:root {
    --bg: #f5f0e8;
    --surface: #fffdf9;
    --surface-alt: #efe4d1;
    --ink: #1f2933;
    --muted: #52606d;
    --brand: #8b5e34;
    --brand-dark: #5a3d24;
    --accent: #2e5e4e;
    --danger: #a12d2f;
    --border: #d8cab7;
    --shadow: 0 18px 45px rgba(53, 38, 22, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Noto Sans TC", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at top right, rgba(139, 94, 52, 0.15), transparent 28%),
        linear-gradient(180deg, #f7f1e8 0%, #f0e6d7 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
}

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(14px);
    background: rgba(245, 240, 232, 0.88);
    border-bottom: 1px solid rgba(216, 202, 183, 0.8);
}

.nav-bar,
.admin-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 0;
}

.brand-title {
    font-family: "Noto Serif TC", serif;
    font-size: 1.45rem;
    font-weight: 700;
}

.brand-block,
.brand-link {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-link {
    min-width: 0;
}

.brand-logo {
    display: block;
    width: 72px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(31, 41, 51, 0.18);
}

.brand-logo.hero-logo {
    width: min(100%, 520px);
    border-radius: 18px;
}

.brand-logo.admin-logo {
    width: min(100%, 320px);
    margin-bottom: 12px;
}

.brand-subtitle {
    font-size: 0.88rem;
    color: var(--muted);
}

.nav-links {
    display: flex;
    gap: 18px;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a,
.button,
button {
    transition: 0.2s ease;
}

.button,
button {
    border: none;
    border-radius: 999px;
    padding: 12px 22px;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.button.secondary,
.ghost-button {
    background: transparent;
    color: var(--brand-dark);
    border: 1px solid var(--border);
    box-shadow: none;
}

.hero {
    padding: 92px 0 68px;
}

.hero-grid {
    display: grid;
    gap: 28px;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
}

.hero h1,
.section-title {
    margin: 0 0 16px;
    font-family: "Noto Serif TC", serif;
    line-height: 1.2;
}

.hero h1 {
    font-size: clamp(2.3rem, 5vw, 4.5rem);
}

.hero p {
    font-size: 1.06rem;
    color: var(--muted);
    line-height: 1.85;
}

.hero-card,
.card,
.chart-card,
.admin-shell,
.login-card {
    background: rgba(255, 253, 249, 0.9);
    border: 1px solid rgba(216, 202, 183, 0.95);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 28px;
}

.hero-stats {
    display: grid;
    gap: 16px;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--brand-dark);
}

.section {
    padding: 30px 0 60px;
}

.section-head {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-end;
    margin-bottom: 26px;
}

.grid-3,
.stats-grid,
.chart-grid {
    display: grid;
    gap: 20px;
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
    padding: 24px;
}

.card h3,
.card h4 {
    margin-top: 0;
}

.feature-list,
.timeline,
.contact-list,
.table-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li,
.contact-list li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(216, 202, 183, 0.9);
}

.timeline li {
    margin-bottom: 14px;
    padding-left: 16px;
    border-left: 3px solid var(--accent);
}

.contact-grid,
.message-grid,
.admin-grid {
    display: grid;
    gap: 20px;
}

.contact-grid {
    grid-template-columns: 0.9fr 1.1fr;
}

.message-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field.full {
    grid-column: 1 / -1;
}

label {
    font-weight: 700;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px 14px;
    background: #fff;
    font: inherit;
    color: var(--ink);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

.hint,
.muted {
    color: var(--muted);
    font-size: 0.92rem;
}

.alert {
    padding: 14px 18px;
    border-radius: 16px;
    margin-bottom: 18px;
}

.alert-success {
    background: rgba(46, 94, 78, 0.12);
    color: var(--accent);
}

.alert-error {
    background: rgba(161, 45, 47, 0.12);
    color: var(--danger);
}

.site-footer {
    border-top: 1px solid rgba(216, 202, 183, 0.9);
    padding: 28px 0 42px;
    color: var(--muted);
}

.admin-body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(46, 94, 78, 0.12), transparent 28%),
        linear-gradient(180deg, #f7f1e8 0%, #efe2cf 100%);
}

.admin-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 24px auto 32px;
    padding: 28px;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: min(440px, 100%);
    padding: 32px;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.stats-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: 20px;
}

.stat-card {
    padding: 20px;
    background: rgba(255, 255, 255, 0.72);
    border-radius: 20px;
    border: 1px solid var(--border);
}

.stat-card strong {
    display: block;
    font-size: 1.85rem;
    margin-top: 10px;
    color: var(--brand-dark);
}

.chart-grid {
    grid-template-columns: 1.2fr 0.8fr;
    margin-bottom: 20px;
}

.chart-card {
    padding: 20px;
}

.admin-grid {
    grid-template-columns: 1.1fr 0.9fr;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    text-align: left;
    padding: 12px 10px;
    border-bottom: 1px solid rgba(216, 202, 183, 0.9);
    vertical-align: top;
}

th {
    font-size: 0.92rem;
    color: var(--muted);
}

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.82rem;
    font-weight: 700;
}

.badge-new {
    background: rgba(161, 45, 47, 0.12);
    color: var(--danger);
}

.badge-read {
    background: rgba(46, 94, 78, 0.12);
    color: var(--accent);
}

.table-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button:hover,
.button:hover,
.nav-links a:hover {
    transform: translateY(-1px);
    opacity: 0.94;
}

@media (max-width: 920px) {
    .hero-grid,
    .contact-grid,
    .chart-grid,
    .admin-grid,
    .grid-3,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .message-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-bar,
    .admin-topbar,
    .section-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .brand-block,
    .brand-link {
        align-items: flex-start;
    }

    .hero {
        padding-top: 60px;
    }

    .admin-shell {
        padding: 20px;
    }
}