/* ===== CSS Variables ===== */
:root {
  --primary: #1688ff;
  --primary-dark: #0d6efd;
  --primary-light: #e8f3ff;
  --gradient: linear-gradient(135deg, #1688ff 0%, #0052d9 100%);
  --text: #1a1a2e;
  --text-secondary: #5a6270;
  --text-muted: #8c95a6;
  --bg: #ffffff;
  --bg-gray: #f5f7fa;
  --bg-dark: #0f1729;
  --border: #e8ecf0;
  --shadow: 0 4px 24px rgba(22, 136, 255, 0.08);
  --shadow-lg: 0 12px 48px rgba(22, 136, 255, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --header-h: 64px;
  --container: 1200px;
  --transition: 0.3s ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; border: none; outline: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 16px rgba(22, 136, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(22, 136, 255, 0.45); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-light); }
.btn-block { width: 100%; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.header.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
}
.logo-icon {
  width: 36px; height: 36px;
  background: var(--gradient);
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}
.nav { display: flex; align-items: center; gap: 8px; }
.nav a {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: var(--transition);
}
.nav a:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.is-active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 500;
}
.nav-cta {
  background: var(--gradient) !important;
  color: #fff !important;
  margin-left: 8px;
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 60px) 0 80px;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(22, 136, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(0, 82, 217, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, #f0f6ff 0%, #fff 100%);
  z-index: -1;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
  line-height: 1.75;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.stat-item {
  padding: 16px;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stat-item strong {
  display: block;
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 4px;
}
.stat-item span { font-size: 12px; color: var(--text-muted); }

/* ===== Home Hero ===== */
.home-hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 88px;
  overflow: hidden;
  text-align: center;
}
.home-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(22, 136, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(0, 82, 217, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, #f0f6ff 0%, #fff 100%);
  z-index: -1;
}
.home-hero-inner { max-width: 820px; margin: 0 auto; }
.home-hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.home-hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.home-hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.75;
}
.home-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 28px;
}
.home-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  justify-content: center;
  font-size: 13px;
  color: var(--text-muted);
}
.home-hero-meta span {
  padding: 4px 0;
}

/* ===== Home promo banner (below header) ===== */
.page-home {
  --promo-h: 224px;
}
.promo-banner {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 999;
  height: var(--promo-h);
  background: linear-gradient(105deg, #062a6e 0%, #0b5fff 38%, #1688ff 68%, #0039a6 100%);
  color: #fff;
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(11, 95, 255, 0.35);
  transition: height 0.28s ease, opacity 0.28s ease, box-shadow 0.28s ease;
}
.promo-banner-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 50% 120% at 8% 50%, rgba(255, 229, 102, 0.22) 0%, transparent 55%),
    radial-gradient(ellipse 40% 100% at 92% 40%, rgba(255, 255, 255, 0.12) 0%, transparent 50%),
    repeating-linear-gradient(
      -12deg,
      transparent 0,
      transparent 18px,
      rgba(255, 255, 255, 0.03) 18px,
      rgba(255, 255, 255, 0.03) 19px
    );
}
.promo-banner-bg::after {
  content: '';
  position: absolute;
  right: 12%;
  top: -40%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.12);
  animation: promoPulse 3.2s ease-in-out infinite;
}
@keyframes promoPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.12); opacity: 0.9; }
}
.promo-banner-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 100%;
  padding: 20px 0;
}
.promo-offer {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 18px;
  padding-right: 12px;
}
.promo-offer-label {
  writing-mode: vertical-rl;
  letter-spacing: 0.22em;
  font-size: 15px;
  font-weight: 700;
  color: #ffe566;
  text-shadow: 0 0 12px rgba(255, 229, 102, 0.35);
}
.promo-offer-discount {
  display: flex;
  align-items: flex-end;
  line-height: 0.85;
  padding: 16px 28px 12px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 229, 102, 0.45);
  border-radius: 20px;
  box-shadow: 0 0 0 6px rgba(255, 229, 102, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.promo-offer-num {
  font-size: 108px;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #ffe566;
  text-shadow: 0 6px 28px rgba(255, 229, 102, 0.5);
}
.promo-offer-unit {
  font-size: 40px;
  font-weight: 800;
  margin: 0 0 14px 4px;
  color: #fff;
}
.promo-banner-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  min-width: 0;
  flex: 1;
}
.promo-title {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.promo-desc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  margin: 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.92);
}
.promo-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.28);
  font-size: 15px;
  font-weight: 600;
}
.promo-chip--hot {
  background: rgba(255, 229, 102, 0.22);
  border-color: rgba(255, 229, 102, 0.55);
  color: #ffe566;
}
.promo-desc-text {
  font-size: 16px;
  font-weight: 500;
  opacity: 0.95;
  line-height: 1.5;
}
.promo-banner-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.promo-btn {
  padding: 16px 28px;
  border-radius: 12px;
  font-size: 17px;
  font-weight: 700;
  background: #ffe566;
  color: #0b2f7a;
  box-shadow: 0 8px 24px rgba(255, 229, 102, 0.4);
  transition: var(--transition);
}
.promo-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 24px rgba(255, 229, 102, 0.45);
}
.promo-btn--ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  box-shadow: none;
}
.promo-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: none;
}

.page-home .home-hero {
  padding-top: calc(var(--header-h) + var(--promo-h) + 48px);
}

/* ===== Home: two integration modes ===== */
.home-modes { background: var(--bg); }
.modes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 28px;
}
.mode-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.mode-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.mode-card--loop {
  border-color: rgba(22, 136, 255, 0.28);
}
.mode-card--standalone {
  background: linear-gradient(180deg, #f8fbff 0%, #fff 48%);
}
.mode-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  margin-bottom: 14px;
}
.mode-badge--alt {
  background: var(--primary-light);
  color: var(--primary);
}
.mode-card-head h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.mode-card-head p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}
.mode-flow-mini {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  padding: 14px 16px;
  background: var(--bg-gray);
  border-radius: 10px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-secondary);
}
.mode-flow-mini i {
  font-style: normal;
  color: var(--primary);
  font-weight: 600;
}
.mode-flow-core {
  padding: 4px 10px;
  background: var(--gradient);
  color: #fff !important;
  border-radius: 6px;
  font-weight: 600;
  font-size: 12px;
}
.mode-flow-mini--stack {
  flex-direction: column;
  align-items: stretch;
  text-align: center;
  gap: 10px;
}
.mode-sources {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.mode-sources span {
  padding: 4px 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}
.mode-points {
  margin-bottom: 18px;
  flex: 1;
}
.mode-points li {
  position: relative;
  padding: 5px 0 5px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.mode-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.mode-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.mode-link:hover { text-decoration: underline; }
.modes-footnote {
  padding: 16px 20px;
  background: var(--primary-light);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  text-align: center;
}
.modes-footnote strong { color: var(--primary); }

/* ===== Home: business loop ===== */
.home-loop { background: var(--bg-gray); }
.loop-flow {
  display: flex;
  align-items: stretch;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.loop-step {
  flex: 1 1 200px;
  max-width: 260px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: var(--transition);
}
.loop-step:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.loop-step--core {
  background: var(--gradient);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-lg);
  max-width: 280px;
}
.loop-step--return {
  border-color: rgba(22, 136, 255, 0.35);
  box-shadow: var(--shadow);
}
.loop-step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.loop-step--core .loop-step-num { color: rgba(255, 255, 255, 0.7); }
.loop-step-sys {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.loop-sys-code {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
}
.loop-step--core .loop-sys-code { color: rgba(255, 255, 255, 0.75); }
.loop-sys-link {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}
.loop-step--core .loop-sys-link { color: rgba(255, 255, 255, 0.85); }
.loop-step h3 {
  font-size: 17px;
  margin-bottom: 10px;
}
.loop-step p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}
.loop-step--core p { color: rgba(255, 255, 255, 0.88); }
.loop-arrow {
  display: flex;
  align-items: center;
  color: var(--primary);
  font-size: 22px;
  font-weight: 600;
  flex: 0 0 auto;
  padding-top: 48px;
}
.loop-diagram {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow);
}
.loop-diagram-track {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 4px;
}
.loop-node {
  min-width: 110px;
  padding: 14px 16px;
  text-align: center;
  background: var(--bg-gray);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.loop-node strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
  color: var(--text);
}
.loop-node span {
  font-size: 12px;
  color: var(--text-muted);
}
.loop-node--core {
  background: var(--gradient);
  border: none;
  color: #fff;
  box-shadow: 0 4px 16px rgba(22, 136, 255, 0.3);
}
.loop-node--core strong,
.loop-node--core span { color: #fff; }
.loop-node--core span { opacity: 0.85; }
.loop-node--back {
  background: var(--primary-light);
  border-color: transparent;
}
.loop-node--back strong { color: var(--primary); }
.loop-connector {
  display: flex;
  align-items: center;
  padding: 0 6px;
  position: relative;
  min-width: 64px;
  justify-content: center;
}
.loop-connector::before {
  content: '';
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  height: 2px;
  background: linear-gradient(90deg, rgba(22, 136, 255, 0.2), var(--primary), rgba(22, 136, 255, 0.2));
}
.loop-connector span {
  position: relative;
  z-index: 1;
  padding: 2px 8px;
  background: #fff;
  font-size: 11px;
  color: var(--primary);
  white-space: nowrap;
  border-radius: 10px;
  border: 1px solid rgba(22, 136, 255, 0.2);
}
.loop-diagram-note {
  margin-top: 20px;
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.home-products { background: var(--bg); }
.home-product-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.home-product-list--matrix .home-product-card--accent {
  background: var(--gradient);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-lg);
}
.home-product-list--matrix .home-product-card--accent .home-product-rank {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}
.home-product-list--matrix .home-product-card--accent .home-product-code {
  color: rgba(255, 255, 255, 0.7);
}
.home-product-list--matrix .home-product-card--accent .home-product-tagline {
  color: rgba(255, 255, 255, 0.9);
}
.home-product-list--matrix .home-product-card--accent > p {
  color: rgba(255, 255, 255, 0.85);
}
.home-product-list--matrix .home-product-card--accent li {
  color: rgba(255, 255, 255, 0.9);
}
.home-product-list--matrix .home-product-card--accent li::before {
  background: rgba(255, 255, 255, 0.6);
}
.home-product-list--matrix .home-product-card--accent .home-product-go {
  color: #fff;
}
.home-product-list--flow .home-product-card--flagship {
  order: 0;
}
.home-product-card--flagship .home-product-rank {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}
.home-product-card {
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.home-product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.home-product-card--flagship {
  background: var(--gradient);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-lg);
}
.home-product-card--secondary {
  border-color: rgba(22, 136, 255, 0.35);
  box-shadow: var(--shadow);
}
.home-product-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.home-product-rank {
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}
.home-product-card--flagship .home-product-rank {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}
.home-product-card--secondary .home-product-rank {
  background: var(--primary);
  color: #fff;
}
.home-product-code {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
}
.home-product-card--flagship .home-product-code { color: rgba(255, 255, 255, 0.7); }
.home-product-card h3 { font-size: 22px; margin-bottom: 8px; }
.home-product-tagline {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 14px;
  color: var(--primary);
}
.home-product-card--flagship .home-product-tagline { color: rgba(255, 255, 255, 0.9); }
.home-product-card > p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex: 1;
}
.home-product-card--flagship > p { color: rgba(255, 255, 255, 0.85); }
.home-product-card ul { margin-bottom: 24px; }
.home-product-card li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0 4px 16px;
  position: relative;
}
.home-product-card li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 6px;
  background: var(--primary);
  border-radius: 50%;
}
.home-product-card--flagship li { color: rgba(255, 255, 255, 0.9); }
.home-product-card--flagship li::before { background: rgba(255, 255, 255, 0.6); }
.home-product-go {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
}
.home-product-card--flagship .home-product-go { color: #fff; }
.home-why { background: var(--bg-gray); }
.home-why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.home-why-card {
  background: #fff;
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.home-why-card strong {
  display: block;
  font-size: 28px;
  color: var(--primary-light);
  margin-bottom: 12px;
}
.home-why-card h3 { font-size: 17px; margin-bottom: 10px; }
.home-why-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Product Hero ===== */
.page-product { padding-top: 0; }
.product-hero {
  position: relative;
  padding: calc(var(--header-h) + 56px) 0 48px;
  overflow: hidden;
}
.product-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(22, 136, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(0, 82, 217, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, #f0f6ff 0%, #fff 100%);
  z-index: -1;
}
.product-hero-inner { max-width: 860px; }
.product-hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.product-hero h1 {
  font-size: clamp(30px, 4.5vw, 46px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.product-hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 680px;
  line-height: 1.75;
}
.product-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.product-hero .hero-stats {
  margin-bottom: 32px;
  max-width: 720px;
}
.product-subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(22, 136, 255, 0.12);
}
.product-subnav a {
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: var(--transition);
}
.product-subnav a:hover {
  color: var(--primary);
  border-color: rgba(22, 136, 255, 0.35);
  background: var(--primary-light);
}

/* Dashboard Mock */
.dashboard-mock {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.mock-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }
.mock-title { margin-left: 8px; font-size: 13px; color: var(--text-muted); }
.mock-body { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 16px; min-height: 300px; }
.mock-col-title { font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
.mock-col-title em { font-style: normal; color: var(--primary); font-weight: 600; }
.mock-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  min-height: 56px;
  padding: 8px 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  margin-bottom: 8px;
}
.mock-card.fail {
  background: #fff5f5;
  border-color: #ffd6d6;
  border-left-color: #ff4d4f;
}
.mock-card-no {
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  font-family: "SF Mono", Consolas, "Courier New", monospace;
  letter-spacing: -0.02em;
}
.mock-card-type {
  font-size: 11px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mock-card-spec {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}
.mock-card-paper,
.mock-card-orient {
  padding: 1px 5px;
  background: var(--bg-gray);
  border-radius: 3px;
  font-size: 10px;
  color: var(--text-muted);
  line-height: 1.4;
}
.mock-card-copies {
  font-size: 10px;
  color: var(--primary);
  font-weight: 600;
}
.mock-card.fail .mock-card-no { color: #cf1322; }
.mock-card.fail .mock-card-type { color: #a8071a; }
.mock-card.fail .mock-card-paper,
.mock-card.fail .mock-card-orient {
  background: #fff1f0;
  color: #ff7875;
}
.mock-card.fail .mock-card-copies { color: #ff4d4f; }
.col-fail .mock-col-title em { color: #ff4d4f; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ===== Sections Common ===== */
.section { padding: 80px 0; }
.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }
.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.3;
}
.section-desc { color: var(--text-secondary); margin-top: 12px; font-size: 16px; }

/* ===== Product Matrix ===== */
.products-section { background: var(--bg); }
.products-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.product-pitch {
  position: relative;
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.product-pitch:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-pitch--flagship {
  background: var(--gradient);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-lg);
}
.product-pitch--secondary {
  border-color: rgba(22, 136, 255, 0.35);
  box-shadow: var(--shadow);
}
.pitch-rank {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
  background: var(--primary-light);
  color: var(--primary);
}
.product-pitch--flagship .pitch-rank {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}
.product-pitch--secondary .pitch-rank {
  background: var(--primary);
  color: #fff;
}
.pitch-code {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 8px;
}
.product-pitch--flagship .pitch-code { color: rgba(255, 255, 255, 0.7); }
.product-pitch h3 {
  font-size: 22px;
  margin-bottom: 8px;
}
.pitch-tagline {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 14px;
  color: var(--primary);
}
.product-pitch--flagship .pitch-tagline { color: rgba(255, 255, 255, 0.9); }
.product-pitch > p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex: 1;
}
.product-pitch--flagship > p { color: rgba(255, 255, 255, 0.85); }
.product-pitch ul { margin-bottom: 24px; }
.product-pitch li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0 4px 16px;
  position: relative;
}
.product-pitch li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 6px;
  background: var(--primary);
  border-radius: 50%;
}
.product-pitch--flagship li { color: rgba(255, 255, 255, 0.9); }
.product-pitch--flagship li::before { background: rgba(255, 255, 255, 0.6); }
.product-pitch .btn { margin-top: auto; }
.product-pitch--flagship .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: none;
}
.product-pitch--flagship .btn-primary:hover {
  background: rgba(255, 255, 255, 0.92);
  transform: translateY(-2px);
}

.tms-section { background: var(--bg-gray); }
.spd-section { background: var(--bg); }
.product-cta-bar {
  margin-top: 48px;
  padding: 28px 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
}
.tms-section .product-cta-bar { background: #fff; }
.spd-section .product-cta-bar {
  background: linear-gradient(135deg, #f0f6ff 0%, #fff 100%);
}
.product-cta-bar p {
  flex: 1;
  min-width: 240px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Pain Points ===== */
.pain-section { background: var(--bg-gray); }
.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pain-card {
  background: #fff;
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.pain-icon { font-size: 32px; margin-bottom: 16px; }
.pain-card h3 { font-size: 17px; margin-bottom: 10px; }
.pain-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card:hover { box-shadow: var(--shadow-lg); border-color: rgba(22,136,255,0.2); }
.feature-card.featured {
  background: var(--gradient);
  color: #fff;
  border: none;
}
.feature-card.featured .feature-num { color: rgba(255,255,255,0.3); }
.feature-card.featured p { color: rgba(255,255,255,0.85); }
.feature-card.featured li { color: rgba(255,255,255,0.9); }
.feature-card.featured li::before { background: rgba(255,255,255,0.6); }
.feature-num {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 16px;
}
.feature-card h3 { font-size: 20px; margin-bottom: 12px; }
.feature-card p { color: var(--text-secondary); margin-bottom: 16px; font-size: 14px; line-height: 1.7; }
.feature-card li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0 4px 16px;
  position: relative;
}
.feature-card li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ===== Product Tabs ===== */
.product-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 32px;
}
.tab-btn {
  padding: 10px 18px;
  background: var(--bg-gray);
  color: var(--text-secondary);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition);
}
.tab-btn:hover { background: var(--primary-light); color: var(--primary); }
.tab-btn.active { background: var(--gradient); color: #fff; }
.product-panels { position: relative; min-height: 320px; }
.product-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  animation: fadeIn 0.4s ease;
}
.product-panel.active { display: grid; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.panel-text h3 { font-size: 24px; margin-bottom: 12px; }
.panel-text p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }
.panel-text li {
  padding: 6px 0 6px 20px;
  position: relative;
  color: var(--text-secondary);
  font-size: 14px;
}
.panel-text li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 600;
}
.panel-visual {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 32px;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Panel visual elements */
.code-block {
  background: #1e293b;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 10px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 13px;
  width: 100%;
}
.code-line { padding: 4px 0; }
.code-line .key { color: #7dd3fc; }
.code-line .val { color: #86efac; }
.flow-diagram { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: center; }
.flow-node {
  padding: 12px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.flow-node.highlight { background: var(--primary); color: #fff; border-color: var(--primary); }
.flow-arrow { color: var(--primary); font-weight: 600; }
.timeline { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.tl-item {
  padding: 10px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.tl-item.done { background: var(--primary-light); color: var(--primary); border-color: transparent; }
.tl-item.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.board-mini { display: flex; gap: 10px; width: 100%; align-items: stretch; }
.board-col-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.board-col-head {
  padding: 8px 10px;
  border-radius: 8px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}
.board-col-head em { font-style: normal; opacity: 0.85; font-weight: 500; }
.board-job {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.board-job--fail {
  background: #fff5f5;
  border-color: #ffd6d6;
}
.board-job-no {
  font-size: 10px;
  font-weight: 600;
  color: var(--text);
  font-family: "SF Mono", Consolas, "Courier New", monospace;
}
.board-job-type {
  font-size: 10px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.board-job-spec {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px;
}
.board-job-paper,
.board-job-orient {
  padding: 1px 4px;
  background: var(--bg-gray);
  border-radius: 3px;
  font-size: 9px;
  color: var(--text-muted);
  line-height: 1.4;
}
.board-job-copies {
  font-size: 9px;
  color: var(--primary);
  font-weight: 600;
}
.board-job--fail .board-job-no { color: #cf1322; }
.board-job--fail .board-job-type { color: #a8071a; }
.board-job--fail .board-job-paper,
.board-job--fail .board-job-orient {
  background: #fff1f0;
  color: #ff7875;
}
.board-job--fail .board-job-copies { color: #ff4d4f; }
.b-blue { background: #1688ff; }
.b-gray { background: #8c95a6; }
.b-red { background: #ff4d4f; }
.template-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; width: 100%; }
.tpl-card {
  padding: 20px 10px;
  background: #fff;
  border: 1px dashed var(--primary);
  border-radius: 8px;
  text-align: center;
  font-size: 12px;
  color: var(--primary);
}
.sync-diagram { text-align: center; width: 100%; }
.sync-src {
  display: inline-block;
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin: 4px;
  font-size: 13px;
}
.sync-arrow { margin: 12px 0; color: var(--primary); font-size: 14px; }
.sync-target {
  display: inline-block;
  padding: 14px 32px;
  background: var(--gradient);
  color: #fff;
  border-radius: 10px;
  font-weight: 600;
}
.panel-more {
  display: inline-block;
  margin-top: 8px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
}
.panel-more:hover { text-decoration: underline; }
.integ-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  width: 100%;
}
.integ-mini span {
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text);
  transition: var(--transition);
}
.integ-mini span:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

/* ===== Data Integration (zigzag) ===== */
.integration-section { background: #fff; }
.integ-list { display: flex; flex-direction: column; gap: 0; }
.integ-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}
.integ-row:last-child { border-bottom: none; padding-bottom: 0; }
.integ-row:first-child { padding-top: 8px; }
.integ-row--reverse .integ-visual { order: 2; }
.integ-row--reverse .integ-text { order: 1; }
.integ-text h3 {
  font-size: 28px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.integ-text p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.85;
  text-align: justify;
}
.integ-text ul { margin: 0; }
.integ-text li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.7;
}
.integ-text li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.integ-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}
.integ-illust {
  width: 100%;
  max-width: 420px;
  min-height: 240px;
  padding: 28px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 20% 20%, rgba(22, 136, 255, 0.12), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(0, 82, 217, 0.1), transparent 40%),
    linear-gradient(160deg, #f0f6ff 0%, #e8f0fb 100%);
  border: 1px solid rgba(22, 136, 255, 0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.integ-illust-node,
.integ-illust-layer,
.integ-illust-hub,
.integ-illust-pipe,
.integ-illust-canvas,
.integ-svc-hub,
.integ-svc-gw,
.integ-q-grid span,
.integ-svc-ways span,
.g-node {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text);
  box-shadow: 0 4px 14px rgba(15, 23, 41, 0.04);
}
.integ-illust--collect {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  align-content: center;
}
.integ-illust--collect .integ-illust-node { text-align: center; }
.integ-illust-pipe {
  grid-column: 1 / -1;
  text-align: center;
  background: var(--primary-light);
  color: var(--primary);
  border-color: transparent;
  font-weight: 600;
}
.integ-illust-hub {
  grid-column: 1 / -1;
  text-align: center;
  background: var(--gradient);
  color: #fff;
  border: none;
  font-weight: 600;
}
.integ-illust--model { gap: 10px; }
.integ-illust-layer {
  width: 100%;
  text-align: center;
}
.integ-illust-layer.highlight {
  background: var(--gradient);
  color: #fff;
  border: none;
  font-weight: 600;
}
.integ-illust-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  width: 100%;
}
.integ-illust-flow span {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
}
.integ-illust-flow i {
  width: 16px;
  height: 2px;
  background: var(--primary);
  display: inline-block;
  position: relative;
}
.integ-illust-flow i::after {
  content: '';
  position: absolute;
  right: -2px;
  top: -3px;
  border: 4px solid transparent;
  border-left-color: var(--primary);
}
.integ-illust-canvas {
  width: 100%;
  text-align: center;
  background: var(--primary-light);
  color: var(--primary);
  border-color: transparent;
  font-weight: 600;
}
.integ-illust-graph {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  width: 100%;
}
.g-node { font-size: 12px; padding: 8px 10px; }
.g-line {
  width: 18px;
  height: 2px;
  background: var(--primary);
  opacity: 0.55;
}
.integ-illust-caption {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
}
.integ-q-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}
.integ-q-grid span {
  text-align: center;
  font-size: 13px;
  color: var(--primary);
  border-color: rgba(22, 136, 255, 0.25);
  background: rgba(255, 255, 255, 0.9);
}
.integ-svc-hub {
  width: 100%;
  text-align: center;
  background: var(--gradient);
  color: #fff;
  border: none;
  font-weight: 600;
}
.integ-svc-ways {
  display: flex;
  gap: 10px;
  width: 100%;
  justify-content: center;
}
.integ-svc-ways span {
  flex: 1;
  text-align: center;
  font-weight: 500;
}
.integ-svc-gw {
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
}
.tenant-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
  position: relative;
}
.tenant-box {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
  font-size: 13px;
}
.tenant-platform {
  grid-column: 1 / -1;
  padding: 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
  margin-top: 8px;
}
.security-badges { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; width: 100%; }
.sec-badge {
  padding: 16px;
  background: #fff;
  border: 2px solid var(--primary);
  border-radius: 10px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

/* ===== Scenes ===== */
.scenes-section { background: var(--bg-gray); }
.scenes-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.scene-card {
  background: #fff;
  padding: 24px 16px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.scene-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.scene-card span { font-size: 36px; display: block; margin-bottom: 12px; }
.scene-card h4 { font-size: 15px; margin-bottom: 6px; }
.scene-card p { font-size: 12px; color: var(--text-muted); }

/* ===== Solutions ===== */
.solutions-list { display: flex; flex-direction: column; gap: 20px; }
.solution-item {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.solution-item::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--gradient);
}
.solution-item:hover { box-shadow: var(--shadow); }
.solution-tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 10px;
}
.solution-item h3 { font-size: 20px; margin-bottom: 10px; }
.solution-item p { color: var(--text-secondary); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.solution-result { display: flex; gap: 16px; flex-wrap: wrap; }
.solution-result span {
  padding: 6px 14px;
  background: var(--bg-gray);
  border-radius: 6px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}

/* ===== Cases ===== */
.cases-section { background: var(--bg-gray); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.case-card:hover { box-shadow: var(--shadow-lg); }
.case-industry {
  display: inline-block;
  padding: 4px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-size: 12px;
  margin-bottom: 12px;
}
.case-card h3 { font-size: 18px; margin-bottom: 12px; }
.case-challenge { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.7; }
.case-result {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  line-height: 1.7;
}

/* ===== Journey / 成长历程 ===== */
.journey-section {
  background: linear-gradient(180deg, #fff 0%, #f0f6ff 50%, #fff 100%);
  position: relative;
  overflow: hidden;
}
.journey-section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent 0%, rgba(22, 136, 255, 0.15) 20%, rgba(22, 136, 255, 0.15) 80%, transparent 100%);
  pointer-events: none;
}
.journey-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 56px;
}
.journey-stat {
  text-align: center;
  padding: 24px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.journey-stat:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.journey-stat strong {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}
.journey-stat span { font-size: 13px; color: var(--text-muted); }
.journey-stat--highlight {
  background: var(--gradient);
  border: none;
  color: #fff;
}
.journey-stat--highlight strong,
.journey-stat--highlight span { color: #fff; }
.journey-stat--highlight span { opacity: 0.85; }

.journey-timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 0 16px;
}
.journey-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 50%, var(--primary-light) 100%);
  border-radius: 2px;
}
.journey-item {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 40px;
  position: relative;
}
.journey-item:last-child { margin-bottom: 0; }
.journey-item:nth-child(odd) .journey-card { grid-column: 1; grid-row: 1; }
.journey-item:nth-child(odd) .journey-marker { grid-column: 2; grid-row: 1; }
.journey-item:nth-child(even) .journey-card { grid-column: 3; grid-row: 1; }
.journey-item:nth-child(even) .journey-marker { grid-column: 2; grid-row: 1; }

.journey-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 8px;
  z-index: 1;
}
.journey-year {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  background: #fff;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--primary-light);
  white-space: nowrap;
}
.journey-dot {
  width: 14px;
  height: 14px;
  background: #fff;
  border: 3px solid var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--primary-light);
}
.journey-dot--pulse {
  background: var(--primary);
  animation: journeyPulse 2s ease-in-out infinite;
}
@keyframes journeyPulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--primary-light), 0 0 0 0 rgba(22, 136, 255, 0.4); }
  50% { box-shadow: 0 0 0 4px var(--primary-light), 0 0 0 8px rgba(22, 136, 255, 0); }
}

.journey-card {
  background: #fff;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.journey-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(22, 136, 255, 0.25);
}
.journey-card--current {
  background: linear-gradient(135deg, #f8fbff 0%, #eef5ff 100%);
  border: 2px solid var(--primary);
  color: var(--text);
  box-shadow: 0 8px 32px rgba(22, 136, 255, 0.15);
  position: relative;
  overflow: hidden;
}
.journey-card--current::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient);
}
.journey-card--current:hover {
  border-color: var(--primary);
  box-shadow: 0 12px 40px rgba(22, 136, 255, 0.22);
}
.journey-card--current .journey-version {
  background: var(--gradient);
  color: #fff;
}
.journey-card--current h3 {
  color: var(--text);
}
.journey-card--current p {
  color: var(--text-secondary);
}
.journey-card--current .journey-tags li {
  background: var(--primary-light);
  color: var(--primary);
  border-color: rgba(22, 136, 255, 0.2);
}

.journey-version {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
}
.journey-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  line-height: 1.4;
}
.journey-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}
.journey-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.journey-tags li {
  padding: 4px 12px;
  background: var(--bg-gray);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
}

.journey-quote {
  max-width: 640px;
  margin: 56px auto 0;
  padding: 32px 40px;
  text-align: center;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(22, 136, 255, 0.35);
  position: relative;
}
.journey-quote::before {
  content: '"';
  position: absolute;
  top: -8px;
  left: 28px;
  font-size: 64px;
  line-height: 1;
  color: var(--primary-light);
  font-family: Georgia, serif;
}
.journey-quote p {
  font-size: 17px;
  color: var(--text);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 12px;
}
.journey-quote cite {
  font-size: 13px;
  color: var(--text-muted);
  font-style: normal;
}

/* ===== Compare Table ===== */
.compare-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.compare-table thead th {
  background: var(--bg-gray);
  font-weight: 600;
}
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody tr:hover { background: #fafbfc; }
.col-old { color: var(--text-muted); }
.col-new { color: var(--primary); font-weight: 500; }
.compare-table .col-new { background: rgba(22, 136, 255, 0.04); }

/* ===== Pricing ===== */
.pricing-section { background: var(--bg-gray); }
.pricing-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-muted);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
}
.pricing-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.pricing-card--featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}
.pricing-card--featured:hover { transform: scale(1.02) translateY(-4px); }
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--gradient);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  white-space: nowrap;
}
.pricing-card-head { margin-bottom: 20px; }
.pricing-card-head h3 {
  font-size: 22px;
  margin-bottom: 8px;
}
.pricing-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  min-height: 44px;
}
.pricing-price {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 2px 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.pricing-price--custom {
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}
.price-currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
}
.price-amount {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.02em;
}
.pricing-price--custom .price-amount { font-size: 28px; }
.price-unit {
  font-size: 14px;
  color: var(--text-muted);
  width: 100%;
}
.pricing-features {
  flex: 1;
  margin-bottom: 28px;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  border-bottom: 1px dashed var(--border);
}
.pricing-features li:last-child { border-bottom: none; }
.feat-tag {
  flex-shrink: 0;
  display: inline-block;
  min-width: 28px;
  padding: 2px 6px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  text-align: center;
}
.feat-tag.feat-optional {
  background: #f5f5f5;
  color: var(--text-muted);
}
.pricing-disclaimer {
  margin-top: 32px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== CTA ===== */
.cta-section { background: var(--bg-dark); color: #fff; }
.cta-box {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.cta-box h2 {
  font-size: clamp(26px, 4vw, 36px);
  margin-bottom: 12px;
}
.cta-box > p { color: rgba(255,255,255,0.7); margin-bottom: 36px; font-size: 16px; }
.contact-form { text-align: left; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  color: #fff;
  transition: var(--transition);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(255,255,255,0.4); }
.contact-form select { color: rgba(255,255,255,0.6); }
.contact-form select option { color: var(--text); background: #fff; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  background: rgba(255,255,255,0.12);
}
.contact-form textarea { margin-bottom: 16px; resize: vertical; }
.cta-note { margin-top: 16px; font-size: 13px; color: rgba(255,255,255,0.5); }

/* ===== Footer ===== */
.footer { background: #0a0f1a; color: rgba(255,255,255,0.7); padding-top: 60px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand p { margin-top: 12px; font-size: 14px; color: rgba(255,255,255,0.5); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 16px; }
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  padding: 4px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

/* ===== Back to Top ===== */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px; height: 44px;
  background: var(--gradient);
  color: #fff;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}
.back-top.visible { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-3px); }

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: calc(var(--header-h) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #1a1a2e;
  color: #fff;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 520px; margin: 0 auto; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .product-panel { grid-template-columns: 1fr; }
  .integ-row {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 36px 0;
  }
  .integ-row--reverse .integ-visual,
  .integ-row--reverse .integ-text { order: unset; }
  .integ-text h3 { font-size: 24px; }
  .integ-visual { min-height: 200px; }
  .scenes-grid { grid-template-columns: repeat(3, 1fr); }
  .cases-grid { grid-template-columns: 1fr; }
  .journey-stats { grid-template-columns: repeat(2, 1fr); }
  .journey-timeline::before { left: 20px; transform: none; }
  .journey-item {
    grid-template-columns: auto 1fr;
    gap: 20px;
    padding-left: 0;
  }
  .journey-item:nth-child(odd) .journey-card,
  .journey-item:nth-child(even) .journey-card { grid-column: 2; grid-row: 1; }
  .journey-item:nth-child(odd) .journey-marker,
  .journey-item:nth-child(even) .journey-marker { grid-column: 1; grid-row: 1; }
  .journey-section::before { display: none; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .pricing-card--featured { transform: none; order: -1; }
  .pricing-card--featured:hover { transform: translateY(-4px); }
  .products-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .product-pitch--flagship { order: -1; }
  .home-product-list { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .home-product-card--flagship { order: 0; }
  .home-product-list--flow .home-product-card--flagship {
    order: 0;
    transform: none;
  }
  .home-product-list--flow .home-product-card--flagship:hover {
    transform: translateY(-4px);
  }
  .home-product-list--matrix .home-product-card--accent { order: 0; }
  .modes-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto 28px; }
  .loop-arrow { display: none; }
  .loop-step,
  .loop-step--core { max-width: none; flex: 1 1 100%; }
  .loop-connector { min-width: 100%; justify-content: flex-start; padding: 4px 0; }
  .loop-connector::before {
    left: 16px; right: auto;
    top: 0; bottom: 0;
    width: 2px; height: auto;
  }
  .home-why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 768px) {
  :root { --header-h: 56px; }
  .section { padding: 56px 0; }
  .menu-toggle { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-110%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav a { width: 100%; padding: 12px 16px; }
  .nav-cta { margin-left: 0 !important; text-align: center; }
  .hero { padding-top: calc(var(--header-h) + 32px); min-height: auto; }
  .hero h1 br { display: none; }
  .hero-desc { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .product-hero { padding-top: calc(var(--header-h) + 32px); }
  .product-hero-actions { flex-direction: column; }
  .product-hero-actions .btn { width: 100%; }
  .product-subnav { gap: 6px; }
  .product-subnav a { padding: 6px 12px; font-size: 12px; }
  .home-why-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .pain-grid { grid-template-columns: 1fr; }
  .product-tabs { gap: 6px; }
  .tab-btn { padding: 8px 12px; font-size: 13px; }
  .panel-visual { padding: 20px; min-height: 160px; }
  .integ-text h3 { font-size: 22px; }
  .integ-text p,
  .integ-text li { font-size: 15px; }
  .integ-illust { min-height: 200px; padding: 20px; }
  .integ-q-grid { grid-template-columns: repeat(2, 1fr); }
  .integ-illust--collect { grid-template-columns: 1fr; }
  .scenes-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-item { padding: 24px 20px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .mock-body { grid-template-columns: 1fr; min-height: auto; }
  .template-grid { grid-template-columns: 1fr; }
  .security-badges { grid-template-columns: repeat(2, 1fr); }
  .board-mini { flex-direction: column; }
  .board-col-wrap { width: 100%; }
  .journey-stats { grid-template-columns: 1fr 1fr; }
  .journey-quote { padding: 24px 20px; }
  .journey-quote p { font-size: 15px; }
  .product-cta-bar { padding: 20px; }
  .product-cta-bar .btn { width: 100%; }
  .page-home {
    --promo-h: 336px;
  }
  .promo-banner-inner {
    flex-wrap: wrap;
    align-content: center;
    gap: 14px 16px;
    padding: 16px 0;
  }
  .promo-offer {
    gap: 10px;
  }
  .promo-offer-label {
    writing-mode: horizontal-tb;
    letter-spacing: 0.08em;
    font-size: 13px;
  }
  .promo-offer-discount {
    padding: 10px 18px 8px;
    border-radius: 14px;
  }
  .promo-offer-num { font-size: 72px; }
  .promo-offer-unit { font-size: 26px; margin-bottom: 8px; }
  .promo-title { font-size: 22px; }
  .promo-desc { gap: 8px; }
  .promo-chip { padding: 6px 12px; font-size: 13px; }
  .promo-desc-text { font-size: 14px; width: 100%; }
  .promo-banner-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .promo-btn { padding: 14px 18px; font-size: 15px; }
  .promo-btn--ghost { display: inline-flex; }
  .promo-banner-bg::after { display: none; }
  .page-home .nav.open {
    top: calc(var(--header-h) + var(--promo-h));
  }
  .page-home .home-hero {
    padding-top: calc(var(--header-h) + var(--promo-h) + 28px);
  }
}

@media (max-width: 480px) {
  .scenes-grid { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-template-columns: 1fr; }
  .compare-table th,
  .compare-table td { padding: 12px 14px; font-size: 13px; }
}