/* ============================================================
   点击创客 · GEO — Design System & Shared Styles
   Colors: #F5F5F0 bg · #2E2E2E text · #4A6FA5 accent · #8C8C8C muted
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Roboto:wght@300;400;500;700&display=swap');

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans SC', 'Roboto', -apple-system, sans-serif;
  background: #F5F5F0;
  color: #2E2E2E;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --bg:       #F5F5F0;
  --bg-card:  #FFFFFF;
  --text:     #2E2E2E;
  --accent:   #4A6FA5;
  --accent-dk:#3A5C8F;
  --muted:    #8C8C8C;
  --border:   #E0DDD8;
  --dark:     #1C1C1C;
  --dark2:    #252525;
  --radius:   6px;
  --shadow:   0 1px 4px rgba(0,0,0,.08);
  --shadow-md:0 4px 16px rgba(0,0,0,.10);
  --max-w:    1200px;
  --section-py: 96px;
}

/* ── Typography ─────────────────────────────────────────── */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
h4 { font-size: 1rem; font-weight: 500; }
p  { color: #4A4A4A; }
.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.font-roboto { font-family: 'Roboto', sans-serif; }

/* ── Layout ─────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-py) 0; }
.section--dark { background: var(--dark); color: #E8E8E2; }
.section--dark p { color: #B0AFA8; }
.section--gray { background: #EEEDE8; }

.grid-2  { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.grid-3  { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4  { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex    { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8   { gap: 8px; }
.gap-16  { gap: 16px; }
.gap-24  { gap: 24px; }

/* ── Navigation ─────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  background: rgba(245, 245, 240, .95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .2s;
}
.nav.scrolled { box-shadow: var(--shadow-md); }
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px; height: 64px;
}
.nav__logo {
  font-size: 1.25rem; font-weight: 700; letter-spacing: .02em;
  color: var(--text);
}
/* 产品线名 GEO */
.nav__logo span {
  color: var(--accent); font-weight: 600; font-size: .95rem;
  letter-spacing: .08em; margin-left: 8px;
}
.nav__links { display: flex; gap: 8px; align-items: center; }
/* 顶栏 hover / active 背景与交互落在 li 上 */
.nav__links > li:not(:last-child) {
  border-radius: var(--radius);
  transition: background .15s ease;
}
.nav__links > li:not(:last-child):hover,
.nav__links > li:not(:last-child).active {
  background: rgba(74,111,165,.1);
}
.nav__links a {
  font-size: .875rem; font-weight: 400; color: var(--text);
  padding: 6px 12px;
  border-radius: var(--radius);
  display: inline-block;
  transition: color .15s ease;
}
.nav__links > li:not(:last-child):hover > a,
.nav__links > li:not(:last-child).active > a {
  color: var(--accent);
}
.nav__cta {
  background: var(--accent); color: #fff !important;
  padding: 8px 18px !important; border-radius: var(--radius);
  font-weight: 500 !important;
}
.nav__links > li:last-child:hover .nav__cta {
  background: var(--accent-dk) !important;
}
/* 当前页为「联系与合作」时，active 在 li 上 */
.nav__links > li:last-child.active .nav__cta {
  box-shadow: 0 0 0 2px rgba(255,255,255,.55);
}
.nav__cta:hover { background: var(--accent-dk) !important; }
.nav__toggle { display: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .2s; }

/* ── Nav dropdown (新闻与洞察) ───────────────────────────── */
.nav__item--dropdown {
  position: relative;
}
.nav__trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.nav__caret {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  opacity: .65;
  transition: transform .2s ease;
}
/* 桌面：展开由 li:hover / focus-within 控制 */
.nav__links > li.nav__item--dropdown:hover .nav__caret,
.nav__links > li.nav__item--dropdown:focus-within .nav__caret {
  transform: rotate(180deg);
}
.nav__dropdown {
  position: absolute;
  left: 0;
  top: 100%;
  padding-top: 8px;
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  pointer-events: none;
  z-index: 200;
}
.nav__links > li.nav__item--dropdown:hover .nav__dropdown,
.nav__links > li.nav__item--dropdown:focus-within .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
.nav__dropdown-inner {
  list-style: none;
  margin: 0;
  padding: 6px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.nav__dropdown-inner li {
  transition: background .15s ease;
}
.nav__dropdown-inner li + li {
  border-top: 1px solid rgba(224,221,216,.6);
}
.nav__dropdown-inner li:hover {
  background: rgba(74,111,165,.08);
}
.nav__dropdown-inner li:hover > a {
  color: var(--accent);
}
.nav__dropdown-inner a {
  display: block;
  padding: 10px 18px;
  font-size: .8125rem;
  font-weight: 400;
  white-space: nowrap;
  border-radius: 0;
  transition: color .15s ease;
}

/* 移动端：子菜单默认收起，由 .is-open 控制（样式见下方 media query） */

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius);
  font-size: .9rem; font-weight: 500; cursor: pointer;
  border: none; transition: all .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dk); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(74,111,165,.3); }
.btn-outline { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; }
.btn-ghost { background: rgba(255,255,255,.1); color: #fff; border: 1.5px solid rgba(255,255,255,.3); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.btn-sm { padding: 8px 18px; font-size: .825rem; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow); transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card--dark { background: var(--dark2); border-color: rgba(255,255,255,.08); color: #E8E8E2; }
.card--accent-top { border-top: 3px solid var(--accent); }

/* ── Section header ──────────────────────────────────────── */
.section-header { margin-bottom: 56px; }
.section-header.text-center { text-align: center; }
.section-label {
  display: inline-block; font-size: .75rem; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
  background: rgba(74,111,165,.08); padding: 4px 12px;
  border-radius: 20px; margin-bottom: 16px;
}
.section-header h2 { margin-bottom: 16px; }
.section-header p { color: var(--muted); max-width: 600px; font-size: 1.05rem; }
.section-header.text-center p { margin: 0 auto; }

/* ── Divider ─────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--border); margin: 0; }

/* ── Tags ────────────────────────────────────────────────── */
.tag {
  display: inline-block; font-size: .75rem; font-weight: 500;
  padding: 3px 10px; border-radius: 12px; background: rgba(74,111,165,.1);
  color: var(--accent);
}

/* ── Icon box ────────────────────────────────────────────── */
.icon-box {
  width: 52px; height: 52px; border-radius: 12px;
  background: rgba(74,111,165,.1);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.icon-box svg { width: 24px; height: 24px; stroke: var(--accent); fill: none; }
.icon-box--lg { width: 64px; height: 64px; border-radius: 16px; }
.icon-box--lg svg { width: 30px; height: 30px; }

/* ── Stats ───────────────────────────────────────────────── */
.stat-num {
  font-family: 'Roboto', sans-serif; font-size: 2.5rem; font-weight: 700;
  color: var(--accent); line-height: 1;
}
.stat-label { font-size: .85rem; color: var(--muted); margin-top: 6px; }

/* ── Step / Process ──────────────────────────────────────── */
.step-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: .85rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  background: var(--dark);
  position: relative; overflow: hidden;
  padding: 120px 0 80px;
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(74,111,165,.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(74,111,165,.08) 0%, transparent 60%);
}
.hero__grid-overlay {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(74,111,165,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,111,165,.06) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero__content { position: relative; z-index: 1; }
.hero__label {
  font-size: .75rem; font-weight: 500; letter-spacing: .15em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 20px;
}
.hero h1 { color: #FFFFFF; margin-bottom: 24px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero__sub { font-size: 1.15rem; color: #9A9A94; max-width: 560px; margin-bottom: 40px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__visual {
  position: relative; z-index: 1;
  display: flex; align-items: center; justify-content: center;
}

/* ── Trust bar ───────────────────────────────────────────── */
.trust-bar {
  background: #FFFFFF; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 32px 0;
}
.trust-bar__inner {
  display: flex; align-items: center; gap: 48px; flex-wrap: wrap;
  justify-content: center;
}
.trust-bar__label { font-size: .8rem; color: var(--muted); font-weight: 500; white-space: nowrap; }
.trust-bar__items { display: flex; gap: 40px; align-items: center; flex-wrap: wrap; }
.trust-bar__item { font-size: .85rem; color: #8C8C8C; font-weight: 500; letter-spacing: .05em; }

/* ── Feature list ────────────────────────────────────────── */
.feature-item { display: flex; gap: 16px; }
.feature-item + .feature-item { margin-top: 24px; }

/* ── Diagram / Visual placeholder ───────────────────────── */
.diagram {
  background: linear-gradient(135deg, #1C2535 0%, #243044 100%);
  border-radius: 12px; padding: 32px;
  border: 1px solid rgba(74,111,165,.2);
}

/* ── Keyword cloud ───────────────────────────────────────── */
.kw-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.kw-tag {
  padding: 6px 14px; border-radius: 20px; font-size: .825rem; font-weight: 500;
  border: 1px solid var(--border); color: var(--text);
  transition: all .15s;
}
.kw-tag:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.kw-tag--core { background: rgba(74,111,165,.1); border-color: rgba(74,111,165,.3); color: var(--accent); }

/* ── Performance layers ──────────────────────────────────── */
.perf-layer {
  display: grid; grid-template-columns: 80px 1fr 260px; gap: 32px; align-items: start;
  padding: 40px 0; border-bottom: 1px solid var(--border);
}
.perf-layer:last-child { border-bottom: none; }
.perf-layer__num {
  font-family: 'Roboto', sans-serif; font-size: 3rem; font-weight: 700;
  color: rgba(74,111,165,.2); line-height: 1;
}
.perf-layer__data {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.perf-layer__data-num {
  font-family: 'Roboto', sans-serif; font-size: 1.8rem; font-weight: 700;
  color: var(--accent); line-height: 1;
}

/* ── ROI chart (CSS) ─────────────────────────────────────── */
.bar-chart { display: flex; align-items: flex-end; gap: 12px; height: 120px; }
.bar-chart__col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.bar-chart__bar {
  width: 100%; border-radius: 4px 4px 0 0;
  background: rgba(74,111,165,.2);
  transition: background .3s;
}
.bar-chart__bar--accent { background: var(--accent); }
.bar-chart__label { font-size: .7rem; color: var(--muted); text-align: center; }

/* ── News card ───────────────────────────────────────────── */
.news-card { display: flex; flex-direction: column; height: 100%; }
.news-card__img {
  aspect-ratio: 16/9; background: linear-gradient(135deg, #2E3A50, #3A4F70);
  border-radius: var(--radius) var(--radius) 0 0; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.news-card__body { flex: 1; padding: 24px; border: 1px solid var(--border); border-top: none; border-radius: 0 0 var(--radius) var(--radius); }
.news-card__date { font-size: .775rem; color: var(--muted); margin-bottom: 8px; }
.news-card__title { font-size: 1rem; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
.news-card__excerpt { font-size: .875rem; color: var(--muted); }
.news-card__tag { margin-bottom: 10px; }

/* ── Form ────────────────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  background: #fff; color: var(--text);
  font-family: inherit; font-size: .9rem;
  transition: border-color .15s;
  outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74,111,165,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-check { display: flex; gap: 10px; align-items: flex-start; font-size: .85rem; color: var(--muted); }
.form-check input { width: auto; margin-top: 3px; }

/* ── SVG illustrations ───────────────────────────────────── */
.geo-sphere {
  width: 320px; height: 320px;
  border-radius: 50%; overflow: hidden;
  border: 1px solid rgba(74,111,165,.3);
  position: relative;
  background: radial-gradient(circle at 35% 35%, #2A3F6B 0%, #141D30 60%, #0A1020 100%);
}

/* ── Flow chart ──────────────────────────────────────────── */
.flow { display: flex; align-items: center; gap: 0; flex-wrap: wrap; }
.flow__step {
  flex: 1; min-width: 120px; text-align: center;
  padding: 16px 8px;
}
.flow__step-box {
  background: rgba(74,111,165,.1); border: 1px solid rgba(74,111,165,.25);
  border-radius: var(--radius); padding: 12px 8px;
  font-size: .825rem; font-weight: 500; color: var(--text);
  margin-bottom: 8px;
}
.flow__arrow { color: var(--muted); font-size: 1.2rem; flex-shrink: 0; padding: 0 4px; }

/* ── Page hero (sub pages) ───────────────────────────────── */
.page-hero {
  background: var(--dark); color: #fff;
  padding: 140px 0 80px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 80% 50%, rgba(74,111,165,.15) 0%, transparent 70%);
}
.page-hero__content { position: relative; z-index: 1; }
.page-hero h1 { color: #fff; margin-bottom: 16px; }
.page-hero p { color: #9A9A94; font-size: 1.1rem; max-width: 600px; }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  background: var(--dark); color: #B0AFA8;
  padding: 64px 0 32px;
}
.footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08);
  margin-bottom: 32px;
}
/* 公司名称 + 产品线 GEO */
.footer__brand { color: #fff; font-size: 1.45rem; font-weight: 700; margin-bottom: 16px; }
.footer__brand span { color: var(--accent); font-weight: 600; font-size: 1rem; margin-left: 8px; letter-spacing: .06em; }
.footer__desc { font-size: .875rem; line-height: 1.7; max-width: 280px; }
.footer__col-title { font-size: .8rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: #fff; margin-bottom: 16px; }
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: .875rem; color: #8C8C8C; transition: color .15s; }
.footer__links a:hover { color: #fff; }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: .8rem; color: #5A5A54; }

/* ── Scroll reveal ───────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

/* ── Utility ─────────────────────────────────────────────── */
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.pt-0  { padding-top: 0; }
.pb-0  { padding-bottom: 0; }
.w-full { width: 100%; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  :root { --section-py: 64px; }
  .nav__links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; width: 100%; background: rgba(245,245,240,.98); padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 4px; align-items: stretch; }
  .nav__links.open { display: flex; }
  .nav__toggle { display: flex; }
  .nav__item--dropdown { width: 100%; }
  .nav__links > .nav__item--dropdown > .nav__trigger {
    width: 100%;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: var(--radius);
    -webkit-tap-highlight-color: transparent;
  }
  .nav__links > .nav__item--dropdown:active {
    background: rgba(74,111,165,.06);
  }
  /* 移动端：下拉区与桌面 hover 解耦，仅用 display + .is-open */
  .nav__item--dropdown .nav__dropdown {
    position: static !important;
    padding-top: 0 !important;
    min-width: 0 !important;
    display: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    pointer-events: auto !important;
    box-shadow: none !important;
  }
  .nav__item--dropdown.is-open .nav__dropdown {
    display: block !important;
  }
  /* 展开时箭头朝上 */
  .nav__links > li.nav__item--dropdown.is-open .nav__caret {
    transform: rotate(180deg);
    opacity: .85;
  }
  .nav__links > li.nav__item--dropdown:hover .nav__caret {
    transform: none;
  }
  .nav__dropdown-inner {
    margin: 6px 0 10px 0;
    padding: 6px 0;
    border: none;
    border-radius: 8px;
    background: rgba(74,111,165,.06);
    box-shadow: inset 0 0 0 1px rgba(74,111,165,.12);
  }
  .nav__dropdown-inner li + li a {
    border-top: 1px solid rgba(74,111,165,.1);
  }
  .nav__dropdown-inner a {
    padding: 12px 16px 12px 20px;
    white-space: normal;
    font-size: .8125rem;
    color: var(--text);
    border-radius: 0;
  }
  .nav__dropdown-inner li:hover {
    background: rgba(74,111,165,.1);
  }
  .nav__dropdown-inner li:hover > a {
    color: var(--accent);
  }
  .nav__dropdown-inner li:first-child a {
    border-radius: 8px 8px 0 0;
  }
  .nav__dropdown-inner li:last-child a {
    border-radius: 0 0 8px 8px;
  }
  .hero { padding: 100px 0 60px; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-2 .hero__visual { display: none; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .perf-layer { grid-template-columns: 48px 1fr; }
  .perf-layer__data { display: none; }
  .footer__grid { grid-template-columns: 1fr; gap: 24px; }
  .flow { flex-direction: column; }
  .flow__arrow { transform: rotate(90deg); }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  h1 { font-size: 1.75rem; }
}