/* ==========================================================================
   斌先生工作室 · Studio — Design System
   Claude 米色暖橘 × 文青職人
   ========================================================================== */

:root {
  /* Colors */
  --bg: #F7F3ED;
  --surface: #FDFBF7;
  --text-primary: #2C1F17;
  --text-secondary: #6D5B4E;
  --text-muted: #9B8A7C;
  --accent: #C25E3F;
  --accent-hover: #A94A2E;
  --accent-soft: #F5D9CE;
  --border: #E5DDD1;
  --border-strong: #C9BEAE;
  --success: #6B8B4D;

  /* GUESTARS 品牌沿用色 (子頁點綴用) */
  --gs-navy: #1C1725;
  --gs-coral: #C4819A;
  --gs-gold: #C9A87C;
  --gs-cream: #F5F0EB;

  /* Shadows */
  --shadow-soft: 0 2px 12px rgba(44, 31, 23, 0.06);
  --shadow-med: 0 4px 24px rgba(44, 31, 23, 0.08);
  --shadow-strong: 0 8px 32px rgba(44, 31, 23, 0.12);

  /* Typography */
  --font-serif: "Noto Serif TC", "Playfair Display", "EB Garamond", Georgia, serif;
  --font-sans: "Noto Sans TC", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --section-py: 96px;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, video { max-width: 100%; height: auto; display: block; }

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

/* Typography */
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.05rem; }

p, li { color: var(--text-primary); }
p + p { margin-top: 12px; }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-top: 24px;
  line-height: 1.75;
}
.tagline {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-secondary);
}
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.text-center .lead { margin-left: auto; margin-right: auto; }

/* Site header */
.site-header {
  background: rgba(247, 243, 237, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  max-width: var(--container-max);
  margin: 0 auto;
}
.brand {
  text-decoration: none;
  color: var(--text-primary);
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}
.brand-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.brand-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active { color: var(--accent); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -6px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* Sections */
section { padding: var(--section-py) 0; }
section.tight { padding: 64px 0; }

/* Hero */
.hero { padding: calc(var(--section-py) + 24px) 0 var(--section-py); }
.hero h1 { max-width: 900px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: var(--font-sans);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: var(--surface);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.cta-group {
  display: flex;
  gap: 16px;
  margin-top: 40px;
  flex-wrap: wrap;
}

/* Cards / Product grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.product-card {
  background: var(--surface);
  padding: 40px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-med);
}
.tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 14px;
  font-weight: 500;
}
.product-card h3 { margin-bottom: 8px; }
.product-card .tagline { margin-bottom: 16px; font-size: 0.95rem; }
.product-card p.desc {
  color: var(--text-secondary);
  flex-grow: 1;
  margin-bottom: 24px;
  font-size: 0.95rem;
}
.price {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.card-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}
.card-link:hover { gap: 8px; }
.product-placeholder {
  background: transparent;
  border: 1px dashed var(--border-strong);
}
.product-placeholder h3 { color: var(--text-secondary); }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: center;
}
.about-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-med);
  aspect-ratio: 4/5;
  object-fit: cover;
  background: var(--border);
}
.about-text p + p { margin-top: 16px; color: var(--text-secondary); line-height: 1.8; }
.about-text > p:first-of-type { color: var(--text-primary); }

/* Who We Serve */
.who-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.who-item {
  padding: 24px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.who-item h4 { margin-bottom: 8px; font-size: 1.05rem; }
.who-item p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* Contact form */
.contact-form {
  max-width: 640px;
  margin-top: 40px;
}
.form-row { margin-bottom: 24px; }
.form-row label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-row textarea { resize: vertical; min-height: 120px; }

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 72px 0 32px;
  margin-top: 96px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand-name { font-size: 1.15rem; }
.footer-brand .tagline { margin-top: 6px; font-size: 0.9rem; }
.footer-heading {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 18px;
}
.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  margin-bottom: 10px;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.site-footer a:hover { color: var(--accent); }
.contact-info {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 16px;
  line-height: 1.8;
  font-style: normal;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --------------------------------------------------------
   Product page specifics — 定價表、方案、FAQ
   -------------------------------------------------------- */
.section-header { text-align: center; margin-bottom: 40px; }
.section-header p.lead { margin: 16px auto 0; }

.pricing-plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.pricing-plan {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px 32px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}
.pricing-plan:hover { box-shadow: var(--shadow-soft); }
.pricing-plan.recommended {
  border-color: var(--accent);
  background: var(--surface);
  position: relative;
  box-shadow: var(--shadow-med);
}
.pricing-plan.recommended::before {
  content: "推薦";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--surface);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  font-weight: 500;
}
.plan-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.plan-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}
.plan-price {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  color: var(--text-primary);
  margin: 0 0 4px;
  line-height: 1.1;
}
.plan-price small {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-weight: normal;
}
.plan-unit { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 20px; }
.plan-features {
  list-style: none;
  padding: 0;
  margin: 20px 0 24px;
  flex-grow: 1;
}
.plan-features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 22px;
  position: relative;
  line-height: 1.5;
}
.plan-features li:last-child { border-bottom: none; }
.plan-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

/* FAQ */
.faq-list { margin-top: 40px; }
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}
.faq-item h4 { margin-bottom: 10px; color: var(--text-primary); font-size: 1.1rem; }
.faq-item p { color: var(--text-secondary); line-height: 1.7; }

/* Feature list (drinkcam) */
.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}
.feature {
  padding: 8px 0;
}
.feature h4 { margin-bottom: 10px; }
.feature p { color: var(--text-secondary); font-size: 0.95rem; }

/* How it works step blocks */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.step {
  text-align: center;
  padding: 24px 16px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.step-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}
.step h4 { font-size: 1rem; margin-bottom: 6px; }
.step p { font-size: 0.85rem; color: var(--text-secondary); }

/* Note / callout */
.callout {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 32px 0;
  color: var(--text-primary);
  font-size: 0.95rem;
}
.callout strong { color: var(--accent-hover); }

/* Legal pages */
.legal-content { padding: 64px 0 96px; }
.legal-content h1 { margin-bottom: 8px; }
.legal-content .updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 40px;
}
.legal-content h2 { margin: 40px 0 12px; font-size: 1.35rem; }
.legal-content p { margin-bottom: 12px; color: var(--text-secondary); line-height: 1.85; }
.legal-content ol, .legal-content ul {
  margin: 12px 0 20px 24px;
  color: var(--text-secondary);
}
.legal-content li { margin-bottom: 6px; line-height: 1.75; }

/* Responsive */
/* Hamburger menu button (hidden on desktop) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 110;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  :root { --section-py: 72px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .product-grid { grid-template-columns: 1fr; }
  .who-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-plans { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .site-header nav { padding: 14px 20px; }

  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-med);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    font-size: 1rem;
  }
  .nav-links a.active::after { display: none; }
}
@media (max-width: 600px) {
  :root { --section-py: 56px; }
  .who-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .cta-group .btn { width: 100%; }
}