/* ============================================================
   TimesAI Agent 官网样式
   品牌色：海军蓝 #0B2B60、青绿 #139DA0、亮薄荷 #2BD88F
   ============================================================ */

:root {
  --navy: #0B2B60;
  --navy-deep: #071a3d;
  --navy-light: #1a3d7a;
  --teal: #139DA0;
  --mint: #2BD88F;
  --mint-light: #e8faf2;
  --gray-50: #f7f8fa;
  --gray-100: #eef0f4;
  --gray-200: #dde1e8;
  --gray-300: #c4cad5;
  --gray-500: #7a8394;
  --gray-600: #5a6373;
  --gray-700: #3d4553;
  --gray-900: #1a1f2b;
  --border: #e4e7ed;
  --border-dark: #2a3f66;
  --danger: #e5484d;
  --danger-light: #fef1f2;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC",
    "WenQuanYi Micro Hei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Cascadia Code",
    "Source Code Pro", Menlo, Consolas, monospace;

  --container: 1200px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(11, 43, 96, 0.06);
  --shadow-md: 0 4px 16px rgba(11, 43, 96, 0.08);
  --shadow-lg: 0 12px 40px rgba(11, 43, 96, 0.12);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-700);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* Layout */
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }
.section { padding: 120px 0; position: relative; }
.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin-bottom: 16px;
}
.section-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--navy);
  letter-spacing: -0.01em;
}
.section-title.light { color: #fff; }
.section-subtitle {
  font-size: 17px;
  color: var(--gray-600);
  margin-top: 16px;
  max-width: 640px;
  line-height: 1.7;
}
.section-subtitle.light { color: rgba(255,255,255,0.72); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--navy);
  color: #fff;
}
.btn-primary:hover { background: var(--navy-deep); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-mint {
  background: var(--mint);
  color: var(--navy-deep);
}
.btn-mint:hover { background: #23c47f; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 1.5px solid var(--navy);
  padding: 12.5px 28px;
}
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.4);
  padding: 12.5px 28px;
}
.btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.btn-ghost {
  background: rgba(255,255,255,0.08);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
}
.btn-ghost:hover { background: rgba(255,255,255,0.15); }

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}
.nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(255,255,255,0.95);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { height: 48px; display: flex; align-items: center; }
.nav-logo img { height: 44px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--navy); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-cta .btn { padding: 10px 20px; font-size: 14px; }
.nav-phone {
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; }
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  position: relative;
  transition: all 0.3s;
}
.nav-toggle span::before { content: ''; position: absolute; top: -7px; left: 0; }
.nav-toggle span::after { content: ''; position: absolute; top: 7px; left: 0; }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 20px 32px 32px;
  z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}
.mobile-menu .btn { width: 100%; margin-top: 16px; }

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(180deg, #f5f7fb 0%, #fff 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(19,157,160,0.08) 0%, transparent 60%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(43,216,143,0.06) 0%, transparent 60%);
  border-radius: 50%;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(19,157,160,0.1);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 24px;
}
.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--mint);
  border-radius: 50%;
}
.hero h1 {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero h1 .accent {
  background: linear-gradient(135deg, var(--teal) 0%, var(--mint) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-desc strong { color: var(--navy); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; margin-bottom: 40px; flex-wrap: wrap; }
.hero-phone-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--gray-600);
}
.hero-phone-inline strong { color: var(--navy); font-weight: 700; font-size: 17px; }

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.hero-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--gray-600);
}
.hero-feature svg { flex-shrink: 0; color: var(--mint); }

/* Hero Product Mock */
.hero-visual { position: relative; }
.browser-frame {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(11,43,96,0.15);
  overflow: hidden;
  border: 1px solid var(--border);
}
.browser-bar {
  height: 36px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 6px;
}
.browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #e0e3e8;
}
.browser-dot:nth-child(1) { background: #ff5f57; }
.browser-dot:nth-child(2) { background: #ffbd2e; }
.browser-dot:nth-child(3) { background: #28c940; }
.browser-url {
  flex: 1;
  margin-left: 12px;
  height: 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-size: 11px;
  color: var(--gray-500);
}
.browser-content { padding: 0; }
.browser-content img { width: 100%; height: auto; }
.browser-caption {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy);
  color: rgba(255,255,255,0.8);
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 100px;
  white-space: nowrap;
}

/* Trust Bar */
.trust-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 80px;
}
.trust-item {
  background: #fff;
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.trust-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(19,157,160,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  flex-shrink: 0;
}
.trust-text strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 2px;
}
.trust-text span {
  font-size: 13px;
  color: var(--gray-500);
}

/* ============================================================
   Data Impact Band (Dark)
   ============================================================ */
.data-band {
  background: var(--navy);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.data-band::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    linear-gradient(90deg, rgba(19,157,160,0.08) 1px, transparent 1px),
    linear-gradient(rgba(19,157,160,0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.data-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}
.data-stat {
  text-align: center;
}
.data-number {
  font-family: var(--font-mono);
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.data-number .mint { color: var(--mint); }
.data-number .unit {
  font-size: 24px;
  font-weight: 500;
  margin-left: 2px;
}
.data-label {
  font-size: 15px;
  color: rgba(255,255,255,0.65);
  line-height: 1.6;
}

/* ============================================================
   Scenario Narrative (Sticky Scroll)
   ============================================================ */
.scenario { padding: 120px 0; }
.scenario-header { text-align: center; margin-bottom: 80px; }
.scenario-header .section-title { max-width: 700px; margin: 0 auto; }
.scenario-header .section-subtitle { margin: 16px auto 0; }

.scenario-tabs {
  display: inline-flex;
  background: var(--gray-100);
  border-radius: 100px;
  padding: 4px;
  margin-bottom: 32px;
  gap: 4px;
}
.scenario-tab {
  padding: 10px 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-600);
  border-radius: 100px;
  transition: all 0.25s ease;
}
.scenario-tab.active {
  background: #fff;
  color: var(--navy);
  box-shadow: var(--shadow-sm);
}

.scenario-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.scenario-steps { position: relative; }
.scenario-step {
  padding: 36px 0;
  border-left: 2px solid var(--gray-200);
  padding-left: 36px;
  margin-left: 12px;
  position: relative;
  opacity: 0.4;
  transition: all 0.4s ease;
}
.scenario-step.active { opacity: 1; }
.scenario-step::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 44px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--gray-300);
  transition: all 0.3s ease;
}
.scenario-step.active::before {
  border-color: var(--teal);
  background: var(--teal);
  box-shadow: 0 0 0 6px rgba(19,157,160,0.15);
}
.scenario-step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.scenario-step h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}
.scenario-step p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 12px;
}
.scenario-step ul { margin-top: 8px; }
.scenario-step li {
  font-size: 14px;
  color: var(--gray-600);
  padding: 6px 0 6px 24px;
  position: relative;
  line-height: 1.6;
}
.scenario-step li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 14px;
  height: 2px;
  background: var(--teal);
  border-radius: 1px;
}
.scenario-step .highlight {
  display: inline-block;
  padding: 2px 8px;
  background: var(--mint-light);
  color: #0a8a5a;
  border-radius: 4px;
  font-weight: 600;
  font-size: 14px;
}

.scenario-visual {
  position: sticky;
  top: 100px;
}
.scenario-screens { position: relative; }
.scenario-screen {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
  pointer-events: none;
}
.scenario-screen.active {
  opacity: 1;
  transform: translateY(0);
  position: relative;
  pointer-events: auto;
}

/* ============================================================
   Digital Employee Profile (Tabs)
   ============================================================ */
.profiles {
  background: var(--gray-50);
  padding: 120px 0;
}
.profiles-header { text-align: center; margin-bottom: 56px; }
.profiles-header .section-title { margin-bottom: 12px; }

.profile-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}
.profile-tab {
  padding: 24px 28px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
  width: 100%;
}
.profile-tab:hover { border-color: var(--gray-300); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.profile-tab.active {
  border-color: var(--navy);
  background: var(--navy);
  color: #fff;
}
.profile-tab-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(19,157,160,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  margin-bottom: 16px;
  transition: all 0.3s ease;
}
.profile-tab.active .profile-tab-icon {
  background: rgba(43,216,143,0.2);
  color: var(--mint);
}
.profile-tab-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--navy);
  transition: color 0.3s;
}
.profile-tab.active .profile-tab-title { color: #fff; }
.profile-tab-sub {
  font-size: 13px;
  color: var(--gray-500);
  transition: color 0.3s;
}
.profile-tab.active .profile-tab-sub { color: rgba(255,255,255,0.6); }

.profile-content {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 56px;
  box-shadow: var(--shadow-sm);
  display: none;
}
.profile-content.active { display: block; animation: fadeUp 0.4s ease; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.profile-info h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}
.profile-role {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(19,157,160,0.1);
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 24px;
}
.profile-desc {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 28px;
}
.profile-duties h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.profile-duties ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.profile-duties li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--gray-700);
}
.profile-duties li svg { color: var(--mint); flex-shrink: 0; }

.profile-metrics {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 32px;
}
.profile-metrics h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}
.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px dashed var(--border);
}
.metric-row:last-child { border-bottom: none; }
.metric-label {
  font-size: 14px;
  color: var(--gray-600);
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--mint);
}
.metric-value .unit {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  margin-left: 2px;
}

.profile-beneficiary {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--gray-600);
}
.profile-beneficiary strong { color: var(--navy); }

/* Boundary Line */
.boundary-line {
  margin-top: 48px;
  padding: 24px 32px;
  background: var(--danger-light);
  border-left: 4px solid var(--danger);
  border-radius: 0 var(--radius) var(--radius) 0;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.boundary-line svg {
  color: var(--danger);
  flex-shrink: 0;
  margin-top: 2px;
}
.boundary-line p {
  font-size: 14px;
  color: #7a2828;
  line-height: 1.7;
}
.boundary-line strong { color: #8b1d1d; font-weight: 700; }

/* ============================================================
   ROI Calculator
   ============================================================ */
.roi { padding: 120px 0; }
.roi-header { margin-bottom: 56px; }
.roi-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 48px;
}
.roi-controls {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.roi-controls h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 28px;
}
.roi-field { margin-bottom: 28px; }
.roi-field-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}
.roi-field-label label {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
}
.roi-field-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
}
.roi-field-value .unit {
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-500);
  margin-left: 2px;
}

/* Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--gray-200);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--navy);
  cursor: pointer;
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(11,43,96,0.3);
  transition: transform 0.2s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--navy);
  cursor: pointer;
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(11,43,96,0.3);
}

.roi-results {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.roi-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}
.roi-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.roi-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.roi-card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.roi-card-icon.revenue { background: rgba(43,216,143,0.15); color: var(--mint); }
.roi-card-icon.cost { background: rgba(19,157,160,0.15); color: var(--teal); }
.roi-card-icon.risk { background: rgba(11,43,96,0.1); color: var(--navy); }
.roi-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
}
.roi-big-number {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
  margin-bottom: 8px;
}
.roi-big-number.mint { color: var(--mint); }
.roi-big-number .unit {
  font-size: 18px;
  font-weight: 500;
  color: var(--gray-500);
  margin-left: 4px;
}
.roi-range {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 16px;
}
.roi-details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-100);
}
.roi-detail-item { text-align: center; }
.roi-detail-item .num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--teal);
}
.roi-detail-item .lbl {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 4px;
  line-height: 1.4;
}

.roi-disclaimer {
  font-size: 12px;
  color: var(--gray-500);
  text-align: center;
  padding: 16px;
  line-height: 1.6;
}

/* ============================================================
   Security & Compliance
   ============================================================ */
.security {
  background: var(--gray-50);
  padding: 120px 0;
}
.security-header { text-align: center; margin-bottom: 64px; }
.security-header .section-title { margin-bottom: 12px; }

.security-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.security-item {
  background: #fff;
  padding: 44px 48px;
}
.security-item-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(11,43,96,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  margin-bottom: 24px;
}
.security-item h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}
.security-item ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.security-item li {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
}
.security-item li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 2px;
  background: var(--teal);
  border-radius: 1px;
}

/* ============================================================
   Case Study
   ============================================================ */
.case { padding: 120px 0; }
.case-header { margin-bottom: 56px; }
.case-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: start;
}
.case-main {
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: 56px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.case-main::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(19,157,160,0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(43,216,143,0.2);
  color: var(--mint);
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 16px;
  position: relative;
}
.case-main h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  position: relative;
}
.case-sub {
  font-size: 15px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 32px;
  position: relative;
}
.case-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 36px;
  position: relative;
}
.case-stat {
  padding: 20px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
}
.case-stat .num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--mint);
  line-height: 1.1;
  margin-bottom: 6px;
}
.case-stat .lbl {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
}
.case-scenes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  position: relative;
}
.case-scene-tag {
  padding: 6px 14px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  font-size: 13px;
  color: rgba(255,255,255,0.8);
}
.case-demo-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  position: relative;
}
.demo-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}
.demo-btn:hover { background: rgba(255,255,255,0.2); }
.demo-btn svg { color: var(--mint); }
.demo-duration {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-left: auto;
}

.case-sidebar { display: flex; flex-direction: column; gap: 24px; }
.case-sidebar-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.case-sidebar-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.case-sidebar-card h4 svg { color: var(--teal); }
.dept-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.dept-tag {
  padding: 8px 14px;
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--gray-700);
  transition: all 0.2s;
}
.dept-tag:hover { border-color: var(--teal); color: var(--teal); }

/* ============================================================
   Process Timeline
   ============================================================ */
.process {
  background: var(--gray-50);
  padding: 120px 0;
}
.process-header { text-align: center; margin-bottom: 64px; }
.process-header .section-title { margin-bottom: 12px; }

.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-bottom: 72px;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(12.5% - 1px);
  right: calc(12.5% - 1px);
  height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--mint));
  z-index: 0;
}
.timeline-item {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 20px;
}
.timeline-dot {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  box-shadow: var(--shadow-sm);
}
.timeline-item h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.timeline-item .time {
  font-size: 13px;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 12px;
}
.timeline-item p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
}

.pricing-block {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}
.pricing-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 32px;
  text-align: center;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pricing-item {
  padding: 28px;
  background: var(--gray-50);
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border);
}
.pricing-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(19,157,160,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  margin: 0 auto 16px;
}
.pricing-item h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.pricing-item p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.7;
}

.commitment-bar {
  margin-top: 32px;
  padding: 24px 32px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  border-radius: var(--radius);
  color: #fff;
  display: flex;
  flex-wrap: wrap;
  gap: 24px 48px;
  justify-content: center;
  align-items: center;
}
.commitment-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}
.commitment-item svg { color: var(--mint); }

.tech-req {
  margin-top: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.tech-req summary {
  padding: 18px 24px;
  background: #fff;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.tech-req summary::-webkit-details-marker { display: none; }
.tech-req summary::after {
  content: '+';
  font-size: 20px;
  color: var(--gray-500);
  transition: transform 0.2s;
}
.tech-req[open] summary::after { transform: rotate(45deg); }
.tech-req-content {
  padding: 24px;
  background: var(--gray-50);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 32px;
}
.tech-req-item h5 {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.tech-req-item p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.7;
  font-family: var(--font-mono);
}

/* ============================================================
   About
   ============================================================ */
.about { padding: 120px 0; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: center;
}
.about-label { font-size: 13px; font-weight: 600; color: var(--teal); letter-spacing: 0.08em; margin-bottom: 16px; }
.about h2 {
  font-size: 40px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 24px;
}
.about p {
  font-size: 16px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 16px;
}
.about-tagline {
  margin-top: 32px;
  padding: 24px 28px;
  border-left: 4px solid var(--teal);
  background: var(--gray-50);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--navy);
  line-height: 1.6;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.about-stat {
  padding: 28px;
  background: var(--gray-50);
  border-radius: var(--radius);
  text-align: center;
}
.about-stat .num {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
  margin-bottom: 6px;
}
.about-stat .lbl {
  font-size: 13px;
  color: var(--gray-500);
}
.about-domains {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.domain-tag {
  padding: 10px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 14px;
  color: var(--gray-700);
  font-weight: 500;
}
.domain-tag strong { color: var(--navy); }

/* ============================================================
   Final CTA
   ============================================================ */
.final-cta {
  background: var(--navy-deep);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    linear-gradient(90deg, rgba(19,157,160,0.06) 1px, transparent 1px),
    linear-gradient(rgba(19,157,160,0.06) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at 70% 50%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 50%, #000 0%, transparent 70%);
}
.final-cta-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.final-cta-text h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
}
.final-cta-text p {
  font-size: 16px;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  margin-bottom: 32px;
}
.final-phone {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.final-phone .label {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.final-phone .number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: 0.01em;
}
.final-phone .contact {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

.wechat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  max-width: 360px;
  margin: 0 auto;
  box-shadow: 0 24px 60px rgba(0,0,0,0.3);
}
.wechat-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}
.wechat-qr-img {
  width: 200px;
  height: 200px;
  margin: 0 auto 16px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
}
.wechat-qr-img img { width: 100%; height: 100%; object-fit: contain; }
.wechat-card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--navy-deep);
  padding: 60px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { height: 48px; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--mint); }
.footer-bottom {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: inherit; text-decoration: none; transition: color 0.2s; }
.footer-bottom a:hover { color: rgba(255,255,255,0.75); }

/* ============================================================
   WeChat Modal
   ============================================================ */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(11,43,96,0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.modal-overlay.open {
  display: flex;
  opacity: 1;
}
.modal {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  max-width: 380px;
  width: 90%;
  position: relative;
  text-align: center;
  transform: scale(0.95);
  transition: transform 0.3s ease;
}
.modal-overlay.open .modal { transform: scale(1); }
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  transition: all 0.2s;
}
.modal-close:hover { background: var(--gray-100); color: var(--navy); }
.modal h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.modal-sub {
  font-size: 14px;
  color: var(--gray-600);
  margin-bottom: 24px;
}
.modal-qr {
  width: 200px;
  height: 200px;
  margin: 0 auto 16px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-qr img { width: 100%; height: 100%; object-fit: contain; }
.modal-tip {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 20px;
}
.modal-phone {
  padding: 14px;
  background: var(--gray-50);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: var(--gray-600);
}
.modal-phone strong {
  color: var(--navy);
  font-weight: 700;
  font-family: var(--font-mono);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq { padding: 120px 0; background: #fff; }
.faq-header { text-align: center; margin-bottom: 56px; }
.faq-header .section-title { margin-bottom: 12px; }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.2s;
}
.faq-item:hover { border-color: var(--gray-300); }
.faq-item[open] { border-color: var(--teal); box-shadow: var(--shadow-sm); }
.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  font-size: 22px;
  color: var(--gray-400, var(--gray-500));
  font-weight: 300;
  transition: transform 0.25s ease;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
  color: var(--teal);
}
.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.8;
}

/* ============================================================
   Scroll reveal animation
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .hero h1 { font-size: 42px; }
  .section-title { font-size: 32px; }
  .hero-grid { gap: 40px; }
  .scenario-container { gap: 48px; }
  .data-number { font-size: 44px; }
  .profile-content { padding: 40px; }
  .profile-grid { gap: 32px; }
  .roi-layout { grid-template-columns: 320px 1fr; gap: 32px; }
  .case-layout { grid-template-columns: 1fr; }
  .about-grid { gap: 48px; }
  .final-cta-inner { gap: 48px; }
  .security-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .section-title { font-size: 26px; }
  .section-subtitle { font-size: 15px; }

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

  .hero { padding: 120px 0 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

  .trust-bar { grid-template-columns: 1fr; margin-top: 48px; }
  .trust-item { padding: 20px 24px; }

  .data-band { padding: 56px 0; }
  .data-stats { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
  .data-number { font-size: 36px; }
  .data-number .unit { font-size: 18px; }
  .data-label { font-size: 13px; }

  .scenario { padding: 72px 0; }
  .scenario-header { margin-bottom: 48px; }
  .scenario-container { grid-template-columns: 1fr; gap: 32px; }
  .scenario-visual { position: static; }
  .scenario-step { padding: 24px 0 24px 28px; }
  .scenario-step h3 { font-size: 20px; }

  .profiles { padding: 72px 0; }
  .profile-tabs { grid-template-columns: 1fr; }
  .profile-content { padding: 28px; }
  .profile-grid { grid-template-columns: 1fr; gap: 28px; }

  .roi { padding: 72px 0; }
  .roi-layout { grid-template-columns: 1fr; }
  .roi-controls { padding: 28px; }
  .roi-big-number { font-size: 32px; }
  .roi-details { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .roi-detail-item .num { font-size: 18px; }

  .security { padding: 72px 0; }
  .security-header { margin-bottom: 40px; }
  .security-item { padding: 28px; }
  .security-item h3 { font-size: 18px; }

  .case { padding: 72px 0; }
  .case-main { padding: 32px; }
  .case-main h3 { font-size: 22px; }
  .case-stats { grid-template-columns: 1fr; }

  .process { padding: 72px 0; }
  .timeline { grid-template-columns: 1fr; gap: 32px; }
  .timeline::before { display: none; }
  .timeline-dot { margin-bottom: 16px; }
  .pricing-block { padding: 28px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .commitment-bar { padding: 20px; gap: 16px 24px; }
  .tech-req-content { grid-template-columns: 1fr; }

  .about { padding: 72px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about h2 { font-size: 28px; }
  .about-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .about-stat { padding: 16px 8px; }
  .about-stat .num { font-size: 26px; }
  .about-tagline { font-size: 16px; }

  .final-cta { padding: 64px 0; }
  .final-cta-inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .final-cta-text h2 { font-size: 26px; }
  .final-phone .number { font-size: 26px; }

  .footer { padding: 48px 0 24px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .faq { padding: 72px 0; }
}

@media (max-width: 375px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 28px; }
  .section-title { font-size: 24px; }
  .data-number { font-size: 30px; }
  .hero-features { gap: 16px; }
  .hero-feature { font-size: 13px; }
}