/* ===========================
   问见你官网 — style.css
   dark-amber design system
   =========================== */

:root {
  --bg:          #0F0D0A;
  --bg-card:     #1A1612;
  --bg-elevated: #221C16;
  --text:        #F0E8D8;
  --text-2:      #8A7A65;
  --text-3:      #5E5144;
  --amber:       #C8922A;
  --ember:       #D4845A;
  --amber-soft:  rgba(200,146,42,0.12);
  --border:      rgba(240,232,216,0.08);
  --border-2:    rgba(240,232,216,0.16);
  --serif:       "Noto Serif SC", "Songti SC", serif;
  --sans:        "Noto Sans SC", "PingFang SC", sans-serif;
  --radius:      16px;
  --max:         1100px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  background: rgba(15,13,10,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-2);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text); }

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 120px 80px 80px;
  overflow: hidden;
}

.hero-grain {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.6;
}

.hero-glow {
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(200,146,42,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  animation: fadeUp 0.8s ease both;
}

.hero-eyebrow {
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.15em;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 300;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--text);
}

.hero-title em {
  font-style: normal;
  color: var(--amber);
}

.hero-sub {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 48px;
}

.hero-qr-wrap {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero-qr-hint {
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.03em;
}

.hero-qr-placeholder,
.cta-qr-placeholder {
  width: 140px;
  height: 140px;
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-card);
  color: var(--text-2);
  font-size: 14px;
}

.hero-qr-placeholder small,
.cta-qr-placeholder small {
  font-size: 11px;
  color: var(--text-3);
}

/* ── Demo Card ── */
.hero-card-demo {
  position: relative;
  z-index: 1;
  animation: fadeUp 0.8s 0.2s ease both;
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 60px rgba(200,146,42,0.06);
}

.demo-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.demo-tag {
  font-size: 12px;
  color: var(--amber);
  background: var(--amber-soft);
  padding: 4px 12px;
  border-radius: 999px;
}

.demo-num {
  font-size: 13px;
  color: var(--text-3);
}

.demo-question {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: 28px;
  color: var(--text);
}

.demo-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.demo-option {
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  color: var(--text-2);
  background: var(--bg);
  transition: all 0.2s;
}

.demo-option.selected {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-soft);
}

/* ── Features ── */
.features {
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 300;
  text-align: center;
  margin-bottom: 16px;
}

.section-sub {
  text-align: center;
  color: var(--text-2);
  font-size: 17px;
  margin-bottom: 72px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.feature-item {
  background: var(--bg);
  padding: 48px 36px;
  transition: background 0.3s;
}

.feature-item:hover {
  background: var(--bg-card);
}

.feature-icon {
  font-size: 28px;
  color: var(--amber);
  margin-bottom: 20px;
  display: block;
}

.feature-item h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 12px;
}

.feature-item p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
}

/* ── How it works ── */
.how {
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 0;
}

.step {
  flex: 1;
  padding: 48px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.step-divider {
  font-size: 24px;
  color: var(--amber);
  padding: 0 16px;
  flex-shrink: 0;
}

.step-num {
  font-family: var(--serif);
  font-size: 48px;
  font-weight: 300;
  color: var(--amber);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 20px;
}

.step h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 10px;
}

.step p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
}

/* ── CTA ── */
.cta {
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.cta-inner {
  position: relative;
  text-align: center;
  padding: 80px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  border-radius: 32px;
  overflow: hidden;
}

.cta-grain {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
}

.cta-eyebrow {
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.15em;
  margin-bottom: 20px;
}

.cta-title {
  font-family: var(--serif);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 300;
  line-height: 1.3;
  margin-bottom: 20px;
}

.cta-sub {
  font-size: 17px;
  color: var(--text-2);
  margin-bottom: 40px;
}

.cta-qr-placeholder {
  margin: 0 auto;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.footer-logo {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--amber);
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-3);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--text-2); }

.footer-copy {
  font-size: 13px;
  color: var(--text-3);
}

.footer-icp {
  font-size: 12px;
  margin-top: 6px;
}

.footer-icp a {
  color: var(--text-3);
  text-decoration: none;
}

.footer-icp a:hover {
  color: var(--amber);
}

/* ── Inner pages ── */
.page-hero {
  padding: 160px 0 80px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-family: var(--serif);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 300;
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--text-2);
  font-size: 16px;
}

.page-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 24px 120px;
}

.page-body h2 {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 400;
  margin: 48px 0 16px;
  color: var(--amber);
}

.page-body h2:first-child { margin-top: 0; }

.page-body p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.9;
  margin-bottom: 16px;
}

.page-body ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.page-body li {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.9;
  margin-bottom: 8px;
}

.page-updated {
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 48px;
}

/* ── Questions page ── */
.section-intro {
  font-size: 14px;
  color: var(--text-3);
  margin-bottom: 24px;
  margin-top: -8px;
}

.question-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 48px;
}

.question-item {
  border-left: 2px solid var(--border);
  padding-left: 20px;
}

.q-text {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--text-1);
  margin-bottom: 6px;
}

.q-why {
  font-size: 13px;
  color: var(--text-3);
  margin: 0;
}

/* ── Stories page ── */
.story-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-bottom: 48px;
}

.story-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.story-q-label,
.story-answer-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  display: block;
  margin-bottom: 6px;
}

.story-q-text {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--text-1);
  margin-bottom: 20px;
}

.story-answers {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.story-answer {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}

.story-answer p {
  margin: 0;
  font-size: 15px;
  color: var(--text-2);
}

.story-ending {
  font-size: 14px;
  color: var(--text-3);
  font-style: italic;
  margin: 0;
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 100px 24px 60px;
    gap: 48px;
  }

  .hero-card-demo { display: none; }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    flex-direction: column;
    gap: 16px;
  }

  .step-divider { transform: rotate(90deg); }

  .nav { padding: 16px 24px; }
}