/* ============================================================
 * 玉京山 - 现代国风高级暗色版
 * 深墨黑 / 深炭灰 / 金色点缀 / 极简克制
 * ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@300;400;500;600;700;900&family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

:root {
    --bg-body: #0a0a0a;
    --bg-card: #141414;
    --bg-elevated: #1a1a1a;
    --bg-hover: #1f1f1f;
    --gold: #c8a45c;
    --gold-deep: #a07830;
    --gold-light: #e8d5a0;
    --gold-dim: rgba(200,164,92,0.12);
    --text-primary: #e8e8e8;
    --text-secondary: #888888;
    --text-muted: #555555;
    --text-inverse: #0a0a0a;
    --border: #222222;
    --border-light: #2a2a2a;
    --font-serif: "Noto Serif TC", "Source Han Serif TC", "SimSun", serif;
    --font-sans: "Noto Sans TC", "Microsoft YaHei", sans-serif;
    --radius: 2px;
    --radius-sm: 1px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============ Reset ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-body);
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23222' fill-opacity='0.12'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    line-height: 1.7;
    font-size: 15px;
    overflow-x: hidden;
}
a { color: var(--gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: var(--font-sans); font-size: inherit; color: var(--text-primary); }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-serif); font-weight: 600; line-height: 1.4; color: var(--text-primary); }

/* ============ Container ============ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 860px; margin: 0 auto; padding: 0 24px; }
.container-lg { max-width: 1400px; margin: 0 auto; padding: 0 24px; }

/* ============ Header ============ */
.site-header {
    background: var(--bg-body);
    border-bottom: 1px solid var(--border);
    padding: 28px 0;
    position: relative;
}
.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.site-header-inner .logo-block {
    text-align: left;
    flex: 0 0 auto;
}
.site-header-inner .logo-img {
    height: 48px;
    width: auto;
    display: block;
    filter: brightness(0.95);
}
.site-header-inner .logo-text {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 8px;
    line-height: 1.2;
}
.site-header-inner .slogan-text {
    font-family: var(--font-serif);
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 4px;
    margin-top: 6px;
}
.site-header-inner .lang-switch {
    display: flex;
    gap: 8px;
    align-items: center;
}
.site-header-inner .lang-switch a {
    padding: 5px 14px;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 12px;
    font-family: var(--font-sans);
    letter-spacing: 1px;
    transition: var(--transition);
}
.site-header-inner .lang-switch a.active,
.site-header-inner .lang-switch a:hover {
    background: var(--gold-dim);
    color: var(--gold);
    border-color: var(--gold);
}

/* ============ Navigation ============ */
.main-nav {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.main-nav .nav-list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}
.main-nav .nav-item {
    position: relative;
}
.main-nav .nav-link {
    display: block;
    padding: 16px 22px;
    color: var(--text-secondary);
    font-size: 13px;
    font-family: var(--font-serif);
    letter-spacing: 2px;
    transition: var(--transition);
    position: relative;
}
.main-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}
.main-nav .nav-link:hover,
.main-nav .nav-link.active {
    color: var(--text-primary);
    background: transparent;
}
.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
    width: 24px;
}
.main-nav .nav-dropdown {
    position: absolute;
    top: 100%; left: 0;
    background: var(--bg-elevated);
    min-width: 180px;
    border: 1px solid var(--border);
    border-top: 2px solid var(--gold);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
}
.main-nav .nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.main-nav .nav-dropdown .nav-link {
    padding: 12px 22px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
    letter-spacing: 2px;
}
.main-nav .nav-dropdown .nav-link:last-child { border-bottom: none; }

/* ============ Main Content ============ */
.main-content { min-height: 60vh; padding: 48px 0; }

/* ============ Hero Banner ============ */
.hero-banner {
    position: relative;
    overflow: hidden;
    background: var(--bg-body);
}
.hero-banner .banner-slides { position: relative; height: 560px; }
.hero-banner .banner-slide {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-banner .banner-slide.active { opacity: 1; z-index: 1; }
.hero-banner .banner-slide::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(10,10,10,0.5) 0%, rgba(10,10,10,0.85) 100%);
}
.hero-banner .banner-content {
    position: relative; z-index: 1;
    text-align: center;
    padding: 0 24px;
    max-width: 720px;
}
.hero-banner .banner-title {
    font-family: var(--font-serif);
    font-size: 52px;
    font-weight: 700;
    letter-spacing: 10px;
    margin-bottom: 20px;
    color: var(--gold);
    text-shadow: 0 2px 20px rgba(0,0,0,0.6);
}
.hero-banner .banner-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.9;
    letter-spacing: 2px;
}
.hero-banner .banner-cta {
    display: inline-block;
    padding: 14px 48px;
    background: transparent;
    color: var(--gold);
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: 4px;
    border: 1px solid var(--gold);
    transition: var(--transition);
    font-size: 15px;
}
.hero-banner .banner-cta:hover {
    background: var(--gold);
    color: var(--text-inverse);
    border-color: var(--gold);
}
.banner-nav {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    z-index: 2;
}
.banner-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}
.banner-dot.active {
    background: var(--gold);
    box-shadow: 0 0 10px rgba(200,164,92,0.4);
}
.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 2;
    border: 1px solid var(--border);
}
.banner-arrow:hover {
    background: rgba(255,255,255,0.1);
    color: var(--gold);
    border-color: var(--gold);
}
.banner-arrow.prev { left: 32px; }
.banner-arrow.next { right: 32px; }

/* Page Banner (fallback) */
.page-banner {
    height: 220px;
    background: var(--bg-card);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-align: center;
    border-bottom: 1px solid var(--border);
}
.page-banner::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(200,164,92,0.04) 0%, transparent 50%);
}
.page-banner h1 {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 10px;
    position: relative;
    z-index: 1;
}

/* ============ Section ============ */
.section { margin-bottom: 80px; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-title {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 6px;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 1px;
    background: var(--gold);
    margin: 16px auto 0;
}
.section-subtitle {
    font-family: var(--font-sans);
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 5px;
    text-transform: uppercase;
}

/* ============ Cards ============ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-2px);
    border-color: var(--border-light);
}
.card-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-elevated);
}
.card-cover img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.card:hover .card-cover img { transform: scale(1.04); }
.card-cover-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-family: var(--font-serif);
    font-size: 48px; font-weight: 300;
}
.card-body { padding: 24px; }
.card-title {
    font-family: var(--font-serif);
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card:hover .card-title { color: var(--gold); }
.card-summary {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.7;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 16px;
}
.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 12px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

/* ============ Article Grid ============ */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 32px;
}

/* ============ Expert Card ============ */
.expert-card {
    text-align: center;
    background: var(--bg-card);
    padding: 40px 28px;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.expert-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-light);
}
.expert-avatar {
    width: 96px; height: 96px;
    border-radius: 50%;
    margin: 0 auto 18px;
    border: 1px solid var(--border);
    overflow: hidden;
    background: var(--bg-elevated);
    display: flex; align-items: center; justify-content: center;
    color: var(--gold);
    font-family: var(--font-serif); font-size: 36px;
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-name {
    font-family: var(--font-serif);
    font-size: 18px; font-weight: 600;
    color: var(--text-primary); margin-bottom: 4px;
    letter-spacing: 2px;
}
.expert-title {
    color: var(--gold);
    font-size: 12px; letter-spacing: 2px;
    margin-bottom: 14px;
}
.expert-intro {
    color: var(--text-secondary);
    font-size: 13px; line-height: 1.7;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

/* ============ Category Card ============ */
.cat-card {
    text-align: center;
    display: block;
    padding: 32px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: var(--transition);
    text-decoration: none;
}
.cat-card:hover {
    border-color: var(--gold);
    background: var(--bg-hover);
}
.cat-icon {
    width: 64px; height: 64px;
    margin: 0 auto 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-serif); font-size: 24px;
    color: var(--gold); transition: var(--transition);
}
.cat-card:hover .cat-icon {
    border-color: var(--gold);
    background: var(--gold-dim);
}
.cat-name {
    font-family: var(--font-serif);
    font-size: 15px; color: var(--text-primary);
    letter-spacing: 2px; font-weight: 600; margin-bottom: 4px;
}
.cat-count {
    font-size: 12px; color: var(--text-muted);
    font-family: var(--font-sans); letter-spacing: 1px;
}

/* ============ Article Detail ============ */
.article-detail {
    background: var(--bg-card);
    padding: 56px 64px;
    border: 1px solid var(--border);
}
.article-detail h1 {
    font-family: var(--font-serif);
    font-size: 32px; font-weight: 700;
    color: var(--text-primary); text-align: center;
    margin-bottom: 20px; letter-spacing: 4px;
}
.article-meta {
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 36px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border);
}
.article-meta span { margin: 0 14px; }
.article-content {
    font-family: var(--font-serif);
    font-size: 16px; line-height: 2.2;
    color: var(--text-secondary);
}
.article-content p { margin-bottom: 24px; text-indent: 2em; }
.article-content h2 {
    font-family: var(--font-serif);
    font-size: 22px; font-weight: 600;
    color: var(--text-primary); margin: 40px 0 20px;
    padding-left: 16px;
    border-left: 2px solid var(--gold);
}
.article-content h3 {
    font-family: var(--font-serif);
    font-size: 18px; font-weight: 600;
    color: var(--text-primary); margin: 28px 0 12px;
}
.article-content img { max-width: 100%; margin: 24px 0; }
.article-content blockquote {
    background: var(--bg-elevated);
    padding: 24px 32px; margin: 24px 0;
    border-left: 2px solid var(--gold);
    color: var(--text-secondary); font-style: italic;
    font-family: var(--font-serif);
}

/* ============ Forms ============ */
.form-group { margin-bottom: 24px; }
.form-label {
    display: block; color: var(--text-secondary);
    margin-bottom: 8px; font-size: 14px; font-weight: 500;
    letter-spacing: 1px;
}
.form-control {
    width: 100%; padding: 12px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    font-size: 14px;
    transition: var(--transition);
    color: var(--text-primary);
}
.form-control:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 2px rgba(200,164,92,0.08);
}
.form-control::placeholder { color: var(--text-muted); }
textarea.form-control { resize: vertical; min-height: 120px; }
.form-row { display: flex; gap: 20px; }
.form-row > .form-group { flex: 1; }

/* ============ Buttons ============ */
.btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--gold);
    color: var(--text-inverse);
    border: none;
    font-family: var(--font-serif);
    font-size: 14px; font-weight: 500;
    cursor: pointer; transition: var(--transition);
    text-align: center; letter-spacing: 3px;
}
.btn:hover {
    background: var(--gold-light);
    transform: translateY(-1px);
}
.btn-primary { background: var(--gold); }
.btn-primary:hover { background: var(--gold-light); }
.btn-outline {
    background: transparent;
    border: 1px solid var(--gold);
    color: var(--gold);
}
.btn-outline:hover { background: var(--gold); color: var(--text-inverse); }
.btn-sm { padding: 7px 18px; font-size: 12px; letter-spacing: 1px; }
.btn-lg { padding: 16px 44px; font-size: 16px; letter-spacing: 4px; }
.btn-gold {
    background: var(--gold);
    color: var(--text-inverse);
    border: 1px solid var(--gold);
}
.btn-gold:hover { background: var(--gold-light); }

/* ============ Alerts ============ */
.alert {
    padding: 16px 24px;
    margin-bottom: 24px;
    font-size: 14px;
    border-left: 2px solid;
    background: var(--bg-card);
}
.alert-success { border-color: #4ade80; color: #86efac; }
.alert-error { border-color: #f87171; color: #fca5a5; }
.alert-info { border-color: #60a5fa; color: #93c5fd; }

/* ============ Pagination ============ */
.pagination {
    display: flex; justify-content: center; align-items: center;
    gap: 8px; margin: 48px 0; flex-wrap: wrap;
}
.pagination .page-link {
    display: inline-block; min-width: 40px; height: 40px;
    line-height: 38px; text-align: center; padding: 0 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 13px; font-family: var(--font-serif);
    transition: var(--transition);
}
.pagination .page-link:hover,
.pagination .page-link.active {
    background: var(--gold);
    color: var(--text-inverse);
    border-color: var(--gold);
}

/* ============ Sidebar ============ */
.sidebar {
    display: grid; grid-template-columns: 1fr 300px;
    gap: 40px; align-items: start;
}
.sidebar .main-col { min-width: 0; }
.sidebar .side-col { position: sticky; top: 80px; }
.widget {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 20px;
}
.widget-title {
    font-family: var(--font-serif);
    font-size: 15px; font-weight: 600;
    color: var(--text-primary); margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    letter-spacing: 2px;
}
.widget-list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.widget-list li:last-child { border: 0; }
.widget-list a { color: var(--text-secondary); display: block; transition: var(--transition); font-size: 14px; }
.widget-list a:hover { color: var(--gold); padding-left: 6px; }

/* ============ Footer ============ */
.site-footer {
    background: var(--bg-card);
    color: var(--text-muted);
    padding: 60px 0 28px;
    margin-top: 80px;
    border-top: 1px solid var(--border);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 36px;
}
.footer-brand h3 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    font-size: 22px; font-weight: 700;
    margin-bottom: 14px; letter-spacing: 4px;
}
.footer-brand p { font-size: 13px; line-height: 1.9; margin-bottom: 10px; color: var(--text-secondary); }
.footer-col h4 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    font-size: 14px; font-weight: 600;
    margin-bottom: 16px; letter-spacing: 2px;
}
.footer-col ul li { margin-bottom: 10px; font-size: 13px; }
.footer-col ul li a { color: var(--text-muted); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--gold); padding-left: 4px; }
.footer-bottom {
    text-align: center; padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 12px; color: var(--text-muted);
    letter-spacing: 1px;
}

/* ============ Chat Widget ============ */
.chat-widget { position: fixed; bottom: 32px; right: 32px; z-index: 1000; }
.chat-toggle {
    width: 56px; height: 56px;
    background: var(--gold);
    border-radius: 50%; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
    border: none;
    box-shadow: 0 4px 20px rgba(200,164,92,0.25);
}
.chat-toggle:hover { transform: scale(1.05); background: var(--gold-light); }
.chat-toggle svg { width: 24px; height: 24px; fill: var(--text-inverse); }
.chat-toggle .badge {
    position: absolute; top: -4px; right: -4px;
    background: #f87171; color: #fff;
    font-size: 11px; padding: 2px 6px; border-radius: 10px;
    font-weight: bold; min-width: 18px; text-align: center; display: none;
}
.chat-toggle .badge.show { display: block; }
.chat-window {
    position: absolute; bottom: 72px; right: 0;
    width: 360px; height: 520px;
    background: var(--bg-card);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
    border: 1px solid var(--border);
    display: none; flex-direction: column;
    animation: chatOpen 0.3s ease-out;
}
.chat-window.open { display: flex; }
.chat-header {
    background: var(--bg-elevated);
    color: var(--text-primary); padding: 16px 20px;
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid var(--border);
}
.chat-header .title { font-family: var(--font-serif); font-size: 15px; font-weight: 600; letter-spacing: 2px; }
.chat-header .status { font-size: 11px; color: var(--text-muted); }
.chat-header .status::before { content: '●'; margin-right: 4px; color: #4ade80; }
.chat-close { cursor: pointer; font-size: 20px; line-height: 1; color: var(--text-muted); transition: var(--transition); }
.chat-close:hover { color: var(--text-primary); }
.chat-body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-body);
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23222' fill-opacity='0.12'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    line-height: 1.7;
    font-size: 15px;
    overflow-x: hidden;
}
.chat-message { margin-bottom: 16px; display: flex; flex-direction: column; }
.chat-message.guest { align-items: flex-end; }
.chat-message.admin, .chat-message.system { align-items: flex-start; }
.chat-bubble { max-width: 78%; padding: 12px 16px; font-size: 13px; line-height: 1.6; word-wrap: break-word; }
.chat-message.guest .chat-bubble { background: var(--gold); color: var(--text-inverse); border-bottom-right-radius: 2px; }
.chat-message.admin .chat-bubble { background: var(--bg-elevated); color: var(--text-primary); border: 1px solid var(--border); border-bottom-left-radius: 2px; }
.chat-message.system .chat-bubble { background: var(--bg-elevated); color: var(--text-muted); font-size: 12px; }
.chat-time { font-size: 10px; color: var(--text-muted); margin-top: 4px; padding: 0 4px; }
.chat-form-info { padding: 16px 20px; background: var(--bg-body); border-bottom: 1px solid var(--border); }
.chat-form-info input {
    width: 100%; padding: 10px 14px;
    background: var(--bg-elevated); border: 1px solid var(--border);
    margin-bottom: 10px; font-size: 13px; color: var(--text-primary);
}
.chat-form-info input:focus { outline: none; border-color: var(--gold); }
.chat-form-info input:last-child { margin-bottom: 0; }
.chat-input-area {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex; gap: 10px;
    background: var(--bg-card);
}
.chat-input-area input {
    flex: 1; padding: 10px 14px;
    background: var(--bg-elevated); border: 1px solid var(--border);
    font-size: 13px; color: var(--text-primary);
}
.chat-input-area input:focus { outline: none; border-color: var(--gold); }
.chat-input-area button {
    padding: 0 20px;
    background: var(--gold); color: var(--text-inverse);
    border: none; cursor: pointer;
    font-size: 13px; transition: var(--transition);
    font-family: var(--font-sans);
}
.chat-input-area button:hover { background: var(--gold-light); }

/* ============ Animations ============ */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes chatOpen { from { opacity: 0; transform: scale(0.95) translateY(10px); } to { opacity: 1; transform: scale(1) translateY(0); } }

/* ============ Decorative Utilities ============ */
.gold-line {
    width: 40px; height: 1px; background: var(--gold); margin: 16px auto;
}

/* ============ Responsive ============ */
@media (max-width: 768px) {
    .container, .container-sm, .container-lg { padding: 0 16px; }
    .main-nav .nav-list { flex-wrap: wrap; }
    .main-nav .nav-link { padding: 12px 16px; font-size: 13px; letter-spacing: 1px; }
    .hero-banner .banner-slides { height: 380px; }
    .hero-banner .banner-title { font-size: 28px; letter-spacing: 4px; }
    .article-grid { grid-template-columns: 1fr; }
    .article-detail { padding: 32px 20px; }
    .article-detail h1 { font-size: 24px; }
    .article-detail .article-content { font-size: 15px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .sidebar { grid-template-columns: 1fr; }
    .sidebar .side-col { position: static; }
    .chat-window { width: calc(100vw - 40px); right: -10px; }
    .site-header-inner { flex-direction: column; gap: 12px; }
    .site-header-inner .logo-block { text-align: center; }
    .section-title { font-size: 24px; }
    .page-banner h1 { font-size: 24px; }
    .banner-arrow { display: none; }
}

/* ============ Utilities ============ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 16px; }
.text-muted { color: var(--text-muted); }
.text-gold { color: var(--gold); }
.fz-sm { font-size: 12px; }
.fz-lg { font-size: 18px; }