/* ===== Resume Landing Page Styles ===== */
/* 继承主站配色体系，独立维护 */

:root {
  --r-primary: #007AFF;
  --r-secondary: #5AC8FA;
  --r-text: #1a1a1a;
  --r-text-muted: #6b7280;
  --r-bg: #f9f7f2;
  --r-card-bg: #ffffff;
  --r-navbar-bg: rgba(250, 235, 215, 0.82);
  --r-shadow: rgba(0, 0, 0, 0.08);
  --r-border: rgba(0, 0, 0, 0.06);
  --r-radius: 16px;
  --r-transition: 0.3s;
  --r-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  --r-font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --r-accent-glow: rgba(0, 122, 255, 0.12);
}

/* ---------- Dark Mode ---------- */
body.dark-mode {
  --r-text: #f1f5f9;
  --r-text-muted: #94a3b8;
  --r-bg: #003366;
  --r-card-bg: #004080;
  --r-navbar-bg: rgba(0, 51, 102, 0.85);
  --r-shadow: rgba(0, 0, 0, 0.35);
  --r-border: rgba(255, 255, 255, 0.08);
  --r-accent-glow: rgba(90, 200, 250, 0.15);
}

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

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

body {
  font-family: var(--r-font);
  background: var(--r-bg);
  color: var(--r-text);
  line-height: 1.6;
  transition: background var(--r-transition), color var(--r-transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ---------- Header / Navbar ---------- */
.r-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 2rem;
  background: var(--r-navbar-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--r-border);
  transition: background var(--r-transition);
}

.r-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--r-primary);
  font-weight: 800;
  font-size: 1.15rem;
  font-family: var(--r-font-mono);
  letter-spacing: 0.5px;
}

.r-logo-icon {
  width: 36px;
  height: 36px;
  border: 2.5px solid var(--r-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: var(--r-primary);
  transition: transform 0.3s ease;
}

.r-logo-icon:hover {
  transform: scale(1.08) rotate(3deg);
}

.r-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.r-btn {
  background: var(--r-card-bg);
  border: 1px solid var(--r-border);
  color: var(--r-text);
  font-size: 0.85rem;
  font-family: var(--r-font);
  cursor: pointer;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

.r-btn:hover {
  border-color: var(--r-primary);
  color: var(--r-primary);
}

.r-btn-home {
  background: var(--r-primary);
  color: #fff;
  border: none;
}

.r-btn-home:hover {
  opacity: 0.88;
  color: #fff;
}

/* ---------- Hero Section ---------- */
.r-hero {
  text-align: center;
  padding: 4rem 1.5rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.r-hero-terminal {
  display: inline-block;
  font-family: var(--r-font-mono);
  font-size: 0.82rem;
  color: var(--r-primary);
  background: var(--r-accent-glow);
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(0, 122, 255, 0.18);
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
}

body.dark-mode .r-hero-terminal {
  border-color: rgba(90, 200, 250, 0.25);
}

.r-hero h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--r-text);
  line-height: 1.3;
  margin-bottom: 1rem;
  transition: color var(--r-transition);
}

.r-hero h1 .r-highlight {
  color: var(--r-primary);
}

.r-hero-desc {
  font-size: 1.05rem;
  color: var(--r-text-muted);
  max-width: 560px;
  margin: 0 auto 1rem;
  line-height: 1.8;
  transition: color var(--r-transition);
}

/* ---------- Particle Canvas ---------- */
#r-particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
}

body.dark-mode #r-particle-canvas {
  opacity: 0.5;
}

/* ---------- Direction Cards Grid ---------- */
.r-cards-section {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.r-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.4rem;
}

/* ---------- Single Card ---------- */
.r-card {
  position: relative;
  background: var(--r-card-bg);
  border: 1px solid var(--r-border);
  border-radius: var(--r-radius);
  padding: 2rem 1.8rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  text-decoration: none;
  color: var(--r-text);
  transition: transform 0.35s cubic-bezier(.175,.885,.32,1.275),
              box-shadow 0.35s ease,
              border-color 0.3s ease;
  box-shadow: 0 4px 16px var(--r-shadow);
  overflow: hidden;
}

.r-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--r-radius) var(--r-radius) 0 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.r-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px var(--r-shadow);
  border-color: var(--r-primary);
}

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

.r-card:nth-child(1)::before { background: linear-gradient(90deg, #007AFF, #5AC8FA); }
.r-card:nth-child(2)::before { background: linear-gradient(90deg, #9c8cff, #d6d0ff); }
.r-card:nth-child(3)::before { background: linear-gradient(90deg, #34c759, #a7f3c1); }
.r-card:nth-child(4)::before { background: linear-gradient(90deg, #ff9500, #ffcc02); }

.r-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: #fff;
  flex-shrink: 0;
}

.r-card:nth-child(1) .r-card-icon { background: linear-gradient(135deg, #007AFF, #5AC8FA); }
.r-card:nth-child(2) .r-card-icon { background: linear-gradient(135deg, #9c8cff, #6f5de0); }
.r-card:nth-child(3) .r-card-icon { background: linear-gradient(135deg, #34c759, #30d158); }
.r-card:nth-child(4) .r-card-icon { background: linear-gradient(135deg, #ff9500, #ffcc02); }

.r-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--r-text);
  transition: color var(--r-transition);
}

.r-card-desc {
  font-size: 0.9rem;
  color: var(--r-text-muted);
  line-height: 1.65;
  flex: 1;
  transition: color var(--r-transition);
}

.r-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.r-card-tag {
  font-size: 0.75rem;
  font-family: var(--r-font-mono);
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--r-accent-glow);
  color: var(--r-primary);
  border: 1px solid rgba(0, 122, 255, 0.12);
  white-space: nowrap;
}

body.dark-mode .r-card-tag {
  background: rgba(90, 200, 250, 0.1);
  border-color: rgba(90, 200, 250, 0.2);
  color: var(--r-secondary);
}

.r-card-arrow {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--r-primary);
  margin-top: 0.5rem;
  transition: transform 0.25s ease;
}

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

.r-card-arrow i {
  font-size: 0.75rem;
  transition: transform 0.25s ease;
}

.r-card:hover .r-card-arrow i {
  transform: translateX(3px);
}

/* ---------- Card Entrance Animations ---------- */
.r-card {
  opacity: 0;
  transform: translateY(30px);
  animation: r-card-in 0.6s ease forwards;
}

.r-card:nth-child(1) { animation-delay: 0.1s; }
.r-card:nth-child(2) { animation-delay: 0.2s; }
.r-card:nth-child(3) { animation-delay: 0.3s; }
.r-card:nth-child(4) { animation-delay: 0.4s; }

@keyframes r-card-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Footer ---------- */
.r-footer {
  margin-top: auto;
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid var(--r-border);
  background: var(--r-navbar-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 0.85rem;
  color: var(--r-text-muted);
  transition: background var(--r-transition), color var(--r-transition);
}

.r-footer a {
  color: var(--r-primary);
  text-decoration: none;
}

.r-footer a:hover {
  text-decoration: underline;
}

.r-footer-motto {
  font-style: italic;
  font-weight: 600;
  color: var(--r-primary);
  margin-top: 0.6rem;
  font-size: 0.9rem;
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 768px) {
  .r-header {
    padding: 0.75rem 1rem;
  }

  .r-hero {
    padding: 3rem 1.2rem 1.5rem;
  }

  .r-hero h1 {
    font-size: 1.8rem;
  }

  .r-hero-desc {
    font-size: 0.95rem;
  }

  .r-cards-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .r-cards-section {
    padding: 0.5rem 1rem 3rem;
  }

  .r-card {
    padding: 1.5rem 1.4rem 1.3rem;
  }
}

/* Small phone */
@media (max-width: 420px) {
  html {
    font-size: 14px;
  }

  .r-header {
    padding: 0.6rem 0.8rem;
    gap: 0.3rem;
  }

  .r-logo span {
    display: none;
  }

  .r-btn {
    padding: 0.4rem 0.65rem;
    font-size: 0.8rem;
  }

  .r-hero {
    padding: 2rem 1rem 1rem;
  }

  .r-hero h1 {
    font-size: 1.5rem;
  }

  .r-card-tags {
    gap: 0.35rem;
  }

  .r-card-tag {
    font-size: 0.7rem;
    padding: 2px 7px;
  }
}

/* Large desktop */
@media (min-width: 1200px) {
  .r-hero h1 {
    font-size: 2.8rem;
  }

  .r-cards-grid {
    gap: 1.8rem;
  }
}

/* High-DPI / zoom-friendly */
@media (min-resolution: 1.5dppx) {
  .r-card {
    box-shadow: 0 3px 12px var(--r-shadow);
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .r-card {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .r-card:hover {
    transform: none;
  }
}