/*
 * Art Deco 模板 - 装饰艺术奢华风
 *
 * 设计语言：
 * - 深午夜蓝底 + 金属金色点缀
 * - 几何图案装饰（菱形、三角、扇形）
 * - 窄身衬线字体（Didot/Bodoni/Cormorant）
 * - 对称构图 + 细金线边框
 * - 1920s Gatsby 奢华氛围
 */

:root {
    --midnight: #0c0e1a;
    --ink: #e8e6e0;
    --ink-soft: #9a9790;
    --ink-mute: #5a5650;
    --gold: var(--primary);
    --gold-dim: var(--primary-soft);
    --champagne: #f0e6c8;
    --card-bg: #141622;
    --card-border: rgba(201, 168, 76, 0.2);
    --display: 'Palatino', 'Didot', 'Bodoni MT', 'Georgia', 'KaiTi', 'STKaiti', serif;
    --sans: 'Helvetica Neue', 'Segoe UI', 'PingFang SC', sans-serif;
}

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

body {
    font-family: var(--display);
    background: linear-gradient(180deg, var(--midnight) 0%, #101226 40%, #0a0c16 100%);
    background-attachment: fixed;
    color: var(--ink);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 背景几何暗纹 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.03;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 40px,
            rgba(201, 168, 76, 0.4) 40px,
            rgba(201, 168, 76, 0.4) 42px
        ),
        repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 40px,
            rgba(201, 168, 76, 0.4) 40px,
            rgba(201, 168, 76, 0.4) 42px
        );
    z-index: 0;
}

/* ========== Top Rule (顶部金线) ========== */
.deco-toprule {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 8px 0;
    background: var(--midnight);
    position: relative;
    z-index: 10;
}
.deco-toprule span {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
    max-width: 300px;
}
.deco-diamond {
    color: var(--gold);
    font-size: 0.5em;
    text-shadow: 0 0 6px rgba(201, 168, 76, 0.5);
}

/* ========== Header ========== */
.deco-header {
    background: linear-gradient(180deg, rgba(12, 14, 26, 0.95), rgba(20, 22, 34, 0.95));
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}
.deco-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

/* Brand */
.deco-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}
.deco-brand-icon {
    font-size: 1.6em;
    filter: drop-shadow(0 0 4px rgba(201, 168, 76, 0.3));
}
.deco-brand-text {
    display: flex;
    flex-direction: column;
}
.deco-brand-name {
    font-family: var(--display);
    font-size: 1.4em;
    font-weight: 700;
    color: var(--champagne);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.deco-brand-line {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.55em;
    font-weight: 400;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}
.deco-brand-line i {
    flex: 1;
    height: 1px;
    background: var(--gold-dim);
    min-width: 20px;
}

/* Navigation */
.deco-nav { display: flex; gap: 4px; }
.deco-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 20px;
    text-decoration: none;
    color: var(--ink-soft);
    font-family: var(--display);
    font-size: 0.82em;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid transparent;
    transition: all 0.3s;
    position: relative;
}
.deco-nav-num {
    font-family: var(--sans);
    font-size: 0.55em;
    font-weight: 300;
    color: var(--gold-dim);
    letter-spacing: 0.2em;
    margin-bottom: 2px;
}
.deco-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: width 0.3s ease;
}
.deco-nav a:hover {
    color: var(--champagne);
    border-color: var(--card-border);
}
.deco-nav a:hover::after { width: 60%; }
.deco-nav a.active {
    color: var(--champagne);
    border-color: var(--gold-dim);
}
.deco-nav a.active::after {
    width: 70%;
    background: var(--gold);
}

/* ========== Main ========== */
.deco-main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 48px;
    width: 100%;
    position: relative;
    z-index: 1;
}

/* ========== Converter (金色边框) ========== */
.converter-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 32px 28px;
    margin-bottom: 28px;
    position: relative;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}
/* 四角金色菱形装饰 */
.converter-box::before,
.converter-box::after,
.converter-box .converter-title::before,
.converter-box .converter-title::after {
    content: '◆';
    position: absolute;
    color: var(--gold);
    font-size: 0.35em;
    opacity: 0.6;
}
.converter-box::before { top: -4px; left: -4px; }
.converter-box::after { top: -4px; right: -4px; }
/* bottom corners via converter-box inner pseudo */

.converter-title {
    text-align: center;
    font-family: var(--display);
    font-size: 1.3em;
    font-weight: 600;
    color: var(--champagne);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}
.converter-title::before,
.converter-title::after {
    content: '■';
    font-size: 8px;
    color: var(--gold-dim);
    position: static;
}

.converter-row {
    display: flex;
    gap: 16px;
    align-items: flex-end;
    flex-wrap: wrap;
    justify-content: center;
}

.converter-field { flex: 1; min-width: 140px; }
.converter-field label {
    display: block;
    font-family: var(--display);
    font-size: 0.7em;
    font-weight: 400;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 6px;
}
.converter-field input,
.converter-field select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    color: var(--ink);
    font-family: var(--display);
    font-size: 1em;
    transition: border-color 0.3s;
}
.converter-field input:focus,
.converter-field select:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 1px rgba(201, 168, 76, 0.15);
}
.converter-field input {
    font-size: 1.3em;
    font-weight: 600;
    text-align: right;
}

.swap-btn {
    width: 48px;
    height: 48px;
    border: 1px solid var(--gold-dim);
    background: transparent;
    color: var(--gold);
    cursor: pointer;
    font-size: 1.2em;
    font-family: var(--display);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    flex-shrink: 0;
    margin-bottom: 2px;
}
.swap-btn:hover {
    background: rgba(201, 168, 76, 0.1);
    border-color: var(--gold);
    transform: rotate(180deg);
    box-shadow: 0 0 16px rgba(201, 168, 76, 0.15);
}

.rate-display {
    text-align: center;
    margin-top: 22px;
    padding: 18px 20px;
    background: rgba(201, 168, 76, 0.04);
    border: 1px solid rgba(201, 168, 76, 0.1);
}
.rate-display .rate-value {
    font-family: var(--display);
    font-size: 1.35em;
    font-weight: 600;
    color: var(--champagne);
}
.rate-display .rate-label {
    font-family: var(--display);
    font-size: 0.72em;
    color: var(--ink-mute);
    margin-top: 4px;
    letter-spacing: 0.06em;
}

.result-box {
    text-align: center;
    margin-top: 20px;
    padding: 22px 20px;
    background: linear-gradient(135deg, rgba(201, 168, 76, 0.08), rgba(201, 168, 76, 0.02));
    border: 1px solid var(--gold-dim);
    display: none;
    box-shadow: 0 0 20px rgba(201, 168, 76, 0.08);
}
.result-box.show { display: block; }
.result-box .result-value {
    font-family: var(--display);
    font-size: 1.9em;
    font-weight: 700;
    color: var(--champagne);
}
.result-box .result-detail {
    font-family: var(--display);
    font-size: 0.82em;
    color: var(--ink-mute);
    margin-top: 8px;
}

/* ========== Card (奢华卡片) ========== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 24px 28px;
    margin-bottom: 24px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}
.card-title {
    font-family: var(--display);
    font-size: 1.05em;
    font-weight: 600;
    color: var(--champagne);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    gap: 10px;
}
.card h1, .card h2 {
    font-family: var(--display);
    color: var(--champagne);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}
.card h1 { font-size: 1.5em; font-weight: 600; }
.card h2 { font-size: 1.2em; font-weight: 500; }
.card p { color: var(--ink-soft); line-height: 1.8; }

/* ========== Breadcrumb ========== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--display);
    font-size: 0.8em;
    color: var(--ink-mute);
    margin-bottom: 16px;
    letter-spacing: 0.04em;
}
.breadcrumb a {
    color: var(--gold);
    text-decoration: none;
    font-weight: 500;
}
.breadcrumb a:hover { color: var(--champagne); }

/* ========== Pairs Grid ========== */
.pairs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
}
.pair-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-decoration: none;
    color: var(--ink);
    transition: all 0.3s;
}
.pair-item:hover {
    background: rgba(201, 168, 76, 0.05);
    border-color: var(--gold-dim);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}
.pair-info { display: flex; flex-direction: column; gap: 2px; }
.pair-name {
    font-family: var(--display);
    font-weight: 600;
    font-size: 0.95em;
    color: var(--ink);
}
.pair-code {
    font-family: var(--sans);
    font-size: 0.7em;
    color: var(--gold-dim);
    letter-spacing: 0.08em;
}
.pair-rate {
    font-family: var(--display);
    font-weight: 700;
    font-size: 1.05em;
    color: var(--gold);
}
.pair-change { font-size: 0.78em; font-family: var(--display); }
.pair-change.up { color: var(--gold); }
.pair-change.down { color: #c96; }

/* ========== Search ========== */
.search-box { position: relative; margin-bottom: 20px; }
.search-box input {
    width: 100%;
    padding: 12px 16px 12px 42px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    color: var(--ink);
    font-family: var(--display);
    font-size: 0.95em;
    transition: border-color 0.3s;
}
.search-box input:focus {
    outline: none;
    border-color: var(--gold);
}
.search-box .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gold-dim);
}

/* ========== Pagination ========== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 28px;
}
.pagination a, .pagination span {
    padding: 8px 16px;
    border: 1px solid var(--card-border);
    text-decoration: none;
    color: var(--ink-soft);
    font-family: var(--display);
    font-size: 0.85em;
    transition: all 0.3s;
    background: transparent;
}
.pagination a:hover {
    border-color: var(--gold);
    color: var(--gold);
}
.pagination .current {
    background: var(--gold);
    color: var(--midnight);
    border-color: var(--gold);
    font-weight: 600;
}

/* ========== Deco Content (SEO) ========== */
.deco-content { margin-top: 40px; }
.deco-article {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(201, 168, 76, 0.08);
}
.deco-article:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}
.deco-art-num {
    font-family: var(--display);
    font-size: 2.2em;
    font-weight: 200;
    color: var(--gold-dim);
    line-height: 1;
    min-width: 50px;
    text-align: center;
    align-self: flex-start;
    padding-top: 4px;
    letter-spacing: 0.04em;
}
.deco-art-body { flex: 1; }
.deco-art-body h2 {
    font-family: var(--display);
    font-size: 1.2em;
    font-weight: 600;
    color: var(--champagne);
    margin-bottom: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.deco-art-body p {
    font-family: var(--display);
    color: var(--ink-soft);
    line-height: 2;
    font-size: 0.95em;
}

/* ========== Footer ========== */
.deco-footer {
    background: linear-gradient(0deg, var(--midnight), rgba(16, 18, 38, 0.98));
    border-top: 1px solid var(--card-border);
}
.deco-footer-ornament {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 16px 0 0;
}
.deco-footer-ornament span {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
    max-width: 120px;
}
.deco-footer-ornament i {
    color: var(--gold);
    font-size: 0.55em;
    text-shadow: 0 0 4px rgba(201, 168, 76, 0.3);
}
.deco-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 24px 28px;
    text-align: center;
}
.deco-footer-columns {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 32px;
    text-align: left;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(201, 168, 76, 0.08);
}
.deco-fcol-head {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--display);
    font-size: 0.78em;
    font-weight: 600;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 14px;
}
.deco-fcol-head i {
    height: 1px;
    background: var(--gold-dim);
    flex: 1;
    min-width: 16px;
}
.deco-fcol p {
    font-family: var(--display);
    font-size: 0.82em;
    color: var(--ink-mute);
    line-height: 1.7;
}
.deco-fcol a {
    display: block;
    font-family: var(--display);
    font-size: 0.82em;
    color: var(--ink-soft);
    text-decoration: none;
    margin-bottom: 6px;
    transition: color 0.2s;
}
.deco-fcol a:hover { color: var(--gold); }
.deco-footer-copy {
    font-family: var(--display);
    font-size: 0.75em;
    color: var(--ink-mute);
    margin-bottom: 8px;
    letter-spacing: 0.04em;
}
.deco-fsep { margin: 0 10px; color: var(--gold-dim); font-size: 0.5em; }
.deco-footer-motto {
    font-family: var(--display);
    font-size: 0.78em;
    font-weight: 600;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

/* ========== Tables ========== */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
}
th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
    font-family: var(--display);
    font-size: 0.9em;
}
th {
    background: rgba(201, 168, 76, 0.06);
    color: var(--gold);
    font-weight: 600;
    font-size: 0.75em;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--gold-dim);
}
tr:hover { background: rgba(201, 168, 76, 0.03); }

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: 10px 22px;
    border: 1px solid var(--gold-dim);
    background: transparent;
    color: var(--gold);
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    text-decoration: none;
    font-family: var(--display);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s;
}
.btn:hover {
    background: rgba(201, 168, 76, 0.1);
    border-color: var(--gold);
    color: var(--champagne);
}
.btn-primary {
    background: var(--gold);
    color: var(--midnight);
    border-color: var(--gold);
}
.btn-primary:hover {
    background: var(--champagne);
    color: var(--midnight);
}
.btn-success { color: #8a9; border-color: #8a9; }
.btn-success:hover { background: rgba(136, 170, 153, 0.1); }
.btn-danger { color: #c96; border-color: #c96; }
.btn-danger:hover { background: rgba(204, 153, 102, 0.1); }
.btn-outline { background: transparent; }
.btn-sm { padding: 6px 14px; font-size: 0.8em; }

/* ========== Badges ========== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 0.7em;
    font-weight: 500;
    letter-spacing: 0.06em;
    font-family: var(--display);
    text-transform: uppercase;
}
.badge-active {
    background: rgba(201, 168, 76, 0.1);
    color: var(--gold);
    border: 1px solid var(--gold-dim);
}
.badge-inactive {
    background: transparent;
    color: var(--ink-mute);
    border: 1px solid var(--ink-mute);
}

/* ========== Forms ========== */
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block;
    font-family: var(--display);
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--ink-soft);
    font-size: 0.82em;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    color: var(--ink);
    font-size: 0.95em;
    font-family: var(--display);
    transition: border-color 0.3s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--gold);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* ========== Alerts ========== */
.alert {
    padding: 14px 18px;
    border: 1px solid;
    margin-bottom: 16px;
    font-family: var(--display);
    font-size: 0.9em;
}
.alert-success {
    background: rgba(136, 170, 153, 0.06);
    color: #8a9;
    border-color: rgba(136, 170, 153, 0.2);
}
.alert-danger {
    background: rgba(204, 153, 102, 0.06);
    color: #c96;
    border-color: rgba(204, 153, 102, 0.2);
}
.alert-info {
    background: rgba(201, 168, 76, 0.04);
    color: var(--gold);
    border-color: rgba(201, 168, 76, 0.15);
}

/* ========== Tabs ========== */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--card-border);
}
.tabs a {
    padding: 10px 22px;
    text-decoration: none;
    color: var(--ink-mute);
    font-family: var(--display);
    font-size: 0.85em;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid transparent;
    margin-bottom: -1px;
    transition: all 0.3s;
}
.tabs a:hover { color: var(--ink-soft); }
.tabs a.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

/* ========== Spinner ========== */
.spinner {
    display: inline-block;
    width: 20px; height: 20px;
    border: 2px solid rgba(201, 168, 76, 0.15);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== Utils ========== */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.gap-8 { display: flex; gap: 8px; }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .deco-header-inner { flex-direction: column; gap: 12px; }
    .deco-brand-name { font-size: 1.2em; }
    .deco-nav { flex-wrap: wrap; justify-content: center; }
    .deco-nav a { padding: 6px 14px; font-size: 0.75em; }
    .converter-row { flex-direction: column; }
    .converter-field { min-width: 100%; }
    .deco-main { padding: 24px 16px 40px; }
    .converter-box { padding: 24px 18px; }
    .deco-footer-columns { grid-template-columns: 1fr; gap: 20px; }
    .deco-article { flex-direction: column; gap: 12px; }
    .deco-art-num { text-align: left; min-width: auto; font-size: 1.6em; }
    .pairs-grid { grid-template-columns: 1fr; }
}