/* ============================================================
   Epic Pen 粵語官網 - 全局通用樣式 common.css
   編碼: UTF-8
   主題色: #33AFE1
   ============================================================ */

/* ---------- CSS 變量 ---------- */
:root {
    --color-primary: #33AFE1;
    --color-primary-dark: #1F8FBF;
    --color-primary-light: #5BC2E7;
    --color-primary-soft: #E6F6FC;
    --color-accent: #FF6B6B;
    --color-text: #1A2733;
    --color-text-secondary: #5A6B7B;
    --color-text-muted: #8A99A8;
    --color-bg: #FFFFFF;
    --color-bg-soft: #F7FAFC;
    --color-bg-gradient: linear-gradient(135deg, #E6F6FC 0%, #F7FAFC 50%, #FFFFFF 100%);
    --color-border: #E5EDF3;
    --color-shadow: rgba(51, 175, 225, 0.12);
    --color-shadow-strong: rgba(51, 175, 225, 0.25);

    --font-cn: "PingFang SC", "Microsoft YaHei", "微軟雅黑", "Hiragino Sans GB", "Source Han Sans CN", sans-serif;
    --font-en: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-base: var(--font-en), var(--font-cn);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(26, 39, 51, 0.06);
    --shadow-md: 0 8px 24px rgba(26, 39, 51, 0.08);
    --shadow-lg: 0 16px 48px rgba(26, 39, 51, 0.12);
    --shadow-primary: 0 10px 30px rgba(51, 175, 225, 0.35);

    --container-max: 1200px;
    --header-height: 72px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 重置 ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0.01em;
}

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

/* ---------- 通用按鈕 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    border: 1.5px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 36px rgba(51, 175, 225, 0.45);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-ghost:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn svg {
    width: 16px;
    height: 16px;
}

/* ---------- 中英文混排：自動在中英文之間添加空隙 ---------- */
/* 全局基礎已含 letter-spacing；正文段落建議使用 .cn-en 優化 */
.cn-en {
    word-spacing: 0.05em;
}

/* ---------- 工具類 ---------- */
.text-center { text-align: center; }
.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ---------- 滾動條美化 ---------- */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-soft);
}
::-webkit-scrollbar-thumb {
    background: var(--color-primary-light);
    border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ---------- 選中文字顏色 ---------- */
::selection {
    background: var(--color-primary);
    color: #fff;
}

/* ---------- 響應式 ---------- */
@media (max-width: 768px) {
    body { font-size: 15px; }
    .container { padding: 0 18px; }
}