/* ============================================
   呈分試攻略 — hkp5exam.hk
   設計風格：都金心法 × 家長友善
   主色：深藍 #0B2545（信任）
   重點：橙色 #F4A261（行動）
   ============================================ */

:root {
  --c-navy: #0B2545;
  --c-navy-light: #13315C;
  --c-navy-dark: #061838;
  --c-orange: #F4A261;
  --c-orange-dark: #E76F51;
  --c-cream: #FDF6EC;
  --c-bg: #FBFAF7;
  --c-white: #FFFFFF;
  --c-text: #1A1F2E;
  --c-text-muted: #5C6478;
  --c-border: #E4E1D9;
  --c-success: #2A9D8F;

  --font-serif: 'Noto Serif TC', Georgia, serif;
  --font-sans: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;

  --shadow-sm: 0 1px 3px rgba(11, 37, 69, 0.08);
  --shadow-md: 0 4px 16px rgba(11, 37, 69, 0.10);
  --shadow-lg: 0 12px 40px rgba(11, 37, 69, 0.14);

  --radius: 12px;
  --radius-lg: 20px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* TYPOGRAPHY */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-navy);
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.15; font-weight: 900; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); line-height: 1.25; }
h3 { font-size: 1.3rem; line-height: 1.35; }
h4 { font-size: 1.1rem; line-height: 1.4; }

p { color: var(--c-text); }
.lead { font-size: 1.15rem; color: var(--c-text-muted); line-height: 1.7; }
.eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-orange-dark);
  margin-bottom: 12px;
}
.eyebrow.center, .section-title.center, .section-lead.center { text-align: center; }
.section-title { margin-bottom: 12px; }
.section-lead { color: var(--c-text-muted); margin-bottom: 48px; font-size: 1.05rem; }
.accent { color: var(--c-orange-dark); }

/* HEADER */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-navy);
}
.logo-text {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}
.main-nav {
  display: flex;
  gap: 32px;
}
.main-nav a {
  color: var(--c-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--c-orange-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-navy);
  border-radius: 2px;
}

/* HERO */
.hero {
  padding: 80px 0 100px;
  background: linear-gradient(135deg, var(--c-cream) 0%, var(--c-bg) 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(244, 162, 97, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  position: relative;
}
.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 5;
  max-height: 560px;
}
.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero-image-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  padding: 12px 18px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-navy);
}
.hero-image-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-success);
  box-shadow: 0 0 0 4px rgba(42,157,143,0.2);
}
.hero-content h1 { margin-bottom: 24px; }
.hero-content .lead { margin-bottom: 36px; max-width: 520px; }
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.25s ease;
  border: 2px solid transparent;
  cursor: pointer;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--c-navy);
  color: var(--c-white);
}
.btn-primary:hover {
  background: var(--c-orange-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: transparent;
  color: var(--c-navy);
  border-color: var(--c-navy);
}
.btn-secondary:hover {
  background: var(--c-navy);
  color: var(--c-white);
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.hero-stats > div {
  display: flex;
  flex-direction: column;
}
.hero-stats strong {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 900;
  color: var(--c-orange-dark);
  line-height: 1;
}
.hero-stats span {
  font-size: 0.9rem;
  color: var(--c-text-muted);
  margin-top: 4px;
}

.hero-visual {
  position: relative;
  height: 440px;
}

/* SECTION IMAGES (generic illustration block) */
.section-image {
  width: 100%;
  max-width: 520px;
  height: auto;
  border-radius: var(--radius);
  display: block;
}
.section-image.center { margin: 0 auto; }

/* TOPICS GRID (9 核心議題) */
.topics { padding: 100px 0; background: var(--c-cream); }
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.topic-card {
  background: var(--c-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}
.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-orange);
}
.topic-card-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--c-bg);
}
.topic-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.topic-card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-orange-dark);
  margin-bottom: 8px;
}
.topic-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin-bottom: 10px;
  line-height: 1.35;
}
.topic-card p {
  color: var(--c-text-muted);
  font-size: 0.93rem;
  line-height: 1.6;
  flex: 1;
}
.topic-card .card-link { margin-top: 14px; }

/* PRACTICE CARD IMAGE */
.practice-card-image {
  width: calc(100% + 64px);
  margin: -32px -32px 20px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--c-cream);
}
.hero-card {
  position: absolute;
  background: var(--c-white);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 260px;
  border: 1px solid var(--c-border);
  transition: transform 0.3s;
}
.hero-card:hover { transform: translateY(-4px); }
.card-1 { top: 0; left: 20px; transform: rotate(-3deg); }
.card-2 { top: 120px; right: 0; transform: rotate(2deg); }
.card-3 { bottom: 0; left: 60px; transform: rotate(-1deg); }
.card-badge {
  display: inline-block;
  font-size: 0.8rem;
  background: var(--c-cream);
  color: var(--c-navy);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 700;
  margin-bottom: 12px;
}
.card-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--c-navy);
  margin-bottom: 6px;
}
.card-meta {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

/* WHY */
.why { padding: 80px 0; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.why-card {
  background: var(--c-white);
  padding: 32px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  transition: all 0.25s;
}
.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-orange);
}
.why-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}
.why-card h3 { margin-bottom: 10px; font-family: var(--font-serif); }
.why-card p { color: var(--c-text-muted); font-size: 0.95rem; line-height: 1.6; }

/* PRACTICE */
.practice {
  padding: 100px 0;
  background: var(--c-white);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}
.practice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-bottom: 48px;
}
.practice-card {
  display: block;
  background: var(--c-bg);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--c-border);
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  position: relative;
}
.practice-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-orange);
  background: var(--c-white);
}
.practice-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.practice-tag.math { background: #E8F1FF; color: #1E40AF; }
.practice-tag.chinese { background: #FEF3E8; color: #C2410C; }
.practice-card h3 {
  font-family: var(--font-serif);
  margin-bottom: 12px;
  font-size: 1.35rem;
}
.practice-card p {
  color: var(--c-text-muted);
  margin-bottom: 20px;
  font-size: 0.95rem;
  line-height: 1.6;
}
.features {
  list-style: none;
  margin-bottom: 24px;
}
.features li {
  font-size: 0.9rem;
  color: var(--c-text);
  padding: 4px 0;
}
.card-link {
  display: inline-block;
  color: var(--c-orange-dark);
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s;
}
.practice-card:hover .card-link { transform: translateX(4px); }

.coming-soon {
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-navy-light) 100%);
  color: var(--c-white);
  padding: 32px 40px;
  border-radius: var(--radius-lg);
  text-align: center;
}
.coming-soon h3 {
  color: var(--c-white);
  margin-bottom: 8px;
}
.coming-soon p { color: rgba(255,255,255,0.9); }
.coming-soon a {
  color: var(--c-orange);
  text-decoration: none;
  font-weight: 700;
}

/* COMING SOON — INLINE (small notice inside cards) */
.coming-soon-inline {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 12px;
  background: rgba(244, 162, 97, 0.12);
  color: var(--c-orange-dark);
  border: 1px dashed var(--c-orange);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* COMING SOON — CARD (subdued blog placeholder) */
.coming-soon-card {
  background: var(--c-bg);
  border: 1px dashed var(--c-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  opacity: 0.85;
}
.coming-soon-card h3 {
  font-family: var(--font-serif);
  color: var(--c-text-muted);
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.coming-soon-card p {
  color: var(--c-text-muted);
  font-size: 0.92rem;
  margin-bottom: 14px;
}
.card-link.disabled {
  color: var(--c-text-muted);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9rem;
  cursor: default;
  opacity: 0.75;
}
.card-link.disabled:hover { transform: none; }

/* PRACTICE CARD — FEATURE LIST SPACING */
.practice-card .features { margin-bottom: 28px; }
.practice-card .features li {
  padding: 6px 0;
  line-height: 1.5;
}

/* GUIDES */
.guides { padding: 100px 0; }
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.guide-card {
  background: var(--c-white);
  padding: 32px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  position: relative;
  transition: all 0.25s;
}
.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-navy);
}
.guide-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--c-orange);
  line-height: 1;
  margin-bottom: 16px;
}
.guide-card h3 {
  margin-bottom: 12px;
  font-family: var(--font-serif);
}
.guide-card p {
  color: var(--c-text-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.6;
}

/* BLOG */
.blog { padding: 100px 0; background: var(--c-white); border-top: 1px solid var(--c-border); }
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-bottom: 48px;
}
.blog-card {
  background: var(--c-bg);
  padding: 32px;
  border-radius: var(--radius);
  transition: all 0.25s;
  border: 1px solid var(--c-border);
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.blog-meta {
  font-size: 0.85rem;
  color: var(--c-orange-dark);
  font-weight: 600;
  margin-bottom: 12px;
}
.blog-card h3 {
  margin-bottom: 12px;
  font-size: 1.2rem;
  font-family: var(--font-serif);
  line-height: 1.4;
}
.blog-card p {
  color: var(--c-text-muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.6;
}
.blog-cta { text-align: center; }

/* ABOUT */
.about { padding: 100px 0; }
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-grid h2 { margin-bottom: 20px; }
.about-grid p {
  color: var(--c-text);
  margin-bottom: 18px;
  font-size: 1.05rem;
  line-height: 1.75;
}
.signature {
  margin-top: 24px;
  font-style: italic;
  color: var(--c-text-muted);
}
.about-values {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.value {
  background: var(--c-cream);
  padding: 24px;
  border-radius: var(--radius);
  border-left: 4px solid var(--c-orange);
}
.value h4 { margin-bottom: 8px; }
.value p { color: var(--c-text-muted); font-size: 0.95rem; }

/* MEMBER CTA */
.member-cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-navy-light) 100%);
  color: var(--c-white);
  text-align: center;
}
.member-cta .eyebrow { color: var(--c-orange); }
.member-cta h2 { color: var(--c-white); margin-bottom: 16px; }
.member-cta .section-lead { color: rgba(255,255,255,0.85); margin-bottom: 32px; }
.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}
.subscribe-form input {
  flex: 1;
  min-width: 240px;
  padding: 14px 20px;
  border-radius: 10px;
  border: 2px solid transparent;
  font-size: 1rem;
  font-family: var(--font-sans);
}
.subscribe-form input:focus {
  outline: none;
  border-color: var(--c-orange);
}

/* CONTACT */
.contact { padding: 100px 0; background: var(--c-white); border-top: 1px solid var(--c-border); }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 48px;
}
.contact-card {
  background: var(--c-bg);
  padding: 24px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--c-border);
  transition: all 0.2s;
}
.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--c-orange);
}
.contact-icon { font-size: 2rem; }
.contact-card strong { display: block; color: var(--c-navy); margin-bottom: 4px; }
.contact-card p { font-size: 0.9rem; color: var(--c-text-muted); }

/* FOOTER */
.site-footer {
  background: var(--c-navy-dark);
  color: rgba(255,255,255,0.85);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-logo {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--c-white);
  margin-bottom: 8px;
}
.footer-tagline {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}
.site-footer h5 {
  color: var(--c-orange);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.site-footer a {
  display: block;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  padding: 4px 0;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.site-footer a:hover { color: var(--c-orange); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
}
.footer-bottom p { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-bottom .small { font-size: 0.8rem; margin-top: 4px; }

/* RESPONSIVE */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { height: 380px; }
  .hero-card { width: 220px; padding: 18px; }
  .hero-image-wrap { aspect-ratio: 4 / 3; max-height: 420px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero { padding: 60px 0 80px; }
  .hero-stats { gap: 24px; }
  .hero-stats strong { font-size: 1.6rem; }
  .why, .practice, .guides, .blog, .about, .contact, .member-cta { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-cta .btn { padding: 12px 20px; font-size: 0.95rem; }
  .hero-card { width: 200px; }
  .card-1 { left: 0; }
  .card-2 { right: 0; }
  .card-3 { left: 30px; }
}