/* ========================================
   common.css - Fences 6 粵語官網公共樣式
   主題色: #0F59A0
   ======================================== */

/* CSS 變量 */
:root {
  --primary: #0F59A0;
  --primary-dark: #0A4178;
  --primary-light: #1A6FBF;
  --primary-ultra-light: #E8F0F9;
  --accent: #2B7DE9;
  --text-dark: #1A1A2E;
  --text-body: #3D3D56;
  --text-muted: #6B7280;
  --text-light: #9CA3AF;
  --bg-white: #FFFFFF;
  --bg-light: #F7F9FC;
  --bg-section: #F0F4F8;
  --bg-dark: #0B1D33;
  --bg-card: #FFFFFF;
  --border-light: #E5E9F0;
  --border-medium: #D1D5DB;
  --shadow-sm: 0 1px 3px rgba(15, 89, 160, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 89, 160, 0.08);
  --shadow-lg: 0 8px 32px rgba(15, 89, 160, 0.12);
  --shadow-xl: 0 16px 48px rgba(15, 89, 160, 0.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.8;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

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

/* 通用標題樣式 */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  background: var(--primary-ultra-light);
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-title span {
  color: var(--primary);
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* 通用按鈕 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(15, 89, 160, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  box-shadow: 0 6px 20px rgba(15, 89, 160, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--text-body);
  border: 1.5px solid var(--border-medium);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-ultra-light);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-ghost:hover {
  background: var(--primary);
  color: #fff;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

/* 卡片公共樣式 */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: 32px;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

/* 動畫 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 滾動條美化 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* 響應式 */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .btn-lg {
    padding: 12px 28px;
    font-size: 0.9375rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .section-title {
    font-size: 1.5rem;
  }
}