/* ============================================
   小林谈数码 - 深色科技风
   ============================================ */

:root {
  --bg: #0b0e14;
  --bg-soft: #11151d;
  --bg-card: #161b26;
  --bg-hover: #1a2130;
  --border: #232b3a;
  --border-light: #2e3950;
  --text: #e6eaf2;
  --text-muted: #8b94a7;
  --text-dim: #5c6472;
  --accent: #22d3ee;        /* 科技青 */
  --accent-2: #4f8cff;      /* 科技蓝 */
  --gradient: linear-gradient(135deg, #22d3ee, #4f8cff);
  --success: #34d399;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0,0,0,0.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.35);
}

.logo-text span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: color 0.2s;
  padding: 6px 2px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient);
}

.nav-cta {
  padding: 8px 18px;
  border-radius: 8px;
  background: var(--gradient);
  color: #fff !important;
  font-weight: 600 !important;
  transition: transform 0.2s, box-shadow 0.2s !important;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(34, 211, 238, 0.35);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ============ 首页主视觉 ============ */
.hero {
  position: relative;
  padding: 90px 0 70px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.12), transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(79, 140, 255, 0.1), transparent 60%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 50px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 50px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 22px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 2.9rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.08rem;
  margin-bottom: 30px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 0.98rem;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 20px rgba(34, 211, 238, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(34, 211, 238, 0.4);
}

.btn-outline {
  border: 1px solid var(--border-light);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(34, 211, 238, 0.06);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.hero-card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-card-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.hero-card-name {
  font-weight: 700;
}

.hero-card-name small {
  display: block;
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.82rem;
}

.hero-card .card-line {
  height: 1px;
  background: var(--border);
  margin-bottom: 20px;
}

.hero-stat {
  display: flex;
  justify-content: space-between;
  margin-bottom: 14px;
}

.hero-stat .stat-num {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.hero-stat .stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.hero-tag {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 50px;
  background: rgba(34, 211, 238, 0.1);
  color: var(--accent);
  font-size: 0.78rem;
  margin: 4px 4px 0 0;
}

/* ============ 区块通用 ============ */
.section {
  padding: 70px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 20px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.section-title .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-sub {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 8px;
}

.section-more {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 600;
  white-space: nowrap;
}

.section-more:hover { text-decoration: underline; }

/* ============ 精选文章 ============ */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 24px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  cursor: pointer;
}

.post-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-light);
  box-shadow: var(--shadow);
}

.post-thumb {
  height: 190px;
  position: relative;
  overflow: hidden;
}

.post-thumb .thumb-bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
}

.post-thumb .thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,14,20,0.9), transparent 60%);
}

.post-thumb .cat-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(11, 14, 20, 0.7);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

.post-body {
  padding: 18px 20px 20px;
}

.post-title {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-excerpt {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-dim);
  font-size: 0.8rem;
}

.post-meta span { display: inline-flex; align-items: center; gap: 5px; }

/* ============ 分类导航 ============ */
.cats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all 0.25s;
  cursor: pointer;
}

.cat-card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
  transform: translateY(-3px);
}

.cat-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.cat-name {
  font-weight: 700;
  margin-bottom: 4px;
}

.cat-count {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ============ 关于我 ============ */
.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}

.about-avatar-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.about-avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  box-shadow: 0 10px 30px rgba(34, 211, 238, 0.3);
}

.about-role {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

.about-text h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 14px;
  font-size: 0.95rem;
}

.about-stats {
  display: flex;
  gap: 30px;
  margin-top: 20px;
}

.about-stat .num {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.about-stat .lbl {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ============ 联系我 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.contact-methods {
  display: grid;
  gap: 14px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  transition: border-color 0.2s;
}

.contact-item:hover { border-color: var(--accent); }

.contact-item .ci-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(34, 211, 238, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.contact-item .ci-label {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.contact-item .ci-value {
  font-weight: 600;
  font-size: 0.95rem;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
}

.contact-form h4 {
  font-size: 1.15rem;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
}

.form-group textarea { min-height: 110px; resize: vertical; }

/* ============ 页脚 ============ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 30px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}

.footer-brand .logo { margin-bottom: 14px; }

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.95rem;
  margin-bottom: 14px;
  color: var(--text);
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-dim);
  font-size: 0.82rem;
}

/* ============ 文章列表页 ============ */
.page-hero {
  padding: 60px 0 40px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(34,211,238,0.1), transparent 60%);
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
}

.page-hero p {
  color: var(--text-muted);
  margin-top: 10px;
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.filter-chip {
  padding: 8px 18px;
  border-radius: 50px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.filter-chip:hover { border-color: var(--accent); color: var(--accent); }

.filter-chip.active {
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 24px;
}

/* ============ 文章详情弹窗 ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 20px;
  overflow-y: auto;
}

.modal-overlay.show { display: flex; }

.modal {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 760px;
  padding: 36px 40px;
  position: relative;
  animation: modalIn 0.3s ease;
  margin: auto 0;
}

@keyframes modalIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.modal-close:hover { color: var(--text); border-color: var(--accent); }

.modal-cat {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.modal h2 {
  font-size: 1.7rem;
  line-height: 1.3;
  margin-bottom: 14px;
}

.modal .post-meta { margin-bottom: 24px; }

.modal-thumb {
  height: 280px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-bottom: 24px;
}

.modal-body {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.9;
}

.modal-body p { margin-bottom: 16px; }

.modal-body h3 {
  font-size: 1.2rem;
  margin: 24px 0 12px;
  color: var(--accent);
}

.modal-body ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 16px;
}

.modal-body li { margin-bottom: 8px; }

/* ============ Toast 提示 ============ */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  padding: 14px 22px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  color: var(--text);
  font-weight: 500;
  z-index: 9999;
  animation: slideIn 0.3s ease;
  box-shadow: var(--shadow);
  font-size: 0.92rem;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 2.2rem; }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .about-stats { justify-content: center; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .menu-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-soft);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s;
    z-index: 99;
  }
  .nav-links.open { transform: translateY(0); }
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: 1.9rem; }
  .section { padding: 50px 0; }
  .section-title { font-size: 1.5rem; }
  .featured-grid, .article-list { grid-template-columns: 1fr; }
  .post-thumb { height: 160px; }
  .modal { padding: 26px 22px; }
  .modal h2 { font-size: 1.4rem; }
  .modal-thumb { height: 200px; font-size: 3.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .about-grid { padding: 26px 20px; }
  .contact-form { padding: 22px 18px; }
}

@media (max-width: 400px) {
  .featured-grid, .article-list { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}