/* ============================================================
   创库 AI 官网 —— 深色现代风格（参考 numonic.ai 设计语言）
   ============================================================ */

:root {
  --bg: #0a0a10;
  --bg-soft: #0e0e16;
  --surface: #13131d;
  --surface-2: #181826;
  --border: #242436;
  --border-strong: #32324a;
  --text: #eceaf6;
  --text-soft: #c4c1d8;
  --muted: #8f8ca8;
  --accent: #6d5cff;
  --accent-2: #a855f7;
  --accent-3: #38bdf8;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 55%, #a855f7 100%);
  --radius: 14px;
  --radius-sm: 9px;
  --container: 1120px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent-2); }
img { max-width: 100%; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
code { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 0.9em; }
::selection { background: rgba(109, 92, 255, 0.4); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 22px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 999px; border: 1px solid transparent;
  font-size: 0.98rem; font-weight: 600; cursor: pointer; transition: all 0.18s ease;
  white-space: nowrap; font-family: inherit;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 28px rgba(124, 92, 255, 0.35); }
.btn-primary:hover { filter: brightness(1.12); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }
.btn-danger { background: rgba(248, 113, 113, 0.12); color: var(--danger); border-color: rgba(248, 113, 113, 0.35); }
.btn-danger:hover { background: rgba(248, 113, 113, 0.22); color: var(--danger); }
.btn-sm { padding: 7px 14px; font-size: 0.88rem; }
.btn-block { width: 100%; }

/* ---------- 顶栏 ---------- */
.nav-wrap {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 16, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; }
.brand-mark { width: 30px; height: 30px; border-radius: 9px; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-sub { font-size: 0.7rem; font-weight: 600; color: var(--muted); letter-spacing: 0.02em; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 0.95rem; }
.nav-links a { color: var(--text-soft); }
.nav-links a:hover { color: var(--text); }
.nav-links .nav-cta {
  color: #fff; background: var(--grad); padding: 8px 18px; border-radius: 999px; font-weight: 600;
}
.nav-links .nav-cta:hover { filter: brightness(1.12); color: #fff; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border-strong); border-radius: 8px; padding: 8px 9px; cursor: pointer; flex-direction: column; gap: 4px; }
.nav-toggle span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; display: block; }

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 64px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-soft); border-bottom: 1px solid var(--border);
    padding: 10px 22px 18px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 4px; border-bottom: 1px solid var(--border); }
  .nav-links a:last-child { border-bottom: none; }
  .nav-links .nav-cta { text-align: center; }
}

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg-soft); margin-top: 90px; padding: 54px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 34px; }
.footer-brand p { color: var(--muted); font-size: 0.92rem; margin-top: 14px; max-width: 300px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4 { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 6px; }
.footer-col a { color: var(--text-soft); font-size: 0.93rem; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--border);
  color: var(--muted); font-size: 0.85rem;
}
.footer-bottom a { color: var(--muted); text-decoration: none; }
.footer-bottom a:hover { color: var(--text); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- 通用区块 ---------- */
.section { padding: 78px 0 10px; }
.section-tight { padding: 46px 0 10px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent-2); font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px;
}
.lead { color: var(--muted); font-size: 1.08rem; max-width: 640px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 96px 0 70px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(600px 360px at 22% 18%, rgba(99, 102, 241, 0.20), transparent 62%),
    radial-gradient(560px 340px at 80% 8%, rgba(168, 85, 247, 0.16), transparent 62%),
    radial-gradient(500px 300px at 60% 85%, rgba(56, 189, 248, 0.08), transparent 60%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0.5;
  background-image:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 30%, transparent 75%);
}
.hero-inner { max-width: 780px; margin: 0 auto; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border-strong); background: var(--surface);
  color: var(--text-soft); font-size: 0.84rem; padding: 7px 15px; border-radius: 999px; margin-bottom: 26px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.hero h1 { margin-bottom: 20px; }
.hero .sub { color: var(--muted); font-size: 1.16rem; max-width: 620px; margin: 0 auto 34px; }
.hero .grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { color: var(--muted); font-size: 0.82rem; margin-top: 18px; }

/* ---------- 应用模拟窗口 ---------- */
.mockup {
  margin: 64px auto 0; max-width: 940px; position: relative;
}
.mockup::before {
  content: ""; position: absolute; inset: -18% -12%; z-index: -1;
  background: radial-gradient(520px 300px at 50% 40%, rgba(124, 92, 255, 0.22), transparent 70%);
  filter: blur(10px);
}
.mockup-window {
  border: 1px solid var(--border-strong); border-radius: 16px; overflow: hidden;
  background: linear-gradient(180deg, #151521, #101018);
  box-shadow: var(--shadow);
}
.mockup-bar { display: flex; align-items: center; gap: 8px; padding: 13px 16px; border-bottom: 1px solid var(--border); }
.mockup-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.mockup-bar .r { background: #f87171; } .mockup-bar .y { background: #fbbf24; } .mockup-bar .g { background: #34d399; }
.mockup-bar .addr { margin-left: 14px; color: var(--muted); font-size: 0.8rem; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 3px 14px; flex: 1; text-align: center; }
.mockup-body { display: grid; grid-template-columns: 200px 1fr; min-height: 380px; }
.mockup-side { border-right: 1px solid var(--border); padding: 20px 16px; display: flex; flex-direction: column; gap: 12px; }
.mockup-side .m-item { height: 30px; border-radius: 8px; background: var(--surface-2); }
.mockup-side .m-item.on { background: rgba(109, 92, 255, 0.28); border: 1px solid var(--accent); }
.mockup-main { padding: 20px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; align-content: start; }
.mockup-main .thumb { aspect-ratio: 4/3; border-radius: 10px; background: linear-gradient(135deg, #1d1d30, #26263d); border: 1px solid var(--border); position: relative; overflow: hidden; }
.mockup-main .thumb::after { content: ""; position: absolute; inset: 0; background: linear-gradient(160deg, transparent 40%, rgba(109,92,255,0.25)); }
.mockup-main .thumb:nth-child(3n) { background: linear-gradient(135deg, #232042, #31285a); }
.mockup-main .thumb:nth-child(4n) { background: linear-gradient(135deg, #1b2b45, #1f3a5c); }
@media (max-width: 680px) {
  .mockup-body { grid-template-columns: 1fr; }
  .mockup-side { display: none; }
  .mockup-main { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 特性卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr 1fr; } .grid-2 { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.card-icon {
  width: 42px; height: 42px; border-radius: 11px; display: flex; align-items: center; justify-content: center;
  background: rgba(109, 92, 255, 0.16); border: 1px solid rgba(109, 92, 255, 0.35); margin-bottom: 16px;
  font-size: 1.3rem;
}
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 0.94rem; margin: 0; }

/* ---------- 对比 / 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 720px; }
th, td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; background: var(--surface-2); }
tr:last-child td { border-bottom: none; }
td .yes { color: var(--ok); font-weight: 600; }
td .no { color: var(--danger); }
td .partial { color: var(--warn); }
.highlight-row td { background: rgba(109, 92, 255, 0.08); }

/* ---------- 报价 ---------- */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; align-items: stretch; }
.plan {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; display: flex; flex-direction: column; position: relative;
}
.plan.hot { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 18px 50px rgba(109, 92, 255, 0.18); }
.plan-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #fff; font-size: 0.78rem; font-weight: 700;
  padding: 4px 14px; border-radius: 999px; letter-spacing: 0.04em;
}
.plan-name { color: var(--muted); font-size: 0.92rem; font-weight: 600; }
.plan-price { font-size: 2.4rem; font-weight: 800; margin: 10px 0 2px; }
.plan-price small { font-size: 1rem; color: var(--muted); font-weight: 500; }
.plan-desc { color: var(--muted); font-size: 0.92rem; margin-bottom: 18px; }
.plan-features { list-style: none; margin: 0 0 24px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.plan-features li { display: flex; gap: 10px; font-size: 0.94rem; color: var(--text-soft); }
.plan-features li::before { content: "✓"; color: var(--ok); font-weight: 700; }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 26px 26px; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: -18px; right: 22px;
  font-size: 3rem; font-weight: 800; color: rgba(109, 92, 255, 0.16); font-family: ui-monospace, monospace;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 0.94rem; margin: 0; }

/* ---------- 引用块 / callout ---------- */
.callout {
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--surface); border-radius: var(--radius); padding: 22px 24px; margin: 26px 0;
}
.callout strong { display: block; margin-bottom: 4px; }
.quote {
  border-left: 3px solid var(--accent); padding: 4px 0 4px 20px;
  font-size: 1.15rem; color: var(--text-soft); font-style: italic; margin: 34px auto; max-width: 640px; text-align: center;
}
.quote::before, .quote::after { content: none; }

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; color: var(--text);
  font: inherit; font-weight: 600; padding: 18px 20px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-q .chev { transition: transform 0.2s ease; color: var(--muted); }
.faq-item.open .chev { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 20px 18px; color: var(--muted); font-size: 0.95rem; }
.faq-item.open .faq-a { display: block; }

/* ---------- 表单 ---------- */
.form-card { max-width: 440px; margin: 0 auto; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 7px; font-size: 0.92rem; color: var(--text-soft); }
.form-input {
  width: 100%; padding: 11px 14px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border-strong); color: var(--text);
  font: inherit; font-size: 0.98rem; transition: border-color 0.15s ease;
}
.form-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(109, 92, 255, 0.18); }
textarea.form-input { resize: vertical; min-height: 90px; }
.field-error { color: var(--danger); font-size: 0.85rem; margin-top: 5px; }
.form-hint { color: var(--muted); font-size: 0.84rem; margin-top: 6px; }
.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }

/* ---------- 数据表 / 管理 ---------- */
.status { display: inline-block; padding: 3px 11px; border-radius: 999px; font-size: 0.8rem; font-weight: 600; }
.status-pending { background: rgba(251, 191, 36, 0.14); color: var(--warn); }
.status-paid { background: rgba(52, 211, 153, 0.14); color: var(--ok); }
.status-cancelled, .status-revoked { background: rgba(248, 113, 113, 0.14); color: var(--danger); }
.status-active { background: rgba(52, 211, 153, 0.14); color: var(--ok); }
.status-normal { background: rgba(143, 140, 168, 0.16); color: var(--muted); }

.chip { display: inline-block; padding: 3px 11px; border-radius: 999px; font-size: 0.8rem; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-soft); }
.mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 0.9em; word-break: break-all; }

/* ---------- 提示 ---------- */
.alert { padding: 14px 18px; border-radius: var(--radius-sm); margin: 18px auto; max-width: var(--container); font-size: 0.95rem; }
.alert-ok { background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.35); color: var(--ok); }
.alert-error { background: rgba(248, 113, 113, 0.12); border: 1px solid rgba(248, 113, 113, 0.35); color: var(--danger); }
.alert-info { background: rgba(56, 189, 248, 0.10); border: 1px solid rgba(56, 189, 248, 0.3); color: var(--text-soft); }

/* ---------- 代码 / 激活码 ---------- */
.code-box {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 12px 16px; margin: 8px 0 14px;
}
.code-box code {
  flex: 1; min-width: 0; /* 允许 flex 子项收缩，防止长激活码撑破容器 */
  font-size: 0.95rem; color: var(--accent-3);
  word-break: break-all; line-height: 1.5; /* 长 base64 激活码自动换行，不超出边界 */
  user-select: all; /* 点选即选中整段，便于复制 */
}
.copy-btn { background: var(--surface-2); border: 1px solid var(--border-strong); color: var(--text-soft); border-radius: 8px; padding: 6px 14px; cursor: pointer; font-size: 0.85rem; font-family: inherit; white-space: nowrap; flex-shrink: 0; }
.copy-btn:hover { border-color: var(--accent); color: var(--text); }

/* 账户页授权表里的激活码单元格 */
.lic-cell { display: flex; align-items: flex-start; gap: 8px; }
.lic-code { display: block; word-break: break-all; font-size: 0.78rem; color: var(--accent-3); line-height: 1.45; user-select: all; max-width: 320px; }
.lic-cell .copy-btn { padding: 3px 10px; font-size: 0.75rem; flex-shrink: 0; }

/* ---------- 统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 800px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; text-align: center; }
.stat b { display: block; font-size: 1.8rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--muted); font-size: 0.9rem; }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative; border: 1px solid var(--border-strong); border-radius: 20px; overflow: hidden;
  padding: 58px 30px; text-align: center; margin-top: 90px;
  background: radial-gradient(520px 300px at 50% 0%, rgba(124, 92, 255, 0.22), transparent 70%), var(--surface);
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { color: var(--muted); max-width: 520px; margin: 0 auto 26px; }

/* ---------- 页头 ---------- */
.page-head { padding: 70px 0 12px; text-align: center; }
.page-head h1 { margin-bottom: 14px; }
.page-head p { color: var(--muted); max-width: 640px; margin: 0 auto; }

/* ---------- 通用工具 ---------- */
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 26px; } .mt-4 { margin-top: 44px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 26px; }
.muted { color: var(--muted); }
.small { font-size: 0.86rem; }
.flex { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.divider { border: none; border-top: 1px solid var(--border); margin: 30px 0; }

/* 细节动效 */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }