/* ==========================================================================
   ULTRACUT — Design System
   唯一依赖：系统字体栈。无外部字体、无 CDN、无远程图片。
   目的：国内与海外均可在首屏 1s 内完成渲染。
   ========================================================================== */

:root {
  /* 色板 */
  --bg: #05090f;
  --bg-elev: #080e17;
  --surface: #0b1420;
  --surface-2: #0f1b29;
  --surface-3: #142234;
  --line: rgba(160, 200, 225, 0.10);
  --line-strong: rgba(160, 200, 225, 0.20);
  --text: #eef4f9;
  --text-2: #94a9bd;
  --text-3: #607a90;
  --accent: #22f0c4;
  --accent-soft: rgba(34, 240, 196, 0.12);
  --accent-line: rgba(34, 240, 196, 0.34);
  --blue: #4d9dff;
  --warn: #ffb347;

  /* 排版 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC",
    Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  /* 尺寸 */
  --maxw: 1240px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 背景星点 + 网格，纯 CSS，无图片请求 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(900px 500px at 78% -8%, rgba(34, 240, 196, 0.07), transparent 70%),
    radial-gradient(700px 420px at 12% 12%, rgba(77, 157, 255, 0.055), transparent 70%),
    linear-gradient(rgba(160, 200, 225, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 200, 225, 0.028) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 64px 64px, 64px 64px;
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, #000 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 0%, #000 40%, transparent 85%);
}

img, svg { display: block; max-width: 100%; }

/* Grid 子项默认 min-width:auto，会被图片固有宽度撑破容器，统一放宽 */
.hero__grid > *,
.grid-products > *,
.grid-feats > *,
.grid-apps > *,
.about-grid > *,
.contact-grid > *,
.footer__grid > *,
.cta-band > *,
.pd > * { min-width: 0; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

p { margin: 0; }

::selection { background: var(--accent); color: #03110d; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 布局工具 ---------- */
.wrap {
  width: min(100% - 48px, var(--maxw));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.section { padding: 104px 0; position: relative; z-index: 1; }
.section--tight { padding: 72px 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 7px 13px;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--accent-soft);
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.section-head { max-width: 660px; margin-bottom: 56px; }
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  margin-bottom: 16px;
}
.section-head p {
  color: var(--text-2);
  font-size: 17px;
  line-height: 1.7;
}
.section-head--center { margin-inline: auto; text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform 0.35s var(--ease), background 0.25s, border-color 0.25s,
    box-shadow 0.35s, color 0.25s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--accent);
  color: #03110d;
  box-shadow: 0 8px 26px -8px rgba(34, 240, 196, 0.55);
}
.btn--primary:hover {
  box-shadow: 0 14px 36px -8px rgba(34, 240, 196, 0.7);
  background: #3efad2;
}

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: #eafffb;
}

.btn--sm { padding: 10px 18px; font-size: 14px; }
.btn--block { width: 100%; }

.arrow { transition: transform 0.35s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
}
.nav.is-stuck {
  background: rgba(5, 9, 15, 0.82);
  border-bottom-color: var(--line);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
}
.nav__inner {
  width: min(100% - 48px, var(--maxw));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 34px;
}

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand__mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(145deg, rgba(34, 240, 196, 0.2), rgba(34, 240, 196, 0.05));
  border: 1px solid var(--accent-line);
}
.brand__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
}
.brand__name em {
  font-style: normal;
  color: var(--accent);
}
.brand__sub {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--text-3);
  margin-top: 4px;
  text-transform: uppercase;
}

.nav__links { display: flex; align-items: center; gap: 4px; margin-right: auto; }
.nav__links a {
  position: relative;
  padding: 9px 14px;
  border-radius: 8px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-2);
  transition: color 0.2s, background 0.2s;
}
.nav__links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.045); }
.nav__links a.is-active { color: var(--text); }
.nav__links a.is-active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.nav__actions { display: flex; align-items: center; gap: 12px; }

/* 语言切换 */
.lang {
  display: flex;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}
.lang button {
  border: 0;
  background: transparent;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-3);
  transition: color 0.2s, background 0.2s;
}
.lang button.is-on {
  background: var(--accent);
  color: #03110d;
}

.burger {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  position: relative;
}
.burger span {
  position: absolute;
  left: 12px; right: 12px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s;
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 20.5px; }
.burger span:nth-child(3) { top: 26px; }
.burger.is-open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 55;
  background: rgba(5, 9, 15, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 20px 24px 40px;
  display: none;
  flex-direction: column;
  gap: 4px;
}
.drawer.is-open { display: flex; }
.drawer a {
  padding: 16px 4px;
  font-size: 18px;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}
.drawer .btn { margin-top: 20px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 76px 0 84px;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 62px);
  letter-spacing: -0.035em;
  margin-bottom: 22px;
  overflow-wrap: break-word;
}
.hero h1 .hl {
  background: linear-gradient(100deg, var(--accent) 10%, #9dffe4 55%, var(--blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  font-size: clamp(16px, 1.5vw, 18.5px);
  color: var(--text-2);
  line-height: 1.75;
  max-width: 540px;
  margin-bottom: 34px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 13px; margin-bottom: 40px; }

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 26px;
  max-width: 520px;
}
.hero__stat {
  flex: 1 1 0;
  min-width: 108px;
  padding-right: 18px;
}
.hero__stat + .hero__stat { padding-left: 22px; border-left: 1px solid var(--line); }
.hero__stat b {
  display: block;
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.hero__stat b i {
  font-style: normal;
  color: var(--accent);
  font-size: 17px;
  margin-left: 2px;
}
.hero__stat span {
  display: block;
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 5px;
}

/* Hero 产品视觉 */
.hero__visual {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 62% 42%, rgba(34, 240, 196, 0.12), transparent 58%),
    linear-gradient(160deg, #0c1826, #060c14);
  overflow: hidden;
  box-shadow: 0 40px 90px -50px rgba(34, 240, 196, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.hero__visual img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 2% 1%;
  position: relative;
  z-index: 1;
}
/* 扫描线效果 */
.hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(34, 240, 196, 0.16) 48%, transparent 52%);
  height: 34%;
  animation: scan 5.5s var(--ease) infinite;
  z-index: 2;
  pointer-events: none;
}
@keyframes scan {
  0%, 100% { transform: translateY(-40%); opacity: 0; }
  15% { opacity: 1; }
  70% { transform: translateY(280%); opacity: 0; }
}

.hero__badge {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 15px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(8, 16, 26, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: 12.5px;
  box-shadow: 0 16px 40px -22px #000;
}
.hero__badge b { font-size: 14px; font-variant-numeric: tabular-nums; }
.hero__badge small { color: var(--text-3); display: block; font-size: 11px; }
.hero__badge--a { top: 7%; left: 16px; animation: float 7s ease-in-out infinite; }
.hero__badge--b { bottom: 9%; right: 16px; animation: float 7s ease-in-out infinite 1.6s; }
.hero__badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  flex-shrink: 0;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------- 信任条 ---------- */
.trust {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 26px 0;
  background: rgba(255, 255, 255, 0.012);
}
.trust__inner {
  display: flex;
  align-items: center;
  gap: 14px 44px;
  flex-wrap: wrap;
  justify-content: center;
}
.trust__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}
.trust__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.01em;
  transition: color 0.2s;
}
.trust__item:hover { color: var(--text); }
.trust__item svg { color: var(--accent); opacity: 0.75; flex-shrink: 0; }

/* ---------- 产品卡 ---------- */
.grid-products {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 22px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, var(--surface), #070d15);
  overflow: hidden;
  transition: transform 0.45s var(--ease), border-color 0.3s, box-shadow 0.45s;
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-line);
  box-shadow: 0 30px 60px -35px rgba(34, 240, 196, 0.45);
}
.card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    radial-gradient(circle at 55% 48%, rgba(34, 240, 196, 0.09), transparent 62%),
    linear-gradient(150deg, #0d1a27, #060b12);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.card__media img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 3%;
  transition: transform 0.65s var(--ease);
}
.card:hover .card__media img { transform: scale(1.055); }

.card__tag {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  padding: 5px 9px;
  border-radius: 6px;
  background: rgba(34, 240, 196, 0.14);
  border: 1px solid var(--accent-line);
  color: var(--accent);
}
.card__tag--hot { background: rgba(255, 179, 71, 0.14); border-color: rgba(255, 179, 71, 0.4); color: var(--warn); }

.card__body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  flex: 1;
}
.card__model {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.card__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.card__desc {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.6;
  flex: 1;
}
.card__specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}
.chip {
  font-size: 11.5px;
  padding: 4px 9px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}
.card__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  padding-top: 15px;
  margin-top: 4px;
  border-top: 1px solid var(--line);
}
.price { display: flex; flex-direction: column; line-height: 1.25; }
.price__main {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.price__alt {
  font-size: 11.5px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  font-family: var(--mono);
}
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
.card__link svg { transition: transform 0.3s var(--ease); }
.card:hover .card__link svg { transform: translateX(4px); }

/* ---------- 优势卡 ---------- */
.grid-feats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}
.feat {
  position: relative;
  padding: 28px 24px 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.032), rgba(255, 255, 255, 0.008));
  transition: border-color 0.3s, background 0.3s;
  overflow: hidden;
}
.feat:hover { border-color: var(--accent-line); background: linear-gradient(170deg, rgba(34, 240, 196, 0.07), rgba(255, 255, 255, 0.01)); }
.feat__num {
  position: absolute;
  top: 16px; right: 20px;
  font-family: var(--mono);
  font-size: 34px;
  font-weight: 700;
  color: rgba(160, 200, 225, 0.09);
  letter-spacing: -0.04em;
  line-height: 1;
}
.feat__icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent);
  margin-bottom: 18px;
}
.feat h3 { font-size: 16.5px; margin-bottom: 9px; letter-spacing: -0.02em; }
.feat p { font-size: 13.5px; color: var(--text-2); line-height: 1.65; }

/* ---------- 参数表 ---------- */
.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  -webkit-overflow-scrolling: touch;
}
table.spec {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
  font-size: 14px;
}
table.spec th,
table.spec td {
  padding: 15px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
table.spec thead th {
  background: rgba(255, 255, 255, 0.032);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
  white-space: nowrap;
}
table.spec tbody tr:last-child td { border-bottom: 0; }
table.spec tbody tr:hover { background: rgba(34, 240, 196, 0.035); }
table.spec td:first-child {
  color: var(--text-2);
  font-weight: 500;
  white-space: nowrap;
}
table.spec td.val {
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-weight: 600;
}
table.spec td.muted { color: var(--text-3); }

/* ---------- 应用场景 ---------- */
.grid-apps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
}
.app {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.3s;
  min-height: 168px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.app:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.app__glow {
  position: absolute;
  inset: auto -30% -60% -30%;
  height: 140px;
  background: radial-gradient(ellipse at center, rgba(34, 240, 196, 0.22), transparent 70%);
  opacity: 0.5;
  transition: opacity 0.4s;
}
.app:hover .app__glow { opacity: 1; }
.app__icon { color: var(--accent); margin-bottom: auto; opacity: 0.85; }
.app h4 { font-size: 15.5px; margin-bottom: 6px; position: relative; }
.app p { font-size: 12.5px; color: var(--text-3); position: relative; line-height: 1.55; }

/* ---------- CTA 区块 ---------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-line);
  background:
    radial-gradient(circle at 15% 20%, rgba(34, 240, 196, 0.14), transparent 55%),
    radial-gradient(circle at 88% 80%, rgba(77, 157, 255, 0.13), transparent 55%),
    linear-gradient(160deg, #0c1a26, #060d15);
  padding: 60px 48px;
  display: grid;
  grid-template-columns: 1.4fr 0.85fr;
  gap: 40px;
  align-items: center;
  overflow: hidden;
}
.cta-band h2 { font-size: clamp(26px, 3.2vw, 38px); margin-bottom: 14px; }
.cta-band p { color: var(--text-2); font-size: 16px; max-width: 520px; }
.cta-band__actions { display: flex; flex-direction: column; gap: 12px; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 34px;
  background: #04070c;
  position: relative;
  z-index: 1;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line);
}
.footer__brand p {
  font-size: 13.5px;
  color: var(--text-3);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 300px;
}
.footer h5 {
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
  margin: 0 0 16px;
}
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.footer ul a {
  font-size: 13.5px;
  color: var(--text-2);
  transition: color 0.2s;
}
.footer ul a:hover { color: var(--accent); }
.footer__contact li {
  font-size: 13.5px;
  color: var(--text-2);
  display: flex;
  gap: 9px;
  align-items: flex-start;
  line-height: 1.55;
}
.footer__contact svg { color: var(--text-3); flex-shrink: 0; margin-top: 3px; }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
  padding-top: 26px;
  font-size: 12.5px;
  color: var(--text-3);
}
.footer__bottom a:hover { color: var(--accent); }
.footer__legal { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- 页面头（内页） ---------- */
.pagehead {
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(34, 240, 196, 0.045), transparent);
}
.pagehead h1 { font-size: clamp(30px, 4.2vw, 50px); margin-bottom: 16px; }
.pagehead p { color: var(--text-2); font-size: 17px; max-width: 620px; }
.crumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 20px;
  font-family: var(--mono);
}
.crumb a:hover { color: var(--accent); }
.crumb span { opacity: 0.4; }

/* ---------- 筛选 ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 34px;
}
.filter {
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.028);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-2);
  transition: all 0.25s;
}
.filter:hover { border-color: var(--line-strong); color: var(--text); }
.filter.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #03110d;
  font-weight: 600;
}
.filter small { opacity: 0.6; margin-left: 5px; font-variant-numeric: tabular-nums; }

/* ---------- 产品详情 ---------- */
.pd {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 52px;
  align-items: start;
}
.pd__gallery {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 55% 45%, rgba(34, 240, 196, 0.1), transparent 60%),
    linear-gradient(150deg, #0d1a27, #060b12);
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.pd__gallery img { width: 100%; height: 100%; object-fit: contain; padding: 4%; transition: transform 0.65s var(--ease); }
.pd__thumbs { display: flex; gap: 10px; margin-top: 12px; }
.pd__thumb {
  width: 74px; height: 74px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  padding: 0;
  cursor: pointer;
  transition: border-color 0.25s, background 0.25s;
}
.pd__thumb:hover { border-color: var(--line-strong); }
.pd__thumb.is-on { border-color: var(--accent); background: rgba(34, 240, 196, 0.06); }
.pd__thumb img { width: 100%; height: 100%; object-fit: contain; padding: 4%; transition: transform 0.3s var(--ease); }

.pd__title { font-size: clamp(26px, 3.4vw, 40px); margin-bottom: 12px; }
.pd__model {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 18px;
  display: block;
}
.pd__lead { color: var(--text-2); font-size: 16px; line-height: 1.75; margin-bottom: 26px; }
.pd__pricebox {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 20px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  margin-bottom: 26px;
}
.pd__pricebox .price__main { font-size: 30px; }
.pd__pricebox .price__alt { font-size: 12.5px; }
.pd__moq { font-size: 12.5px; color: var(--text-3); text-align: right; }
.pd__moq b { color: var(--text); font-variant-numeric: tabular-nums; }

.pd__bullets { display: grid; gap: 13px; margin-bottom: 30px; }
.pd__bullet {
  display: flex;
  gap: 11px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}
.pd__bullet svg { color: var(--accent); flex-shrink: 0; margin-top: 3px; }

.spec-group { margin-bottom: 34px; }
.spec-group h3 {
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.spec-list { display: grid; gap: 0; }
.spec-row {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(160, 200, 225, 0.08);
  font-size: 14px;
}
.spec-row:last-child { border-bottom: 0; }
.spec-row dt { color: var(--text-3); }
.spec-row dd {
  margin: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

/* ---------- 表单 ---------- */
.form-card {
  padding: 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, var(--surface), #070d15);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.01em;
}
.field label .req { color: var(--accent); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.028);
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  transition: border-color 0.2s, background 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a9bd' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.field textarea { min-height: 110px; resize: vertical; line-height: 1.6; }
.field input::placeholder,
.field textarea::placeholder { color: var(--text-3); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(34, 240, 196, 0.045);
}
.field select option { background: #0b1420; color: var(--text); }
.form-note {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.6;
  margin-top: 4px;
}
.form-ok {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: #b7ffee;
  font-size: 13.5px;
  margin-top: 16px;
}
.form-ok.is-on { display: flex; }

/* ---------- 关于页 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.about-copy h2 { font-size: clamp(26px, 3.2vw, 38px); margin-bottom: 18px; }
.about-copy p {
  color: var(--text-2);
  font-size: 15.5px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 34px;
}
.stat-cell {
  background: var(--surface);
  padding: 24px 20px;
  text-align: center;
}
.stat-cell b {
  display: block;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  line-height: 1.15;
}
.stat-cell b i { font-style: normal; color: var(--accent); font-size: 18px; }
.stat-cell span { font-size: 12px; color: var(--text-3); }

.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 8px; bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), rgba(34, 240, 196, 0.05));
}
.tl-item { position: relative; padding-bottom: 34px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -30px; top: 7px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(34, 240, 196, 0.14);
}
.tl-item b {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 6px;
}
.tl-item h4 { font-size: 16px; margin-bottom: 6px; }
.tl-item p { font-size: 13.5px; color: var(--text-2); line-height: 1.65; }

.visual-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 70% 25%, rgba(34, 240, 196, 0.1), transparent 55%),
    linear-gradient(150deg, #0c1826, #060b12);
  padding: 0;
  overflow: hidden;
  box-shadow: 0 30px 70px -50px rgba(34, 240, 196, 0.45);
}
.visual-panel img { width: 100%; height: auto; display: block; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: start;
}
.contact-item {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.contact-item:last-child { border-bottom: 0; }
.contact-item__icon {
  width: 40px; height: 40px;
  border-radius: 11px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent);
  flex-shrink: 0;
}
.contact-item h5 {
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0 0 5px;
}
.contact-item p { font-size: 14.5px; font-weight: 600; line-height: 1.5; }
.contact-item small { font-size: 12px; color: var(--text-3); font-weight: 400; }

/* 联系方式里的 mailto / tel 链接：颜色沿用父级，悬停变主题色（值来自 config.js） */
[data-site] a { color: inherit; text-decoration: none; }
[data-site] a:hover { color: var(--accent); }
[data-site][hidden], [data-icp-row][hidden] { display: none; }

.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq__q {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 15.5px;
  font-weight: 600;
  transition: color 0.2s;
}
.faq__q:hover { color: var(--accent); }
.faq__q .plus {
  width: 22px; height: 22px;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.35s var(--ease);
}
.faq__q .plus::before,
.faq__q .plus::after {
  content: "";
  position: absolute;
  background: var(--accent);
  border-radius: 2px;
  transition: opacity 0.3s;
}
.faq__q .plus::before { left: 50%; top: 5px; bottom: 5px; width: 1.5px; transform: translateX(-50%); }
.faq__q .plus::after { top: 50%; left: 5px; right: 5px; height: 1.5px; transform: translateY(-50%); }
.faq__q.is-open .plus { transform: rotate(135deg); }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.faq__a p {
  padding: 0 0 22px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 90%;
}

/* ---------- 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__grid { grid-template-columns: 1fr; gap: 44px; }
  .hero__visual { max-width: 560px; margin-inline: auto; order: -1; }
  .hero__stats { max-width: none; }
  .pd { grid-template-columns: 1fr; gap: 34px; }
  .pd__gallery { position: static; max-width: 560px; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .contact-grid { grid-template-columns: 1fr; gap: 34px; }
  .cta-band { grid-template-columns: 1fr; padding: 44px 32px; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 860px) {
  .nav__inner { gap: 14px; }
  /* 品牌副标题在窄屏会撑破导航，隐藏并允许收缩 */
  .brand { min-width: 0; }
  .brand__sub { display: none; }
  .brand__name { font-size: 16px; }
  .nav__actions { flex-shrink: 0; gap: 8px; }
  .lang button { padding: 5px 9px; font-size: 12px; }
  .nav__links { display: none; }
  .burger { display: block; }
  .nav__actions .btn--primary { display: none; }
  .section { padding: 76px 0; }
  .section--tight { padding: 56px 0; }
  .hero { padding: 48px 0 64px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 24px 20px; }
  .hero__badge--a { left: 8px; }
  .hero__badge--b { right: 8px; }
}

@media (max-width: 560px) {
  .wrap, .nav__inner { width: calc(100% - 32px); }
  .grid-products { grid-template-columns: 1fr; }
  .hero__stat { min-width: 0; flex-basis: 100%; padding: 0 0 14px; }
  .hero__stat + .hero__stat {
    padding: 14px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .hero__stats { gap: 0; }
  .footer__grid { grid-template-columns: 1fr; }
  .pagehead { padding: 40px 0 36px; }
  .card__media { aspect-ratio: 16 / 11; }
  .pd__thumbs { display: none; }
  .hero__badge { font-size: 11px; padding: 8px 11px; }
  .stat-cell b { font-size: 24px; }
}