/* ============================================================
   VPNCU · components.css
   Tab / TOC / FAQ / 套餐卡 / 线路表 / 平台卡 / 文章卡 / Callout / 推广块 / 悬浮 CTA
   ============================================================ */

/* ---------- Tab 切换 ---------- */
.tabs {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--panel);
}

.tabs-list {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel, var(--panel));
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  flex: 0 0 auto;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
  min-height: 44px;
  transition: color .18s ease, border-color .18s ease;
}

.tab-btn:hover {
  color: var(--ink);
}

.tab-btn[aria-selected="true"] {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}

.tab-panel {
  padding: 24px 28px;
}

.tab-panel[hidden] {
  display: none;
}

/* ---------- TOC 吸顶目录 ---------- */
.toc-tabs {
  position: sticky;
  top: var(--header-h);
  z-index: 50;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.toc-tabs a {
  display: inline-block;
  flex: 0 0 auto;
  padding: 13px 18px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .18s ease, border-color .18s ease;
  min-height: 44px;
}

.toc-tabs a:hover {
  color: var(--ink);
}

.toc-tabs a.active {
  color: var(--accent-dark);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

body:has(.toc-tabs) section[id] {
  scroll-margin-top: calc(var(--header-h) + 64px);
}

/* ---------- FAQ 折叠 ---------- */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  background: var(--panel);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--muted);
  flex-shrink: 0;
  transition: transform .2s ease;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item .faq-body {
  padding: 0 20px 18px;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
}

.faq-item .faq-body p {
  margin-bottom: 10px;
}

/* ---------- 套餐卡 ---------- */
.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.plan-card {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  padding: 28px;
  position: relative;
  box-shadow: var(--shadow-1);
  transition: transform .22s ease, box-shadow .22s ease;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.plan-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.plan-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-2);
}

.plan-badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--r-pill);
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
}

.plan-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--ink);
}

.plan-desc {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.plan-price {
  margin-top: 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 36px;
  color: var(--ink);
  line-height: 1.1;
}

.plan-price .cur {
  font-size: 18px;
  font-weight: 700;
  vertical-align: top;
  margin-right: 2px;
}

.plan-price .per {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  margin-left: 4px;
}

.plan-features {
  margin: 20px 0;
  padding: 0;
  list-style: none;
  flex: 1;
}

.plan-features li {
  padding: 7px 0;
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.plan-features li::before {
  content: '✓';
  color: var(--ok);
  font-weight: 700;
  flex-shrink: 0;
}

.plan-card .btn {
  width: 100%;
}

/* ---------- 线路表 ---------- */
.table-scroll {
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 14px;
}

.data-table th {
  text-align: left;
  padding: 12px 14px;
  background: var(--panel2);
  color: var(--ink);
  font-weight: 600;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  vertical-align: top;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover td {
  background: var(--bg);
}

.data-table .table-group td {
  background: var(--panel2);
  font-weight: 700;
  color: var(--ink);
  font-size: 12.5px;
  letter-spacing: .04em;
}

.region-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-dark);
  font-weight: 600;
  white-space: nowrap;
}

/* ---------- 平台卡 ---------- */
.platform-card-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.platform-card {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  padding: 22px 16px;
  text-align: center;
  transition: transform .2s ease, box-shadow .2s ease;
  min-width: 0;
}

.platform-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.platform-card .pc-icon {
  width: 34px;
  height: 34px;
  margin: 0 auto 12px;
  color: var(--accent-dark);
}

.platform-card .pc-icon svg {
  display: block;
  width: 34px;
  height: 34px;
}

.platform-card .pc-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.platform-card .pc-btn {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
  padding: 6px 14px;
  border: 1px solid var(--accent);
  border-radius: var(--r-sm);
  transition: background .18s ease, color .18s ease;
}

.platform-card .pc-btn:hover {
  background: var(--accent);
  color: var(--white);
}

/* ---------- 博客文章卡 ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.post-card {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  overflow: hidden;
  transition: transform .22s ease, box-shadow .22s ease;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.post-card-body {
  padding: 22px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--muted);
}

.post-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 600;
  border-radius: var(--r-pill);
  background: var(--panel2);
  color: var(--accent-dark);
  max-width: 100%;
  overflow: hidden;
  white-space: nowrap;
}

.post-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 8px;
}

.post-card:hover .post-title {
  color: var(--accent-dark);
}

.post-summary {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.6;
  flex: 1;
}

.post-link {
  margin-top: 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent-dark);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- Callout ---------- */
.callout {
  border-left: 3px solid var(--accent);
  background: var(--panel);
  padding: 16px 22px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin: 20px 0;
}

.callout p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
}

.callout strong {
  color: var(--ink);
}

.callout.info {
  border-left-color: var(--accent);
}

.callout.warn {
  border-left-color: var(--warn);
}

.callout.error {
  border-left-color: var(--err);
}

/* ---------- 文末推广块 ---------- */
.promo-block {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  padding: 36px 40px;
  margin: 48px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.promo-block .promo-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  color: var(--ink);
  letter-spacing: -.01em;
}

.promo-block .promo-text {
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--muted);
  max-width: 480px;
}

/* ---------- 悬浮 CTA ---------- */
.float-cta {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--white);
  background: var(--accent);
  border-radius: 999px;
  box-shadow: 0 8px 22px rgba(25,173,146,.36);
  transition: background .18s ease, transform .18s ease;
  min-height: 44px;
}

.float-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

.float-cta svg {
  display: block;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* 页尾避让垫块 */
body:has(.float-cta)::after {
  content: '';
  display: block;
  height: calc(88px + env(safe-area-inset-bottom, 0px));
}

/* ---------- 响应式组件 ---------- */
@media (max-width: 900px) {
  .plan-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .platform-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .post-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .tab-panel {
    padding: 18px 16px;
  }

  .toc-tabs {
    top: var(--header-h);
  }

  .float-cta {
    right: 16px;
    bottom: 16px;
    padding: 11px 20px;
    font-size: 13.5px;
  }

  .promo-block {
    padding: 28px 24px;
  }
}

@media (max-width: 480px) {
  .platform-card-grid {
    grid-template-columns: 1fr 1fr;
  }
}