/* ============================================================
 *  AXIOM 视觉系统
 *  方向：近黑底 + 单一强调色 + 等宽字体标签 + 细网格
 *  原则：克制。除了强调色，页面里几乎没有第二种彩度。
 * ============================================================ */

:root {
  --bg:            #08090c;
  --bg-elev:       #0d0f14;
  --bg-card:       #11141a;
  --bg-card-hover: #161a22;

  --line:          rgba(255, 255, 255, 0.08);
  --line-strong:   rgba(255, 255, 255, 0.16);

  --text:          #e9ebf1;
  --text-dim:      #98a0b0;
  --text-mute:     #646c7c;

  --accent:        #14a3f0;
  --accent-soft:   rgba(20, 163, 240, 0.12);
  --accent-line:   rgba(20, 163, 240, 0.32);

  --sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, "Menlo", "Consolas", monospace;

  --max: 1200px;
  --pad: 40px;
  --r:   4px;
  --r-lg: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: #04120e; }

/* ---------- 布局 ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

section { border-bottom: 1px solid var(--line); }

.pad-lg { padding: 120px 0; }
.pad-md { padding: 88px 0; }

@media (max-width: 860px) {
  :root { --pad: 22px; }
  .pad-lg { padding: 72px 0; }
  .pad-md { padding: 56px 0; }
}

/* ---------- 通用文字 ---------- */
.mono  { font-family: var(--mono); letter-spacing: 0.08em; }
.label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

h1, h2, h3 { font-weight: 500; letter-spacing: -0.01em; line-height: 1.25; }
h1 { font-size: clamp(34px, 5.2vw, 60px); }
h2 { font-size: clamp(26px, 3.4vw, 38px); }
h3 { font-size: 19px; }
.lead { font-size: clamp(15px, 1.6vw, 18px); color: var(--text-dim); max-width: 62ch; }

/* ---------- 区块标题 ---------- */
.sec-head { margin-bottom: 56px; }
.sec-head h2 { margin: 14px 0 12px; }
.sec-head .line-mark {
  width: 40px; height: 1px; background: var(--accent);
  margin-bottom: 18px; display: block;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 26px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  font-size: 14px; letter-spacing: 0.02em;
  transition: all .22s ease;
  cursor: pointer; background: transparent; color: var(--text);
}
.btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-primary {
  background: var(--accent); border-color: var(--accent); color: #04120e; font-weight: 500;
}
.btn-primary:hover { background: #4db8f7; border-color: #4db8f7; color: #04120e; }
.btn .arw { font-family: var(--mono); transition: transform .22s ease; }
.btn:hover .arw { transform: translateX(4px); }

/* ============================================================
 *  顶栏
 * ============================================================ */
.site-head {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8, 9, 12, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.head-in { display: flex; align-items: center; gap: 40px; height: 68px; }

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand img { height: 26px; width: auto; }
.brand-mark {
  width: 26px; height: 26px; flex-shrink: 0;
  border: 1px solid var(--accent-line);
  border-radius: var(--r);
  display: grid; place-items: center;
  background: var(--accent-soft);
}
.brand-mark span { width: 8px; height: 8px; background: var(--accent); }
.brand-name { font-family: var(--mono); font-size: 14px; letter-spacing: 0.14em; }

.nav { display: flex; gap: 34px; margin-left: auto; }
.nav a { font-size: 14px; color: var(--text-dim); transition: color .18s ease; }
.nav a:hover { color: var(--text); }

.head-act { display: flex; align-items: center; gap: 18px; }

.lang {
  display: flex; align-items: center; gap: 2px;
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 3px; font-family: var(--mono); font-size: 11px;
}
.lang button {
  background: none; border: 0; cursor: pointer;
  color: var(--text-mute); padding: 4px 9px; border-radius: 2px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
  transition: all .18s ease;
}
.lang button.on { background: var(--accent-soft); color: var(--accent); }

.burger { display: none; background: none; border: 0; cursor: pointer; padding: 6px; }
.burger i { display: block; width: 20px; height: 1px; background: var(--text); margin: 5px 0; }

@media (max-width: 860px) {
  .head-in { gap: 16px; }
  .nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--bg-elev); border-bottom: 1px solid var(--line);
    padding: 8px var(--pad) 20px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .burger { display: block; margin-left: auto; }
  .lang { order: -1; }
}

/* ============================================================
 *  首屏
 * ============================================================ */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }

.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center bottom; /* 取景窗口贴底：裁掉视频上方的黑边留白 */
  transform: scale(1.12); /* 以底部为锚点微放大：把 DNA 螺旋精确顶到垂直中心，上下留白对称 */
  transform-origin: center bottom;
  opacity: 0.92;
}
.hero-shade {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(to top, var(--bg) 0%, rgba(8, 9, 12, 0.4) 22%, transparent 48%),
    linear-gradient(rgba(8, 9, 12, 0.22), rgba(8, 9, 12, 0.22));
}
/* 文字浮现时，左侧压暗层淡入，保证标题可读 */
.hero-shade::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(8, 9, 12, 0.88) 0%, rgba(8, 9, 12, 0.5) 40%, transparent 66%);
  opacity: 0; transition: opacity 1s ease 0.1s;
}
.hero.on .hero-shade::after { opacity: 1; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 60% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 60% 40%, #000 20%, transparent 75%);
  opacity: 0.5;
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(circle, rgba(20, 163, 240, 0.10), transparent 62%);
  pointer-events: none;
}
.hero-in {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr; align-items: center;
  min-height: calc(100svh - 68px);
  padding: 110px 0 130px;
}
/* 开场：文字先隐藏，滚动 / 点击 / 触碰后浮现 */
.hero-copy {
  max-width: 640px;
  opacity: 0; transform: translateY(28px);
  transition: opacity 1s ease 0.15s, transform 1s ease 0.15s;
}
.hero.on .hero-copy { opacity: 1; transform: none; }

.hero-hint {
  position: absolute; left: 50%; bottom: 34px; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.22em;
  color: var(--text-mute); text-transform: uppercase;
  transition: opacity 0.6s ease;
  pointer-events: none;
}
.hero-hint i {
  width: 1px; height: 34px; background: var(--line-strong);
  position: relative; overflow: hidden;
}
.hero-hint i::after {
  content: ""; position: absolute; left: 0; top: -40%;
  width: 100%; height: 40%;
  background: var(--accent);
  animation: hint-drop 1.8s ease-in-out infinite;
}
@keyframes hint-drop {
  0% { top: -40%; } 70%, 100% { top: 110%; }
}
.hero.on .hero-hint { opacity: 0; }

.hero h1 { margin: 20px 0 26px; }
.hero .lead { margin-bottom: 38px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

@media (prefers-reduced-motion: reduce) {
  .hero-bg { display: none; }
  .hero-copy { opacity: 1; transform: none; transition: none; }
  .hero-hint { display: none; }
}

@media (max-width: 980px) {
  .hero-in { padding: 88px 0 72px; min-height: 0; }
  .hero-shade {
    background:
      linear-gradient(to bottom, rgba(8, 9, 12, 0.35) 0%, rgba(8, 9, 12, 0.78) 60%, var(--bg) 100%);
  }
}

/* ---------- 数字条 ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.stat { padding: 34px 0; text-align: left; border-right: 1px solid var(--line); padding-right: 20px; }
.stat:last-child { border-right: 0; }
.stat-t { font-size: 16px; font-weight: 500; color: var(--text); line-height: 1.2; letter-spacing: 0.01em; }
.stat-lb { font-size: 12.5px; color: var(--text-mute); margin-top: 8px; line-height: 1.55; padding-right: 16px; }
@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); padding: 24px 0; }
  .stat:nth-child(2n) { border-right: 0; }
}

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

.p-card {
  display: flex; flex-direction: column;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--bg-card); overflow: hidden;
  transition: all .26s ease;
}
.p-card:hover {
  border-color: var(--accent-line);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}
.p-thumb { position: relative; aspect-ratio: 4 / 3; background: #0b0d11; overflow: hidden; }
.p-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.p-card:hover .p-thumb img { transform: scale(1.04); }
.p-code {
  position: absolute; top: 14px; left: 14px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  padding: 5px 9px; border-radius: 3px;
  background: rgba(8, 9, 12, 0.72); border: 1px solid var(--line-strong); color: var(--accent);
}
.p-body { padding: 26px 26px 28px; display: flex; flex-direction: column; flex: 1; }
.p-cat { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--text-mute); text-transform: uppercase; }
.p-body h3 { margin: 12px 0 10px; }
.p-tag { color: var(--text-dim); font-size: 14.5px; line-height: 1.6; }
.p-more {
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em;
  color: var(--text-mute); display: flex; align-items: center; gap: 8px;
  transition: color .22s ease;
}
.p-card:hover .p-more { color: var(--accent); }

@media (max-width: 980px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }@media (max-width: 720px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* ============================================================
 *  技术底座 / 场景
 * ============================================================ */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.tile { background: var(--bg); padding: 34px 28px; transition: background .24s ease; }
.tile:hover { background: var(--bg-card); }
.tile-no { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 0.1em; }
.tile h3 { margin: 18px 0 10px; }
.tile p { color: var(--text-dim); font-size: 14.5px; line-height: 1.7; }

@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-4 { grid-template-columns: 1fr; } }

.scene {
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 38px 34px;
  background: linear-gradient(180deg, var(--bg-card), rgba(17, 20, 26, 0.4));
}
.scene-n {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; color: var(--text-mute);
}
.scene h3 { margin: 16px 0 12px; font-size: 21px; }
.scene p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- 客户墙 ---------- */
.clients { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.client {
  background: var(--bg); aspect-ratio: 2 / 1; display: grid; place-items: center;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; color: var(--text-mute);
  transition: color .22s ease, background .22s ease;
}
.client:hover { color: var(--text); background: var(--bg-card); }
@media (max-width: 860px) { .clients { grid-template-columns: repeat(3, 1fr); } }

/* ---------- CTA ---------- */
.cta-band { text-align: center; position: relative; overflow: hidden; }
.cta-band::before {
  content: ""; position: absolute; left: 50%; top: 0; transform: translateX(-50%);
  width: 70%; height: 1px;
  background: linear-gradient(to right, transparent, var(--accent-line), transparent);
}
.cta-band h2 { margin-bottom: 16px; }
.cta-band .lead { margin: 0 auto 34px; }

/* ---------- 页脚 ---------- */
.site-foot { background: var(--bg-elev); padding: 64px 0 30px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.foot-col h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-mute); font-weight: 400; margin-bottom: 18px; }
.foot-col ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.foot-col a, .foot-col li { font-size: 14px; color: var(--text-dim); }
.foot-col a:hover { color: var(--accent); }
.foot-bot {
  margin-top: 52px; padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.08em; color: var(--text-mute);
}
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .foot-grid { grid-template-columns: 1fr; gap: 30px; } }

/* ============================================================
 *  产品详情页
 * ============================================================ */
.crumb { padding: 26px 0; font-family: var(--mono); font-size: 12px; color: var(--text-mute); letter-spacing: 0.08em; }
.crumb a:hover { color: var(--accent); }

.pd-head { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; padding-bottom: 76px; }
.pd-head h1 { font-size: clamp(30px, 4.4vw, 50px); margin: 16px 0 20px; }
.pd-vis { aspect-ratio: 4 / 3; border: 1px solid var(--line-strong); border-radius: var(--r-lg); overflow: hidden; background: var(--bg-card); }
.pd-vis img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 980px) { .pd-head { grid-template-columns: 1fr; gap: 36px; padding-bottom: 48px; } }

.pd-body { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; }
@media (max-width: 900px) { .pd-body { grid-template-columns: 1fr; gap: 48px; } }

.hl-list { list-style: none; display: flex; flex-direction: column; gap: 20px; margin-top: 26px; }
.hl-list li { display: flex; gap: 16px; align-items: flex-start; font-size: 15px; color: var(--text-dim); line-height: 1.65; }
.hl-dot { width: 6px; height: 6px; background: var(--accent); margin-top: 10px; flex-shrink: 0; }

.spec-tbl { border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.spec-row { display: grid; grid-template-columns: 0.9fr 1.1fr; border-bottom: 1px solid var(--line); }
.spec-row:last-child { border-bottom: 0; }
.spec-k { padding: 16px 22px; background: var(--bg-elev); font-size: 13.5px; color: var(--text-mute); font-family: var(--mono); letter-spacing: 0.04em; }
.spec-v { padding: 16px 22px; font-size: 14.5px; color: var(--text); }
@media (max-width: 520px) { .spec-row { grid-template-columns: 1fr; } .spec-k { padding-bottom: 4px; } }

.pd-nav { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); }
.pd-nav a { padding: 30px 0; display: flex; flex-direction: column; gap: 6px; }
.pd-nav .mono { font-size: 11px; color: var(--text-mute); letter-spacing: 0.14em; }
.pd-nav strong { font-weight: 400; font-size: 16px; transition: color .2s ease; }
.pd-nav a:hover strong { color: var(--accent); }
.pd-nav .next { text-align: right; }

/* ---------- 滚动出现动画 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
 *  产品卡状态标 + 立场段 + 创新点对照
 * ============================================================ */
.p-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.p-status {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  padding: 3px 8px; border: 1px solid var(--accent-line); border-radius: 2px;
  color: var(--accent); white-space: nowrap;
}
.p-status.dev { color: var(--text-mute); border-color: var(--line-strong); }

.why { background: var(--bg-elev); }
.why-grid { display: grid; grid-template-columns: 220px 1fr; gap: 56px; }
.why-body {
  margin-top: 22px; color: var(--text-dim);
  font-size: clamp(16px, 1.9vw, 19px); line-height: 1.95; max-width: 66ch;
}
@media (max-width: 860px) {
  .why-grid { grid-template-columns: 1fr; gap: 22px; }
}

.inno-list { border-top: 1px solid var(--line); }
.inno-row {
  display: grid; grid-template-columns: 190px 1fr 1fr; gap: 32px;
  padding: 30px 0; border-bottom: 1px solid var(--line); align-items: start;
}
.inno-k { font-size: 15px; color: var(--text); }
.inno-tag {
  display: block; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 10px; color: var(--text-mute);
}
.inno-ours .inno-tag { color: var(--accent); }
.inno-c p { font-size: 14.5px; line-height: 1.75; color: var(--text-mute); }
.inno-ours p { color: var(--text); }
.inno-ours { border-left: 1px solid var(--accent-line); padding-left: 24px; }
@media (max-width: 900px) {
  .inno-row { grid-template-columns: 1fr; gap: 18px; }
  .inno-ours { border-left: 0; border-top: 1px solid var(--accent-line); padding-left: 0; padding-top: 16px; }
}

/* ---------- 创新点下的技术说明 ---------- */
.inno-note {
  margin-top: 44px;
  padding: 28px 30px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-left: 2px solid var(--accent);
  border-radius: var(--r);
}
.inno-note p {
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-dim);
  max-width: 84ch;
}
@media (max-width: 640px) {
  .inno-note { padding: 22px 20px; }
}

/* ---------- 双版本表 + 选型图集 ---------- */
.ver-tbl {
  margin-top: 40px; padding: 26px 28px;
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
  background: var(--bg-card);
}
.ver-row {
  display: grid; grid-template-columns: 110px 1fr auto; gap: 20px;
  align-items: center; padding: 16px 0;
}
.ver-row + .ver-row { border-top: 1px solid var(--line); }
.ver-code {
  font-family: var(--mono); font-size: 15px; letter-spacing: 0.06em;
  color: var(--accent); border: 1px solid var(--accent-line);
  border-radius: var(--r); padding: 7px 10px; text-align: center;
}
.ver-main strong { display: block; font-size: 15px; color: var(--text); }
.ver-steps { display: block; margin-top: 5px; font-family: var(--mono); font-size: 12.5px; color: var(--text-mute); }
.ver-fit { font-size: 13.5px; color: var(--text-dim); text-align: right; max-width: 260px; }
@media (max-width: 760px) {
  .ver-row { grid-template-columns: 90px 1fr; }
  .ver-fit { grid-column: 2; text-align: left; max-width: none; }
}

.gal-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.gal-item {
  margin: 0; border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden; background: #fafafa;
}
.gal-item img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.gal-item figcaption {
  padding: 11px 14px; font-family: var(--mono); font-size: 11.5px;
  letter-spacing: 0.08em; color: var(--text-mute);
  background: var(--bg-card); border-top: 1px solid var(--line);
}
@media (max-width: 980px) { .gal-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .gal-grid { grid-template-columns: 1fr; } }
.gal-grid-2 { grid-template-columns: repeat(2, 1fr); max-width: 980px; }
@media (max-width: 760px) { .gal-grid-2 { grid-template-columns: 1fr; } }