/* 杏吧原创官方网站 - 全局样式 */
:root {
  --bg-primary: #0a0a12;
  --bg-secondary: #12121c;
  --bg-card: #1a1a28;
  --bg-card-hover: #222233;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;
  --accent-purple: #9b59f5;
  --accent-pink: #e84393;
  --accent-orange: #f39c12;
  --accent-gradient: linear-gradient(135deg, #9b59f5 0%, #e84393 50%, #f39c12 100%);
  --border-color: #2a2a3d;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --radius-sm: 8px;
  --header-height: 64px;
  --max-width: 1200px;
  --transition: 0.25s ease;
  --page-gutter: 20px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

a {
  color: var(--accent-purple);
  text-decoration: none;
  transition: color var(--transition);
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: max(var(--page-gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--page-gutter), env(safe-area-inset-right, 0px));
}

/* 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: 1.25rem;
}

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

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

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

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

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

.main-nav a.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 1px;
}

.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);
  line-height: 0;
  flex-shrink: 0;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 24px;
  pointer-events: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line-top {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line-middle {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line-bottom {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle-line-top,
.nav-toggle-line-middle,
.nav-toggle-line-bottom {
  transform-origin: center;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Hero */
.hero {
  padding: 60px 0 80px;
  background: radial-gradient(ellipse at 50% 0%, rgba(155, 89, 245, 0.15) 0%, transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 2.5rem;
  line-height: 1.3;
  margin-bottom: 20px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content .subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
  color: #fff;
  transform: translateY(-2px);
}

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

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

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
}

.hero-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.hero-image .phone-frame {
  max-width: 320px;
  margin: 0 auto;
}

/* Section */
.section {
  padding: 72px 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.section-header .section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(155, 89, 245, 0.15);
  color: var(--accent-purple);
  border-radius: 4px;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(155, 89, 245, 0.3);
  transform: translateY(-4px);
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

/* Content Block with Image */
.content-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 64px;
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block.reverse {
  direction: rtl;
}

.content-block.reverse > * {
  direction: ltr;
}

.content-block img {
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

.content-block h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.content-block p {
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.content-block ul {
  list-style: none;
  margin-top: 16px;
}

.content-block ul li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  color: var(--text-secondary);
}

.content-block ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-purple);
  font-weight: bold;
}

/* Screenshot Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.gallery-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.gallery-item:hover {
  transform: scale(1.03);
  border-color: var(--accent-purple);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
}

.gallery-item figcaption {
  padding: 10px;
  background: var(--bg-card);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-item {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  position: relative;
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: 50%;
  font-weight: 700;
  margin: 0 auto 16px;
}

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

.step-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-question {
  width: 100%;
  padding: 18px 24px;
  background: var(--bg-card);
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--accent-purple);
  transition: var(--transition);
}

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

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-secondary);
}

.faq-item.open .faq-answer {
  padding: 0 24px 18px;
  max-height: 500px;
}

/* Article / Legal Pages */
.page-hero {
  padding: 48px 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.page-hero h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.page-hero .breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.article-content {
  padding-top: 48px;
  padding-bottom: 80px;
  max-width: 860px;
  margin: 0 auto;
}

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

.article-content h3 {
  font-size: 1.15rem;
  margin: 24px 0 12px;
}

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

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

.article-content li {
  margin-bottom: 8px;
}

.article-content .updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

/* Error Pages */
.error-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 0;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

.error-page h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* TOC */
.toc {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 40px;
}

.toc h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.toc ol {
  margin-left: 20px;
  color: var(--text-secondary);
}

.toc li {
  margin-bottom: 6px;
}

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

.toc a:hover {
  color: var(--accent-purple);
}

/* Text content sections on homepage */
.text-section {
  max-width: 860px;
  margin: 0 auto;
}

.text-section h2 {
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.text-section h3 {
  font-size: 1.2rem;
  margin: 28px 0 12px;
  color: var(--text-primary);
}

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

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

/* 广告栏 */
.ads-bar-wrap {
  position: sticky;
  top: var(--header-height);
  z-index: 900;
  background: rgba(18, 18, 28, 0.97);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  padding: 10px max(var(--page-gutter), env(safe-area-inset-left, 0px)) 10px max(var(--page-gutter), env(safe-area-inset-right, 0px));
}

#ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 auto;
  max-width: var(--max-width);
}

#ads > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
  box-sizing: border-box;
}

#ads img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(24, 24, 24, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease;
  display: block;
  border: none;
  background: linear-gradient(135deg, #fff, #fff);
}

#ads a {
  display: inline-block;
  text-decoration: none;
  border-radius: 15px;
}

#ads img:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 10px 24px rgba(24, 24, 24, 0.18);
}

#ads figcaption,
#ads .caption {
  height: 15px;
  font-size: 11px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 4px;
}

/* Responsive */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  :root {
    --page-gutter: 20px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 12px max(var(--page-gutter), env(safe-area-inset-left, 0px)) 20px max(var(--page-gutter), env(safe-area-inset-right, 0px));
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav a {
    padding: 14px 4px;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
  }

  .hero {
    padding: 40px 0 56px;
  }

  .hero-grid,
  .content-block {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .content-block.reverse {
    direction: ltr;
  }

  .hero-content h1 {
    font-size: 1.75rem;
    word-break: break-word;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .section-header p {
    padding: 0 4px;
  }

  .feature-grid,
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .feature-card {
    padding: 20px 18px;
  }

  .content-block h3 {
    font-size: 1.25rem;
  }

  .content-block img {
    max-width: 100%;
    margin: 0 auto;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .step-item {
    padding: 20px 18px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer,
  .faq-item.open .faq-answer {
    padding-left: 18px;
    padding-right: 18px;
  }

  .page-hero {
    padding: 36px 0;
  }

  .page-hero h1 {
    font-size: 1.6rem;
  }

  .article-content {
    padding-top: 32px;
    padding-bottom: 56px;
  }

  /* 非首页：移动端内容区左右留白 */
  .sub-page .page-hero .container,
  .sub-page .container.article-content,
  .sub-page .error-page .container {
    padding-left: max(var(--page-gutter), env(safe-area-inset-left, 0px));
    padding-right: max(var(--page-gutter), env(safe-area-inset-right, 0px));
  }

  .sub-page .container.article-content {
    box-sizing: border-box;
  }

  .article-content h2 {
    font-size: 1.25rem;
    margin-top: 28px;
  }

  .article-content ul,
  .article-content ol {
    margin-left: 20px;
    padding-right: 4px;
  }

  .toc {
    padding: 20px 18px;
    margin-bottom: 28px;
  }

  .text-section h2 {
    font-size: 1.35rem;
  }

  .text-section h3 {
    font-size: 1.1rem;
  }

  .text-section p {
    text-align: left;
  }

  .error-page {
    padding: 60px 0;
  }

  .error-code {
    font-size: 4.5rem;
  }

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

  .site-footer {
    padding: 36px 0 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 12px 20px;
  }

  .section {
    padding: 40px 0;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .badge {
    font-size: 0.8rem;
  }
}