/* ============================================================
   ka-card-blog — 7ian's Card Gallery  Global Styles
   二次元卡牌风 · 炫彩潮流 · 收藏家博客
   ============================================================ */

:root {
  --accent-purple: #6c3fc9;
  --accent-pink:   #e84393;
  --accent-blue:   #0abde3;
  --accent-gold:   #f9ca24;
  --accent-orange: #f0932b;
  --dark-bg:       #0a0a1a;
  --dark-card:     #12122a;
  --dark-surface:  #1a1a3e;
  --text-light:    #e8e8f0;
  --text-muted:    #8888aa;
  --text-dim:      #555577;
  --shadow-glow:   0 0 30px rgba(108, 63, 201, 0.3);
  --radius-card:   16px;
  --radius-sm:     10px;
  --transition:    0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height:    68px;
  --font-display:  'Noto Sans SC', sans-serif;
  --font-body:     'Noto Sans SC', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--text-light);
  background: var(--dark-bg);
  line-height: 1.7;
  padding-top: var(--nav-height);
  overflow-x: hidden;
}

/* ===== Animated Background ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(108,63,201,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(233,67,147,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(10,189,227,0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-pink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.3; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; }
p { margin-bottom: 1rem; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }
.section { padding: 60px 0; }

.section-title { text-align: center; margin-bottom: 2.5rem; }
.section-title h2 {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 60px; height: 3px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-pink));
  margin: 12px auto 0;
  border-radius: 2px;
}
.section-title p { color: var(--text-muted); margin-top: 8px; font-size: 0.92rem; }

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; height: var(--nav-height);
  background: rgba(10,10,26,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(108,63,201,0.15);
  z-index: 1000;
  display: flex; align-items: center;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.navbar .logo {
  font-family: var(--font-display); font-size: 1.2rem; font-weight: 700;
  display: flex; align-items: center; gap: 8px;
}
.navbar .logo i { color: var(--accent-gold); font-size: 1.3rem; }
.navbar .logo span { background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.navbar .logo .sub { font-weight: 400; font-size: 0.8rem; color: var(--text-muted); -webkit-text-fill-color: var(--text-muted); }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a {
  color: var(--text-muted); font-size: 0.88rem; font-weight: 500;
  position: relative; padding: 4px 0;
  transition: var(--transition);
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-pink));
  transition: var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a:hover, .nav-links a.active { color: var(--text-light); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-light); border-radius: 2px; transition: var(--transition); }

/* ===== Hero ===== */
.hero {
  display: flex; align-items: center; gap: 50px;
  padding: 50px 0; min-height: 380px;
}
.hero-text { flex: 1; }
.hero-text .badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  color: #fff;
  margin-bottom: 12px;
}
.hero-text h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 12px;
}
.hero-text h1 .highlight {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text .slogan { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 20px; line-height: 1.6; }
.hero-stats {
  display: flex; gap: 30px; margin: 20px 0;
}
.hero-stats .stat { text-align: center; }
.hero-stats .num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stats .label { font-size: 0.72rem; color: var(--text-muted); }
.hero-img { flex-shrink: 0; width: 280px; }
.hero-img .hero-portrait {
  width: 280px; height: 350px;
  border-radius: var(--radius-card);
  border: 2px solid rgba(108,63,201,0.3);
  box-shadow: var(--shadow-glow);
  object-fit: cover;
  display: block;
}
.hero-img .card-placeholder {
  width: 240px; height: 336px;
  background: linear-gradient(135deg, var(--dark-surface), var(--dark-card));
  border-radius: var(--radius-card);
  border: 2px solid rgba(108,63,201,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}
.hero-img .card-placeholder::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent, rgba(108,63,201,0.1), transparent);
  animation: shimmer 3s ease-in-out infinite;
}
@keyframes shimmer {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-block; padding: 10px 26px;
  border-radius: 50px; font-family: var(--font-body);
  font-weight: 600; font-size: 0.88rem; border: none;
  cursor: pointer; transition: var(--transition); text-align: center;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(108,63,201,0.4); }
.btn-outline {
  background: transparent; color: var(--accent-blue);
  border: 2px solid var(--accent-blue);
}
.btn-outline:hover { background: var(--accent-blue); color: #fff; transform: translateY(-2px); }
.btn-gold {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  color: #1a1a2e;
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(249,202,36,0.3); }
.btn-sm { padding: 6px 18px; font-size: 0.8rem; }

/* ===== Card Grid ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ===== Card Item (3D卡牌风) ===== */
.trading-card {
  background: var(--dark-card);
  border-radius: var(--radius-card);
  border: 1px solid rgba(108,63,201,0.15);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.trading-card:hover {
  transform: translateY(-6px) rotateY(3deg);
  box-shadow: 0 12px 40px rgba(108,63,201,0.25);
  border-color: var(--accent-purple);
}
.trading-card .card-art {
  width: 100%; height: 200px;
  background: linear-gradient(135deg, var(--dark-surface), #2a1a4e);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}
.trading-card .card-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.trading-card .card-art .rarity {
  position: absolute; top: 10px; right: 10px;
  padding: 2px 10px; border-radius: 10px;
  font-size: 0.65rem; font-weight: 700;
}
.rarity-gold { background: linear-gradient(135deg, #f9ca24, #f0932b); color: #1a1a2e; }
.rarity-purple { background: linear-gradient(135deg, #6c3fc9, #e84393); color: #fff; }
.rarity-blue { background: linear-gradient(135deg, #0abde3, #0984e3); color: #fff; }
.rarity-silver { background: #636e72; color: #fff; }
.trading-card .card-info { padding: 14px; }
.trading-card .card-info h4 { font-size: 0.95rem; margin-bottom: 2px; }
.trading-card .card-info .player { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }
.trading-card .card-info .meta { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--text-dim); }
.trading-card .card-info .price {
  color: var(--accent-gold);
  font-weight: 700;
}

/* ===== Knowledge Card ===== */
.knowledge-card {
  background: var(--dark-card);
  border-radius: var(--radius-card);
  padding: 24px;
  border-left: 3px solid var(--accent-purple);
  transition: var(--transition);
}
.knowledge-card:hover { border-left-color: var(--accent-pink); transform: translateX(4px); }
.knowledge-card h4 { margin-bottom: 6px; }
.knowledge-card h4 i { color: var(--accent-gold); margin-right: 8px; }
.knowledge-card p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }
.knowledge-card .tag-read { font-size: 0.75rem; color: var(--accent-blue); margin-top: 8px; display: inline-block; }

/* ===== Post Card ===== */
.post-card {
  background: var(--dark-card);
  border-radius: var(--radius-card);
  padding: 20px;
  border: 1px solid rgba(108,63,201,0.1);
  transition: var(--transition);
}
.post-card:hover { border-color: var(--accent-pink); transform: translateY(-3px); }
.post-card .post-meta { font-size: 0.72rem; color: var(--text-dim); margin-bottom: 6px; }
.post-card .post-meta .tag {
  display: inline-block; padding: 1px 8px; border-radius: 8px;
  font-size: 0.65rem; font-weight: 600; margin-right: 6px;
}
.post-card h4 { margin-bottom: 6px; font-size: 0.95rem; }
.post-card p { font-size: 0.82rem; color: var(--text-muted); margin: 0 0 8px; }

/* ===== Page Header ===== */
.page-header {
  background: linear-gradient(135deg, var(--dark-surface), #1a0a2e);
  padding: 40px 0 30px;
  text-align: center;
  border-bottom: 1px solid rgba(108,63,201,0.1);
}
.page-header h1 { margin-bottom: 6px; }
.page-header p { color: var(--text-muted); font-size: 0.92rem; }
.breadcrumb { padding: 14px 0; font-size: 0.82rem; color: var(--text-dim); }
.breadcrumb a { color: var(--accent-blue); }
.breadcrumb span { color: var(--text-dim); }

/* ===== Filter ===== */
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.filter-chip {
  padding: 6px 16px; border-radius: 20px;
  border: 1px solid rgba(108,63,201,0.2);
  font-size: 0.8rem; cursor: pointer; transition: var(--transition);
  background: var(--dark-card); color: var(--text-muted);
}
.filter-chip.active, .filter-chip:hover {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  color: #fff; border-color: transparent;
}

/* ===== Feature Cards ===== */
.feature-card {
  text-align: center; padding: 30px 20px;
  background: var(--dark-card);
  border-radius: var(--radius-card);
  border: 1px solid rgba(108,63,201,0.1);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--accent-purple); }
.feature-card i { font-size: 2rem; margin-bottom: 12px; }
.feature-card h4 { margin-bottom: 6px; }
.feature-card p { font-size: 0.84rem; color: var(--text-muted); margin: 0; }

/* ===== Footer ===== */
.footer {
  background: linear-gradient(135deg, #0a0a1a, #0d0d2b);
  border-top: 1px solid rgba(108,63,201,0.1);
  padding: 40px 0 20px;
  color: var(--text-muted);
}
.footer .container { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; }
.footer h4 { color: var(--text-light); margin-bottom: 10px; font-size: 0.9rem; }
.footer a { color: var(--text-muted); font-size: 0.84rem; }
.footer a:hover { color: var(--accent-pink); }
.footer .footer-bottom {
  grid-column: 1/-1;
  border-top: 1px solid rgba(108,63,201,0.1);
  padding-top: 14px; margin-top: 14px;
  font-size: 0.78rem; text-align: center; color: var(--text-dim);
}

/* ===== Review Card ===== */
.review-card {
  padding: 20px;
  background: var(--dark-card);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  border: 1px solid rgba(108,63,201,0.08);
}
.review-header { display: flex; justify-content: space-between; margin-bottom: 6px; }
.review-name { font-weight: 600; font-size: 0.85rem; }
.review-date { font-size: 0.75rem; color: var(--text-dim); }
.review-text { font-size: 0.82rem; color: var(--text-muted); }

/* ===== Gallery ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.gallery-item {
  border-radius: var(--radius-card);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  background: var(--dark-card);
  aspect-ratio: 3/4;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem;
  border: 1px solid rgba(108,63,201,0.1);
  transition: var(--transition);
}
.gallery-item:hover { border-color: var(--accent-purple); transform: scale(1.02); }
.gallery-item .gallery-label {
  position: absolute; bottom: 0; left: 0; right: 0; padding: 10px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  font-size: 0.78rem; color: #fff;
}

/* ===== Contact Form ===== */
.contact-form { display: flex; flex-direction: column; gap: 14px; max-width: 560px; margin: 0 auto; }
.contact-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-form label { font-size: 0.85rem; font-weight: 600; }
.contact-form input, .contact-form select, .contact-form textarea {
  padding: 10px 14px;
  border: 1px solid rgba(108,63,201,0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
  width: 100%;
  background: var(--dark-card);
  color: var(--text-light);
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 15px rgba(108,63,201,0.15);
}
.contact-form textarea { min-height: 100px; resize: vertical; }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: var(--text-dim); }

/* ===== Submit ===== */
.submit-page { text-align: center; padding: 80px 20px; }
.submit-page i { font-size: 3.5rem; background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 16px; }
.submit-page h2 { margin-bottom: 10px; }

/* ===== Stats Row ===== */
.stats-row { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin: 24px 0; }
.stat-item { text-align: center; }
.stat-item .num { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-item .label { font-size: 0.78rem; color: var(--text-muted); }

/* ===== Community Post ===== */
.community-post {
  padding: 18px;
  background: var(--dark-card);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  border: 1px solid rgba(108,63,201,0.08);
  transition: var(--transition);
}
.community-post:hover { border-color: var(--accent-blue); }
.community-post .post-header { display: flex; justify-content: space-between; margin-bottom: 6px; }
.community-post .post-author { font-weight: 600; font-size: 0.85rem; }
.community-post .post-time { font-size: 0.72rem; color: var(--text-dim); }
.community-post .post-content { font-size: 0.85rem; color: var(--text-light); margin-bottom: 8px; }
.community-post .post-tags { display: flex; gap: 6px; }
.community-post .post-tags span {
  font-size: 0.65rem; padding: 2px 8px; border-radius: 8px;
  background: rgba(108,63,201,0.12); color: var(--accent-blue);
}

/* ===== Timeline ===== */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ''; position: absolute; left: 10px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(180deg, var(--accent-purple), var(--accent-pink), transparent);
}
.timeline-item { position: relative; margin-bottom: 24px; }
.timeline-item::before {
  content: ''; position: absolute; left: -24px; top: 4px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent-purple); border: 2px solid var(--dark-bg);
}
.timeline-item .time { font-size: 0.72rem; color: var(--text-dim); }
.timeline-item h4 { margin-bottom: 4px; }
.timeline-item p { font-size: 0.84rem; color: var(--text-muted); margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  .hero { flex-direction: column-reverse; text-align: center; padding: 30px 0; }
  .hero-img { width: 180px; }
  .hero-img .hero-portrait { width: 180px; height: 225px; }
  .hero-img .card-placeholder { width: 160px; height: 224px; font-size: 2rem; }
  .hero-stats { justify-content: center; }
  .nav-links {
    display: none; position: absolute; top: var(--nav-height); left: 0; width: 100%;
    flex-direction: column; background: rgba(10,10,26,0.98); padding: 20px; gap: 10px;
    border-bottom: 1px solid rgba(108,63,201,0.15);
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-row { flex-direction: column; gap: 16px; }
  .footer .container { grid-template-columns: 1fr; }
  .contact-form .form-row { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .trading-card .card-art { height: 160px; }
}