/* ==========================================================================
   BoostNet 网络情报中心 - 样式表 (style.css)
   深色高级科技 · 信息面板 · 线路状态 · 响应式系统
   ========================================================================== */

:root {
  --bg-primary: #080E17;
  --bg-secondary: #0E1724;
  --bg-panel: #132033;
  --bg-panel-light: #18283E;
  
  --text-primary: #F8FAFC;
  --text-body: #C4D0DD;
  --text-muted: #8FA1B5;
  
  --color-blue: #3C82F6;
  --color-cyan: #3DD9C5;
  --color-green: #55D69E;
  
  --border-color: rgba(140, 165, 190, 0.18);
  --border-focus: rgba(60, 130, 246, 0.45);
  --border-highlight: linear-gradient(135deg, rgba(60, 130, 246, 0.6), rgba(61, 217, 197, 0.6));
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --container-max: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-primary);
  color: var(--text-body);
}

body {
  font-family: var(--font-family);
  line-height: 1.68;
  background-color: var(--bg-primary);
  color: var(--text-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-cyan);
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-blue);
  color: #FFFFFF;
  border-color: rgba(60, 130, 246, 0.8);
}

.btn-primary:hover {
  background: #2563EB;
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(60, 130, 246, 0.25);
}

.btn-secondary {
  background: var(--bg-panel-light);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: #1E3350;
  border-color: var(--color-blue);
  color: #FFFFFF;
}

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

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

/* 状态徽标与编号 */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(85, 214, 158, 0.1);
  border: 1px solid rgba(85, 214, 158, 0.28);
  border-radius: var(--radius-sm);
  color: var(--color-green);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-green);
}

.status-badge-blue {
  background: rgba(60, 130, 246, 0.1);
  border-color: rgba(60, 130, 246, 0.28);
  color: var(--color-blue);
}

.status-badge-blue .status-dot {
  background-color: var(--color-blue);
}

.intel-num {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-cyan);
  letter-spacing: 1px;
}

/* ==========================================================================
   导航栏 Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(8, 14, 23, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: 76px;
  display: flex;
  align-items: center;
}

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

.brand-wrapper {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.brand-subtitle {
  font-size: 0.76rem;
  color: var(--color-cyan);
  margin-top: 3px;
  font-weight: 500;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-body);
  padding: 6px 4px;
  position: relative;
  font-weight: 500;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-blue);
}

.header-action {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 76px;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 24px;
  flex-direction: column;
  gap: 16px;
  z-index: 99;
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav .nav-link {
  font-size: 1rem;
  padding: 10px 0;
  border-bottom: 1px solid rgba(140, 165, 190, 0.08);
}

/* ==========================================================================
   Hero 情报摘要首页
   ========================================================================== */
.hero-intel {
  padding: 56px 0 36px 0;
  background: radial-gradient(circle at 50% 0%, rgba(60, 130, 246, 0.08) 0%, rgba(8, 14, 23, 0) 70%);
  border-bottom: 1px solid var(--border-color);
}

.hero-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(140, 165, 190, 0.12);
}

.hero-meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.intel-badge {
  font-size: 0.8rem;
  color: var(--color-cyan);
  background: rgba(61, 217, 197, 0.08);
  border: 1px solid rgba(61, 217, 197, 0.2);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.intel-year {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 1px;
}

.hero-main-title {
  font-size: 2.5rem;
  line-height: 1.25;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero-main-title span {
  display: block;
  color: var(--color-cyan);
}

.hero-sub-title {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  font-weight: 400;
}

.hero-page-h1 {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 500;
  padding: 10px 14px;
  background: var(--bg-panel);
  border-left: 3px solid var(--color-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 36px;
}

/* 5 个不同宽度的信息区块 (快速摘要) */
.hero-summary-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 0.9fr 1.5fr 1.3fr;
  gap: 14px;
  margin-top: 28px;
}

.summary-intel-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 16px 18px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.summary-intel-box:hover {
  border-color: rgba(60, 130, 246, 0.4);
  background: var(--bg-panel-light);
}

.summary-intel-box .box-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.summary-intel-box .box-value {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-primary);
}

.summary-intel-box .box-tag {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--color-green);
}

/* ==========================================================================
   首页通用章节与版块
   ========================================================================== */
.section-block {
  padding: 56px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.section-header {
  margin-bottom: 32px;
}

.section-intel-no {
  font-size: 0.85rem;
  color: var(--color-cyan);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-h2 {
  font-size: 1.75rem;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.direct-answer {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--color-blue);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

/* 01 / 网络概况 信息面板清单 */
.intel-panel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.intel-panel-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition);
}

.intel-panel-card:hover {
  border-color: rgba(60, 130, 246, 0.4);
  background: var(--bg-panel-light);
}

.intel-panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(140, 165, 190, 0.1);
}

.intel-panel-body {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
}

/* 02 / 三网 IEPL 简洁线路图示 */
.carrier-pipeline {
  display: grid;
  grid-template-columns: 1fr auto 1.3fr;
  align-items: center;
  gap: 20px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
}

.carrier-sources {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.carrier-node {
  background: var(--bg-panel-light);
  border: 1px solid rgba(140, 165, 190, 0.16);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.carrier-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.carrier-tag {
  font-size: 0.78rem;
  color: var(--color-cyan);
}

.carrier-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-blue);
  font-size: 1.5rem;
  padding: 0 10px;
}

.carrier-target {
  background: var(--bg-panel-light);
  border: 1px solid rgba(60, 130, 246, 0.4);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: left;
}

.carrier-target-title {
  font-size: 1.15rem;
  color: var(--color-cyan);
  font-weight: 700;
  margin-bottom: 8px;
}

.carrier-target-desc {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
}

.section-explain-text {
  font-size: 0.96rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* 03 / 跨网注意事项 (网络提示) */
.network-note-box {
  background: rgba(60, 130, 246, 0.06);
  border: 1px solid rgba(60, 130, 246, 0.3);
  border-left: 4px solid var(--color-cyan);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin-top: 16px;
}

.network-note-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.network-note-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.network-note-content {
  font-size: 0.94rem;
  color: var(--text-body);
  line-height: 1.68;
}

/* 04 / AnyTLS 协议流程 */
.protocol-flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.flow-step-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  text-align: center;
}

.flow-step-num {
  font-size: 0.8rem;
  color: var(--color-cyan);
  margin-bottom: 6px;
  font-weight: 600;
}

.flow-step-title {
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.flow-step-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 05 / 长期使用观察 */
.obs-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.obs-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
}

.obs-title {
  font-size: 0.82rem;
  color: var(--color-cyan);
  margin-bottom: 8px;
  font-weight: 600;
}

.obs-val {
  font-size: 1.15rem;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 8px;
}

.obs-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 06 / 晚高峰表现 状态面板 */
.evening-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-top: 20px;
}

.evening-indicators {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(140, 165, 190, 0.12);
}

.indicator-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.indicator-name {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.indicator-status {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 07 / AI 与流媒体 */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.unlock-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.unlock-box-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(140, 165, 190, 0.1);
  display: flex;
  justify-content: space-between;
}

.unlock-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.unlock-tag {
  background: var(--bg-panel-light);
  border: 1px solid rgba(140, 165, 190, 0.2);
  color: var(--text-primary);
  font-size: 0.84rem;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
}

.unlock-note {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 08 / 客户端选择 */
.client-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.client-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
}

.client-card.preferred {
  border-color: rgba(60, 130, 246, 0.5);
  background: linear-gradient(180deg, var(--bg-panel-light) 0%, var(--bg-panel) 100%);
}

.client-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.client-title {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 700;
}

.client-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.client-points li {
  font-size: 0.92rem;
  color: var(--text-body);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.client-points li::before {
  content: "•";
  color: var(--color-cyan);
  font-weight: bold;
}

/* ==========================================================================
   09 / 套餐价格：“套餐情报板”
   ========================================================================== */
.plans-board {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 28px;
}

.plan-row {
  display: grid;
  grid-template-columns: 90px 1fr 280px;
  align-items: center;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: var(--transition);
}

.plan-row:hover {
  background: var(--bg-panel-light);
  border-color: rgba(60, 130, 246, 0.4);
}

/* 标准套餐强调：用蓝色 + 青色细边框 */
.plan-row.plan-featured {
  background: var(--bg-panel-light);
  border: 1px solid transparent;
  background-image: linear-gradient(var(--bg-panel-light), var(--bg-panel-light)), linear-gradient(135deg, var(--color-blue), var(--color-cyan));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: 0 6px 20px rgba(60, 130, 246, 0.1);
  position: relative;
}

.plan-row-no {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-cyan);
  letter-spacing: 1px;
}

.plan-row-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-right: 20px;
}

.plan-row-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.plan-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.plan-traffic-badge {
  font-size: 0.82rem;
  background: rgba(60, 130, 246, 0.12);
  color: var(--color-blue);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.plan-featured-badge {
  font-size: 0.78rem;
  background: rgba(61, 217, 197, 0.15);
  color: var(--color-cyan);
  border: 1px solid rgba(61, 217, 197, 0.35);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-row-action {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
}

.plan-price-wrap {
  text-align: right;
}

.plan-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.plan-sub-price {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   10 / BoostNet 深度评测 预告看板
   ========================================================================== */
.review-preview-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-top: 20px;
}

.review-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(140, 165, 190, 0.1);
}

.review-preview-title {
  font-size: 1.35rem;
  color: var(--text-primary);
  font-weight: 700;
}

.review-original-quote {
  background: var(--bg-panel-light);
  border-left: 4px solid var(--color-blue);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.review-original-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.review-topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.review-topic-item {
  font-size: 0.88rem;
  color: var(--text-body);
  background: rgba(14, 23, 36, 0.7);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(140, 165, 190, 0.1);
}

/* ==========================================================================
   11 / 使用指南：“情报条目目录”
   ========================================================================== */
.guide-catalog {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.catalog-item {
  display: grid;
  grid-template-columns: 60px 110px 1fr 140px 130px;
  align-items: center;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: var(--transition);
}

.catalog-item:hover {
  background: var(--bg-panel-light);
  border-color: rgba(60, 130, 246, 0.4);
}

.catalog-no {
  font-size: 0.92rem;
  color: var(--color-cyan);
  font-weight: 600;
}

.catalog-cat {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.catalog-main {
  padding-right: 20px;
}

.catalog-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.catalog-title a {
  color: var(--text-primary);
}

.catalog-title a:hover {
  color: var(--color-cyan);
}

.catalog-excerpt {
  font-size: 0.84rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 580px;
}

.catalog-readtime {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: right;
  padding-right: 14px;
}

.catalog-action {
  text-align: right;
}

/* ==========================================================================
   12 / 常见问题 FAQ
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: rgba(60, 130, 246, 0.4);
  background: var(--bg-panel-light);
}

.faq-question {
  padding: 18px 22px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--color-cyan);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
  content: "−";
  color: var(--color-blue);
}

.faq-answer {
  padding: 0 22px 20px 22px;
  font-size: 0.94rem;
  color: var(--text-body);
  line-height: 1.7;
  border-top: 1px solid rgba(140, 165, 190, 0.08);
  padding-top: 16px;
}

/* ==========================================================================
   文章详情页排版规范
   ========================================================================== */
.article-header {
  padding: 44px 0 28px 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.breadcrumb-separator {
  color: rgba(140, 165, 190, 0.4);
}

.article-h1 {
  font-size: 2.1rem;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 0.86rem;
  color: var(--text-muted);
  padding: 12px 16px;
  background: var(--bg-panel);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(140, 165, 190, 0.1);
}

.article-meta-bar span strong {
  color: var(--text-primary);
  font-weight: 500;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 40px 0 60px 0;
}

.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-body);
}

.quick-conclusion-box {
  background: rgba(60, 130, 246, 0.08);
  border: 1px solid rgba(60, 130, 246, 0.28);
  border-left: 4px solid var(--color-cyan);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}

.quick-conclusion-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.toc-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: sticky;
  top: 96px;
}

.toc-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(140, 165, 190, 0.12);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
}

.toc-list a {
  color: var(--text-muted);
  display: block;
  line-height: 1.45;
}

.toc-list a:hover {
  color: var(--color-cyan);
}

.article-content h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
  font-weight: 700;
  margin: 40px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(140, 165, 190, 0.15);
}

.article-content h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 600;
  margin: 28px 0 12px 0;
}

.article-content p {
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
}

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

.article-content blockquote {
  background: var(--bg-panel);
  border-left: 4px solid var(--color-blue);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-primary);
}

.article-cta-box {
  background: linear-gradient(135deg, var(--bg-panel) 0%, var(--bg-panel-light) 100%);
  border: 1px solid rgba(60, 130, 246, 0.3);
  padding: 28px;
  border-radius: var(--radius-lg);
  margin: 36px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.article-cta-info h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin: 0 0 6px 0;
}

.article-cta-info p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
}

.related-articles-section {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.related-articles-title {
  font-size: 1.3rem;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 20px;
}

/* ==========================================================================
   分类页与信息页规范
   ========================================================================== */
.category-header {
  padding: 44px 0 32px 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.category-h1 {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.category-intro {
  font-size: 1.02rem;
  color: var(--text-body);
  max-width: 800px;
  line-height: 1.7;
}

.static-page-container {
  padding: 48px 0 70px 0;
  max-width: 880px;
}

/* ==========================================================================
   Footer 页脚 (紧凑规范 250-320px)
   ========================================================================== */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0 24px 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

.footer-brand h4 {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-col h5 {
  font-size: 0.92rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 14px;
}

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

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

.footer-links a:hover {
  color: var(--color-cyan);
}

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid rgba(140, 165, 190, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   响应式断点适配 (1440, 1024, 768, 430, 390, 375)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-summary-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .protocol-flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .obs-panel {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .catalog-item {
    grid-template-columns: 50px 100px 1fr 110px;
  }
  
  .catalog-excerpt {
    display: none;
  }
  
  .plan-row {
    grid-template-columns: 70px 1fr 240px;
    padding: 16px 18px;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .article-layout {
    grid-template-columns: 1fr;
  }
  
  .toc-card {
    position: static;
    margin-bottom: 30px;
  }
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero-main-title {
    font-size: 1.85rem;
  }
  
  .hero-summary-grid {
    grid-template-columns: 1fr;
  }
  
  .intel-panel-grid {
    grid-template-columns: 1fr;
  }
  
  .carrier-pipeline {
    grid-template-columns: 1fr;
  }
  
  .carrier-arrow {
    transform: rotate(90deg);
    padding: 10px 0;
  }
  
  .unlock-grid, .client-grid {
    grid-template-columns: 1fr;
  }
  
  .review-topics-grid {
    grid-template-columns: 1fr;
  }
  
  /* 移动端套餐情报板：单列，标准套餐优先突出 */
  .plans-board {
    display: flex;
    flex-direction: column;
  }
  
  .plan-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .plan-row.plan-featured {
    order: -1; /* 标准套餐优先显示 */
  }
  
  .plan-row-action {
    justify-content: space-between;
  }
  
  .catalog-item {
    grid-template-columns: 40px 1fr;
    gap: 10px;
  }
  
  .catalog-cat, .catalog-readtime {
    display: none;
  }
  
  .catalog-action {
    grid-column: 1 / -1;
    text-align: left;
    margin-top: 6px;
  }
  
  .article-cta-box {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
}

@media (max-width: 430px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  
  .hero-main-title {
    font-size: 1.6rem;
  }
  
  .hero-page-h1 {
    font-size: 0.92rem;
  }
  
  .section-h2 {
    font-size: 1.4rem;
  }
  
  .protocol-flow-grid {
    grid-template-columns: 1fr;
  }
  
  .obs-panel {
    grid-template-columns: 1fr;
  }
  
  .evening-indicators {
    grid-template-columns: 1fr;
  }
}