/* ===========================================================
   AI賦能第二人生實驗室 — 全站共用樣式
   設計系統：色彩變數、版面、header/nav/footer、共用元件
   =========================================================== */

:root {
  /* 品牌色 */
  --color-primary: #0f9e9e;       /* 主色：teal */
  --color-primary-dark: #0a7676;
  --color-accent: #ff7a5c;        /* 輔色：coral */
  --color-accent-dark: #e85f41;

  /* 中性色 */
  --color-ink: #1d2b2b;
  --color-body: #41514f;
  --color-muted: #6d7c7a;
  --color-line: #e2eceb;
  --color-surface: #ffffff;
  --color-surface-alt: #f3f9f8;
  --color-bg: #fbfdfd;

  /* 排版 */
  --font-base: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --fs-hero: clamp(2.1rem, 5vw, 3.6rem);
  --fs-h2: clamp(1.6rem, 3.5vw, 2.4rem);
  --fs-h3: clamp(1.15rem, 2vw, 1.4rem);
  --fs-body: clamp(1rem, 1.3vw, 1.12rem);

  /* 版面 */
  --maxw: 1140px;
  --gutter: clamp(1.2rem, 4vw, 3rem);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 14px 40px rgba(15, 158, 158, 0.12);
  --shadow-sm: 0 6px 18px rgba(29, 43, 43, 0.08);
  --transition: 0.25s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-base);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--color-body);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--color-primary-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-dark); }
h1, h2, h3, h4 { color: var(--color-ink); line-height: 1.25; font-weight: 800; }

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section--alt { background: var(--color-surface-alt); }

.section-head { max-width: 720px; margin-inline: auto; text-align: center; margin-bottom: clamp(2rem, 4vw, 3rem); }
.section-head .eyebrow { color: var(--color-primary); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; font-size: .82rem; }
.section-head h2 { font-size: var(--fs-h2); margin-top: .5rem; }
.section-head p { color: var(--color-muted); margin-top: .8rem; }

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .7em 1.5em;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn--accent { background: var(--color-accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn--accent:hover { background: var(--color-accent-dark); color: #fff; }
.btn--ghost { background: transparent; border-color: rgba(255,255,255,.7); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.15); color: #fff; }
.btn--outline { background: transparent; border-color: var(--color-primary); color: var(--color-primary-dark); }
.btn--outline:hover { background: var(--color-primary); color: #fff; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding-block: .85rem;
}
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 800; color: var(--color-ink); font-size: 1.05rem; }
.brand .brand-mark {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: grid; place-items: center; color: #fff; font-weight: 800;
}
.nav-links { display: flex; align-items: center; gap: clamp(.8rem, 2vw, 1.6rem); list-style: none; }
.nav-links a { color: var(--color-body); font-weight: 600; }
.nav-links a:hover, .nav-links a.is-active { color: var(--color-primary-dark); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .4rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-ink); margin: 5px 0; transition: var(--transition); }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; inset: 100% 0 auto; flex-direction: column; align-items: stretch;
    background: #fff; padding: 1rem var(--gutter); gap: .2rem;
    border-bottom: 1px solid var(--color-line); box-shadow: var(--shadow-sm);
    transform: translateY(-130%); transition: transform var(--transition); z-index: -1;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: .7rem 0; border-bottom: 1px solid var(--color-line); }
  .nav-links .btn { margin-top: .5rem; justify-content: center; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; color: #fff; isolation: isolate;
  background: linear-gradient(120deg, rgba(10,118,118,.92), rgba(15,158,158,.78)), var(--color-primary);
  background-size: cover; background-position: center;
}
.hero--image { background: linear-gradient(120deg, rgba(10,118,118,.82), rgba(15,158,158,.55)), url('../images2/hero-bg.png'); background-size: cover; background-position: center; }
.hero-inner { padding-block: clamp(3.5rem, 9vw, 7rem); max-width: 760px; }
.hero .eyebrow { display: inline-block; background: rgba(255,255,255,.18); padding: .3em 1em; border-radius: 999px; font-weight: 700; font-size: .85rem; }
.hero h1 { color: #fff; font-size: var(--fs-hero); margin-top: 1rem; }
.hero p { color: rgba(255,255,255,.92); font-size: clamp(1.05rem, 1.6vw, 1.3rem); margin-top: 1rem; max-width: 60ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

.page-hero { background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary)); color: #fff; }
.page-hero .hero-inner { padding-block: clamp(2.6rem, 6vw, 4.5rem); }
.page-hero h1 { color: #fff; font-size: var(--fs-hero); }
.page-hero p { color: rgba(255,255,255,.9); margin-top: .8rem; }

/* ---------- 卡片網格 ---------- */
.grid { display: grid; gap: clamp(1.2rem, 3vw, 2rem); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }

.card {
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2rem);
  box-shadow: var(--shadow-sm); transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  font-size: 1.5rem; margin-bottom: 1rem; color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}
.card h3 { font-size: var(--fs-h3); margin-bottom: .5rem; }
.card p { color: var(--color-muted); }

/* 圖文卡 */
.media-card { overflow: hidden; padding: 0; }
.media-card img { aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.media-card .media-body { padding: clamp(1.3rem, 3vw, 1.8rem); }

/* ---------- 左右圖文 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 5vw, 4rem); align-items: center; }
.split img { border-radius: var(--radius); box-shadow: var(--shadow); }
.split .eyebrow { color: var(--color-primary); font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .82rem; }
.split h2 { font-size: var(--fs-h2); margin: .5rem 0 1rem; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } .split--reverse .split-media { order: -1; } }

/* ---------- 列表 ---------- */
.check-list { list-style: none; display: grid; gap: .7rem; margin-top: 1rem; }
.check-list li { position: relative; padding-left: 1.8rem; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--color-primary); font-weight: 800; }

/* ---------- 統計 ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1.5rem; text-align: center; }
.stats .stat-num { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; color: var(--color-primary); }
.stats .stat-label { color: var(--color-muted); }

/* ---------- 步驟 ---------- */
.steps { counter-reset: step; display: grid; gap: clamp(1.2rem, 3vw, 2rem); }
.steps .card { position: relative; }
.steps .card::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  background: var(--color-accent); color: #fff; font-weight: 800; margin-bottom: .8rem;
}

/* ---------- CTA 區 ---------- */
.cta-band { background: linear-gradient(120deg, var(--color-primary), var(--color-accent)); color: #fff; text-align: center; border-radius: var(--radius); padding: clamp(2.2rem, 5vw, 3.5rem); }
.cta-band h2 { color: #fff; font-size: var(--fs-h2); }
.cta-band p { color: rgba(255,255,255,.92); margin: .8rem auto 1.6rem; max-width: 55ch; }
.cta-band .hero-cta { justify-content: center; }

/* ---------- 表單 ---------- */
.form-card { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); padding: clamp(1.6rem, 4vw, 2.4rem); box-shadow: var(--shadow-sm); }
.field { display: grid; gap: .4rem; margin-bottom: 1.1rem; }
.field label { font-weight: 600; color: var(--color-ink); }
.field input, .field textarea, .field select {
  font: inherit; padding: .75em .9em; border: 1px solid var(--color-line); border-radius: var(--radius-sm);
  background: var(--color-bg); color: var(--color-ink); width: 100%;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: 2px solid var(--color-primary); border-color: transparent; }

/* ---------- FAQ ---------- */
.faq details { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-sm); padding: 1rem 1.2rem; margin-bottom: .8rem; }
.faq summary { font-weight: 700; cursor: pointer; color: var(--color-ink); list-style: none; }
.faq summary::after { content: "+"; float: right; color: var(--color-primary); font-weight: 800; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: .7rem; color: var(--color-muted); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-ink); color: #c7d6d4; padding-block: clamp(2.5rem, 5vw, 3.5rem) 1.5rem; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(2, 1fr); gap: 2rem; }
.site-footer h4 { color: #fff; margin-bottom: .9rem; font-size: 1rem; }
.site-footer a { color: #c7d6d4; }
.site-footer a:hover { color: #fff; }
.footer-links { list-style: none; display: grid; gap: .5rem; }
.footer-brand .brand { color: #fff; margin-bottom: .8rem; }
.footer-brand p { color: #9fb2b0; max-width: 34ch; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 2rem; padding-top: 1.3rem; text-align: center; color: #8ba09e; font-size: .9rem; }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; gap: 1.6rem; } }

/* 讓 footer 貼底 */
body { display: flex; flex-direction: column; min-height: 100vh; }
main { flex: 1; }