/* 如知AI · GEO 设计系统 — Components (blueprint)
   全部 .rz-* 前缀；可被首页与各落地页复用。配合 tokens.css 使用。 */

.rz { color: var(--rz-ink); font-family: var(--rz-font); }
.rz *, .rz *::before, .rz *::after { box-sizing: border-box; }

.rz-container {
  width: min(100% - (var(--rz-gutter) * 2), var(--rz-maxw));
  margin-inline: auto;
}

/* 网格纸背景 */
.rz-grid-bg {
  background:
    linear-gradient(90deg, var(--rz-grid) 1px, transparent 1px),
    linear-gradient(180deg, var(--rz-grid) 1px, transparent 1px),
    var(--rz-paper);
  background-size: var(--rz-grid-size) var(--rz-grid-size);
}

/* ---------- 文字原子 ---------- */
.rz-kicker, .rz-label, .rz-num {
  display: inline-block;
  font-family: var(--rz-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rz-muted);
}
.rz-kicker { color: var(--rz-accent); }

.rz-display {
  margin: 0;
  font-size: var(--rz-display);
  font-weight: 850;
  line-height: 0.96;
  letter-spacing: -0.045em;
  color: var(--rz-ink);
}
.rz-h2 {
  margin: 0;
  font-size: var(--rz-h2);
  font-weight: 820;
  line-height: 1.04;
  letter-spacing: -0.035em;
}
.rz-h3 { margin: 0; font-size: var(--rz-h3); font-weight: 720; line-height: 1.3; letter-spacing: -0.01em; }
.rz-lead { margin: 0; font-size: var(--rz-lead); line-height: 1.85; color: var(--rz-ink-2); }
.rz-muted { color: var(--rz-muted); line-height: 1.8; margin: 0; }
.rz-mark { color: var(--rz-accent); }

/* ---------- 按钮 ---------- */
.rz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.85rem 1.3rem;
  border: 1px solid var(--rz-ink);
  border-radius: var(--rz-radius);
  font-weight: 760;
  font-size: 0.96rem;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.rz-btn:active { transform: translateY(1px); }
.rz-btn--ink { background: var(--rz-ink); color: #fff; }
.rz-btn--ink:hover { background: #000; }
.rz-btn--accent { background: var(--rz-accent); border-color: var(--rz-accent); color: var(--rz-accent-ink); }
.rz-btn--accent:hover { filter: brightness(1.08); }
.rz-btn--outline { background: transparent; color: var(--rz-ink); }
.rz-btn--outline:hover { background: var(--rz-ink); color: #fff; }

/* ---------- 区块 ---------- */
.rz-section { padding: clamp(3.5rem, 7vw, 6.5rem) 0; }
.rz-section--tight { padding: clamp(2.4rem, 5vw, 4rem) 0; }
.rz-section--paper { background: var(--rz-paper); }
.rz-section--soft { background: var(--rz-soft); }
/* 段头：居中——kicker / H2 / 描述 自上而下居中，H2 横向居中铺在中部，描述在 H2 下方 */
.rz-section-head {
  text-align: center;
  margin: 0 auto clamp(1.8rem, 4vw, 3rem);
}
.rz-section-head > .rz-kicker { margin-bottom: 0.9rem; }
.rz-section-head > .rz-lead { margin: 1.1rem auto 0; max-width: 72ch; }

/* 通用 1px 网格面板容器：子项间用 1px line 描边 */
.rz-grid-frame {
  display: grid;
  gap: 1px;
  background: var(--rz-line);
  border: 1px solid var(--rz-line);
}
.rz-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rz-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.rz-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.rz-panel { background: var(--rz-panel); }
.rz-cell {
  min-width: 0;
  padding: clamp(1.35rem, 2.4vw, 2rem);
  background: var(--rz-paper);
}

/* ---------- Hero ---------- */
.rz-hero { padding: clamp(7rem, 10vw, 9rem) 0 clamp(2.5rem, 5vw, 4rem); }
.rz-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.6fr);
  gap: 1px;
  border: 1px solid var(--rz-line);
  background: var(--rz-line);
}
.rz-hero-main { background: rgba(251, 251, 250, 0.97); padding: clamp(1.8rem, 4vw, 3.2rem); }
.rz-hero-aside { background: rgba(251, 251, 250, 0.97); display: grid; }
.rz-hero .rz-display { margin-top: 1rem; max-width: 24ch; font-size: clamp(2.35rem, 4.7vw, 4.4rem); }
.rz-hero .rz-lead { margin-top: 1.6rem; max-width: 56ch; }
.rz-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.8rem; }

/* chips */
.rz-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
.rz-chips span {
  font-family: var(--rz-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--rz-ink-2);
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--rz-line);
  background: var(--rz-soft);
}

/* KPI 竖排（hero aside） */
.rz-kpis { display: grid; grid-template-columns: 1fr; height: 100%; }
.rz-kpi {
  display: grid;
  align-content: end;
  min-height: 8.4rem;
  padding: 1.2rem;
  border-bottom: 1px solid var(--rz-line);
  background:
    repeating-linear-gradient(135deg, var(--rz-grid-strong) 0, var(--rz-grid-strong) 1px, transparent 1px, transparent 11px),
    var(--rz-soft);
}
.rz-kpi:nth-child(even) { background: rgba(251, 251, 250, 0.97); }
.rz-kpi:last-child { border-bottom: 0; }
.rz-kpi strong { display: block; font-size: clamp(1.5rem, 2.6vw, 2.3rem); line-height: 1; letter-spacing: -0.03em; margin-bottom: 0.4rem; }
.rz-kpi span { color: var(--rz-muted); font-size: 0.92rem; line-height: 1.5; }

/* ---------- Proof strip ---------- */
.rz-strip {
  border-block: 1px solid var(--rz-line);
  background: var(--rz-ink-panel);
}
.rz-strip-inner {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 4vw, 3rem);
  padding: 1.2rem 0;
  align-items: center;
  justify-content: space-between;
}
.rz-strip-item { color: #f3f3f0; font-size: 0.94rem; display: flex; gap: 0.6rem; align-items: baseline; }
.rz-strip-item strong { font-size: 1.5rem; letter-spacing: -0.02em; color: #fff; }
.rz-strip-item span { color: rgba(255, 255, 255, 0.66); }

/* ---------- Step flow / 闭环 ---------- */
.rz-flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; background: var(--rz-line); border: 1px solid var(--rz-line); }
.rz-step { background: var(--rz-paper); padding: 1.4rem 1.25rem; display: grid; align-content: start; gap: 0.55rem; position: relative; }
.rz-step-num { color: var(--rz-ink); margin-bottom: 1.6rem; }
.rz-step--out .rz-step-num { color: var(--rz-accent); }
.rz-step--out { background: var(--rz-accent-tint); }
.rz-step p { color: var(--rz-muted); font-size: 0.95rem; line-height: 1.7; margin: 0; }
.rz-step .rz-step-link { font-family: var(--rz-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--rz-accent); text-decoration: none; margin-top: 0.4rem; }
.rz-step .rz-step-link:hover { text-decoration: underline; }

/* ---------- 卡片网格 ---------- */
.rz-cell h3 { margin: 0 0 0.6rem; }
.rz-cell .rz-num { display: block; margin-bottom: 0.9rem; color: var(--rz-faint); }
.rz-cell p { color: var(--rz-muted); line-height: 1.75; margin: 0; font-size: 0.97rem; }
a.rz-cell { text-decoration: none; color: inherit; transition: background 0.18s ease; }
a.rz-cell:hover { background: #fff; }
a.rz-cell .rz-cell-go { font-family: var(--rz-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--rz-accent); margin-top: 0.9rem; display: inline-block; }

/* ---------- 定价 ---------- */
.rz-price-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--rz-line); border: 1px solid var(--rz-line); }
.rz-price { background: var(--rz-paper); padding: clamp(1.5rem, 3vw, 2.2rem); display: flex; flex-direction: column; }
.rz-price--featured { background: var(--rz-ink-panel); color: #f3f3f0; }
.rz-price--featured h3, .rz-price--featured .rz-amount { color: #fff; }
.rz-price--featured .rz-price-list li { color: rgba(255,255,255,0.78); border-color: rgba(255,255,255,0.12); }
.rz-price-tag { font-family: var(--rz-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--rz-accent); margin-bottom: 0.8rem; }
.rz-price--featured .rz-price-tag { color: #fff; background: var(--rz-accent); padding: 0.2rem 0.5rem; align-self: flex-start; }
.rz-amount { font-size: clamp(2rem, 3.4vw, 2.7rem); font-weight: 840; letter-spacing: -0.03em; margin: 0.4rem 0 1rem; }
.rz-amount small { font-size: 0.9rem; font-weight: 500; color: var(--rz-muted); }
.rz-price-list { list-style: none; margin: 0 0 1.4rem; padding: 0; flex: 1; }
.rz-price-list li { padding: 0.6rem 0; border-top: 1px solid var(--rz-line); font-size: 0.94rem; line-height: 1.5; }
.rz-price-list li:first-child { border-top: 0; }

/* ---------- 清单 ---------- */
.rz-list { list-style: none; margin: 0.6rem 0 0; padding: 0; }
.rz-list li { padding: 0.62rem 0; border-top: 1px solid var(--rz-line); color: var(--rz-ink-2); line-height: 1.65; font-size: 0.96rem; }
.rz-list li:first-child { border-top: 0; }
.rz-list li small { display: block; margin-top: 0.2rem; color: var(--rz-muted); font-size: 0.86rem; }

/* ---------- 链接清单（FAQ/文章入口） ---------- */
.rz-group-title { font-family: var(--rz-mono); font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--rz-muted); margin: 1.8rem 0 0.7rem; }
.rz-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--rz-line); border: 1px solid var(--rz-line); }
.rz-links a { background: var(--rz-paper); padding: 0.9rem 1.1rem; color: var(--rz-ink-2); text-decoration: none; font-size: 0.93rem; line-height: 1.55; transition: background 0.16s ease, color 0.16s ease; }
.rz-links a:hover { background: #fff; color: var(--rz-accent); }
@media (max-width: 640px) { .rz-links { grid-template-columns: 1fr; } }

/* ---------- FAQ ---------- */
.rz-faq { display: grid; gap: 1px; background: var(--rz-line); border: 1px solid var(--rz-line); }
.rz-faq-item { background: var(--rz-paper); }
.rz-faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.2rem clamp(1rem, 2vw, 1.6rem);
  background: transparent; border: 0; cursor: pointer;
  font-size: 1.02rem; font-weight: 680; color: var(--rz-ink); text-align: left;
}
.rz-faq-q svg { width: 20px; height: 20px; flex: none; transition: transform 0.2s ease; fill: none; stroke: var(--rz-muted); stroke-width: 2; }
.rz-faq-q[aria-expanded="true"] svg { transform: rotate(180deg); }
.rz-faq-a { padding: 0 clamp(1rem, 2vw, 1.6rem) 1.3rem; }
.rz-faq-a p { margin: 0; color: var(--rz-muted); line-height: 1.85; }

/* ---------- Final CTA ---------- */
.rz-final { background: var(--rz-ink-panel); color: #fff; }
.rz-final-inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1.5rem; align-items: center; padding: clamp(2.4rem, 5vw, 4rem) 0; }
.rz-final .rz-kicker { color: #fff; }
.rz-final h2 { color: #fff; margin: 0.6rem 0 0.6rem; }
.rz-final p { color: rgba(255, 255, 255, 0.72); margin: 0; max-width: 60ch; line-height: 1.8; }
.rz-final .rz-btn--ink { background: #fff; color: var(--rz-ink); border-color: #fff; }
.rz-final .rz-btn--ink:hover { background: #f0f0ec; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .rz-hero-grid { grid-template-columns: 1fr; }
  .rz-kpis { grid-template-columns: repeat(2, 1fr); }
  .rz-kpi { border-right: 1px solid var(--rz-line); }
  .rz-kpi:nth-child(even) { border-right: 0; }
  .rz-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rz-cols-3, .rz-cols-4, .rz-price-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rz-final-inner { grid-template-columns: 1fr; align-items: start; }
}
@media (max-width: 640px) {
  .rz-hero { padding-top: 6rem; }
  .rz-kpis, .rz-flow, .rz-cols-2, .rz-cols-3, .rz-cols-4, .rz-price-grid { grid-template-columns: 1fr; }
  .rz-kpi { border-right: 0; }
  .rz-actions { display: grid; }
  .rz-actions .rz-btn { width: 100%; }
  .rz-strip-inner { gap: 0.8rem 1.4rem; }
}