/* ==========================================================================
   Main Styles — 不二創立 ONE-WAY × AICycle 提案書
   ========================================================================== */

/* ------------------------------------------------------------------
   Design Tokens
   ------------------------------------------------------------------ */
:root {
  /* 品牌色 */
  --green-deep: #4a7c59;
  --green-mid: #6b9b7a;
  --green-light: #a8d5ba;
  --green-bg: #e8f5e9;
  --white: #ffffff;
  --warm-gray: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-500: #adb5bd;
  --gray-700: #495057;
  --text-primary: #2c3e50;
  --text-secondary: #6c757d;

  /* 產品色 */
  --product-energy: #4a7c59;
  --product-apple: #c62828;
  --product-turmeric: #a67c37;
  --product-berry: #b71c4c;

  /* 功能色 */
  --alert-red: #e74c3c;
  --growth-gold: #f39c12;
  --cta-coral: #e8956a;

  /* 字體 */
  --font-stack: "Inter", "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* 間距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* 圓角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* 陰影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

/* ------------------------------------------------------------------
   Reset & Base
   ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--green-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ------------------------------------------------------------------
   Layout
   ------------------------------------------------------------------ */
.container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}
@media (min-width: 1024px) {
  .container { padding: 0 var(--space-4xl); }
}
section {
  padding: var(--space-4xl) 0;
}
section:nth-child(even) {
  background: var(--warm-gray);
}

/* ------------------------------------------------------------------
   Typography
   ------------------------------------------------------------------ */
h1 { font-size: 2.5rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: 2rem; font-weight: 800; line-height: 1.25; margin-bottom: var(--space-md); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; font-weight: 700; line-height: 1.35; margin-bottom: var(--space-sm); }
h4 { font-size: 1.1rem; font-weight: 700; line-height: 1.4; margin-bottom: var(--space-sm); }
.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 100%;
}
.section-body { max-width: 100%; }
.section-body p { margin-bottom: var(--space-md); }

.text-green { color: var(--green-deep); }
.text-red { color: var(--alert-red); }
.text-gold { color: var(--growth-gold); }
.text-center { text-align: center; }

.highlight-box {
  background: var(--green-bg);
  border-left: 4px solid var(--green-deep);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-lg) 0;
  font-weight: 600;
}

.alert-box {
  background: #fef2f2;
  border-left: 4px solid var(--alert-red);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-lg) 0;
  font-weight: 600;
  color: #991b1b;
}

/* ------------------------------------------------------------------
   Header
   ------------------------------------------------------------------ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s, box-shadow 0.3s;
}
.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}
.site-header.is-hidden {
  transform: translateY(-100%);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 var(--space-lg);
  max-width: 100%;
  margin: 0 auto;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 15px;
  color: var(--green-deep);
}
.header-brand span { color: var(--text-secondary); font-weight: 400; font-size: 13px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav-link:hover, .nav-link.is-active {
  color: var(--green-deep);
  text-decoration: none;
  border-bottom-color: var(--green-deep);
}
.nav-cta {
  background: var(--cta-coral);
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  border: none;
  transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover {
  background: #d9845c;
  text-decoration: none;
  transform: translateY(-1px);
}

/* 漢堡選單 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.is-active span:nth-child(2) { opacity: 0; }
.hamburger.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
  }
  .nav-links.is-open { transform: translateY(0); }
  .nav-link { font-size: 16px; }
}

/* ------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------ */
#hero {
  padding-top: calc(64px + var(--space-4xl));
  padding-bottom: var(--space-4xl);
  background: var(--white);
  min-height: 90vh;
  display: flex;
  align-items: center;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-3xl);
  align-items: center;
}
.hero-headline {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}
.hero-headline em {
  font-style: normal;
  color: var(--green-deep);
}
.hero-sub {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}
.hero-body {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}
.hero-cta {
  display: inline-block;
  background: var(--cta-coral);
  color: var(--white);
  padding: 16px 40px;
  border-radius: 12px;
  font-size: 1.125rem;
  font-weight: 700;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(232, 149, 106, 0.4);
}
.hero-cta:hover {
  background: #d9845c;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 149, 106, 0.5);
  text-decoration: none;
}

/* Hero 右側視覺 */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}
.hero-products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}
.hero-product-item {
  background: var(--warm-gray);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  border: 1px solid var(--gray-200);
  transition: transform 0.2s;
}
.hero-product-item:hover { transform: translateY(-2px); }
.hero-product-item__name { font-size: 14px; font-weight: 700; color: var(--text-primary); margin-bottom: 2px; }
.hero-product-item__price { font-size: 13px; color: var(--text-secondary); }
.hero-product-item__dot { width: 32px; height: 32px; border-radius: 50%; margin: 0 auto var(--space-sm); }

.trust-badges {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}
.trust-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--white);
  border: 1px solid var(--gray-200);
  padding: 4px 12px;
  border-radius: 20px;
}

@media (max-width: 768px) {
  #hero { min-height: auto; padding-top: calc(64px + var(--space-2xl)); }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .hero-visual { order: -1; }
  .hero-headline { font-size: 1.75rem; }
}

/* ------------------------------------------------------------------
   Section CTA
   ------------------------------------------------------------------ */
.section-cta {
  display: inline-block;
  background: var(--cta-coral);
  color: var(--white);
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
  margin-top: var(--space-xl);
}
.section-cta:hover {
  background: #d9845c;
  transform: translateY(-2px);
  text-decoration: none;
}

/* ------------------------------------------------------------------
   Pain Points
   ------------------------------------------------------------------ */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.pain-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: box-shadow 0.2s;
}
.pain-card:hover { box-shadow: var(--shadow-md); }
.pain-card__number { font-size: 12px; font-weight: 700; color: var(--cta-coral); margin-bottom: var(--space-sm); }
.pain-card__title { font-size: 1rem; font-weight: 700; margin-bottom: var(--space-sm); color: var(--text-primary); }
.pain-card__body { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.pain-card--alert { border-color: var(--alert-red); border-width: 2px; }
.pain-card--alert .pain-card__number { color: var(--alert-red); }

@media (max-width: 600px) { .pain-grid { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------------
   Radar Chart (CSS)
   ------------------------------------------------------------------ */
.radar-wrap {
  max-width: 400px;
  margin: 0 auto;
  text-align: center;
}
.radar-scores {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.radar-score {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 14px;
}
.radar-score__bar {
  flex: 1;
  height: 8px;
  background: var(--gray-100);
  border-radius: 4px;
  overflow: hidden;
}
.radar-score__fill {
  height: 100%;
  border-radius: 4px;
  background: var(--green-deep);
}
.radar-score__fill--low { background: var(--alert-red); }

/* ------------------------------------------------------------------
   Solution value cards
   ------------------------------------------------------------------ */
.value-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
.value-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}
.value-card__icon { margin-bottom: var(--space-md); }
.value-card__title { font-size: 1rem; font-weight: 700; margin-bottom: var(--space-sm); }
.value-card__desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

@media (max-width: 600px) { .value-cards { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------------
   Why Us features
   ------------------------------------------------------------------ */
.diff-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}
.diff-card {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  background: var(--green-bg);
}
.diff-card__title { font-size: 1rem; font-weight: 700; color: var(--green-deep); margin-bottom: var(--space-sm); }
.diff-card__desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

@media (max-width: 600px) { .diff-cards { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------------
   Full-width CTA
   ------------------------------------------------------------------ */
.cta-section {
  background: var(--green-deep) !important;
  color: var(--white);
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}
.cta-section h2 { color: var(--white); }
.cta-section p { color: rgba(255,255,255,0.85); max-width: 100%; margin: 0 auto var(--space-xl); }
.cta-section .hero-cta { background: var(--white); color: var(--green-deep); box-shadow: 0 4px 14px rgba(0,0,0,0.2); }
.cta-section .hero-cta:hover { background: var(--gray-100); }

/* ------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------ */
.site-footer {
  background: var(--text-primary);
  color: rgba(255,255,255,0.7);
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  font-size: 13px;
  line-height: 1.6;
}
.site-footer strong { color: var(--white); }
.site-footer p { margin-bottom: var(--space-sm); }

/* ------------------------------------------------------------------
   Mobile CTA Bar
   ------------------------------------------------------------------ */
.mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--cta-coral);
  padding: var(--space-md);
}
.mobile-cta a {
  display: block;
  text-align: center;
  color: var(--white);
  font-weight: 700;
  font-size: 16px;
}
.mobile-cta a:hover { text-decoration: none; }

@media (max-width: 768px) {
  .mobile-cta { display: block; }
  body { padding-bottom: 56px; }
}

/* ------------------------------------------------------------------
   Data Tables
   ------------------------------------------------------------------ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 14px;
}
.data-table th {
  background: var(--green-bg);
  font-weight: 700;
  color: var(--green-deep);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 2px solid var(--green-light);
}
.data-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--gray-100);
}
.data-table tr:hover td { background: var(--warm-gray); }

/* ------------------------------------------------------------------
   Chart Source
   ------------------------------------------------------------------ */
.chart-container { width: 100%; overflow: hidden; }
.chart-container svg { max-width: 100%; height: auto; overflow: visible; }
.chart-title { font-size: 20px; font-weight: 700; margin-bottom: var(--space-lg); color: var(--text-primary); }
.chart-subtitle { font-size: 14px; color: var(--text-secondary); margin-bottom: var(--space-md); }
.chart-source { font-size: 12px; color: var(--text-secondary); margin-top: var(--space-md); font-style: italic; }

/* ------------------------------------------------------------------
   Responsive fine-tuning
   ------------------------------------------------------------------ */
@media (max-width: 768px) {
  section { padding: var(--space-2xl) 0; }
  h2 { font-size: 1.5rem; }
  .container { padding: 0 var(--space-md); }
  .hero-grid { grid-template-columns: 1fr !important; }
}
@media (max-width: 480px) {
  h2 { font-size: 1.35rem; }
}