/* =========================================================
   量巡科技 QuantSyn Tech — 官网设计系统 v2
   设计语言：「深空 × 光子」
   参考：PsiQuantum(编辑排版) · Lightmatter(光子光效)
        SiFive/Ambiq(产品矩阵) · 玻色量子(栏目结构)
   ========================================================= */

:root {
  /* 深空底色 */
  --bg-deep: #04060f;
  --bg-900: #070b18;
  --bg-800: #0b1124;
  --bg-card: rgba(16, 24, 52, 0.5);
  --bg-card-hover: rgba(22, 32, 66, 0.7);

  /* 光子色谱 */
  --cyan: #35e0ff;
  --blue: #3d7bff;
  --violet: #8b5cf6;
  --pink: #f472b6;
  --grad-photon: linear-gradient(110deg, #35e0ff 0%, #3d7bff 40%, #8b5cf6 80%);
  --grad-soft: linear-gradient(135deg, rgba(53,224,255,.14), rgba(139,92,246,.14));

  /* 文本 */
  --text-strong: #f5f8ff;
  --text: #b9c2dc;
  --text-dim: #7d87a8;
  --line: rgba(120, 140, 210, 0.14);
  --line-strong: rgba(120, 140, 210, 0.3);

  --maxw: 1240px;
  --radius: 18px;
  --radius-sm: 10px;
  --glow: 0 20px 70px rgba(61, 123, 255, 0.22);

  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background-color: var(--bg-deep);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 量子隧道背景层（30% 不透明 = 70% 透明，叠加在深空底色之上，弱化以保证文字可读） */
.bg-tunnel {
  position: fixed; inset: 0; z-index: -3;
  background: url('../img/bg-quantum-tunnel.jpg') center / cover no-repeat;
  opacity: 0.3;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* 深空背景层（叠加在量子隧道图上，保证可读性） */
.bg-space {
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(1400px 700px at 85% -15%, rgba(139, 92, 246, 0.20), transparent 60%),
    radial-gradient(1000px 560px at -5% 8%, rgba(53, 224, 255, 0.14), transparent 55%),
    radial-gradient(800px 480px at 50% 115%, rgba(61, 123, 255, 0.16), transparent 60%),
    rgba(4, 6, 15, 0.35);
}
/* 光子束（Lightmatter 式斜向光束） */
.bg-beam {
  position: fixed; z-index: -1; pointer-events: none;
  width: 140vw; height: 320px; left: -20vw; top: 8%;
  background: linear-gradient(90deg, transparent, rgba(61,123,255,.07) 30%, rgba(53,224,255,.09) 50%, rgba(139,92,246,.07) 70%, transparent);
  transform: rotate(-8deg);
  filter: blur(2px);
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ============ 导航 ============ */
.header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(4, 6, 15, 0.7);
  border-bottom: 1px solid var(--line);
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: auto; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; color: var(--text-strong); font-size: 19px; letter-spacing: .5px; }
.brand .logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--grad-photon);
  display: grid; place-items: center;
  font-weight: 800; color: #fff; font-size: 15px;
  box-shadow: 0 6px 20px rgba(61, 123, 255, .5);
}
.brand small { display: block; font-size: 10px; font-weight: 500; color: var(--text-dim); letter-spacing: 1.5px; line-height: 1.2; }
.brand-stack { display: flex; flex-direction: column; gap: 4px; line-height: 1.15; align-items: stretch; }
.brand-sub { display: block; font-size: 11px; font-weight: 500; color: var(--text-dim); letter-spacing: 2px; min-width: 0; white-space: normal; text-align: justify; text-align-last: justify; text-justify: inter-character; }
.nav { display: flex; align-items: center; gap: 32px; }
.nav a { color: var(--text); font-size: 15px; position: relative; transition: color .2s; }
.nav a:hover, .nav a.active { color: var(--text-strong); }
.nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -25px; height: 2px;
  background: var(--grad-photon); border-radius: 2px;
}
.nav-toggle { display: none; background: none; border: none; color: var(--text-strong); font-size: 24px; cursor: pointer; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: none; transition: transform .2s, box-shadow .2s;
}
.btn-primary { background: var(--grad-photon); color: #fff; box-shadow: 0 8px 26px rgba(61, 123, 255, .4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(61, 123, 255, .55); }
.btn-ghost { background: transparent; color: var(--text-strong); border: 1px solid var(--line-strong); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ============ Hero ============ */
.hero { position: relative; padding: 130px 0 100px; overflow: hidden; min-height: 640px; }
.hero .container { position: relative; z-index: 2; }
.hero .eyebrow-num { color: var(--text-dim); font-size: 13px; letter-spacing: 4px; margin-bottom: 20px; }
.hero h1 {
  font-size: clamp(38px, 5.6vw, 72px); line-height: 1.12; color: var(--text-strong);
  font-weight: 800; letter-spacing: -1px; margin-bottom: 26px;
}
.hero h1 .grad { background: var(--grad-photon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 19px; color: var(--text); max-width: 640px; margin-bottom: 40px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-canvas { position: absolute; inset: 0; z-index: 1; }
.hero-hint { position: absolute; right: 40px; bottom: 30px; z-index: 2; color: var(--text-dim); font-size: 12px; letter-spacing: 1px; opacity: .7; }

.badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 18px; border-radius: 999px; font-size: 13px;
  color: var(--cyan); background: rgba(53, 224, 255, .07);
  border: 1px solid rgba(53, 224, 255, .28); margin-bottom: 28px;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* ============ 区块 ============ */
.section { padding: 96px 0; position: relative; }
.section-head { max-width: 800px; margin: 0 auto 60px; text-align: center; }
.section-head.left { text-align: left; margin-left: 0; }
.section-head .eyebrow { color: var(--cyan); font-size: 13px; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 16px; display: flex; align-items: center; gap: 12px; justify-content: center; }
.section-head.left .eyebrow { justify-content: flex-start; }
.section-head .eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--cyan); }
.section-head .eyebrow::after { content: ""; width: 28px; height: 1px; background: var(--cyan); }
.section-head h2 { font-size: clamp(28px, 3.8vw, 46px); color: var(--text-strong); font-weight: 800; margin-bottom: 18px; letter-spacing: -.5px; line-height: 1.25; }
.section-head p { color: var(--text-dim); font-size: 16px; }
.lead { max-width: 780px; margin: 0 auto 40px; color: var(--text-dim); font-size: 16px; line-height: 1.95; text-align: center; }
.form-ok { padding: 28px 24px; border: 1px solid rgba(53, 224, 255, .35); border-radius: var(--radius); background: rgba(53, 224, 255, .08); color: var(--text-strong); font-size: 16px; text-align: center; }

/* 人机验证（算术验证码） */
.form-captcha { margin-top: 18px; padding: 16px 16px 18px; border: 1px solid rgba(120,140,210,.22); border-radius: var(--radius); background: rgba(13,18,38,.5); }
.form-captcha > label { margin-top: 0; }
.captcha-row { display: flex; align-items: center; gap: 10px; margin: 4px 0 10px; }
.captcha-q { flex: 1; font-size: 16px; font-weight: 600; letter-spacing: .5px; color: var(--text-strong);
  background: rgba(53,224,255,.08); border: 1px dashed rgba(53,224,255,.35); border-radius: 9px; padding: 11px 14px; }
.captcha-refresh { width: 42px; height: 42px; flex: none; border-radius: 9px; cursor: pointer;
  border: 1px solid rgba(120,140,210,.3); background: rgba(255,255,255,.04); color: var(--cyan); font-size: 20px; line-height: 1; }
.captcha-refresh:hover { border-color: var(--cyan); color: #fff; }
.form-hint { font-size: 12.5px; margin-top: 7px; min-height: 1px; }
.form-hint.is-err { color: #f9a8d4; }
.form-hint.is-ok { color: #7ef0c0; }

/* ============ 数据带 ============ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat-card { background: var(--bg-900); padding: 40px 28px; text-align: center; transition: background .3s; }
.stat-card:hover { background: var(--bg-800); }
.stat-card .num { font-size: 46px; font-weight: 800; line-height: 1; background: var(--grad-photon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-card .label { color: var(--text-dim); font-size: 14px; margin-top: 12px; }

/* ============ 卡片 ============ */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px 30px; transition: transform .3s, border-color .3s, box-shadow .3s, background .3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .35s; pointer-events: none;
  background: radial-gradient(420px 240px at var(--mx, 50%) var(--my, 0%), rgba(53,224,255,.12), transparent 70%);
}
.card::after {
  content: ""; position: absolute; top: 0; left: 10%; right: 10%; height: 1px; opacity: 0; transition: opacity .35s;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}
.card:hover { transform: translateY(-8px); border-color: var(--line-strong); box-shadow: var(--glow); background: var(--bg-card-hover); }
.card:hover::before, .card:hover::after { opacity: 1; }
.card .num-idx { font-size: 13px; color: var(--text-dim); letter-spacing: 2px; margin-bottom: 18px; }
.card .ico {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid var(--line-strong);
  font-size: 25px; margin-bottom: 22px;
}
.card h3 { color: var(--text-strong); font-size: 21px; margin-bottom: 12px; }
.card p { color: var(--text-dim); font-size: 15px; }
.card .tag { display: inline-block; margin-top: 18px; font-size: 14px; color: var(--cyan); }

/* ============ P-bit 量子比特交互元素 ============ */
.pbit-row { display: flex; gap: 34px; justify-content: center; flex-wrap: wrap; margin: 50px 0 10px; }
.pbit {
  width: 84px; height: 84px; border-radius: 50%; position: relative; cursor: pointer;
  background: radial-gradient(circle at 32% 30%, rgba(53,224,255,.35), rgba(11,17,36,.9) 65%);
  border: 1px solid var(--line-strong);
  display: grid; place-items: center;
  font-size: 26px; font-weight: 800; color: var(--cyan);
  transition: transform .25s, box-shadow .25s;
  user-select: none;
}
.pbit::before {
  content: ""; position: absolute; inset: -7px; border-radius: 50%;
  border: 1px dashed rgba(53,224,255,.3);
  animation: orbit 9s linear infinite;
}
.pbit::after {
  content: ""; position: absolute; width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 10px var(--cyan);
  top: -10px; left: 50%; transform-origin: 0 52px;
  animation: orbit 3.5s linear infinite;
}
@keyframes orbit { to { transform: rotate(360deg); } }
.pbit:hover { transform: scale(1.14); box-shadow: 0 0 40px rgba(53,224,255,.45); }
.pbit:hover::after { animation-duration: .7s; }
.pbit.flipping { animation: pbitflicker .1s linear infinite; }
@keyframes pbitflicker { 50% { color: var(--pink); text-shadow: 0 0 14px var(--pink); } }
.pbit.collapsed-0 { color: var(--cyan); text-shadow: 0 0 18px var(--cyan); }
.pbit.collapsed-1 { color: var(--pink); text-shadow: 0 0 18px var(--pink); background: radial-gradient(circle at 32% 30%, rgba(244,114,182,.35), rgba(11,17,36,.9) 65%); }
.pbit-caption { text-align: center; color: var(--text-dim); font-size: 13.5px; }
.pbit-caption b { color: var(--cyan); }

/* 点击坍缩涟漪 */
.q-ripple {
  position: fixed; pointer-events: none; z-index: 999;
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--cyan);
  transform: translate(-50%, -50%);
  animation: qripple .8s ease-out forwards;
}
.q-ripple.r2 { border-color: var(--violet); animation-duration: 1.05s; }
.q-ripple.r3 { border-color: var(--pink); animation-duration: 1.3s; }
@keyframes qripple {
  from { opacity: .9; width: 12px; height: 12px; }
  to { opacity: 0; width: 180px; height: 180px; }
}
.q-spark {
  position: fixed; pointer-events: none; z-index: 999;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 8px var(--cyan);
  animation: qspark .9s ease-out forwards;
}
@keyframes qspark {
  from { opacity: 1; transform: translate(0,0) scale(1); }
  to { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(.2); }
}

/* ============ 技术特性区块 ============ */
.feature { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; margin-bottom: 90px; }
.feature.rev .visual { order: 2; }
.feature .visual {
  height: 360px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(16,24,52,.7), rgba(7,11,24,.9));
  position: relative; overflow: hidden; display: grid; place-items: center;
}
.feature .visual canvas { position: absolute; inset: 0; }
.feature .visual .chip {
  width: 170px; height: 170px; border-radius: 22px;
  background: linear-gradient(145deg, #16204a, #090e22);
  border: 1px solid var(--line-strong); box-shadow: var(--glow);
  display: grid; place-items: center; text-align: center;
  font-weight: 800; color: var(--cyan); font-size: 21px; line-height: 1.3;
  position: relative; z-index: 2; transition: transform .3s;
}
.feature .visual:hover .chip { transform: scale(1.05) rotate(-2deg); }
.feature .visual .chip small { display: block; font-size: 11px; color: var(--text-dim); font-weight: 500; letter-spacing: 1px; margin-top: 6px; }
.feature .visual .chip::after {
  content: ""; position: absolute; inset: -2px; border-radius: 22px;
  background: conic-gradient(from 0deg, transparent, rgba(53,224,255,.6), transparent 35%);
  animation: spin 5s linear infinite; z-index: -1;
}
@keyframes spin { to { transform: rotate(360deg); } }
.feature .kicker { color: var(--cyan); font-size: 13px; letter-spacing: 3px; margin-bottom: 14px; }
.feature h3 { font-size: 30px; color: var(--text-strong); margin-bottom: 16px; letter-spacing: -.4px; }
.feature p { color: var(--text); font-size: 16px; margin-bottom: 20px; }
.feature ul.pts li { color: var(--text-dim); font-size: 15px; padding-left: 28px; position: relative; margin-bottom: 12px; }
.feature ul.pts li::before { content: "◈"; position: absolute; left: 0; color: var(--cyan); font-size: 13px; }
.feature ul.pts li b { color: var(--text-strong); }
.mini-stats { display: flex; gap: 34px; margin-top: 26px; flex-wrap: wrap; }
.mini-stats .ms .v { font-size: 30px; font-weight: 800; background: var(--grad-photon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.mini-stats .ms .k { font-size: 13px; color: var(--text-dim); margin-top: 4px; }

/* ============ 对比表 ============ */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.cmp { width: 100%; border-collapse: collapse; min-width: 720px; background: var(--bg-900); }
table.cmp th, table.cmp td { padding: 17px 20px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
table.cmp th { color: var(--text-strong); background: var(--bg-800); font-weight: 700; }
table.cmp td { color: var(--text-dim); }
table.cmp td.hl { color: var(--cyan); font-weight: 600; }
table.cmp tr:last-child td { border-bottom: none; }

/* ============ tabs ============ */
.tabs { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 44px; }
.tab {
  padding: 11px 24px; border-radius: 999px; border: 1px solid var(--line-strong);
  color: var(--text-dim); cursor: pointer; font-size: 15px; transition: all .2s; background: transparent; font-family: var(--font);
}
.tab.active, .tab:hover { color: var(--text-strong); border-color: var(--cyan); background: rgba(53,224,255,.08); }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade .4s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* ============ 团队 ============ */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.member { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; transition: transform .3s, border-color .3s; }
.member:hover { transform: translateY(-6px); border-color: var(--line-strong); }
.member .avatar {
  width: 68px; height: 68px; border-radius: 50%; margin-bottom: 18px;
  background: var(--grad-soft); border: 1px solid var(--line-strong);
  display: grid; place-items: center; font-size: 24px; font-weight: 800; color: var(--cyan);
}
.member h3 { color: var(--text-strong); font-size: 19px; }
.member .role { color: var(--cyan); font-size: 13.5px; margin: 4px 0 14px; }
.member p { color: var(--text-dim); font-size: 14px; }

/* ============ 时间线 ============ */
.timeline { position: relative; max-width: 880px; margin: 0 auto; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--cyan), var(--violet)); opacity: .4; }
.tl-item { position: relative; padding-bottom: 44px; }
.tl-item::before {
  content: ""; position: absolute; left: -33px; top: 6px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--grad-photon); box-shadow: 0 0 0 5px rgba(61,123,255,.15);
}
.tl-item .year { color: var(--cyan); font-weight: 700; margin-bottom: 6px; font-size: 15px; letter-spacing: 1px; }
.tl-item h3 { color: var(--text-strong); font-size: 19px; margin-bottom: 8px; }
.tl-item p { color: var(--text-dim); font-size: 15px; }

/* ============ 新闻 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .3s, border-color .3s; }
.news-card:hover { transform: translateY(-7px); border-color: var(--line-strong); }
.news-card .cover { height: 168px; background: var(--grad-soft); display: grid; place-items: center; font-size: 42px; border-bottom: 1px solid var(--line); }
.news-card .body { padding: 24px; }
.news-card .date { color: var(--cyan); font-size: 13px; margin-bottom: 8px; }
.news-card h3 { color: var(--text-strong); font-size: 18px; margin-bottom: 10px; line-height: 1.45; }
.news-card p { color: var(--text-dim); font-size: 14px; }

/* ============ 联系 ============ */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: 44px; }
.contact-info li { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); align-items: flex-start; }
.contact-info .k { font-size: 23px; }
.contact-info .v strong { display: block; color: var(--text-strong); font-size: 16px; margin-bottom: 4px; }
.contact-info .v span { color: var(--text-dim); font-size: 14px; }
.form { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.form label { display: block; color: var(--text); font-size: 14px; margin-bottom: 8px; }
.form input, .form textarea {
  width: 100%; background: var(--bg-900); border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 13px 15px; color: var(--text-strong); font-family: var(--font); font-size: 15px; margin-bottom: 20px; transition: border-color .2s;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--cyan); }
.form textarea { min-height: 120px; resize: vertical; }

/* ============ CTA 带 ============ */
.cta-band {
  border: 1px solid var(--line); border-radius: 24px; padding: 70px 40px; text-align: center;
  background:
    radial-gradient(600px 300px at 50% 120%, rgba(61,123,255,.2), transparent 70%),
    var(--bg-900);
  position: relative; overflow: hidden;
}
.cta-band h2 { font-size: clamp(26px, 3.4vw, 40px); color: var(--text-strong); font-weight: 800; margin-bottom: 16px; }
.cta-band p { color: var(--text-dim); margin-bottom: 34px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* ============ 页脚 ============ */
.footer { border-top: 1px solid var(--line); padding: 60px 0 32px; margin-top: 50px; background: rgba(5,8,18,.7); }
.footer .top { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 32px; }
.footer h4 { color: var(--text-strong); font-size: 15px; margin-bottom: 18px; }
.footer a { color: var(--text-dim); font-size: 14px; display: block; margin-bottom: 11px; transition: color .2s; }
.footer a:hover { color: var(--cyan); }
.footer .desc { color: var(--text-dim); font-size: 14px; max-width: 330px; margin-top: 16px; }
.footer .bottom { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: var(--text-dim); font-size: 13px; }

/* 页面标题（内页） */
.page-hero { padding: 90px 0 40px; text-align: center; }
.page-hero .eyebrow { color: var(--cyan); font-size: 13px; letter-spacing: 4px; margin-bottom: 16px; }
.page-hero h1 { font-size: clamp(32px, 4.4vw, 54px); color: var(--text-strong); font-weight: 800; letter-spacing: -.5px; margin-bottom: 16px; }
.page-hero p { color: var(--text-dim); font-size: 17px; max-width: 680px; margin: 0 auto; }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .nav { display: none; }
  .nav-toggle { display: block; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-4, .news-grid, .team-grid { grid-template-columns: 1fr 1fr; }
  .grid-2, .feature, .contact-wrap { grid-template-columns: 1fr; }
  .feature.rev .visual { order: 0; }
  .footer .top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4, .news-grid, .team-grid, .stats { grid-template-columns: 1fr; }
  .footer .top { grid-template-columns: 1fr; }
  .hero { padding: 80px 0 60px; min-height: auto; }
  .section { padding: 64px 0; }
}

/* ============ 百度地图 ============ */
.map-box { margin-top: 8px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: 0 14px 50px rgba(0, 0, 0, 0.4); background: var(--bg-800); }
.map-box iframe { width: 100%; height: 380px; border: 0; display: block; filter: saturate(1.05); }
.map-actions { margin-top: 16px; display: flex; gap: 12px; flex-wrap: wrap; }
.map-note { margin-top: 12px; color: var(--text-dim); font-size: 13px; line-height: 1.6; }

/* ============ 公众号二维码 ============ */
.wx-qr { margin-top: 14px; display: inline-flex; flex-direction: column; align-items: center; gap: 8px; background: #fff; padding: 10px; border-radius: 12px; box-shadow: 0 8px 26px rgba(0,0,0,.35); }
.wx-qr img { width: 104px; height: 104px; display: block; }
.wx-qr span { color: #1a2240; font-size: 12px; font-weight: 600; letter-spacing: .5px; }

/* ============ Logo 图片 ============ */
.logo-img { height: 90px; width: auto; display: block; object-fit: contain; }
@media (max-width: 600px) {
  .logo-img { height: 75px; }
}

/* ============ Logo 旁公司名 ============ */
.brand-text { font-size: 22px; font-weight: 700; color: var(--text-strong); letter-spacing: .5px; line-height: 1.1; white-space: nowrap; }
@media (max-width: 600px) {
  .brand-text { font-size: 16px; letter-spacing: 0; }
  .brand-sub { font-size: 10px; letter-spacing: 1px; }
}

/* =========================================================
   设计升级 v3 — 滚动叙事 · 微交互 · 技术原创可视化
   ========================================================= */

/* ============ 顶部滚动进度条 ============ */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  z-index: 300; pointer-events: none;
  background: linear-gradient(90deg, #35e0ff, #3d7bff 50%, #8b5cf6);
  box-shadow: 0 0 14px rgba(61, 123, 255, .7);
  transition: width .12s linear;
}

/* ============ 滚动揭示（多方向 + 错峰） ============ */
.reveal {
  opacity: 0;
  transform: translateY(38px);
  transition: opacity .9s cubic-bezier(.2,.7,.3,1), transform .9s cubic-bezier(.2,.7,.3,1), filter .9s ease;
  will-change: opacity, transform;
}
.reveal.left  { transform: translateX(-46px); }
.reveal.right { transform: translateX(46px); }
.reveal.zoom  { transform: scale(.92); }
.reveal.blur  { filter: blur(10px); transform: translateY(24px); }
/* .in 必须置于方向变体之后，确保 transform:none 覆盖方向位移 */
.reveal.in { opacity: 1; transform: none; filter: blur(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; filter: none !important; }
  .scroll-progress { display: none; }
}

/* ============ 视差辅助 ============ */
.parallax { will-change: transform; }

/* ============ 技术原创可视化容器 ============ */
.feature .visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 340px;
  background:
    radial-gradient(120% 120% at 50% 0%, rgba(61,123,255,.10), transparent 60%),
    linear-gradient(160deg, rgba(16,24,52,.6), rgba(7,11,24,.6));
  border: 1px solid var(--line);
  box-shadow: inset 0 0 60px rgba(8,12,30,.6);
}
.feature .visual canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.feature .visual .chip {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  z-index: 2;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 128px; height: 128px; border-radius: 22px;
  background: rgba(7, 11, 24, .72);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(6px);
  box-shadow: 0 0 30px rgba(61,123,255,.35), inset 0 0 22px rgba(53,224,255,.12);
  font-weight: 800; font-size: 24px; letter-spacing: 1px; color: var(--text-strong);
  text-align: center;
}
.feature .visual .chip small {
  margin-top: 6px; font-size: 9px; font-weight: 500; letter-spacing: .5px;
  color: var(--text-dim); line-height: 1.35;
}
.feature .visual .chip::after {
  content: ""; position: absolute; inset: -1px; border-radius: 22px; padding: 1px;
  background: var(--grad-photon);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: .8;
}
.viz-tag {
  position: absolute; left: 14px; top: 12px; z-index: 3;
  font-size: 11px; letter-spacing: 1.5px; color: var(--cyan);
  text-transform: uppercase; opacity: .8;
}
.viz-hint {
  position: absolute; right: 14px; bottom: 12px; z-index: 3;
  font-size: 11px; color: var(--text-dim); opacity: .6;
}

/* ============ 量子比特展示（qubit） ============ */
.qubit-stage {
  position: relative; border-radius: var(--radius); overflow: hidden;
  min-height: 300px; background: linear-gradient(160deg, rgba(16,24,52,.5), rgba(7,11,24,.7));
  border: 1px solid var(--line); display: flex; align-items: center; justify-content: center;
}
.qubit-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ============ 加入我们 / 招聘 ============ */
.join-hero .email-cta {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 22px; padding: 14px 28px; border-radius: 999px;
  font-size: 18px; font-weight: 700; color: #fff; text-decoration: none;
  background: var(--grad-photon);
  box-shadow: 0 14px 40px rgba(61,123,255,.4);
  transition: transform .25s ease, box-shadow .25s ease;
}
.join-hero .email-cta:hover { transform: translateY(-2px); box-shadow: 0 18px 50px rgba(61,123,255,.55); }

/* 邮箱横幅 */
.email-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding: 22px 28px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(53,224,255,.10), rgba(139,92,246,.10));
  border: 1px solid var(--line-strong);
  box-shadow: var(--glow);
}
.eb-left { display: flex; align-items: center; gap: 16px; }
.eb-icon { font-size: 30px; }
.eb-label { font-size: 12px; letter-spacing: 2px; color: var(--text-dim); text-transform: uppercase; }
.eb-mail { display: block; font-size: 24px; font-weight: 800; color: var(--text-strong); text-decoration: none; letter-spacing: .5px; }
.eb-mail:hover { color: var(--cyan); }
.eb-tip { color: var(--text-dim); font-size: 13px; margin: 0; }

/* 岗位列表 */
.section-sub { color: var(--text-dim); margin-top: 10px; }
.jd-list { display: flex; flex-direction: column; gap: 18px; margin-top: 30px; }
.jd-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: border-color .3s ease, box-shadow .3s ease;
}
.jd-card:hover { border-color: var(--line-strong); }
.jd-card.open { border-color: rgba(53,224,255,.45); box-shadow: 0 0 0 1px rgba(53,224,255,.25), var(--glow); }
.jd-head {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 22px 26px; background: none; border: 0; cursor: pointer; text-align: left; color: var(--text);
}
.jd-head:hover { background: rgba(120,140,210,.05); }
.jd-tag {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .5px;
  color: var(--cyan); border: 1px solid rgba(53,224,255,.4); padding: 3px 12px; border-radius: 999px; margin-bottom: 8px;
}
.jd-title h3 { font-size: 19px; margin: 0; color: var(--text-strong); }
.jd-sub { color: var(--text-dim); font-size: 13px; margin: 5px 0 0; }
.jd-toggle {
  flex: 0 0 auto; width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 300; line-height: 1; color: var(--cyan);
  border: 1px solid var(--line-strong); background: rgba(7,11,24,.5);
  transition: transform .3s ease, background .3s ease;
}
.jd-card.open .jd-toggle { transform: rotate(45deg); background: var(--grad-photon); color: #fff; border-color: transparent; }
.jd-body { max-height: 0; overflow: hidden; transition: max-height .45s ease; }
.jd-card.open .jd-body { max-height: 6000px; }
.jd-body-inner { padding: 4px 26px 28px; }
.jd-section { margin-top: 20px; }
.jd-section h4 {
  font-size: 15px; color: var(--cyan); margin: 0 0 10px; padding-left: 12px; position: relative;
}
.jd-section h4::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 4px; height: 14px; border-radius: 2px; background: var(--grad-photon);
}
.jd-section ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.jd-section li { position: relative; padding-left: 18px; color: var(--text); font-size: 14.5px; line-height: 1.7; }
.jd-section li::before { content: "▹"; position: absolute; left: 0; top: 0; color: var(--cyan); }
.jd-hiring { color: var(--text); font-size: 14.5px; }
.jd-hiring strong { color: var(--cyan); }

@media (max-width: 600px) {
  .eb-mail { font-size: 19px; }
  .jd-title h3 { font-size: 17px; }
  .jd-head { padding: 18px; }
  .jd-body-inner { padding: 4px 18px 22px; }
}