/* ============================================================
   Chinese Signal Bot — Swiss/Japanese Minimalist
   Clean, high-contrast, mono data, zen spacing
   ============================================================ */

/* ----- Fonts ----- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&family=Noto+Serif+JP:wght@400;600;700&display=swap');

/* ----- Design Tokens ----- */
:root {
  --bg:            #fafaf8;
  --surface:       #ffffff;
  --border:        #e5e3de;
  --text:          #1a1a18;
  --text-secondary:#5c5b55;
  --muted:         #94928b;
  --accent:        #c41e1e;
  --accent-soft:   #fef2f2;
  --gold:          #b8860b;
  --gold-soft:     #fefce8;
  --green:         #15803d;
  --green-soft:    #f0fdf4;
  --red:           #dc2626;
  --red-soft:      #fef2f2;
  --amber:         #d97706;
  --amber-soft:    #fffbeb;

  --font-sans:     'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'SF Mono', monospace;
  --font-display:  'Noto Serif JP', 'Georgia', serif;

  --gap-xs:        0.5rem;
  --gap-sm:        0.75rem;
  --gap-md:        1rem;
  --gap-lg:        1.5rem;
  --gap-xl:        2rem;
  --gap-2xl:       3rem;
  --gap-3xl:       4rem;

  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     16px;

  --shadow-sm:     0 1px 3px rgb(0 0 0 / 0.04);
  --shadow-md:     0 4px 16px rgb(0 0 0 / 0.06);
  --shadow-lg:     0 8px 32px rgb(0 0 0 / 0.08);

  --max-w:         1120px;
  --max-w-content: 760px;
}

/* ----- Reset ----- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  min-height:100vh;
  font-size:16px;
}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:#991b1b}

/* ----- Skip Link ----- */
.skip-link{position:absolute;top:-100px;left:1rem;z-index:999;background:var(--text);color:#fff;padding:.5rem 1rem;font-weight:600;font-size:.85rem;border-radius:var(--radius-sm)}
.skip-link:focus{top:.5rem}

/* ----- Utility Classes ----- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 var(--gap-lg)}
.content-narrow{max-width:var(--max-w-content);margin:0 auto;padding:0 var(--gap-lg)}

/* ----- Buttons ----- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  padding:.75rem 1.75rem;
  background:var(--text);
  color:#fff;
  font-weight:600;font-size:.85rem;
  border:none;border-radius:var(--radius-sm);
  cursor:pointer;text-decoration:none;
  font-family:var(--font-sans);
  transition:all .2s;
  letter-spacing:-.01em;
}
.btn:hover{background:#33322e;color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn:active{transform:translateY(0)}
.btn--outline{background:transparent;color:var(--text);border:1.5px solid var(--border)}
.btn--outline:hover{background:var(--bg);color:var(--text);border-color:var(--text)}
.btn--accent{background:var(--accent)}
.btn--accent:hover{background:#991b1b}

/* ----- Badges ----- */
.badge{
  display:inline-flex;align-items:center;gap:.25rem;
  font-size:.65rem;font-weight:600;
  padding:.2rem .6rem;
  border-radius:100px;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.badge--green{background:var(--green-soft);color:var(--green)}
.badge--amber{background:var(--amber-soft);color:var(--amber)}
.badge--red{background:var(--red-soft);color:var(--red)}
.badge--gold{background:var(--gold-soft);color:var(--gold)}

/* ----- Section Titles ----- */
.section-label{
  font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;
  color:var(--muted);margin-bottom:.5rem;
}
.section-heading{
  font-size:1.75rem;font-weight:800;letter-spacing:-.02em;
  line-height:1.2;margin-bottom:var(--gap-lg);
  color:var(--text);
}
.section-heading .accent{color:var(--accent)}
.section-heading .gold{color:var(--gold)}

/* ----- Rule / Divider ----- */
.rule{height:1px;background:var(--border);border:none;margin:var(--gap-2xl) 0}
.rule--thin{margin:var(--gap-xl) 0}

/* ============================================================
   NAVIGATION — Minimalist top bar
   ============================================================ */
.site-header{
  background:rgb(255 255 255 / .85);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  padding:0 var(--gap-lg);
}
.header-inner{
  max-width:var(--max-w);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  height:56px;gap:var(--gap-lg);
}
.logo{
  display:flex;align-items:center;gap:.5rem;
  font-family:var(--font-display);font-size:.95rem;font-weight:700;
  color:var(--text);text-decoration:none;letter-spacing:-.01em;
}
.logo:hover{text-decoration:none;color:var(--accent)}
.logo svg{width:28px;height:28px;flex-shrink:0}
.logo .zhong{font-size:1.1rem;color:var(--accent)}
.header-nav{display:flex;gap:2rem;align-items:center}
.header-nav a{
  font-size:.8rem;font-weight:500;color:var(--text-secondary);
  transition:color .15s;letter-spacing:-.01em;
}
.header-nav a:hover{color:var(--text);text-decoration:none}
.header-nav a.active{color:var(--accent);font-weight:600}

/* ============================================================
   PROMO BANNER — Sticky, mobile-first, high-contrast
   ============================================================ */
.promo-banner{
  position:sticky;top:0;z-index:200;
  background:linear-gradient(135deg, #0f1729 0%, #1a2744 100%);
  border-bottom:2px solid #f59e0b;
  padding:0;
}
.promo-banner-inner{
  max-width:var(--max-w);
  margin:0 auto;
  display:flex;align-items:center;justify-content:center;
  gap:.5rem 1rem;
  padding:.55rem 1rem;
  flex-wrap:wrap;
  min-height:44px;
}
.promo-banner-brand{
  font-family:var(--font-mono);
  font-size:.6rem;font-weight:800;
  color:#f59e0b;
  letter-spacing:.12em;
  background:rgb(245 158 11/.12);
  border:1px solid rgb(245 158 11/.25);
  padding:.2rem .5rem;
  border-radius:3px;
  white-space:nowrap;
  flex-shrink:0;
}
.promo-banner-text{
  display:flex;align-items:center;gap:.4rem;
  flex-wrap:wrap;justify-content:center;
}
.promo-banner-highlight{
  font-size:.72rem;font-weight:800;
  color:#fff;
  letter-spacing:.02em;
  white-space:nowrap;
}
.promo-banner-sep{
  color:rgb(255 255 255/.2);
  font-size:.7rem;
}
.promo-banner-sub{
  font-size:.65rem;font-weight:500;
  color:rgb(255 255 255/.55);
  white-space:nowrap;
}
.promo-banner-cta{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.5rem 1rem;
  background:#f59e0b;
  color:#000;
  font-size:.7rem;font-weight:800;
  letter-spacing:.04em;
  border-radius:6px;
  text-decoration:none;
  white-space:nowrap;
  flex-shrink:0;
  transition:all .15s;
  box-shadow:0 0 16px rgb(245 158 11/.25);
  animation:pulse-cta 2.5s ease-in-out infinite;
}
.promo-banner-cta:hover{
  background:#fbbf24;
  color:#000;
  text-decoration:none;
  transform:scale(1.04);
  box-shadow:0 0 24px rgb(245 158 11/.4);
}
@keyframes pulse-cta{
  0%,100%{box-shadow:0 0 16px rgb(245 158 11/.25)}
  50%{box-shadow:0 0 28px rgb(245 158 11/.45)}
}

/* Mobile: compact layout */
@media(max-width:580px){
  .promo-banner-inner{
    gap:.35rem .6rem;
    padding:.45rem .75rem;
  }
  .promo-banner-text{
    order:2;
    flex-basis:100%;
    justify-content:center;
  }
  .promo-banner-brand{
    font-size:.55rem;
    padding:.15rem .4rem;
  }
  .promo-banner-highlight{font-size:.7rem}
  .promo-banner-sub{font-size:.6rem}
  .promo-banner-cta{
    font-size:.65rem;
    padding:.4rem .8rem;
  }
}

/* ============================================================
   HERO — Bold typography, generous whitespace
   ============================================================ */
.hero{
  padding:var(--gap-3xl) var(--gap-lg) var(--gap-2xl);
  text-align:center;
  background:linear-gradient(180deg, #fefefe 0%, var(--bg) 100%);
}
.hero .overline{
  font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;
  color:var(--accent);margin-bottom:var(--gap-sm);
}
.hero h1{
  font-family:var(--font-display);
  font-size:clamp(2rem, 5vw, 3.5rem);
  font-weight:700;line-height:1.1;letter-spacing:-.02em;
  color:var(--text);margin-bottom:var(--gap-md);
  max-width:700px;margin-inline:auto;
}
.hero h1 .gold{color:var(--gold)}
.hero p{
  font-size:1.05rem;color:var(--text-secondary);
  max-width:520px;margin-inline:auto;line-height:1.6;
}
.hero .live-badge{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.35rem .8rem;
  background:var(--green-soft);
  border:1px solid rgb(21 128 61 / .15);
  border-radius:100px;
  font-size:.75rem;font-weight:600;color:var(--green);
}
.hero-actions{
  display:flex;align-items:center;justify-content:center;gap:.5rem;
  margin-top:var(--gap-lg);
  flex-wrap:wrap;
}
.hero-cta-vip{
  display:inline-flex;align-items:center;gap:.3rem;
  padding:.35rem 1rem;
  background:var(--gold);color:#000;
  font-size:.75rem;font-weight:700;
  border-radius:100px;text-decoration:none;
  white-space:nowrap;
  transition:all .2s;
  animation:cta-glow 2.5s infinite;
}
.hero-cta-vip:hover{
  background:#f59e0b;color:#000;
  text-decoration:none;transform:scale(1.05);
  animation:none;
}
@keyframes cta-glow{
  0%,100%{box-shadow:0 0 0 0 rgb(202 138 4 / 0.35)}
  50%{box-shadow:0 0 0 6px rgb(202 138 4 / 0)}
}
.hero .live-dot{
  width:7px;height:7px;background:var(--green);border-radius:50%;
  animation:live-pulse 2s infinite;
}
@keyframes live-pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgb(21 128 61 / .4)}50%{opacity:.7;box-shadow:0 0 0 6px rgb(21 128 61 / 0)}}

/* ============================================================
   TABS — Clean pill style
   ============================================================ */
.tabs{
  display:flex;gap:.35rem;
  padding:.35rem;
  background:var(--border);
  border-radius:100px;
  margin-bottom:var(--gap-lg);
}
.tab-btn{
  flex:1;padding:.65rem 1.5rem;
  font-size:.78rem;font-weight:600;
  background:transparent;color:var(--text-secondary);
  border:none;border-radius:100px;
  cursor:pointer;transition:all .2s;
  font-family:var(--font-sans);letter-spacing:-.01em;
}
.tab-btn.active{background:#fff;color:var(--text);box-shadow:var(--shadow-sm)}
.tab-btn:hover:not(.active){color:var(--text)}

.tab-panel{display:none}
.tab-panel.active{display:block}

/* Sub-tabs */
.tf-tabs{display:flex;gap:.25rem;margin-bottom:var(--gap-md)}
.tf-tab-btn{
  padding:.4rem .9rem;
  font-size:.7rem;font-weight:600;
  font-family:var(--font-mono);
  background:transparent;color:var(--muted);
  border:1.5px solid var(--border);border-radius:100px;
  cursor:pointer;transition:all .2s;
}
.tf-tab-btn.active{background:var(--text);color:#fff;border-color:var(--text)}
.tf-tab-btn:hover:not(.active){border-color:var(--text-secondary);color:var(--text-secondary)}
.tf-panel{display:none}
.tf-panel.active{display:block}

/* ============================================================
   SIGNAL CARDS — Clean card with mono data
   ============================================================ */
.signal-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:var(--gap-sm);
}
.signal-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:var(--gap-lg);
  transition:all .25s;
}
.signal-card:hover{
  border-color:#d1cec7;
  box-shadow:var(--shadow-md);
  transform:translateY(-2px);
}
.signal-card .pair-header{
  display:flex;justify-content:space-between;align-items:baseline;
  margin-bottom:var(--gap-sm);
  padding-bottom:var(--gap-sm);
  border-bottom:1px solid var(--border);
}
.signal-card .pair-symbol{
  font-family:var(--font-mono);font-size:.85rem;font-weight:600;
  color:var(--text);letter-spacing:-.02em;
}
.signal-card .pair-price{
  font-family:var(--font-mono);font-size:.78rem;font-weight:500;
  color:var(--text-secondary);font-variant-numeric:tabular-nums;
}
.signal-card .pair-change{
  font-family:var(--font-mono);font-size:.65rem;font-weight:600;
  margin-left:.25rem;font-variant-numeric:tabular-nums;
}
.change-up{color:var(--green)}
.change-down{color:var(--red)}

.signal-card .direction{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .65rem;
  border-radius:100px;
  font-family:var(--font-mono);font-size:.68rem;font-weight:700;
  margin-bottom:var(--gap-sm);letter-spacing:.02em;
}
.direction-call{background:var(--green-soft);color:var(--green);border:1px solid rgb(21 128 61 / .15)}
.direction-put{background:var(--red-soft);color:var(--red);border:1px solid rgb(220 38 38 / .15)}
.direction-wait{background:var(--amber-soft);color:var(--amber);border:1px solid rgb(217 119 6 / .15)}

.signal-card .conf-meta{
  display:flex;justify-content:space-between;align-items:center;
  font-size:.68rem;color:var(--muted);margin-bottom:.4rem;
  font-family:var(--font-mono);
}
.conf-bar{
  height:4px;background:var(--border);border-radius:2px;
  margin-bottom:.6rem;overflow:hidden;
}
.conf-bar-fill{height:100%;border-radius:2px;transition:width .4s ease-out}
.conf-high{background:var(--green)}
.conf-mid{background:var(--amber)}
.conf-low{background:var(--muted)}

.signal-card .reasons{
  font-size:.7rem;color:var(--text-secondary);line-height:1.55;
  padding-top:var(--gap-sm);border-top:1px solid var(--border);
}

/* ============================================================
   FEATURE CARDS
   ============================================================ */
.feature-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:var(--gap-md);
}
.feature-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:var(--gap-lg);
  transition:all .2s;
}
.feature-card:hover{box-shadow:var(--shadow-sm)}
.feature-card .num{
  font-family:var(--font-mono);font-size:.65rem;font-weight:700;
  color:var(--muted);margin-bottom:.5rem;letter-spacing:.06em;
}
.feature-card h3{font-size:.85rem;font-weight:700;margin-bottom:.35rem;color:var(--text)}
.feature-card p{font-size:.78rem;color:var(--text-secondary);line-height:1.6}

/* ============================================================
   STAT ROW
   ============================================================ */
.stats-row{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;border:1px solid var(--border);border-radius:var(--radius-md);
  overflow:hidden;background:var(--surface);
}
.stat-item{
  padding:var(--gap-lg);text-align:center;
  border-right:1px solid var(--border);
}
.stat-item:last-child{border-right:none}
.stat-value{
  font-family:var(--font-display);font-size:2rem;font-weight:700;
  color:var(--accent);line-height:1.1;
}
.stat-label{font-size:.7rem;color:var(--muted);margin-top:.25rem}

/* ============================================================
   COMPARISON TABLE — Clean, minimal
   ============================================================ */
.compare-table{
  width:100%;border-collapse:collapse;font-size:.8rem;
}
.compare-table th, .compare-table td{
  padding:.85rem var(--gap-md);text-align:left;
}
.compare-table thead th{
  font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;
  color:var(--muted);border-bottom:2px solid var(--text);
  padding-bottom:.6rem;
}
.compare-table tbody td{border-bottom:1px solid var(--border)}
.compare-table tbody tr:hover{background:var(--bg)}
.compare-table td:first-child{font-weight:600;color:var(--text)}
.check{color:var(--green);font-weight:700}
.cross{color:var(--muted)}
.star{color:var(--gold);font-weight:700}

/* ============================================================
   FORMS
   ============================================================ */
.form-group{margin-bottom:var(--gap-md)}
.form-label{
  display:block;font-size:.75rem;font-weight:600;
  color:var(--text);margin-bottom:.3rem;
}
.form-input,.form-select,.form-textarea{
  width:100%;padding:.7rem .85rem;
  background:var(--bg);border:1.5px solid var(--border);
  border-radius:var(--radius-sm);
  font-size:.82rem;font-family:var(--font-sans);
  color:var(--text);transition:border-color .2s;
}
.form-input:focus,.form-select:focus,.form-textarea:focus{
  outline:none;border-color:var(--text);
}
.form-textarea{resize:vertical;min-height:90px}
.form-input::placeholder,.form-textarea::placeholder{color:var(--muted)}

/* ============================================================
   LOCKED / PREMIUM SECTION
   ============================================================ */
.locked-section{
  text-align:center;padding:var(--gap-2xl) var(--gap-lg);
  background:var(--gold-soft);
  border:1px solid rgb(184 134 11 / .15);
  border-radius:var(--radius-md);
}
.locked-section .lock{font-size:2.5rem;margin-bottom:var(--gap-sm)}
.locked-section h3{font-size:1rem;font-weight:700;margin-bottom:.3rem}
.tf-chips{
  display:flex;flex-wrap:wrap;justify-content:center;gap:.4rem;
  max-width:440px;margin:var(--gap-lg) auto;
}
.tf-chip{
  padding:.3rem .55rem;
  background:#fff;border:1px solid var(--border);
  border-radius:100px;
  font-family:var(--font-mono);font-size:.62rem;font-weight:600;
  color:var(--muted);
}

/* ============================================================
   FAQ — Clean accordion
   ============================================================ */
.faq details{border-bottom:1px solid var(--border)}
.faq summary{
  padding:var(--gap-md) 0;font-size:.88rem;font-weight:600;
  cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;
  color:var(--text);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:'+';font-size:1.2rem;color:var(--muted);font-weight:400;
  transition:transform .2s;
}
.faq details[open] summary::after{content:'−';transform:rotate(180deg)}
.faq .answer{padding:0 0 var(--gap-md);font-size:.82rem;color:var(--text-secondary);line-height:1.65}

/* ============================================================
   CONTENT PAGES (about, terms, privacy, contact)
   ============================================================ */
.page-header{padding:var(--gap-2xl) 0 var(--gap-lg)}
.page-header h1{
  font-family:var(--font-display);font-size:2rem;font-weight:700;
  letter-spacing:-.02em;margin-bottom:.25rem;
}
.page-meta{font-size:.8rem;color:var(--muted)}
.page-section{margin-bottom:var(--gap-2xl)}
.page-section h2{
  font-size:.95rem;font-weight:700;margin-bottom:var(--gap-md);
  color:var(--text);letter-spacing:-.01em;
}
.page-section p,.page-section li{
  font-size:.85rem;color:var(--text-secondary);margin-bottom:.75rem;line-height:1.7;
}
.page-section ul{padding-left:1.25rem;margin-bottom:.75rem}
.page-section li{margin-bottom:.35rem}

/* ============================================================
   CARDS FOR CONTACT / INFO SECTIONS
   ============================================================ */
.info-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:var(--gap-lg);
}
.info-card h3{font-size:.85rem;font-weight:700;margin-bottom:.3rem}
.info-card p{font-size:.78rem;color:var(--text-secondary)}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  margin-top:var(--gap-3xl);
  border-top:1px solid var(--border);
  background:var(--surface);
  padding:var(--gap-2xl) var(--gap-lg);
}
.footer-inner{
  max-width:var(--max-w);margin:0 auto;
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;
  gap:var(--gap-xl);margin-bottom:var(--gap-lg);
}
.footer-brand strong{display:block;font-size:.8rem;font-weight:700;margin-bottom:.1rem}
.footer-brand small{font-size:.68rem;color:var(--muted)}
.footer-nav{display:flex;gap:var(--gap-lg)}
.footer-nav a{font-size:.75rem;color:var(--text-secondary)}
.footer-nav a:hover{color:var(--text)}
.disclaimer{
  max-width:var(--max-w);margin:0 auto;
  font-size:.6rem;color:var(--muted);line-height:1.6;
  padding-top:var(--gap-md);border-top:1px solid var(--border);
}

/* ============================================================
   TOAST
   ============================================================ */
.toast{
  position:fixed;bottom:1.5rem;right:1.5rem;
  padding:.7rem 1.25rem;
  background:var(--text);color:#fff;
  font-size:.78rem;font-weight:600;
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow-lg);
  opacity:0;transform:translateY(10px);
  transition:all .3s;pointer-events:none;z-index:999;
}
.toast--visible{opacity:1;transform:translateY(0)}
.toast--error{background:var(--red)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:768px){
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .stat-item:nth-child(2){border-right:none}
  .hero h1{font-size:1.6rem}
  .hero p{font-size:.9rem}
  .hero-cta-vip{font-size:.72rem;padding:.4rem .85rem}
  .signal-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .header-nav{gap:1rem}
  .section-heading{font-size:1.35rem}
  .page-header h1{font-size:1.5rem}
}
@media(max-width:480px){
  .stats-row{grid-template-columns:1fr}
  .stat-item{border-right:none;border-bottom:1px solid var(--border)}
  .stat-item:last-child{border-bottom:none}
  .tabs{flex-direction:column;border-radius:var(--radius-md)}
  .tab-btn{border-radius:var(--radius-sm)}
  .compare-table{font-size:.68rem}
  .compare-table th,.compare-table td{padding:.5rem .4rem}
}