:root {
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-soft: #eff6ff;
    --ok: #16a34a;
    --bad: #dc2626;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 8px 24px rgba(15, 23, 42, 0.06);
    --max: 1080px;
    --header-h: 64px;
    --pro-black: #0a0a0a;
    --pro-black-soft: #1c1917;
    --pro-gold: #d4af37;
    --pro-gold-light: #fbbf24;
}
@keyframes nav-pro-badge-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.28); }
    50% { box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.1); }
}
@keyframes nav-pro-dot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
}
.nav-account__avatar-wrap.is-pro .nav-account__avatar-ph {
    color: var(--pro-gold-light);
}
.nav-account__avatar-v {
    color: var(--pro-gold-light);
    border-color: var(--pro-gold);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; }

.flash {
    padding: 12px 20px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 1px solid var(--border);
}
.flash--info { background: #eff6ff; color: #1e40af; }
.flash--success { background: #ecfdf5; color: #047857; }
.flash--error { background: #fef2f2; color: #b91c1c; }

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    overflow: visible;
}
.header__inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1rem;
    color: var(--text);
    flex-shrink: 0;
}
.brand:hover { color: var(--accent); text-decoration: none; }
.brand img { height: 32px; width: auto; display: block; }
.nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    padding: 8px 12px;
    border-radius: 8px;
    transition: color .15s, background .15s;
}
.nav a:hover {
    color: var(--text);
    background: rgba(15, 23, 42, 0.04);
    text-decoration: none;
}
.nav a.nav--active { color: var(--text); }

@keyframes nav-account-dropdown-in {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.nav-account {
    position: relative;
    display: inline-flex;
    align-items: stretch;
    flex-direction: column;
    max-width: min(100%, 320px);
}
.nav-account__trigger {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    width: 100%;
    max-width: 100%;
    padding: 4px 8px 4px 4px;
    margin: 0;
    border: 1px solid transparent;
    border-radius: 999px;
    background: transparent;
    color: inherit;
    cursor: pointer;
    font: inherit;
    text-align: left;
    transition: background .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.nav-account__trigger:hover {
    background: rgba(15, 23, 42, 0.04);
}
.nav-account__trigger:focus {
    outline: none;
}
.nav-account__trigger:focus-visible {
    border-color: rgba(37, 99, 235, 0.45);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}
.nav-account.is-open .nav-account__trigger {
    background: rgba(37, 99, 235, 0.06);
    border-color: rgba(37, 99, 235, 0.18);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.nav-account__chevron {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    transition: transform .22s ease, color .18s ease;
}
.nav-account__chevron svg {
    width: 16px;
    height: 16px;
}
.nav-account.is-open .nav-account__chevron {
    transform: rotate(180deg);
    color: var(--accent);
}
.nav-account__avatar-wrap.is-pro .nav-account__avatar-ph {
    color: var(--pro-gold-light);
}
.nav-account__avatar-v {
    color: var(--pro-gold-light);
    border-color: var(--pro-gold);
}
.nav-account__meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    line-height: 1.25;
}
.nav-account__name-row {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
}
.nav-account__name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.nav-account__badge {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 7px 2px 5px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--pro-gold-light);
    background: linear-gradient(135deg, rgba(30, 27, 75, 0.95) 0%, rgba(15, 15, 18, 0.98) 100%);
    border: 1px solid rgba(212, 175, 55, 0.5);
    box-shadow: inset 0 1px 0 rgba(251, 191, 36, 0.12);
}
.nav-account__badge--live {
    position: relative;
    overflow: hidden;
    animation: nav-pro-badge-pulse 3.2s ease-in-out infinite;
}
.nav-account__badge-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 6px rgba(74, 222, 128, 0.5);
    animation: nav-pro-dot 2s ease-in-out infinite;
    flex-shrink: 0;
}
.nav-account__email {
    font-size: 11px;
    color: var(--muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 168px;
}
.nav-account__dropdown {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    z-index: 120;
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 6px;
    border: 1px solid rgba(226, 232, 240, 0.95);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow:
        0 4px 6px rgba(15, 23, 42, 0.04),
        0 16px 40px rgba(15, 23, 42, 0.12);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transform-origin: top center;
    animation: nav-account-dropdown-in .2s ease;
}
.nav-account__dropdown::before {
    content: '';
    position: absolute;
    top: -5px;
    left: var(--nav-account-arrow-left, 22px);
    width: 10px;
    height: 10px;
    background: #fff;
    border-top: 1px solid rgba(226, 232, 240, 0.95);
    border-left: 1px solid rgba(226, 232, 240, 0.95);
    transform: rotate(45deg);
    box-shadow: -2px -2px 4px rgba(15, 23, 42, 0.03);
}
.nav-account__dropdown[hidden] {
    display: none !important;
}
.nav-account__dropdown-head {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 8px 10px 10px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--border);
}
.nav-account__dropdown-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.nav-account__dropdown-email {
    font-size: 11px;
    color: var(--muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.nav-account__dropdown-body {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-top: 2px;
}
.nav-account__menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
    transition: background .15s ease, color .15s ease;
}
.nav-account__menu-item:hover {
    background: rgba(15, 23, 42, 0.04);
    color: var(--text);
    text-decoration: none;
}
.nav-account__menu-item:focus-visible {
    outline: none;
    background: rgba(37, 99, 235, 0.08);
    box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.22);
}
.nav-account__menu-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9px;
    background: var(--accent-soft);
    color: var(--accent);
}
.nav-account__menu-icon svg {
    width: 16px;
    height: 16px;
}
.nav-account__menu-item--danger .nav-account__menu-icon {
    background: #fef2f2;
    color: #dc2626;
}
.nav-account__menu-item--danger:hover {
    background: #fef2f2;
}
.nav-account__menu-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}
.nav-account__menu-label {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.3;
}
.nav-account__menu-desc {
    font-size: 11px;
    font-weight: 400;
    color: var(--muted);
    line-height: 1.35;
}
.nav-account__menu-item--danger .nav-account__menu-label {
    color: #b91c1c;
}
.nav-account__menu-item--danger:hover .nav-account__menu-desc {
    color: #991b1b;
}
.nav-account.is-compact .nav-account__menu-icon,
.nav-account.is-compact .nav-account__menu-desc {
    display: none;
}
.nav-account.is-compact .nav-account__menu-item {
    justify-content: center;
    padding: 8px 6px;
}
.nav-account.is-compact .nav-account__menu-label {
    font-size: 12px;
}
.nav-account.is-compact .nav-account__dropdown-head {
    padding: 6px 8px 8px;
    text-align: center;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: background .15s, transform .1s, box-shadow .15s;
    text-decoration: none;
}
.btn:active { transform: scale(0.98); }
.btn--primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 1px 2px rgba(37, 99, 235, 0.2);
}
.btn--primary:hover {
    background: var(--accent-hover);
    color: #fff;
    text-decoration: none;
}
.btn--ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn--ghost:hover {
    background: var(--surface);
    border-color: #cbd5e1;
    color: var(--text);
    text-decoration: none;
}
.btn--sm { padding: 8px 14px; font-size: 13px; }

.page { flex: 1; }
.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 24px;
}

.footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 40px 0 24px;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
.footer__brand img { height: 28px; margin-bottom: 12px; }
.footer__mark {
    display: inline-block;
    width: 28px; height: 28px;
    border-radius: 8px;
    background: linear-gradient(145deg, #334155, #0f172a);
    margin-bottom: 12px;
}
.footer__tagline {
    margin: 0;
    font-size: 13px;
    color: var(--muted);
    line-height: 1.65;
    max-width: 28em;
}
.footer h4 {
    margin: 0 0 12px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94a3b8;
}
.footer ul {
    margin: 0;
    padding: 0;
    list-style: none;
}
.footer li { margin-bottom: 8px; }
.footer a {
    font-size: 14px;
    color: #475569;
    font-weight: 500;
}
.footer a:hover { color: var(--text); }
.footer__bottom {
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px;
    font-size: 12px;
    color: var(--muted);
}

@media (max-width: 900px) {
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .nav-account__email { display: none; }
}
@media (max-width: 600px) {
    .header__inner { padding: 0 16px; }
    .wrap { padding: 0 16px; }
    .footer__grid { grid-template-columns: 1fr; }
    .nav-account { max-width: none; }
    .nav-account__trigger {
        padding: 3px;
        gap: 0;
    }
    .nav-account__meta,
    .nav-account__chevron {
        display: none;
    }
    .nav-account__avatar-wrap {
        width: 38px;
        height: 38px;
    }
    .nav-account__avatar-wrap.is-pro {
        width: 42px;
        height: 42px;
    }
    .nav-account__dropdown {
        left: auto;
        right: 0;
        width: max-content;
        max-width: calc(100vw - 24px);
        min-width: 0;
        padding: 8px;
        border-radius: 16px;
        transform-origin: top right;
    }
    .nav-account__dropdown-head {
        gap: 4px;
        padding: 10px 12px 12px;
        margin-bottom: 6px;
    }
    .nav-account__dropdown-name,
    .nav-account__dropdown-email {
        white-space: nowrap;
        max-width: min(220px, calc(100vw - 64px));
    }
    .nav-account__dropdown-name {
        font-size: 14px;
    }
    .nav-account__dropdown-email {
        font-size: 12px;
    }
    .nav-account__dropdown-body {
        gap: 4px;
        padding-top: 0;
        width: max-content;
        max-width: 100%;
    }
    .nav-account__menu-item {
        gap: 12px;
        padding: 11px 12px;
        border-radius: 12px;
        width: max-content;
        max-width: 100%;
    }
    .nav-account__menu-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }
    .nav-account__menu-label {
        font-size: 14px;
        white-space: nowrap;
    }
    .nav-account__menu-desc {
        font-size: 12px;
        white-space: nowrap;
    }
    .nav-account__menu-text {
        gap: 2px;
    }
}
@media (prefers-reduced-motion: reduce) {
    .nav-account__avatar-ring,
    .nav-account__badge--live,
    .nav-account__badge-dot,
    .nav-account__avatar-wrap.is-pro {
        animation: none !important;
    }
    .nav-account__dropdown {
        animation: none;
    }
    .nav-account__chevron {
        transition: none;
    }
}