/* ===== Taste-skill: Co-Mall 科码先锋 ===== */
/* Cobalt + Warm Slate · Geist · Precision Engineering */

@import url('https://fonts.googleapis.com/css2?family=Geist:wght@100..900&display=swap');

:root {
  --bg: #F7F6F3;
  --bg-white: #FFFFFF;
  --bg-alt: #F0EFEA;
  --surface: #FFFFFF;
  --surface-hover: #F5F4F0;

  --text: #18181B;
  --text-secondary: #52525B;
  --text-tertiary: #A1A1AA;
  --text-dim: #D4D4D8;

  --border: #E4E4E7;
  --border-hover: #D4D4D8;
  --border-light: #F0EFEA;

  --accent: #1D4ED8;
  --accent-hover: #2563EB;
  --accent-light: #EFF6FF;
  --accent-subtle: rgba(29,78,216,0.06);

  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-elevated: 0 4px 12px rgba(0,0,0,0.05);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --font-sans: "Geist", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

/* ===== Reset ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
::selection { background: var(--accent-light); color: var(--accent); }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }
img { max-width:100%; height:auto; display:block; }

/* ===== Navigation ===== */
.nav {
  position: fixed; top:0; left:0; right:0; z-index:100;
  height: 60px;
  display: flex; align-items: center;
  transition: background 0.4s cubic-bezier(0.4,0,0.2,1), box-shadow 0.4s cubic-bezier(0.4,0,0.2,1), backdrop-filter 0.4s;
}
.nav.scrolled {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.nav-inner {
  max-width: 1280px; width:100%; margin:0 auto;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex; align-items: center;
  text-decoration: none; flex-shrink: 0;
}
.nav-logo-img { height: 32px; width: auto; display: block; }

/* Center nav links - Apple/Google style */
.nav-center {
  display: flex; align-items: center;
  gap: 2px;
  flex: 1; justify-content: center;
  padding: 0 20px;
}
.nav-center a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px;
  font-size: 14px; font-weight: 500;
  letter-spacing: 0.01em;
  color: rgba(0,0,0,0.55);
  border-radius: 8px;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.nav-center a svg {
  width: 16px; height: 16px;
  flex-shrink: 0;
  opacity: 0.45;
  transition: opacity 0.2s;
}
.nav-center a:hover {
  color: rgba(0,0,0,0.85);
  background: rgba(0,0,0,0.04);
}
.nav-center a:hover svg { opacity: 0.75; }
.nav-center a.active {
  color: var(--accent);
  background: var(--accent-light);
}
.nav-center a.active svg { opacity: 0.85; }

/* Right side */
.nav-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.lang-btn {
  background: none; border: none;
  padding: 5px 10px; font-size: 13px; font-weight: 500;
  border-radius: 6px; cursor: pointer;
  font-family: inherit; transition: all 0.2s;
  color: rgba(0,0,0,0.45);
  letter-spacing: 0.02em;
}
.lang-btn.active { color: var(--accent); background: var(--accent-light); }
.lang-btn:hover { color: rgba(0,0,0,0.7); }
.lang-divider { color: rgba(0,0,0,0.15); font-size: 12px; }

/* Hamburger */
.hamburger {
  display: none; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: none; border: none; border-radius: 6px;
  color: rgba(0,0,0,0.5); cursor: pointer;
  transition: all 0.2s;
  padding: 0; margin-left: 4px;
}
.hamburger:hover {
  background: rgba(0,0,0,0.04);
  color: rgba(0,0,0,0.8);
}

/* ===== Full-screen Menu Overlay ===== */
.menu-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 150;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  flex-direction: column;
  padding: 20px;
}
.menu-overlay.open { display: flex; }
.menu-header { display: flex; justify-content: flex-end; }
.menu-close {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; border-radius: 50%;
  color: rgba(0,0,0,0.5); cursor: pointer;
  font-size: 20px; transition: all 0.2s;
}
.menu-close:hover { background: rgba(0,0,0,0.04); color: rgba(0,0,0,0.8); }
.menu-body {
  flex: 1; display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  gap: 2px; max-width: 320px; margin: 0 auto; width: 100%;
}
.menu-item {
  display: block; width: 100%;
  padding: 14px 20px;
  font-size: 16px; font-weight: 400;
  color: rgba(0,0,0,0.8);
  text-align: center;
  border-radius: 10px;
  transition: all 0.2s;
  text-decoration: none;
}
.menu-item:hover { background: rgba(0,0,0,0.04); color: var(--accent); }
.menu-item.active { color: var(--accent); background: var(--accent-light); }
.menu-divider { width: 100%; height: 1px; background: rgba(0,0,0,0.06); margin: 8px 0; }

/* ===== Container ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-white { background: var(--bg-white); }

/* ===== Eyebrow ===== */
.eyebrow {
  display: inline-block;
  font-size: 32px; font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ===== Reveal ===== */
.reveal { opacity:0; transform:translateY(16px); transition:opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.reveal.in-view { opacity:1; transform:translateY(0); }
.reveal-left { opacity:0; transform:translateX(-20px); transition:opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.reveal-left.in-view { opacity:1; transform:translateX(0); }
.reveal-right { opacity:0; transform:translateX(20px); transition:opacity 0.6s cubic-bezier(0.16,1,0.3,1), transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.reveal-right.in-view { opacity:1; transform:translateX(0); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-family: inherit; font-size: 14px; font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer; text-decoration: none;
  transition: all 0.3s;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 2px 6px rgba(var(--accent),0.2);
}
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 4px 12px rgba(29,78,216,0.3); transform: translateY(-1px); color:#fff; }

/* ===== Page Banner ===== */
.page-banner {
  padding: 96px 0 32px;
  text-align: center;
  background: var(--bg);
}
.page-banner-title {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 12px;
}
.page-banner-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--accent-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.page-banner-icon svg { width: 20px; height: 20px; }
.page-banner h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* ===== Cards ===== */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all 0.3s;
}
.card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--border-hover);
}

/* ===== Feature Pill ===== */
.feature-pill {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-white);
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.3s;
}
.feature-pill:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.feature-pill-icon {
  width: 36px; height: 36px;
  margin: 0 auto 12px;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}

/* ===== Leap Card (redesigned) ===== */
.leap-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
}
.leap-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
  transform: translateY(-3px);
}
.leap-card-num {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent);
  opacity: 0.2;
  line-height: 1;
  margin-bottom: 16px;
}
.leap-card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.leap-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Formula Section ===== */
.formula-num {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  user-select: none;
}
.formula-num-1 {
  background: linear-gradient(135deg, #1D4ED8, #3B82F6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.formula-num-11 {
  background: linear-gradient(135deg, #1D4ED8, #2563EB, #06B6D4);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: formula-shimmer 4s ease-in-out infinite;
}
@keyframes formula-shimmer {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.formula-card {
  border-radius: 12px;
  padding: 20px;
}
.formula-card-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== Tag Pills ===== */
.tag-pill {
  display: inline-block;
  padding: 5px 12px;
  font-size: 13px; font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(29,78,216,0.1);
}

/* ===== Partner Card ===== */
.partner-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px; text-align: center;
  transition: all 0.3s;
}
.partner-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.partner-card .partner-name { font-size: 15px; font-weight: 600; color: var(--text); }

/* ===== Logo Wall (Customer industries) ===== */
.logo-wall {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}
.logo-wall-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  text-align: center;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
}
.logo-wall-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(29,78,216,0.08);
  transform: translateY(-3px);
}
.logo-wall-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.logo-wall-img {
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-alt);
}
.logo-wall-img img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== Case Showcase ===== */
.case-showcase-title {
  text-align: center;
  margin-bottom: 48px;
}
.case-showcase-title .eyebrow {
  font-size: 32px;
  font-weight: 700;
}
.case-showcase-title p {
  font-size: 15px;
  color: var(--text-tertiary);
  margin-top: 8px;
}
.case-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
}
.case-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}
.case-card-img {
  overflow: hidden;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}
.case-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.case-card-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.case-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
  letter-spacing: -0.01em;
}
.case-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
@media (max-width: 768px) {
  .case-card { grid-template-columns: 1fr; }
  .case-card-body { padding: 20px; }
}
  height: auto;
  display: block;
}

/* ===== Capability Cards (Home 2nd screen) ===== */
.cap-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}
.cap-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
}
.cap-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(29,78,216,0.08);
  transform: translateY(-3px);
}
.cap-card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--accent-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
  transition: transform 0.35s cubic-bezier(0.16,1,0.3,1);
}
.cap-card:hover .cap-card-icon {
  transform: scale(1.05);
}
.cap-card-icon svg { width: 22px; height: 22px; }
.cap-card h3 {
  font-size: 16px; font-weight: 600;
  margin-bottom: 10px; color: var(--text);
  line-height: 1.3;
}
.cap-card p {
  font-size: 14px; color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border-light);
  background: var(--bg);
  padding: 48px 0 32px;
  margin-top: 60px;
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; }
.footer h3 { font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.footer .info-item { margin-bottom: 8px; }
.footer .info-label { font-size: 12px; color: var(--text-tertiary); display: block; margin-bottom: 2px; }
.footer .info-value { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.footer-divider { border: none; border-top: 1px solid var(--border-light); margin: 32px 0 24px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 12px; color: var(--text-tertiary); }
.footer-bottom a { font-size: 12px; color: var(--text-tertiary); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Modal ===== */
.modal-overlay {
  display: none;
  position: fixed; inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(6px);
  align-items: center; justify-content: center;
  padding: 16px;
}
.modal-overlay.open { display: flex; }
.modal-content {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 420px; width: 100%;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.modal-close {
  position: absolute; top: 20px; right: 20px;
  background: none; border: none;
  color: var(--text-tertiary); font-size: 18px; cursor: pointer;
}
.modal-content h2 { font-size: 17px; font-weight: 600; margin-bottom: 2px; }
.modal-sub { font-size: 11px; color: var(--text-tertiary); letter-spacing: 0.06em; margin-bottom: 20px; }
.modal-block { margin-bottom: 16px; }
.modal-block .lbl { font-size: 12px; color: var(--text-tertiary); font-weight: 500; margin-bottom: 2px; }
.modal-block .val { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

/* ===== Product Visual ===== */
.product-visual {
  max-width: 800px; margin: 0 auto;
  padding: 40px 24px;
  border-radius: var(--radius-xl);
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  text-align: center;
}

/* ===== Lifecycle bar ===== */
.lifecycle {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 8px; max-width: 650px; margin: 0 auto;
}
.lifecycle-step { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.lifecycle-dot {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
  background: var(--bg-alt); color: var(--text-secondary);
}
.lifecycle-dot.active { background: var(--accent-light); color: var(--accent); }
.lifecycle-label { font-size: 10px; color: var(--text-tertiary); }

/* ===== Grid Helpers ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.hide-mobile { display: block; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .nav-center { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 768px) {
  .hamburger { display: flex; }
}
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .hero { min-height: auto; padding: 80px 0 40px; }
  .hide-mobile { display: none !important; }
  .pain-leap-grid { grid-template-columns: 1fr !important; } /* kept for compatibility */
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
  .cap-card { padding: 24px 20px; }
  .logo-wall { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .lifecycle { flex-wrap: wrap; justify-content: center; }
  .leap-card { padding: 20px; }
  .menu-body { gap: 4px; }
  .menu-item { padding: 14px 20px; font-size: 15px; }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  .reveal, .reveal-left, .reveal-right { opacity: 1; transform: none; }
}