@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Noto+Sans+TC:wght@400;500;600;700&display=swap");

:root {
    --primary: #4fa8db;
    --primary-hover: #3694c9;
    --primary-dark: #1f6b96;
    --primary-light: #edf7fc;
    --primary-soft: #f4fafe;
    --primary-border: #d2eaf8;
    
    --text-title: #0f273d;
    --text-body: #384e66;
    --text-muted: #647b93;
    --text-light: #94a7bc;
    
    --bg-body: #ffffff;
    --bg-soft: #f7fafd;
    --bg-card: #ffffff;
    
    --border-color: #e1edf6;
    --border-subtle: #eef5fa;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-pill: 999px;
    
    --shadow-sm: 0 2px 8px rgba(15, 39, 61, 0.04);
    --shadow-md: 0 8px 24px rgba(15, 39, 61, 0.06);
    
    --font: "Plus Jakarta Sans", "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

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

a { 
    color: var(--primary-dark); 
    text-decoration: none; 
    transition: all 0.2s ease; 
}

a:hover { 
    color: var(--primary-hover); 
    text-decoration: underline; 
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.topbar { display: none; }

.container { 
    max-width: 1100px; 
    margin: 0 auto; 
    padding: 32px 24px 80px; 
}

/* 頂部 Hero Banner */
.hero {
    background: linear-gradient(135deg, #0e273f 0%, #173f63 100%);
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 44px 36px;
    margin-bottom: 36px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    top: -80px;
    right: -80px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(79, 168, 219, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #d8edf8;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero h1 {
    font-size: clamp(24px, 3.5vw, 34px);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 14px;
    color: #ffffff;
}

.hero .subtitle {
    font-size: 16px;
    line-height: 1.7;
    color: #cde4f5;
    max-width: 900px;
    margin-bottom: 24px;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.metric-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
}

.metric-num {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
}

.metric-label {
    font-size: 12.5px;
    color: #a4c7e4;
    margin-top: 2px;
}

/* 目錄 Bar */
.toc-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 28px 0 40px;
    padding: 14px 18px;
    background: var(--bg-soft);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.toc-btn {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-body);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    background: #ffffff;
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    transition: all 0.2s ease;
}

.toc-btn:hover {
    background: var(--primary);
    color: #ffffff !important;
    border-color: var(--primary);
    text-decoration: none;
}

/* 正文章節排版 */
section {
    margin-bottom: 48px;
    scroll-margin-top: 70px;
}

.section-badge {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--primary-dark);
    margin-bottom: 8px;
    display: inline-block;
    background: var(--primary-light);
    border: 1px solid var(--primary-border);
    padding: 2px 10px;
    border-radius: var(--radius-pill);
}

h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 12px;
}

h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-title);
    margin: 24px 0 10px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 900px;
    margin-bottom: 20px;
}

/* 卡片與網格 */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-border);
}

.card h3 {
    margin-top: 0;
    font-size: 17px;
}

.card p {
    font-size: 14.5px;
    color: var(--text-body);
    line-height: 1.6;
}

/* 提示框 (Notice / Callout) */
.note-box, .callout {
    background: var(--primary-soft);
    border: 1px solid var(--primary-border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin: 20px 0;
    font-size: 14.5px;
    color: var(--text-body);
}

/* 表格排版 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: var(--bg-soft);
    font-weight: 700;
    color: var(--text-title);
}

tr:last-child td {
    border-bottom: 0;
}

/* 底部導覽按鈕 */
.article-footer-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

/* SRP CORE 專屬標章展示 */
.hero-core-brand-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.hero-core-logo-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 18px 8px 10px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border: 1px solid rgba(56, 189, 248, 0.4);
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.2), 0 0 14px rgba(56, 189, 248, 0.25);
}

.hero-core-logo-badge img {
    width: 42px;
    height: auto;
    border-radius: 8px;
    filter: drop-shadow(0 0 8px rgba(168, 85, 247, 0.6));
}

.hero-core-badge-text {
    display: flex;
    flex-direction: column;
}

.hero-core-badge-text strong {
    font-size: 14.5px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 0.04em;
    line-height: 1.2;
}

.hero-core-badge-text span {
    font-size: 11.5px;
    font-weight: 600;
    color: #38bdf8;
    line-height: 1.2;
}

/* 響應式 */
@media (max-width: 768px) {
    .container { padding: 20px 16px 60px; }
    .hero { padding: 32px 20px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}