/* ═════════════════════════════════════════
   SNSUC — PWA layer  v20260730h
   1. 夜间模式 Night mode  (html[data-theme="dark"])
   2. 安装横幅 Install banner (.pwa-install)
   3. 离线提示 Offline indicator (.pwa-offline)
   4. 移动端卡片横滑 Mobile card swipe (.quote-scroller / .price-grid)
   Load AFTER css/style.css.
   ═════════════════════════════════════════ */

/* ─────────────────────────────────────────
   1 · NIGHT MODE — 墨夜青山
   deep green-black surfaces, brand green kept as accent
   ───────────────────────────────────────── */
html[data-theme="dark"] {
  --ink-frost:   #12271b;
  --ink-mist:    #0f2318;
  --ink-pale:    #2c5c40;
  --ink-light:   #45b870;
  --ink-mint:    #6bd08f;
  --ink-bright:  #4fd07a;
  --ink-main:    #2fb45e;
  --ink-core:    #1f9a4c;
  --ink-dark:    #157a3a;
  --ink-deep:    #0b3a1c;

  --paper:       #0d1f15;
  --paper-warm:  #11271a;

  --text-deep:   #eaf3ec;
  --text-body:   #ccdcd1;
  --text-muted:  #8fa596;

  --gold:        #d8b559;
  --gold-light:  #f0dca0;

  --border-ink:  rgba(120, 208, 152, 0.16);
  --shadow-soft: 0 4px 24px rgba(0, 0, 0, .45);
  --shadow-card: 0 2px 16px rgba(0, 0, 0, .5);

  color-scheme: dark;
}

html[data-theme="dark"] body {
  background: var(--paper);
  color: var(--text-body);
}

/* header / drawer surfaces */
html[data-theme="dark"] .header.scrolled {
  background: rgba(13, 31, 21, .92);
  border-bottom-color: var(--border-ink);
}
html[data-theme="dark"] .nav-drawer,
html[data-theme="dark"] .dropdown-menu {
  background: #10261a;
  border-color: var(--border-ink);
  color: var(--text-body);
}
html[data-theme="dark"] .nav-drawer a,
html[data-theme="dark"] .dropdown-menu a,
html[data-theme="dark"] .nav-link { color: var(--text-body); }
html[data-theme="dark"] .nav-drawer a:hover,
html[data-theme="dark"] .dropdown-menu a:hover,
html[data-theme="dark"] .nav-link:hover { color: var(--ink-mint); }
html[data-theme="dark"] .logo-cn { color: #45b870; }

/* generic light surfaces → ink-night cards */
html[data-theme="dark"] .price-card,
html[data-theme="dark"] .news-list-item,
html[data-theme="dark"] .biz-tile,
html[data-theme="dark"] .card,
html[data-theme="dark"] .quote-card,
html[data-theme="dark"] .insight-card,
html[data-theme="dark"] .stat-card,
html[data-theme="dark"] .lang-toggle {
  background: rgba(255, 255, 255, .045);
  border-color: var(--border-ink);
  color: var(--text-body);
}
html[data-theme="dark"] .price-card:hover,
html[data-theme="dark"] .biz-tile:hover {
  border-color: rgba(79, 208, 122, .32);
  box-shadow: var(--shadow-card);
}
html[data-theme="dark"] .price-section { background: var(--ink-frost); opacity: 1; }
html[data-theme="dark"] .pc-source { background: rgba(255, 255, 255, .07); color: var(--text-muted); }
html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] .pc-name { color: var(--text-deep); }

/* tables & inputs */
html[data-theme="dark"] table { background: rgba(255, 255, 255, .03); color: var(--text-body); }
html[data-theme="dark"] thead th { background: rgba(255, 255, 255, .06); color: var(--text-deep); }
html[data-theme="dark"] td,
html[data-theme="dark"] th { border-color: var(--border-ink); }
html[data-theme="dark"] input,
html[data-theme="dark"] textarea,
html[data-theme="dark"] select {
  background: rgba(255, 255, 255, .05);
  color: var(--text-body);
  border-color: var(--border-ink);
}
html[data-theme="dark"] input::placeholder,
html[data-theme="dark"] textarea::placeholder { color: var(--text-muted); }

/* ink-wash backdrops read too bright at night */
html[data-theme="dark"] .ink-bg::before,
html[data-theme="dark"] .mountain-watermark { opacity: .35; }
html[data-theme="dark"] img:not(.logo-image):not(.pwa-install-logo) { filter: brightness(.92); }

/* ── 夜间模式 · 分页样式表里写死的 #fff 底面 ──
   data/membership/cert/seo 有若干硬编码白底（非 var(--paper)），夜间会变成
   白卡片 + 浅色文字，正文对比度只剩 ~1.5:1，远低于 WCAG AA 4.5:1。
   pwa.css 在所有页面最后加载，故在此统一收口。中英文同样受益。 */
html[data-theme="dark"] .seo-card,
html[data-theme="dark"] .faq-item,
html[data-theme="dark"] .al-channel,
html[data-theme="dark"] .al-item {
  background: rgba(255, 255, 255, .045);
  border-color: var(--border-ink);
  color: var(--text-body);
}
html[data-theme="dark"] .qa-toc a,
html[data-theme="dark"] .seo-related a {
  background: rgba(255, 255, 255, .05);
  border-color: var(--border-ink);
  color: var(--ink-mint);
}
html[data-theme="dark"] .qa-toc a:hover,
html[data-theme="dark"] .seo-related a:hover {
  background: var(--ink-core);
  color: #eaf3ec;
  border-color: var(--ink-core);
}
/* 表单控件：白底 + 浅字 = 不可读 */
html[data-theme="dark"] .dp-select,
html[data-theme="dark"] .al-input,
html[data-theme="dark"] .al-field select,
html[data-theme="dark"] .al-seg button,
html[data-theme="dark"] .mb-field input,
html[data-theme="dark"] .cert-verify textarea,
html[data-theme="dark"] .cert-field input:focus,
html[data-theme="dark"] .cert-field select:focus {
  background-color: rgba(255, 255, 255, .06);
  color: var(--text-body);
  border-color: var(--border-ink);
}
html[data-theme="dark"] .al-seg button.active { background: var(--ink-core); color: #eaf3ec; }
/* 推荐档位卡的白色渐变同理 */
html[data-theme="dark"] .mb-tier.recommended {
  background: linear-gradient(180deg, rgba(255,255,255,.075) 0%, var(--ink-mist) 100%);
}
html[data-theme="dark"] .mb-faq details,
html[data-theme="dark"] .mb-matrix-wrap,
html[data-theme="dark"] .dp-panel,
html[data-theme="dark"] .api-endpoint,
html[data-theme="dark"] .dp-card,
html[data-theme="dark"] .cert-pillar,
html[data-theme="dark"] .cert-flow-step,
html[data-theme="dark"] .cert-price-card {
  background-color: rgba(255, 255, 255, .04);
  border-color: var(--border-ink);
}
/* 金色小字在墨夜底上偏暗，抬到 AA */
html[data-theme="dark"] .dp-disclaimer { color: var(--gold-light); }
html[data-theme="dark"] .cert-verify-result.warn { color: var(--gold-light); }
/* 灰掉的"不含"标记在夜间几乎不可见 */
html[data-theme="dark"] .mx-no { color: rgba(143, 165, 150, .75); }

/* ─────────────────────────────────────────
   2 · THEME TOGGLE BUTTON
   ───────────────────────────────────────── */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0;
  border: 1px solid var(--border-ink);
  border-radius: 99px;
  background: transparent;
  color: var(--ink-main);
  font-size: .95rem; line-height: 1;
  cursor: pointer;
  transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.theme-toggle:hover {
  background: var(--ink-frost);
  border-color: rgba(0, 144, 64, .28);
}
html[data-theme="dark"] .theme-toggle {
  color: var(--gold);
  border-color: var(--border-ink);
}
html[data-theme="dark"] .theme-toggle:hover { background: rgba(255, 255, 255, .07); }

/* floating variant (pages without .header-actions, and all mobile) */
.theme-toggle--float {
  position: fixed; left: 1rem; bottom: 1.4rem; z-index: 1100;
  width: 42px; height: 42px;
  background: var(--paper);
  box-shadow: var(--shadow-card);
}

@media (max-width: 900px) {
  /* style.css hides non-menu header actions on mobile — float the toggle instead */
  .header-actions > .theme-toggle {
    display: inline-flex !important;
    position: fixed; left: 1rem; bottom: 1.4rem; z-index: 1100;
    width: 42px; height: 42px;
    background: var(--paper);
    box-shadow: var(--shadow-card);
  }
}

/* ─────────────────────────────────────────
   3 · INSTALL BANNER  .pwa-install
   ───────────────────────────────────────── */
.pwa-install {
  position: fixed; z-index: 1300;
  left: 50%; bottom: 1.1rem;
  transform: translate(-50%, 160%);
  width: min(440px, calc(100vw - 1.6rem));
  display: flex; align-items: center; gap: .75rem;
  padding: .7rem .85rem;
  background: rgba(253, 251, 247, .96);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--border-ink);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 32px rgba(0, 60, 24, .16);
  opacity: 0;
  pointer-events: none;
  transition: transform .45s cubic-bezier(.25, .46, .45, .94), opacity .35s ease;
}
.pwa-install.is-visible {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}
.pwa-install-logo { width: 30px; height: 30px; object-fit: contain; flex-shrink: 0; }
.pwa-install-copy { display: flex; flex-direction: column; line-height: 1.35; min-width: 0; flex: 1; }
.pwa-install-copy strong {
  font-family: var(--font-display), 'ZCOOL XiaoWei', serif;
  font-weight: 400; font-size: 1rem; letter-spacing: .04em;
  color: var(--text-deep);
}
.pwa-install-copy span {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: .7rem; color: var(--text-muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pwa-install-accept {
  flex-shrink: 0;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: .78rem; font-weight: 600; letter-spacing: .02em;
  color: #fff; cursor: pointer;
  padding: .48rem 1rem;
  border: 0; border-radius: 99px;
  background: linear-gradient(135deg, var(--ink-main), var(--ink-core));
  transition: filter .25s ease, transform .25s ease;
}
.pwa-install-accept:hover { filter: brightness(1.08); transform: translateY(-1px); }
.pwa-install-close {
  flex-shrink: 0;
  width: 24px; height: 24px; padding: 0;
  border: 0; border-radius: 99px; background: transparent;
  color: var(--text-muted); font-size: 1.05rem; line-height: 1; cursor: pointer;
}
.pwa-install-close:hover { color: var(--text-deep); }

html[data-theme="dark"] .pwa-install {
  background: rgba(17, 39, 26, .96);
  box-shadow: 0 10px 32px rgba(0, 0, 0, .5);
}

/* ─────────────────────────────────────────
   4 · OFFLINE INDICATOR  .pwa-offline
   ───────────────────────────────────────── */
.pwa-offline {
  position: fixed; z-index: 1400;
  left: 50%; top: 0;
  transform: translate(-50%, -120%);
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .34rem .9rem;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: .72rem; letter-spacing: .02em;
  color: var(--paper);
  background: var(--ink-deep);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  box-shadow: 0 4px 16px rgba(0, 60, 24, .22);
  opacity: 0;
  pointer-events: none;
  transition: transform .4s cubic-bezier(.25, .46, .45, .94), opacity .3s ease;
}
.pwa-offline.is-visible { transform: translate(-50%, 0); opacity: 1; }
.pwa-offline-dot {
  width: 6px; height: 6px; border-radius: 99px;
  background: var(--gold);
  animation: pwa-pulse 1.8s ease-in-out infinite;
}
@keyframes pwa-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }

html[data-theme="dark"] .pwa-offline { background: #071a0e; color: var(--text-deep); }

/* ─────────────────────────────────────────
   5 · MOBILE CARD SWIPE — 横滑速览
   ───────────────────────────────────────── */
.quote-scroller {
  display: flex;
  gap: .75rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: .8rem;
}
.quote-scroller::-webkit-scrollbar { display: none; }
.quote-scroller > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

/* enhanced state applied by js/mobile-cards.js */
.is-swipeable {
  cursor: grab;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  overscroll-behavior-x: contain;
}
.is-swipeable::-webkit-scrollbar { display: none; }
.is-swipeable.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
  scroll-behavior: auto;
  user-select: none;
}
.is-swipeable.is-dragging > * { pointer-events: none; }

@media (max-width: 768px) {
  .quote-scroller > * { flex-basis: 76%; max-width: 320px; }
  .price-grid.is-swipeable { display: flex; overflow-x: auto; }
  .price-grid.is-swipeable > .price-card { flex: 0 0 46%; min-width: 148px; scroll-snap-align: start; }

  /* swipe affordance dots */
  .swipe-dots {
    display: flex; justify-content: center; gap: .3rem;
    margin-top: .1rem;
  }
  .swipe-dots i {
    width: 5px; height: 5px; border-radius: 99px;
    background: var(--border-ink);
    transition: background .25s ease, width .25s ease;
  }
  .swipe-dots i.is-active { width: 14px; background: var(--ink-main); }
}
@media (min-width: 769px) {
  .swipe-dots { display: none; }
}
@media (max-width: 480px) {
  .quote-scroller > * { flex-basis: 84%; }
}

@media (prefers-reduced-motion: reduce) {
  .pwa-install, .pwa-offline { transition: opacity .2s ease; }
  .pwa-offline-dot { animation: none; }
}

/* ═══════════════════════════════════════════════════════════
   I18N — 英文排版适配（.lang-en）
   字栈统一引用 style.css :root 的 --font-latin* / --font-ui。
   ═══════════════════════════════════════════════════════════ */

/* 安装横幅：标题原本走毛笔体，英文下会掉字形回落到系统字 */
html.lang-en .pwa-install-copy strong {
  font-family: var(--font-latin-head);
  font-weight: 700;
  font-size: .92rem;
  letter-spacing: .005em;
  line-height: 1.3;
  overflow-wrap: break-word;
}
/* 副标题原为单行省略号；英文更长，改为最多两行，信息不再被截断 */
html.lang-en .pwa-install-copy span {
  font-family: var(--font-ui);
  white-space: normal;
  text-overflow: clip;
  line-height: 1.35;
  overflow-wrap: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
}
html.lang-en .pwa-install-accept {
  font-family: var(--font-ui);
  letter-spacing: .01em;
  white-space: nowrap;
}
html.lang-en .pwa-offline { font-family: var(--font-ui); letter-spacing: .01em; }
html.lang-en .theme-toggle { font-family: var(--font-ui); }

/* 横滑速览：英文品名更长，卡片需要更宽才不会把价格挤到第二行 */
@media (max-width: 768px) {
  html.lang-en .quote-scroller > * { flex-basis: 86%; max-width: 340px; }
  html.lang-en .price-grid.is-swipeable > .price-card { flex: 0 0 58%; min-width: 176px; }
}
@media (max-width: 480px) {
  html.lang-en .quote-scroller > * { flex-basis: 92%; }
  html.lang-en .price-grid.is-swipeable > .price-card { flex: 0 0 72%; }
}
@media (max-width: 380px) {
  html.lang-en .pwa-install { gap: .55rem; padding: .6rem .7rem; }
  html.lang-en .pwa-install-copy strong { font-size: .86rem; }
  html.lang-en .pwa-install-accept { font-size: .72rem; padding: .44rem .8rem; }
}