/* ==========================================================
   有笑商學院 Sonic Business Lab — 全站樣式
   依據 有笑商學院 Design System(design-system/project/)重建:
   PANTONE 2024C 橘 #F87C56|419C 墨黑 #171818|5315C 霧灰 #D8D7DF
   深色科技風為基底(DS 的 surface-*-dark tokens),
   白與霧灰只做「局部提亮」:主打課程卡、工具表單、CTA 帶。
   無漸層、無 emoji、無霓虹。
   ========================================================== */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Noto+Sans+TC:wght@400;500;700;900&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* ---- Color tokens ---- */
  --color-orange-50:  #fff4ef;
  --color-orange-100: #ffe3d6;
  --color-orange-300: #fda47f;
  --color-orange-400: #fa8e67;
  --color-orange-500: #f87c56;
  --color-orange-600: #e5623a;
  --color-orange-700: #c24e2b;

  --color-ink-900: #171818;
  --color-ink-800: #212322;
  --color-ink-700: #2c2e2e;
  --color-ink-600: #45474a;
  --color-ink-500: #6b6d72;
  --color-ink-400: #96979e;
  --color-ink-300: #c3c4ca;
  --color-ink-100: #eceeef;

  --color-mist-100: #f6f5f9;
  --color-mist-200: #ebebf1;
  --color-mist-300: #d8d7df;

  --color-white: #ffffff;
  --color-error: #c4432e;
  --color-error-bg: #fbeae6;

  /* 深色基底(DS dark surfaces) */
  --surface-page: #1b1c1e;
  --surface-deep: var(--color-ink-900);
  --surface-card: #26282b;
  --surface-accent: var(--color-orange-500);
  --surface-accent-hover: var(--color-orange-600);
  --surface-accent-subtle: var(--color-orange-50);

  --text-primary: var(--color-ink-100);
  --text-strong: var(--color-white);
  --text-secondary: var(--color-ink-400);
  --text-accent: var(--color-orange-400);

  --border-subtle: var(--color-mist-300);
  --border-default: var(--color-ink-300);
  --border-on-dark: rgba(255, 255, 255, 0.14);
  --border-on-dark-hover: rgba(255, 255, 255, 0.30);
  --focus-ring: 0 0 0 3px rgba(248, 124, 86, 0.35);

  /* ---- Type ---- */
  --font-display: 'Space Grotesk', 'Noto Sans TC', 'PingFang TC', sans-serif;
  --font-body: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Menlo, monospace;
  --tracking-tight: -0.02em;
  --tracking-wide: 0.04em;

  /* ---- Effects ---- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 2px rgba(13, 13, 13, 0.2);
  --shadow-md: 0 4px 16px rgba(13, 13, 13, 0.35);
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --duration-fast: 120ms;
  --duration-normal: 200ms;

  /* ---- Layout ---- */
  --maxw: 1160px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--surface-page);
  color: var(--text-primary);
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--font-display); letter-spacing: var(--tracking-tight); color: var(--text-strong); }

/* Lucide 圖示的通用尺寸 */
.lucide { width: 22px; height: 22px; stroke-width: 2px; }

/* ---------- 導覽列(深色,捲動後半透明模糊) ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--color-ink-900);
  border-bottom: 1px solid var(--border-on-dark);
  transition: background var(--duration-normal) var(--ease-standard);
}
.nav.scrolled {
  background: rgba(23, 24, 24, 0.92);
  backdrop-filter: blur(8px);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.nav-logo {
  font-family: var(--font-display); font-weight: 700; font-size: 20px; color: #fff;
}
.nav-logo .accent { color: var(--color-orange-500); }
.nav-logo small {
  font-family: var(--font-mono); font-weight: 400; font-size: 11px;
  color: var(--color-ink-400); letter-spacing: var(--tracking-wide); margin-left: 8px;
}
.nav-links { display: flex; gap: 28px; flex-wrap: wrap; align-items: center; }
.nav-links a {
  font-size: 14px; font-weight: 600; color: var(--color-ink-300);
  transition: color var(--duration-fast) var(--ease-standard);
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; box-shadow: 0 2px 0 var(--color-orange-500); }

/* ---------- 按鈕(radius-md,不用膠囊) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; border-radius: var(--radius-md);
  font-family: var(--font-body); font-size: 16px; font-weight: 700;
  cursor: pointer; border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--ease-standard),
              background var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--surface-accent); color: #fff; }
.btn-primary:hover { background: var(--surface-accent-hover); }
.btn-secondary { background: var(--color-ink-900); color: #fff; }
.btn-secondary:hover { background: var(--color-ink-800); }
.btn-outline { background: transparent; color: var(--text-primary); border-color: var(--border-on-dark); }
.btn-outline:hover { background: var(--color-ink-800); }
.btn-on-dark { background: transparent; color: #fff; border-color: var(--border-on-dark); }
.btn-on-dark:hover { background: var(--color-ink-800); }
.btn-sm { padding: 8px 14px; font-size: 14px; border-radius: var(--radius-sm); }
.btn-block { display: flex; width: 100%; }

/* ---------- 徽章與標籤 ---------- */
.badge {
  display: inline-flex; align-items: center; padding: 3px 10px;
  border-radius: var(--radius-full); font-size: 12px; font-weight: 700;
  letter-spacing: var(--tracking-wide);
}
.badge-accent { background: var(--surface-accent-subtle); color: var(--color-orange-700); }
.badge-neutral { background: rgba(255, 255, 255, 0.10); color: var(--color-ink-100); }
.badge-dark { background: var(--color-ink-900); color: #fff; }

.mono-label {
  font-family: var(--font-mono); font-size: 13px; color: var(--text-secondary);
  letter-spacing: var(--tracking-wide);
}

/* ---------- Hero(更深的墨黑平色塊) ---------- */
.hero {
  background: var(--surface-deep); color: #fff;
  padding: 112px 0 96px; text-align: center;
  border-bottom: 1px solid var(--border-on-dark);
}
.hero .badge { margin-bottom: 20px; }
.hero h1 {
  font-weight: 700; font-size: clamp(40px, 6vw, 64px);
  line-height: 1.15; max-width: 780px; margin: 0 auto;
}
.hero h1 .accent { color: var(--color-orange-500); }
.hero .sub {
  margin: 20px auto 0; font-size: 18px; line-height: 1.6;
  color: var(--color-ink-300); max-width: 560px;
}
.hero .cta-row { margin-top: 36px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero.compact { padding: 72px 0 64px; }

/* ---------- 區塊(深色兩階交錯) ---------- */
.section { padding: 80px 0; background: var(--surface-page); }
.section.sunken { background: var(--surface-deep); }

.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow {
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  color: var(--text-accent); letter-spacing: 0.12em; text-transform: uppercase;
}
.section-head h2 { font-size: 32px; font-weight: 700; margin-top: 8px; }
.section-head p { color: var(--text-secondary); margin-top: 10px; max-width: 640px; margin-inline: auto; }
.section-head.left { text-align: left; margin-bottom: 24px; }

/* ---------- 卡片(深色為預設;.light 為局部提亮) ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface-card); color: var(--text-primary);
  border: 1px solid var(--border-on-dark); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
}
a.card { display: flex; flex-direction: column; gap: 14px; }
a.card:hover { box-shadow: var(--shadow-md); border-color: var(--border-on-dark-hover); }
.card h3 { font-size: 18px; font-weight: 700; }
.card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.card .grow { flex: 1; }

/* 局部提亮卡:白底墨字(主打課程、工具表單用) */
.card.light {
  background: var(--color-white); border-color: var(--border-subtle);
  color: var(--color-ink-900);
}
.card.light h3 { color: var(--color-ink-900); }
.card.light p { color: var(--color-ink-500); }
.card.light .mono-label { color: var(--color-ink-500); }

.icon-chip {
  width: 44px; height: 44px; border-radius: var(--radius-md);
  background: var(--surface-accent-subtle);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-orange-600); flex-shrink: 0;
}
.card-top { display: flex; justify-content: space-between; align-items: flex-start; }
.card-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 4px; }

/* ---------- 講師區 ---------- */
.instructor { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: center; }
.instructor .avatar {
  width: 220px; height: 220px; margin: 0 auto;
  border-radius: var(--radius-lg); background: var(--surface-accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 80px; font-weight: 700;
  color: #fff; line-height: 1;
}
.instructor h3 { font-size: 24px; }
.instructor .role { color: var(--text-accent); font-weight: 700; font-size: 14px; margin: 4px 0 14px; }
.instructor > div > p { color: var(--text-secondary); }
.instructor ul { list-style: none; margin-top: 14px; }
.instructor li { padding: 5px 0 5px 28px; position: relative; color: var(--color-ink-300); font-size: 15px; }
.instructor li::before {
  content: ""; position: absolute; left: 2px; top: 12px;
  width: 14px; height: 14px;
  background: var(--color-orange-500);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") no-repeat center / contain;
}

/* ---------- 見證 ---------- */
.quote-card p { font-size: 15px; line-height: 1.7; color: var(--text-primary); margin-bottom: 16px; }
.quote-card .who { font-size: 13px; font-weight: 700; color: var(--text-accent); }
.quote-card .who span { display: block; font-size: 12px; font-weight: 400; color: var(--text-secondary); }

/* ---------- CTA 帶狀區(霧灰局部提亮) ---------- */
.cta-band {
  background: var(--color-mist-100); color: var(--color-ink-900);
  border-radius: var(--radius-xl); padding: 48px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.cta-band h2 { font-size: 24px; font-weight: 700; color: var(--color-ink-900); }
.cta-band p { margin-top: 6px; color: var(--color-ink-500); font-size: 15px; }

/* ---------- 頁尾 ---------- */
footer {
  background: var(--surface-deep); color: var(--color-ink-300);
  padding: 48px 0 0; border-top: 1px solid var(--border-on-dark);
}
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  font-size: 13px;
}
footer .brand { font-family: var(--font-display); font-weight: 700; font-size: 18px; color: #fff; margin-bottom: 8px; }
footer .brand .accent { color: var(--color-orange-500); }
footer .foot-bottom {
  border-top: 1px solid var(--border-on-dark); margin-top: 32px;
  padding: 16px 24px; font-size: 12px; text-align: center;
}

/* ---------- 課程詳細頁 ---------- */
.course-hero {
  background: var(--surface-deep); color: #fff; padding: 72px 0 64px;
  border-bottom: 1px solid var(--border-on-dark);
}
.course-hero .badge { margin-bottom: 16px; }
.course-hero h1 { font-size: clamp(28px, 4.5vw, 44px); font-weight: 700; line-height: 1.3; max-width: 820px; }
.course-hero .sub { color: var(--color-ink-300); margin-top: 14px; font-size: 18px; max-width: 720px; }
.course-hero .facts { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.course-hero .facts span {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: var(--tracking-wide);
  padding: 7px 14px; border: 1px solid var(--border-on-dark); border-radius: var(--radius-sm);
  color: var(--color-ink-300);
}
.course-hero .facts .price-fact { color: var(--color-orange-400); border-color: var(--color-orange-700); }
.narrow { max-width: 820px; }

.check-list { list-style: none; }
.check-list li { padding: 8px 0 8px 32px; position: relative; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 14px;
  width: 16px; height: 16px;
  background: var(--color-orange-500);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") no-repeat center / contain;
}

.syllabus-item {
  background: var(--surface-card); border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-lg); padding: 22px 26px; margin-bottom: 14px; box-shadow: var(--shadow-sm);
}
.syllabus-item h4 { font-family: var(--font-display); color: var(--text-accent); margin-bottom: 8px; font-size: 17px; }
.syllabus-item li { color: var(--color-ink-300); margin-left: 20px; padding: 2px 0; font-size: 15px; }

details.faq {
  background: var(--surface-card); border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-lg); padding: 18px 24px; margin-bottom: 12px; box-shadow: var(--shadow-sm);
}
details.faq summary { cursor: pointer; font-weight: 700; color: var(--text-strong); list-style: none; position: relative; padding-right: 28px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+"; position: absolute; right: 0; top: 0;
  color: var(--color-orange-400); font-size: 20px; font-family: var(--font-display);
}
details.faq[open] summary::after { content: "–"; }
details.faq p { margin-top: 10px; color: var(--text-secondary); font-size: 15px; }

/* ---------- 表單(AI 工具箱:白色局部提亮) ---------- */
.tool-form {
  background: var(--color-white); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow-md);
  color: var(--color-ink-900);
}
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field label { display: block; font-weight: 700; font-size: 14px; margin-bottom: 6px; color: var(--color-ink-900); }
.field .hint { font-weight: 400; color: var(--color-ink-500); font-size: 12px; }
.field input, .field select {
  width: 100%; padding: 11px 14px; border-radius: var(--radius-md);
  border: 1px solid var(--color-ink-300); background: var(--color-white);
  color: var(--color-ink-900); font-size: 15px; font-family: var(--font-body);
  transition: box-shadow var(--duration-fast) var(--ease-standard);
}
.field input:focus, .field select:focus { outline: none; box-shadow: var(--focus-ring); border-color: var(--color-orange-500); }
.form-error {
  color: var(--color-error); background: var(--color-error-bg);
  border-radius: var(--radius-md); padding: 10px 14px;
  margin-top: 14px; font-weight: 700; font-size: 14px; display: none;
}

.result-summary {
  border: 1px solid var(--border-on-dark); border-left: 4px solid var(--color-orange-500);
  border-radius: var(--radius-lg); padding: 20px 26px; margin-bottom: 24px;
  background: var(--surface-card);
}
.result-summary strong { color: var(--text-strong); }
.result-summary div { color: var(--text-secondary); font-size: 14px; }
.proposal-card h3 { color: var(--text-accent); font-size: 18px; }
.proposal-card .slogan { color: var(--text-strong); font-weight: 700; margin: 8px 0 14px; font-size: 15px; }
.proposal-card h5 {
  font-family: var(--font-mono); font-weight: 500; font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-secondary); margin: 16px 0 6px;
}
.proposal-card ul { list-style: none; }
.proposal-card ul li { padding: 3px 0 3px 20px; position: relative; color: var(--text-primary); font-size: 14px; }
.proposal-card ul li::before {
  content: ""; position: absolute; left: 2px; top: 11px;
  width: 6px; height: 6px; border-radius: 1px; background: var(--color-orange-500);
}
.proposal-card .budget-line {
  display: flex; justify-content: space-between; padding: 3px 0;
  font-size: 13px; color: var(--text-secondary); font-family: var(--font-mono);
}
.proposal-card > p { font-size: 14px; color: var(--text-secondary); }

.loading {
  text-align: center; padding: 40px; display: none;
  font-family: var(--font-mono); font-size: 14px; color: var(--text-accent);
}

/* ---------- 響應式 ---------- */
@media (max-width: 860px) {
  .grid-3, .grid-2, .form-grid { grid-template-columns: 1fr; }
  .instructor { grid-template-columns: 1fr; }
  .nav-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .nav-links { gap: 18px; }
  .hero { padding: 72px 0 56px; }
  .section { padding: 56px 0; }
  .cta-band { flex-direction: column; text-align: center; padding: 36px 24px; }
}