/* =========================================================
   接码平台评测中心 — Design tokens (redesign v3: light + blue)
   Signature motif kept: a "透明度指数" (transparency index)
   dual gauge comparing named platforms — an audit/dashboard
   read, not a segmented OTP-code box (a sibling site's motif).
   Primary brand color is a rich azure blue (not default
   Tailwind blue/indigo); emerald is used only as a secondary
   "verified" semantic accent, so blue stays visually dominant.
   Light surface, distinct in hue from both prior sibling
   builds (one teal-on-paper, one cream-and-orange).
   ========================================================= */
:root {
  --color-bg: #F3F6FC;
  --color-surface: #FFFFFF;
  --color-surface-2: #EAF0FB;
  --color-ink: #10182B;
  --color-ink-soft: #4B5675;
  --color-ink-faint: #7C86A6;
  --color-line: #DCE4F5;
  --color-line-strong: #C2CEEA;

  --color-primary: #2F6FEA;
  --color-primary-dark: #1E4FC4;
  --color-primary-tint: #E7EFFE;

  --color-accent: #12B76A;
  --color-accent-dark: #0D9457;
  --color-accent-tint: #E3F9EE;

  --color-success: #12B76A;
  --color-success-tint: #E3F9EE;
  --color-warn: #B45309;
  --color-warn-tint: #FCEEDC;
  --color-danger: #C23A2E;
  --color-danger-tint: #FBE7E4;

  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 9px;
  --max-width: 1160px;

  --shadow-card: 0 1px 2px rgba(16,24,43,.04), 0 12px 28px -16px rgba(16,24,43,.16);
  --shadow-cta: 0 10px 24px -8px rgba(47,111,234,.4);
  --shadow-header: 0 1px 0 rgba(16,24,43,.06);

  --font-display: 'Manrope', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary-dark); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2.5px solid var(--color-primary); outline-offset: 2px; border-radius: 4px;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }

h1, h2, h3 {
  font-family: var(--font-display); font-weight: 800; letter-spacing: -0.01em; line-height: 1.3; color: var(--color-ink);
}
h1 { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.5rem); line-height: 1.25; }
h2 { font-size: clamp(1.35rem, 1.15rem + 0.8vw, 1.85rem); margin-top: 0; }
h3 { font-size: 1.15rem; margin-top: 0; }
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

/* ============ Header ============ */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(243,246,252,.9);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-header);
  border-bottom: 1px solid var(--color-line);
}
.site-header .container { height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.site-logo { display: flex; align-items: center; }
.site-logo__img { height: 30px; width: auto; display: block; }

.site-nav { display: flex; align-items: center; gap: 1.75rem; }
.site-nav__list { list-style: none; display: flex; gap: 1.6rem; margin: 0; padding: 0; }
.site-nav__list a {
  color: var(--color-ink-soft); text-decoration: none; font-size: .92rem; font-weight: 500;
  padding: .3rem 0; border-bottom: 2px solid transparent; transition: color .15s, border-color .15s; white-space: nowrap;
}
.site-nav__list a:hover, .site-nav__list a.active { color: var(--color-primary-dark); border-color: var(--color-primary); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--color-line-strong); border-radius: var(--radius-sm);
  width: 40px; height: 40px; align-items: center; justify-content: center; cursor: pointer; color: var(--color-ink);
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 860px) {
  .site-nav__list { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-nav.is-open .site-nav__list {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 68px; left: 0; right: 0; background: var(--color-surface);
    padding: .5rem 1.25rem 1rem; box-shadow: var(--shadow-card); border-bottom: 1px solid var(--color-line);
  }
  .site-nav.is-open .site-nav__list a { display: block; padding: .65rem 0; border-bottom: 1px solid var(--color-line); }
}

/* ============ Buttons / CTA ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-display); font-weight: 700; font-size: .95rem;
  padding: .8rem 1.4rem; border-radius: 999px; border: 2px solid transparent;
  text-decoration: none; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-cta); }
.btn--primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); }
.btn--ghost { background: transparent; border-color: var(--color-line-strong); color: var(--color-ink); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary-dark); }
.btn--sm { padding: .55rem 1.05rem; font-size: .85rem; }
.btn--on-dark { background: #fff; color: var(--color-primary-dark); box-shadow: 0 8px 20px -8px rgba(0,0,0,.35); }
.btn--on-dark:hover { background: var(--color-primary-tint); }

.cta-block {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg); padding: 2rem; color: #fff;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem;
  margin: 2.25rem 0; position: relative; overflow: hidden;
}
.cta-block::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 88% 20%, rgba(18,183,106,.28), transparent 55%);
  pointer-events: none;
}
.cta-block__text { max-width: 620px; position: relative; }
.cta-block__eyebrow { font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: #CFE0FF; opacity: .95; margin-bottom: .4rem; }
.cta-block__title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 800; margin: 0 0 .35rem; color: #fff; }
.cta-block__desc { margin: 0; color: rgba(255,255,255,.85); font-size: .95rem; }
.cta-block__action { position: relative; flex-shrink: 0; }
.cta-block--compact { padding: 1.35rem 1.5rem; }
.cta-block--compact .cta-block__title { font-size: 1.05rem; }

/* ============ Hero ============ */
.hero { padding: 3rem 0 2.5rem; background: radial-gradient(ellipse 900px 420px at 82% -10%, rgba(47,111,234,.1), transparent 60%); }
.hero .container { display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: center; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--color-primary-tint); color: var(--color-primary-dark);
  font-size: .8rem; font-weight: 700; padding: .35rem .75rem; border-radius: 999px; margin-bottom: 1rem;
  border: 1px solid #CFE0FF;
}
.hero__title { margin: 0 0 .9rem; }
.hero__subtitle { color: var(--color-ink-soft); font-size: 1.05rem; max-width: 640px; }
.hero__meta { color: var(--color-ink-faint); font-size: .85rem; margin-top: 1rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .85rem; margin-top: 1.5rem; }

/* Signature element: transparency-index dual gauge (SVG ring per entity) */
.gauge-pair { display: flex; gap: 1.75rem; justify-content: center; align-items: flex-end; }
.gauge { display: flex; flex-direction: column; align-items: center; gap: .6rem; }
.gauge__ring { position: relative; width: 116px; height: 116px; }
.gauge__ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.gauge__ring circle.track { stroke: var(--color-line-strong); }
.gauge__ring circle.value { stroke: var(--color-ink-faint); stroke-linecap: round; transition: stroke-dashoffset 1s ease; }
.gauge--accent .gauge__ring circle.value { stroke: var(--color-accent); filter: drop-shadow(0 0 5px rgba(18,183,106,.35)); }
.gauge__score { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; color: var(--color-ink); }
.gauge__name { font-size: .85rem; font-weight: 600; color: var(--color-ink-soft); }
.gauge__tag { font-size: .72rem; color: var(--color-ink-faint); }
.hero__visual { display: flex; flex-direction: column; align-items: center; gap: .85rem; }
.hero__visual-label { font-size: .78rem; color: var(--color-ink-faint); text-align: center; }

@media (min-width: 860px) {
  .hero .container { grid-template-columns: 1.15fr .85fr; }
  .hero__visual { align-items: flex-end; }
}

/* ============ Sections ============ */
.section { padding: 2.75rem 0; }
.section--alt { background: var(--color-surface); border-top: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); }
.section__lede { color: var(--color-ink-soft); margin-bottom: 1.25rem; }
.section__label { display: block; font-size: .8rem; font-weight: 700; color: var(--color-primary-dark); text-transform: uppercase; letter-spacing: .05em; margin-bottom: .5rem; }
article.page-body > .section:first-child { padding-top: 1rem; }

.freshness {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .82rem; color: var(--color-ink-faint); background: var(--color-surface-2);
  padding: .35rem .75rem; border-radius: 999px; margin-bottom: 1.5rem; border: 1px solid var(--color-line);
}
.freshness svg { width: 15px; height: 15px; color: var(--color-primary); }

/* ============ Stat grid (infographic) ============ */
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin: 1.5rem 0; }
.stat-tile { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow-card); }
.stat-tile__icon {
  width: 38px; height: 38px; border-radius: var(--radius-sm); background: var(--color-primary-tint);
  color: var(--color-primary); display: flex; align-items: center; justify-content: center; margin-bottom: .75rem;
}
.stat-tile__icon svg { width: 20px; height: 20px; }
.stat-tile__value { font-family: var(--font-display); font-size: 1.6rem; font-weight: 800; color: var(--color-ink); }
.stat-tile__label { font-size: .85rem; color: var(--color-ink-soft); margin-top: .2rem; }
@media (min-width: 640px) { .stat-grid--4 { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 640px) { .stat-grid--3 { grid-template-columns: repeat(3, 1fr); } }

/* ============ Step flow (infographic) ============ */
.step-flow { display: grid; gap: 1rem; margin: 1.5rem 0; counter-reset: step; }
.step-flow__item {
  display: flex; gap: 1rem; align-items: flex-start; background: var(--color-surface);
  border: 1px solid var(--color-line); border-radius: var(--radius); padding: 1rem 1.15rem; box-shadow: var(--shadow-card);
}
.step-flow__num {
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%; background: var(--color-primary);
  color: #fff; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800;
}
.step-flow__body { padding-top: .2rem; }
.step-flow__body p { margin: 0; }
@media (min-width: 720px) { .step-flow { grid-template-columns: repeat(2, 1fr); } }

/* Keep semantic <ol>/<ul> for real steps; style them directly too */
.steps-list { margin: 1.5rem 0; padding-left: 0; list-style: none; counter-reset: steplist; display: grid; gap: .85rem; }
.steps-list > li {
  counter-increment: steplist; position: relative; padding: .9rem 1.1rem .9rem 3.1rem;
  background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); box-shadow: var(--shadow-card);
}
.steps-list > li::before {
  content: counter(steplist); position: absolute; left: .9rem; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%; background: var(--color-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; font-size: .9rem;
}

/* ============ Icon grid / use-case cards ============ */
.icon-grid { display: grid; gap: 1rem; margin: 1.5rem 0; }
.icon-card {
  background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 1.1rem 1.25rem; box-shadow: var(--shadow-card); display: flex; gap: .85rem; align-items: flex-start;
}
.icon-card__icon { flex-shrink: 0; width: 34px; height: 34px; border-radius: var(--radius-sm); background: var(--color-primary-tint); color: var(--color-primary); display: flex; align-items: center; justify-content: center; }
.icon-card__icon svg { width: 18px; height: 18px; }
.icon-card strong { display: block; margin-bottom: .2rem; color: var(--color-ink); }
@media (min-width: 720px) { .icon-grid--2 { grid-template-columns: repeat(2, 1fr); } }

/* Plain content lists (bulleted, non-card) still get a custom marker */
.page-body ul:not(.steps-list):not(.icon-grid) { padding-left: 0; list-style: none; display: grid; gap: .55rem; margin: 1.25rem 0; }
.page-body ul:not(.steps-list):not(.icon-grid) > li { position: relative; padding-left: 1.6rem; }
.page-body ul:not(.steps-list):not(.icon-grid) > li::before {
  content: ''; position: absolute; left: 0; top: .45em; width: 9px; height: 9px; border-radius: 3px; background: var(--color-primary);
}
.page-body ol:not(.steps-list) { padding-left: 1.3rem; display: grid; gap: .5rem; margin: 1.25rem 0; }

/* ============ Tables ============ */
.table-scroll { overflow-x: auto; margin: 1.5rem 0; border-radius: var(--radius); border: 1px solid var(--color-line); box-shadow: var(--shadow-card); }
table { width: 100%; border-collapse: collapse; background: var(--color-surface); font-size: .92rem; min-width: 480px; }
caption { caption-side: top; text-align: left; padding: .75rem 1rem 0; font-size: .82rem; color: var(--color-ink-faint); }
th, td { padding: .75rem .9rem; text-align: left; border-bottom: 1px solid var(--color-line); }
thead th { background: var(--color-surface-2); font-family: var(--font-display); font-weight: 700; color: var(--color-ink); white-space: nowrap; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--color-primary-tint); }
td:first-child, th:first-child { font-weight: 600; }
.compare-table th.col-highlight, .compare-table td.col-highlight { background: var(--color-primary-tint); position: relative; }
.compare-table th.col-highlight { color: var(--color-primary-dark); }

/* ============ Callouts / verdicts ============ */
.callout { display: flex; gap: .85rem; padding: 1.1rem 1.25rem; border-radius: var(--radius); margin: 1.5rem 0; border: 1px solid transparent; }
.callout__icon { flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.callout__icon svg { width: 17px; height: 17px; }
.callout p { margin: 0; }
.callout p + p { margin-top: .5rem; }
.callout--success { background: var(--color-success-tint); border-color: #bfe9d7; }
.callout--success .callout__icon { background: var(--color-success); color: #fff; }
.callout--warn { background: var(--color-warn-tint); border-color: #f2d6ab; }
.callout--warn .callout__icon { background: var(--color-warn); color: #fff; }
.callout--danger { background: var(--color-danger-tint); border-color: #f0c3bd; }
.callout--danger .callout__icon { background: var(--color-danger); color: #fff; }
.callout--info { background: var(--color-surface-2); border-color: var(--color-line-strong); }
.callout--info .callout__icon { background: var(--color-ink-soft); color: #fff; }

/* ============ Split card (pros/cons) ============ */
.split-card { display: grid; gap: 1rem; margin: 1.5rem 0; }
.split-card__col { border-radius: var(--radius); padding: 1.1rem 1.25rem; border: 1px solid var(--color-line); }
.split-card__col--pro { background: var(--color-success-tint); border-color: #bfe9d7; }
.split-card__col--con { background: var(--color-warn-tint); border-color: #f2d6ab; }
.split-card__title { display: flex; align-items: center; gap: .5rem; font-family: var(--font-display); font-weight: 800; margin-bottom: .65rem; }
.split-card__title svg { width: 18px; height: 18px; }
.split-card ul { margin: 0; }
@media (min-width: 720px) { .split-card { grid-template-columns: 1fr 1fr; } }

/* ============ FAQ ============ */
.faq { margin: 1.5rem 0; display: grid; gap: .65rem; }
.faq-item { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); padding: .2rem .25rem; box-shadow: var(--shadow-card); }
.faq-item summary {
  cursor: pointer; list-style: none; font-family: var(--font-display); font-weight: 700;
  padding: .9rem 1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: ''; flex-shrink: 0; width: 10px; height: 10px; border-right: 2px solid var(--color-ink-faint); border-bottom: 2px solid var(--color-ink-faint);
  transform: rotate(45deg); transition: transform .2s ease;
}
.faq-item[open] summary::after { transform: rotate(-135deg); border-color: var(--color-primary); }
.faq-item p { padding: 0 1rem 1rem; margin: 0; color: var(--color-ink-soft); }

/* ============ Badges ============ */
.badge { display: inline-flex; align-items: center; gap: .3rem; font-size: .78rem; font-weight: 600; padding: .25rem .6rem; border-radius: 999px; }
.badge--primary { background: var(--color-primary-tint); color: var(--color-primary-dark); }
.badge--accent { background: var(--color-accent-tint); color: var(--color-accent-dark); }
.badge--outline { border: 1px solid var(--color-line-strong); color: var(--color-ink-soft); }

/* ============ Price highlight row ============ */
.price-highlight { display: grid; gap: .75rem; margin: 1.5rem 0; grid-template-columns: repeat(2, 1fr); }
.price-highlight__item { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); padding: 1rem; text-align: center; box-shadow: var(--shadow-card); }
.price-highlight__value { font-family: var(--font-display); font-size: 1.35rem; font-weight: 800; color: var(--color-primary-dark); }
.price-highlight__label { font-size: .82rem; color: var(--color-ink-soft); margin-top: .2rem; }
@media (min-width: 640px) { .price-highlight { grid-template-columns: repeat(4, 1fr); } }

/* ============ Breadcrumb-ish next/related links ============ */
.related-link { display: block; margin: 2rem 0; padding: 1rem 1.15rem; border: 1px dashed var(--color-line-strong); border-radius: var(--radius); color: var(--color-ink-soft); text-decoration: none; font-size: .92rem; }
.related-link strong { color: var(--color-primary-dark); }
.related-link:hover { border-color: var(--color-primary); background: var(--color-primary-tint); }

/* ============ Standard/legal pages ============ */
.legal-page { max-width: 760px; margin: 0 auto; }

/* ============ Footer ============ */
.site-footer { background: #0B1730; color: rgba(255,255,255,.72); padding: 2.75rem 0 1.5rem; margin-top: 3rem; }
.site-footer a { color: rgba(255,255,255,.82); text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; gap: 1.75rem; }
.footer-grid__brand { max-width: 320px; }
.footer-grid__brand .site-logo__img { filter: brightness(0) invert(1); }
.footer-grid__brand p { font-size: .85rem; color: rgba(255,255,255,.55); margin-top: .85rem; }
.footer-cols { display: grid; gap: 1.5rem; grid-template-columns: 1fr; max-width: 220px; }
.footer-col h4 { font-family: var(--font-display); font-size: .85rem; color: #fff; margin: 0 0 .75rem; text-transform: uppercase; letter-spacing: .04em; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.footer-col ul a { font-size: .88rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 2rem; padding-top: 1.25rem; font-size: .8rem; color: rgba(255,255,255,.45); display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; justify-content: space-between; }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.1fr 1fr; } }

/* ============ Utility ============ */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }