/* =============================================
   岐黄账簿 · 产品官网（www.l22.org）
   暖白 × 金色 × 墨绿 × 朱砂 · 与系统同源
   ============================================= */

/* ════════ 配色体系 ════════ */
:root {
  --paper: #f5f0e8;
  --paper-light: #faf6f0;
  --paper-dark: #e8e2d6;

  --ink-dark: #1c1c1a;
  --ink: #2c2c2a;
  --ink-light: #6b6a66;
  --ink-muted: #9e9a94;

  --teal: #2f4a3f;
  --teal-light: #4a6b5c;
  --teal-dark: #1f332b;
  --teal-glow: rgba(47, 74, 63, 0.08);

  --cinnabar: #c04040;
  --cinnabar-light: rgba(192, 64, 64, 0.08);

  --gold: #c9a96e;
  --gold-light: #e8dcc8;
  --gold-dark: #a88b4e;

  --border: #ddd6c8;
  --border-light: #e8e2d6;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", "Songti SC", serif;

  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

  --radius: 4px;
  --radius-lg: 10px;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-lift: 0 14px 34px rgba(28, 28, 26, 0.10);
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ════════ 重置 & 基础 ════════ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink-dark);
}
h1 { font-size: clamp(2.1rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
h3 { font-size: 1.45rem; }

a {
  color: var(--cinnabar);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--gold-dark); }

::selection {
  background: var(--teal-glow);
  color: var(--ink-dark);
}

/* ════════ 容器 ════════ */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ════════ 导航栏 ════════ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--teal);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--transition);
}
.site-header.scrolled { background: var(--teal-dark); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #f5f0e8;
}
.brand:hover { color: var(--gold-light); }

.seal {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--cinnabar);
  color: #fff;
  font-size: 19px;
  border-radius: 6px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.brand-text {
  font-size: 1.12rem;
  letter-spacing: 0.04em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.main-nav a {
  color: rgba(245, 240, 232, 0.85);
  font-size: 0.98rem;
}
.main-nav a:hover { color: var(--gold-light); }

.nav-cta {
  border: 1px solid var(--gold);
  color: var(--gold-light) !important;
  border-radius: 999px;
  padding: 6px 20px;
}
.nav-cta:hover { background: var(--gold); color: #fff !important; }

/* ════════ Hero ════════ */
.hero {
  padding: 150px 0 70px;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 90% at 50% -10%, rgba(201, 169, 110, 0.16), transparent 60%),
    var(--paper);
}

.hero-eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  color: var(--gold-dark);
  margin-bottom: var(--space-md);
}

.hero h1 { letter-spacing: 0.06em; }

.hero-line {
  width: 72px;
  height: 2px;
  margin: var(--space-lg) auto;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.hero-sub {
  color: var(--ink-light);
  font-size: 1.02rem;
}
.hero-sub b { color: var(--cinnabar); font-weight: 600; }

.hero-actions {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--cinnabar);
  color: #fff;
  border-radius: 999px;
  padding: 13px 40px;
  font-size: 1.02rem;
  transition: background var(--transition);
}
.btn-primary:hover { background: #a93226; color: #fff; }

.btn-ghost {
  display: inline-block;
  border: 1px solid var(--teal-light);
  color: var(--teal);
  border-radius: 999px;
  padding: 13px 36px;
  font-size: 1.02rem;
  transition: all var(--transition);
}
.btn-ghost:hover { background: var(--teal); color: #fff; }

.hero-note {
  margin-top: 26px;
  font-size: 0.88rem;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
}

/* ════════ 区块头 ════════ */
.home-section { padding: var(--space-xl) 0; }

.section-header { margin-bottom: var(--space-lg); }

.sec-label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.45em;
  color: var(--gold-dark);
  border: 1px solid var(--gold);
  border-radius: 999px;
  padding: 0.1em 0.9em 0.1em 1.35em;
  margin-bottom: 0.75rem;
}

/* ════════ 功能清单 ════════ */
.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 18px;
}
.feature-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--paper-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-list li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}
.feature-list i {
  flex: none;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 22px;
  font-style: normal;
}
.feature-list b { display: block; color: var(--ink-dark); font-size: 1.02rem; margin-bottom: 4px; }
.feature-list span { display: block; color: var(--ink-light); font-size: 0.92rem; line-height: 1.85; }

/* ════════ 价格 ════════ */
.pricing-band {
  background: var(--paper-dark);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px;
  max-width: 900px;
  margin: 0 auto;
}

.price-card {
  position: relative;
  background: var(--paper-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 26px 28px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.price-card:hover {
  transform: translateY(-5px);
  border-color: var(--gold);
  box-shadow: var(--shadow-lift);
}

.price-card.hot {
  border: 2px solid var(--cinnabar);
  background: #fff;
}

.hot-tag {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cinnabar);
  color: #fff;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  padding: 3px 16px;
  border-radius: 999px;
  white-space: nowrap;
}

.price-card .tier {
  font-size: 0.92rem;
  letter-spacing: 0.3em;
  color: var(--gold-dark);
  margin-bottom: 8px;
}

.price-card .price b {
  font-size: 2.7rem;
  font-weight: 600;
  color: var(--ink-dark);
}

.price-card .save {
  font-size: 0.85rem;
  color: var(--cinnabar);
  margin-top: 6px;
}

.price-card .per {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 6px;
  min-height: 1.4em;
}

.price-note {
  text-align: center;
  margin-top: 26px;
  font-size: 0.88rem;
  color: var(--ink-light);
}

/* ════════ FAQ ════════ */
.faq-list {
  max-width: 760px;
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--paper-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
}
.faq-item summary {
  cursor: pointer;
  padding: 15px 20px;
  font-weight: 600;
  color: var(--ink-dark);
  font-size: 0.98rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--gold-dark);
  transition: transform var(--transition);
  flex: none;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding: 0 20px 16px;
  color: var(--ink-light);
  font-size: 0.93rem;
  line-height: 2;
}

/* ════════ 使用者评价 ════════ */
.voice-viewport {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.voice-track {
  display: flex;
  gap: 22px;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.voice-card {
  flex: 0 0 calc((100% - 66px) / 4);
  margin: 0;
  background: var(--paper-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 26px 22px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-sizing: border-box;
}

.voice-card blockquote {
  position: relative;
  font-size: 1.02rem;
  line-height: 2;
  color: var(--ink-dark);
  flex: 1;
}
.voice-card blockquote::before {
  content: '「';
  color: var(--gold);
  margin-right: 2px;
}
.voice-card blockquote::after {
  content: '」';
  color: var(--gold);
  margin-left: 2px;
}

.voice-card figcaption {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}

.voice-avatar {
  flex: none;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--cinnabar);
  color: #fff;
  font-size: 18px;
  border-radius: 50%;
}

.voice-who { display: flex; flex-direction: column; line-height: 1.5; }
.voice-who b { color: var(--ink-dark); font-size: 0.95rem; }
.voice-who i {
  font-style: normal;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

/* 轮播圆点 */
.voice-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
}
.voice-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), transform var(--transition);
}
.voice-dot.active {
  background: var(--cinnabar);
  transform: scale(1.25);
}

@media (max-width: 960px) {
  .voice-card { flex: 0 0 calc((100% - 22px) / 2); }
}

@media (max-width: 640px) {
  .voice-card { flex: 0 0 100%; }
}

/* ════════ 开通 ════════ */
.contact-band {
  background: var(--teal-dark);
  color: rgba(245, 240, 232, 0.85);
}
.contact-band .sec-label { color: var(--gold-light); border-color: var(--gold); }
.contact-band h2 { color: var(--paper); }

.contact-cols {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 44px;
  align-items: center;
  max-width: 860px;
}

.qr-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 20px 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-lift);
}
.qr-card img {
  display: block;
  width: 180px;
  height: 180px;
  border-radius: 8px;
}
.qr-cap {
  margin-top: 12px;
  font-size: 0.95rem;
  color: var(--ink-dark);
  font-weight: 600;
}
.qr-sub {
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.contact-lede {
  color: var(--gold-light);
  font-size: 1.02rem;
  margin-bottom: 12px;
}

.contact-steps {
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 12px;
}
.contact-steps li {
  counter-increment: step;
  display: flex;
  gap: 14px;
  align-items: baseline;
  font-size: 0.98rem;
}
.contact-steps li::before {
  content: counter(step, cjk-ideographic);
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  color: var(--gold-light);
  border-radius: 50%;
  font-size: 0.85rem;
}

.contact-mail {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed rgba(245, 240, 232, 0.2);
  font-size: 0.92rem;
}
.contact-mail a { color: var(--gold-light); }
.contact-mail a:hover { color: #fff; }

/* ════════ 页脚 ════════ */
.site-footer {
  padding: var(--space-lg) 0;
  background: #17251e;
  color: rgba(245, 240, 232, 0.66);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-nav a { color: rgba(245, 240, 232, 0.85); }
.footer-nav a:hover { color: var(--gold-light); }
.footer-nav .dot { margin: 0 10px; opacity: 0.5; }

/* ════════ 响应式 ════════ */
@media (max-width: 720px) {
  body { font-size: 16px; }
  .hero { padding: 130px 0 54px; }
  .header-inner { flex-direction: column; padding-top: 10px; gap: 4px; }
  .main-nav { gap: var(--space-md); padding-bottom: 10px; flex-wrap: wrap; justify-content: center; }
  .contact-cols { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .contact-steps { text-align: left; }
  .footer-inner { justify-content: center; text-align: center; }
}