/* 宣发页模板样式 — 干净克制，单强调色 + 大量留白，移动端优先 */
/* 强调色默认深蓝 #2b4c7e，复制到具体项目时可整站替换 */

:root {
  --accent: #2b4c7e;
  --ink: #22242a;
  --muted: #6b7078;
  --paper: #ffffff;
  --line: #e4e6ea;
  --font-display: "Playfair Display", "Noto Serif SC", Georgia, serif;
  --font-body: "Noto Serif SC", "Lora", Georgia, serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

/* ---------- Hero ---------- */
.hero { padding: 96px 24px 64px; }

.hero-inner { max-width: 720px; margin: 0 auto; text-align: center; }

.kicker {
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.2;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.hero-sub {
  font-size: 18px;
  color: var(--muted);
  margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 16px;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.88; text-decoration: none; }

.btn-ghost {
  display: inline-block;
  padding: 14px 32px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font-size: 16px;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.hero-cover {
  border-radius: 8px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
  margin: 0 auto;
}

/* ---------- 通用 section ---------- */
.section { padding: 72px 24px; }

.section-inner { max-width: 960px; margin: 0 auto; }

.section-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: 0.03em;
}

.section:nth-child(even) { background: #fafafb; }

/* ---------- 亮点网格 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.feature-card:hover { box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06); transform: translateY(-2px); }

.feature-icon { width: 28px; height: 28px; color: var(--accent); margin-bottom: 16px; }

.feature-title { font-size: 18px; font-weight: 600; margin-bottom: 8px; }

.feature-text { font-size: 15px; color: var(--muted); }

/* ---------- 截图区 ---------- */
.shot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.shot { border-radius: 8px; overflow: hidden; border: 1px solid var(--line); }
.shot img { width: 100%; }
.shot figcaption {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--muted);
  background: #fff;
  text-align: center;
}

/* ---------- 证据区 ---------- */
.proof-quote {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.5;
  text-align: center;
  max-width: 640px;
  margin: 0 auto 16px;
}

.proof-source { text-align: center; color: var(--muted); font-size: 15px; }

/* ---------- 底部 CTA ---------- */
.bottom-cta { text-align: center; }

.bottom-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 600;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.back-link { margin-top: 28px; font-size: 15px; color: var(--muted); }
.back-link a { color: var(--muted); }
.back-link a:hover { color: var(--accent); }

/* ---------- 页脚 ---------- */
.footer {
  padding: 32px 24px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}
.footer a { color: var(--muted); }
.footer a:hover { color: var(--accent); }

/* ---------- 移动端微调 ---------- */
@media (max-width: 640px) {
  .hero { padding: 64px 20px 48px; }
  .section { padding: 56px 20px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-ghost { width: 100%; text-align: center; }
}