/* ===== 郭昂 - 个人博客样式 v2 ===== */
:root {
  --primary: #1a2a4a;
  --primary-light: #2a4a7a;
  --accent: #00b4d8;
  --accent-light: #90e0ef;
  --accent-dark: #0077b6;
  --text: #2d3436;
  --text-light: #636e72;
  --bg: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
  --radius: 12px;
  --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.7; overflow-x: hidden;
}

/* ===== Header ===== */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(26,42,74,0.95); backdrop-filter: blur(10px);
  padding: 0 2rem; transition: var(--transition);
}
header.scrolled { background: rgba(26,42,74,0.98); box-shadow: 0 2px 20px rgba(0,0,0,0.2); }
nav { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo { font-size: 1.4rem; font-weight: 700; color: var(--white); text-decoration: none; letter-spacing: 1px; }
.logo span { color: var(--accent); }
.nav-links { display: flex; list-style: none; gap: 2rem; }
.nav-links a {
  color: rgba(255,255,255,0.85); text-decoration: none; font-size: 0.95rem;
  font-weight: 500; transition: var(--transition); position: relative; padding: 0.5rem 0;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0;
  height: 2px; background: var(--accent); transition: var(--transition);
}
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.mobile-toggle span { width: 25px; height: 2px; background: var(--white); transition: var(--transition); border-radius: 2px; }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f1b30 0%, #1a2a4a 40%, #1e3a6a 70%, #0a1628 100%);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.hero-floating {
  position: absolute; border-radius: 50%;
  opacity: 0.06; pointer-events: none;
}
.hero-floating.f1 { width: 500px; height: 500px; background: radial-gradient(circle, var(--accent), transparent 70%); top: -100px; right: -100px; animation: float 8s ease-in-out infinite; }
.hero-floating.f2 { width: 350px; height: 350px; background: radial-gradient(circle, var(--accent-light), transparent 70%); bottom: -80px; left: -80px; animation: float 6s ease-in-out infinite reverse; }
.hero-floating.f3 { width: 200px; height: 200px; background: radial-gradient(circle, var(--accent-dark), transparent 70%); top: 30%; left: 10%; animation: float 10s ease-in-out infinite; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content { text-align: center; z-index: 2; padding: 2rem; max-width: 800px; }
.hero-badge {
  display: inline-block; background: rgba(0,180,216,0.15);
  color: var(--accent-light); padding: 0.4rem 1.2rem; border-radius: 50px;
  font-size: 0.85rem; font-weight: 500; letter-spacing: 2px;
  margin-bottom: 1.5rem; border: 1px solid rgba(0,180,216,0.3);
}
.hero h1 { font-size: 3.5rem; font-weight: 800; color: var(--white); margin-bottom: 0.5rem; letter-spacing: -1px; }
.hero h1 span { color: var(--accent); }
.hero .subtitle { font-size: 1.3rem; color: var(--accent-light); margin-bottom: 1rem; font-weight: 500; }
.hero .tagline { font-size: 1.1rem; color: rgba(255,255,255,0.65); margin-bottom: 2.5rem; line-height: 1.8; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 0.9rem 2.2rem; border-radius: 50px;
  text-decoration: none; font-weight: 600; font-size: 0.95rem;
  transition: var(--transition); cursor: pointer; border: none;
}
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,180,216,0.4); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.3); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.scroll-indicator { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); z-index: 2; animation: bounce 2s infinite; }
.scroll-indicator a { color: rgba(255,255,255,0.4); font-size: 1.5rem; text-decoration: none; }
@keyframes float { 0%,100%{transform:translate(0,0)} 50%{transform:translate(30px,-30px)} }
@keyframes bounce { 0%,20%,50%,80%,100%{transform:translateX(-50%) translateY(0)} 40%{transform:translateX(-50%) translateY(-10px)} 60%{transform:translateX(-50%) translateY(-5px)} }

/* ===== Sections Common ===== */
.section-alt { background: var(--white); }
.section { padding: 5rem 2rem; max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 { font-size: 2.2rem; font-weight: 700; color: var(--primary); margin-bottom: 0.8rem; }
.section-header .divider {
  width: 60px; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  margin: 0 auto 1rem; border-radius: 2px;
}
.section-header p { color: var(--text-light); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* ===== Stats ===== */
#stats {
  background: var(--primary); padding: 3rem 2rem;
  background-image: linear-gradient(135deg, rgba(0,180,216,0.05) 0%, transparent 100%);
}
.stats-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255,255,255,0.1); }
.stat-item { text-align: center; padding: 2.5rem 1.5rem; background: var(--primary); }
.stat-number { font-size: 2.5rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-top: 0.4rem; }

/* ===== Focus Areas ===== */
.focus-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; }
.focus-card {
  background: var(--white); border-radius: var(--radius); padding: 2rem 1.5rem;
  text-align: center; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid rgba(0,0,0,0.04);
}
.focus-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.focus-icon {
  width: 60px; height: 60px; border-radius: 16px;
  background: linear-gradient(135deg, rgba(0,180,216,0.1), rgba(0,119,182,0.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; margin: 0 auto 1rem;
}
.focus-card h4 { font-size: 1.05rem; color: var(--primary); margin-bottom: 0.4rem; }
.focus-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 3rem; align-items: start; }
.about-card { background: var(--bg); border-radius: var(--radius); padding: 2.5rem; box-shadow: var(--shadow); }
.about-avatar {
  width: 120px; height: 120px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; color: var(--white); font-weight: 700; margin: 0 auto 1.5rem;
}
.about-card h3 { text-align: center; font-size: 1.4rem; color: var(--primary); margin-bottom: 0.3rem; }
.about-card .role { text-align: center; color: var(--accent-dark); font-weight: 500; margin-bottom: 0.3rem; }
.about-card .industry { text-align: center; color: var(--text-light); font-size: 0.9rem; margin-bottom: 1.5rem; }
.info-list { list-style: none; }
.info-list li { padding: 0.7rem 0; border-bottom: 1px solid rgba(0,0,0,0.06); display: flex; gap: 0.5rem; font-size: 0.95rem; }
.info-list li:last-child { border-bottom: none; }
.info-list .label { color: var(--text-light); min-width: 70px; }
.info-list .value { color: var(--text); font-weight: 500; }
.about-content h3 { font-size: 1.5rem; color: var(--primary); margin-bottom: 1.2rem; }
.about-content p { color: var(--text); margin-bottom: 1.2rem; font-size: 1rem; line-height: 1.9; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1.5rem; }
.highlight-item { background: var(--bg); padding: 1.2rem; border-radius: var(--radius); border-left: 3px solid var(--accent); }
.highlight-item h4 { font-size: 1rem; color: var(--primary); margin-bottom: 0.3rem; }
.highlight-item p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0; }

/* ===== Skills ===== */
.skills-section { margin-top: 2.5rem; }
.skills-section h4 { font-size: 1.1rem; color: var(--primary); margin-bottom: 1.2rem; }
.skills-list { display: flex; flex-direction: column; gap: 1rem; }
.skill-item { display: flex; flex-direction: column; gap: 0.3rem; }
.skill-item .skill-header { display: flex; justify-content: space-between; font-size: 0.9rem; }
.skill-item .skill-name { font-weight: 600; color: var(--text); }
.skill-item .skill-pct { color: var(--accent-dark); font-weight: 600; }
.skill-bar { width: 100%; height: 8px; background: rgba(0,0,0,0.06); border-radius: 4px; overflow: hidden; }
.skill-bar-fill {
  height: 100%; border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  transition: width 0.8s ease; width: 0;
}

/* ===== Timeline ===== */
.timeline-section { margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid rgba(0,0,0,0.06); }
.timeline-section h4 { font-size: 1.1rem; color: var(--primary); margin-bottom: 1.2rem; }
.timeline { position: relative; padding-left: 2rem; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 0; bottom: 0; width: 2px; background: rgba(0,180,216,0.2); }
.timeline-item { position: relative; padding-bottom: 1.5rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute; left: -2rem; top: 4px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--white); border: 3px solid var(--accent);
}
.timeline-item .time { font-size: 0.8rem; color: var(--accent-dark); font-weight: 600; }
.timeline-item h5 { font-size: 0.95rem; color: var(--primary); margin: 0.15rem 0 0.2rem; }
.timeline-item p { font-size: 0.85rem; color: var(--text-light); margin: 0; }

/* ===== Blog ===== */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 2rem; }
.blog-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: var(--transition); cursor: pointer;
}
.blog-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.blog-card-img {
  height: 200px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
}
.blog-card-img img {
  width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease;
}
.blog-card:hover .blog-card-img img { transform: scale(1.08); }
.blog-card-img .overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,0.5));
}
.blog-card-img .card-icon {
  position: absolute; top: 1rem; left: 1rem; z-index: 2;
  font-size: 2.5rem; line-height: 1;
}
.blog-card-body { padding: 1.5rem; }
.blog-card .date { font-size: 0.8rem; color: var(--text-light); margin-bottom: 0.5rem; }
.blog-card .tag {
  display: inline-block; background: rgba(0,180,216,0.1); color: var(--accent-dark);
  border-radius: 50px; font-size: 0.75rem; font-weight: 600; margin-bottom: 0.8rem;
}
.blog-card h3 { font-size: 1.15rem; color: var(--primary); margin-bottom: 0.5rem; line-height: 1.4; }
.blog-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1rem; }
.blog-card .read-more {
  color: var(--accent-dark); font-weight: 600; font-size: 0.9rem;
  display: inline-flex; align-items: center; gap: 0.3rem; transition: var(--transition);
}
.blog-card .read-more:hover { gap: 0.6rem; }

/* ===== Newsletter ===== */
#newsletter {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  padding: 4rem 2rem; text-align: center;
}
.newsletter-box { max-width: 550px; margin: 0 auto; }
.newsletter-box h3 { font-size: 1.5rem; color: var(--white); margin-bottom: 0.8rem; }
.newsletter-box p { color: rgba(255,255,255,0.65); margin-bottom: 1.5rem; font-size: 0.95rem; }
.newsletter-form { display: flex; gap: 0.8rem; }
.newsletter-form input {
  flex: 1; padding: 0.8rem 1.2rem; border: none; border-radius: 8px;
  font-size: 0.95rem; outline: none;
}
.newsletter-form button {
  padding: 0.8rem 1.8rem; background: var(--accent); color: var(--white);
  border: none; border-radius: 8px; font-weight: 600; cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.newsletter-form button:hover { background: var(--accent-dark); }

/* ===== Contact ===== */
#contact { background: var(--white); padding: 5rem 2rem; }
.contact-wrap { max-width: 1200px; margin: 0 auto; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.contact-info h3 { font-size: 1.3rem; color: var(--primary); margin-bottom: 1rem; }
.contact-info p { color: var(--text-light); margin-bottom: 1.5rem; }
.contact-item { display: flex; align-items: center; gap: 1rem; padding: 0.8rem 0; border-bottom: 1px solid rgba(0,0,0,0.05); }
.contact-item:last-child { border-bottom: none; }
.contact-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(0,180,216,0.1); display: flex; align-items: center; justify-content: center;
  color: var(--accent-dark); font-size: 1.1rem; flex-shrink: 0;
}
.contact-item .label { font-size: 0.8rem; color: var(--text-light); }
.contact-item .value { font-size: 0.95rem; color: var(--text); font-weight: 500; }
.contact-form { background: var(--bg); padding: 2rem; border-radius: var(--radius); box-shadow: var(--shadow); }
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 600; color: var(--primary); margin-bottom: 0.4rem; }
.form-group input, .form-group textarea {
  width: 100%; padding: 0.8rem 1rem; border: 2px solid rgba(0,0,0,0.08);
  border-radius: 8px; font-size: 0.95rem; font-family: inherit;
  transition: var(--transition); background: var(--white); outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,180,216,0.1); }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-submit {
  width: 100%; padding: 0.9rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white); border: none; border-radius: 8px;
  font-size: 1rem; font-weight: 600; cursor: pointer; transition: var(--transition);
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,180,216,0.4); }

/* ===== Footer ===== */
footer { background: var(--primary); color: rgba(255,255,255,0.7); text-align: center; padding: 3rem 2rem 2rem; font-size: 0.9rem; }
.footer-social { display: flex; justify-content: center; gap: 1rem; margin-bottom: 1.5rem; }
.footer-social a {
  width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.6); text-decoration: none; font-size: 1.2rem;
  transition: var(--transition);
}
.footer-social a:hover { background: rgba(0,180,216,0.2); color: var(--accent-light); transform: translateY(-2px); }
footer .copyright { font-size: 0.85rem; }

/* ===== Blog Modal ===== */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 2rem;
}
.modal-overlay.active { display: flex; }
.modal-content {
  background: var(--white); border-radius: var(--radius);
  max-width: 700px; width: 100%; max-height: 85vh; overflow-y: auto;
  padding: 2.5rem; position: relative; animation: modalIn 0.3s ease;
}
@keyframes modalIn { from{opacity:0;transform:scale(0.95) translateY(15px)} to{opacity:1;transform:scale(1) translateY(0)} }
.modal-close {
  position: absolute; top: 1rem; right: 1rem; width: 36px; height: 36px;
  border-radius: 50%; border: none; background: var(--bg); font-size: 1.2rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center; transition: var(--transition);
}
.modal-close:hover { background: #e0e0e0; }
.modal-content .blog-date { font-size: 0.85rem; color: var(--text-light); margin-bottom: 0.5rem; }
.modal-content .blog-tag {
  display: inline-block; background: rgba(0,180,216,0.1); color: var(--accent-dark);
  border-radius: 50px; font-size: 0.8rem; font-weight: 600; margin-bottom: 1rem;
}
.modal-content h2 { font-size: 1.6rem; color: var(--primary); margin-bottom: 1.5rem; }
.modal-content h3 { font-size: 1.2rem; color: var(--primary); margin: 1.5rem 0 0.8rem; }
.modal-content p { color: var(--text); margin-bottom: 1rem; line-height: 1.8; }
.modal-content ul, .modal-content ol { margin: 0.5rem 0 1rem 1.5rem; }
.modal-content li { margin-bottom: 0.5rem; color: var(--text); }
.modal-content blockquote {
  border-left: 3px solid var(--accent); padding: 0.8rem 1.2rem; margin: 1rem 0;
  background: rgba(0,180,216,0.05); border-radius: 0 8px 8px 0; color: var(--text-light); font-style: italic;
}

/* ===== Scroll Reveal ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero .subtitle { font-size: 1.1rem; }
  .hero .tagline { font-size: 0.95rem; }
  .nav-links { display: none; position: absolute; top: 70px; left: 0; right: 0; background: rgba(26,42,74,0.98); flex-direction: column; padding: 1rem 2rem; gap: 0; }
  .nav-links.active { display: flex; }
  .nav-links a { padding: 0.8rem 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav-links a:last-child { border-bottom: none; }
  .nav-links a::after { display: none; }
  .mobile-toggle { display: flex; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .focus-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-highlights { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .newsletter-form { flex-direction: column; }
  .section, .section-alt .section { padding: 3rem 1.2rem; }
  #stats { padding: 2rem 1.2rem; }
  #contact { padding: 3rem 1.2rem; }
  .focus-grid { gap: 1rem; }
}