@import url('https://fonts.googleapis.com/css2?family=Archivo+Black&family=Space+Grotesk:wght@400;500;700&display=swap');

/* ==========================================================================
   Bitz Net - 新粗野主义印刷/报纸美学样式表
   色彩规范：
   - 纸感底色: #F1EDE3
   - 油墨黑:   #141414
   - 信号红:   #E63B2E
   - 次级灰:   #6E6759
   ========================================================================== */

:root {
  --bg-paper: #F1EDE3;
  --ink-black: #141414;
  --signal-red: #E63B2E;
  --ink-gray: #6E6759;
  --border-thick: 2px solid #141414;
  --border-heavy: 3px solid #141414;
  --shadow-hard: 6px 6px 0 #141414;
  --shadow-button: 4px 4px 0 #141414;
  --font-headline: 'Archivo Black', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* 严禁圆角 */
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-paper);
}

body {
  background-color: var(--bg-paper);
  color: var(--ink-black);
  font-family: var(--font-body);
  line-height: 1.6;
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 印刷报纸基准排版 */
a {
  color: var(--ink-black);
  text-decoration: none;
  transition: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* 顶部新闻通栏跑马条 */
.ticker-bar {
  background-color: var(--ink-black);
  color: var(--bg-paper);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 0;
  border-bottom: 2px solid var(--ink-black);
  overflow: hidden;
  white-space: nowrap;
}

.ticker-content {
  display: inline-block;
  animation: ticker 30s linear infinite;
}

@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 容器与网格 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-wrapper {
  border-bottom: var(--border-heavy);
  padding: 64px 0;
  position: relative;
}

/* 粗野主义印刷网格发丝线 */
.grid-hairline {
  display: grid;
  border: var(--border-thick);
  background-color: var(--ink-black);
  gap: 2px;
}

.grid-cell {
  background-color: var(--bg-paper);
  padding: 32px;
}

/* 章节头部 (含超大竖排序号) */
.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 40px;
  border-bottom: var(--border-thick);
  padding-bottom: 20px;
}

.section-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.section-num {
  font-family: var(--font-headline);
  font-size: 3.5rem;
  line-height: 1;
  color: var(--ink-black);
  letter-spacing: -2px;
}

.section-title {
  font-family: var(--font-headline);
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: -0.5px;
  color: var(--ink-black);
}

.section-subtitle {
  color: var(--ink-gray);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
}

/* 导航栏 Header */
.site-header {
  border-bottom: var(--border-heavy);
  background-color: var(--bg-paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px 0 0;
  border-right: var(--border-thick);
}

.logo-box {
  width: 44px;
  height: 44px;
  background-color: var(--ink-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-headline);
  color: var(--bg-paper);
  font-size: 1.8rem;
  line-height: 1;
  position: relative;
}

.logo-dot {
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  background-color: var(--signal-red);
}

.brand-wordmark {
  font-family: var(--font-headline);
  font-size: 1.6rem;
  letter-spacing: 0.5px;
  color: var(--ink-black);
  display: flex;
  align-items: center;
}

.brand-dot {
  color: var(--signal-red);
  margin: 0 2px;
  font-size: 1rem;
}

.main-nav {
  display: flex;
  align-items: stretch;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: stretch;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0 20px;
  font-weight: 700;
  font-size: 0.95rem;
  border-left: var(--border-thick);
  transition: none;
}

.nav-item:hover {
  background-color: var(--ink-black);
  color: var(--bg-paper);
}

.nav-cta-btn {
  display: flex;
  align-items: center;
  background-color: var(--ink-black);
  color: var(--bg-paper);
  padding: 0 24px;
  font-family: var(--font-headline);
  font-size: 0.95rem;
  border-left: var(--border-thick);
}

.nav-cta-btn:hover {
  background-color: var(--signal-red);
  color: #FFFFFF;
}

/* 按钮通用规范 */
.btn-brutal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  font-family: var(--font-headline);
  font-size: 1.1rem;
  text-transform: uppercase;
  border: var(--border-thick);
  cursor: pointer;
  box-shadow: var(--shadow-button);
  letter-spacing: 0.5px;
  user-select: none;
  text-align: center;
}

.btn-black {
  background-color: var(--ink-black);
  color: var(--bg-paper);
}

.btn-black:hover {
  background-color: var(--signal-red);
  color: #FFFFFF;
}

.btn-paper {
  background-color: var(--bg-paper);
  color: var(--ink-black);
}

.btn-paper:hover {
  background-color: var(--ink-black);
  color: var(--bg-paper);
}

.btn-brutal:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink-black);
}

/* 标签 Chip */
.chip {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  border: 2px solid var(--ink-black);
  background-color: var(--bg-paper);
  color: var(--ink-black);
  margin-bottom: 12px;
}

.chip-red {
  background-color: var(--signal-red);
  color: #FFFFFF;
  border-color: var(--ink-black);
}

/* 主视觉区 Hero */
.hero-section {
  padding: 72px 0 64px 0;
  border-bottom: var(--border-heavy);
  background-color: var(--bg-paper);
}

.hero-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: var(--border-thick);
  border-bottom: var(--border-thick);
  padding: 8px 0;
  margin-bottom: 36px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-gray);
  text-transform: uppercase;
}

.hero-headline {
  font-family: var(--font-headline);
  font-size: 4.2rem;
  line-height: 1.05;
  text-transform: uppercase;
  color: var(--ink-black);
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.hero-headline span.red-underline {
  border-bottom: 6px solid var(--signal-red);
  display: inline-block;
  line-height: 0.95;
}

.hero-intro {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--ink-black);
  max-width: 860px;
  margin-bottom: 40px;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}

/* 核心优势卡片 3格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: var(--border-thick);
  background-color: var(--ink-black);
  gap: 2px;
}

.feature-card {
  background-color: var(--bg-paper);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-num {
  font-family: var(--font-headline);
  font-size: 3rem;
  color: var(--signal-red);
  line-height: 1;
  margin-bottom: 20px;
}

.feature-title {
  font-family: var(--font-headline);
  font-size: 1.4rem;
  margin-bottom: 14px;
  line-height: 1.2;
}

.feature-desc {
  color: var(--ink-gray);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 流媒体与 AI 支持图卡 */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: var(--border-thick);
  background-color: var(--ink-black);
  gap: 2px;
}

.media-ai-cell {
  background-color: var(--bg-paper);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  border-left: 4px solid transparent;
}

.media-ai-cell:hover {
  border-left-color: var(--signal-red);
  background-color: #ECE7DC;
}

.media-ai-cell h4 {
  font-family: var(--font-headline);
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.media-ai-cell p {
  font-size: 0.88rem;
  color: var(--ink-gray);
  line-height: 1.4;
}

/* 价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pricing-card {
  border: var(--border-heavy);
  background-color: var(--bg-paper);
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  background-color: #FAF8F2;
  border-width: 3px;
}

.pricing-header {
  padding: 28px;
  border-bottom: var(--border-thick);
  background-color: #E7E2D5;
}

.pricing-card.featured .pricing-header {
  background-color: var(--ink-black);
  color: var(--bg-paper);
}

.pricing-plan-name {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-currency {
  font-family: var(--font-headline);
  font-size: 1.5rem;
}

.pricing-amount {
  font-family: var(--font-headline);
  font-size: 3.2rem;
  line-height: 1;
}

.pricing-period {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-gray);
}

.pricing-card.featured .pricing-period {
  color: #CCC7BC;
}

.pricing-features {
  padding: 28px;
  list-style: none;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid #DCD6C7;
  font-size: 0.95rem;
}

.pricing-feature-item::before {
  content: "■";
  color: var(--signal-red);
  margin-right: 12px;
  font-size: 0.75rem;
}

.pricing-action {
  padding: 24px 28px 28px 28px;
  border-top: var(--border-thick);
}

/* FAQ 常见问题解答 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: var(--border-thick);
  background-color: var(--bg-paper);
  box-shadow: 4px 4px 0 var(--ink-black);
}

.faq-question {
  padding: 20px 24px;
  font-family: var(--font-headline);
  font-size: 1.15rem;
  background-color: #ECE7DC;
  border-bottom: 2px solid var(--ink-black);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 24px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink-black);
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  border: var(--border-thick);
  background-color: var(--bg-paper);
  padding: 28px;
  box-shadow: var(--shadow-button);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-text {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.review-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--ink-black);
  padding-top: 12px;
  font-size: 0.85rem;
  font-weight: 700;
}

.review-stars {
  color: var(--signal-red);
  letter-spacing: 2px;
}

/* 页脚 Footer - 严格仅有4个标题开新页 */
.site-footer {
  background-color: var(--ink-black);
  color: var(--bg-paper);
  padding: 48px 0 32px 0;
  border-top: var(--border-heavy);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 2px solid var(--bg-paper);
  margin-bottom: 40px;
}

.footer-link-item {
  display: block;
  padding: 28px 20px;
  text-align: center;
  font-family: var(--font-headline);
  font-size: 1.25rem;
  color: var(--bg-paper);
  border-right: 2px solid var(--bg-paper);
  text-transform: uppercase;
}

.footer-link-item:last-child {
  border-right: none;
}

.footer-link-item:hover {
  background-color: var(--signal-red);
  color: #FFFFFF;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #8C8474;
}

/* 资讯与内容页专属样式 */
.article-header {
  padding: 48px 0 24px 0;
  border-bottom: var(--border-heavy);
}

.article-body {
  padding: 48px 0;
  max-width: 900px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-body h2 {
  font-family: var(--font-headline);
  font-size: 1.8rem;
  margin: 40px 0 16px 0;
  border-left: 6px solid var(--signal-red);
  padding-left: 14px;
}

.article-body h3 {
  font-family: var(--font-headline);
  font-size: 1.35rem;
  margin: 28px 0 12px 0;
}

.article-body p {
  margin-bottom: 20px;
}

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

.article-body li {
  margin-bottom: 10px;
}

.article-callout {
  border: var(--border-thick);
  background-color: #E7E2D5;
  padding: 24px;
  box-shadow: 4px 4px 0 var(--ink-black);
  margin: 32px 0;
}

.article-callout h4 {
  font-family: var(--font-headline);
  margin-bottom: 10px;
}

.article-dofollow-link {
  font-weight: 700;
  color: var(--ink-black);
  background-color: #E2DBD0;
  border-bottom: 2px solid var(--signal-red);
  padding: 2px 6px;
  text-decoration: none;
}

.article-dofollow-link:hover {
  background-color: var(--signal-red);
  color: #FFFFFF;
}

/* 响应式媒体查询 @media */
@media (max-width: 992px) {
  .hero-headline {
    font-size: 3.2rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .media-ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-link-item:nth-child(2) {
    border-right: none;
  }
  .footer-link-item:nth-child(1),
  .footer-link-item:nth-child(2) {
    border-bottom: 2px solid var(--bg-paper);
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: auto;
    flex-direction: column;
  }
  .brand-logo {
    padding: 16px;
    border-right: none;
    border-bottom: var(--border-thick);
    justify-content: center;
  }
  .main-nav {
    flex-direction: column;
  }
  .nav-links {
    flex-direction: column;
  }
  .nav-item {
    border-left: none;
    border-bottom: var(--border-thick);
    padding: 14px 20px;
    justify-content: center;
  }
  .nav-cta-btn {
    border-left: none;
    padding: 16px 20px;
    justify-content: center;
  }
  .hero-headline {
    font-size: 2.4rem;
  }
  .hero-intro {
    font-size: 1.05rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn-brutal {
    width: 100%;
  }
  .media-ai-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    grid-template-columns: 1fr;
  }
  .footer-link-item {
    border-right: none !important;
    border-bottom: 2px solid var(--bg-paper);
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}