/* =============================================
   XUNDAO.XIN — Terminal Aesthetic + Leaf Infinity
   寻道心 · 叶子无限论
   Dark background + warm amber leaf gold
   Zero-framework, pure terminal CLI aesthetic
   ============================================= */

:root {
  --bg: #0a0a0a;
  --bg-alt: #0e0e0e;
  --bg-panel: #111116;
  --fg: #d4cfc4;
  --fg-dim: #6b6b60;
  --green: #7dab6f;
  --green-bright: #a8d8a0;
  --green-dim: #1a2e16;
  --amber: #c9a96e;
  --amber-bright: #d4b87a;
  --amber-dim: #2a2216;
  --red: #c96e6e;
  --red-dim: #2e1818;
  --blue: #6e9ec9;
  --blue-dim: #121e2a;
  --cyan: #6ec9b8;
  --leaf-gold: #c9a96e;
  --leaf-rust: #a07040;
  --link: #a8d8a0;
  --selection: rgba(201, 169, 110, 0.15);
  --border: #1a1a18;
  --border-fg: #2a2a25;
  --mono: "JetBrains Mono", "Cascadia Code", "Fira Code", "Consolas", "Courier New", "Source Code Pro", monospace;
  --serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", "STSong", Georgia, "Times New Roman", serif;
}

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

::selection { background: var(--selection); color: var(--fg); }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-fg); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #3a3a30; }

html {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--fg);
  font-size: 14px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background:
    linear-gradient(0deg, rgba(201,169,110,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,169,110,0.012) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
  background-position: center center;
}

/* Leaf particle effect (subtle, CSS-only) */
body::before {
  content: '';
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none; z-index: -1;
  background:
    radial-gradient(1px 1px at 10% 15%, rgba(201,169,110,0.15), transparent),
    radial-gradient(1px 1px at 85% 25%, rgba(201,169,110,0.12), transparent),
    radial-gradient(1px 1px at 30% 70%, rgba(160,112,64,0.10), transparent),
    radial-gradient(1px 1px at 70% 80%, rgba(201,169,110,0.08), transparent),
    radial-gradient(1px 1px at 50% 50%, rgba(201,169,110,0.06), transparent);
}

/* Animations */
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }
.cursor { animation: blink 1s step-end infinite; color: var(--amber); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
@keyframes leafDrift {
  0% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
  50% { transform: translateY(-8px) rotate(3deg); opacity: 0.9; }
  100% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
}
@keyframes shimmer {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}
.leaf-icon {
  display: inline-block;
  animation: leafDrift 4s ease-in-out infinite;
  color: var(--amber);
}

/* === HEADER / TOOLBAR === */
.toolbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0;
  font-size: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.toolbar-inner {
  max-width: 960px; margin: 0 auto;
  padding: 8px 16px;
  display: flex; align-items: center; gap: 0;
  overflow-x: auto;
  white-space: nowrap;
}
.toolbar-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  margin-right: 12px; flex-shrink: 0;
}
.toolbar-dot.r { background: var(--red); }
.toolbar-dot.y { background: var(--amber); }
.toolbar-dot.g { background: var(--green); }
.toolbar-title {
  color: var(--fg-dim); font-size: 11px;
  letter-spacing: 0.05em; margin-right: 20px; flex-shrink: 0;
}
.toolbar-nav { display: flex; gap: 0; }
.toolbar-nav a {
  color: var(--fg-dim); text-decoration: none;
  padding: 4px 10px; border-radius: 3px;
  font-size: 11px; transition: all .15s;
}
.toolbar-nav a:hover,
.toolbar-nav a.active {
  color: var(--amber); background: var(--amber-dim);
}
.toolbar-nav .sep {
  color: var(--border-fg); margin: 0 2px; pointer-events: none;
}

/* === MAIN LAYOUT === */
.main {
  max-width: 960px; margin: 0 auto; padding: 32px 16px 48px;
}
.section { margin-bottom: 40px; }

/* === PROMPT LINE === */
.prompt-line {
  display: flex; align-items: baseline; gap: 8px;
  margin-bottom: 8px; color: var(--fg-dim);
  font-family: var(--mono); font-size: 13px;
}
.prompt-arrow { color: var(--amber); font-weight: bold; }
.prompt-arrow.g { color: var(--green); }
.prompt-path { color: var(--blue); }
.prompt-cmd { color: var(--fg); font-weight: 600; }

/* === TYPOGRAPHY === */
h1 {
  font-size: 1.6rem; font-weight: 600; color: var(--amber);
  margin-bottom: 4px; letter-spacing: 0.03em;
  font-family: var(--serif);
}
h2 {
  font-size: 1.2rem; font-weight: 600; color: var(--amber);
  margin: 32px 0 12px; letter-spacing: 0.03em;
}
h3 {
  font-size: 1.05rem; font-weight: 600; color: var(--blue);
  margin: 20px 0 8px;
}
h4 {
  font-size: 0.95rem; font-weight: 600; color: var(--fg);
  margin: 16px 0 6px;
}

p { margin-bottom: 10px; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
strong { color: var(--fg); font-weight: 600; }
em { color: var(--amber); font-style: normal; }
code {
  background: rgba(201,169,110,0.1); color: var(--amber);
  padding: 1px 6px; border-radius: 2px; font-family: var(--mono); font-size: 0.9em;
}
pre {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: 4px; padding: 16px; overflow-x: auto;
  font-family: var(--mono); font-size: 0.88em; line-height: 1.6;
  margin-bottom: 16px;
}
pre code { background: none; color: var(--fg); padding: 0; }
pre .comment { color: var(--fg-dim); }
pre .keyword { color: var(--blue); }
pre .string { color: var(--green); }
pre .number { color: var(--amber); }

blockquote {
  border-left: 3px solid var(--amber-dim);
  padding: 8px 16px; margin: 16px 0;
  color: var(--fg-dim);
  background: rgba(201,169,110,0.04);
  font-family: var(--serif);
  font-style: italic;
}

/* === TERMINAL BOX === */
.term-box {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 4px; overflow: hidden; margin-bottom: 16px;
}
.term-box-header {
  background: #1a1a1e; padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 11px; color: var(--fg-dim);
  display: flex; align-items: center; gap: 8px;
}
.term-box-header .dots { display: flex; gap: 5px; }
.term-box-header .dot { width: 8px; height: 8px; border-radius: 50%; }
.term-box-header .label { flex: 1; }
.term-box-body { padding: 16px; }

/* === TABLE === */
.term-table {
  width: 100%; border-collapse: collapse;
  font-size: 13px; margin-bottom: 16px;
}
.term-table th {
  text-align: left; color: var(--amber);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px; font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.08em;
}
.term-table td {
  border-bottom: 1px solid var(--border);
  padding: 8px 12px; vertical-align: top;
}
.term-table tr:hover td { background: rgba(201,169,110,0.03); }

/* === PRICE TAG === */
.price-tag {
  display: inline-flex; align-items: baseline; gap: 2px;
  font-weight: 700;
}
.price-tag .yen { font-size: 0.75em; color: var(--fg-dim); }
.price-tag .num { color: var(--amber); font-size: 1.4em; }
.price-tag .label { color: var(--fg-dim); font-size: 0.75em; margin-left: 4px; }

/* === CTA BUTTON === */
.cta {
  display: inline-block; padding: 10px 24px;
  background: transparent; border: 1px solid var(--amber);
  color: var(--amber); font-family: var(--mono); font-size: 13px;
  cursor: pointer; text-decoration: none;
  transition: all .2s;
  letter-spacing: 0.03em;
}
.cta:hover {
  background: rgba(201,169,110,0.1);
  text-decoration: none;
}
.cta.green { border-color: var(--green); color: var(--green); }
.cta.green:hover { background: rgba(125,171,111,0.1); }
.cta.primary {
  background: rgba(201,169,110,0.1); border-color: var(--amber);
}
.cta.primary:hover { background: rgba(201,169,110,0.2); }
.cta.large { padding: 14px 32px; font-size: 15px; }

/* === LIST === */
.term-list { list-style: none; padding: 0; }
.term-list li {
  padding: 6px 0; padding-left: 16px; position: relative;
}
.term-list li::before {
  content: '▸'; position: absolute; left: 0;
  color: var(--amber);
}
.term-list li .num { color: var(--fg-dim); font-size: 11px; margin-right: 8px; }

/* === GRID === */
.grid-2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.grid-3 {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px;
}
.grid-4 {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}

/* === STATUS BAR === */
.status-bar {
  display: flex; gap: 16px; flex-wrap: wrap;
  font-size: 11px; color: var(--fg-dim);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 8px 0; margin: 24px 0;
}
.status-item { display: flex; align-items: center; gap: 6px; }
.status-dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
}
.status-dot.online { background: var(--green); }
.status-dot.warn { background: var(--amber); }

/* === TAG ======================================================= */
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 2px;
  font-size: 10px; font-weight: 600; letter-spacing: 0.05em;
}
.tag.amber { background: var(--amber-dim); color: var(--amber); }
.tag.green { background: var(--green-dim); color: var(--green); }
.tag.blue { background: var(--blue-dim); color: var(--blue); }
.tag.red { background: var(--red-dim); color: var(--red); }

/* === COURSE CARD === */
.course-card {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 4px; padding: 24px; transition: all .2s;
  display: flex; flex-direction: column;
}
.course-card:hover {
  border-color: var(--amber-dim);
  background: rgba(201,169,110,0.03);
}
.course-card .cc-tier {
  font-size: 10px; letter-spacing: 0.08em; color: var(--fg-dim);
  text-transform: uppercase; margin-bottom: 8px;
}
.course-card .cc-title {
  font-size: 1.1rem; font-weight: 600; color: var(--amber);
  margin-bottom: 8px;
}
.course-card .cc-price {
  font-size: 1.8rem; font-weight: 700; color: var(--amber);
  margin-bottom: 12px;
}
.course-card .cc-price .cc-yen { font-size: 0.5em; color: var(--fg-dim); }
.course-card .cc-desc {
  font-size: 13px; color: var(--fg-dim); flex: 1;
  margin-bottom: 16px;
}
.course-card .cc-features {
  list-style: none; padding: 0; margin-bottom: 16px;
  font-size: 12px; color: var(--fg-dim);
}
.course-card .cc-features li {
  padding: 3px 0; padding-left: 14px; position: relative;
}
.course-card .cc-features li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--green);
}

/* === GOLDEN QUOTE === */
.golden-quote {
  font-family: var(--serif);
  font-size: 1.15rem; color: var(--amber);
  padding: 20px 24px;
  border-left: 3px solid var(--amber);
  background: rgba(201,169,110,0.04);
  margin: 20px 0;
  letter-spacing: 0.02em;
  line-height: 1.8;
}

/* === FOUR PILLAR GRID === */
.pillar-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  margin: 24px 0;
}
.pillar-card {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 4px; padding: 24px;
  transition: all .2s;
}
.pillar-card:hover {
  border-color: var(--amber-dim);
  background: rgba(201,169,110,0.03);
}
.pillar-card .pillar-num {
  font-family: var(--mono);
  font-size: 12px; color: var(--fg-dim);
  margin-bottom: 8px; letter-spacing: 0.05em;
}
.pillar-card .pillar-title {
  font-family: var(--serif);
  font-size: 1.05rem; color: var(--amber);
  margin-bottom: 10px; font-weight: 600;
}
.pillar-card .pillar-body {
  font-size: 13px; color: var(--fg-dim);
  line-height: 1.7;
}

/* === PRICE LADDER === */
.price-ladder {
  display: flex; flex-direction: column; gap: 12px;
}
.ladder-step {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 4px; background: var(--bg-panel);
  transition: all .15s;
  text-decoration: none; color: var(--fg);
}
.ladder-step:hover {
  border-color: var(--amber-dim);
  background: rgba(201,169,110,0.04);
  text-decoration: none;
}
.ladder-step .ls-level {
  font-size: 11px; color: var(--fg-dim);
  min-width: 50px; letter-spacing: 0.04em;
}
.ladder-step .ls-name {
  flex: 1; font-weight: 600; font-size: 13px;
}
.ladder-step .ls-price {
  font-weight: 700; color: var(--amber); font-size: 14px;
  min-width: 60px; text-align: right;
}
.ladder-step .ls-arrow {
  color: var(--amber); font-size: 16px;
}

/* === EMAIL FORM === */
.email-form {
  max-width: 480px; margin: 0 auto;
}
.email-form .ef-row {
  display: flex; gap: 8px;
}
.email-form input[type="email"] {
  flex: 1;
  background: var(--bg-alt); border: 1px solid var(--border);
  color: var(--fg); padding: 12px 16px;
  font-family: var(--mono); font-size: 14px;
  border-radius: 4px;
  outline: none; transition: border-color .15s;
}
.email-form input[type="email"]:focus {
  border-color: var(--amber);
}
.email-form input[type="email"]::placeholder {
  color: var(--fg-dim);
}
.email-form button {
  padding: 12px 24px;
  background: transparent; border: 1px solid var(--amber);
  color: var(--amber); font-family: var(--mono);
  font-size: 14px; cursor: pointer; border-radius: 4px;
  transition: all .15s;
}
.email-form button:hover {
  background: rgba(201,169,110,0.1);
}

/* === LEAF DIVIDER === */
.leaf-divider {
  text-align: center; margin: 40px 0; color: var(--amber);
  font-size: 16px; opacity: 0.6;
}

/* === WECHAT SHOP BUTTON === */
.wx-shop-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px;
  background: #07C160; border: 1px solid #06AD56;
  color: #fff !important; font-family: var(--mono); font-size: 13px;
  cursor: pointer; text-decoration: none;
  border-radius: 4px; transition: all .15s;
  letter-spacing: 0.03em; font-weight: 600;
}
.wx-shop-btn:hover {
  background: #06AD56; text-decoration: none;
  box-shadow: 0 2px 16px rgba(7,193,96,0.25);
  color: #fff !important;
}
.wx-shop-btn .wx-icon { font-size: 15px; }

/* === FOOTER === */
.footer-bar {
  border-top: 1px solid var(--border);
  padding: 24px 16px; text-align: center;
  font-size: 11px; color: var(--fg-dim);
  line-height: 1.8;
}
.footer-bar .prompt { color: var(--amber); }
.footer-bar a { color: var(--fg-dim); }
.footer-bar a:hover { color: var(--amber); }

/* === 404 === */
.not-found {
  text-align: center; padding: 60px 0;
}
.not-found .nf-code {
  font-size: 6rem; font-weight: 700; color: var(--amber);
  font-family: var(--mono); opacity: 0.3; margin-bottom: 16px;
  letter-spacing: -0.05em;
}
.not-found .nf-msg {
  font-family: var(--serif); font-size: 1.3rem;
  color: var(--amber); margin-bottom: 8px;
}
.not-found .nf-hint {
  color: var(--fg-dim); font-size: 13px; margin-bottom: 32px;
}

/* === LEAF INFINITY HERO === */
.leaf-hero {
  text-align: center; padding: 60px 0 40px;
  animation: fadeIn 0.8s ease-out;
}
.leaf-hero .lh-icon {
  font-size: 3rem; margin-bottom: 16px;
  animation: leafDrift 4s ease-in-out infinite;
  display: inline-block;
}
.leaf-hero h1 {
  font-family: var(--serif);
  font-size: 2.4rem; font-weight: 700;
  color: var(--amber); margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.leaf-hero .lh-sub {
  font-size: 1.1rem; color: var(--fg-dim);
  margin-bottom: 8px;
  font-family: var(--serif);
}
.leaf-hero .lh-tagline {
  font-size: 1rem; color: var(--amber);
  font-family: var(--serif); font-style: italic;
  margin-bottom: 32px;
  opacity: 0.8;
}

/* === RESPONSIVE === */
@media (max-width: 700px) {
  html { font-size: 13px; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  }
  .main { padding: 20px 12px 32px; }
  .grid-2, .grid-3, .grid-4, .pillar-grid { grid-template-columns: 1fr; }
  .toolbar-inner { padding: 6px 10px; }
  .toolbar-nav { flex-wrap: wrap; }
  .toolbar-nav .sep { display: none; }
  .leaf-hero h1 { font-size: 1.8rem; }
  .leaf-hero { padding: 40px 0 24px; }
  .email-form .ef-row { flex-direction: column; }
  .ladder-step { flex-wrap: wrap; gap: 8px; }
  .ladder-step .ls-level { min-width: auto; }
  .ladder-step .ls-price { min-width: auto; }
  /* table overflow fix */
  .term-table {
    display: block; overflow-x: auto; -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
  .term-table td, .term-table th { min-width: 80px; }
  /* pre/code blocks readable on small screens */
  pre {
    font-size: 0.78em; padding: 12px;
    max-width: 100vw; overflow-x: auto; -webkit-overflow-scrolling: touch;
    word-break: break-all;
  }
  pre code { white-space: pre-wrap; word-break: break-all; }
  /* a11y: minimum touch targets */
  .cta, .cta.green, .cta.primary, .cta.large,
  .email-form button, .toolbar-nav a, .ladder-step {
    min-height: 44px; display: inline-flex; align-items: center;
  }
  .toolbar-nav a { min-height: 36px; }
  /* allow horizontal scroll for long cmd lines */
  .prompt-line { overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; }
}
@media (max-width: 400px) {
  .toolbar-nav a { padding: 4px 6px; font-size: 10px; }
  .leaf-hero h1 { font-size: 1.5rem; }
  .term-box-body { padding: 12px 8px; }
  .not-found .nf-code { font-size: 3.5rem; }
}