/* ==========================================================================
   MedCalc 台灣官方網站 - 公共樣式 common.css
   主題色: #0462CE  | 淺色主題 | 現代 / 簡潔 / 專業
   ========================================================================== */

/* ----- 設計變數 ----- */
:root {
  --brand: #0462CE;
  --brand-dark: #034a9c;
  --brand-light: #e8f1fc;
  --brand-soft: #f4f8fe;
  --ink: #16202e;
  --ink-soft: #4a5868;
  --ink-mute: #7a8696;
  --line: #e4ebf3;
  --bg: #ffffff;
  --bg-alt: #f6f9fd;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(16, 36, 64, .06);
  --shadow: 0 12px 34px rgba(16, 56, 110, .10);
  --shadow-lg: 0 28px 60px rgba(8, 50, 110, .16);
  --maxw: 1200px;
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

/* ----- 基礎重置 ----- */
* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-dark); }

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

ul { list-style: none; }

/* ----- 通用佈局容器 ----- */
.cmn-container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.cmn-section { padding: 96px 0; }
.cmn-section--alt { background: var(--bg-alt); }

/* ----- 通用區塊標題 ----- */
.cmn-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}

.cmn-title {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.cmn-lead {
  margin-top: 16px;
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 720px;
}

.cmn-center { text-align: center; }
.cmn-center .cmn-lead { margin-left: auto; margin-right: auto; }

/* ----- 通用按鈕 ----- */
.cmn-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.cmn-btn svg { width: 18px; height: 18px; flex: none; }

.cmn-btn--primary {
  background: var(--brand);
  color: var(--white);
  box-shadow: 0 10px 24px rgba(4, 98, 206, .28);
}
.cmn-btn--primary:hover {
  background: var(--brand-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(4, 98, 206, .34);
}

.cmn-btn--ghost {
  background: var(--white);
  color: var(--brand);
  border-color: var(--line);
}
.cmn-btn--ghost:hover {
  border-color: var(--brand);
  color: var(--brand-dark);
  background: var(--brand-soft);
}

/* ----- 內頁通用橫幅 page-hero ----- */
.page-hero {
  position: relative;
  overflow: hidden;
  margin-top: -98px;
  padding: 168px 0 64px;
  background: linear-gradient(180deg, var(--brand-soft) 0%, #ffffff 78%);
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: -180px; left: 50%;
  transform: translateX(-50%);
  width: 760px; height: 520px;
  background: radial-gradient(ellipse at center, rgba(4,98,206,.14), transparent 64%);
  pointer-events: none;
}
.page-hero-inner { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
.page-crumb {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--ink-mute);
  margin-bottom: 16px;
}
.page-crumb a { color: var(--ink-mute); }
.page-crumb a:hover { color: var(--brand); }
.page-crumb span { color: var(--brand); }
.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.22; font-weight: 800;
  letter-spacing: -0.02em; color: var(--ink);
}
.page-hero h1 em { font-style: normal; background: linear-gradient(120deg, var(--brand), #3b8ef0); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-hero p { margin: 18px auto 0; font-size: 17px; line-height: 1.8; color: var(--ink-soft); max-width: 660px; }

/* 工具類 */
.cmn-sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

@media (max-width: 768px) {
  .cmn-section { padding: 64px 0; }
  .cmn-container { padding: 0 18px; }
  .page-hero { padding: 140px 0 52px; }
}