/* ==========================================================================
   聚盟云 JUMENG CLOUD - 瑞士国际主义排版风格 (Swiss Style) 原生样式表
   配色：米白纸感背景 #F7F6F2、纯墨黑文字 #111111、强调色橘红 #FF4A1F
   结构：严格 1px 黑色细线分隔每个板块，无卡片、无阴影、无圆角 (border-radius: 0)
   字体：超大标题 "Archivo Black", "Noto Sans SC 900", 正文 "IBM Plex Sans", 元信息 "IBM Plex Mono"
   ========================================================================== */

:root {
  --bg-paper: #F7F6F2;
  --text-black: #111111;
  --accent-orange: #FF4A1F;
  --border-line: 1px solid #111111;
  --border-line-light: 1px solid rgba(17, 17, 17, 0.2);
  --font-display: "Archivo Black", "Noto Sans SC", -apple-system, sans-serif;
  --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, Monaco, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* 严格无圆角 */
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-paper);
  color: var(--text-black);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
}

body {
  background-color: var(--bg-paper);
  color: var(--text-black);
  overflow-x: hidden;
  border-left: var(--border-line);
  border-right: var(--border-line);
  max-width: 1400px;
  margin: 0 auto;
}

/* 顶部元信息条 */
.top-meta-bar {
  border-bottom: var(--border-line);
  padding: 10px 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-paper);
}

.meta-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-orange);
  display: inline-block;
}

/* 瑞士极简主导航 */
.header-nav {
  border-bottom: var(--border-line);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
  background: var(--bg-paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand-box {
  padding: 16px 24px;
  border-right: var(--border-line);
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-brand-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-black);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links-wrap {
  display: flex;
  list-style: none;
}

.nav-links-wrap li {
  border-right: var(--border-line);
}

.nav-links-wrap a {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 20px;
  text-decoration: none;
  color: var(--text-black);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-links-wrap a:hover {
  background-color: var(--text-black);
  color: #FFFFFF;
}

.nav-cta-btn {
  background-color: var(--text-black);
  color: #FFFFFF !important;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 0 28px !important;
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: background-color 0.15s ease !important;
}

.nav-cta-btn:hover {
  background-color: var(--accent-orange) !important;
  color: #FFFFFF !important;
}

/* 主视觉 Hero 区域 */
.hero-section {
  border-bottom: var(--border-line);
  padding: 80px 24px 60px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
}

.hero-main-title {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9vw, 8.5rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  margin-bottom: 30px;
}

.hero-sub-block {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: var(--border-line);
  padding-left: 36px;
}

.hero-manifesto {
  font-size: 1.15rem;
  line-height: 1.65;
  color: #333333;
}

.hero-actions-swiss {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 36px;
}

.btn-swiss-black {
  display: inline-block;
  background: var(--text-black);
  color: #FFFFFF;
  padding: 18px 32px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  text-align: center;
  border: 2px solid var(--text-black);
  transition: all 0.15s ease;
}

.btn-swiss-black:hover {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: #FFFFFF;
}

.btn-swiss-outline {
  display: inline-block;
  background: transparent;
  color: var(--text-black);
  padding: 16px 32px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  text-align: center;
  border: 1px solid var(--text-black);
  transition: all 0.15s ease;
}

.btn-swiss-outline:hover {
  background: var(--text-black);
  color: #FFFFFF;
}

/* 跑马灯：等宽字体，展示节点延迟 */
.marquee-wrapper {
  border-bottom: var(--border-line);
  overflow: hidden;
  white-space: nowrap;
  background: var(--bg-paper);
  padding: 14px 0;
}

.marquee-content {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  animation: marqueeLoop 25s linear infinite;
}

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

/* 编号式编辑目录 (01–04) 功能区 */
.features-editorial {
  border-bottom: var(--border-line);
}

.editorial-header {
  padding: 24px;
  border-bottom: var(--border-line);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
}

.editorial-row {
  border-bottom: var(--border-line);
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 100px 1.5fr 2fr;
  align-items: baseline;
  gap: 24px;
  transition: background-color 0.2s ease, color 0.2s ease;
  cursor: pointer;
}

.editorial-row:last-child {
  border-bottom: none;
}

.row-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: #555555;
  transition: color 0.2s ease;
}

.row-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 900;
  line-height: 1.2;
}

.row-desc {
  font-size: 1rem;
  line-height: 1.6;
  color: #444444;
  transition: color 0.2s ease;
}

/* 通栏行悬停反色为黑底，编号变橘红 */
.editorial-row:hover {
  background-color: var(--text-black);
  color: #FFFFFF;
}

.editorial-row:hover .row-num {
  color: var(--accent-orange);
}

.editorial-row:hover .row-desc {
  color: #CCCCCC;
}

/* 定价：严格 3 列表格 */
.pricing-section-swiss {
  border-bottom: var(--border-line);
}

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

.price-col {
  border-right: var(--border-line);
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 520px;
}

.price-col:last-child {
  border-right: none;
}

.price-col.featured {
  background: #EFEFEA;
}

.price-tag-mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.price-plan-name {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.price-big-number {
  font-family: var(--font-mono);
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1;
  margin: 24px 0 32px 0;
}

.price-spec-list {
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border-top: var(--border-line-light);
  padding-top: 16px;
  margin-bottom: 30px;
}

.price-spec-list li {
  padding: 8px 0;
  border-bottom: 1px dashed rgba(17,17,17,0.15);
  display: flex;
  justify-content: space-between;
}

/* 流媒体与 AI 支持矩阵 (严格瑞士网格) */
.support-section-swiss {
  border-bottom: var(--border-line);
  padding: 40px 24px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
}

.support-tags-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.support-spec-cell {
  border: var(--border-line);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.support-spec-cell:hover {
  background-color: var(--accent-orange);
  color: #FFFFFF;
  border-color: var(--accent-orange);
}

/* 疑难释义 (FAQ) */
.faq-section-swiss {
  border-bottom: var(--border-line);
}

.faq-row {
  border-bottom: var(--border-line);
  padding: 24px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.faq-row:last-child {
  border-bottom: none;
}

.faq-row-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-row-head h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 900;
}

.faq-sign {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 900;
  transition: transform 0.2s ease;
}

.faq-row.active .faq-sign {
  transform: rotate(45deg);
  color: var(--accent-orange);
}

.faq-row-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  font-size: 0.98rem;
  line-height: 1.7;
  color: #444444;
}

.faq-row-body-inner {
  padding-top: 16px;
}

/* 评论区 (Editorial Quotes) */
.reviews-section-swiss {
  border-bottom: var(--border-line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.review-col {
  border-right: var(--border-line);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-col:last-child {
  border-right: none;
}

.review-quote {
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 24px;
  color: #222222;
}

.review-byline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: #666666;
}

/* 页脚：巨型描边字“聚盟云”与四链接 */
.footer-swiss {
  padding: 60px 24px 40px 24px;
  background: var(--bg-paper);
}

.giant-stroked-brand {
  font-family: var(--font-display);
  font-size: clamp(4rem, 15vw, 13rem);
  font-weight: 900;
  text-align: center;
  line-height: 0.85;
  letter-spacing: -0.05em;
  -webkit-text-stroke: 2px #111111;
  color: transparent;
  user-select: none;
  margin-bottom: 40px;
  transition: color 0.3s ease, -webkit-text-stroke-color 0.3s ease;
}

.giant-stroked-brand:hover {
  color: var(--text-black);
}

.footer-nav-bar {
  border-top: var(--border-line);
  border-bottom: var(--border-line);
  padding: 16px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links-swiss {
  display: flex;
  gap: 28px;
  list-style: none;
}

.footer-links-swiss a {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-black);
  text-transform: uppercase;
  transition: color 0.15s ease;
}

.footer-links-swiss a:hover {
  color: var(--accent-orange);
}

.footer-meta-copy {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #666666;
  text-align: center;
  margin-top: 24px;
}

/* 滚动显现动画 (IntersectionObserver) */
.reveal-fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式媒体查询 */
@media (max-width: 992px) {
  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 20px;
  }
  .hero-sub-block {
    border-left: none;
    border-top: var(--border-line);
    padding-left: 0;
    padding-top: 24px;
  }
  .editorial-row {
    grid-template-columns: 60px 1fr;
  }
  .row-desc {
    grid-column: span 2;
  }
  .pricing-table-grid,
  .reviews-section-swiss {
    grid-template-columns: 1fr;
  }
  .price-col,
  .review-col {
    border-right: none;
    border-bottom: var(--border-line);
  }
  .support-section-swiss {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links-wrap {
    display: none;
  }
  .hero-main-title {
    font-size: 3.5rem;
  }
  .footer-links-swiss {
    flex-wrap: wrap;
    gap: 14px;
  }
}