/* ============================================================
   全部导航档案页专属样式库 (Nav Directory Pro Stylesheet)
   ============================================================ */

/* 返回首页链接 */
.back-home {
  font: 11px 'DM Mono', monospace;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 5px;
  transition: all 0.2s ease;
}
.back-home:hover {
  color: #e87333;
  border-color: #e87333;
}

/* 顶部封面 */
.nav-cover {
  min-height: 480px;
  padding-top: 80px;
  padding-bottom: 75px;
  background: 
    radial-gradient(circle at 82% 25%, rgba(224, 126, 68, 0.1) 0%, rgba(244, 241, 234, 0) 55%),
    #f4f1ea;
  color: #0f1923;
  border-bottom: 1.5px solid #ded8cb;
  position: relative;
  overflow: hidden;
}
.nav-cover:after {
  display: none;
}
.nav-cover > * {
  position: relative;
  z-index: 1;
}
.nav-cover .eyebrow {
  font: 700 11px 'DM Mono', monospace;
  letter-spacing: .16em;
  color: #c95e34;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.nav-cover .eyebrow span {
  color: #101923;
  margin-right: 14px;
  background: #e6e0d3;
  padding: 3px 8px;
  border-radius: 4px;
}
.nav-cover h1 {
  font: 800 clamp(52px, 7.5vw, 96px) / 1.02 'Noto Serif SC', serif;
  letter-spacing: -.08em;
  margin: 18px 0 20px;
  color: #0f1923;
}
.nav-cover em {
  font-style: normal;
  color: #c95e34;
}
.nav-cover-desc {
  font-size: 15.5px;
  line-height: 1.85;
  color: #4b5f6e;
  max-width: 720px;
  margin: 0 0 36px;
}

/* 实时搜索栏：杂志感卡片与自然光泽 */
.nav-search-bar {
  max-width: 820px;
  margin-bottom: 38px;
  background: #ffffff;
  border: 1.5px solid #dfdad0;
  border-radius: 14px;
  padding: 18px 22px;
  box-shadow: 0 10px 28px rgba(16, 25, 35, 0.05);
}
.nav-search-input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #f8f6f0;
  border: 1px solid #e2ded4;
  border-radius: 9px;
  padding: 12px 18px;
  transition: border-color 0.2s, background 0.2s;
}
.nav-search-input-wrap:focus-within {
  border-color: #0f1923;
  background: #ffffff;
}
.nav-search-icon {
  font-size: 17px;
  color: #647585;
  flex-shrink: 0;
}
.nav-search-input {
  background: transparent;
  border: none;
  outline: none;
  color: #0f1923;
  font-family: inherit;
  font-size: 14.5px;
  width: 100%;
}
.nav-search-input::placeholder {
  color: #8a9ba8;
}
.nav-search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  align-items: center;
}
.nav-search-tags span.filter-label {
  font: 11px 'DM Mono', monospace;
  color: #647585;
  margin-right: 4px;
}
.nav-filter-btn {
  background: #f1eee7;
  border: 1px solid #e0dbd0;
  color: #475a6a;
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.nav-filter-btn:hover, .nav-filter-btn.active {
  background: #101923;
  color: #ffffff;
  border-color: #101923;
  font-weight: 700;
}

/* 核心数据指示器看板 */
.nav-metrics-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  max-width: 980px;
}
.nav-metric-item {
  background: #ffffff;
  border: 1.5px solid #ded9cd;
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 4px 12px rgba(16, 25, 35, 0.03);
}
.nav-metric-num {
  font: 800 24px 'Noto Serif SC', 'DM Mono', serif;
  color: #c95e34;
}
.nav-metric-item:nth-child(2) .nav-metric-num { color: #d97736; }
.nav-metric-item:nth-child(3) .nav-metric-num { color: #0284c7; }
.nav-metric-item:nth-child(4) .nav-metric-num { color: #16a34a; }
.nav-metric-item:nth-child(5) .nav-metric-num { color: #7c3aed; }
.nav-metric-item:nth-child(6) .nav-metric-num { color: #c95e34; }
.nav-metric-label {
  font-size: 11.5px;
  color: #556778;
  font-weight: 600;
  font-family: 'DM Mono', monospace;
}

/* 核心档案专区矩阵 */
.nav-directory {
  padding-top: 75px;
  padding-bottom: 85px;
  background: #edebe4;
}
.nav-directory .section-kicker {
  font: 11px 'DM Mono', monospace;
  letter-spacing: 0.16em;
  color: #556677;
  margin-bottom: 30px;
}
.directory-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.directory-card {
  background: #fbfaf6;
  border: 1.5px solid #dfdcd2;
  border-radius: 14px;
  padding: 30px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s;
  overflow: hidden;
}
.directory-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--card-accent, var(--cyan));
}
.directory-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(16,25,35,0.09);
  border-color: #cbbeaa;
  background: #ffffff;
}
.directory-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}
.directory-card-no {
  font: 700 13px 'DM Mono', monospace;
  color: #d16f3e;
  letter-spacing: 0.08em;
}
.directory-card-badge {
  font: 700 11.5px 'DM Mono', monospace;
  padding: 3px 9px;
  border-radius: 4px;
  background: #eef1f3;
  color: #3b5266;
}
.directory-card-title {
  font: 800 clamp(22px, 2.5vw, 28px) 'Noto Serif SC', serif;
  letter-spacing: -0.05em;
  margin: 0 0 10px;
  color: #0f1923;
  display: flex;
  align-items: center;
  gap: 10px;
}
.directory-card-desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: #556575;
  margin: 0 0 20px;
}
.directory-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.directory-card-tag {
  font-size: 11.5px;
  padding: 4px 10px;
  border-radius: 4px;
  background: #f1eee7;
  color: #2b3a4a;
  border: 1px solid #e2ded5;
}
.directory-card-btn {
  margin-top: auto;
  font: 700 13px 'DM Mono', monospace;
  color: #0f1923;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid #ede8dc;
  padding-top: 16px;
  transition: color 0.2s, gap 0.2s;
}
.directory-card:hover .directory-card-btn {
  color: #d16f3e;
  gap: 12px;
}

/* 场景化快速直达卡片 */
.nav-scenarios-section {
  padding-top: 75px;
  padding-bottom: 80px;
  background: #f4f2eb;
  border-top: 1px solid #dfdbce;
}
.nav-scenarios-section .section-kicker {
  font: 11px 'DM Mono', monospace;
  letter-spacing: 0.16em;
  color: #64748b;
  margin-bottom: 28px;
}
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.scenario-card {
  background: #ffffff;
  border: 1.5px solid #e3e0d5;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  color: inherit;
}
.scenario-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 30px rgba(0,0,0,0.07);
  border-color: #f09a54;
}
.scenario-icon {
  font-size: 28px;
  margin-bottom: 14px;
}
.scenario-title {
  font: 800 17.5px 'Noto Serif SC', serif;
  color: #101923;
  margin: 0 0 8px;
}
.scenario-desc {
  font-size: 13px;
  line-height: 1.7;
  color: #64748b;
  margin: 0 0 16px;
}
.scenario-link {
  margin-top: auto;
  font: 700 12px 'DM Mono', monospace;
  color: #e87333;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 协议与网络知识图谱 */
.nav-taxonomy-section {
  padding-top: 75px;
  padding-bottom: 85px;
  background: #101a24;
  color: #eaf1f4;
}
.nav-taxonomy-section .section-kicker {
  font: 11px 'DM Mono', monospace;
  letter-spacing: 0.16em;
  color: #7899a7;
  margin-bottom: 28px;
}
.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.taxonomy-col {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: 14px;
  padding: 26px;
}
.taxonomy-col h3 {
  font: 800 18px 'Noto Serif SC', serif;
  color: var(--cyan);
  margin: 0 0 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding-bottom: 12px;
}
.taxonomy-items {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.taxonomy-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.taxonomy-item b {
  font-size: 14px;
  color: #ffffff;
}
.taxonomy-item p {
  font-size: 12.5px;
  color: #8da4b0;
  margin: 0;
  line-height: 1.6;
}

/* 新手 3 步起步流程 */
.nav-workflow-section {
  padding-top: 75px;
  padding-bottom: 85px;
  background: #e7e5dd;
  border-top: 1px solid #d5d1c5;
}
.nav-workflow-section .section-kicker {
  font: 11px 'DM Mono', monospace;
  letter-spacing: 0.16em;
  color: #64748b;
  margin-bottom: 28px;
}
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.workflow-step-card {
  background: #fbf9f4;
  border: 1.5px solid #ddd9cd;
  border-radius: 14px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}
.workflow-step-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(0,0,0,0.06);
}
.workflow-step-no {
  font: 800 32px 'DM Mono', monospace;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 14px;
}
.workflow-step-card h3 {
  font: 800 19px 'Noto Serif SC', serif;
  margin: 0 0 10px;
  color: #101923;
}
.workflow-step-card p {
  font-size: 13.5px;
  line-height: 1.75;
  color: #556677;
  margin: 0 0 18px;
}
.workflow-step-action {
  margin-top: auto;
  font: 700 12.5px 'DM Mono', monospace;
  color: #0f1923;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.workflow-step-action:hover {
  color: #e87333;
}

/* Telegram Header Badge */
.tg-header-badge {
  font: 700 11px 'DM Mono', monospace;
  color: #26a5e4;
  background: rgba(38, 165, 228, 0.12);
  border: 1px solid rgba(38, 165, 228, 0.35);
  padding: 5px 12px;
  border-radius: 20px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  margin-right: 14px;
}
.tg-header-badge:hover {
  background: #26a5e4;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(38, 165, 228, 0.4);
}

/* 关于我们卡片与 TG 按钮 */
.about-card-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid #ede8dc;
}
.tg-join-btn {
  background: linear-gradient(135deg, #26a5e4 0%, #1e88c7 100%);
  color: #ffffff !important;
  text-decoration: none;
  font: 700 13px 'Manrope', 'DM Mono', sans-serif;
  padding: 11px 18px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(38, 165, 228, 0.3);
  transition: all 0.2s ease;
}
.tg-join-btn:hover {
  background: linear-gradient(135deg, #32b1f0 0%, #2094d6 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(38, 165, 228, 0.45);
}
.about-policy-link {
  font: 700 12px 'DM Mono', monospace;
  color: #556575;
  text-decoration: none;
  transition: color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}
.about-policy-link:hover {
  color: #e87333;
}

/* 官方 TG 防失联社群专区横幅 */
.nav-tg-banner-section {
  padding-top: 50px;
  padding-bottom: 75px;
  background: #edebe4;
}
.tg-banner-card {
  background: radial-gradient(circle at 85% 20%, #153e56 0%, #0d2538 45%, #081622 100%);
  border: 1.5px solid rgba(38, 165, 228, 0.4);
  border-radius: 16px;
  padding: 42px 48px;
  color: #ffffff;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 36px;
  align-items: center;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.22);
  position: relative;
  overflow: hidden;
}
.tg-banner-card::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 220px;
  height: 220px;
  background: rgba(38, 165, 228, 0.15);
  border-radius: 50%;
  filter: blur(50px);
  pointer-events: none;
}
.tg-banner-copy h2 {
  font: 800 clamp(24px, 3vw, 34px) 'Noto Serif SC', serif;
  margin: 0 0 12px;
  letter-spacing: -0.04em;
  color: #ffffff;
}
.tg-banner-copy h2 em {
  font-style: normal;
  color: #4dc2f8;
}
.tg-banner-copy p {
  font-size: 14.5px;
  line-height: 1.8;
  color: #a7c5d4;
  margin: 0 0 22px;
  max-width: 580px;
}
.tg-banner-perks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 8px;
}
.tg-banner-perk {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #e2f0f7;
}
.tg-banner-perk span.perk-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 8px #38bdf8;
}
.tg-banner-action-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 26px;
  backdrop-filter: blur(8px);
}
.tg-banner-action-col .tg-url-text {
  font: 700 13px 'DM Mono', monospace;
  color: #38bdf8;
  word-break: break-all;
}
.tg-banner-cta {
  background: #26a5e4;
  color: #ffffff !important;
  text-decoration: none;
  font: 800 15px 'Manrope', 'Noto Serif SC', sans-serif;
  padding: 13px 24px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  box-sizing: border-box;
  box-shadow: 0 6px 20px rgba(38, 165, 228, 0.4);
  transition: all 0.25s ease;
}
.tg-banner-cta:hover {
  background: #38bdf8;
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(38, 165, 228, 0.55);
}
.tg-banner-note {
  font-size: 11.5px;
  color: #89a9bc;
  line-height: 1.5;
  margin: 0;
}

/* 响应式断点 */
@media(max-width: 980px) {
  .nav-metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .taxonomy-grid {
    grid-template-columns: 1fr;
  }
  .workflow-grid {
    grid-template-columns: 1fr;
  }
  .tg-banner-card {
    grid-template-columns: 1fr;
    padding: 30px;
    gap: 24px;
  }
}
@media(max-width: 720px) {
  .directory-grid {
    grid-template-columns: 1fr;
  }
  .nav-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .back-home {
    display: none;
  }
  .nav-cover {
    min-height: auto;
    padding-top: 50px;
    padding-bottom: 60px;
  }
  .tg-banner-perks {
    grid-template-columns: 1fr;
  }
}