/* ══════════════════════════════════════════════════
   墨灵 InkSpirit — 官网样式
   ══════════════════════════════════════════════════ */

:root {
  --ink:       #1A1A2E;
  --spirit:    #7C5CFC;
  --spirit-l:  #A78BFA;
  --spirit-d:  #5B3FD9;
  --jade:      #10B981;
  --rose:      #F472B6;
  --gold:      #FBBF24;
  --sky:       #38BDF8;
  --mist:      #F1F5F9;
  --card:      #FFFFFF;
  --text:      #334155;
  --text-dim:  #94A3B8;
  --shadow:    0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
  --radius:    16px;
  --radius-sm: 10px;
}

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

body {
  font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--mist);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--spirit); text-decoration: none; transition: color .2s; }
a:hover { color: var(--spirit-d); }

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

/* ── 导航 ──────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,.06);
  height: 64px;
  display: flex; align-items: center;
  padding: 0 clamp(16px, 4vw, 48px);
}
.nav-brand {
  font-size: 20px; font-weight: 800;
  background: linear-gradient(135deg, var(--spirit), var(--spirit-l));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-right: auto;
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--spirit); }
.nav-links .cta-sm {
  background: var(--spirit); color: #fff !important;
  padding: 8px 20px; border-radius: 8px; font-size: 13px;
  transition: background .2s;
}
.nav-links .cta-sm:hover { background: var(--spirit-d); }

.mobile-menu { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text); }

/* 移动端菜单面板 */
.nav-links.mobile-open {
  display: flex !important;
  flex-direction: column;
  position: absolute;
  top: 64px; right: 0; left: 0;
  background: #fff;
  padding: 16px 24px;
  box-shadow: 0 8px 32px rgba(0,0,0,.1);
  gap: 4px;
  animation: slideDown .25s ease;
}
.nav-links.mobile-open a {
  padding: 12px 0;
  border-bottom: 1px solid #F1F5F9;
  font-size: 16px;
}
.nav-links.mobile-open .cta-sm {
  margin-top: 8px;
  text-align: center;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 通用容器 ──────────────────────────────────── */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; }
.section-light { background: #fff; }
.section-dark { background: var(--ink); color: #E2E8F0; }
.section-dark h2, .section-dark h3 { color: #F8FAFC; }

h1 { font-size: clamp(32px, 5vw, 52px); font-weight: 800; line-height: 1.2; }
h2 { font-size: clamp(26px, 3.5vw, 38px); font-weight: 700; margin-bottom: 16px; }
h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.subtitle { font-size: clamp(16px, 2vw, 20px); color: var(--text-dim); margin-top: 12px; line-height: 1.6; }
.section-header { text-align: center; margin-bottom: 48px; }

/* ── 按钮 ──────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-sm);
  font-size: 16px; font-weight: 600;
  border: none; cursor: pointer;
  transition: transform .15s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--spirit), var(--spirit-l));
  color: #fff; box-shadow: 0 4px 16px rgba(124,92,252,.35);
}
.btn-primary:hover { box-shadow: 0 6px 24px rgba(124,92,252,.45); color: #fff; }
.btn-outline {
  background: transparent; color: var(--spirit);
  border: 2px solid var(--spirit);
}
.btn-outline:hover { background: rgba(124,92,252,.06); color: var(--spirit); }
.btn-white {
  background: #fff; color: var(--spirit);
  box-shadow: var(--shadow);
}

/* ── Hero ──────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding-top: 64px;
  background: linear-gradient(160deg, #1A1A2E 0%, #2D1B69 40%, #7C5CFC 100%);
  color: #fff;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(124,92,252,.3) 0%, transparent 60%),
              radial-gradient(circle at 70% 30%, rgba(56,189,248,.2) 0%, transparent 50%);
}
.hero > * { position: relative; z-index: 1; }
.hero h1 { color: #fff; max-width: 700px; margin: 0 auto; }
.hero .subtitle { color: rgba(255,255,255,.75); max-width: 550px; margin: 16px auto 0; }
.hero-actions { display: flex; gap: 16px; justify-content: center; margin-top: 36px; flex-wrap: wrap; }
.hero-badges {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
  margin-top: 48px;
}
.hero-badge {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 24px;
  padding: 8px 20px;
  font-size: 14px; color: rgba(255,255,255,.9);
  backdrop-filter: blur(6px);
}

/* ── 数字统计 ──────────────────────────────────── */
.stats { display: flex; gap: 48px; justify-content: center; flex-wrap: wrap; }
.stat { text-align: center; }
.stat-num {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--spirit), var(--sky));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { font-size: 14px; color: var(--text-dim); margin-top: 4px; }

/* ── 卡片网格 ──────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.card-icon.purple { background: rgba(124,92,252,.1); }
.card-icon.green  { background: rgba(16,185,129,.1); }
.card-icon.rose   { background: rgba(244,114,182,.1); }
.card-icon.gold   { background: rgba(251,191,36,.1); }
.card-icon.sky    { background: rgba(56,189,248,.1); }
.card h3 { font-size: 18px; }
.card p { font-size: 14px; color: #64748B; margin-top: 8px; }

/* ── 对比表 ──────────────────────────────────────── */
.table-wrap { overflow-x: auto; margin-top: 24px; border-radius: var(--radius); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; background: #fff; font-size: 15px; }
thead th {
  background: var(--ink); color: #fff;
  padding: 14px 20px; text-align: left; font-weight: 600;
}
tbody td { padding: 14px 20px; border-bottom: 1px solid #F1F5F9; }
tbody tr:hover { background: #FAFAFF; }

/* ── Mermaid 图 ──────────────────────────────────── */
.diagram-box {
  background: #fff; border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow);
  margin-top: 32px; overflow-x: auto;
}
.diagram-box .mermaid { text-align: center; min-width: 600px; }
.diagram-caption {
  text-align: center; margin-top: 12px;
  font-size: 13px; color: var(--text-dim); font-style: italic;
}

/* ── 定价卡片 ──────────────────────────────────── */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.pricing-card {
  background: #fff; border-radius: var(--radius); padding: 36px;
  box-shadow: var(--shadow); text-align: center;
  border: 2px solid transparent; transition: border-color .2s;
}
.pricing-card.featured { border-color: var(--spirit); position: relative; }
.pricing-card.featured::before {
  content: '推荐'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--spirit); color: #fff; font-size: 12px; font-weight: 600;
  padding: 4px 16px; border-radius: 12px;
}
.pricing-name { font-size: 20px; font-weight: 700; }
.pricing-price { font-size: 36px; font-weight: 800; color: var(--spirit); margin: 16px 0; }
.pricing-price span { font-size: 16px; font-weight: 400; color: var(--text-dim); }
.pricing-features { list-style: none; text-align: left; margin: 20px 0; }
.pricing-features li { padding: 8px 0; font-size: 14px; color: #64748B; border-bottom: 1px solid #F1F5F9; }
.pricing-features li::before { content: '✓ '; color: var(--jade); font-weight: 700; }

/* ── 里程碑时间线 ──────────────────────────────── */
.timeline { position: relative; padding-left: 32px; margin-top: 32px; }
.timeline::before {
  content: ''; position: absolute; left: 11px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--spirit), var(--spirit-l));
}
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-dot {
  position: absolute; left: -32px; top: 4px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--spirit); border: 4px solid var(--mist);
}
.timeline-date { font-size: 13px; color: var(--spirit); font-weight: 600; }
.timeline-text { font-size: 15px; margin-top: 4px; }

/* ── 表单 ──────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid #E2E8F0;
  border-radius: var(--radius-sm); font-size: 15px; font-family: inherit;
  transition: border-color .2s;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--spirit); box-shadow: 0 0 0 3px rgba(124,92,252,.15);
}
.form-group textarea { resize: vertical; min-height: 100px; }

/* ── Footer ──────────────────────────────────────── */
.footer {
  background: var(--ink); color: #94A3B8;
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand { font-size: 22px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.footer-desc { font-size: 14px; line-height: 1.7; }
.footer h4 { color: #E2E8F0; font-size: 14px; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: #94A3B8; font-size: 14px; }
.footer ul a:hover { color: var(--spirit-l); }
.footer-bottom {
  margin-top: 40px; padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.1);
  text-align: center; font-size: 13px;
}

/* ── 占位截图 ──────────────────────────────────── */
.screenshot-placeholder {
  background: linear-gradient(135deg, #E8E8EE, #D5D5E0);
  border-radius: var(--radius); padding: 80px 24px;
  text-align: center; color: #999; font-size: 14px;
  border: 2px dashed #C5C5D0; margin-top: 24px;
}

/* ── 响应式 ──────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu { display: block; }
  section { padding: 60px 0; }
  .cards { grid-template-columns: 1fr; }
  .stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 120px 0 80px; }
  /* Mermaid 图提示可滑 */
  .diagram-box { position: relative; }
  .diagram-box::after {
    content: '← 左右滑动查看完整图表 →';
    display: block; text-align: center;
    font-size: 12px; color: var(--text-dim);
    margin-top: 8px;
  }
  /* 文档页顶部目录（替代隐藏的侧边导航）*/
  .doc-nav-mobile { display: block !important; }
}

@media print {
  .nav, .footer { display: none; }
  section { padding: 30px 0; page-break-inside: avoid; }
}
</style>