:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f1f3f7;
  --border: #e6e8ee;
  --border-strong: #d5d9e2;
  --text: #0f172a;
  --text-2: #475569;
  --text-muted: #8a93a6;
  --primary: #4f46e5;
  --primary-600: #4338ca;
  --primary-soft: #eef2ff;
  --accent: #0ea5a4;
  --accent-soft: #e6fbfa;
  --amber: #b45309;
  --amber-soft: #fdf3e3;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 12px rgba(16, 24, 40, 0.05);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 14.5px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------------------------------------------------------------------------
   Header
--------------------------------------------------------------------------- */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1.5rem;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: saturate(180%) blur(10px);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.logo {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, #6366f1, #0ea5a4);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}
.brand-text .brand-name { margin: 0; font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; }
.brand-text p { margin: 0; font-size: 0.74rem; color: #9aa3b2; }

/* ---------------------------------------------------------------------------
   Header nav
--------------------------------------------------------------------------- */
.nav { display: flex; align-items: center; gap: 1.1rem; }
.nav a {
  color: #cbd2dd;
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav a:hover { color: #fff; }

.header-right { display: flex; align-items: center; gap: 0.8rem; }
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.36rem 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  color: #fff;
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
}
.lang-switch:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.38);
}
.lang-switch svg { display: block; flex: none; }

.login-btn {
  padding: 0.36rem 0.95rem;
  border-radius: 999px;
  background: #fff;
  color: #0f172a;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s, transform 0.05s;
}
.login-btn:hover { background: #e6e9f0; }
.login-btn:active { transform: translateY(1px); }
#user-box { display: flex; align-items: center; gap: 0.6rem; font-size: 0.82rem; color: #cbd2dd; }
#user-box button { padding: 0.32rem 0.7rem; font-size: 0.78rem; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.16); }
#user-box button:hover { background: rgba(255,255,255,0.18); }

/* ---------------------------------------------------------------------------
   Layout
--------------------------------------------------------------------------- */
main {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.card h2 {
  margin: 0 0 0.2rem;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.card h2 .step {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
}
.card .sub { margin: 0 0 1.1rem; font-size: 0.82rem; color: var(--text-muted); }

/* ---------------------------------------------------------------------------
   Forms
--------------------------------------------------------------------------- */
form { display: flex; flex-direction: column; gap: 0.85rem; }
form label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.82rem; font-weight: 500; color: var(--text-2); }
input, select {
  padding: 0.56rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}
input[type="file"] { padding: 0.5rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.85rem; }

/* ---------------------------------------------------------------------------
   Buttons
--------------------------------------------------------------------------- */
button {
  padding: 0.55rem 1.05rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 0.87rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s, transform 0.05s;
}
button:hover { background: var(--primary-600); }
button:active { transform: translateY(1px); }
button:disabled { background: var(--border-strong); color: var(--text-muted); cursor: not-allowed; transform: none; }
button.secondary { background: var(--accent); }
button.secondary:hover { background: #0d8c8b; }
button.ghost {
  background: var(--surface);
  color: var(--text-2);
  border-color: var(--border-strong);
}
button.ghost:hover { background: var(--surface-2); color: var(--text); }

.tabs { display: inline-flex; gap: 0.25rem; padding: 0.25rem; background: var(--surface-2); border-radius: 10px; margin-bottom: 1.1rem; }
.tabs button { background: transparent; color: var(--text-2); padding: 0.4rem 1.1rem; }
.tabs button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.tabs button:hover { background: var(--surface); }

.actions { display: flex; gap: 0.55rem; margin-bottom: 1.1rem; flex-wrap: wrap; }

/* ---------------------------------------------------------------------------
   Progress + status
--------------------------------------------------------------------------- */
.progress {
  height: 8px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  margin: 0.3rem 0 0.9rem;
}
#bar { height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, #6366f1, #0ea5a4); transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1); }

.status { font-size: 0.88rem; margin-bottom: 0.6rem; color: var(--text-2); }
.dim { color: var(--text-muted); }
.error { color: var(--danger); font-size: 0.84rem; margin-top: 0.5rem; }

#preview-url, #url { margin: 0.7rem 0; padding: 0.7rem 0.9rem; background: var(--accent-soft); border: 1px solid #c9efee; border-radius: var(--radius-sm); font-size: 0.86rem; }
#url a, #preview-url a { color: #0d6f6e; font-weight: 600; text-decoration: none; }
#url a:hover, #preview-url a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------------------
   Logs
--------------------------------------------------------------------------- */
#logs {
  background: #0f172a;
  color: #a8b3c5;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-family: ui-monospace, "SFMono-Regular", "JetBrains Mono", Consolas, monospace;
  line-height: 1.55;
  max-height: 260px;
  overflow-y: auto;
  white-space: pre-wrap;
  margin: 0;
}

/* ---------------------------------------------------------------------------
   Tables
--------------------------------------------------------------------------- */
table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }
thead th {
  text-align: left;
  padding: 0.55rem 0.65rem;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}
tbody td { padding: 0.6rem 0.65rem; border-bottom: 1px solid var(--border); color: var(--text-2); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--surface-2); }

.tag {
  display: inline-block;
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  font-size: 0.73rem;
  font-weight: 600;
  background: var(--primary-soft);
  color: var(--primary-600);
}
.tag.pillar { background: var(--amber-soft); color: var(--amber); }
.tag.done { background: var(--success-soft); color: var(--success); }
.tag.error { background: var(--danger-soft); color: var(--danger); }

/* ---------------------------------------------------------------------------
   Projects
--------------------------------------------------------------------------- */
.project-list { display: flex; flex-direction: column; gap: 0.55rem; }
.project-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.05s;
}
.project-item:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.project-item .name { font-weight: 600; }
.project-item .meta { color: var(--text-muted); font-size: 0.78rem; margin-left: auto; }

/* ---------------------------------------------------------------------------
   第一步：种子词
--------------------------------------------------------------------------- */
.discover { display: flex; flex-direction: column; gap: 1rem; }
.grid-end { align-items: end; }
.hint {
  background: var(--primary-soft);
  border: 1px solid #dbe2ff;
  border-radius: var(--radius-sm);
  padding: 0.95rem 1.05rem;
  font-size: 0.86rem;
  color: var(--text-2);
}
.hint strong { color: var(--text); }
.hint ol { margin: 0.55rem 0 0; padding-left: 1.2rem; }
.hint li { margin-bottom: 0.45rem; }
.hint code {
  background: #e0e7ff;
  color: var(--primary-600);
  padding: 0.05rem 0.4rem;
  border-radius: 5px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.8rem;
}

.seed-toolbar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border);
}
.seed-group { margin-bottom: 0.95rem; }
.seed-label { font-weight: 600; font-size: 0.82rem; margin-bottom: 0.45rem; color: var(--text-2); }
.chips { display: flex; flex-wrap: wrap; gap: 0.42rem; }
.chip {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.18rem 0.68rem;
  font-size: 0.79rem;
  color: var(--text-2);
  cursor: default;
  transition: background 0.12s, border-color 0.12s;
}
.chip:hover { background: var(--primary-soft); border-color: #c7d2fe; color: var(--primary-600); }

.hidden { display: none; }

@media (max-width: 640px) {
  main { padding: 1rem 0.75rem 3rem; }
  .card { padding: 1.1rem; }
  header { padding: 0.7rem 1rem; }
  .brand-text p { display: none; }
}

/* ---------------------------------------------------------------------------
   落地页 (Landing)
--------------------------------------------------------------------------- */
main { scroll-margin-top: 5rem; }

.hero {
  text-align: center;
  padding: 3.5rem 1.5rem 3rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 1.4rem;
}
.hero h1 {
  margin: 0 auto 1.1rem;
  max-width: 760px;
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
}
.hero h1 .grad {
  background: linear-gradient(90deg, #6366f1, #0ea5a4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin: 0 auto 1.8rem;
  max-width: 640px;
  font-size: 1.02rem;
  color: var(--text-2);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 1.8rem;
}
.hero-points {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
}
.hero-points li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 0.8rem;
  font-weight: 500;
}
.hero-points li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
}

/* 按钮（用于 <a>） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s, transform 0.05s, border-color 0.15s;
  border: 1px solid transparent;
}
.btn-lg { height: 3rem; padding: 0 1.6rem; font-size: 0.95rem; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--primary-600); }
.btn-ghost {
  background: var(--surface);
  color: var(--text-2);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.btn:active { transform: translateY(1px); }

/* 通用 section */
.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-sm);
  scroll-margin-top: 5rem;
}
.section-head { text-align: center; margin-bottom: 1.6rem; }
.section-head h2 {
  margin: 0 0 0.3rem;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.section-head p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

/* 建站流程 4 步 */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.step-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.3rem 1.2rem;
  background: var(--surface);
}
.step-card:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.step-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, #6366f1, #0ea5a4);
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 0.85rem;
}
.step-card h3 { margin: 0 0 0.45rem; font-size: 1rem; font-weight: 700; }
.step-card p { margin: 0; font-size: 0.87rem; color: var(--text-2); line-height: 1.6; }

/* 核心能力 */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.feature-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.2rem;
  background: var(--surface);
}
.feature-card h3 { margin: 0 0 0.4rem; font-size: 0.98rem; font-weight: 700; }
.feature-card p { margin: 0; font-size: 0.86rem; color: var(--text-2); line-height: 1.6; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 0.7rem; }
.faq-list details {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  overflow: hidden;
}
.faq-list summary {
  cursor: pointer;
  padding: 0.95rem 1.1rem;
  font-weight: 600;
  font-size: 0.92rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  font-weight: 700;
  color: var(--text-muted);
  font-size: 1.1rem;
}
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p {
  margin: 0;
  padding: 0 1.1rem 1rem;
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* 登录/注册卡片 */
.auth-card {
  max-width: 440px;
  margin: 0 auto;
  width: 100%;
  scroll-margin-top: 5rem;
}
.auth-card h2 { justify-content: center; font-size: 1.25rem; }
.auth-card .sub { text-align: center; }

@media (max-width: 640px) {
  .hero { padding: 2.2rem 1rem 2rem; }
  .hero h1 { font-size: 1.75rem; }
  .hero-sub { font-size: 0.95rem; }
  .section { padding: 1.5rem 1.1rem; }
  .nav { display: none; }
}