/* 香港升學資訊 — 官網樣式
   深色品牌風，對應 iOS App 設計語言 (teal + amber on #1A1B2E) */

:root {
  --bg: #1a1b2e;
  --bg-soft: #22243c;
  --bg-card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.1);
  --text: #f1f5f9;
  --muted: rgba(241, 245, 249, 0.65);
  --faint: rgba(241, 245, 249, 0.45);
  --teal: #2dd4bf;
  --teal-dark: #0d9488;
  --amber: #fbbf24;
  --amber-soft: #fde68a;
  --blue: #60a5fa;
  --coral: #fb7185;
  --radius: 20px;
  --max: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang HK",
    "PingFang TC", "Noto Sans HK", "Microsoft JhengHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--teal); }

/* ---------- 導航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(26, 27, 46, 0.82);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 17px;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 20px;
  background: linear-gradient(135deg, #ea580c, #0d9488);
}
.nav-links {
  margin-left: auto;
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 10px;
}
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.07); }
.nav-cta {
  background: var(--teal) !important;
  color: #1a1b2e !important;
}
.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  font-size: 18px;
  padding: 6px 12px;
  cursor: pointer;
}

/* ---------- 版面 ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
section { padding: 72px 0; }
.section-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--teal);
  margin-bottom: 12px;
}
h2.section-title {
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 900;
  margin: 0 0 12px;
  letter-spacing: -0.5px;
}
.section-sub { color: var(--muted); max-width: 640px; margin: 0 0 32px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
}
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}
.hero::before {
  width: 480px; height: 480px;
  background: rgba(45, 212, 191, 0.16);
  top: -160px; right: -120px;
}
.hero::after {
  width: 380px; height: 380px;
  background: rgba(37, 99, 235, 0.18);
  bottom: -180px; left: -120px;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--amber-soft);
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.3);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.2;
  font-weight: 900;
  margin: 0 0 16px;
  letter-spacing: -1px;
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--teal), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead { color: var(--muted); font-size: 18px; margin: 0 0 28px; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-weight: 800;
  font-size: 16px;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(90deg, #14b8a6, #0d9488);
  color: #fff;
  box-shadow: 0 8px 24px rgba(45, 212, 191, 0.35);
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); }
.btn-amber {
  background: linear-gradient(90deg, var(--amber-soft), var(--amber));
  color: #1a1b2e;
  box-shadow: 0 8px 24px rgba(251, 191, 36, 0.3);
}
.hero-stats {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.hero-stats .stat b { display: block; font-size: 26px; font-weight: 900; color: var(--amber); }
.hero-stats .stat span { font-size: 13px; color: var(--muted); }

/* ---------- 手機 mockup ---------- */
.phone-stage { display: flex; justify-content: center; }
.phone {
  width: 270px;
  height: 560px;
  border-radius: 44px;
  border: 10px solid #0b0c18;
  outline: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(160deg, #232544, #14152a);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  position: relative;
}
.phone-notch {
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 100px; height: 24px;
  background: #0b0c18;
  border-radius: 999px;
}
.phone-screen { padding: 52px 16px 16px; }
.phone-screen .app-name {
  font-weight: 900; font-size: 19px; text-align: center; margin-bottom: 2px;
}
.phone-screen .app-sub {
  text-align: center; font-size: 11px; color: var(--muted); margin-bottom: 14px;
}
.mock-card {
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 10px 12px;
  margin-bottom: 10px;
  font-size: 12px;
}
.mock-card.hero-mock {
  background: linear-gradient(135deg, #0d9488, #16a34a);
  border: none;
  font-weight: 800;
  font-size: 13px;
}
.mock-card small { color: rgba(255, 255, 255, 0.7); display: block; font-weight: 400; }
.mock-row { display: flex; gap: 8px; }
.mock-row .mock-card { flex: 1; text-align: center; font-weight: 800; }
.mock-pill {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  background: rgba(45, 212, 191, 0.2);
  color: var(--teal);
  border-radius: 999px;
  padding: 2px 8px;
  margin-top: 4px;
}

/* ---------- 信任列 ---------- */
.trust {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
}
.trust p { margin: 0 0 14px; font-size: 13px; color: var(--faint); letter-spacing: 1px; font-weight: 700; }
.trust-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.trust-badges span {
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 999px;
}

/* ---------- 功能卡 ---------- */
.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.card .icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 800; }
.card p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------- 學制 ---------- */
.level-kg .icon { background: rgba(251, 113, 133, 0.15); }
.level-pri .icon { background: rgba(45, 212, 191, 0.15); }
.level-sec .icon { background: rgba(96, 165, 250, 0.15); }
.card ul { margin: 12px 0 0; padding-left: 20px; font-size: 14px; color: var(--muted); }
.card ul li { margin-bottom: 4px; }

/* ---------- 步驟 ---------- */
.steps { counter-reset: step; }
.step { position: relative; padding-top: 8px; }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-size: 40px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--teal);
  display: block;
  margin-bottom: 8px;
}

/* ---------- FAQ ---------- */
details.faq {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 12px;
}
details.faq summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 16px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--teal); font-size: 22px; font-weight: 400; }
details.faq[open] summary::after { content: "−"; }
details.faq p { color: var(--muted); font-size: 15px; margin: 12px 0 4px; }

/* ---------- 打賞 banner ---------- */
.coffee {
  background: linear-gradient(135deg, #3b2417, #2a1e33);
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: 28px;
  padding: 48px 40px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.coffee::before {
  content: "";
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(251, 191, 36, 0.14);
  filter: blur(70px);
  top: -100px; right: -60px;
}
.coffee h2 { margin: 0 0 10px; font-size: clamp(22px, 4vw, 30px); font-weight: 900; }
.coffee p { margin: 0 0 20px; color: var(--muted); }
.coffee-cup { font-size: 72px; }

/* ---------- 頁尾 ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  color: var(--faint);
  font-size: 13px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
footer h4 { color: var(--text); font-size: 14px; margin: 0 0 12px; }
footer a { color: var(--muted); text-decoration: none; display: block; margin-bottom: 8px; }
footer a:hover { color: var(--teal); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: space-between;
}

/* ---------- 內頁 ---------- */
.page-hero { padding: 64px 0 24px; }
.page-hero h1 { font-size: clamp(28px, 5vw, 42px); font-weight: 900; margin: 0 0 12px; }
.prose { max-width: 760px; }
.prose h2 { font-size: 20px; margin: 36px 0 10px; }
.prose p, .prose li { color: var(--muted); font-size: 15px; }
.prose a { color: var(--teal); }

/* ---------- 響應式 ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .phone-stage { order: -1; }
  .phone { width: 240px; height: 500px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .coffee { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  section { padding: 52px 0; }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px; left: 12px; right: 12px;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 8px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .grid-4 { grid-template-columns: 1fr; }
}