/* ============================================================
   style-v2.css — QAIDAO 设计系统 v3（布局与视觉升级）
   ============================================================ */
:root {
  --bg-main: #FFFFFF;
  --bg-sub: #F3F8FC;
  --bg-card: #FFFFFF;
  --blue-primary: #0284C7;
  --blue-dark: #0369A1;
  --blue-light: #E0F2FE;
  --ink: #0F172A;
  --text-muted: #475569;
  --text-light: #64748B;
  --line: #E2E8F0;
  --white: #FFFFFF;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --max: 1180px;

  /* 升级：渐变、阴影与圆角 */
  --gradient-blue: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #0284c7 45%, #38bdf8 100%);
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 12px 32px rgba(2, 132, 199, 0.10);
  --shadow-lg: 0 24px 52px rgba(2, 132, 199, 0.14);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* ---------- 基础 ---------- */
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  overflow-x: hidden;
  background: #F4F9FD;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

/* 全局氛围光斑（柔和渐变背景） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(620px 420px at 86% -4%, rgba(56, 189, 248, 0.10), transparent 70%),
    radial-gradient(720px 520px at 6% 102%, rgba(139, 92, 246, 0.08), transparent 70%),
    linear-gradient(135deg, #F4F9FD 0%, #E1F0FA 100%);
}

::selection { background: rgba(2, 132, 199, 0.18); color: #0f172a; }
:focus-visible { outline: 2px solid rgba(2, 132, 199, 0.55); outline-offset: 3px; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb { background: rgba(2, 132, 199, 0.22); border-radius: 8px; }
::-webkit-scrollbar-track { background: transparent; }

main {
  flex: 1;
  display: flex;
  flex-direction: column;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
p { margin: 0; }
button { font-family: inherit; cursor: pointer; }

/* 全局分子移动背景 */
#moleculeCanvas {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
}

/* ---------- 滚动显现系统 ---------- */
/* 渐进增强：无 JS 时内容可见；JS 启用后由滚动观察器触发动画 */
.reveal { opacity: 1; transform: none; }
html.js .reveal { opacity: 0; transform: translateY(24px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
html.js .reveal.active { opacity: 1; transform: translateY(0); }
.stagger-1 { transition-delay: 0.08s; }
.stagger-2 { transition-delay: 0.16s; }
.stagger-3 { transition-delay: 0.24s; }
.stagger-4 { transition-delay: 0.32s; }
.stagger-5 { transition-delay: 0.40s; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 32px; }
section { scroll-margin-top: 84px; }

/* ---------- 工具类 ---------- */
.main-pad { padding-top: 96px; min-height: calc(100vh - 96px); }
.icon-14 { width: 14px; height: 14px; }
.icon-16 { width: 16px; height: 16px; }
.icon-20 { width: 20px; height: 20px; }
.icon-24 { width: 24px; height: 24px; }
.icon-26 { width: 26px; height: 26px; }
.btn__icon { width: 16px; height: 16px; margin-right: 4px; }
.btn--sm { padding: 8px 18px; font-size: 13px; border-radius: 999px; }
.section-head--center { margin: 0 auto; text-align: center; }
.section-head--center-lg { margin: 0 auto 64px; text-align: center; }
.section-head--flush { margin-bottom: 0; }
.eyebrow--center { justify-content: center; }
.card__label--blue { color: var(--blue-primary); }
.card__label--violet { color: #7c3aed; }
.jb-developed svg.lucide { color: #38bdf8; }

/* ---------- 通用组件 ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px;
  background: var(--gradient-blue);
  display: inline-block;
}

.text-gradient {
  background: linear-gradient(90deg, var(--blue-primary), #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: gradientFlow 4s linear infinite;
}
@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--gradient-blue);
  color: var(--white);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.28);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(2, 132, 199, 0.38);
  filter: brightness(1.05);
}
.btn--primary:active { transform: translateY(0); }
.btn--ghost {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-color: var(--line);
  color: var(--text-muted);
}
.btn--ghost:hover {
  border-color: rgba(2, 132, 199, 0.4);
  color: var(--blue-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* ---------- NAV 导航栏 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav.scrolled {
  background: rgba(244, 249, 253, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(2, 132, 199, 0.12);
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.08);
}
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; }
.brand img { height: 44px; width: auto; object-fit: contain; transition: transform 0.3s ease; }
.brand:hover img { transform: scale(1.05); }
.nav__links { display: flex; align-items: center; gap: 34px; }
.nav__links a {
  position: relative;
  font-size: 14px;
  color: var(--text-muted);
  padding: 6px 2px;
  font-weight: 500;
  transition: color 0.25s ease;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -4px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-blue);
  transition: right 0.3s ease;
}
.nav__links a:hover { color: var(--blue-primary); }
.nav__links a:hover::after,
.nav__links a[aria-current="page"]::after { right: 0; }
.nav__links a[aria-current="page"] { color: var(--blue-primary); font-weight: 600; }

.nav__toggle {
  display: none;
  width: 32px; height: 32px;
  border: none;
  background: transparent;
  position: relative;
}
.nav__toggle span {
  position: absolute;
  left: 6px; right: 6px;
  height: 1.5px;
  background: var(--ink);
}
.nav__toggle span:nth-child(1) { top: 11px; }
.nav__toggle span:nth-child(2) { top: 19px; }

/* ---------- 页面模块（统一透出底层背景） ---------- */
.products, .team, .news-timeline, .join, .empty-section {
  background: transparent;
  border-top: none;
}

/* ---------- HERO 首页头部 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 88px 0 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.13) 0%, transparent 52%),
    linear-gradient(180deg, #ffffff 0%, #F4F9FD 100%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  width: 540px; height: 540px;
  border-radius: 50%;
  top: -150px; right: -110px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.16), transparent 65%);
  filter: blur(44px);
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  bottom: -190px; left: -130px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 65%);
  filter: blur(52px);
  z-index: 0;
}
.hero__grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(2, 132, 199, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 40%, transparent 100%);
}
.hero__canvas-wrap {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.8;
}
#interference { width: 100%; height: 100%; display: block; }
.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 72px;
  align-items: center;
  width: 100%;
}
.hero-text { min-width: 0; }
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue-primary);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 7px 16px;
  background: rgba(224, 242, 254, 0.7);
  border: 1px solid rgba(2, 132, 199, 0.16);
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(48px, 6.5vw, 84px);
  line-height: 1.06;
  margin-bottom: 26px;
  letter-spacing: -0.015em;
}
.hero h1 .text-gradient {
  background: linear-gradient(90deg, var(--blue-primary), #0284c7, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: gradientFlow 4s linear infinite;
}
.hero__sub {
  font-size: 16.5px;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.85;
}
.hero__ctas { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-media {
  position: relative;
  display: block;
  border-radius: 24px;
  overflow: hidden;
  background: var(--ink);
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(2, 132, 199, 0.15);
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.14);
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}
.hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.5), transparent 40%, transparent 60%, rgba(139, 92, 246, 0.35));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
}
.hero-media:hover {
  transform: translateY(-8px);
  box-shadow: 0 40px 80px rgba(2, 132, 199, 0.18);
}
.hero-media video { width: 100%; height: 100%; object-fit: cover; }
.hero-media-badge {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 3;
  background: rgba(11, 30, 43, 0.72);
  color: #fff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 5px 12px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  font-weight: 600;
}

/* 向下箭头 */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--blue-primary);
  letter-spacing: 0.15em;
  z-index: 10;
  animation: bounce 2s infinite;
  transition: opacity 0.3s;
}
.scroll-indicator:hover { opacity: 0.7; }
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
  40% { transform: translateY(-10px) translateX(-50%); }
  60% { transform: translateY(-5px) translateX(-50%); }
}

/* ---------- 子页面统一页头 ---------- */
.page-hero {
  position: relative;
  padding: 64px 0 60px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(224, 242, 254, 0.75), rgba(255, 255, 255, 0));
  border-bottom: 1px solid rgba(2, 132, 199, 0.08);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(2, 132, 199, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 100% at 50% 0%, black 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 100% at 50% 0%, black 30%, transparent 78%);
  pointer-events: none;
}
.page-hero .container { position: relative; }
.page-hero__eyebrow { justify-content: center; margin-bottom: 18px; }
.page-hero h1 { font-size: clamp(34px, 4.6vw, 52px); line-height: 1.15; }
.page-hero p {
  margin: 16px auto 0;
  max-width: 640px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
}
.page-hero--compact { padding: 38px 0 28px; }
.page-hero--compact p { margin-top: 10px; font-size: 14.5px; max-width: 560px; }

/* ---------- STATS 统计条 ---------- */
.stats-banner {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 44px 0;
  position: relative;
  z-index: 10;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stats__grid > div {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(2, 132, 199, 0.1);
  border-radius: var(--radius-lg);
  padding: 28px 16px 24px;
  transition: all 0.35s ease;
}
.stats__grid > div:hover {
  transform: translateY(-4px);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: var(--shadow-md);
}
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.6vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ---------- 通用小节标题 ---------- */
.section-head h2 { font-size: clamp(28px, 4vw, 38px); margin-bottom: 14px; }
.section-head p { color: var(--text-muted); font-size: 15px; line-height: 1.7; max-width: 560px; }
.section-head--center p { margin-left: auto; margin-right: auto; }

/* ---------- PRODUCTS 核心产品 ---------- */
.products { padding: clamp(80px, 10vw, 120px) 0; }
.products-toolbar { display: flex; justify-content: center; margin-bottom: 56px; }
.filter-group {
  display: inline-flex;
  gap: 4px;
  background: rgba(255, 255, 255, 0.85);
  padding: 5px;
  border-radius: 999px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.filter-btn {
  background: transparent;
  border: none;
  padding: 7px 22px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 999px;
  transition: all 0.25s ease;
}
.filter-btn:hover { color: var(--ink); }
.filter-btn.active {
  background: var(--gradient-blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
  font-weight: 600;
}
.products__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s ease;
}
.card:hover {
  transform: translateY(-8px);
  border-color: rgba(2, 132, 199, 0.28);
  box-shadow: var(--shadow-lg);
}
.card__img-wrap {
  height: 210px;
  background: var(--bg-sub);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--line);
}
.card__img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.card:hover .card__img-wrap img { transform: scale(1.06); }
.card__terminal {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue-primary);
  background: #0f172a;
  width: 100%; height: 100%;
  padding: 26px;
  line-height: 1.9;
}
.cmd-line { display: block; opacity: 0.9; }
.cursor::after { content: '█'; animation: blink 0.9s step-end infinite; margin-left: 2px; }
@keyframes blink { 50% { opacity: 0; } }
.card__content { padding: 26px 24px 30px; }
.card__label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--blue-primary);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  text-transform: uppercase;
  font-weight: 600;
}
.card__title { font-size: 19px; margin-bottom: 10px; }
.card__desc { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; }

/* ---------- EMPTY STATE 云平台占位 ---------- */
.empty-section { padding: 72px 0 110px; text-align: center; }
.empty-state-box {
  margin: 40px auto 0;
  max-width: 560px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px dashed rgba(2, 132, 199, 0.35);
  border-radius: var(--radius-xl);
  padding: 56px 40px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  transition: all 0.35s ease;
}
.empty-state-box:hover {
  border-color: var(--blue-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.status-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: #0369a1;
  background: rgba(224, 242, 254, 0.9);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
}
.icon-glow {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.9), rgba(56, 189, 248, 0.18));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-primary);
  box-shadow: 0 10px 24px rgba(2, 132, 199, 0.18);
}
.empty-text {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-light);
  letter-spacing: 0.1em;
}

/* ---------- TEAM 核心团队 ---------- */
.team { padding: clamp(80px, 10vw, 120px) 0; }
.team__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-item {
  position: relative;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 38px 22px 32px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s ease;
  overflow: hidden;
}
.team-item::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-blue);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.team-item:hover {
  transform: translateY(-8px);
  border-color: rgba(2, 132, 199, 0.28);
  box-shadow: var(--shadow-lg);
}
.team-item:hover::before { opacity: 1; }
.team-avatar {
  width: 116px; height: 116px;
  margin: 0 auto 22px;
  border-radius: 50%;
  padding: 4px;
  background: var(--gradient-blue);
  box-shadow: 0 10px 24px rgba(2, 132, 199, 0.22);
}
.team-avatar img {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #fff;
  transition: transform 0.5s ease;
}
.team-item:hover .team-avatar img { transform: scale(1.08); }
.team-info { margin-bottom: 14px; }
.team-name { font-size: 18px; font-weight: 600; margin-bottom: 4px; }
.team-role {
  font-size: 12px;
  color: var(--blue-primary);
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.team-desc { font-size: 13px; color: var(--text-muted); line-height: 1.65; }

/* ---------- NEWS 时间轴 ---------- */
.news-timeline { padding: clamp(72px, 9vw, 110px) 0 clamp(80px, 10vw, 120px); position: relative; }
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background: linear-gradient(to bottom, transparent, rgba(2, 132, 199, 0.22), rgba(2, 132, 199, 0.22), transparent);
  top: 0; bottom: 0; left: 50%;
  transform: translateX(-50%);
}
.timeline-item { padding: 16px 40px; position: relative; width: 50%; margin-bottom: 24px; }
.timeline-item:nth-child(odd) { left: 0; }
.timeline-item:nth-child(even) { left: 50%; }
.timeline-dot {
  position: absolute;
  width: 16px; height: 16px;
  background: var(--gradient-blue);
  border: 3px solid #fff;
  border-radius: 50%;
  top: 45px;
  z-index: 2;
  box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.12), 0 4px 10px rgba(2, 132, 199, 0.25);
  transition: all 0.4s ease;
}
.timeline-item:nth-child(odd) .timeline-dot { right: -8px; }
.timeline-item:nth-child(even) .timeline-dot { left: -8px; }
.timeline-item:hover .timeline-dot {
  background: var(--white);
  border-color: var(--blue-primary);
  box-shadow: 0 0 16px rgba(2, 132, 199, 0.45);
  transform: scale(1.25);
}
.timeline-content {
  position: relative;
  padding: 28px 30px;
  background: linear-gradient(145deg, #ffffff, #f8fbff);
  border: 1px solid rgba(2, 132, 199, 0.12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s ease;
}

.timeline-content:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(2, 132, 199, 0.25);
}
.timeline-date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(224, 242, 254, 0.85);
  border: 1px solid rgba(2, 132, 199, 0.18);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #0369a1;
  font-weight: 600;
  margin-bottom: 14px;
}
.timeline-date::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-primary);
}
.timeline-title { font-size: 17px; margin-bottom: 8px; }
.timeline-image-wrap {
  margin-top: 16px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(2, 132, 199, 0.1);
}
.timeline-image-wrap img {
  width: 100%; height: auto;
  display: block;
  transition: transform 0.55s ease;
}
.timeline-content:hover .timeline-image-wrap img { transform: scale(1.05); }

/* ---------- JOIN 加入我们 ---------- */
.join { padding: clamp(36px, 4vw, 56px) 0 clamp(70px, 8vw, 110px); }
.join-container {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
  max-width: var(--max);
  margin: 0 auto;
}

/* 左：招聘海报（限高，保证电脑窗口一屏可见） */
.join-poster-col { min-width: 0; }
.join-poster-wrap {
  position: relative;
  width: auto;
  max-width: 100%;
  margin-inline: auto;
  aspect-ratio: 2481 / 4045;
  height: clamp(300px, calc(100vh - 400px), 820px);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(2, 132, 199, 0.16);
  box-shadow: var(--shadow-lg);
  background: var(--blue-light);
  cursor: zoom-in;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.45s ease, border-color 0.3s ease;
}
.join-poster-wrap:hover {
  transform: translateY(-4px);
  border-color: rgba(2, 132, 199, 0.34);
  box-shadow: 0 30px 64px rgba(2, 132, 199, 0.18);
}
.join-poster-img {
  width: 100%; height: 100%;
  object-fit: contain;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.join-poster-wrap:hover .join-poster-img { transform: scale(1.015); }
.join-poster-zoom {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 2;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(2, 132, 199, 0.2);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-primary);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.join-poster-zoom:hover { background: var(--gradient-blue); color: #fff; transform: scale(1.1) rotate(6deg); }
.join-poster-zoom svg { width: 18px; height: 18px; }
.join-poster-caption {
  display: flex; align-items: center; justify-content: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-light);
  letter-spacing: 0.04em;
}
.join-poster-caption svg { width: 14px; height: 14px; color: var(--blue-primary); }

/* 右：热招岗位 */
.join-jobs { min-width: 0; }
.join-jobs__head { margin-bottom: 26px; }
.join-jobs__head h2 { font-size: clamp(24px, 2.8vw, 30px); margin-bottom: 8px; }
.join-jobs__head p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.join-jobs__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.job-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  text-align: left;
  padding: 20px 20px 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}
.job-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.job-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2, 132, 199, 0.28);
  box-shadow: var(--shadow-md);
}
.job-card:hover::before { transform: scaleX(1); }
.job-card.active {
  border-color: rgba(2, 132, 199, 0.45);
  background: linear-gradient(165deg, #ffffff 0%, #F0F8FE 100%);
  box-shadow: var(--shadow-md);
}
.job-card.active::before { transform: scaleX(1); }
.job-card__chevron {
  position: absolute;
  top: 16px; right: 16px;
  color: var(--blue-primary);
  opacity: 0.4;
  transition: transform 0.35s ease, opacity 0.25s ease;
}
.job-card__chevron svg { width: 18px; height: 18px; }
.job-card.active .job-card__chevron { transform: rotate(180deg); opacity: 1; }
.job-card__icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.95), rgba(56, 189, 248, 0.18));
  border: 1px solid rgba(2, 132, 199, 0.16);
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-primary);
  transition: all 0.35s ease;
}
.job-card__icon svg { width: 20px; height: 20px; }
.job-card.active .job-card__icon {
  background: var(--gradient-blue);
  color: #fff;
  box-shadow: 0 6px 14px rgba(2, 132, 199, 0.32);
  transform: translateY(-1px);
}
.job-card__name {
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}
.job-card__desc { font-size: 12px; color: var(--text-light); line-height: 1.55; }
.job-card__tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; }
.job-card__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: #0369a1;
  background: rgba(224, 242, 254, 0.85);
  border: 1px solid rgba(2, 132, 199, 0.16);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

/* 岗位详情（展开面板） */
.job-detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.55s cubic-bezier(0.16, 1, 0.3, 1), margin-top 0.4s ease, opacity 0.3s ease;
  margin-top: 0;
  opacity: 0.5;
}
.job-detail.open {
  grid-template-rows: 1fr;
  margin-top: 22px;
  opacity: 1;
}
.job-detail__inner { overflow: hidden; min-height: 0; }
.job-panel {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(2, 132, 199, 0.14);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(22px, 3vw, 30px);
}
.job-panel[hidden] { display: none; }
.job-panel--show { animation: jobPanelIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) both; }
@keyframes jobPanelIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.job-panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.job-panel__head-main { min-width: 0; }
.job-panel__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-primary);
  font-weight: 700;
  margin-bottom: 4px;
}
.job-panel__title { font-size: clamp(18px, 2.2vw, 22px); }
.job-panel__badge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #0369a1;
  background: rgba(224, 242, 254, 0.9);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 5px 14px;
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
}
.job-panel__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
}
.job-block__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--blue-primary);
  margin-bottom: 10px;
}
.job-block__title::before {
  content: "";
  width: 14px; height: 2px;
  background: var(--gradient-blue);
  border-radius: 2px;
}
.job-block__list { display: flex; flex-direction: column; gap: 7px; }
.job-block__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.68;
}
.job-block__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(2, 132, 199, 0.45);
}
.job-block p { font-size: 13.5px; color: var(--text-muted); line-height: 1.8; }
.job-panel__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}
.job-fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: linear-gradient(145deg, rgba(224, 242, 254, 0.8), rgba(255, 255, 255, 0.65));
  border: 1px solid rgba(2, 132, 199, 0.14);
  border-radius: var(--radius-md);
  padding: 14px 18px;
}
.job-fact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-primary);
  font-weight: 700;
}
.job-fact__value { font-size: 14px; font-weight: 600; color: var(--ink); line-height: 1.55; }

/* 招聘海报放大弹窗 */
.poster-modal {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.32s ease, visibility 0.32s;
}
.poster-modal.open { opacity: 1; visibility: visible; }
.poster-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 14, 28, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: zoom-out;
}
.poster-modal__body {
  position: relative;
  z-index: 1;
  display: flex;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  box-shadow: 0 40px 100px rgba(2, 132, 199, 0.28);
  transform: scale(0.92);
  transition: transform 0.38s cubic-bezier(0.16, 1, 0.3, 1);
}
.poster-modal.open .poster-modal__body { transform: scale(1); }
.poster-modal__body img {
  display: block;
  max-width: min(86vw, 880px);
  max-height: 84vh;
  width: auto;
  height: auto;
  object-fit: contain;
}
.poster-modal__close {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 2;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(15, 23, 42, 0.62);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: all 0.3s ease;
}
.poster-modal__close svg { width: 18px; height: 18px; }
.poster-modal__close:hover { background: var(--gradient-blue); transform: rotate(90deg); }
body.modal-open { overflow: hidden; }

.join-links { display: flex; justify-content: center; gap: 36px; margin-top: 30px; flex-wrap: wrap; }
.join-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-width: 170px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
}
.join-btn:hover {
  border-color: rgba(2, 132, 199, 0.35);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}
.join-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.9), #ffffff);
  border: 1px solid rgba(2, 132, 199, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-primary);
  transition: all 0.3s ease;
}
.join-btn:hover .join-icon-wrap { box-shadow: 0 8px 18px rgba(2, 132, 199, 0.2); }
.join-label {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.5;
  transition: color 0.25s ease;
}
.join-btn:hover .join-label { color: var(--blue-primary); }

/* ---------- ABOUT 关于我们 ---------- */
.about { padding: clamp(64px, 9vw, 100px) 0 clamp(90px, 11vw, 130px); }
.about-content { text-align: center; max-width: 800px; margin: 0 auto; }
.about-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.9), rgba(56, 189, 248, 0.16));
  border: 1px solid rgba(2, 132, 199, 0.22);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 36px;
  color: var(--blue-primary);
  box-shadow: var(--shadow-sm);
}
.about__quote {
  font-family: var(--font-body);
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.8;
  color: #1e293b;
  margin-bottom: 44px;
  font-weight: 300;
}
.about__quote span {
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
}
.about-divider {
  width: 72px; height: 3px;
  border-radius: 3px;
  background: var(--gradient-blue);
  margin: 0 auto;
  opacity: 0.8;
}

/* ---------- FOOTER 页脚 ---------- */
.jb-footer {
  background: linear-gradient(180deg, #0d2231, #0B1E2B);
  color: var(--white);
  padding: 64px 0 32px;
  position: relative;
  z-index: 10;
}
.jb-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.5), transparent);
}
.jb-footer__inner { display: flex; flex-direction: column; }
.jb-footer__grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.jb-footer__logo { height: 36px; width: auto; filter: brightness(0) invert(1); }
.jb-footer__brand-block { display: flex; flex-direction: column; }
.jb-footer__tagline {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 13.5px;
  line-height: 1.8;
  max-width: 300px;
}
.jb-footer__col { display: flex; flex-direction: column; gap: 12px; }
.jb-footer__col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 4px;
}
.jb-footer__col a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13.5px;
  width: fit-content;
  transition: color 0.25s ease, transform 0.25s ease;
}
.jb-footer__col a:hover { color: #fff; transform: translateX(3px); }
.jb-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.4);
  padding-top: 28px;
}
.jb-developed { display: flex; align-items: center; gap: 6px; }
.jb-copyright { font-size: 12.5px; color: rgba(255, 255, 255, 0.4); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .jb-footer__grid { grid-template-columns: 1.6fr 1fr 1fr; }
  .join-container { grid-template-columns: 1fr; gap: 36px; }
  .join-poster-wrap { height: clamp(300px, calc(100vh - 360px), 680px); max-width: 520px; margin: 0 auto; }
}

@media (max-width: 920px) {
  .nav__links, .nav .btn { display: none; }
  .nav__toggle { display: block; }
  .nav.open .nav__links {
    display: flex;
    position: absolute;
    top: calc(100% + 8px);
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px;
    background: rgba(244, 249, 253, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(2, 132, 199, 0.12);
    border-radius: 14px;
    box-shadow: 0 12px 32px rgba(2, 132, 199, 0.12);
  }
  .nav__links a { padding: 10px 12px; border-radius: 10px; }
  .nav__links a:hover { background: rgba(2, 132, 199, 0.08); color: var(--blue-primary); }
  .nav__toggle span { transition: transform 0.25s ease; }
  .nav.open .nav__toggle span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
  .nav.open .nav__toggle span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }

  .hero__inner { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero__sub, .hero__ctas { margin-left: auto; margin-right: auto; }
  .hero__ctas { justify-content: center; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); row-gap: 16px; }
  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .team__grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

@media (max-width: 768px) {
  .jb-footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .jb-footer__bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
  .products__grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
}

@media (max-width: 600px) {
  .container { padding: 0 24px; }
  .hero { padding: 120px 0 64px; min-height: auto; }
  .hero h1 { font-size: 40px; }
  .hero-media { border-radius: 18px; }
  .page-hero { padding: 48px 0 44px; }
  .page-hero h1 { font-size: 34px; }
  .join-poster-wrap { height: clamp(300px, calc(100vh - 320px), 520px); }
  .join-jobs__grid { grid-template-columns: 1fr; }
  .job-panel__grid { grid-template-columns: 1fr; }
  .job-panel__facts { grid-template-columns: 1fr; }
  .poster-modal__body img { max-width: 92vw; max-height: 80vh; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .timeline::after { left: 24px; }
  .timeline-item { width: 100%; padding-left: 64px; padding-right: 0; }
  .timeline-item:nth-child(even) { left: 0; }
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot { left: 17px; right: auto; }
  .team__grid { grid-template-columns: 1fr; max-width: 340px; margin: 0 auto; }
  .join-links { flex-direction: column; gap: 20px; align-items: center; }
  .jb-footer__grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none; opacity: 1; transform: none; }
  .job-detail, .job-card, .poster-modal, .poster-modal__body { transition: none; }
  .job-panel--show { animation: none; }
}