/* =========================================================
   DataOcean — Design System + 3 Skins
   midnight | daybreak | signal
   ========================================================= */

/* 默认极昼白 */
:root,
html[data-theme="daybreak"] {
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #2563eb;
  --blue-400: #1d4ed8;
  --blue-500: #2563eb;
  --blue-600: #1d4ed8;
  --blue-700: #1e40af;
  --cyan-400: #0284c7;
  --cyan-500: #0369a1;
  --accent: #2563eb;
  --accent-2: #0ea5e9;

  --bg: #f4f7fb;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-2: #f0f5fb;
  --surface-hover: #e8eef8;

  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(37, 99, 235, 0.28);
  --border-glow: rgba(37, 99, 235, 0.35);

  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --hero-grad: linear-gradient(120deg, #0f172a 0%, #1d4ed8 48%, #0284c7 100%);

  --atm-1: rgba(37, 99, 235, 0.12);
  --atm-2: rgba(14, 165, 233, 0.08);
  --atm-3: rgba(99, 102, 241, 0.06);
  --grid-line: rgba(15, 23, 42, 0.05);

  --header-bg: rgba(255, 255, 255, 0.82);
  --header-bg-solid: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(244, 247, 251, 0.96));
  --mega-bg:
    radial-gradient(ellipse 70% 90% at 10% 0%, rgba(37, 99, 235, 0.1), transparent 55%),
    radial-gradient(ellipse 45% 70% at 90% 30%, rgba(14, 165, 233, 0.08), transparent 50%),
    linear-gradient(180deg, #ffffff 0%, #f5f8fc 100%);
  --mega-border: rgba(37, 99, 235, 0.12);
  --mega-link: rgba(15, 23, 42, 0.88);
  --mega-desc: rgba(71, 85, 105, 0.72);
  --mega-title: rgba(100, 116, 139, 0.9);
  --mega-hover-bg: linear-gradient(90deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.03) 70%, transparent);
  --backdrop: linear-gradient(180deg, rgba(15, 23, 42, 0.18) 0%, rgba(15, 23, 42, 0.32) 100%);
  --chip-bg: linear-gradient(180deg, #ffffff, #f3f7fc);
  --panel-top: linear-gradient(160deg, rgba(37, 99, 235, 0.1), transparent 50%);

  --max: 1700px;
  --gutter: clamp(20px, 3vw, 48px);
  --radius: 12px;
  --radius-lg: 20px;
  --header-h: 72px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 0.35s;

  --shadow-card: 0 0 0 1px var(--border), 0 18px 40px -18px rgba(15, 23, 42, 0.18);
  --glow-blue: 0 0 60px -16px rgba(37, 99, 235, 0.35);
  --theme-switcher-bg: rgba(255, 255, 255, 0.94);
  --theme-switcher-border: rgba(15, 23, 42, 0.1);
}

/* Skin — 深空蓝 */
html[data-theme="midnight"] {
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --accent: #3b82f6;
  --accent-2: #22d3ee;

  --bg: #030712;
  --bg-elevated: #070d1a;
  --surface: #0a1224;
  --surface-2: #0f1a30;
  --surface-hover: #132038;

  --border: rgba(148, 163, 184, 0.12);
  --border-strong: rgba(96, 165, 250, 0.28);
  --border-glow: rgba(59, 130, 246, 0.45);

  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --hero-grad: linear-gradient(120deg, #fff 0%, var(--blue-300) 45%, var(--cyan-400) 100%);

  --atm-1: rgba(37, 99, 235, 0.22);
  --atm-2: rgba(6, 182, 212, 0.08);
  --atm-3: rgba(29, 78, 216, 0.1);
  --grid-line: rgba(148, 163, 184, 0.04);

  --header-bg: rgba(3, 7, 18, 0.78);
  --header-bg-solid: linear-gradient(180deg, rgba(0, 0, 0, 0.96), rgba(3, 7, 18, 0.94));
  --mega-bg:
    radial-gradient(ellipse 70% 90% at 12% 0%, rgba(37, 99, 235, 0.16), transparent 55%),
    radial-gradient(ellipse 50% 80% at 88% 20%, rgba(6, 182, 212, 0.08), transparent 50%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.98) 0%, rgba(5, 12, 28, 0.96) 55%, rgba(3, 7, 18, 0.94) 100%);
  --mega-border: rgba(96, 165, 250, 0.12);
  --mega-link: rgba(255, 255, 255, 0.82);
  --mega-desc: rgba(255, 255, 255, 0.32);
  --mega-title: rgba(255, 255, 255, 0.4);
  --mega-hover-bg: linear-gradient(90deg, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0.03) 70%, transparent);
  --backdrop: linear-gradient(180deg, rgba(0, 0, 0, 0.42) 0%, rgba(3, 7, 18, 0.55) 100%);
  --chip-bg: linear-gradient(180deg, rgba(15, 26, 48, 0.9), rgba(10, 18, 36, 0.9));
  --panel-top: linear-gradient(160deg, rgba(37, 99, 235, 0.12), transparent 50%);

  --shadow-card: 0 0 0 1px var(--border), 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --glow-blue: 0 0 80px -20px rgba(37, 99, 235, 0.55);
  --theme-switcher-bg: rgba(8, 14, 28, 0.92);
  --theme-switcher-border: rgba(148, 163, 184, 0.18);
}

/* Skin 3 — 信号青：OLED 黑 + 电青 */
html[data-theme="signal"] {
  --blue-300: #67e8f9;
  --blue-400: #22d3ee;
  --blue-500: #06b6d4;
  --blue-600: #0891b2;
  --blue-700: #0e7490;
  --cyan-400: #a5f3fc;
  --cyan-500: #22d3ee;
  --accent: #06b6d4;
  --accent-2: #34d399;

  --bg: #000000;
  --bg-elevated: #050808;
  --surface: #0a0f10;
  --surface-2: #0d1517;
  --surface-hover: #122022;

  --border: rgba(165, 243, 252, 0.1);
  --border-strong: rgba(34, 211, 238, 0.32);
  --border-glow: rgba(6, 182, 212, 0.5);

  --text: #ecfeff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --hero-grad: linear-gradient(120deg, #ecfeff 0%, #22d3ee 42%, #34d399 100%);

  --atm-1: rgba(6, 182, 212, 0.18);
  --atm-2: rgba(52, 211, 153, 0.08);
  --atm-3: rgba(14, 165, 233, 0.1);
  --grid-line: rgba(165, 243, 252, 0.05);

  --header-bg: rgba(0, 0, 0, 0.82);
  --header-bg-solid: linear-gradient(180deg, rgba(0, 0, 0, 0.98), rgba(5, 12, 14, 0.96));
  --mega-bg:
    radial-gradient(ellipse 70% 90% at 14% 0%, rgba(6, 182, 212, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 80% at 90% 25%, rgba(52, 211, 153, 0.08), transparent 50%),
    linear-gradient(180deg, #000 0%, #041014 55%, #020808 100%);
  --mega-border: rgba(34, 211, 238, 0.16);
  --mega-link: rgba(236, 254, 255, 0.88);
  --mega-desc: rgba(165, 243, 252, 0.35);
  --mega-title: rgba(165, 243, 252, 0.45);
  --mega-hover-bg: linear-gradient(90deg, rgba(6, 182, 212, 0.14), rgba(6, 182, 212, 0.03) 70%, transparent);
  --backdrop: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 20, 24, 0.62) 100%);
  --chip-bg: linear-gradient(180deg, rgba(8, 20, 22, 0.95), rgba(4, 12, 14, 0.95));
  --panel-top: linear-gradient(160deg, rgba(6, 182, 212, 0.14), transparent 50%);

  --shadow-card: 0 0 0 1px var(--border), 0 20px 50px -20px rgba(0, 0, 0, 0.75);
  --glow-blue: 0 0 80px -18px rgba(6, 182, 212, 0.55);
  --theme-switcher-bg: rgba(6, 12, 14, 0.94);
  --theme-switcher-border: rgba(34, 211, 238, 0.22);
}

html {
  color-scheme: light;
}

html[data-theme="midnight"],
html[data-theme="signal"] {
  color-scheme: dark;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC",
    system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* Background atmosphere */
.bg-atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.bg-atmosphere::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--atm-1), transparent 60%),
    radial-gradient(ellipse 40% 40% at 90% 10%, var(--atm-2), transparent 50%),
    radial-gradient(ellipse 50% 30% at 10% 40%, var(--atm-3), transparent 50%);
  transition: background 0.45s var(--ease);
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black, transparent);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(72px, 10vw, 120px);
  position: relative;
}

.section-header {
  max-width: 720px;
  margin-bottom: clamp(40px, 5vw, 64px);
}

.section-header.center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin-bottom: 16px;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: linear-gradient(90deg, var(--blue-500), transparent);
}

.section-title {
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: clamp(15px, 1.2vw, 17px);
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Header — Vercel-style mega menu */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    backdrop-filter var(--duration) var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled,
.site-header.menu-open {
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(1.2);
  border-bottom-color: var(--border);
}

.site-header.mega-open {
  background: var(--header-bg-solid);
  border-bottom-color: var(--mega-border);
}

.header-bar {
  height: var(--header-h);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  z-index: 2;
}

.logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo-text span {
  color: var(--blue-400);
}

/* Top nav row */
.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.nav-link,
.nav-trigger {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
  line-height: 1.2;
}

.nav-link:hover,
.nav-trigger:hover,
.nav-link.active,
.nav-trigger.active,
.nav-item.open .nav-trigger {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 1px;
  background: var(--blue-500);
  box-shadow: 0 0 8px var(--blue-500);
}

.nav-chevron {
  width: 12px;
  height: 12px;
  opacity: 0.55;
  transition: transform 0.25s var(--ease), opacity 0.2s;
  flex-shrink: 0;
}

.nav-item.open .nav-chevron,
.nav-trigger:hover .nav-chevron {
  opacity: 0.9;
}

.nav-item.open .nav-chevron {
  transform: rotate(180deg);
}

.nav-item {
  position: static;
}

/* Full-width mega panel (Vercel style) */
.mega {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--mega-bg);
  border-bottom: 1px solid var(--mega-border);
  box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease),
    visibility 0.22s, background 0.35s var(--ease);
  max-height: min(70vh, 520px);
  overflow-y: auto;
}

.mega::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    transparent 0%,
    color-mix(in srgb, var(--text) 4%, transparent) 50%,
    transparent 100%
  );
  opacity: 0.8;
}

.site-header.mega-open .mega,
.mega.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.mega-panel {
  display: none;
  position: relative;
  padding: 28px 0 36px;
}

.mega-panel.is-active {
  display: block;
}

.mega-inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px 28px;
  max-width: 1100px;
}

/* 公司概况：垂直三项；对齐方式与产品中心 mega 相同（居中版心内左排，非贴浏览器最左） */
.mega-inner--simple {
  display: block;
  /* 与 .mega-inner 同宽基准；margin 沿用 .container 的 margin-inline: auto */
  max-width: 1100px;
  margin-inline: auto;
  text-align: left;
}

.mega-inner--simple .mega-col {
  width: auto;
  max-width: 280px;
  /* 与产品中心第一列 .mega-col 一致 */
  padding: 4px 12px 4px 0;
  margin: 0;
}

.mega-inner--simple .mega-col:not(:last-child)::after {
  display: none;
}

.mega-inner--simple .mega-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.mega-inner--simple .mega-links a {
  display: block;
  width: auto;
  min-width: 8em;
  font-size: 18px;
  font-weight: 500;
  text-align: left;
  padding: 8px 0;
  border-radius: 0;
}

.mega-inner--simple .mega-links a:hover {
  background: transparent;
  color: var(--blue-300);
}

.mega-col {
  position: relative;
  padding: 4px 12px 4px 0;
}

.mega-col:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  right: 0;
  width: 1px;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(148, 163, 184, 0.14) 20%,
    rgba(96, 165, 250, 0.18) 50%,
    rgba(148, 163, 184, 0.14) 80%,
    transparent
  );
}

.mega-col-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--mega-title);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.mega-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mega-links a {
  display: block;
  padding: 7px 10px 7px 0;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--mega-link);
  border-radius: 8px;
  transition: color 0.18s, background 0.18s;
  line-height: 1.35;
}

.mega-links a:hover {
  color: var(--text);
  background: var(--mega-hover-bg);
}

.mega-links a .mega-desc {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--mega-desc);
  line-height: 1.45;
  transition: color 0.18s;
}

.mega-links a:hover .mega-desc {
  color: var(--blue-400);
}

.mega-links a.external::after {
  content: "↗";
  margin-left: 6px;
  font-size: 13px;
  opacity: 0.45;
}

/* Dim page when mega open */
.mega-backdrop {
  position: fixed;
  inset: 0;
  top: var(--header-h);
  background: var(--backdrop);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s, visibility 0.22s;
  z-index: 99;
}

.mega-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.25s, opacity 0.25s;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 10px;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(180deg, var(--blue-500), var(--blue-600));
  color: #fff;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08) inset,
    0 1px 2px rgba(0, 0, 0, 0.3),
    0 8px 24px -8px rgba(37, 99, 235, 0.65);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.12) inset,
    0 1px 2px rgba(0, 0, 0, 0.3),
    0 12px 32px -8px rgba(37, 99, 235, 0.8);
  filter: brightness(1.06);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  background: rgba(59, 130, 246, 0.08);
  border-color: var(--blue-400);
}

.btn-lg {
  height: 52px;
  padding: 0 28px;
  font-size: 15px;
  border-radius: 12px;
}

/* Hero */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(48px, 8vw, 100px));
  padding-bottom: clamp(64px, 10vw, 120px);
  min-height: 92vh;
  display: flex;
  align-items: center;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 8px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(37, 99, 235, 0.08);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.hero-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 12px var(--cyan-400);
  animation: pulse 2.4s ease infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.85);
  }
}

.hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.12;
  margin-bottom: 24px;
}

.hero h1 .gradient {
  background: var(--hero-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: clamp(16px, 1.35vw, 19px);
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.hero-meta-item strong {
  display: block;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 4px;
}

.hero-meta-item span {
  font-size: 13px;
  color: var(--text-muted);
}

/* Hero visual panel */
.hero-visual {
  position: relative;
}

.hero-panel {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: var(--panel-top), var(--surface);
  box-shadow: var(--shadow-card), var(--glow-blue);
  overflow: hidden;
  padding: 28px;
  min-height: 420px;
}

.hero-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(147, 197, 253, 0.5), transparent);
}

.panel-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
}

.panel-chrome span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.25);
}

.panel-chrome span:nth-child(1) {
  background: #f87171;
}
.panel-chrome span:nth-child(2) {
  background: #fbbf24;
}
.panel-chrome span:nth-child(3) {
  background: #34d399;
}

.panel-title {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 8px;
  letter-spacing: 0.04em;
}

.stack-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stack-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.25s, background 0.25s, transform 0.25s var(--ease);
}

.stack-item:hover {
  border-color: var(--border-strong);
  background: rgba(59, 130, 246, 0.06);
  transform: translateX(4px);
}

.stack-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--blue-500) 22%, transparent),
    color-mix(in srgb, var(--cyan-400) 10%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--blue-400) 30%, transparent);
  color: var(--blue-400);
  flex-shrink: 0;
}

.stack-icon svg {
  width: 20px;
  height: 20px;
  display: block;
}

.stack-item h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}

.stack-item p {
  font-size: 12px;
  color: var(--text-muted);
}

.panel-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #34d399;
}

.status-dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

/* Capability grid */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.cap-card {
  position: relative;
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s var(--ease), background 0.3s;
}

.cap-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.12), transparent 55%);
  opacity: 0;
  transition: opacity 0.3s;
}

.cap-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  background: var(--surface-2);
}

.cap-card:hover::before {
  opacity: 1;
}

.cap-num {
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-400);
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.cap-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  color: var(--blue-400);
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--blue-500) 16%, transparent),
    color-mix(in srgb, var(--cyan-400) 8%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--blue-400) 28%, transparent);
  position: relative;
  z-index: 1;
}

.cap-icon svg {
  width: 22px;
  height: 22px;
  display: block;
}

.cap-card h3 {
  position: relative;
  font-size: 18px;
  font-weight: 650;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.cap-card p {
  position: relative;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Business domains */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.domain-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 24px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--chip-bg);
  transition: all 0.3s var(--ease);
  min-height: 140px;
}

.domain-chip:hover {
  border-color: var(--border-strong);
  box-shadow: var(--glow-blue);
}

.domain-chip .icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(96, 165, 250, 0.2);
  color: var(--blue-300);
  font-size: 15px;
}

.domain-chip h3 {
  font-size: 15px;
  font-weight: 600;
}

.domain-chip p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Product cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.product-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
}

.product-card-media {
  aspect-ratio: 16/10;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.product-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}

.product-card-media.contain img {
  object-fit: contain;
  padding: 16px;
}

.product-card:hover .product-card-media img {
  transform: scale(1.04);
}

.product-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--glow-blue);
}

.product-card-top {
  padding: 24px 24px 0;
}

.product-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cyan-400);
  margin-bottom: 12px;
}

.product-card h3 {
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.product-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  padding: 0 24px 20px;
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--blue-300);
  font-weight: 500;
}

.product-card-footer span {
  transition: transform 0.25s var(--ease);
}

.product-card:hover .product-card-footer span {
  transform: translateX(4px);
}

/* Solutions */
.solution-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.solution-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color 0.3s, background 0.3s;
}

.solution-item:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.solution-index {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-400);
  padding-top: 4px;
}

.solution-item h3 {
  font-size: 17px;
  font-weight: 650;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.solution-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* About split */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.about-copy .section-title {
  margin-bottom: 20px;
}

.about-copy > p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 15px;
}

.mission-box {
  margin-top: 32px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.12), transparent),
    var(--surface-2);
}

.mission-box h4 {
  font-size: 13px;
  color: var(--blue-300);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.mission-box p {
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.pillars {
  display: grid;
  gap: 12px;
}

.pillar {
  padding: 22px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: start;
}

.pillar-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.2);
  color: var(--blue-300);
  font-size: 18px;
}

.pillar h4 {
  font-size: 15px;
  font-weight: 650;
  margin-bottom: 6px;
}

.pillar p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 16px;
}

.news-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s, transform 0.3s var(--ease);
  min-height: 220px;
}

.news-card:first-child {
  background:
    linear-gradient(160deg, rgba(37, 99, 235, 0.15), transparent 60%),
    var(--surface);
}

.news-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.news-date {
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-400);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.news-card h3 {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin-bottom: 12px;
  flex: 1;
}

.news-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* CTA band */
.cta-band {
  position: relative;
  border-radius: calc(var(--radius-lg) + 4px);
  border: 1px solid var(--border-strong);
  background:
    radial-gradient(ellipse 80% 100% at 20% 50%, rgba(37, 99, 235, 0.25), transparent 55%),
    radial-gradient(ellipse 60% 80% at 90% 50%, rgba(6, 182, 212, 0.12), transparent 50%),
    var(--surface-2);
  padding: clamp(48px, 6vw, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(90deg, black, transparent 80%);
  pointer-events: none;
}

.cta-band h2 {
  position: relative;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.cta-band p {
  position: relative;
  color: var(--text-secondary);
  max-width: 480px;
  font-size: 15px;
}

.cta-actions {
  position: relative;
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding-top: 64px;
  padding-bottom: 32px;
  background: var(--bg-elevated);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 320px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 18px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  padding: 6px 0;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--blue-300);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom a:hover {
  color: var(--blue-300);
}

/* Page hero (inner pages) */
.page-hero {
  padding-top: calc(var(--header-h) + 64px);
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-secondary);
  max-width: 600px;
  font-size: 16px;
}

/* Inner page content cards */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* ========== Detail content (scraped pages) ========== */
.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-nav a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.page-nav a:hover {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--surface-2);
}

.detail-block {
  padding-block: clamp(48px, 6vw, 80px);
  border-top: 1px solid var(--border);
}

/* 锚点跳转时避开固定顶栏 */
.detail-block,
.detail-grid[id],
[id^="sw-"],
#sentinel,
#nighthawk,
#camera,
#network,
#soldier,
#handle,
#sentinel-sol,
#invasion,
#iot,
#farming,
#intro,
#team,
#news {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.detail-block:first-of-type {
  border-top: 0;
}

.detail-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.detail-grid.reverse {
  direction: rtl;
}

.detail-grid.reverse > * {
  direction: ltr;
}

.detail-copy h2 {
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.detail-copy .lead {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 18px;
}

.feature-list {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.feature-list li {
  position: relative;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-400);
  box-shadow: 0 0 10px var(--blue-400);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-300);
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--blue-500) 10%, transparent);
  padding: 4px 10px;
  border-radius: 999px;
}

.media-frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

button.media-frame.lb-item {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  cursor: zoom-in;
  text-align: left;
}

.media-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  pointer-events: none;
}

.media-frame.contain img {
  object-fit: contain;
  max-height: 420px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  padding: 16px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.gallery-lg {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

/* 小图装饰（非实拍/占位配图，不放大） */
.gallery-sm {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  max-width: 720px;
}

.gallery-sm figure {
  aspect-ratio: 1;
  min-height: 0;
  cursor: default;
  opacity: 0.88;
}

.gallery-sm img {
  object-fit: cover;
}

@media (max-width: 960px) {
  .gallery-sm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: none;
  }
}

@media (max-width: 480px) {
  .gallery-sm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.gallery a,
.gallery button.lb-item,
.gallery figure {
  margin: 0;
  padding: 0;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--surface);
  aspect-ratio: 4/3;
  cursor: zoom-in;
  display: block;
  width: 100%;
  font: inherit;
  color: inherit;
}

.gallery-lg a,
.gallery-lg button.lb-item {
  aspect-ratio: 16/11;
  min-height: 220px;
}

.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s var(--ease);
  pointer-events: none;
}

.gallery a:hover img,
.gallery button.lb-item:hover img {
  transform: scale(1.04);
}

.gallery.contain figure,
.gallery.contain a,
.gallery.contain button.lb-item {
  aspect-ratio: 1;
}

.gallery.contain img {
  object-fit: contain;
  padding: 10px;
  background: var(--surface-2);
}

/* 三套方案横幅：左-中-右，只展示封面 */
.kit-banner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 8px;
}

.kit-banner--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.kit-banner--1 {
  grid-template-columns: minmax(0, 1fr);
}

.kit-banner--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* 无线宽带三台设备封面 */
.network-device-panel {
  min-width: 0;
}

.network-device-covers {
  gap: 12px;
}

.kit-cover--device {
  min-width: 0;
}

.kit-cover--device .kit-cover-meta {
  padding: 10px 12px;
  text-align: center;
}

.kit-cover--device .kit-cover-meta strong {
  font-size: 14px;
}

.kit-cover--device .kit-cover-meta span {
  display: none;
}

.kit-cover-media--device {
  aspect-ratio: 1;
  background: #fff;
}

.kit-cover-media--device img {
  object-fit: contain;
  object-position: center;
  padding: 10px;
  background: #fff;
}

@media (max-width: 900px) {
  .kit-banner--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: none;
  }
}

/* 典型应用场景：单封面、无底部文案、完整显示不裁切 */
.kit-banner--scene-cover {
  max-width: min(720px, 100%);
}

.kit-cover--bare .kit-cover-meta {
  display: none;
}

.kit-cover--bare .kit-cover-media,
.kit-cover--bare .kit-cover-media--scene {
  aspect-ratio: auto;
  height: auto;
  overflow: visible;
  border-radius: inherit;
}

.kit-cover--bare .kit-cover-media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center top;
  display: block;
}

.kit-cover {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-card);
  cursor: zoom-in;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease);
}

.kit-cover:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -20px rgba(37, 99, 235, 0.35);
}

.kit-cover:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
}

.kit-cover-media {
  position: relative;
  background: var(--surface-2);
  aspect-ratio: 790 / 862;
  overflow: hidden;
}

.kit-cover-media--scene {
  aspect-ratio: 4 / 3;
}

.kit-cover-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  pointer-events: none;
}

.kit-cover-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px 16px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
}

/* 文字说明在图片上方（三种产品形态） */
.kit-cover--meta-top .kit-cover-meta {
  border-top: 0;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  padding: 14px 16px;
  order: -1; /* 兜底：即便 DOM 顺序变化也置顶 */
}

.kit-cover-meta strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.kit-cover-meta span {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.45;
}

@media (max-width: 1100px) {
  .kit-banner--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .kit-banner {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }

  .kit-banner--4 {
    grid-template-columns: 1fr;
    max-width: 420px;
  }

  .kit-banner--1 {
    max-width: 280px;
  }
}

/* 方案长卷灯箱：整套图竖向连续滚动，间隙 0 */
.story-viewer {
  position: fixed;
  inset: 0;
  z-index: 320;
  display: grid;
  grid-template-rows: auto 1fr;
  background: rgba(8, 10, 16, 0.92);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s var(--ease), visibility 0.22s;
}

.story-viewer.is-open {
  opacity: 1;
  visibility: visible;
}

.story-viewer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.88);
  background: rgba(0, 0, 0, 0.35);
}

.story-viewer-bar strong {
  font-size: 14px;
  font-weight: 650;
}

.story-viewer-bar span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  margin-left: 10px;
}

.story-viewer-close {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.story-viewer-close:hover {
  background: rgba(255, 255, 255, 0.12);
}

.story-viewer-scroll {
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.story-viewer-stack {
  width: min(920px, 100%);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0; /* 方案页连缝，无间隙 */
  background: #0a0a0a;
}

.story-viewer-stack img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0;
  padding: 0;
  border: 0;
  vertical-align: top;
  user-select: none;
  -webkit-user-drag: none;
}

body.story-viewer-open {
  overflow: hidden;
}

.story-viewer-slot {
  width: 100%;
  margin: 0;
  padding: 0;
  line-height: 0;
}

.story-viewer-slot img {
  width: 100%;
  height: auto;
  display: block;
}

.collapse-more-btn {
  display: inline-flex;
  margin: 20px auto 0;
  width: fit-content;
}

.timeline .collapse-more-btn {
  display: flex;
}

[data-defer-block] > .collapse-more-btn {
  margin: 12px 0 24px;
}

/* Compact IPR card inside intro */
.ipr-inline {
  margin-top: 28px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.ipr-inline h3 {
  font-size: 14px;
  font-weight: 650;
  margin-bottom: 10px;
  color: var(--text);
}

.ipr-inline .lb-item {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface-2);
  cursor: zoom-in;
}

.ipr-inline img {
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  padding: 8px;
  pointer-events: none;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s var(--ease), visibility 0.22s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-dialog {
  position: relative;
  max-width: min(1200px, 96vw);
  max-height: 90vh;
  outline: none;
}

.lightbox-dialog img {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
  background: #0a0a0a;
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.12);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 22px;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
  user-select: none;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.14);
}

.lightbox-nav:disabled {
  opacity: 0.28;
  cursor: default;
}

.lightbox-prev {
  left: -56px;
}

.lightbox-next {
  right: -56px;
}

.lightbox-counter {
  margin-top: 6px;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}

.lightbox-caption {
  margin-top: 12px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

body.lightbox-open {
  overflow: hidden;
}

@media (max-width: 1100px) {
  .lightbox-prev {
    left: 8px;
  }

  .lightbox-next {
    right: 8px;
  }

  .lightbox-nav {
    width: 38px;
    height: 38px;
    background: rgba(0, 0, 0, 0.55);
  }
}

.timeline-item .thumbs .lb-item {
  padding: 0;
  border: 0;
  background: transparent;
  border-radius: 8px;
  overflow: hidden;
  cursor: zoom-in;
  display: block;
  width: 100%;
}

.timeline-item .thumbs .lb-item img {
  pointer-events: none;
}

@media (max-width: 960px) {
  .gallery-lg {
    grid-template-columns: 1fr;
  }

  .gallery-lg a,
  .gallery-lg button.lb-item {
    min-height: 180px;
  }
}

/* Kit tabs (sentinel online / offline / person) */
.kit-tabs {
  margin-top: 8px;
}

.kit-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.kit-tab {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease),
    color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.kit-tab:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.kit-tab.is-active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-500));
  box-shadow: 0 8px 22px -12px rgba(37, 99, 235, 0.65);
}

.kit-panel[hidden] {
  display: none !important;
}

.kit-panel.is-active {
  animation: kit-fade 0.28s var(--ease);
}

@keyframes kit-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Pricing matrix (cloud rental) */
.price-table-wrap {
  overflow-x: auto;
  margin-top: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.price-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}

.price-table th,
.price-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  text-align: center;
  vertical-align: middle;
}

.price-table thead th {
  background: color-mix(in srgb, var(--surface-2) 90%, transparent);
  color: var(--text);
  font-weight: 650;
}

.price-table tbody th {
  text-align: left;
  font-weight: 600;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
}

.price-table td {
  color: var(--text-secondary);
}

.price-table tbody tr:last-child th,
.price-table tbody tr:last-child td {
  border-bottom: 0;
}

.map-embed {
  position: relative;
  width: 100%;
  min-height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.map-embed iframe {
  display: block;
  width: 100%;
  height: 320px;
  border: 0;
}

.specs {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 14px;
}

.specs th,
.specs td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.specs th {
  width: 36%;
  color: var(--text-muted);
  font-weight: 500;
  background: color-mix(in srgb, var(--surface-2) 80%, transparent);
}

.specs td {
  color: var(--text-secondary);
}

.kpi-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}

.kpi {
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.kpi strong {
  display: block;
  font-size: 15px;
  font-weight: 650;
  margin-bottom: 4px;
  color: var(--text);
}

.kpi span {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.timeline {
  display: grid;
  gap: 20px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
}

.timeline-item .when {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-400);
  letter-spacing: 0.02em;
}

.timeline-item h3 {
  font-size: 16px;
  font-weight: 650;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.timeline-item .thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.timeline-item .thumbs img {
  width: 100%;
  height: 90px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.sub-nav-sticky {
  position: sticky;
  top: var(--header-h);
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.sub-nav-sticky .container {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-block: 10px;
}

.sub-nav-sticky a {
  flex: 0 0 auto;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  border-radius: 8px;
  white-space: nowrap;
}

.sub-nav-sticky a:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--blue-500) 10%, transparent);
}

.note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.6;
}

@media (max-width: 960px) {
  .detail-grid,
  .detail-grid.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .kpi-row {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 1200px) {
  .cap-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .domain-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-grid {
    grid-template-columns: 1fr 1fr;
  }
  .news-card:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 960px) {
  .hero-inner,
  .about-split,
  .solution-list,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    padding: 12px var(--gutter) 24px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    gap: 2px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    z-index: 101;
  }

  .nav.open {
    display: flex;
  }

  .nav-link,
  .nav-trigger {
    width: 100%;
    justify-content: space-between;
    padding: 14px 12px;
    font-size: 15px;
    border-radius: 10px;
  }

  /* Mobile: mega panels accordion under each trigger */
  .mega {
    display: none !important;
  }

  .nav-item > .mega-panel {
    display: none;
    padding: 4px 0 12px 8px;
    background: transparent;
  }

  .nav-item.open > .mega-panel {
    display: block;
  }

  .mega-inner {
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: none;
  }

  .mega-col {
    padding: 0;
  }

  .mega-col:not(:last-child)::after {
    display: none;
  }

  .mega-col-title {
    margin-bottom: 10px;
    font-size: 12px;
  }

  .mega-links a {
    font-size: 15px;
    padding: 10px 8px;
  }

  .mega-links a .mega-desc {
    display: none;
  }

  .mega-backdrop {
    display: none !important;
  }

  .site-header.mega-open {
    background: var(--header-bg-solid);
  }

  .menu-toggle {
    display: flex;
  }

  .header-actions .btn.btn-primary {
    display: none;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }

  .domain-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========== Careers accordion ========== */
.job-list {
  display: grid;
  gap: 12px;
}

.job-item {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.job-item.is-open {
  border-color: var(--border-strong);
  box-shadow: var(--glow-blue);
}

.job-toggle {
  width: 100%;
  display: grid;
  grid-template-columns: 48px 1fr 24px;
  gap: 12px;
  align-items: center;
  padding: 20px 22px;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  transition: background 0.2s;
}

.job-toggle:hover {
  background: color-mix(in srgb, var(--blue-500) 6%, transparent);
}

.job-index {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-400);
}

.job-title {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.job-chevron {
  width: 10px;
  height: 10px;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease);
  justify-self: end;
  margin-bottom: 4px;
}

.job-item.is-open .job-chevron {
  transform: rotate(-135deg);
  margin-bottom: 0;
  margin-top: 4px;
  border-color: var(--blue-400);
}

.job-panel {
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
}

.job-panel-inner {
  padding: 8px 22px 24px 82px;
}

.job-panel-inner h4 {
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.04em;
  color: var(--blue-300);
  margin: 16px 0 10px;
}

.job-panel-inner ul {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
}

.job-panel-inner li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.job-panel-inner li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue-400);
  opacity: 0.7;
}

@media (max-width: 640px) {
  .job-toggle {
    grid-template-columns: 36px 1fr 20px;
    padding: 16px;
  }

  .job-panel-inner {
    padding: 4px 16px 20px 16px;
  }

  .job-title {
    font-size: 15px;
  }
}

/* ========== Back to top ========== */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 201;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--theme-switcher-border);
  background: var(--theme-switcher-bg);
  backdrop-filter: blur(16px) saturate(1.2);
  color: var(--text);
  box-shadow: 0 10px 28px -12px rgba(0, 0, 0, 0.45);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s var(--ease), visibility 0.25s, transform 0.25s var(--ease),
    border-color 0.2s, background 0.2s;
  cursor: pointer;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--border-strong);
  color: var(--blue-300);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  display: block;
}

/* ========== Theme menu (header, next to 商务咨询) ========== */
.theme-menu {
  position: relative;
  z-index: 5;
}

.theme-menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  cursor: pointer;
}

.theme-menu-btn:hover,
.theme-menu.is-open .theme-menu-btn {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--surface);
}

.theme-menu-swatch {
  width: 16px;
  height: 16px;
  border-radius: 5px;
  border: 1px solid var(--border);
  flex-shrink: 0;
  background: linear-gradient(135deg, #f4f7fb 35%, #2563eb 100%);
}

.theme-menu-swatch[data-theme="midnight"] {
  background: linear-gradient(135deg, #030712 40%, #2563eb 100%);
}

.theme-menu-swatch[data-theme="daybreak"] {
  background: linear-gradient(135deg, #f4f7fb 35%, #2563eb 100%);
}

.theme-menu-swatch[data-theme="signal"] {
  background: linear-gradient(135deg, #000 40%, #06b6d4 100%);
}

.theme-menu-caret {
  width: 12px;
  height: 12px;
  opacity: 0.55;
  transition: transform 0.2s var(--ease);
}

.theme-menu.is-open .theme-menu-caret {
  transform: rotate(180deg);
  opacity: 0.9;
}

.theme-menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  padding: 8px;
  border-radius: 14px;
  border: 1px solid var(--theme-switcher-border);
  background: var(--theme-switcher-bg);
  backdrop-filter: blur(16px) saturate(1.2);
  box-shadow: 0 16px 40px -16px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.theme-menu-panel[hidden] {
  display: none !important;
}

.theme-option {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: center;
  padding: 10px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  text-align: left;
  transition: border-color 0.2s, background 0.2s;
  color: var(--text-secondary);
  cursor: pointer;
  width: 100%;
  background: transparent;
}

.theme-option:hover {
  background: color-mix(in srgb, var(--blue-500) 8%, transparent);
  color: var(--text);
}

.theme-option.active {
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--blue-500) 12%, transparent);
  color: var(--text);
}

.theme-swatch {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.theme-swatch::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--swatch);
}

.theme-option[data-theme="midnight"] .theme-swatch {
  --swatch: linear-gradient(135deg, #030712 40%, #2563eb 100%);
}

.theme-option[data-theme="daybreak"] .theme-swatch {
  --swatch: linear-gradient(135deg, #f4f7fb 35%, #2563eb 100%);
  border-color: rgba(15, 23, 42, 0.12);
}

.theme-option[data-theme="signal"] .theme-swatch {
  --swatch: linear-gradient(135deg, #000 40%, #06b6d4 100%);
}

.theme-option-meta strong {
  display: block;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.theme-option-meta span {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

@media (max-width: 960px) {
  .theme-menu-label {
    display: none;
  }

  .theme-menu-btn {
    width: 40px;
    padding: 0;
    justify-content: center;
    gap: 0;
  }

  .theme-menu-caret {
    display: none;
  }
}

@media (max-width: 640px) {
  .back-to-top {
    right: 12px;
    bottom: 12px;
    width: 40px;
    height: 40px;
  }

  .cap-grid,
  .product-grid,
  .domain-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    gap: 20px;
  }

  .logo-text {
    font-size: 14px;
  }
}