/* ============================================================
   华太智芯 · 官网样式
   定位：软件与 AI 能力供应商（对外输出）
   风格：深色科技 + 浅色内容区交替，重动效
   ============================================================ */
:root {
  --ink: #0f1724;
  --ink-2: #2c3745;
  --muted: #64707f;
  --muted-2: #8b96a5;
  --line: #e4e9f0;
  --line-2: #eef2f7;
  --bg: #ffffff;
  --bg-2: #f7f9fc;
  --bg-3: #eef3fa;
  --brand: #1c5bd8;
  --brand-d: #143f96;
  --brand-l: #eaf1fd;
  --accent: #0aa89a;
  --accent-l: #e8f7f5;
  /* 深色体系 */
  --d-bg: #0a1122;
  --d-bg-2: #0e1830;
  --d-card: rgba(255,255,255,.05);
  --d-line: rgba(255,255,255,.12);
  --d-text: #eaf1ff;
  --d-muted: #93a1bd;
  --d-brand: #5b95f7;
  --d-accent: #2ce0c8;
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --shadow: 0 1px 2px rgba(15,23,36,.04), 0 8px 24px -12px rgba(15,23,36,.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- 滚动入场动效（仅 JS 可用时启用） ---------- */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,.8,.3,1); transition-delay: var(--d, 0s); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(10,17,34,.55);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s, box-shadow .3s;
}
.nav.scrolled { background: rgba(10,17,34,.92); box-shadow: 0 6px 24px -12px rgba(0,0,0,.6); }
.nav-in {
  max-width: var(--maxw); margin: 0 auto; padding: 0 28px;
  height: 66px; display: flex; align-items: center; gap: 36px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.06rem; letter-spacing: .02em; color: #fff; }
.logo-mark {
  width: 26px; height: 26px; border-radius: 8px;
  background: linear-gradient(135deg, var(--d-brand) 0%, var(--d-accent) 100%);
  display: grid; place-items: center; color: #06101f; font-size: 13px; font-weight: 700;
}
.logo small { display: block; font-size: .66rem; font-weight: 500; color: rgba(255,255,255,.45); letter-spacing: .16em; }
.nav-links { display: flex; gap: 28px; list-style: none; margin-left: auto; font-size: .92rem; }
.nav-links a { color: rgba(255,255,255,.66); transition: color .18s; }
.nav-links a:hover { color: #fff; }
.nav-cta {
  padding: 9px 20px; border-radius: 999px; font-size: .88rem; font-weight: 600;
  background: var(--d-brand); color: #06101f; white-space: nowrap;
  transition: background .18s, transform .18s;
}
.nav-cta:hover { background: #7fb0fa; transform: translateY(-1px); }
.burger { display: none; margin-left: auto; background: none; border: 0; padding: 8px; cursor: pointer; }
.burger span { display: block; width: 20px; height: 2px; background: #fff; margin: 4px 0; border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: 100vh;
  display: flex; align-items: center;
  background: var(--d-bg);
  color: var(--d-text);
}
#fx { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none;
  animation: drift 16s ease-in-out infinite alternate;
}
.glow-a { width: 520px; height: 520px; top: -140px; right: -120px; background: rgba(43,90,220,.32); }
.glow-b { width: 460px; height: 460px; bottom: -160px; left: -140px; background: rgba(12,166,150,.22); animation-delay: -8s; }
@keyframes drift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(-40px, 34px) scale(1.12); }
}
.hero-grid {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center;
  padding-top: 96px; padding-bottom: 96px; width: 100%;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .8rem; font-weight: 600; letter-spacing: .1em; color: var(--d-brand);
  background: rgba(91,149,247,.14); border: 1px solid rgba(91,149,247,.3);
  border-radius: 999px; padding: 5px 14px; margin-bottom: 24px;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--d-accent); animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; box-shadow: 0 0 0 0 rgba(44,224,200,.5); } 50% { opacity: .6; box-shadow: 0 0 0 6px rgba(44,224,200,0); } }
h1 {
  font-size: clamp(2.3rem, 4.6vw, 3.4rem);
  line-height: 1.26; font-weight: 700; letter-spacing: -.01em; margin-bottom: 22px;
  color: #fff;
}
h1 em { font-style: normal; background: linear-gradient(92deg, var(--d-brand), var(--d-accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.05rem; color: var(--d-muted); max-width: 30em; margin-bottom: 14px; }
.hero p.lead b { color: rgba(255,255,255,.92); font-weight: 600; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; font-size: .94rem; font-weight: 600;
  transition: all .18s; border: 1px solid transparent; cursor: pointer;
}
.btn-p { background: var(--d-brand); color: #06101f; box-shadow: 0 8px 28px -8px rgba(91,149,247,.65); }
.btn-p:hover { background: #7fb0fa; transform: translateY(-2px); }
.btn-o { background: rgba(255,255,255,.06); color: rgba(255,255,255,.85); border-color: rgba(255,255,255,.2); }
.btn-o:hover { border-color: rgba(255,255,255,.5); color: #fff; }

/* hero 右侧玻璃面板 */
.panel {
  background: rgba(255,255,255,.055); border: 1px solid rgba(255,255,255,.14);
  border-radius: 20px; padding: 26px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.panel-h { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-h span { font-size: .78rem; letter-spacing: .12em; color: rgba(255,255,255,.5); font-weight: 600; }
.panel-h i { font-style: normal; font-size: .72rem; color: var(--d-accent); background: rgba(44,224,200,.12); padding: 3px 9px; border-radius: 999px; }
.cap-row { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-top: 1px dashed rgba(255,255,255,.14); }
.cap-row:first-of-type { border-top: 0; }
a.cap-row:hover .cap-txt b { color: var(--d-brand); }
.cap-num {
  width: 32px; height: 32px; border-radius: 9px; background: rgba(91,149,247,.14);
  display: grid; place-items: center; font-size: .78rem; font-weight: 700; color: var(--d-brand); flex: none;
}
.cap-txt b { display: block; font-size: .95rem; font-weight: 600; color: #fff; transition: color .18s; }
.cap-txt small { color: var(--d-muted); font-size: .82rem; }
.cap-state { margin-left: auto; flex: none; font-size: .7rem; font-weight: 600; color: var(--d-accent); background: rgba(44,224,200,.12); padding: 2px 9px; border-radius: 999px; white-space: nowrap; }
.panel-foot {
  margin-top: 14px; padding: 12px 14px; border-radius: 12px; background: rgba(255,255,255,.05);
  border: 1px dashed rgba(255,255,255,.16); font-size: .82rem; color: var(--d-muted);
}
.panel-foot b { color: rgba(255,255,255,.9); font-weight: 600; }

/* 滚动提示 */
.scroll-cue {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  z-index: 2; width: 24px; height: 38px; border: 2px solid rgba(255,255,255,.3);
  border-radius: 14px; display: flex; justify-content: center; padding-top: 7px;
}
.scroll-cue i {
  width: 4px; height: 9px; border-radius: 3px; background: rgba(255,255,255,.7);
  animation: cue 1.8s ease-in-out infinite;
}
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }

/* ---------- 数字条（深色） ---------- */
.stats { background: linear-gradient(180deg, var(--d-bg) 0%, var(--d-bg-2) 100%); color: var(--d-text); border-bottom: 1px solid rgba(255,255,255,.06); }
.stats-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 44px 0; }
.stat b { display: block; font-size: 1.75rem; font-weight: 700; letter-spacing: -.01em; color: #fff; }
.stat b span { font-size: .95rem; color: var(--d-muted); font-weight: 500; margin-left: 2px; }
.stat small { color: var(--d-muted); font-size: .86rem; }

/* ---------- 关键词跑马灯 ---------- */
.marquee { background: var(--d-bg-2); overflow: hidden; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
.marquee-track { display: flex; gap: 0; width: max-content; animation: marq 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-size: .86rem; font-weight: 600; letter-spacing: .06em; color: rgba(255,255,255,.38);
  padding: 0 26px; white-space: nowrap; position: relative;
}
.marquee-track span::after { content: "·"; position: absolute; right: -4px; color: rgba(44,224,200,.5); }
@keyframes marq { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 通用浅色版块 ---------- */
section.block { padding: 92px 0; }
section.alt { background: var(--bg-2); border-block: 1px solid var(--line-2); }
.head { max-width: 660px; margin-bottom: 48px; }
.head .kicker { font-size: .8rem; font-weight: 600; letter-spacing: .14em; color: var(--brand); margin-bottom: 12px; text-transform: uppercase; }
.head h2 { font-size: clamp(1.55rem, 2.6vw, 2.1rem); font-weight: 700; line-height: 1.4; letter-spacing: -.01em; }
.head p { color: var(--muted); margin-top: 14px; font-size: 1rem; }

/* ---------- 产品线大版块 ---------- */
.prod { padding: 88px 0; }
.prod + .prod { border-top: 1px solid var(--line-2); }
.prod-grid { display: grid; grid-template-columns: 300px 1fr; gap: 56px; align-items: start; }
.prod-side { position: sticky; top: 92px; }
.pno {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .12em;
  color: var(--brand); background: var(--brand-l); padding: 4px 12px; border-radius: 999px; margin-bottom: 16px;
}
.prod-side h2 { font-size: 1.9rem; font-weight: 700; letter-spacing: -.01em; line-height: 1.25; }
.prod-side h2 small { display: block; font-size: .92rem; font-weight: 500; color: var(--muted); margin-top: 6px; letter-spacing: 0; }
.ptags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
.ptags span {
  font-size: .76rem; font-weight: 600; color: var(--ink-2);
  background: #fff; border: 1px solid var(--line); padding: 3px 11px; border-radius: 999px;
}
.plink {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .9rem; font-weight: 600; color: var(--brand);
  transition: gap .2s;
}
.plink:hover { color: var(--brand-d); gap: 10px; }
.prod-note { margin-top: 26px; font-size: .82rem; color: var(--muted-2); line-height: 1.7; }
.plead { font-size: 1.04rem; color: var(--ink-2); max-width: 36em; margin-bottom: 34px; }
.plead b { font-weight: 600; color: var(--ink); }

/* 子系统卡片 */
.sub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.sub {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; transition: border-color .2s, transform .2s, box-shadow .2s;
}
.sub:hover { border-color: #c9d8ef; transform: translateY(-3px); box-shadow: var(--shadow); }
.sub .ic {
  width: 38px; height: 38px; border-radius: 10px; background: var(--brand-l);
  display: grid; place-items: center; margin-bottom: 16px; color: var(--brand); font-size: 17px;
}
.sub h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.sub > p { font-size: .88rem; color: var(--muted); }
.sub ul { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line-2); list-style: none; }
.sub ul li { font-size: .82rem; color: var(--muted); padding: 3px 0 3px 14px; position: relative; }
.sub ul li::before { content: ""; position: absolute; left: 0; top: .78em; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }

/* 能力清单（两列） */
.cap-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; margin-top: 30px; }
.cap-list li {
  list-style: none; font-size: .9rem; color: var(--ink-2);
  padding: 10px 0 10px 30px; position: relative; border-bottom: 1px dashed var(--line);
}
.cap-list li::before {
  content: "✓"; position: absolute; left: 4px; top: 8px;
  width: 18px; height: 18px; border-radius: 6px; background: var(--accent-l); color: var(--accent);
  font-size: .72rem; font-weight: 700; display: grid; place-items: center;
}

/* 场景双卡 */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 8px; }
.scene-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.scene-card .tag {
  display: inline-block; font-size: .74rem; font-weight: 600; color: var(--brand);
  background: var(--brand-l); padding: 2px 11px; border-radius: 999px; margin-bottom: 14px;
}
.scene-card h3 { font-size: 1.02rem; font-weight: 600; margin-bottom: 8px; }
.scene-card p { font-size: .88rem; color: var(--muted); }

/* 平台徽标行 */
.plat-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 30px; }
.plat-row .lab { font-size: .82rem; color: var(--muted-2); margin-right: 6px; }
.plat {
  font-size: .82rem; font-weight: 600; color: var(--ink-2);
  background: #fff; border: 1px solid var(--line); padding: 6px 14px; border-radius: 9px;
  display: inline-flex; align-items: center; gap: 7px;
}
.plat i { font-style: normal; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }

/* 三代时间线 */
.tl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: g; }
.tl-item { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px 20px; }
.tl-item::before {
  counter-increment: g; content: "第 " counter(g) " 代";
  display: inline-block; font-size: .74rem; font-weight: 700; color: var(--brand);
  background: var(--brand-l); padding: 3px 10px; border-radius: 999px; margin-bottom: 14px;
}
.tl-item.now::after {
  content: "当前主力"; position: absolute; top: 20px; right: 20px;
  font-size: .7rem; font-weight: 600; color: var(--accent); background: var(--accent-l);
  padding: 2px 9px; border-radius: 999px;
}
.tl-item h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.tl-item p { font-size: .86rem; color: var(--muted); }

/* ---------- 自有品牌产品（深色区） ---------- */
.band-dark {
  background:
    radial-gradient(50% 60% at 85% 10%, rgba(43,90,220,.18) 0%, rgba(0,0,0,0) 60%),
    linear-gradient(165deg, #0a1122 0%, #0e1c36 100%);
  color: #fff; padding: 92px 0;
}
.band-dark .kicker { font-size: .8rem; font-weight: 600; letter-spacing: .14em; color: #7ea6ee; margin-bottom: 12px; text-transform: uppercase; }
.band-dark h2 { font-size: clamp(1.55rem, 2.6vw, 2.1rem); font-weight: 700; line-height: 1.4; }
.band-dark .band-lead { color: rgba(255,255,255,.62); max-width: 40em; margin-top: 14px; font-size: 1rem; }
.brand-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
.pcard {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .2s, transform .2s, background .2s, box-shadow .2s;
}
a.pcard:hover, .pcard:hover {
  border-color: rgba(123,175,250,.5); transform: translateY(-4px);
  background: rgba(255,255,255,.08); box-shadow: 0 18px 40px -18px rgba(43,90,220,.45);
}
.pcard .media { aspect-ratio: 16 / 11; background: #f2f5fa; position: relative; overflow: hidden; }
.pcard .media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.pcard:hover .media img { transform: scale(1.05); }
.pcard .media svg { position: absolute; inset: 0; margin: auto; }
.pcard .pc-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.pcard h3 { font-size: 1.06rem; font-weight: 600; }
.pcard .cat { font-size: .78rem; color: rgba(255,255,255,.55); margin-top: 4px; }
.pcard p { font-size: .86rem; color: rgba(255,255,255,.62); margin-top: 12px; flex: 1; }
.pcard .pc-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.12); }
.pstate { font-size: .74rem; font-weight: 600; padding: 3px 11px; border-radius: 999px; }
.pstate.live { color: #6ee7d8; background: rgba(10,168,154,.16); }
.pstate.dev { color: #ffd479; background: rgba(255,196,86,.14); }
.pstate.plan { color: rgba(255,255,255,.6); background: rgba(255,255,255,.09); }
.pcard .plink2 { font-size: .84rem; font-weight: 600; color: #9cc0f5; }
.pcard .plink2:hover { color: #fff; }

/* ---------- 交付方式 ---------- */
.grid-4d { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.mode {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.mode:hover { border-color: #c9d8ef; transform: translateY(-3px); box-shadow: var(--shadow); }
.mode-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.mode h3 { font-size: 1.02rem; font-weight: 700; }
.mode .badge { font-size: .72rem; font-weight: 600; color: var(--brand); background: var(--brand-l); padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.mode > p { font-size: .88rem; color: var(--muted); }
.mode dl { display: grid; grid-template-columns: 4.2em 1fr; gap: 4px 10px; font-size: .84rem; border-top: 1px solid var(--line-2); padding-top: 12px; margin-top: auto; }
.mode dt { color: var(--muted-2); }
.mode dd { color: var(--ink-2); }

/* ---------- 为什么是我们 ---------- */
.why { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.why-item { display: flex; gap: 16px; padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.why-item .n { font-size: .82rem; font-weight: 700; color: var(--brand); background: var(--brand-l); width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; flex: none; }
.why-item h4 { font-size: .98rem; font-weight: 600; margin-bottom: 6px; }
.why-item p { font-size: .88rem; color: var(--muted); }

/* ---------- 流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: f; }
.flow-item { position: relative; padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: border-color .2s, transform .2s; }
.flow-item:hover { border-color: #c9d8ef; transform: translateY(-3px); }
.flow-item::before {
  counter-increment: f; content: "0" counter(f);
  font-size: .78rem; font-weight: 700; color: var(--brand); opacity: .55;
  display: block; margin-bottom: 12px; letter-spacing: .08em;
}
.flow-item h4 { font-size: .96rem; font-weight: 600; margin-bottom: 8px; }
.flow-item p { font-size: .85rem; color: var(--muted); }

/* ---------- CTA ---------- */
.cta { background: linear-gradient(160deg, #0f1b30 0%, #16305c 100%); color: #fff; padding: 88px 0; position: relative; overflow: hidden; }
.cta::before {
  content: ""; position: absolute; width: 480px; height: 480px; border-radius: 50%;
  background: rgba(91,149,247,.14); filter: blur(90px); top: -160px; right: -120px;
  animation: drift 18s ease-in-out infinite alternate;
}
.cta-in { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.cta h2 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); font-weight: 700; line-height: 1.4; margin-bottom: 16px; }
.cta p { color: rgba(255,255,255,.72); max-width: 34em; }
.cta-card { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); padding: 28px; }
.cta-card h4 { font-size: .95rem; font-weight: 600; margin-bottom: 18px; }
.cta-line { display: flex; gap: 12px; font-size: .9rem; padding: 9px 0; border-top: 1px solid rgba(255,255,255,.1); color: rgba(255,255,255,.82); }
.cta-line:first-of-type { border-top: 0; }
.cta-line span { color: rgba(255,255,255,.5); width: 4.5em; flex: none; }
.cta .btn-p { background: #fff; color: #0f1b30; box-shadow: none; margin-top: 26px; }
.cta .btn-p:hover { background: #eaf1fd; }

/* ---------- Footer ---------- */
footer { background: #0b1322; color: rgba(255,255,255,.5); font-size: .85rem; padding: 40px 0; }
.foot-in { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.foot-brand { color: #fff; font-weight: 600; font-size: .95rem; }
.foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
.foot-links a:hover { color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .prod-grid { grid-template-columns: 1fr; gap: 32px; }
  .prod-side { position: static; }
  .grid-4d { grid-template-columns: repeat(2, 1fr); }
  .sub-grid { grid-template-columns: 1fr; }
  .tl { grid-template-columns: 1fr; }
  .brand-grid { grid-template-columns: 1fr; }
  .cap-list { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .why { grid-template-columns: 1fr; }
  .cta-in { grid-template-columns: 1fr; gap: 32px; }
  .stats-in { grid-template-columns: repeat(2, 1fr); gap: 26px 16px; }
  .hero { min-height: 0; }
}
@media (max-width: 760px) {
  .nav-links {
    display: none; position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: rgba(10,17,34,.98);
    border-bottom: 1px solid rgba(255,255,255,.1); padding: 6px 28px 14px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 11px 0; }
  .nav-cta { display: none; }
  .burger { display: block; }
  section.block, .prod, .band-dark { padding: 64px 0; }
  .duo { grid-template-columns: 1fr; }
  .grid-4d { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .hero-grid { padding-top: 84px; padding-bottom: 84px; }
  .hero-btns .btn { flex: 1 1 100%; justify-content: center; }
  .scroll-cue { display: none; }
}

/* ---------- 下拉菜单 ---------- */
.nav-links li { position: relative; }
.nav-links li > a { display: inline-flex; align-items: center; gap: 5px; }
.nav-links li.has-drop > a::after {
  content: ""; width: 7px; height: 7px; flex: none;
  border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-2px); opacity: .6; transition: transform .2s;
}
.nav-links li.has-drop:hover > a::after { transform: rotate(45deg) translateY(0); }
.drop {
  position: absolute; top: calc(100% + 4px); left: 50%; transform: translate(-50%, 10px);
  min-width: 250px; padding: 10px; border-radius: 14px;
  background: rgba(13,22,42,.97); border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 20px 50px -18px rgba(0,0,0,.7);
  opacity: 0; visibility: hidden; transition: opacity .22s, transform .22s, visibility .22s;
}
.nav-links li:hover .drop, .nav-links li:focus-within .drop { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.drop a {
  display: flex; flex-direction: column; gap: 1px;
  padding: 10px 14px; border-radius: 9px; transition: background .16s;
}
.drop a b { font-size: .9rem; font-weight: 600; color: rgba(255,255,255,.9); }
.drop a small { font-size: .76rem; color: rgba(255,255,255,.5); }
.drop a:hover { background: rgba(91,149,247,.14); }
.drop a:hover b { color: #fff; }
.drop .drop-tag { font-size: .68rem; font-weight: 700; letter-spacing: .1em; color: var(--d-accent); padding: 4px 14px 6px; text-transform: uppercase; }

/* ---------- 子页 Hero ---------- */
.page-hero {
  position: relative; overflow: hidden; color: #fff;
  background: var(--d-bg); padding: 150px 0 76px;
}
.page-hero .hero-glow { z-index: 0; }
.ph-grid {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.02fr .98fr; gap: 52px; align-items: center;
}
.ph-kicker { font-size: .8rem; font-weight: 600; letter-spacing: .14em; color: var(--d-brand); text-transform: uppercase; margin-bottom: 14px; }
.page-hero h1 { font-size: clamp(2rem, 3.8vw, 2.9rem); margin-bottom: 18px; }
.page-hero p.lead { font-size: 1.05rem; color: var(--d-muted); max-width: 30em; margin-bottom: 10px; }
.ph-img {
  border-radius: 22px; overflow: hidden; border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 30px 70px -25px rgba(0,0,0,.75); position: relative;
}
.ph-img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 3/2; }
.ph-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.ph-badges span {
  font-size: .78rem; font-weight: 600; color: rgba(255,255,255,.8);
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  padding: 5px 13px; border-radius: 999px;
}

/* ---------- 图文分栏 ---------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.split.rev .sp-img { order: 2; }
.sp-img { border-radius: 20px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
.sp-img img { width: 100%; display: block; }
.sp-txt h3 { font-size: 1.35rem; font-weight: 700; margin-bottom: 14px; letter-spacing: -.01em; }
.sp-txt p { color: var(--muted); font-size: .95rem; margin-bottom: 12px; }
.sp-txt ul { list-style: none; margin-top: 6px; }
.sp-txt ul li { font-size: .9rem; color: var(--ink-2); padding: 7px 0 7px 22px; position: relative; }
.sp-txt ul li::before {
  content: ""; position: absolute; left: 2px; top: .95em;
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}

/* ---------- 规格表 ---------- */
.spec {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.spec > div { padding: 16px 20px; border-bottom: 1px solid var(--line-2); display: flex; gap: 14px; font-size: .9rem; }
.spec > div:nth-child(odd) { border-right: 1px solid var(--line-2); }
.spec > div:nth-last-child(-n+2) { border-bottom: 0; }
.spec b { color: var(--muted-2); font-weight: 500; flex: none; width: 6.5em; }
.spec span { color: var(--ink-2); }

/* ---------- 首页图文卡 ---------- */
.imgcard {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.imgcard:hover { border-color: #c9d8ef; transform: translateY(-3px); box-shadow: var(--shadow); }
.imgcard .ic-media { aspect-ratio: 16/9.4; overflow: hidden; background: var(--bg-3); }
.imgcard .ic-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.imgcard:hover .ic-media img { transform: scale(1.05); }
.imgcard .ic-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.imgcard h3 { font-size: 1.05rem; font-weight: 600; }
.imgcard .cat { font-size: .78rem; color: var(--muted-2); margin-top: 3px; }
.imgcard p { font-size: .88rem; color: var(--muted); margin-top: 10px; flex: 1; }
.imgcard .ic-foot { margin-top: 16px; padding-top: 13px; border-top: 1px solid var(--line-2); font-size: .84rem; font-weight: 600; color: var(--brand); }
.imgcard:hover .ic-foot { color: var(--brand-d); }

@media (max-width: 1020px) {
  .ph-grid, .split { grid-template-columns: 1fr; gap: 30px; }
  .split.rev .sp-img { order: 0; }
  .spec { grid-template-columns: 1fr; }
  .spec > div:nth-child(odd) { border-right: 0; }
  .spec > div:nth-last-child(-n+2) { border-bottom: 1px solid var(--line-2); }
  .spec > div:last-child { border-bottom: 0; }
}
@media (max-width: 760px) {
  .page-hero { padding: 120px 0 56px; }
  /* 移动端菜单：下拉平铺展示 */
  .nav-links .drop {
    position: static; opacity: 1; visibility: visible; transform: none;
    background: transparent; border: 0; box-shadow: none; padding: 0 0 4px 14px; min-width: 0;
  }
  .drop .drop-tag { display: none; }
  .drop a b { font-size: .86rem; font-weight: 500; color: rgba(255,255,255,.75); }
  .drop a { padding: 7px 0; }
}

/* ---------- 补充 ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.nav-links > li > a.on { color: #fff; font-weight: 600; }
@media (max-width: 1020px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- 品牌 Logo ---------- */
.logo img { height: 38px; width: auto; display: block; }
.foot-brand img { height: 44px; width: auto; display: block; }
@media (max-width: 760px) {
  .logo img { height: 30px; }
}