/* ==========================================================================
   創新未來學校 (bplan.com.tw) 現代化自託管 SSR 樣式表
   遵循 /site-migration 原則：
   1. 尊重原作品牌氣質
   2. 手機視覺 100% 還原、滿版透明 Header
   3. 品牌字與標題強制 white-space: nowrap !important 與 clamp() 絕不折行
   4. 行動端底部常駐工具列
   ========================================================================== */

:root {
  --primary: #F37021;
  --primary-hover: #D95D12;
  --navy: #1B365D;
  --navy-dark: #0F2038;
  --navy-light: #2A4A7A;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --bg-main: #FFFFFF;
  --bg-alt: #F9FAFB;
  --bg-card: #FFFFFF;
  --border-color: #E5E7EB;
  --line-color: #06C755;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-main);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器與版面 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-narrow {
  max-width: 860px;
}

/* ==========================================================================
   Header & 導覽選單 (鐵則：手機 Header 透明懸浮、LOGO 絕不折行)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
  box-shadow: var(--shadow-sm);
}

body.is-home .site-header {
  background-color: rgba(27, 54, 93, 0.2);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: none;
}

body.is-home .site-header.scrolled {
  background-color: rgba(27, 54, 93, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap !important;
  text-decoration: none;
}

.brand-logo {
  height: 38px;
  width: auto;
  object-fit: contain;
  white-space: nowrap !important;
}

.brand-title {
  font-size: clamp(1.05rem, 3.8vw, 1.35rem);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.5px;
  white-space: nowrap !important;
}

body.is-home .brand-title {
  color: #FFFFFF;
}

/* 桌面主選單 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--navy);
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: color 0.2s ease;
}

body.is-home .nav-link {
  color: #FFFFFF;
}

.nav-link:hover {
  color: var(--primary);
}

body.is-home .nav-link:hover {
  color: #FFC091;
}

/* 下拉選單 */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  min-width: 260px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 100;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 10px 18px;
  font-size: 0.9rem;
  color: var(--text-main);
  transition: background 0.15s ease, color 0.15s ease;
}

.dropdown-link:hover {
  background: #FFF7ED;
  color: var(--primary);
}

.nav-cta {
  background: var(--primary);
  color: #FFFFFF !important;
  padding: 8px 18px;
  border-radius: 50px;
  font-weight: 600;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.nav-cta:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* 手機漢堡選單按鈕 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  height: 2.5px;
  width: 100%;
  background-color: var(--navy);
  border-radius: 2px;
  transition: all 0.3s ease;
}

body.is-home .menu-toggle span {
  background-color: #FFFFFF;
}

body.is-home .site-header.scrolled .menu-toggle span {
  background-color: #FFFFFF;
}

/* 手機抽屜導覽 */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: #FFFFFF;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 999;
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav-link {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-sublinks {
  padding-left: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

.mobile-sublink {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Hero 首頁主視覺
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0A192F 0%, #1B365D 50%, #2A4A7A 100%);
  color: #FFFFFF;
  padding: calc(var(--header-height) + 40px) 0 60px 0;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(243, 112, 33, 0.15), transparent 40%),
              radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.15), transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  background: rgba(243, 112, 33, 0.2);
  color: #FFC091;
  border: 1px solid rgba(243, 112, 33, 0.4);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

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

.hero-subtitle {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 36px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(243, 112, 33, 0.35);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(243, 112, 33, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ==========================================================================
   區塊標題通用樣式
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px auto;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* ==========================================================================
   課程卡片網格 (Cards Grid)
   ========================================================================== */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.course-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(243, 112, 33, 0.3);
}

.course-card-header {
  padding: 24px;
  background: linear-gradient(135deg, #1B365D 0%, #2A4A7A 100%);
  color: #FFFFFF;
}

.course-category-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: #FFC091;
  background: rgba(243, 112, 33, 0.25);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 10px;
}

.course-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  color: #FFFFFF;
}

.course-card-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.course-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
}

.course-more-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.course-more-link:hover {
  color: var(--primary-hover);
}

/* ==========================================================================
   部落格專文卡片 (Blog Cards)
   ========================================================================== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.post-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(243, 112, 33, 0.3);
}

.post-card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #E5E7EB;
  overflow: hidden;
}

.post-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.post-card:hover .post-card-thumb img {
  transform: scale(1.04);
}

.post-card-body {
  padding: 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.post-category-badge {
  background: #FFF7ED;
  color: var(--primary);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}

.post-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-date {
  font-size: 0.8rem;
  color: #9CA3AF;
  margin-top: auto;
}

/* ==========================================================================
   下載區 Lead Magnet CTA
   ========================================================================== */
.lead-magnet-card {
  background: linear-gradient(135deg, #1B365D 0%, #0F2038 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  box-shadow: var(--shadow-lg);
}

.lead-magnet-info {
  max-width: 600px;
}

.lead-magnet-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 14px;
}

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

.lead-magnet-desc {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* ==========================================================================
   文章閱讀頁面 (Article Detail)
   ========================================================================== */
.article-header {
  padding: calc(var(--header-height) + 30px) 0 40px 0;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.article-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.35;
  margin-bottom: 18px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-cover {
  margin: 40px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.article-body {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #2D3748;
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--navy);
  margin: 40px 0 18px 0;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--navy);
  margin: 30px 0 14px 0;
}

.article-body p {
  margin-bottom: 22px;
}

.article-body figure {
  margin: 30px 0;
  text-align: center;
}

.article-body figure img {
  border-radius: var(--radius-sm);
  margin: 0 auto;
}

.article-body figcaption {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.article-body ul, .article-body ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 4px solid var(--navy-light);
  background: var(--bg-alt);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--navy);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--navy-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px 0;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col-title {
  color: #FFFFFF;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   行動端底部常駐工具列 (Mobile Floating Toolbar)
   ========================================================================== */
.mobile-toolbar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 56px;
  background: #FFFFFF;
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
  z-index: 1000;
  justify-content: space-around;
  align-items: center;
}

.mobile-tool-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 0.7rem;
  color: var(--text-main);
  font-weight: 600;
  flex: 1;
  text-align: center;
}

.mobile-tool-item.line {
  color: var(--line-color);
}

.mobile-tool-item.phone {
  color: var(--primary);
}

/* ==========================================================================
   響應式斷點 (RWD)
   ========================================================================== */
@media (max-width: 960px) {
  .main-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 62px;
  }
  body {
    padding-bottom: 56px; /* 為手機底部工具列預留空間 */
  }
  .mobile-toolbar {
    display: flex;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .lead-magnet-card {
    flex-direction: column;
    padding: 30px 20px;
    text-align: center;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* 頁尾聯絡表單 */
.contact-block {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 32px;
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.contact-intro p { font-size: 0.9rem; line-height: 1.7; margin-bottom: 16px; }
.contact-line { display: inline-block; padding: 8px 16px; font-size: 0.9rem; }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  font: inherit;
  font-size: 0.95rem;
}
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(255, 255, 255, 0.55); }
.contact-form input[name="subject"], .contact-form textarea, .contact-form .contact-status { grid-column: 1 / -1; }
.contact-form button { justify-self: start; border: none; cursor: pointer; }
.contact-form button:disabled { opacity: 0.6; cursor: wait; }
.contact-status { font-size: 0.9rem; min-height: 1.2em; margin: 0; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
@media (max-width: 768px) {
  .contact-block { grid-template-columns: 1fr; gap: 20px; }
  .contact-form { grid-template-columns: 1fr; }
}

/* 靜態頁／課程頁圖片 */
.page-gallery { display: grid; gap: 16px; margin-top: 32px; }
.page-gallery img { width: 100%; height: auto; border-radius: var(--radius-md, 10px); display: block; }