/* ==========================================================================
   精灵学院云机场 - 日系杂志风 / 极简文青 (Japanese Editorial Magazine Style)
   ========================================================================== */

:root {
  /* Editorial Color Palette */
  --bg-paper: #fcfbf7;
  --bg-paper-subtle: #f4f1ea;
  --bg-card: #ffffff;
  --bg-card-hover: #faf8f2;
  
  --text-main: #1c1917;
  --text-muted: #78716c;
  --text-light: #57534e;

  --accent-vermilion: #dc2626; /* 朱红点缀 */
  --accent-indigo: #1e3a8a;    /* 蓝靛 */
  --accent-amber: #d97706;     /* 琥珀 */

  --border-editorial: #e7e5e4;
  --border-dark: #1c1917;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-paper);
  color: var(--text-main);
  line-height: 1.8;
  overflow-x: hidden;
  letter-spacing: 0.02em;
}

a {
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.25s ease;
}

a:hover {
  color: var(--accent-vermilion);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Magazine Header Bar */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(252, 251, 247, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border-dark);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 84px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--border-dark);
}

.brand-logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
  border: 1px solid var(--border-dark);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  border-bottom-color: var(--accent-vermilion);
}

.btn-nav-recommend {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--text-main);
  color: #ffffff !important;
  padding: 8px 18px;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  z-index: 10;
}

.btn-nav-recommend:hover {
  background: var(--accent-vermilion);
  color: #fff !important;
}

.btn-nav-register {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border-dark);
  color: var(--text-main) !important;
  padding: 6px 18px;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  z-index: 10;
}

.btn-nav-register:hover {
  background: var(--border-dark);
  color: #ffffff !important;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Editorial Hero Section */
.hero {
  padding: 90px 0 60px;
  border-bottom: 1px solid var(--border-editorial);
}

.hero-editorial-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-vermilion);
  font-weight: 700;
  margin-bottom: 16px;
  border-left: 3px solid var(--accent-vermilion);
  padding-left: 10px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 24px;
  color: var(--border-dark);
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 36px;
  line-height: 1.85;
}

.hero-cta {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 34px;
  background: var(--border-dark);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: 4px;
  border: 2px solid var(--border-dark);
  cursor: pointer;
  text-decoration: none;
  position: relative;
  z-index: 10;
}

.btn-cta-primary:hover {
  background: var(--accent-vermilion);
  border-color: var(--accent-vermilion);
  color: #fff !important;
}

.btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  background: transparent;
  color: var(--border-dark) !important;
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: 4px;
  border: 2px solid var(--border-dark);
  cursor: pointer;
  text-decoration: none;
  position: relative;
  z-index: 10;
}

.btn-cta-secondary:hover {
  background: var(--bg-paper-subtle);
}

.hero-side-card {
  background: var(--bg-card);
  border: 2px solid var(--border-dark);
  padding: 36px;
  box-shadow: 6px 6px 0px var(--border-dark);
}

.hero-side-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 8px;
}

.hero-side-list {
  list-style: none;
}

.hero-side-list li {
  padding: 10px 0;
  font-size: 0.95rem;
  border-bottom: 1px dashed var(--border-editorial);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-side-list li span.key {
  font-weight: 700;
}

.hero-side-list li span.val {
  color: var(--accent-vermilion);
  font-weight: 600;
}

/* Feature Grid */
.features {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-editorial);
}

.section-editorial-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-editorial-header .num-tag {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent-vermilion);
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
}

.section-editorial-header h2 {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--border-dark);
}

.section-editorial-header p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-editorial);
  padding: 32px 24px;
  transition: all 0.25s ease;
  position: relative;
}

.feature-card:hover {
  border-color: var(--border-dark);
  box-shadow: 4px 4px 0px var(--border-dark);
  transform: translateY(-3px);
}

.feature-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-vermilion);
  margin-bottom: 12px;
}

.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--border-dark);
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* Pricing Grid (Editorial Cards) */
.pricing {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-editorial);
  background: var(--bg-paper-subtle);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 20px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-editorial);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

.pricing-card.featured {
  border: 2px solid var(--border-dark);
  box-shadow: 5px 5px 0px var(--border-dark);
}

.pricing-card:hover {
  border-color: var(--border-dark);
  box-shadow: 4px 4px 0px var(--border-dark);
}

.pricing-card-badge {
  position: absolute;
  top: -12px;
  right: 16px;
  background: var(--accent-vermilion);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 2px;
}

.pricing-card h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.price {
  font-family: var(--font-serif);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--border-dark);
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-editorial);
  padding-bottom: 12px;
}

.price span {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin-bottom: 24px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.88rem;
  color: var(--text-light);
  padding: 6px 0;
  border-bottom: 1px dashed var(--border-editorial);
}

.btn-plan {
  display: block;
  text-align: center;
  padding: 10px;
  border: 1px solid var(--border-dark);
  color: var(--border-dark);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: all 0.25s ease;
}

.btn-plan:hover, .pricing-card.featured .btn-plan {
  background: var(--border-dark);
  color: #ffffff;
}

/* Articles Section */
.articles-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-editorial);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-editorial);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.article-card:hover {
  border-color: var(--border-dark);
  box-shadow: 4px 4px 0px var(--border-dark);
}

.article-tag {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-vermilion);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.article-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card h3 a {
  color: var(--border-dark);
}

.article-card h3 a:hover {
  color: var(--accent-vermilion);
}

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.article-link {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--border-dark);
  text-decoration: underline;
}

/* Reviews Section */
.reviews-section {
  padding: 80px 0;
  background: var(--bg-paper-subtle);
  border-bottom: 1px solid var(--border-editorial);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-editorial);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: var(--accent-amber);
  margin-bottom: 12px;

}

.review-text {
  font-family: var(--font-serif);
  color: var(--text-main);
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 20px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-editorial);
  padding-top: 14px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--border-dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.user-info h4 {
  font-size: 0.92rem;
  font-weight: 700;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-editorial);
  transition: all 0.25s ease;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--border-dark);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question::after {
  content: '＋';
  font-size: 1.2rem;
  color: var(--accent-vermilion);
}

.faq-item.active .faq-question::after {
  content: '－';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.8;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px 24px;
}

/* Article Detail Pages */
.article-container {
  max-width: 840px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.article-header {
  margin-bottom: 40px;
  text-align: center;
}

.article-header h1 {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 16px;
}

.article-content {
  background: var(--bg-card);
  border: 1px solid var(--border-editorial);
  padding: 40px;
  color: var(--text-main);
  line-height: 1.9;
  font-size: 1.05rem;
}

.article-content h2 {
  font-family: var(--font-serif);
  color: var(--border-dark);
  font-size: 1.6rem;
  margin: 32px 0 16px;
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 6px;
}

.article-content h3 {
  font-family: var(--font-serif);
  color: var(--border-dark);
  font-size: 1.3rem;
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 22px;
}

.article-content ul, .article-content ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

.article-cta-box {
  margin: 40px 0;
  padding: 32px;
  background: var(--bg-paper-subtle);
  border: 2px solid var(--border-dark);
  text-align: center;
}

.article-cta-box h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.article-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-editorial);
}

/* Footer & PBN Links (Core Task 2) */
footer {
  background: var(--bg-paper-subtle);
  border-top: 2px solid var(--border-dark);
  padding: 50px 0 30px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-content {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--border-dark);
}

.footer-brand img {
  width: 32px;
  height: 32px;
  border-radius: 4px;
}

.pbn-links-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 10px 24px;
  border: 1px solid var(--border-editorial);
  background: var(--bg-card);
  font-size: 0.88rem;
}

.pbn-links-area span {
  color: var(--text-muted);
}

.pbn-links-area a {
  color: var(--border-dark);
  font-weight: 600;
  text-decoration: none;
}

.pbn-links-area a:hover {
  color: var(--accent-vermilion);
  text-decoration: underline;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-editorial-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 84px;
    left: 0;
    width: 100%;
    background: var(--bg-paper);
    flex-direction: column;
    padding: 24px;
    border-bottom: 2px solid var(--border-dark);
  }
  .nav-links.active {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
}