/* ==========================================================================
   红杏云 (HongXing Cloud) - 瑞士理性主义朱砂红字体排印设计系统
   Swiss-Rationalist Cinnabar-Contrast Typographic UI Design
   域名: https://hongxingdl.sbs
   配色: 纯白档案纸白 (#fafafa) | 铅字炭黑 (#0a0a0c) | 古典朱砂红 (#e63946)
   原则: 纯平无投影、锋利1px发丝线、巨型冷峻无衬线字体、等宽遥测报表、0ms朱砂吸附
   ========================================================================== */

/* ---------------- 调色板与主题变量 ---------------- */
:root, [data-theme="light"] {
  --color-scheme: light;
  
  /* 瑞士学派色彩 */
  --bg-body: #fafafa;
  --bg-surface: #ffffff;
  --bg-subtle: #f2f2f4;
  --bg-accent: #0a0a0c;
  
  --text-main: #0a0a0c;
  --text-secondary: #3e3e46;
  --text-muted: #72727e;
  --text-inverse: #fafafa;

  /* 核心朱砂红 */
  --cinnabar: #e63946;
  --cinnabar-hover: #c92a37;
  --cinnabar-light: rgba(230, 57, 70, 0.08);

  /* 极简1px发丝线 - 绝对平坦，严禁阴影 */
  --hairline: #0a0a0c;
  --hairline-light: #e0e0e4;
  --hairline-mid: #b8b8c2;

  --nav-bg: rgba(250, 250, 250, 0.94);
  --header-border: #0a0a0c;

  /* 字体族 */
  --font-grotesk: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --color-scheme: dark;
  
  --bg-body: #0a0a0c;
  --bg-surface: #121216;
  --bg-subtle: #1a1a20;
  --bg-accent: #fafafa;
  
  --text-main: #fafafa;
  --text-secondary: #c2c2ce;
  --text-muted: #848494;
  --text-inverse: #0a0a0c;

  --cinnabar: #e63946;
  --cinnabar-hover: #ff4d5e;
  --cinnabar-light: rgba(230, 57, 70, 0.16);

  --hairline: #383842;
  --hairline-light: #24242c;
  --hairline-mid: #525260;

  --nav-bg: rgba(10, 10, 12, 0.94);
  --header-border: #383842;
}

/* ---------------- 基础排版规范 ---------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* 瑞士现代主义：杜绝圆角，极致锋利几何 */
  box-shadow: none !important;  /* 纯平无投影：杜绝软阴影 */
}

html {
  font-family: var(--font-grotesk);
  font-size: 16px;
  line-height: 1.55;
  background-color: var(--bg-body);
  color: var(--text-main);
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  transition: background-color 0.2s ease, color 0.2s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---------------- 容器与网格 ---------------- */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
}

.container-narrow {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 32px;
}

.grid-border {
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
}

/* ---------------- 头部导航栏 (Header) ---------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: var(--nav-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--header-border);
}

.header-inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  height: 68px;
}

.brand-block {
  display: flex;
  align-items: center;
  padding: 0 24px 0 0;
  border-right: 1px solid var(--hairline-light);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-main);
}

.brand-logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-dark {
  display: none;
}

[data-theme="dark"] .logo-light {
  display: none;
}

[data-theme="dark"] .logo-dark {
  display: block;
}

.brand-stamp {
  background-color: var(--cinnabar);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 6px;
  letter-spacing: 0.05em;
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: stretch;
  list-style: none;
  flex-grow: 1;
  padding-left: 12px;
}

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

.nav-link {
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: var(--font-grotesk);
  letter-spacing: -0.01em;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--cinnabar);
  background-color: var(--bg-subtle);
  border-bottom-color: var(--cinnabar);
}

.nav-link.active-link {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.nav-link-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-right: 5px;
}

/* 推荐资讯高亮强调 */
.nav-link-highlight {
  color: var(--cinnabar);
  font-weight: 800;
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-left: 20px;
  border-left: 1px solid var(--hairline-light);
}

/* 瑞士学派昼夜切换器 */
.theme-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  background-color: transparent;
  border: 1px solid var(--hairline);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0ms, color 0ms;
}

.theme-switch-btn:hover {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-color: var(--cinnabar);
}

.theme-switch-btn svg {
  width: 14px;
  height: 14px;
}

.icon-sun, .icon-moon {
  display: inline-block;
}

[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }

/* 移动端菜单切换 */
.menu-toggle-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--hairline);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text-main);
}

/* ---------------- 瑞士排版通用 CTA 按钮 ---------------- */
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  font-family: var(--font-grotesk);
  cursor: pointer;
  border: 1px solid var(--hairline);
  white-space: nowrap;
  transition: all 0ms; /* 0ms instant snap */
}

.btn-cta-primary {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-color: var(--cinnabar);
}

.btn-cta-primary:hover {
  background-color: #0a0a0c;
  color: #ffffff;
  border-color: #0a0a0c;
}

[data-theme="dark"] .btn-cta-primary:hover {
  background-color: #ffffff;
  color: #0a0a0c;
  border-color: #ffffff;
}

.btn-cta-outline {
  background-color: transparent;
  color: var(--text-main);
  border-color: var(--hairline);
}

.btn-cta-outline:hover {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-color: var(--cinnabar);
}

.btn-cta-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
}

/* ---------------- 主视觉区 (Hero Section) ---------------- */
.hero-section {
  border-bottom: 2px solid var(--hairline);
  background-color: var(--bg-surface);
  position: relative;
}

.hero-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--hairline-light);
  padding: 10px 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.hero-meta-tag {
  color: var(--cinnabar);
  font-weight: 700;
}

.hero-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  border-left: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
  margin: 0;
}

.hero-main-col {
  padding: 70px 48px;
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--cinnabar);
  margin-bottom: 16px;
  display: block;
}

/* 巨型冷峻中文字体 Headline (包含品牌名: 红杏云) */
.hero-headline {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.04em;
  color: var(--text-main);
  margin-bottom: 24px;
}

.hero-headline .highlight-brand {
  color: var(--cinnabar);
  text-decoration: underline;
  text-decoration-thickness: 4px;
  text-underline-offset: 8px;
}

/* 简介区 */
.hero-intro {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 620px;
}

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

/* 右侧：理性主义遥测数据牌 */
.hero-sidebar-col {
  background-color: var(--bg-subtle);
  display: flex;
  flex-direction: column;
}

.telemetry-card-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  background-color: var(--bg-surface);
}

.telemetry-live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: #10b981;
  margin-right: 6px;
}

.telemetry-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex-grow: 1;
}

.telemetry-metric {
  border-bottom: 1px dashed var(--hairline-mid);
  padding-bottom: 12px;
}

.telemetry-metric:last-child {
  border-bottom: none;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-main);
  margin-top: 4px;
}

.metric-foot {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ---------------- 区块标题标准 (Section Headers) ---------------- */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 2px solid var(--hairline);
  padding-bottom: 18px;
  margin-bottom: 40px;
}

.section-head-left {
  max-width: 720px;
}

.section-mono-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--cinnabar);
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 6px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-main);
  line-height: 1.2;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.6;
}

/* ---------------- 核心优势 (3个图文卡片) ---------------- */
.cards-trio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}

.trio-card {
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 40px 32px;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background-color 0ms, color 0ms; /* 0ms snap */
}

/* 0ms Cinnabar-snap micro-interaction */
.trio-card:hover {
  background-color: var(--cinnabar);
  color: #ffffff;
}

.trio-card:hover .trio-index,
.trio-card:hover .trio-title,
.trio-card:hover .trio-desc,
.trio-card:hover .trio-bullet-item {
  color: #ffffff !important;
}

.trio-card:hover .trio-bullet-item {
  border-color: rgba(255, 255, 255, 0.3) !important;
}

.trio-index {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--cinnabar);
  margin-bottom: 24px;
}

.trio-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 14px;
}

.trio-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
  flex-grow: 1;
}

.trio-bullets {
  list-style: none;
  border-top: 1px solid var(--hairline-light);
  padding-top: 16px;
}

.trio-bullet-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 6px 0;
}

/* ---------------- 流媒体图卡 & AI 支持图卡 ---------------- */
.duo-specialty-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
}

.specialty-col {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
}

.specialty-col:first-child {
  border-right: 1px solid var(--hairline);
}

.specialty-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 8px;
  border: 1px solid var(--hairline);
  color: var(--text-main);
  margin-bottom: 20px;
  align-self: flex-start;
}

.specialty-title {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 12px;
}

.specialty-intro {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.matrix-tags {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 30px;
}

.matrix-tag-item {
  border: 1px solid var(--hairline-light);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-subtle);
  transition: all 0ms;
}

.matrix-tag-item:hover {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-color: var(--cinnabar);
}

.matrix-tag-status {
  color: #10b981;
  font-size: 0.7rem;
}

.matrix-tag-item:hover .matrix-tag-status {
  color: #ffffff;
}

/* 规格等宽小报 */
.telemetry-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  padding-top: 20px;
  margin-top: auto;
}

.telemetry-sub-item {
  font-family: var(--font-mono);
}

.telemetry-sub-val {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--cinnabar);
}

.telemetry-sub-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ---------------- 节点实时延迟遥测表 (Monospace Telemetry Table) ---------------- */
.table-container {
  border: 1px solid var(--hairline);
  overflow-x: auto;
  background-color: var(--bg-surface);
}

.telemetry-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  text-align: left;
}

.telemetry-table th {
  background-color: var(--bg-subtle);
  padding: 14px 20px;
  font-weight: 800;
  color: var(--text-main);
  border-bottom: 2px solid var(--hairline);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem;
}

.telemetry-table td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--hairline-light);
  color: var(--text-secondary);
  transition: all 0ms; /* 0ms instant chromatic snap */
}

/* 0ms Cinnabar-snap micro-interaction on rows */
.telemetry-table tbody tr:hover td {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-bottom-color: var(--cinnabar);
}

.telemetry-table tbody tr:hover .status-badge-mono {
  background-color: #ffffff;
  color: var(--cinnabar);
}

.status-badge-mono {
  display: inline-block;
  padding: 2px 6px;
  font-size: 0.7rem;
  font-weight: 800;
  background-color: rgba(16, 185, 129, 0.15);
  color: #059669;
}

/* ---------------- 套餐价格对比表 (参考网上真实套餐价格) ---------------- */
.pricing-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
  font-family: var(--font-mono);
}

.duration-btn {
  background-color: var(--bg-surface);
  border: 1px solid var(--hairline);
  padding: 10px 24px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--text-main);
  cursor: pointer;
  margin-left: -1px;
  transition: all 0ms;
}

.duration-btn.active {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-color: var(--cinnabar);
  z-index: 2;
}

.pricing-table-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
  background-color: var(--bg-surface);
}

.price-card {
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--bg-surface);
}

.price-card-popular {
  background-color: var(--bg-surface);
  border: 2px solid var(--cinnabar);
  margin: -1px;
  z-index: 3;
}

.popular-flag {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--cinnabar);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 12px;
  letter-spacing: 0.05em;
}

.price-tier-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.price-tier-name {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.price-tier-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  min-height: 42px;
}

.price-display {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-bottom: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--hairline-light);
  font-family: var(--font-mono);
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
}

.price-digits {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-main);
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.price-specs {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
}

.price-spec-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed var(--hairline-light);
  font-size: 0.9rem;
}

.spec-key {
  color: var(--text-secondary);
}

.spec-val {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--text-main);
}

/* ---------------- 用户真实评价 (Testimonials) ---------------- */
.reviews-swiss-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
  background-color: var(--bg-surface);
}

.review-item {
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
}

.review-quote-text {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-meta {
  border-top: 1px solid var(--hairline-light);
  padding-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.review-author-name {
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--text-main);
}

.review-author-role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.review-star-mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--cinnabar);
}

/* ---------------- 常见问题解答 (FAQ) ---------------- */
.faq-swiss-wrapper {
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
}

.faq-entry {
  border-bottom: 1px solid var(--hairline);
  padding: 26px 32px;
  transition: background-color 0ms;
}

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

.faq-entry-q {
  display: flex;
  align-items: baseline;
  gap: 16px;
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.faq-entry-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cinnabar);
  font-weight: 800;
}

.faq-entry-a {
  padding-left: 36px;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ---------------- 底部呼吁横幅 CTA Banner ---------------- */
.banner-cinnabar {
  background-color: var(--cinnabar);
  color: #ffffff;
  padding: 60px 48px;
  border: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.banner-cinnabar-title {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 10px;
}

.banner-cinnabar-desc {
  font-size: 1.05rem;
  opacity: 0.92;
  line-height: 1.6;
}

.btn-white-block {
  background-color: #ffffff;
  color: var(--cinnabar);
  border: 2px solid #ffffff;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 900;
  white-space: nowrap;
}

.btn-white-block:hover {
  background-color: #0a0a0c;
  color: #ffffff;
  border-color: #0a0a0c;
}

/* ---------------- 页脚 (Footer) ---------------- */
/* 严格遵循用户指令：页脚只保留这四个标题，内容打开新的页面展示 */
.footer {
  background-color: #0a0a0c;
  color: #848494;
  border-top: 2px solid var(--hairline);
  padding: 60px 0 35px;
  margin-top: auto;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-bottom: 35px;
  flex-wrap: wrap;
}

.footer-link {
  color: #fafafa;
  font-size: 1rem;
  font-weight: 800;
  font-family: var(--font-grotesk);
  letter-spacing: 0.02em;
  padding: 6px 14px;
  border: 1px solid transparent;
  transition: all 0ms;
}

.footer-link:hover {
  color: #ffffff;
  background-color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid #222228;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #626270;
}

.footer-bottom a {
  color: #9292a4;
  text-decoration: underline;
}

.footer-bottom a:hover {
  color: var(--cinnabar);
}

/* ---------------- 独立子页面排版 (About, Terms, Privacy, News) ---------------- */
.page-title-block {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--hairline);
  padding: 60px 0 40px;
}

.page-colossal-title {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-main);
  margin-bottom: 12px;
}

.page-lead-mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cinnabar);
  font-weight: 700;
  margin-bottom: 10px;
  display: block;
}

.article-content {
  padding: 60px 0 80px;
}

.swiss-article-card {
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
  padding: 48px 44px;
  margin-bottom: 32px;
}

.swiss-article-card h2 {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--hairline);
}

.swiss-article-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 28px 0 12px;
}

.swiss-article-card p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.swiss-article-card ul {
  padding-left: 24px;
  margin-bottom: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.swiss-callout {
  border-left: 4px solid var(--cinnabar);
  background-color: var(--bg-subtle);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 0.95rem;
  color: var(--text-main);
}

/* 资讯中心文章卡片列表 */
.news-feed-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.news-card {
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
  padding: 36px;
  transition: all 0ms;
}

.news-card:hover {
  border-color: var(--cinnabar);
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.news-tag-cinnabar {
  background-color: var(--cinnabar);
  color: #ffffff;
  padding: 2px 8px;
  font-weight: 800;
}

.news-card-title {
  font-size: 1.55rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.3;
}

.news-card-title a:hover {
  color: var(--cinnabar);
}

.news-card-summary {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ---------------- 深度长篇科普文章专用排版 (TOC, FAQ, 相关阅读) ---------------- */
.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--hairline-light);
  padding-bottom: 16px;
  margin-bottom: 30px;
}

.article-meta-bar span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录 (Table of Contents) */
.article-toc {
  background-color: var(--bg-subtle);
  border: 1px solid var(--hairline);
  padding: 28px 32px;
  margin-bottom: 40px;
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 2px solid var(--cinnabar);
  padding-bottom: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-item a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  transition: all 0ms;
}

.toc-item a:hover {
  color: var(--cinnabar);
  transform: translateX(4px);
}

.toc-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cinnabar);
  font-weight: 800;
}

/* 文章正文强化 */
.article-body h2 {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin: 44px 0 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
  scroll-margin-top: 90px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 30px 0 12px;
  scroll-margin-top: 90px;
}

.article-body p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  padding-left: 24px;
  margin-bottom: 22px;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.article-body strong {
  color: var(--text-main);
  font-weight: 800;
}

.article-highlight-box {
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
  border-left: 4px solid var(--cinnabar);
  padding: 24px 28px;
  margin: 30px 0;
}

.article-highlight-box h4 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

/* 官方首页内链专属卡片 */
.brand-internal-link-card {
  border: 2px solid var(--cinnabar);
  background-color: var(--bg-surface);
  padding: 32px;
  margin: 36px 0;
  position: relative;
}

.brand-internal-link-card .brand-tag {
  background-color: var(--cinnabar);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 12px;
}

.brand-internal-link-card h3 {
  margin-top: 0;
  font-size: 1.45rem;
  color: var(--text-main);
}

.brand-internal-link-card a.site-direct-link {
  color: var(--cinnabar);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 相关阅读区域 (Related Reading) */
.related-reading-section {
  border-top: 2px solid var(--hairline);
  padding-top: 40px;
  margin-top: 60px;
}

.related-reading-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  border: 1px solid var(--hairline);
  background-color: var(--bg-surface);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all 0ms;
}

.related-card:hover {
  background-color: var(--cinnabar);
  color: #ffffff;
  border-color: var(--cinnabar);
}

.related-card:hover h4,
.related-card:hover p,
.related-card:hover .related-date {
  color: #ffffff !important;
}

.related-card h4 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.related-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------------- 响应式媒体查询适配 (@media) ---------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-main-col {
    border-right: none;
    border-bottom: 1px solid var(--hairline);
    padding: 50px 32px;
  }
  .cards-trio-grid,
  .pricing-table-grid,
  .reviews-swiss-grid {
    grid-template-columns: 1fr;
  }
  .duo-specialty-grid {
    grid-template-columns: 1fr;
  }
  .specialty-col:first-child {
    border-right: none;
    border-bottom: 1px solid var(--hairline);
  }
}

@media (max-width: 768px) {
  .container, .container-narrow {
    padding: 0 16px;
  }

  .header-inner {
    height: 60px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    flex-direction: column;
    padding: 16px;
    border-bottom: 2px solid var(--hairline);
    z-index: 1000;
  }

  .nav-links.active-menu {
    display: flex;
  }

  .nav-link {
    padding: 12px 14px;
    border-bottom: 1px solid var(--hairline-light);
  }

  .menu-toggle-btn {
    display: inline-flex;
  }

  .hero-headline {
    font-size: 2.3rem;
  }

  .hero-main-col {
    padding: 36px 16px;
  }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .banner-cinnabar {
    flex-direction: column;
    padding: 36px 20px;
    text-align: center;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
}