/* ═══════════════════════════════════════════════════════════════
   TARGON — Local Industrial Agent for Vacuum & Semiconductor
   Design system: industrial AI · dark tech · high-contrast
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #07090d;
  --bg-2: #0d1117;
  --bg-3: #141b24;
  --line: #1e2836;
  --line-2: #2a3746;
  --fg: #e8edf4;
  --fg-2: #9fb0c4;
  --fg-3: #66788f;
  /* 探氩品牌色：logo 蓝 (#5B9BFF) + 工业橙作强调 */
  --argon: #5b9bff;
  --argon-2: #3d7fe8;
  --argon-glow: rgba(91, 155, 255, .15);
  --amber: #f5a623;
  --amber-glow: rgba(245, 166, 35, .12);
  --danger: #ff6b5b;
  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1180px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── 背景网格（技术感）───────────────────────────────── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(91, 155, 255, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 155, 255, .03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 30%, transparent 78%);
  pointer-events: none;
  z-index: 0;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

a { color: var(--argon); text-decoration: none; transition: color .18s; }
a:hover { color: #7db4ff; }

/* ── 导航 ─────────────────────────────────────────────── */
header.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7, 9, 13, .82);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.nav-in { display: flex; align-items: center; gap: 28px; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.06rem;
        letter-spacing: -.02em; color: var(--fg); }
.logo svg { width: 26px; height: 26px; flex: 0 0 auto; }
.logo .tg { color: var(--argon); }
nav.links { display: flex; gap: 26px; margin-left: auto; align-items: center; }
nav.links a { color: var(--fg-2); font-size: .89rem; font-weight: 500; }
nav.links a:hover, nav.links a.on { color: var(--fg); }
.nav-cta {
  padding: 8px 16px; border-radius: 100px;
  background: var(--argon); color: #04120f !important;
  font-weight: 650; font-size: .85rem;
}
.nav-cta:hover { background: #7db4ff; }

/* ── Hero ─────────────────────────────────────────────── */
.hero { padding: 96px 0 76px; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .13em;
  text-transform: uppercase; color: var(--argon);
  border: 1px solid var(--line-2); background: rgba(91,155,255,.055);
  padding: 6px 13px; border-radius: 100px; margin-bottom: 26px;
}
.eyebrow::before { content:""; width:6px; height:6px; border-radius:50%;
                   background: var(--argon); box-shadow: 0 0 9px var(--argon); }
h1 {
  font-size: clamp(2.1rem, 5.2vw, 3.5rem); line-height: 1.13;
  letter-spacing: -.032em; font-weight: 780; margin-bottom: 22px; max-width: 15ch;
}
h1 .g { background: linear-gradient(96deg, var(--argon), #8fc2ff 55%, var(--amber));
        -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lede { font-size: 1.1rem; color: var(--fg-2); max-width: 60ch; margin-bottom: 34px; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 25px; border-radius: 100px; font-weight: 650; font-size: .93rem;
  border: 1px solid transparent; transition: all .18s; cursor: pointer;
}
.btn-p { background: var(--argon); color: #04120f; }
.btn-p:hover { background: #7db4ff; transform: translateY(-1px); color: #04120f; }
.btn-s { border-color: var(--line-2); color: var(--fg); background: transparent; }
.btn-s:hover { border-color: var(--argon); background: var(--argon-glow); color: var(--fg); }

/* ── 统计带 ───────────────────────────────────────────── */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; margin: 64px 0 0;
}
.stat { background: var(--bg-2); padding: 26px 22px; }
.stat .v { font-size: 1.85rem; font-weight: 760; letter-spacing: -.03em;
           font-variant-numeric: tabular-nums; color: var(--argon); }
.stat .v small { font-size: .95rem; color: var(--fg-3); font-weight: 500; }
.stat .k { font-size: .8rem; color: var(--fg-3); margin-top: 5px;
           text-transform: uppercase; letter-spacing: .07em; }

/* ── 区块 ─────────────────────────────────────────────── */
section { padding: 82px 0; }
section.tight { padding: 58px 0; }
.sec-head { margin-bottom: 44px; }
.sec-head .lbl {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--fg-3); margin-bottom: 12px; display: block;
}
h2 { font-size: clamp(1.5rem, 3.2vw, 2.15rem); letter-spacing: -.026em;
     font-weight: 740; line-height: 1.24; margin-bottom: 14px; }
h3 { font-size: 1.14rem; font-weight: 680; letter-spacing: -.014em; margin-bottom: 9px; }
.sec-head p { color: var(--fg-2); max-width: 68ch; font-size: 1.02rem; }

/* ── 卡片 ─────────────────────────────────────────────── */
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 22px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(266px, 1fr)); gap: 20px; }
.card {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px 28px;
  transition: border-color .2s, transform .2s;
  position: relative; overflow: hidden;
}
.card:hover { border-color: var(--line-2); transform: translateY(-2px); }
.card.feat { border-color: rgba(91,155,255,.32); }
.card.feat::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--argon), transparent);
}
.tag {
  display: inline-block; font-family: var(--mono); font-size: .70rem;
  letter-spacing: .11em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 5px; margin-bottom: 15px;
}
.tag.edge { background: var(--argon-glow); color: var(--argon); border: 1px solid rgba(91,155,255,.27); }
.tag.cloud { background: var(--amber-glow); color: var(--amber); border: 1px solid rgba(245,166,35,.25); }
.card p { color: var(--fg-2); font-size: .95rem; }
.card ul { list-style: none; margin-top: 17px; }
.card ul li {
  color: var(--fg-2); font-size: .9rem; padding: 6px 0 6px 21px; position: relative;
}
.card ul li::before {
  content: "▸"; position: absolute; left: 0; color: var(--argon); font-size: .82rem;
}

/* ── 案例数字 ─────────────────────────────────────────── */
.metrics { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 20px;
           padding-top: 18px; border-top: 1px solid var(--line); }
.metric .mv { font-size: 1.42rem; font-weight: 740; color: var(--amber);
              letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.metric .mk { font-size: .76rem; color: var(--fg-3); text-transform: uppercase;
              letter-spacing: .05em; }

/* ── 案例块 ───────────────────────────────────────────── */
.case { background: var(--bg-2); border: 1px solid var(--line);
        border-radius: var(--radius); padding: 32px 30px; margin-bottom: 18px; }
.case-top { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.case-top .num { font-family: var(--mono); font-size: .76rem; color: var(--fg-3); }
.case-top h3 { margin: 0; }
.case-top .who { color: var(--fg-3); font-size: .87rem; }
.case-body { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.case-body > div > .lbl { font-family: var(--mono); font-size: .69rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--argon); margin-bottom: 6px; display: block; }
.case-body p { color: var(--fg-2); font-size: .92rem; }
@media (max-width: 700px) { .case-body { grid-template-columns: 1fr; } }

/* ── 架构分层 ─────────────────────────────────────────── */
.arch { display: grid; gap: 10px; }
.layer {
  display: grid; grid-template-columns: 78px 1fr; gap: 20px; align-items: center;
  background: var(--bg-2); border: 1px solid var(--line);
  border-left: 3px solid var(--argon); border-radius: var(--radius-sm);
  padding: 18px 22px;
}
.layer.l2 { border-left-color: var(--amber); }
.layer.l1 { border-left-color: var(--line-2); }
.layer .ln { font-family: var(--mono); font-size: .78rem; color: var(--fg-3); }
.layer .lt { font-weight: 650; font-size: .96rem; margin-bottom: 4px; }
.layer .ld { color: var(--fg-3); font-size: .86rem; }
.pills { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 9px; }
.pill { font-family: var(--mono); font-size: .72rem; color: var(--fg-2);
        background: var(--bg-3); border: 1px solid var(--line);
        padding: 3px 9px; border-radius: 5px; }

/* ── POV ──────────────────────────────────────────────── */
.pov { border-left: 2px solid var(--amber); padding-left: 22px; }
.pov .pn { font-family: var(--mono); font-size: .72rem; color: var(--amber);
           letter-spacing: .1em; margin-bottom: 8px; }
.pov h3 { font-size: 1.16rem; }
.pov .en { color: var(--fg-3); font-size: .88rem; font-style: italic; margin-bottom: 11px; }
.pov p { color: var(--fg-2); font-size: .94rem; }

/* ── CTA 带 ───────────────────────────────────────────── */
.cta-band {
  background: linear-gradient(135deg, rgba(91,155,255,.10), rgba(245,166,35,.05));
  border: 1px solid rgba(91,155,255,.26); border-radius: var(--radius);
  padding: 46px 40px; text-align: center;
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { color: var(--fg-2); margin-bottom: 26px; max-width: 56ch; margin-left: auto;
              margin-right: auto; }

/* ── 表格 ─────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: .92rem; }
th, td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--line); }
th { color: var(--fg-3); font-size: .76rem; text-transform: uppercase;
     letter-spacing: .07em; font-weight: 600; }
td { color: var(--fg-2); }
td strong { color: var(--fg); font-weight: 620; }

/* ── 联系表单 ─────────────────────────────────────────── */
.form { display: grid; gap: 16px; max-width: 620px; }
.field label { display: block; font-size: .83rem; color: var(--fg-2); margin-bottom: 7px; font-weight: 550; }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px; background: var(--bg-3);
  border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  color: var(--fg); font-family: inherit; font-size: .93rem; transition: border-color .18s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--argon); box-shadow: 0 0 0 3px var(--argon-glow);
}
.field textarea { min-height: 108px; resize: vertical; }
.req { color: var(--danger); }

/* ── 页脚 ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--line); padding: 46px 0 34px; margin-top: 40px;
  background: var(--bg-2);
}
.foot-in { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 36px; }
.foot-in h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .09em;
              color: var(--fg-3); margin-bottom: 14px; font-weight: 600; }
.foot-in ul { list-style: none; }
.foot-in li { margin-bottom: 8px; }
.foot-in a { color: var(--fg-2); font-size: .88rem; }
.foot-in a:hover { color: var(--argon); }
.foot-in p { color: var(--fg-3); font-size: .87rem; }
.foot-bot { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line);
            display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.foot-bot span { color: var(--fg-3); font-size: .83rem; }
@media (max-width: 760px) { .foot-in { grid-template-columns: 1fr; gap: 26px; } }

/* ── 汉堡菜单 ─────────────────────────────────────────── */
.burger { display: none; background: none; border: 1px solid var(--line-2);
          border-radius: 8px; padding: 7px 9px; cursor: pointer; margin-left: auto; }
.burger span { display: block; width: 17px; height: 2px; background: var(--fg);
               border-radius: 2px; margin: 3px 0; }
@media (max-width: 860px) {
  .burger { display: block; }
  nav.links {
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--line);
    padding: 10px 24px 20px; display: none;
  }
  nav.links.open { display: flex; }
  nav.links a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { margin-top: 12px; text-align: center; }
}

/* ── 工具类 ───────────────────────────────────────────── */
.mono { font-family: var(--mono); font-size: .86em; }
.dim { color: var(--fg-3); }
.mt-s { margin-top: 12px; } .mt-m { margin-top: 26px; } .mt-l { margin-top: 44px; }
.center { text-align: center; }
.note {
  background: var(--bg-3); border-left: 3px solid var(--argon);
  border-radius: var(--radius-sm); padding: 16px 20px; margin-top: 22px;
  font-size: .9rem; color: var(--fg-2);
}
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 999; background: var(--argon);
              color: #04120f; padding: 9px 16px; border-radius: 6px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }