/* ============================================
   虾忙 Redesign — Design System
   editorial-japanese-print + soft-warm-white-deep-blue
   ============================================ */

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

:root {
  /* Colors */
  --c-primary: #014DB2;
  --c-primary-light: #E6EEF8;
  --c-bg: #F9F9F9;
  --c-white: #FFFFFF;
  --c-dark: #0A1628;
  --c-text: #0A1628;
  --c-text-gray: #6B7280;
  --c-border: #EAEAEA;
  --c-amber: #F59E0B;
  --c-amber-bg: #FEF3C7;
  --c-brick: #B91C1C;

  /* Typography */
  --font-serif: "Noto Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Inter", "SF Mono", monospace;

  /* Spacing */
  --max-width: 1200px;
  --header-height: 72px;
  --radius-card: 16px;
  --radius-chip: 999px;
  --shadow-card: 0 2px 8px rgba(1, 77, 178, 0.06);
  --shadow-hover: 0 4px 16px rgba(1, 77, 178, 0.10);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--c-white);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
}

.site-header .header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  gap: 48px;
}

.site-header .logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  color: var(--c-dark);
  flex-shrink: 0;
}

.site-header .logo svg {
  width: 28px;
  height: 28px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
}

.site-header nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-gray);
  transition: color 0.2s;
  position: relative;
}

.site-header nav a:hover {
  color: var(--c-dark);
}

.site-header nav a.active {
  color: var(--c-primary);
  font-weight: 600;
}

.site-header nav a.active::after {
  content: "";
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--c-primary);
  border-radius: 2px;
}

.site-header .header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.site-header .momo-btn {
  height: 36px;
  padding: 0 20px;
  background: var(--c-primary);
  color: var(--c-white);
  border: none;
  border-radius: var(--radius-chip);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.site-header .momo-btn:hover {
  opacity: 0.9;
}

.site-header .user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--c-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
}

/* --- Footer --- */
.site-footer {
  background: var(--c-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

.site-footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
}

.site-footer .footer-brand .logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.site-footer .footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer .footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 20px;
}

.site-footer .footer-col ul {
  list-style: none;
}

.site-footer .footer-col li {
  margin-bottom: 12px;
}

.site-footer .footer-col a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.2s;
}

.site-footer .footer-col a:hover {
  color: #FFFFFF;
}

.site-footer .footer-bottom {
  max-width: var(--max-width);
  margin: 64px auto 0;
  padding: 24px 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

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

.section {
  padding: 80px 0;
}

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 48px;
  line-height: 1.2;
  color: var(--c-dark);
  margin-bottom: 16px;
}

.section-title.large {
  font-size: 64px;
}

.section-title.xlarge {
  font-size: 80px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--c-text-gray);
  max-width: 600px;
  line-height: 1.8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border: none;
  border-radius: var(--radius-chip);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--c-primary);
  color: var(--c-white);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--c-dark);
  border: 1px solid var(--c-border);
}

.btn-outline:hover {
  border-color: var(--c-dark);
}

.btn-dark {
  background: var(--c-dark);
  color: var(--c-white);
}

.btn-dark:hover {
  opacity: 0.9;
}

.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 13px;
}

/* Cards */
.card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  padding: 32px;
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-hover);
}

.card-dark {
  background: var(--c-dark);
  color: var(--c-white);
  border-color: var(--c-dark);
}

.card-primary {
  background: var(--c-primary);
  color: var(--c-white);
  border-color: var(--c-primary);
}

/* Chips / Tags */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 16px;
  border-radius: var(--radius-chip);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--c-border);
  background: var(--c-white);
  color: var(--c-text);
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover {
  border-color: var(--c-dark);
}

.chip.active {
  background: var(--c-dark);
  color: var(--c-white);
  border-color: var(--c-dark);
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  background: var(--c-primary-light);
  color: var(--c-primary);
}

.tag-amber {
  background: var(--c-amber-bg);
  color: #92400E;
}

.tag-dark {
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.8);
}

/* Stat number */
.stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 32px;
  color: var(--c-dark);
}

.stat-label {
  font-size: 13px;
  color: var(--c-text-gray);
}

/* Dot indicators */
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.dot-blue { background: var(--c-primary); }
.dot-amber { background: var(--c-amber); }
.dot-green { background: #10B981; }
.dot-gray { background: #9CA3AF; }
.dot-brick { background: var(--c-brick); }

/* Note box */
.note-box {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.7;
}

.note-amber {
  background: var(--c-amber-bg);
  color: #92400E;
}

.note-blue {
  background: var(--c-primary-light);
  color: var(--c-primary);
}

/* Chat bubble */
.chat-bubble {
  max-width: 380px;
  padding: 14px 18px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
}

.chat-bubble.user {
  background: var(--c-primary);
  color: var(--c-white);
  border-radius: 16px 16px 4px 16px;
  margin-left: auto;
}

.chat-bubble.momo {
  background: var(--c-white);
  color: var(--c-text);
  border-radius: 16px 16px 16px 4px;
  border: 1px solid var(--c-border);
}

/* Divider */
.divider {
  height: 1px;
  background: var(--c-border);
  margin: 24px 0;
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --max-width: 100%;
  }
  
  .site-header .header-inner {
    padding: 0 24px;
    gap: 24px;
  }
  
  .site-header nav {
    gap: 20px;
  }
  
  .site-header nav a {
    font-size: 13px;
  }
  
  .container {
    padding: 0 24px;
  }
  
  .section-title.large { font-size: 48px; }
  .section-title.xlarge { font-size: 56px; }
  .section-title { font-size: 36px; }
  
  .site-footer .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 0 24px;
  }
}

@media (max-width: 768px) {
  .site-header nav { display: none; }
  .section { padding: 48px 0; }
  .section-title { font-size: 28px; }
  .site-footer .footer-inner { grid-template-columns: 1fr; }
}