 1px); background-size: 18px 18px; }
.dev-stage > * { position: relative; }
.dev-stage.col { flex-direction: column; }

/* 手机外框 */
.phone { width: 236px; height: 470px; padding: 9px; border-radius: 40px; background: #1a1d20; box-shadow: 0 40px 80px -30px rgba(10, 60, 70, .55), inset 0 0 0 2px #3a3f44; flex: none; }
.screen { width: 100%; height: 100%; border-radius: 32px; overflow: hidden; background: #f6f9fa; position: relative; display: flex; flex-direction: column; color: #1c1f22; }
.sb { display: flex; justify-content: space-between; align-items: center; padding: 10px 20px 4px; font-size: 11px; }
.sb span { width: 60px; height: 18px; border-radius: 10px; background: #1a1d20; position: absolute; left: 50%; top: 8px; transform: translateX(-50%); }
.tabbar { margin-top: auto; display: flex; justify-content: space-around; padding: 10px 6px 16px; background: #fff; border-top: 1px solid #e8eef0; }
.tabbar svg { width: 20px; height: 20px; color: #a3afb5; }
.tabbar svg.on { color: var(--brand); }
/* APP 屏幕 */
.app-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 16px; }
.app-head small { display: block; font-size: 10px; color: #7b878e; }
.app-head b { font-size: 15px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: linear-gradient(135deg, #5fd6e3, #0a7f90); }
.app-card { margin: 6px 14px; padding: 12px 14px 0; border-radius: 16px; background: linear-gradient(135deg, #2fc8d9, #0b8fa1); color: #fff; overflow: hidden; }
.app-card small { font-size: 10px; opacity: .85; display: block; }
.app-card b { font-size: 20px; }
.app-card em { font-style: normal; font-size: 10px; margin-left: 6px; padding: 1px 6px; border-radius: 6px; background: rgba(255,255,255,.22); }
.app-card svg { width: calc(100% + 28px); height: 36px; margin: 4px -14px 0; }
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; padding: 10px 14px; }
.app-grid span { display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 9.5px; color: #4d585e; }
.app-grid svg { width: 36px; height: 36px; padding: 8px; border-radius: 12px; background: #fff; color: var(--brand-ink); box-shadow: 0 2px 6px rgba(0,0,0,.05); }
.app-list { padding: 2px 14px; display: grid; gap: 7px; }
.app-list div { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 12px; background: #fff; }
.app-list i { width: 24px; height: 24px; border-radius: 8px; background: #dff4f7; flex: none; }
.app-list p { flex: 1; display: grid; gap: 4px; }
.app-list b, .app-list s { display: block; height: 5px; border-radius: 3px; background: #c8d3d8; }
.app-list b { width: 70%; }
.app-list s { width: 45%; background: #e2e9ec; }
.app-list em { font-style: normal; font-size: 10px; font-weight: 700; color: var(--brand-ink); }
/* 悬浮卡片 */
.float-card { position: absolute !important; display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 14px; background: #fff; box-shadow: 0 16px 40px -14px rgba(10, 60, 70, .35); font-size: 13px; color: #1c1f22; animation: floaty 5s ease-in-out infinite !important; }
.float-card svg { width: 32px; height: 32px; padding: 7px; border-radius: 10px; background: rgba(33, 189, 207, .14); color: var(--brand-ink); }
.float-card b { display: block; font-size: 13px; }
.float-card small { color: #7b878e; font-size: 11px; }
.fc-1 { left: 7%; top: 22%; }
.fc-2 { right: 6%; bottom: 20%; animation-delay: -2.5s !important; }
@keyframes floaty { 50% { transform: translateY(-10px); } }
/* 浏览器 */
.browser { width: 100%; max-width: 520px; border-radius: 14px; overflow: hidden; background: #fff; box-shadow: 0 40px 80px -30px rgba(10, 60, 70, .5); border: 1px solid #dbe5e8; }
.browser-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; background: #f1f5f6; border-bottom: 1px solid #e2e9ec; }
.browser-bar i { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.browser-bar i:nth-child(2) { background: #febc2e; }
.browser-bar i:nth-child(3) { background: #28c840; }
.browser-bar span { flex: 1; margin-left: 10px; padding: 3px 12px; border-radius: 6px; background: #fff; font-size: 11px; color: #7b878e; font-family: var(--mono); }
.web-body { display: grid; grid-template-columns: 70px 1fr; height: 300px; }
.web-side { background: #1c1f22; padding: 14px 12px; display: grid; align-content: start; gap: 12px; }
.web-logo { width: 34px; height: 30px; color: var(--brand); margin-bottom: 8px; }
.web-side s { display: block; height: 6px; border-radius: 3px; background: rgba(255,255,255,.18); }
.web-side s.on { background: var(--brand); }
.web-main { padding: 14px; display: grid; grid-template-rows: auto 1fr auto; gap: 12px; background: #f6f9fa; }
.web-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.web-kpis div { padding: 10px; border-radius: 10px; background: #fff; border: 1px solid #e8eef0; }
.web-kpis small { display: block; font-size: 10px; color: #7b878e; }
.web-kpis b { font-size: 16px; color: #1c1f22; }
.web-kpis em { font-style: normal; font-size: 10px; color: var(--brand-ink); margin-left: 4px; }
.web-chart { border-radius: 10px; background: #fff; border: 1px solid #e8eef0; padding: 10px; }
.web-chart svg { width: 100%; height: 100%; }
.web-table { display: grid; gap: 6px; }
.web-table s { display: block; height: 8px; border-radius: 4px; background: #e2e9ec; }
.web-table s:nth-child(2) { width: 85%; }
.web-table s:nth-child(3) { width: 65%; }
.mini-phone { position: absolute !important; right: 5%; bottom: 8%; width: 110px; height: 210px; padding: 5px; border-radius: 22px; background: #1a1d20; box-shadow: 0 24px 50px -20px rgba(10, 60, 70, .6); }
.mini-phone .screen { border-radius: 18px; padding: 16px 8px 8px; gap: 6px; }
.mp-hero { height: 60px; border-radius: 10px; background: linear-gradient(135deg, #2fc8d9, #0b8fa1); }
.mini-phone s { display: block; height: 6px; border-radius: 3px; background: #c8d3d8; }
.mini-phone s.short { width: 60%; }
.mp-btn { margin-top: auto; height: 20px; border-radius: 10px; background: var(--brand); }
/* 小程序屏幕 */
.mini-head { display: flex; justify-content: center; align-items: center; position: relative; padding: 6px 12px 8px; }
.mini-head b { font-size: 14px; }
.capsule { position: absolute; right: 10px; display: flex; border: 1px solid #dfe6e9; border-radius: 12px; background: #fff; font-size: 9px; }
.capsule i { font-style: normal; padding: 2px 8px; }
.capsule i + i { border-left: 1px solid #dfe6e9; }
.mini-search { display: flex; align-items: center; gap: 6px; margin: 0 14px; padding: 6px 12px; border-radius: 16px; background: #fff; font-size: 10px; color: #9aa6ad; }
.mini-search svg { width: 12px; height: 12px; }
.mini-banner { margin: 10px 14px; padding: 16px 14px; border-radius: 14px; background: linear-gradient(120deg, #222 30%, #0b8fa1); color: #fff; }
.mini-banner b { display: block; font-size: 15px; }
.mini-banner small { font-size: 10px; color: #8fe7f0; }
.mini-goods { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 0 14px; }
.mini-goods div { background: #fff; border-radius: 12px; padding: 6px; display: grid; gap: 5px; }
.mini-goods i { height: 48px; border-radius: 8px; }
.g1 { background: linear-gradient(135deg, #d4f2f6, #8fdde7); }
.g2 { background: linear-gradient(135deg, #e6eaec, #c3ccd1); }
.g3 { background: linear-gradient(135deg, #c9eef3, #4cc9d8); }
.g4 { background: linear-gradient(135deg, #2c3136, #5a646b); }
.mini-goods s { display: block; height: 5px; width: 80%; border-radius: 3px; background: #dbe3e6; }
.mini-goods em { font-style: normal; font-size: 11px; font-weight: 700; color: #e4572e; }
/* 桌面端 */
.monitor { width: 100%; max-width: 500px; padding: 10px; border-radius: 16px; background: #1a1d20; box-shadow: 0 40px 80px -30px rgba(10, 60, 70, .55); }
.stand { width: 120px; height: 46px; margin-top: -2px; background: linear-gradient(#2a2f34, #1a1d20); clip-path: polygon(30% 0, 70% 0, 82% 85%, 100% 100%, 0 100%, 18% 85%); }
.win { border-radius: 8px; overflow: hidden; background: #fff; }
.win-bar { display: flex; align-items: center; gap: 6px; padding: 8px 12px; background: #eef3f4; font-size: 11px; color: #5d6870; }
.win-bar i { width: 9px; height: 9px; border-radius: 50%; background: #ff5f57; }
.win-bar i:nth-child(2) { background: #febc2e; }
.win-bar i:nth-child(3) { background: #28c840; }
.win-bar span { margin-left: 8px; font-weight: 600; }
.win-body { display: grid; grid-template-columns: 110px 1fr; height: 250px; }
.win-side { background: #f4f7f8; border-right: 1px solid #e2e9ec; padding: 12px 10px; display: grid; align-content: start; gap: 9px; }
.win-side b { font-size: 11px; color: #5d6870; }
.win-side s { display: block; height: 22px; border-radius: 6px; background: #e3eaec; }
.win-side s.on { background: rgba(33, 189, 207, .25); box-shadow: inset 3px 0 0 var(--brand); }
.win-chat { padding: 14px; display: flex; flex-direction: column; gap: 10px; font-size: 11px; color: #1c1f22; }
.wb { padding: 8px 12px; border-radius: 10px; max-width: 85%; }
.wb.user { align-self: flex-end; background: var(--brand); color: #08262b; font-weight: 600; }
.wb.ai { background: #f1f5f6; display: grid; gap: 6px; width: 85%; }
.wb.ai s { display: block; height: 5px; border-radius: 3px; background: #c8d3d8; }
.wb.ai s.short { width: 55%; }
.win-input { margin-top: auto; display: flex; justify-content: space-between; align-items: center; padding: 8px 10px; border: 1px solid #e2e9ec; border-radius: 8px; color: #9aa6ad; }
.win-input i { font-style: normal; font-size: 10px; color: var(--brand-ink); background: rgba(33,189,207,.12); padding: 1px 8px; border-radius: 6px; }

.delivery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 24px; }
.delivery > div { display: flex; gap: 14px; align-items: flex-start; padding: 20px; border-radius: 16px; background: var(--card); border: 1px solid var(--border); box-shadow: var(--shadow); }
.delivery svg { width: 40px; height: 40px; padding: 9px; border-radius: 12px; background: rgba(33, 189, 207, .12); color: var(--brand-ink); flex: none; }
.delivery b { display: block; font-size: 15px; margin-bottom: 2px; }
.delivery span { font-size: 13px; color: var(--muted); }

/* ---------- AI 架构 ---------- */
.platform-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: center; }
.platform-points { display: grid; gap: 18px; }
.platform-points li { display: flex; gap: 14px; color: var(--muted); font-size: 15px; }
.platform-points svg { width: 40px; height: 40px; padding: 9px; border-radius: 12px; background: rgba(33, 189, 207, .12); color: var(--brand); flex: none; }
.platform-points b { display: block; color: var(--text); font-size: 16px; margin-bottom: 2px; }
.stack { display: grid; gap: 12px; }
.layer { padding: 18px 20px; border-radius: 14px; border: 1px solid var(--border); background: var(--card); transition: transform .3s, border-color .3s, background .3s; }
.layer:hover { transform: translateX(-6px); background: var(--card-hover); }
.layer h4 { font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.layer h4::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: currentColor; }
.layer > div { display: flex; flex-wrap: wrap; gap: 8px; }
.layer span { font-size: 13px; padding: 4px 12px; border-radius: 8px; background: rgba(255,255,255,.05); border: 1px solid var(--border); }
.l4 { border-color: rgba(33, 189, 207, .6); background: rgba(33, 189, 207, .1); } .l4 h4 { color: #8fe7f0; }
.l3 { border-color: rgba(33, 189, 207, .4); } .l3 h4 { color: #5fd6e3; }
.l2 { border-color: rgba(33, 189, 207, .25); } .l2 h4 { color: #34b9c9; }
.l1 h4 { color: #9aa6ad; }

/* ---------- Tabs（行业） ---------- */
.tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.tabs button { padding: 9px 22px; border-radius: 999px; border: 1px solid var(--border); background: var(--card); color: var(--muted); cursor: pointer; font-size: 15px; transition: all .25s; }
.tabs button:hover { color: var(--text); border-color: var(--brand); }
.tabs button[aria-selected="true"] { background: var(--charcoal); color: #fff; border-color: transparent; }
.tab-panels { border-radius: 20px; border: 1px solid var(--border); background: linear-gradient(160deg, #f3fbfc, #fff); box-shadow: var(--shadow); padding: 40px; }
.tab-panel { display: none; grid-template-columns: 1fr 1.6fr; gap: 40px; align-items: center; }
.tab-panel.active { display: grid; animation: fadeUp .5s ease; }
.tab-panel h3 { font-size: 24px; margin-bottom: 10px; text-wrap: balance; }
.tab-panel > div p { color: var(--muted); }
.panel-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; }
.panel-tags span { width: 100%; font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: 1px; }
.panel-tags b { font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 999px; background: #fff; border: 1px solid rgba(33, 189, 207, .35); color: var(--brand-ink); }
.scenes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.scenes li { padding: 18px; border-radius: 14px; background: #fff; border: 1px solid var(--border); color: var(--muted); font-size: 14px; transition: border-color .3s; }
.scenes li:hover { border-color: rgba(33, 189, 207, .5); }
.scenes svg { width: 36px; height: 36px; padding: 8px; border-radius: 10px; background: rgba(33, 189, 207, .12); color: var(--brand-ink); margin-bottom: 10px; }
.scenes b { display: block; color: var(--text); font-size: 16px; margin-bottom: 4px; }

/* ---------- Demo ---------- */
.demo { display: grid; gap: 24px; }
.demo-menu { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.demo-group { display: grid; gap: 8px; align-content: start; }
.demo-group h4 { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: 1px; padding-left: 4px; margin-bottom: 2px; }
.demo-menu button { display: flex; gap: 12px; align-items: center; text-align: left; padding: 12px 14px; border-radius: 14px; border: 1px solid var(--border); background: var(--card); cursor: pointer; transition: all .25s; box-shadow: var(--shadow); }
.demo-menu svg { width: 36px; height: 36px; padding: 8px; border-radius: 10px; background: var(--bg-alt); color: var(--brand-ink); flex: none; transition: all .25s; }
.demo-menu b { display: block; font-size: 15px; }
.demo-menu span { display: block; font-size: 12px; color: var(--muted); }
.demo-menu button:hover { border-color: rgba(33, 189, 207, .5); transform: translateY(-2px); }
.demo-menu button.active { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(33, 189, 207, .15); }
.demo-menu button.active svg { background: var(--brand); color: #fff; }
.demo-window { display: flex; flex-direction: column; background: #16191c; }
.demo-progress { margin-left: auto; font-style: normal; font-size: 12px; color: #5fd6e3; font-family: var(--mono); }
.demo-chat { height: 470px; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 16px; font-size: 15px; scroll-behavior: smooth; }
.demo-chat::-webkit-scrollbar { width: 6px; }
.demo-chat::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 3px; }
.msg { max-width: 88%; padding: 12px 16px; border-radius: 14px; animation: lineIn .35s ease forwards; opacity: 0; white-space: pre-wrap; flex: none; }
.msg.user { align-self: flex-end; background: var(--grad); color: #08262b; font-weight: 600; border-bottom-right-radius: 4px; }
.msg.ai { align-self: flex-start; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-bottom-left-radius: 4px; width: min(100%, 680px); }
.msg.ai pre { font-family: var(--mono); font-size: 13px; background: rgba(0,0,0,.35); padding: 12px; border-radius: 8px; margin-top: 10px; overflow-x: auto; white-space: pre; color: #bff3f8; }
.msg .src { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; white-space: normal; }
.msg .src span { font-size: 12px; padding: 2px 8px; border-radius: 6px; background: rgba(33, 189, 207, .14); color: #8fe7f0; }
.msg .src span.neg { background: rgba(248, 113, 113, .14); color: #fca5a5; }
.msg.steps { align-self: flex-start; font-family: var(--mono); font-size: 13px; color: #9aa6ad; background: none; padding: 0 4px; }
.mini-chart { display: flex; align-items: flex-end; gap: 10px; height: 110px; margin-top: 12px; padding: 10px 4px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.mini-chart div { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; font-size: 11px; color: #9aa6ad; gap: 4px; }
.mini-chart i { display: block; width: 100%; max-width: 34px; border-radius: 4px 4px 0 0; background: var(--grad); animation: grow .8s ease both; transform-origin: bottom; }
.mini-chart div.down i { background: linear-gradient(#f87171, #fb923c); }
@keyframes grow { from { transform: scaleY(0); } }
@keyframes barIn { from { transform: scaleX(0); } }
/* 结果组件：表格 */
.x-table { margin-top: 12px; border-radius: 10px; overflow: hidden; border: 1px solid rgba(255,255,255,.1); white-space: normal; font-size: 13px; }
.x-table > div { display: grid; grid-template-columns: 1fr 90px 64px; gap: 10px; padding: 9px 12px; border-top: 1px solid rgba(255,255,255,.06); }
.x-table > .x-head { border-top: 0; background: rgba(255,255,255,.05); color: #9aa6ad; font-size: 12px; }
.x-table span:last-child { color: #5fd6e3; font-family: var(--mono); }
/* 风险清单 */
.x-risk { margin-top: 12px; display: grid; gap: 8px; white-space: normal; }
.x-risk li { display: flex; gap: 12px; align-items: flex-start; padding: 10px 12px; border-radius: 10px; background: rgba(0,0,0,.25); font-size: 13px; color: #b4bfc4; }
.x-risk b { display: block; color: #eaf0f2; font-size: 14px; margin-bottom: 2px; }
.lv { flex: none; font-style: normal; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 6px; margin-top: 2px; }
.lv.high { background: rgba(248, 113, 113, .16); color: #fca5a5; }
.lv.mid { background: rgba(251, 191, 36, .16); color: #fcd34d; }
.lv.low { background: rgba(33, 189, 207, .16); color: #8fe7f0; }
/* 情感分布 */
.x-senti { margin-top: 12px; display: grid; gap: 8px; white-space: normal; }
.x-senti div { display: grid; grid-template-columns: 40px 1fr 44px; gap: 10px; align-items: center; font-size: 13px; color: #9aa6ad; }
.x-senti i, .x-rank i { display: block; height: 8px; border-radius: 4px; background: rgba(255,255,255,.06); position: relative; overflow: hidden; }
.x-senti i::after, .x-rank i::after { content: ""; position: absolute; inset: 0; width: var(--w); border-radius: 4px; background: var(--grad); transform-origin: left; animation: barIn 1s ease both; }
.x-senti i.n::after { background: #7a8890; }
.x-senti i.bad::after { background: linear-gradient(90deg, #f87171, #fb923c); }
.x-senti b { color: #eaf0f2; font-family: var(--mono); font-weight: 600; }
/* 候选人排名 */
.x-rank { margin-top: 12px; display: grid; gap: 10px; white-space: normal; }
.x-rank div { display: grid; grid-template-columns: 76px 1fr 30px; gap: 4px 12px; align-items: center; padding: 10px 12px; border-radius: 10px; background: rgba(0,0,0,.25); }
.x-rank b { font-size: 14px; }
.x-rank em { font-style: normal; font-weight: 800; color: #5fd6e3; font-family: var(--mono); }
.x-rank small { grid-column: 1 / -1; font-size: 12px; color: #9aa6ad; }
/* 物流进度 */
.x-track { margin-top: 14px; display: grid; grid-template-columns: repeat(4, 1fr); white-space: normal; }
.x-track div { position: relative; text-align: center; font-size: 13px; color: #7a8890; padding-top: 22px; }
.x-track div::before { content: ""; position: absolute; top: 6px; left: -50%; width: 100%; height: 2px; background: rgba(255,255,255,.1); }
.x-track div:first-child::before { display: none; }
.x-track div.done::before, .x-track div.now::before { background: var(--brand); }
.x-track i { position: absolute; top: 0; left: 50%; width: 14px; height: 14px; margin-left: -7px; border-radius: 50%; background: #2a2f34; border: 2px solid rgba(255,255,255,.15); z-index: 1; }
.x-track .done i { background: var(--brand); border-color: var(--brand); }
.x-track .now i { background: #16191c; border-color: var(--brand); box-shadow: 0 0 0 4px rgba(33, 189, 207, .25); animation: pulse 2s infinite; }
.x-track .done, .x-track .now { color: #eaf0f2; }
.x-track b { display: block; font-weight: 600; }
.x-track small { font-size: 11px; color: #9aa6ad; }
/* 键值字段 */
.x-kv { margin-top: 12px; display: grid; grid-template-columns: auto 1fr auto 1fr; gap: 8px 14px; padding: 12px 14px; border-radius: 10px; background: rgba(0,0,0,.25); font-size: 13px; white-space: normal; }
.x-kv span { color: #9aa6ad; }
.x-kv b { font-weight: 600; }
.x-kv b.hl { color: #5fd6e3; }
/* 多平台文案 */
.x-copy { margin-top: 12px; display: grid; gap: 8px; white-space: normal; font-size: 14px; }
.x-copy div { padding: 10px 12px; border-radius: 10px; background: rgba(0,0,0,.25); border-left: 2px solid var(--brand); }
.x-copy em { font-style: normal; display: inline-block; font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 6px; background: rgba(33, 189, 207, .16); color: #8fe7f0; margin-right: 8px; }
/* 海报 */
.x-posters { margin-top: 12px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; max-width: 420px; white-space: normal; }
.x-posters div { aspect-ratio: 3 / 4; border-radius: 10px; padding: 14px; display: flex; flex-direction: column; justify-content: flex-end; position: relative; overflow: hidden; color: #fff; animation: lineIn .5s ease both; }
.x-posters div:nth-child(2) { animation-delay: .15s; }
.x-posters div:nth-child(3) { animation-delay: .3s; }
.x-posters div::before { content: ""; position: absolute; border-radius: 50%; }
.x-posters small { font-size: 9px; letter-spacing: 2px; opacity: .8; position: relative; }
.x-posters b { font-size: 20px; line-height: 1.2; position: relative; }
.x-posters span { font-size: 11px; position: relative; opacity: .9; }
.x-posters .p1 { background: linear-gradient(160deg, #21bdcf, #0b5f6c); }
.x-posters .p1::before { width: 120%; height: 70%; top: -20%; right: -40%; background: rgba(255,255,255,.18); }
.x-posters .p2 { background: linear-gradient(160deg, #222, #0e7c8c); }
.x-posters .p2::before { width: 70%; aspect-ratio: 1; top: 12%; left: 15%; border: 10px solid rgba(33, 189, 207, .7); }
.x-posters .p3 { background: linear-gradient(200deg, #7ae4ef, #21bdcf 50%, #222); }
.x-posters .p3::before { width: 40%; aspect-ratio: 1; top: 14%; right: 12%; background: #fff; opacity: .85; }
.demo-input { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 20px; border-top: 1px solid rgba(255,255,255,.08); font-size: 14px; color: #9aa6ad; }
.demo-input span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.demo-actions { display: flex; gap: 8px; flex: none; }
.demo-input button { flex: none; background: none; border: 1px solid rgba(255,255,255,.12); border-radius: 8px; padding: 6px 12px; cursor: pointer; color: #9aa6ad; font-size: 13px; }
.demo-input button:hover { color: #fff; border-color: var(--brand); }
#demoNext { color: #08262b; background: var(--brand); border-color: var(--brand); font-weight: 600; }

/* ---------- 合作模式 ---------- */
.models { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 72px; }
.model { padding: 32px; border-radius: 20px; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); position: relative; transition: transform .3s, border-color .3s; }
.model:hover { transform: translateY(-6px); border-color: rgba(33, 189, 207, .5); }
.model.featured { background: var(--charcoal); color: #eaf0f2; border-color: var(--charcoal); box-shadow: 0 24px 60px -24px rgba(0, 0, 0, .45); }
.model.featured p:last-child { color: #b4bfc4; }
.model-tag { font-size: 12px; color: var(--muted); border: 1px solid var(--border); padding: 2px 10px; border-radius: 999px; }
.featured .model-tag { background: var(--brand); color: #08262b; border-color: transparent; font-weight: 700; }
.model h3 { font-size: 21px; margin: 16px 0 4px; }
.model-time { font-size: 28px; font-weight: 800; margin-bottom: 12px; color: var(--brand-ink); }
.featured .model-time { color: var(--brand); }
.model p:last-child { color: var(--muted); font-size: 15px; }
.process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; position: relative; }
.process::before { content: ""; position: absolute; top: 28px; left: 10%; right: 10%; height: 2px; background: linear-gradient(90deg, transparent, var(--brand), transparent); opacity: .6; }
.process li { text-align: center; position: relative; }
.process li > span { width: 56px; height: 56px; margin: 0 auto 18px; display: grid; place-items: center; border-radius: 50%; font-weight: 800; font-size: 20px; background: #fff; border: 2px solid var(--brand); color: var(--brand-ink); position: relative; box-shadow: 0 0 0 6px rgba(33, 189, 207, .1); }
.process h3 { font-size: 17px; margin-bottom: 4px; }
.process p { color: var(--muted); font-size: 14px; }

/* ---------- 安全可信 ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.trust { padding: 28px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); transition: border-color .3s, transform .3s; }
.trust:hover { border-color: rgba(33, 189, 207, .5); transform: translateY(-4px); }
.trust > svg { width: 46px; height: 46px; padding: 11px; border-radius: 14px; background: rgba(33, 189, 207, .12); color: var(--brand-ink); margin-bottom: 16px; }
.trust h3 { font-size: 18px; margin-bottom: 6px; }
.trust p { color: var(--muted); font-size: 15px; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case { border-radius: 20px; overflow: hidden; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); transition: transform .35s, box-shadow .35s; }
.case:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-cover { height: 200px; position: relative; display: flex; flex-direction: column; justify-content: flex-end; padding: 22px; color: #fff; overflow: hidden; }
.case-cover::after { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.12) 1px, transparent 1px); background-size: 16px 16px; }
.cover-art { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; transition: transform .6s; }
.case:hover .cover-art { transform: scale(1.05); }
.case-cover span, .case-cover strong, .case-cover em { position: relative; z-index: 2; }
.case-cover span { position: absolute; top: 16px; left: 16px; padding: 4px 12px; border-radius: 999px; background: rgba(0,0,0,.25); font-size: 13px; }
.case-cover strong { font-size: 40px; font-weight: 800; line-height: 1.1; }
.case-cover em { font-style: normal; font-size: 14px; opacity: .85; }
.c1 { background: linear-gradient(135deg, #0e7c8c, #1d2a30); }
.c2 { background: linear-gradient(135deg, #21bdcf, #0b6f7e); }
.c3 { background: linear-gradient(135deg, #222, #0e7c8c); }
.c4 { background: linear-gradient(135deg, #1d2a30, #21bdcf); }
.case-filter { margin-bottom: 36px; }
.case.is-hidden { display: none; }
.case.is-shown { animation: fadeUp .5s ease both; }
.case-body h3 { min-height: 2.9em; }
.case-body { padding: 26px; }
.case-body h3 { font-size: 18px; margin-bottom: 10px; }
.case-body p { color: var(--muted); font-size: 15px; margin-bottom: 16px; }
.case-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.case-tags span { font-size: 12px; padding: 3px 10px; border-radius: 6px; color: var(--brand-ink); background: rgba(33, 189, 207, .1); }

/* ---------- 研究 ---------- */
.radar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 48px; }
.ring { padding: 24px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); border-top: 4px solid; }
.ring h4 { font-size: 20px; margin-bottom: 2px; }
.ring h4 small { font-size: 13px; color: var(--muted); font-weight: 400; margin-left: 4px; }
.ring > p { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.ring > div { display: flex; flex-wrap: wrap; gap: 8px; }
.ring span { font-size: 13px; padding: 4px 10px; border-radius: 8px; background: var(--bg-alt); }
.adopt { border-top-color: #0a7f90; } .adopt h4 { color: #0a7f90; }
.trial { border-top-color: var(--brand); } .trial h4 { color: #109fb1; }
.assess { border-top-color: #7a8890; } .assess h4 { color: #5d6870; }
.hold { border-top-color: var(--charcoal); } .hold h4 { color: var(--charcoal); }
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.insight { display: flex; flex-direction: column; padding: 0 0 26px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); overflow: hidden; transition: border-color .3s, transform .3s; }
.insight > :not(.insight-art) { margin-left: 26px; margin-right: 26px; }
.insight:hover { border-color: rgba(33, 189, 207, .5); transform: translateY(-4px); }
.insight:hover .more { color: var(--brand-ink); }
.insight-art { width: 100%; height: 140px; background: linear-gradient(160deg, #eef8fa, #dcf1f4); margin-bottom: 20px; }
.insight-cat { align-self: flex-start; font-size: 12px; padding: 3px 10px; border-radius: 6px; background: var(--charcoal); color: #fff; margin-bottom: 12px; }
.insight h3 { font-size: 18px; line-height: 1.45; margin-bottom: 10px; }
.insight p { color: var(--muted); font-size: 15px; flex: 1; margin-bottom: 16px; }
.more { font-size: 14px; font-weight: 600; color: var(--muted); transition: color .2s; }

/* ---------- 智拓共创计划 ---------- */
.venture { position: relative; overflow: hidden; }
.venture > .container { position: relative; z-index: 1; }
.venture-bg { position: absolute; inset: 0; background: radial-gradient(700px 400px at 15% 10%, rgba(33, 189, 207, .16), transparent 70%), radial-gradient(600px 400px at 90% 90%, rgba(33, 189, 207, .1), transparent 70%); }
.venture-bg::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px); background-size: 56px 56px; mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 70%); }
.v-who { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 10px; margin: -20px 0 56px; }
.v-who span { color: var(--muted); font-size: 14px; margin-right: 4px; }
.v-who b { font-weight: 600; font-size: 14px; padding: 6px 14px; border-radius: 999px; border: 1px solid rgba(33, 189, 207, .35); background: rgba(33, 189, 207, .08); color: #bff3f8; }
.v-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; margin-bottom: 64px; position: relative; }
.v-steps::before { content: ""; position: absolute; top: 47px; left: 8%; right: 8%; height: 2px; background: linear-gradient(90deg, transparent, var(--brand), transparent); opacity: .5; }
.v-steps li { position: relative; padding: 24px 20px; border-radius: 16px; border: 1px solid var(--border); background: rgba(22, 25, 28, .75); backdrop-filter: blur(6px); transition: border-color .3s, transform .3s; }
.v-steps li:hover { border-color: rgba(33, 189, 207, .55); transform: translateY(-6px); }
.v-num { position: absolute; top: 16px; right: 18px; font-family: var(--mono); font-size: 13px; color: rgba(255,255,255,.25); }
.v-steps svg { width: 46px; height: 46px; padding: 11px; border-radius: 14px; background: var(--brand); color: #08262b; margin-bottom: 16px; box-shadow: 0 0 0 6px rgba(33, 189, 207, .15), 0 8px 24px -6px rgba(33, 189, 207, .6); position: relative; }
.v-steps h3 { font-size: 17px; margin-bottom: 6px; }
.v-steps p { font-size: 13px; color: var(--muted); }
.v-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.v-sub { font-size: 18px; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.v-sub::before { content: ""; width: 4px; height: 18px; border-radius: 2px; background: var(--brand); }
.v-sub:not(:first-child) { margin-top: 32px; }
.v-offer { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.v-offer div { padding: 16px; border-radius: 14px; border: 1px solid var(--border); background: var(--card); }
.v-offer svg { width: 22px; height: 22px; color: var(--brand); margin-bottom: 8px; }
.v-offer b { display: block; font-size: 15px; }
.v-offer span { font-size: 13px; color: var(--muted); }
.v-criteria { display: grid; gap: 10px; }
.v-criteria li { display: flex; gap: 10px; font-size: 14px; color: var(--muted); }
.v-criteria .ic { color: var(--brand); margin-top: 3px; stroke-width: 2.6; }
.v-criteria b { color: var(--text); margin-right: 8px; }
.v-modes { display: flex; flex-wrap: wrap; gap: 10px; }
.v-modes span { padding: 8px 18px; border-radius: 10px; background: rgba(255,255,255,.06); border: 1px solid var(--border); font-weight: 600; font-size: 14px; }
.v-note { margin-top: 14px; font-size: 13px; color: var(--muted); }
.v-form { background: rgba(255,255,255,.04); border-color: rgba(33, 189, 207, .3); box-shadow: 0 30px 80px -30px rgba(0,0,0,.6), 0 0 60px -30px rgba(33, 189, 207, .5); }
.v-form-head { display: flex; align-items: center; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.v-form-head svg { width: 44px; height: 40px; color: var(--brand); }
.v-form-head b { display: block; font-size: 20px; }
.v-form-head span { font-size: 13px; color: var(--brand); }
.contact-form.v-form input, .contact-form.v-form select, .contact-form.v-form textarea { background: rgba(0,0,0,.3); color: var(--text); }
.contact-form.v-form input:focus, .contact-form.v-form select:focus, .contact-form.v-form textarea:focus { background: rgba(0,0,0,.45); color: #fff; }
.contact-form.v-form ::placeholder { color: #6f7b83; }
/* 浏览器自动填充时保持深色背景、浅色文字 */
.contact-form.v-form input:-webkit-autofill, .contact-form.v-form input:-webkit-autofill:focus { -webkit-text-fill-color: #eaf0f2; box-shadow: 0 0 0 1000px #23282c inset; caret-color: #fff; }
.v-form select option { background: #1c2024; color: #eaf0f2; }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
#about p:not(.section-tag):not(.lead) { color: var(--muted); margin-bottom: 14px; }
#about strong { color: var(--text); }
.values { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.values div { padding: 18px; border-radius: 14px; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); }
.values svg { width: 22px; height: 22px; color: var(--brand-ink); margin-bottom: 8px; }
.values b { display: block; margin-bottom: 2px; }
.values span { font-size: 13px; color: var(--muted); }
.about-visual { position: relative; aspect-ratio: 1; max-width: 500px; width: 100%; margin: 0 auto; border-radius: 50%; background: radial-gradient(circle, rgba(33, 189, 207, .16), transparent 65%); }
.orbit { position: absolute; border-radius: 50%; border: 1px dashed rgba(10, 127, 144, .3); inset: 0; }
.o1 { inset: 30%; border-style: solid; border-color: rgba(33, 189, 207, .3); }
.o2 { inset: 15%; animation: spin 40s linear infinite; }
.o3 { inset: 0; animation: spin 60s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.about-logo { position: absolute; left: 50%; top: 50%; width: 34%; height: 31%; transform: translate(-50%, -50%); color: var(--brand); filter: drop-shadow(0 16px 30px rgba(33, 189, 207, .35)); }
.planet { position: absolute; display: flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--border); box-shadow: 0 10px 24px -10px rgba(10, 60, 70, .3); font-size: 13px; font-weight: 600; white-space: nowrap; animation: floaty 6s ease-in-out infinite; }
.planet svg { width: 16px; height: 16px; color: var(--brand-ink); }
.p1 { left: 8%; top: 14%; }
.p2 { right: 4%; top: 22%; animation-delay: -1s; }
.p3 { right: -2%; top: 58%; animation-delay: -2s; background: var(--charcoal); color: #fff; border-color: var(--charcoal); }
.p3 svg { color: var(--brand); }
.p4 { left: 26%; bottom: 2%; animation-delay: -3s; }
.p5 { left: -4%; top: 52%; animation-delay: -4s; }
.p6 { right: 18%; bottom: 10%; animation-delay: -5s; }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 860px; }
.faq { display: grid; gap: 12px; }
.faq details { border-radius: 14px; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow); transition: border-color .3s; }
.faq details[open] { border-color: rgba(33, 189, 207, .5); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 24px; font-size: 17px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--brand-ink); transition: transform .3s; flex: none; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 24px 20px; color: var(--muted); }

/* ---------- CTA ---------- */
.cta-band { padding: 80px 0; background: var(--grad); position: relative; overflow: hidden; color: #08262b; }
.cta-mark { position: absolute; right: 4%; top: 50%; width: 340px; height: 305px; transform: translateY(-50%); color: rgba(255, 255, 255, .22); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; position: relative; z-index: 1; }
.cta-band h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 800; }
.cta-band p { opacity: .8; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; }
.contact-list { margin-top: 32px; display: grid; gap: 20px; }
.contact-list li { display: flex; gap: 16px; align-items: center; }
.contact-list li > span { width: 48px; height: 48px; flex: none; display: grid; place-items: center; border-radius: 14px; background: rgba(33, 189, 207, .12); color: var(--brand-ink); }
.contact-list li > span svg { width: 22px; height: 22px; }
.contact-list small { display: block; color: var(--muted); font-size: 13px; }
.contact-list a { font-weight: 600; }
.contact-list a:hover { color: var(--brand-ink); }
.contact-form { padding: 36px; border-radius: 20px; border: 1px solid var(--border); background: var(--card); box-shadow: var(--shadow-lg); display: grid; gap: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 8px; font-size: 14px; color: var(--muted); }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; padding: 12px 14px; font: inherit; font-size: 15px; color: var(--text);
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: 10px; outline: none; transition: border-color .2s, box-shadow .2s, background .2s; resize: vertical;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(33, 189, 207, .18); }
.contact-form .invalid { border-color: #e5484d; }
.contact-form input:-webkit-autofill { -webkit-text-fill-color: var(--text); box-shadow: 0 0 0 1000px #f3f7f8 inset; }
.form-status { min-height: 1.5em; font-size: 14px; text-align: center; }
.form-status.ok { color: var(--brand-ink); }
.form-status.err { color: #e5484d; }

/* 表单提交状态 */
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-note { font-size: 12px; color: var(--muted); text-align: center; margin-top: -6px; }
.form-status a { color: inherit; text-decoration: underline; font-weight: 600; }
.contact-form { position: relative; }
.contact-form .btn[disabled] { opacity: .7; cursor: wait; transform: none; }
.form-success { position: absolute; inset: 0; z-index: 2; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 32px; text-align: center; border-radius: inherit; background: var(--card); animation: fadeUp .4s ease; }
.v-form .form-success { background: #1c2024; }
.form-success svg { width: 64px; height: 64px; padding: 16px; border-radius: 50%; background: var(--brand); color: #08262b; stroke-width: 3; box-shadow: 0 0 0 10px rgba(33, 189, 207, .15); }
.form-success h3 { font-size: 22px; }
.form-success p { color: var(--muted); max-width: 320px; }
.form-success button { margin-top: 8px; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 999px; padding: 8px 20px; cursor: pointer; }
.form-success button:hover { border-color: var(--brand); }

/* ---------- Footer ---------- */
.footer { padding: 64px 0 28px; }
.footer .brand { color: var(--text); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 40px; border-bottom: 1px solid var(--border); }
.footer-desc { color: var(--muted); font-size: 14px; margin-top: 16px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.footer-col h4 { font-size: 15px; margin-bottom: 4px; }
.footer-col a { color: var(--muted); }
.footer-col a:hover { color: var(--brand); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 24px; color: var(--muted); font-size: 13px; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-content > *, .hero-visual, .aurora i, .beams, .orbit-3d i, .btn-shine::after, .hero h1 .grad, .marquee-track, .flow-line::after, .orbit, .planet, .float-card { animation: none !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .nav-links { gap: 18px; font-size: 14px; }
  .hero-grid, .platform-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { height: 560px; }
  .hero-visual .hero-terminal { left: 0; }
  .b-ai { grid-template-columns: 1fr; }
  .dev-tabs { grid-template-columns: repeat(2, 1fr); }
  .dev-panel { grid-template-columns: 1fr; }
  .dev-stage { min-height: 460px; }
  .delivery { grid-template-columns: repeat(2, 1fr); }
  .trust-grid, .case-grid, .insight-grid, .models { grid-template-columns: repeat(2, 1fr); }
  .radar { grid-template-columns: repeat(2, 1fr); }
  .tab-panel { grid-template-columns: 1fr; gap: 24px; }
  .process { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .v-steps { grid-template-columns: repeat(3, 1fr); }
  .v-steps::before { display: none; }
  .v-grid { grid-template-columns: 1fr; }
  .process::before { display: none; }
}
@media (max-width: 960px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px 16px 24px;
    background: #fff; border-bottom: 1px solid #e2e9ec; font-size: 15px;
    transform: translateY(-120%); transition: transform .35s; z-index: -1;
  }
  .nav-links.open { transform: none; }
  .nav-links a:not(.btn) { width: 100%; padding: 14px 0; border-bottom: 1px solid #e2e9ec; color: #5d6870; }
  .nav-links a.active::after { display: none; }
  .nav-links .btn { margin-top: 16px; width: 100%; }
  .nav.menu-open .nav-toggle span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .nav.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  .demo-menu { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .brand-logo { height: 34px; }
  .section { padding: 80px 0; }
  .hero-visual { height: auto; }
  #logoCanvas { position: relative; height: 340px; }
  .logo-glow, .orbit-3d { top: 170px; left: 50%; }
  .orbit-3d { transform: scale(.6); }
  .visual-hint { top: 0; right: 50%; transform: translateX(50%); }
  .hero-visual .hero-terminal { position: relative; left: 0; width: 100%; margin-top: 16px; }
  .stats { gap: 28px; }
  .stat strong { font-size: 30px; }
  .term-body { height: 320px; font-size: 12px; padding: 16px; }
  .bento-card { padding: 24px; }
  .b-dev, .b-research, .b-small { grid-column: span 6; }
  .b-ai .check, .scenes, .values { grid-template-columns: 1fr; }
  .platform-icons { grid-template-columns: repeat(2, 1fr); }
  .flow-split { flex-wrap: wrap; justify-content: center; }
  .dev-tabs { gap: 10px; }
  .dev-tabs button { padding: 14px; grid-template-columns: 1fr; text-align: center; justify-items: center; row-gap: 6px; }
  .dev-tabs svg { grid-row: auto; }
  .dev-tabs span { display: none; }
  .dev-info { padding: 28px 22px; }
  .dev-stage { padding: 30px 12px; min-height: 0; }
  .float-card { display: none; }
  .mini-phone { display: none; }
  .web-body { height: 240px; grid-template-columns: 50px 1fr; }
  .delivery, .trust-grid, .case-grid, .insight-grid, .models, .radar { grid-template-columns: 1fr; }
  .tab-panels { padding: 22px; }
  .process { grid-template-columns: 1fr 1fr; }
  .v-steps { grid-template-columns: 1fr; }
  .v-offer { grid-template-columns: 1fr; }
  .v-who { margin-top: -16px; }
  .demo-menu { gap: 12px; }
  .demo-menu button { padding: 10px; gap: 8px; }
  .demo-menu svg { width: 30px; height: 30px; padding: 6px; }
  .demo-menu span { display: none; }
  .demo-chat { padding: 16px; height: 480px; font-size: 14px; }
  .x-kv { grid-template-columns: auto 1fr; }
  .x-table > div { grid-template-columns: 1fr 64px 48px; }
  .demo-progress { display: none; }
  .msg { max-width: 100%; }
  .planet { font-size: 11px; padding: 6px 10px; }
  .field-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-mark { opacity: .5; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}

/* ==========================================================
   H5 移动端适配
   ========================================================== */
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
html, body { overflow-x: hidden; }
@supports (overflow: clip) { html, body { overflow-x: clip; } }
a, button, summary { -webkit-tap-highlight-color: transparent; }
#about { overflow-x: clip; }
.section-title { text-wrap: balance; }
.section-desc, .lead { text-wrap: pretty; }
#logoCanvas { touch-action: pan-y; }

/* 底部悬浮操作栏（仅手机） */
.m-bar { display: none; }

@media (max-width: 960px) {
  .nav-toggle { width: 44px; height: 44px; margin-right: -6px; padding: 0 6px; }
  .nav-links { max-height: calc(100svh - var(--nav-h)); overflow-y: auto; }
  .nav-links a:not(.btn) { padding: 15px 0; }
  body.menu-open .m-bar { transform: translateY(120%) !important; }
}

@media (max-width: 640px) {
  :root { --nav-h: 60px; }
  .nav-inner { padding-top: env(safe-area-inset-top); }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 36px; }
  .section-title { font-size: 25px; margin-bottom: 10px; }
  .section-desc { font-size: 15px; }
  .section-desc br { display: none; }
  .lead { font-size: 16px; }

  /* 首屏 */
  .hero { min-height: 100svh; padding: calc(var(--nav-h) + 28px) 0 48px; }
  .hero h1 { font-size: 38px; margin-bottom: 18px; }
  .eyebrow { font-size: 12px; padding: 5px 12px; margin-bottom: 22px; }
  .hero-sub { font-size: 15px; margin-bottom: 28px; }
  .hero-cta { gap: 12px; margin-bottom: 36px; }
  .hero-cta .btn { flex: 1; padding: 13px 14px; }
  .stats { gap: 0; justify-content: space-between; flex-wrap: nowrap; }
  .stat strong { font-size: 28px; }
  .stat span { font-size: 12px; }
  .hero-grid { gap: 28px; }
  .scroll-cue { display: none; }
  .visual-hint { font-size: 11px; letter-spacing: 1px; }

  .ecosystem { padding: 26px 0; }
  .marquee-track .llm { margin-right: 32px; }
  .marquee-track .llm img { width: 24px; height: 24px; }
  .marquee-track .llm b { font-size: 16px; }

  /* 单行横向滑动的标签 */
  .tabs, .case-filter { flex-wrap: nowrap; justify-content: flex-start; overflow-x: auto; margin-left: -16px; margin-right: -16px; padding: 2px 16px 6px; scrollbar-width: none; scroll-snap-type: x proximity; }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs button { flex: none; padding: 8px 18px; font-size: 14px; scroll-snap-align: start; }
  .case-filter { margin-bottom: 24px; }
  .tab-panels { padding: 20px; }
  .tab-panel h3 { font-size: 20px; }

  /* 核心业务 / 程序开发 */
  .b-ai h3 { font-size: 22px; }
  .big-num { font-size: 34px; }
  .dev-info h3 { font-size: 22px; }
  .dev-panel { min-height: 0; }
  .phone { width: 220px; height: 440px; }

  /* AI 能力演示：12 个场景改为横向滑动 */
  .demo-menu { position: relative; display: flex; overflow-x: auto; gap: 8px; margin: 0 -16px; padding: 2px 16px 8px; scrollbar-width: none; scroll-snap-type: x proximity; }
  .demo-menu::-webkit-scrollbar { display: none; }
  .demo-group { display: contents; }
  .demo-group h4 { display: none; }
  .demo-menu button { flex: none; padding: 9px 14px 9px 10px; border-radius: 999px; scroll-snap-align: start; box-shadow: none; }
  .demo-menu button:hover { transform: none; }
  .demo-menu svg { width: 28px; height: 28px; padding: 6px; border-radius: 50%; }
  .demo-menu b { font-size: 14px; white-space: nowrap; }
  .demo-chat { height: 440px; padding: 16px; }
  .msg { padding: 10px 13px; }
  .x-posters { max-width: none; }
  .x-posters b { font-size: 16px; }
  .x-track b { font-size: 12px; }
  .demo-input { padding: 12px 14px; }
  .demo-input span { font-size: 13px; }

  /* 合作模式 / 案例 / 研究 */
  .models { margin-bottom: 48px; }
  .model { padding: 24px; }
  .case-cover { height: 170px; }
  .case-cover strong { font-size: 34px; }
  .case-body { padding: 20px; }
  .case-body h3 { min-height: 0; }
  .ring { padding: 20px; }

  /* 共创计划 */
  .v-steps { margin-bottom: 40px; gap: 12px; }
  .v-steps li { display: grid; grid-template-columns: auto 1fr; column-gap: 14px; padding: 18px; }
  .v-steps li svg { grid-row: span 2; margin-bottom: 0; }
  .v-steps h3 { margin-bottom: 2px; }
  .v-who { gap: 8px; }
  .v-who b { font-size: 13px; padding: 5px 12px; }

  /* 关于：轨道图收进屏幕内 */
  .about-visual { max-width: 320px; }
  .p2 { right: 0; } .p3 { right: 0; } .p5 { left: 0; }

  /* FAQ */
  .faq summary { font-size: 15px; padding: 16px 18px; }
  .faq details p { padding: 0 18px 16px; font-size: 14px; }

  /* 表单：16px 字号避免 iOS 聚焦时自动放大 */
  .contact-form input, .contact-form select, .contact-form textarea { font-size: 16px; }
  .contact-list a { display: inline-block; padding: 10px 0; margin: -10px 0; }
  .contact-list p { font-size: 15px; }

  /* 底部悬浮操作栏 */
  .m-bar {
    display: flex; gap: 10px; position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, .94); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-top: 1px solid #e2e9ec; box-shadow: 0 -8px 24px -12px rgba(16, 24, 28, .2);
    transform: translateY(120%); transition: transform .35s ease;
  }
  .m-bar.show { transform: none; }
  .m-bar .btn { flex: 1; padding: 12px 10px; font-size: 15px; }
  .m-bar .btn-ghost { background: #fff; }
  .footer { padding-bottom: calc(80px + env(safe-area-inset-bottom)); }
}

@media (max-width: 380px) {
  .hero h1 { font-size: 34px; }
  .stat strong { font-size: 24px; }
  .brand-logo { height: 30px; }
}

/* 触屏设备：去掉依赖鼠标悬停的位移效果 */
@media (hover: none) {
  .bento-card:hover, .model:hover, .trust:hover, .case:hover, .insight:hover, .v-steps li:hover, .layer:hover, .value-card:hover { transform: none; }
  .case:hover .cover-art { transform: none; }
}