/* ══════════════════════════════════════════════
   智燃氢电 · Design System — PPT Presentation Size
   Theme: 暗黑霓虹 (Dark Neon)
   ══════════════════════════════════════════════ */

:root {
    --bg-base: #080c18;
    --bg-card: rgba(12, 18, 36, 0.8);
    --bg-card-hover: rgba(16, 24, 48, 0.9);
    --bg-stats-well: rgba(10, 16, 32, 0.6);
    --bg-metric: rgba(8, 14, 28, 0.5);

    --accent: #f5f0e8;
    --accent-deep: #e8dcc8;
    --accent-green: #fff8ed;
    --accent-gradient: linear-gradient(135deg, #f5f0e8, #ffd700);
    --neon-glow: 0 0 10px rgba(255, 215, 0, 0.15), 0 0 20px rgba(255, 215, 0, 0.08);
    --neon-glow-strong: 0 0 10px rgba(255, 215, 0, 0.25), 0 0 30px rgba(255, 215, 0, 0.12), 0 0 60px rgba(255, 215, 0, 0.06);

    --text-heading: #e8f4f8;
    --text-body: #a0b4c0;
    --text-muted: #5a7080;
    --text-faint: #3a5060;
    --text-stat: #e8f4f8;

    --border: rgba(255, 215, 0, 0.12);
    --border-light: rgba(255, 215, 0, 0.06);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(255, 215, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5), 0 2px 12px rgba(255, 215, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6), 0 4px 20px rgba(255, 215, 0, 0.08);

    --status-online: #00ff88;
    --status-online-bg: rgba(0, 255, 136, 0.1);
    --status-online-border: rgba(0, 255, 136, 0.3);
    --status-alarm: #ffaa00;
    --status-alarm-bg: rgba(255, 170, 0, 0.1);
    --status-alarm-border: rgba(255, 170, 0, 0.3);
    --status-offline: #4a5a6a;
    --status-offline-bg: rgba(74, 90, 106, 0.1);
    --status-offline-border: rgba(74, 90, 106, 0.3);
}

html { color-scheme: dark; }
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background: var(--bg-base);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(255, 215, 0, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(245, 240, 232, 0.02) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(255, 215, 0, 0.02) 0%, transparent 50%);
    color: var(--text-body);
    min-height: 100vh;
    display: grid;
    grid-template-rows: auto 1fr auto;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 215, 0, 0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 215, 0, 0.25); }
a { text-decoration: none; color: inherit; }

/* ═══════════════════════════════════════
   TOP BAR
   ═══════════════════════════════════════ */
.topbar { position: sticky; top: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 0 40px; height: 68px; background: rgba(8, 12, 24, 0.85); backdrop-filter: blur(24px) saturate(1.3); -webkit-backdrop-filter: blur(24px) saturate(1.3); border-bottom: 1px solid var(--border); }
.topbar .tb-left { display: flex; align-items: center; gap: 18px; }
.topbar .tb-logo-img { height: 36px; width: auto; }
.topbar .tb-logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); animation: pulse-dot 2.5s ease-in-out infinite; }
.topbar .tb-logo { font-size: 20px; font-weight: 700; letter-spacing: 4px; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.3)); }
.topbar .tb-divider { width: 1px; height: 20px; background: var(--border); }
.topbar .tb-path { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 8px; }
.topbar .tb-path a:hover { color: var(--accent); }
.topbar .tb-path .sep { color: var(--text-faint); }
.topbar .tb-path .cur { color: var(--text-body); }
.topbar .tb-right { display: flex; align-items: center; gap: 10px; }
.topbar .tb-back { display: inline-flex; align-items: center; gap: 6px; padding: 7px 18px; border-radius: 8px; font-size: 14px; color: var(--text-muted); transition: all 0.2s; border: 1px solid var(--border); background: rgba(12, 18, 36, 0.6); }
.topbar .tb-back:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--neon-glow); }
@keyframes pulse-dot { 0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 8px var(--accent-green); } 50% { opacity: 0.5; transform: scale(0.85); box-shadow: 0 0 4px var(--accent-green); } }

/* ═══════════════════════════════════════
   HERO
   ═══════════════════════════════════════ */
.hero { position: relative; z-index: 1; padding: 48px 24px 12px; text-align: center; }
.hero .hero-logo { height: 42px; width: auto; margin-right: 18px; margin-top: 4px; filter: drop-shadow(0 0 12px rgba(255, 215, 0, 0.2)); vertical-align: middle; -webkit-text-fill-color: initial; background: none !important; }
.hero h1 { display: inline-flex; align-items: center; justify-content: center; font-size: 48px; font-weight: 800; letter-spacing: 14px; margin: 0; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.15; filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.2)); }
.hero .sub { margin-top: 10px; font-size: 14px; color: var(--text-muted); letter-spacing: 10px; text-transform: uppercase; }
.hero .hero-line { margin: 18px auto 0; width: 80px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent); opacity: 0.5; box-shadow: 0 0 10px rgba(255, 215, 0, 0.2); }

/* ═══════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════ */
.container { position: relative; z-index: 1; max-width: 1400px; margin: 0 auto; padding: 20px 40px 100px; }

/* ═══════════════════════════════════════
   SECTION HEADER
   ═══════════════════════════════════════ */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.section-header .sh-left { display: flex; align-items: center; gap: 12px; }
.section-header .sh-icon { font-size: 20px; opacity: 0.8; }
.section-header .sh-title { font-size: 16px; font-weight: 600; letter-spacing: 2px; color: var(--text-body); text-transform: uppercase; }
.section-header .sh-count { font-size: 12px; font-weight: 500; padding: 4px 16px; border-radius: 20px; background: rgba(0, 240, 255, 0.06); border: 1px solid var(--border); color: var(--text-muted); }

/* ═══════════════════════════════════════
   GRID
   ═══════════════════════════════════════ */
.cards { display: grid; gap: 18px; }
.cards-3 { grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); }
.cards-2 { grid-template-columns: repeat(auto-fill, minmax(440px, 1fr)); }

/* ═══════════════════════════════════════
   CARD
   ═══════════════════════════════════════ */
.card { position: relative; background: var(--bg-card); border-radius: 16px; padding: 34px; transition: all 0.3s ease; border: 1px solid var(--border); box-shadow: var(--shadow-sm); backdrop-filter: blur(10px); }
.card > * { position: relative; z-index: 1; }
.card-hover:hover { box-shadow: var(--neon-glow-strong); border-color: rgba(0, 240, 255, 0.35); transform: translateY(-2px); }

/* ═══════════════════════════════════════
   PARK CARD
   ═══════════════════════════════════════ */
.park-card { padding: 34px; }
.park-card .pk-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.park-card .pk-name { font-size: 24px; font-weight: 700; color: var(--text-heading); letter-spacing: 0.3px; }
.park-card .pk-badge { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 500; padding: 5px 18px; border-radius: 20px; letter-spacing: 0.3px; }
.park-card .pk-badge.online { background: var(--status-online-bg); border: 1px solid var(--status-online-border); color: var(--status-online); }
.park-card .pk-badge.online::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--status-online); box-shadow: 0 0 6px var(--status-online); }
.park-card .pk-addr { font-size: 14px; color: var(--text-muted); margin-bottom: 22px; }
.park-card .pk-stats { display: flex; gap: 6px; background: var(--bg-stats-well); border-radius: 14px; padding: 20px 24px; border: 1px solid var(--border-light); }
.park-card .pk-stat { flex: 1; text-align: center; position: relative; }
.park-card .pk-stat + .pk-stat::before { content: ''; position: absolute; left: 0; top: 12%; height: 76%; width: 1px; background: var(--border); }
.park-card .pk-stat-num { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; }
.park-card .pk-stat-num.primary { color: var(--accent); text-shadow: 0 0 10px rgba(255, 215, 0, 0.3); }
.park-card .pk-stat-num.accent { color: var(--accent-green); text-shadow: 0 0 10px rgba(245, 240, 232, 0.3); }
.park-card .pk-stat-num.dim { color: var(--text-muted); }
.park-card .pk-stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; letter-spacing: 1px; text-transform: uppercase; }

/* ═══════════════════════════════════════
   DEVICE CARD
   ═══════════════════════════════════════ */
.device-card { padding: 30px; }
.device-card .dc-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
.device-card .dc-name { font-size: 18px; font-weight: 600; color: var(--text-heading); }
.device-card .dc-type { font-size: 12px; color: var(--text-muted); margin-top: 4px; font-family: 'SF Mono', 'Fira Code', monospace; }
.device-card .dc-badge { font-size: 12px; font-weight: 500; padding: 4px 18px; border-radius: 20px; white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.device-card .dc-badge.running::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--status-online); box-shadow: 0 0 6px var(--status-online); }
.device-card .dc-badge.running { background: var(--status-online-bg); border: 1px solid var(--status-online-border); color: var(--status-online); }
.device-card .dc-badge.stopped { background: var(--status-offline-bg); border: 1px solid var(--status-offline-border); color: var(--status-offline); }
.device-card .dc-badge.alarm { background: var(--status-alarm-bg); border: 1px solid var(--status-alarm-border); color: var(--status-alarm); }
.device-card .dc-metrics { display: flex; gap: 14px; }
.device-card .dc-metric { flex: 1; background: var(--bg-metric); border-radius: 12px; padding: 14px 12px; text-align: center; border: 1px solid var(--border-light); }
.device-card .dc-metric-val { font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; }
.device-card .dc-metric-val.primary { color: var(--accent); text-shadow: 0 0 8px rgba(255, 215, 0, 0.25); }
.device-card .dc-metric-val.accent { color: var(--accent-green); text-shadow: 0 0 8px rgba(245, 240, 232, 0.25); }
.device-card .dc-metric-val.dim { color: var(--text-faint); }
.device-card .dc-metric-label { font-size: 11px; color: var(--text-muted); margin-top: 6px; letter-spacing: 0.5px; }

/* ═══════════════════════════════════════
   STAT CARD
   ═══════════════════════════════════════ */
.stat-card { text-align: center; padding: 44px 28px 40px; }
.stat-card .sc-icon { font-size: 36px; margin-bottom: 18px; display: block; opacity: 0.7; }
.stat-card .sc-label { font-size: 12px; color: var(--text-muted); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 14px; }
.stat-card .sc-value { font-size: 48px; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text-stat); letter-spacing: 1px; text-shadow: 0 0 15px rgba(255, 215, 0, 0.15); }
.stat-card .sc-value .unit { font-size: 16px; font-weight: 400; color: var(--text-muted); margin-left: 6px; text-shadow: none; }
.stat-card .sc-hint { font-size: 12px; color: var(--text-muted); margin-top: 12px; letter-spacing: 2px; }

/* ═══════════════════════════════════════
   EMPTY STATE
   ═══════════════════════════════════════ */
.empty-state { grid-column: 1 / -1; text-align: center; padding: 100px 20px; }
.empty-state .es-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.3; }
.empty-state .es-text { font-size: 14px; color: var(--text-muted); letter-spacing: 1.5px; }

/* ═══════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.card { animation: fadeUp 0.4s ease both; }
.card:nth-child(1) { animation-delay: 0.02s; }
.card:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3) { animation-delay: 0.08s; }
.card:nth-child(4) { animation-delay: 0.11s; }
.card:nth-child(5) { animation-delay: 0.14s; }
.card:nth-child(6) { animation-delay: 0.17s; }

/* ═══════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════ */
.footer {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 24px 20px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}
.footer p {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.6;
    white-space: nowrap;
}
.footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}
.footer a:hover { color: var(--accent); }
.footer img {
    height: 13px;
    vertical-align: middle;
    margin-right: 3px;
    opacity: 0.5;
}
.footer-line {
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.4;
    box-shadow: 0 0 8px rgba(255, 215, 0, 0.15);
}

@media (max-width: 768px) {
    .topbar { padding: 0 16px; height: 52px; }
    .topbar .tb-path { display: none; }
    .hero { padding: 20px 16px 6px; }
    .hero .hero-logo { height: 28px; margin-right: 10px; margin-top: 2px; }
    .hero h1 { font-size: 28px; letter-spacing: 6px; }
    .hero .sub { font-size: 11px; letter-spacing: 4px; }
    .container { padding: 16px 16px 60px; }
    .cards-3, .cards-2 { grid-template-columns: 1fr; }
    .section-header { gap: 8px; }
    .card { padding: 22px; }
    .park-card .pk-name { font-size: 20px; }
    .park-card .pk-stats { gap: 6px; padding: 14px 16px; }
    .park-card .pk-stat + .pk-stat::before { display: none; }
    .park-card .pk-stat-num { font-size: 24px; }
    .device-card .dc-header { flex-wrap: wrap; gap: 8px; }
    .device-card .dc-metrics { flex-wrap: wrap; }
    .device-card .dc-metric { min-width: calc(50% - 7px); }
    .device-card .dc-metric-val { font-size: 20px; }
    .stat-card .sc-value { font-size: 36px; }
    .footer { flex-direction: column; gap: 4px; }
    .footer-line { width: 40px; }
    .footer p { white-space: normal; text-align: center; }
}

@media (max-width: 480px) {
    .hero .hero-logo { height: 24px; margin-right: 8px; }
    .hero h1 { font-size: 22px; letter-spacing: 4px; }
    .hero .sub { font-size: 10px; letter-spacing: 2px; }
    .topbar .tb-logo { font-size: 16px; letter-spacing: 2px; }
    .topbar .tb-logo-dot { width: 8px; height: 8px; }
    .topbar .tb-back span { display: none; }
    .topbar .tb-back { padding: 7px 12px; }
    .container { padding: 12px 12px 50px; }
    .cards { gap: 12px; }
    .card { padding: 18px; border-radius: 12px; }
    .park-card .pk-name { font-size: 18px; }
    .park-card .pk-stat-num { font-size: 20px; }
    .device-card .dc-metrics { gap: 8px; }
    .device-card .dc-metric { min-width: calc(50% - 4px); padding: 10px 8px; }
    .device-card .dc-metric-val { font-size: 18px; }
    .stat-card { padding: 28px 16px 24px; }
    .stat-card .sc-value { font-size: 28px; }
    .stat-card .sc-icon { font-size: 28px; margin-bottom: 12px; }
}