:root {
  --primary: #1B2E5E;       /* Logo 深蓝 */
  --primary-dark: #111d3e;  /* 深蓝加深 */
  --primary-light: #2a4080; /* 深蓝稍亮 */
  --gold: #C9A84C;          /* Logo 金色 */
  --gold-light: #e8c96a;    /* 金色高亮 */
  --accent: #C9A84C;        /* CTA 用金色 */
  --dark: #1a1a2e;
  --light: #f5f7fc;
  --white: #ffffff;
  --gray: #6b7280;
  --border: rgba(27, 46, 94, 0.14);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 26px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 14px 46px rgba(0, 0, 0, 0.14);
}
 
* {
  box-sizing: border-box;
}
 
body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.header {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

nav,
.header > .container > nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.nav-links,
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.language-selector {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--light);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s ease;
  border: 1px solid rgba(0, 0, 0, 0.06);
  color: var(--dark);
}

.lang-btn:hover {
  background: rgba(31, 41, 55, 0.06);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  min-width: 160px;
  display: none;
  z-index: 1001;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.lang-dropdown.show {
  display: block;
}

.lang-option {
  padding: 10px 14px;
  cursor: pointer;
  transition: background 0.15s ease;
  font-size: 0.9rem;
}

.lang-option:hover {
  background: rgba(31, 41, 55, 0.06);
}

.lang-option.selected {
  background: rgba(0, 86, 179, 0.08);
  color: var(--primary);
  font-weight: 700;
}

.btn-login {
  background: var(--primary);
  color: white;
  padding: 8px 14px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: none;
}

.btn-login:hover {
  transform: translateY(-1px);
}
 
input,
select,
textarea,
button {
  font-family: inherit;
}
 
/* Typography */
.section-title {
  letter-spacing: -0.01em;
}
 
/* Unified cards */
.section,
.split-card,
.chat-preview-box,
.payment-card,
.waiting-card,
.confirmation-card,
.support-card {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
}
 
.section:hover,
.split-card:hover {
  box-shadow: var(--shadow-md);
}
 
/* Unified inputs */
.form-input,
.search-input,
.input-box,
.date-input,
.calc-compact select {
  border-radius: 12px !important;
  border: 1px solid var(--border) !important;
}
 
.form-input:focus,
.search-input:focus,
.input-box:focus,
.date-input:focus,
.calc-compact select:focus {
  outline: none;
  border-color: rgba(0, 86, 179, 0.55) !important;
  box-shadow: 0 0 0 4px rgba(0, 86, 179, 0.10) !important;
}
 
/* Unified buttons */
.btn-main,
.btn-login,
.btn-support,
.btn-book-main,
.btn-chat,
.btn-book,
.btn-send,
.btn-compact,
.modal-btn,
#payNowBtn,
#payBtn {
  border-radius: 12px !important;
}
 
.btn-main,
.btn-login,
.btn-support,
.btn-book-main,
.btn-chat,
.btn-book,
.btn-send,
.btn-compact,
.modal-btn,
#payNowBtn,
#payBtn {
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.10);
}
 
.btn-main:hover,
.btn-login:hover,
.btn-support:hover,
.btn-book-main:hover,
.btn-chat:hover,
.btn-book:hover,
.btn-send:hover,
.btn-compact:hover,
.modal-btn:hover,
#payNowBtn:hover,
#payBtn:hover {
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.14);
}
 
/* Reduce oversized vertical whitespace on home */
.steps,
.ai-chat-section,
.split-section,
.trust,
.calculator {
  padding-top: 56px !important;
  padding-bottom: 56px !important;
}
 
@media (max-width: 768px) {
  .steps,
  .ai-chat-section,
  .split-section,
  .trust,
  .calculator {
    padding-top: 44px !important;
    padding-bottom: 44px !important;
  }
}
 
/* Quick Actions polish */
.split-card {
  padding: 24px !important;
}
 
.card-icon {
  margin-bottom: 14px !important;
}
 
.card-content h3 {
  letter-spacing: -0.01em;
}
 
.cta-row {
  margin-top: 18px;
}

.jump-pills {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.jump-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.10);
  background: rgba(255, 255, 255, 0.85);
  color: rgba(31, 41, 55, 0.88);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.jump-pill:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 86, 179, 0.24);
}

.why-subtitle {
  text-align: center;
  color: var(--gray);
  max-width: 900px;
  margin: 0 auto 14px;
  line-height: 1.6;
}

.integrative-details-block {
  max-width: 900px;
  margin: 12px auto 0;
}

.integrative-details-block > summary {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  color: var(--primary);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0, 86, 179, 0.16);
  background: rgba(0, 86, 179, 0.06);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.integrative-details-block > summary::-webkit-details-marker {
  display: none;
}

.integrative-details-block > summary::after {
  content: "▾";
  font-weight: 800;
}

.integrative-details-block[open] > summary::after {
  content: "▴";
}

.integrative-details-block .integrative-callout {
  margin-top: 14px;
}

.date-range label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--dark);
  font-size: 0.95rem;
}

.integrative-callout {
  margin: 18px auto 18px;
  max-width: 900px;
  background: linear-gradient(135deg, rgba(0, 86, 179, 0.06) 0%, rgba(0, 200, 83, 0.06) 100%);
  border: 1px solid rgba(0, 86, 179, 0.12);
  border-radius: var(--radius-lg);
  padding: 18px 18px;
}

.integrative-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.integrative-text {
  color: var(--gray);
  font-size: 0.95rem;
  line-height: 1.6;
}

.integrative-note {
  margin-top: 10px;
  color: rgba(31, 41, 55, 0.72);
  font-size: 0.85rem;
}

.integrative-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.integrative-badge {
  border: 1px solid rgba(0, 86, 179, 0.14);
  background: rgba(255, 255, 255, 0.9);
  color: rgba(31, 41, 55, 0.86);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.integrative-details {
  margin-top: 14px;
}

.integrative-details > summary {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  color: var(--primary);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0, 86, 179, 0.16);
  background: rgba(0, 86, 179, 0.06);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.integrative-details > summary::-webkit-details-marker {
  display: none;
}

.integrative-details > summary::after {
  content: "▾";
  font-weight: 800;
}

.integrative-details[open] > summary::after {
  content: "▴";
}

.integrative-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.integrative-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(255, 255, 255, 0.92);
  padding: 14px 14px;
}

.integrative-card-title {
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 8px;
}

.integrative-list {
  margin: 0;
  padding-left: 18px;
  color: rgba(31, 41, 55, 0.82);
  font-size: 0.92rem;
  line-height: 1.6;
}

@media (max-width: 900px) {
  .integrative-grid {
    grid-template-columns: 1fr;
  }
}

.action-btn {
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: rgba(255, 255, 255, 0.92);
  color: var(--dark);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.action-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.14);
  border-color: rgba(0, 86, 179, 0.28);
}

.action-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Trust Badges */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  padding: 20px;
  background: linear-gradient(135deg, rgba(0, 200, 83, 0.05) 0%, rgba(0, 86, 179, 0.05) 100%);
  border-radius: 16px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.trust-badges span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.9);
  border: 1.5px solid rgba(0, 86, 179, 0.12);
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(31, 41, 55, 0.85);
  transition: all 0.3s ease;
}

.trust-badges span:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 86, 179, 0.15);
  border-color: rgba(0, 86, 179, 0.25);
  background: white;
}

@media (max-width: 768px) {
  .trust-badges {
    gap: 8px;
    padding: 16px;
  }

  .trust-badges span {
    font-size: 0.85rem;
    padding: 8px 12px;
  }
}