/* 杏吧原创平台 - 全局样式 */
:root {
  --bg-primary: #0a0a12;
  --bg-secondary: #12121f;
  --bg-card: #1a1a2e;
  --accent-pink: #e02aff;
  --accent-orange: #ff6b4a;
  --accent-purple: #7c3aed;
  --text-primary: #f5f5f7;
  --text-secondary: #a0a0b8;
  --border-color: rgba(255, 255, 255, 0.08);
  --gradient-brand: linear-gradient(135deg, var(--accent-pink), var(--accent-orange));
  --shadow-glow: 0 4px 24px rgba(224, 42, 255, 0.15);
  --max-width: 1200px;
  --header-height: 64px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--accent-pink);
  text-decoration: none;
  transition: color 0.2s;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 18, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-link:hover {
  color: var(--text-primary);
}

.logo-link img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.main-nav {
  display: flex;
  gap: 28px;
}

.main-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  color: var(--text-primary);
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent-pink);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  display: block;
}

/* 固定广告栏 */
.ads-fixed-bar {
  position: sticky;
  top: var(--header-height);
  z-index: 998;
  background: rgba(18, 18, 31, 0.98);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 10px;
  width: 100%;
}

/* Hero */
.hero {
  padding: 60px 0 40px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(224, 42, 255, 0.12) 0%, transparent 60%);
}

.hero h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  margin-bottom: 16px;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 720px;
  margin: 0 auto 28px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--accent-pink);
  color: var(--accent-pink);
}

/* Sections */
.section {
  padding: 48px 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-title {
  font-size: 1.6rem;
  margin-bottom: 8px;
  text-align: center;
}

.section-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 36px;
  font-size: 0.95rem;
}

/* Cards Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card-img {
  aspect-ratio: 9/16;
  max-height: 320px;
  object-fit: cover;
  object-position: top;
  width: 100%;
}

.card-body {
  padding: 16px;
}

.card-body h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.card-body p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Content prose */
.prose {
  max-width: 860px;
  margin: 0 auto;
}

.prose h2 {
  font-size: 1.4rem;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.prose h3 {
  font-size: 1.15rem;
  margin: 24px 0 12px;
  color: var(--accent-pink);
}

.prose p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.prose ul, .prose ol {
  margin: 0 0 16px 24px;
  color: var(--text-secondary);
}

.prose li {
  margin-bottom: 8px;
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Feature row */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.feature-row.reverse {
  direction: rtl;
}

.feature-row.reverse > * {
  direction: ltr;
}

.feature-img {
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-glow);
}

.feature-text h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.feature-text p {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.step-item {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-color);
  text-align: center;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-brand);
  font-weight: 700;
  margin-bottom: 12px;
}

.step-item h4 {
  margin-bottom: 8px;
}

.step-item p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* FAQ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border-radius: 10px;
  margin-bottom: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.faq-q {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-a {
  padding: 0 20px 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: none;
}

.faq-item.open .faq-a {
  display: block;
}

.faq-item.open .faq-q::after {
  content: "−";
}

.faq-q::after {
  content: "+";
  color: var(--accent-pink);
  font-size: 1.2rem;
}

/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent-pink);
}

/* Page header */
.page-header {
  padding: 40px 0 24px;
  text-align: center;
  background: var(--bg-secondary);
}

.page-header h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-secondary);
}

/* Error pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.error-page h1 {
  font-size: 1.5rem;
  margin: 16px 0 8px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  margin-top: 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand img {
  width: 48px;
  border-radius: 10px;
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Tags */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(224, 42, 255, 0.1);
  border: 1px solid rgba(224, 42, 255, 0.3);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--accent-pink);
}

/* Internal links box */
.link-box {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-color);
  margin: 32px 0;
}

.link-box h3 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.link-box ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}

.link-box a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.link-box a:hover {
  color: var(--accent-pink);
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    display: none;
    border-bottom: 1px solid var(--border-color);
  }

  .main-nav.open {
    display: flex;
  }

  .feature-row {
    grid-template-columns: 1fr;
  }

  .feature-row.reverse {
    direction: ltr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .card-img {
    max-height: 280px;
  }

  .hero {
    padding: 40px 0 30px;
  }

  .section {
    padding: 32px 0;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}