/* ============================================
   ArkSMS 云信 · Components：header / footer /
   客服浮窗 / 返回顶部 / Tab / 时间轴 / 面包屑
   ============================================ */

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border-light);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--color-text-primary); }
.brand:hover { color: var(--color-text-primary); }
.brand-mark { width: 30px; height: 30px; flex: none; border-radius: 8px; }
.brand-name { font-size: 17px; font-weight: 600; letter-spacing: -0.02em; }
.brand-name em { font-style: normal; margin-left: 3px; font-weight: 500; color: var(--color-text-secondary); }
.main-nav { display: flex; gap: 2px; margin: 0 auto; }
.main-nav a {
  position: relative; padding: 8px 14px; border-radius: var(--radius-control);
  color: var(--color-text-secondary); font-size: var(--fs-body); font-weight: 500;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.main-nav a:hover { color: var(--color-text-primary); background: rgba(0, 0, 0, 0.04); }
.main-nav a.is-active { color: var(--color-action-primary); }
.main-nav a.is-active::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 1px;
  height: 2px; border-radius: 2px; background: var(--color-action-primary);
}
.header-actions { display: flex; align-items: center; gap: 10px; }

.nav-toggle { display: none; flex-direction: column; align-items: center; justify-content: center; gap: 5px; width: 40px; height: 40px; border-radius: var(--radius-control); }
.nav-toggle span { width: 18px; height: 2px; border-radius: 2px; background: var(--color-text-primary); transition: transform var(--t-mid) var(--ease), opacity var(--t-mid) var(--ease); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 99;
    flex-direction: column; gap: 2px; margin: 0; padding: 12px 16px 20px;
    background: #fff; border-bottom: 1px solid var(--color-border-light); box-shadow: var(--shadow-overlay);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease), visibility var(--t-mid);
  }
  .main-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .main-nav a { padding: 12px 14px; font-size: 16px; }
  .main-nav a.is-active { background: var(--color-state-info-bg); }
  .main-nav a.is-active::after { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn-ghost { display: none; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--color-bg-muted); border-top: 1px solid var(--color-border-light); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; padding: 56px 0 40px; }
.footer-brand .brand { margin-bottom: 14px; }
.footer-slogan { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 8px; }
.footer-desc { font-size: var(--fs-small); line-height: 1.8; color: var(--color-text-secondary); max-width: 300px; }
.footer-col h4 { margin-bottom: 14px; font-size: var(--fs-body); }
.footer-col a, .footer-col p { display: block; padding: 5px 0; font-size: var(--fs-small); color: var(--color-text-secondary); }
.footer-col a:hover { color: var(--color-action-primary); }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 18px 0; border-top: 1px solid var(--color-divider);
  font-size: var(--fs-caption); color: var(--color-text-tertiary);
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; padding: 40px 0 28px; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- 客服浮窗 ---------- */
.service-widget { position: fixed; right: 24px; bottom: 24px; z-index: 900; display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.back-top {
  width: 40px; height: 40px; border-radius: 50%;
  background: #fff; color: var(--color-text-secondary);
  border: 1px solid var(--color-border-light); box-shadow: var(--shadow-raised);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: all var(--t-mid) var(--ease);
}
.back-top.is-show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { color: var(--color-action-primary); border-color: var(--color-action-primary); }
.service-fab {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--color-action-primary); color: #fff; box-shadow: var(--shadow-overlay);
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--t-mid) var(--ease), background var(--t-fast) var(--ease);
}
.service-fab:hover { transform: scale(1.06); background: var(--color-action-primary-hover); }
.service-card {
  position: absolute; right: 0; bottom: 68px; width: 300px;
  padding: 20px; background: #fff;
  border: 1px solid var(--color-border-light); border-radius: var(--radius-container); box-shadow: var(--shadow-overlay);
  opacity: 0; visibility: hidden; transform: translateY(8px) scale(0.98); transform-origin: bottom right;
  transition: all var(--t-mid) var(--ease);
}
.service-card.is-open { opacity: 1; visibility: visible; transform: none; }
.service-card h4 { margin-bottom: 4px; }
.service-card .service-sub { font-size: var(--fs-caption); color: var(--color-text-tertiary); margin-bottom: 14px; }
.service-close { position: absolute; top: 10px; right: 10px; width: 28px; height: 28px; border-radius: 50%; color: var(--color-text-tertiary); display: flex; align-items: center; justify-content: center; }
.service-close:hover { background: var(--color-bg-page); color: var(--color-text-primary); }
.service-qr { display: flex; gap: 12px; align-items: center; padding: 12px; margin-bottom: 12px; background: var(--color-bg-muted); border: 1px dashed var(--color-border); border-radius: 12px; }
.service-qr img { width: 72px; height: 72px; flex: none; }
.service-qr p { font-size: var(--fs-small); font-weight: 500; line-height: 1.6; }
.service-qr p span { display: block; font-weight: 400; font-size: var(--fs-caption); color: var(--color-text-tertiary); }
.service-list li { display: flex; justify-content: space-between; gap: 10px; padding: 7px 0; font-size: var(--fs-small); color: var(--color-text-secondary); border-bottom: 1px solid var(--color-divider); }
.service-list li:last-child { border-bottom: 0; }
.service-list b { font-weight: 500; color: var(--color-text-primary); }
.service-card .btn { margin-top: 12px; }
@media (max-width: 767px) { .service-widget { right: 16px; bottom: 16px; } .service-card { width: min(300px, calc(100vw - 32px)); } }

/* ---------- Tabs ---------- */
.tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 36px; }
.tab-btn {
  height: 40px; padding: 0 24px; border-radius: var(--radius-chip);
  background: #fff; border: 1px solid var(--color-border);
  color: var(--color-text-secondary); font-weight: 500;
  transition: all var(--t-fast) var(--ease);
}
.tab-btn:hover { border-color: var(--color-action-primary); color: var(--color-action-primary); }
.tab-btn[aria-selected="true"] { background: var(--color-action-primary); border-color: var(--color-action-primary); color: #fff; box-shadow: var(--shadow-raised); }

/* ---------- 竖排时间轴 ---------- */
.vtimeline { max-width: 760px; margin: 0 auto; }
.vtimeline li { position: relative; padding: 0 0 34px 40px; }
.vtimeline li::before { content: ''; position: absolute; left: 13px; top: 30px; bottom: 0; width: 2px; background: var(--color-divider); }
.vtimeline li:last-child { padding-bottom: 0; }
.vtimeline li:last-child::before { display: none; }
.vtimeline .dot {
  position: absolute; left: 0; top: 2px; width: 28px; height: 28px; border-radius: 50%;
  background: var(--color-state-info-bg); color: var(--color-action-primary);
  border: 2px solid #fff; box-shadow: var(--shadow-subtle);
  display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700;
}
.vtimeline .vt-date { font-size: var(--fs-caption); font-weight: 600; color: var(--color-text-tertiary); letter-spacing: 0.04em; }
.vtimeline h3 { margin: 4px 0 6px; font-size: 17px; }
.vtimeline p { font-size: var(--fs-small); line-height: 1.8; color: var(--color-text-secondary); }

/* ---------- 横排步骤 ---------- */
.hsteps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.hstep { position: relative; padding: 0 12px; text-align: center; }
.hstep .num {
  width: 46px; height: 46px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--grad-hero); color: #fff; box-shadow: var(--shadow-raised);
  display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700;
}
.hstep:not(:last-child)::after {
  content: ''; position: absolute; top: 23px; left: calc(50% + 36px);
  width: calc(100% - 72px); height: 2px;
  background: repeating-linear-gradient(90deg, var(--color-border) 0 6px, transparent 6px 12px);
}
.hstep h3 { margin-bottom: 8px; font-size: 17px; }
.hstep p { font-size: var(--fs-small); line-height: 1.8; color: var(--color-text-secondary); }
@media (max-width: 767px) {
  .hsteps { grid-template-columns: 1fr; gap: 28px; }
  .hstep:not(:last-child)::after { display: none; }
}

/* ---------- 面包屑 ---------- */
.breadcrumb { display: flex; align-items: center; gap: 8px; padding: 22px 0; font-size: var(--fs-small); color: var(--color-text-tertiary); }
.breadcrumb a { color: var(--color-text-tertiary); }
.breadcrumb a:hover { color: var(--color-action-primary); }
.breadcrumb .sep { color: var(--color-border); }