/* roulang page: index */
:root {
    --tea-700: #6a4730;
    --tea-500: #9a7250;
    --cream: #faf7f3;
    --sage: #4a6b5d;
    --gold: #c8a46a;
    --ink: #2d241d;
    --text-strong: #2d241d;
    --text-body: #4a3a2e;
    --text-weak: #8a7a6a;
    --border-soft: #e8ddd0;
    --radius-lg: 16px;
    --shadow-card: 0 4px 24px -6px rgba(74,45,30,0.12);
  }

  html {
    scroll-behavior: smooth;
  }
  body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--cream);
    color: var(--text-body);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  h1, h2, h3, h4, .serif-display {
    font-family: 'Noto Serif SC', 'Songti SC', 'STSong', Georgia, serif;
  }
  .hero-overlay {
    background: linear-gradient(135deg, rgba(38,25,15,0.88) 0%, rgba(58,38,22,0.75) 55%, rgba(75,48,28,0.55) 100%);
  }
  .play-btn {
    width: 76px;
    height: 76px;
    border-radius: 9999px;
    background: rgba(255,255,255,0.18);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,0.4);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
  }
  .play-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.06);
    box-shadow: 0 0 0 12px rgba(255,255,255,0.06);
  }
  .play-btn::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 9999px;
    border: 1px solid rgba(255,255,255,0.15);
    animation: pulse-ring 2.4s infinite ease-out;
  }
  @keyframes pulse-ring {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.35); opacity: 0; }
  }
  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    letter-spacing: 0.12em;
    font-weight: 500;
    color: var(--tea-500);
    text-transform: uppercase;
  }
  .section-label::before {
    content: '';
    width: 28px;
    height: 1px;
    background: var(--gold);
    display: inline-block;
  }
  .card-hover {
    transition: all 0.35s ease;
    border: 1px solid var(--border-soft);
    background: #fff;
    box-shadow: var(--shadow-card);
  }
  .card-hover:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px -10px rgba(74,45,30,0.18);
    border-color: rgba(200,164,106,0.4);
  }
  .tag-pill {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 500;
    background: rgba(154,114,80,0.1);
    color: var(--tea-700);
    border: 1px solid rgba(154,114,80,0.2);
  }
  .step-number {
    font-family: 'Georgia', serif;
    font-size: 42px;
    font-weight: 700;
    color: rgba(200,164,106,0.2);
    line-height: 1;
  }
  .faq-item {
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    background: #fff;
    transition: all 0.3s ease;
  }
  .faq-item:hover {
    border-color: rgba(200,164,106,0.4);
    box-shadow: 0 4px 16px rgba(74,45,30,0.06);
  }
  .faq-item details summary {
    list-style: none;
    cursor: pointer;
  }
  .faq-item details summary::-webkit-details-marker {
    display: none;
  }
  .faq-item details[open] {
    border-color: rgba(154,114,80,0.3);
  }
  .faq-item details[open] .faq-icon {
    transform: rotate(45deg);
  }
  .faq-icon {
    transition: transform 0.3s ease;
    font-size: 22px;
    color: var(--tea-500);
    line-height: 1;
  }
  .nav-link {
    position: relative;
    padding: 6px 4px;
    font-weight: 400;
    color: var(--text-body);
    transition: color 0.3s ease;
  }
  .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width 0.3s ease;
    border-radius: 2px;
  }
  .nav-link:hover {
    color: var(--tea-700);
  }
  .nav-link:hover::after,
  .nav-link.active::after {
    width: 100%;
  }
  .nav-link.active {
    color: var(--tea-700);
    font-weight: 500;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--tea-700);
    color: #fff;
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    box-shadow: 0 4px 16px rgba(74,45,30,0.2);
  }
  .btn-primary:hover {
    background: var(--tea-800);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(74,45,30,0.28);
  }
  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(74,45,30,0.2);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: transparent;
    color: var(--tea-700);
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 500;
    border: 1.5px solid rgba(154,114,80,0.5);
    transition: all 0.3s ease;
  }
  .btn-outline:hover {
    border-color: var(--tea-700);
    background: rgba(154,114,80,0.08);
    transform: translateY(-2px);
  }
  .nav-blur {
    background: rgba(250,247,243,0.86);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(232,221,208,0.6);
  }
  .section-space {
    padding: 96px 0;
  }
  @media (max-width: 768px) {
    .section-space {
      padding: 64px 0;
    }
  }
  .footer-links a {
    color: rgba(255,255,255,0.7);
    transition: color 0.3s ease;
  }
  .footer-links a:hover {
    color: var(--gold);
  }
  input, textarea {
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }
  input:focus, textarea:focus {
    outline: none;
    border-color: var(--tea-500);
    box-shadow: 0 0 0 3px rgba(154,114,80,0.15);
  }
  .divider-text {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-weak);
    font-size: 13px;
  }
  .divider-text::before,
  .divider-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-soft);
  }
  .hero-title {
    font-size: clamp(32px, 5vw, 56px);
    line-height: 1.35;
    letter-spacing: 0.01em;
  }
  .faq-answer {
    font-size: 14.5px;
    color: var(--text-body);
    line-height: 1.85;
  }
  .stat-number {
    font-family: 'Georgia', serif;
    font-size: clamp(30px, 4vw, 46px);
    font-weight: 700;
    color: var(--tea-700);
    line-height: 1.2;
  }
  .process-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.3s ease;
  }
  .process-card:hover {
    box-shadow: 0 12px 32px -8px rgba(74,45,30,0.14);
    transform: translateY(-4px);
  }
  .process-card .step-connector {
    position: absolute;
    top: 60px;
    right: -24px;
    width: 48px;
    height: 1px;
    background: linear-gradient(90deg, var(--gold), transparent);
    display: none;
  }
  @media (min-width: 1024px) {
    .process-card .step-connector {
      display: block;
    }
  }

/* roulang page: category1 */
:root {
  --tea-50: #f7f6f0;
  --tea-100: #e9eadc;
  --tea-200: #d4d8bd;
  --tea-300: #b4bf95;
  --tea-400: #92a372;
  --tea-500: #72874f;
  --tea-600: #596b3e;
  --tea-700: #465534;
  --tea-800: #38442b;
  --tea-900: #2c3623;
  --tea-950: #1c2315;
  --gold: #c8a76e;
  --gold-light: #e3ca9a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: #fbfaf5;
  color: var(--tea-900);
  line-height: 1.6;
  font-size: 16px;
}
.serif-display {
  font-family: 'Songti SC', 'Noto Serif SC', 'SimSun', serif;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; }
.nav-blur {
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(44,54,35,0.06);
  transition: box-shadow .3s;
}
.nav-blur.scrolled {
  box-shadow: 0 4px 24px rgba(28,35,21,0.08);
}
.nav-link {
  position: relative;
  color: #4a5540;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.1rem;
  transition: color .25s;
  letter-spacing: 0.02em;
}
.nav-link:hover { color: var(--tea-600); }
.nav-link.active { color: var(--tea-800); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 2px;
  background: var(--gold);
  border-radius: 2px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gold);
  color: var(--tea-950);
  font-weight: 600;
  border-radius: 0.75rem;
  padding: 0.72rem 1.4rem;
  font-size: 0.92rem;
  transition: all .25s;
  box-shadow: 0 2px 10px rgba(200,167,110,0.28);
  border: none;
  cursor: pointer;
  line-height: 1.4;
}
.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,167,110,0.38);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(200,167,110,0.3); }
.btn-primary:focus-visible, .btn-outline:focus-visible, .nav-link:focus-visible, a:focus-visible {
  outline: 3px solid rgba(89,107,62,0.35);
  outline-offset: 2px;
  border-radius: 4px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  font-weight: 500;
  border-radius: 0.75rem;
  padding: 0.68rem 1.4rem;
  font-size: 0.92rem;
  transition: all .25s;
  background: transparent;
  cursor: pointer;
}
.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(200,167,110,0.08);
}
.card-shadow { box-shadow: 0 4px 20px rgba(44,54,35,0.06); }
.card-hover { transition: all .3s ease; }
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(44,54,35,0.1);
}
.footer-links a {
  color: rgba(255,255,255,0.6);
  transition: color .2s;
}
.footer-links a:hover { color: var(--gold); }
.faq-item summary { list-style: none; cursor: pointer; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item[open] summary .faq-icon {
  transform: rotate(45deg);
}
.faq-icon {
  transition: transform .3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--tea-300);
  flex-shrink: 0;
  color: var(--tea-600);
}
.plan-card { transition: all .35s ease; }
.plan-card.recommended {
  border: 2px solid var(--gold);
  box-shadow: 0 12px 40px rgba(200,167,110,0.28);
  transform: scale(1.02);
  position: relative;
  z-index: 2;
}
.plan-card.recommended:hover { transform: scale(1.02) translateY(-4px); }
.plan-card:not(.recommended):hover { transform: translateY(-6px); }
.hero-pattern {
  background-image: radial-gradient(rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 20px 20px;
}
@media (max-width: 768px) {
  .plan-card.recommended { transform: scale(1); }
  .plan-card.recommended:hover { transform: translateY(-4px); }
}
@media (max-width: 640px) {
  body { font-size: 15px; }
}
.section-line {
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(44,54,35,0.08), transparent);
}