/* ============================================
   苏州构程科技 - 官网样式
   深色科技风设计系统
   ============================================ */

/* ---------- Design Tokens - 碳青微紫（Carbon Cyan + Subtle Purple）---------- */
:root {
  /* Colors */
  --bg-0: #0a0d18;
  --bg-1: #13172a;
  --bg-2: #1a1f38;
  --bg-3: #0d1020;
  --border: rgba(125, 211, 252, 0.12);
  --border-strong: rgba(125, 211, 252, 0.25);
  --border-glow: rgba(99, 102, 241, 0.5);

  --text-1: #f1f5f9;
  --text-2: #cbd5e1;
  --text-3: #94a3b8;

  --primary: #06b6d4;
  --primary-2: #6366f1;
  --accent: #67e8f9;
  --success: #34d399;
  --warning: #fbbf24;

  --grad-1: linear-gradient(135deg, #0891b2 0%, #06b6d4 40%, #6366f1 100%);
  --grad-2: linear-gradient(135deg, #0891b2 0%, #6366f1 100%);
  --grad-text: linear-gradient(135deg, #67e8f9 0%, #22d3ee 25%, #818cf8 55%, #a78bfa 85%, #c4b5fd 100%);
  --grad-radial: radial-gradient(circle at 50% 0%, rgba(34, 211, 238, 0.20), transparent 60%);

  /* Layout */
  --container: 1440px;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.2s;
  --t: 0.4s;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
               'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans CN',
               'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-0);
  color: var(--text-1);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "tnum";
  overflow-x: hidden;
  min-height: 100vh;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: none; background: none; color: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

/* ---------- Background Layer - 碳青微紫 ---------- */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    /* 对角青色光带 */
    linear-gradient(135deg, transparent 0%, transparent 40%, rgba(34,211,238,0.18) 50%, transparent 60%, transparent 100%),
    /* 右上角青色光团 */
    radial-gradient(ellipse at 80% 10%, rgba(14,165,233,0.30), transparent 50%),
    /* 左下角紫色光团（微紫的关键）*/
    radial-gradient(ellipse at 20% 90%, rgba(99,102,241,0.22), transparent 50%),
    #0a0d18;
}

.bg-decor::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(125,211,252,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,211,252,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(180deg, black 50%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, black 50%, transparent 100%);
}

#particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section--sm { padding: 88px 0; }

.section-head {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 72px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: rgba(99, 102, 241, 0.08);
  border-radius: 999px;
  font-size: 14px;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}

.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px var(--primary);
}

.section-title {
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-2);
  line-height: 1.75;
}

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

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--t) var(--ease),
              border-color var(--t) var(--ease), padding var(--t) var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  background: rgba(10, 10, 18, 0.75);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom-color: var(--border);
  padding: 12px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--grad-1);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 15px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  list-style: none;
}

/* 兼容两种结构：
   静态版： <a class="nav-link">
   WordPress wp_nav_menu： <li><a></a></li>
*/
.nav-link,
.nav-links li a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-2);
  border-radius: 8px;
  text-decoration: none;
  transition: color var(--t-fast), background var(--t-fast);
}

.nav-link:hover,
.nav-link.is-active,
.nav-links li a:hover,
.nav-links li.current-menu-item a,
.nav-links li.current_page_item a {
  color: var(--text-1);
  background: rgba(255, 255, 255, 0.05);
}

.nav-links li.current-menu-item a,
.nav-links li.current_page_item a {
  background: rgba(99, 102, 241, 0.1);
}

.nav-cta {
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 500;
  background: var(--grad-1);
  border-radius: 999px;
  color: #fff;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  position: relative;
  width: 20px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform var(--t-fast);
}

.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

.nav.is-open .nav-toggle span { background: transparent; }
.nav.is-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast),
              background var(--t-fast), border-color var(--t-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--grad-1);
  color: #fff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(99, 102, 241, 0.5);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-strong);
  color: var(--text-1);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-glow);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 16px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 100px 0;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero--compact {
  min-height: auto;
  padding: 160px 0 80px;
  align-items: flex-start;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 999px;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 28px;
  animation: fadeUp 0.8s var(--ease) both;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(36px, 4.5vw, 56px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
  animation: fadeUp 0.8s var(--ease) 0.1s both;
}

.hero-subtitle {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.75;
  color: var(--text-2);
  max-width: 720px;
  margin: 0 auto 44px;
  animation: fadeUp 0.8s var(--ease) 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 0.8s var(--ease) 0.3s both;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: fadeUp 1s var(--ease) 0.6s both;
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--text-3));
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- Stats ---------- */
/* ---------- Feature Cards ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  padding: 36px 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--t) var(--ease),
              border-color var(--t) var(--ease),
              background var(--t) var(--ease);
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px circle at var(--mx, 50%) var(--my, 50%),
    rgba(99, 102, 241, 0.08),
    transparent 40%
  );
  opacity: 0;
  transition: opacity var(--t) var(--ease);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  background: var(--bg-2);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(59, 130, 246, 0.10));
  border: 1px solid rgba(99, 102, 241, 0.2);
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  position: relative;
  color: var(--primary);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.card-text {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.75;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  font-size: 15px;
  color: var(--primary);
  font-weight: 500;
}

.card-link::after {
  content: '→';
  transition: transform var(--t-fast);
}

.card-link:hover::after { transform: translateX(4px); }

/* ---------- Clickable Card (整张可点击) ---------- */
.card.card--clickable {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.card.card--clickable:hover {
  border-color: var(--border-glow);
}

.card-arrow {
  position: absolute;
  bottom: 24px;
  right: 28px;
  font-size: 22px;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity var(--t) var(--ease), transform var(--t) var(--ease);
  pointer-events: none;
}

.card.card--clickable:hover .card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- Product Showcase ---------- */
.section--products { padding: 72px 0; }

.product-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 90px;
}

.product-row:first-child { padding-top: 0; }
.product-row:last-child { padding-bottom: 0; border-bottom: none; }

.product-row--reverse .product-visual { order: 2; }
.product-row--reverse .product-info { order: 1; }

.product-info-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.product-info-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.product-info-title a {
  color: inherit;
  transition: color var(--t-fast);
}

.product-info-title a:hover {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.product-info-text {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 24px;
}

.product-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.product-keyword {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(34, 211, 238, 0.07);
  border: 1px solid rgba(125, 211, 252, 0.22);
  border-radius: 999px;
}

.product-features {
  list-style: none;
  margin-bottom: 28px;
}

.product-extra {
  margin-bottom: 24px;
}

.product-extra-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.product-scenarios {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-scenario {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(99, 102, 241, 0.04);
  border: 1px solid rgba(99, 102, 241, 0.12);
  border-radius: var(--radius-md);
  font-size: 15px;
  line-height: 1.65;
}

.product-scenario-tag {
  flex-shrink: 0;
  font-weight: 600;
  color: var(--text-1);
}

.product-scenario-tag::after {
  content: '：';
  color: var(--text-3);
  font-weight: 400;
}

.product-scenario-text {
  color: var(--text-2);
}

.product-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-1);
}

.product-features li::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--grad-1);
  position: relative;
  background-image:
    linear-gradient(135deg, #6366f1, #8b5cf6),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'><path d='M2 5l2 2 4-4' stroke='white' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-blend-mode: normal;
}

.product-features li span::before {
  content: '✓';
  color: #fff;
  font-weight: 700;
}

.product-visual {
  position: relative;
  aspect-ratio: 5 / 4;
  display: grid;
  place-items: center;
}

.product-visual::before {
  content: '';
  position: absolute;
  inset: -10%;
  background: var(--grad-radial);
  opacity: 0.7;
  z-index: 0;
}

.product-visual-img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.product-visual--link {
  cursor: pointer;
}

.product-visual--link:hover .product-visual-img {
  transform: translateY(-6px);
  box-shadow: 0 32px 80px rgba(34, 211, 238, 0.25), 0 24px 70px rgba(0, 0, 0, 0.55);
}

.product-visual-hint {
  position: absolute;
  z-index: 2;
  bottom: 14px;
  left: 50%;
  transform: translate(-50%, 8px);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: rgba(10, 13, 24, 0.82);
  border: 1px solid rgba(125, 211, 252, 0.3);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast), transform var(--t-fast);
}

.product-visual--link:hover .product-visual-hint {
  opacity: 1;
  transform: translate(-50%, 0);
}

.btn-arrow {
  display: inline-block;
  transition: transform var(--t-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ---------- Capability Block (About page) ---------- */
.capability-block {
  padding: 36px 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.capability-block:hover {
  border-color: var(--border-strong);
  background: var(--bg-2);
}

.capability-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md, 12px);
  background: var(--grad-1);
  display: grid;
  place-items: center;
  color: #fff;
  margin-bottom: 18px;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}

.capability-icon svg { width: 22px; height: 22px; }

.capability-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 18px;
}

.capability-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.capability-list li {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-2);
}

.capability-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* ---------- Value Propositions (Home, unified panel with gradient text titles) ---------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 64px 48px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.value-grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-radial);
  opacity: 0.6;
  pointer-events: none;
}

/* 顶部一条细微的青紫高光描边，呼应 hero 整体氛围 */
.value-grid::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(34, 211, 238, 0.5) 20%,
    rgba(167, 139, 250, 0.5) 80%,
    transparent 100%);
  pointer-events: none;
}

.value-card {
  position: relative;
  text-align: center;
  background: transparent;
  border: none;
  padding: 0;
}

/* 图标降为小型辅助装饰，跟 .card-icon 同款方形圆角 */
.value-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 22px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(34, 211, 238, 0.10));
  border: 1px solid rgba(99, 102, 241, 0.25);
  display: grid;
  place-items: center;
  color: var(--accent);
}

.value-icon svg { width: 20px; height: 20px; }

/* 主标题用 grad-text 渐变 + 大字号，跟原数字版同等视觉权重 */
.value-title {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  /* fallback color in case background-clip not supported */
  color: var(--accent);
}

.value-text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
}

@media (max-width: 960px) {
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 48px 32px;
    padding: 56px 36px;
  }
}

@media (max-width: 600px) {
  .value-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 48px 28px;
  }
}

/* ---------- Tech Highlight Grid ---------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-card {
  position: relative;
  padding: 36px 32px 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), background var(--t) var(--ease);
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.06), transparent 50%);
  opacity: 0;
  transition: opacity var(--t) var(--ease);
  pointer-events: none;
}

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

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

.tech-card-num {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.25;
}

.tech-card-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 14px;
  position: relative;
  padding-right: 64px;
}

.tech-card-text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  position: relative;
}

@media (max-width: 960px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .tech-grid { grid-template-columns: 1fr; }
}

/* ---------- FAQ Block ---------- */
.faq {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  padding: 28px 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

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

.faq-q {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
  line-height: 1.5;
}

.faq-a {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.8;
}

/* ---------- Comparison Table (Traditional vs Ours) ---------- */
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.comp-col {
  padding: 36px 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
}

.comp-col.comp-ours {
  border-color: var(--border-glow);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(6, 182, 212, 0.04));
}

.comp-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.comp-traditional .comp-tag {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-3);
}

.comp-ours .comp-tag {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent);
}

.comp-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 20px;
  line-height: 1.3;
}

.comp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.comp-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
}

.comp-traditional .comp-list li::before {
  content: '×';
  position: absolute;
  left: 0;
  top: 0;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  color: var(--text-3);
  font-weight: 700;
}

.comp-ours .comp-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-weight: 700;
  text-shadow: 0 0 8px var(--accent);
}

@media (max-width: 768px) {
  .comparison { grid-template-columns: 1fr; }
}

/* ---------- Architecture Image (Home page, SVG diagram) ---------- */
.arch-image {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.arch-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(34, 211, 238, 0.5) 30%,
    rgba(167, 139, 250, 0.5) 70%,
    transparent 100%);
}

.arch-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
}

@media (max-width: 768px) {
  .arch-image { padding: 12px; }
}

/* ---------- Architecture Stack (vertical layers) ---------- */
.arch-stack {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.arch-layer {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 28px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.arch-layer:first-child {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.arch-layer:last-child {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.arch-layer:hover {
  border-color: var(--border-glow);
  background: var(--bg-2);
}

.arch-layer--top {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(6, 182, 212, 0.05));
}

.arch-layer--bottom {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.05), rgba(99, 102, 241, 0.08));
}

.arch-label {
  flex-shrink: 0;
  width: 80px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.arch-text {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.6;
}

@media (max-width: 600px) {
  .arch-layer {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .arch-label { width: auto; }
}

/* ---------- Logo Wall ---------- */
.logo-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.logo-item {
  background: var(--bg-1);
  padding: 32px 20px;
  display: grid;
  place-items: center;
  color: var(--text-3);
  font-size: 15px;
  font-weight: 500;
  transition: color var(--t-fast), background var(--t-fast);
}

.logo-item:hover {
  background: var(--bg-2);
  color: var(--text-1);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--primary-2), var(--accent));
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.timeline-year {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-text {
  color: var(--text-2);
  line-height: 1.7;
}

/* ---------- CTA Section ---------- */
.cta-banner {
  position: relative;
  padding: 80px 64px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(59, 130, 246, 0.10));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  text-align: center;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 0%, rgba(99, 102, 241, 0.25), transparent 60%),
              radial-gradient(circle at 70% 100%, rgba(6, 182, 212, 0.2), transparent 60%);
}

.cta-banner > * { position: relative; }

.cta-banner h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 17px;
  color: var(--text-2);
  margin-bottom: 32px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .hero-actions { justify-content: center; }

/* ---------- Contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--t-fast), background var(--t-fast);
}

.contact-info-item:hover {
  border-color: var(--border-glow);
  background: var(--bg-2);
}

.contact-info-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(59, 130, 246, 0.10));
  display: grid;
  place-items: center;
  color: var(--primary);
}

.contact-info-icon svg { width: 20px; height: 20px; }

.contact-info-label {
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}

.contact-info-value {
  font-size: 16px;
  color: var(--text-1);
  font-weight: 500;
}

.form {
  padding: 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-size: 15px;
  transition: border-color var(--t-fast), background var(--t-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-3);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
  font-family: inherit;
}

.form-submit {
  width: 100%;
  margin-top: 8px;
}

/* ---------- Footer ---------- */
.footer {
  position: relative;
  margin-top: 120px;
  padding: 80px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .brand { margin-bottom: 16px; }

.footer-tagline {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-3);
  transition: color var(--t-fast);
}

.footer-col a:hover { color: var(--text-1); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  font-size: 13px;
  color: var(--text-3);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-icp a {
  color: var(--text-3);
  transition: color var(--t-fast);
}

.footer-icp a:hover { color: var(--text-2); }

/* ---------- Page Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .product-row { grid-template-columns: 1fr; gap: 40px; }
  .product-row--reverse .product-visual,
  .product-row--reverse .product-info { order: initial; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .section-head { margin-bottom: 48px; }

  .nav-inner { gap: 12px; }
  .brand { font-size: 16px; }
  .brand-logo { width: 28px; height: 28px; font-size: 13px; }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }

  /* 菜单打开时移除毛玻璃：backdrop-filter 会让 .nav 成为 fixed 子元素的包含块，
     导致下拉菜单与按钮错位（滚动后 .is-scrolled 加了 backdrop-filter 才触发）*/
  .nav.is-open,
  .nav.is-open.is-scrolled {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: rgba(10, 13, 24, 0.98);
    border-bottom-color: transparent;
  }

  /* 菜单打开时，把"免费咨询"按钮固定到菜单底部 */
  .nav.is-open .nav-cta {
    display: block;
    position: fixed;
    left: 20px;
    right: 20px;
    bottom: 24px;
    z-index: 100;
    padding: 18px 20px;
    font-size: 17px;
    font-weight: 600;
    text-align: center;
    color: #fff;
    background: var(--grad-1);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
  }

  .nav-links.is-open {
    display: flex;
    position: fixed;
    inset: 64px 0 0;
    flex-direction: column;
    align-items: stretch;
    /* 不用 backdrop-filter：全屏毛玻璃在移动端开菜单时会卡顿，
       且背景本就接近不透明，模糊几乎不可见 */
    background:
      radial-gradient(ellipse at 80% 10%, rgba(14,165,233,0.16), transparent 55%),
      radial-gradient(ellipse at 20% 90%, rgba(99,102,241,0.16), transparent 55%),
      #0a0d18;
    padding: 24px 20px 40px;
    gap: 4px;
    overflow-y: auto;
  }

  .nav-links.is-open li {
    width: 100%;
  }

  .nav-links.is-open li a,
  .nav-links.is-open .nav-link {
    display: block;
    width: 100%;
    padding: 18px 20px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-1);
    border-radius: 14px;
    border: 1px solid transparent;
    background: rgba(255, 255, 255, 0.02);
    text-align: left;
  }

  .nav-links.is-open li.current-menu-item a,
  .nav-links.is-open li.current_page_item a,
  .nav-links.is-open .nav-link.is-active {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.18), rgba(99, 102, 241, 0.18));
    border-color: rgba(125, 211, 252, 0.25);
    color: var(--text-1);
  }

  /* 给菜单内容腾出底部空间，避免被固定的 CTA 按钮遮挡 */
  .nav-links.is-open { padding-bottom: 100px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); padding: 40px 24px; gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 32px; }

  /* 手机上隐藏纯装饰的产品配图：放在文字下方显得拖沓 */
  .product-visual { display: none; }
  .product-row { gap: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-banner { padding: 48px 24px; }
  .hero { padding: 140px 0 80px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  /* 手机上隐藏滚动提示：内容更高会和按钮重叠，且触屏不需要 */
  .hero-scroll { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 64px 0; }
  .section--sm { padding: 48px 0; }
  .section-head { margin-bottom: 36px; }
  .hero { padding: 120px 0 60px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}