/* ========================================================================
   牛栏山账本系统 - 21套主题与组件升级样式 v=20260726
   接入主系统主题体系，保留账本系统原有变量命名
   ======================================================================== */

/* ============ 字体尺寸规范（与主系统统一） ============ */
:root {
    --text-2xs: 10px;
    --text-xs: 11px;
    --text-sm: 13px;
    --text-base: 15px;
    --text-lg: 18px;
    --text-xl: 22px;
    --text-2xl: 28px;

    /* 图标尺寸 */
    --icon-xs: 10px;
    --icon-sm: 12px;
    --icon-md: 16px;
    --icon-lg: 22px;
    --icon-xl: 32px;
    --icon-2xl: 48px;

    /* 奖牌色 */
    --medal-gold: #FFD700;
    --medal-silver: #C0C0C0;
    --medal-bronze: #CD7F32;

    /* 扩展语义色（按钮分类） */
    --purple: #a855f7;
    --cyan: #06b6d4;
    --indigo: #6366f1;
    --red: #ef4444;
    --orange: #f97316;
    --teal: #14b8a6;
    --pink: #ec4899;
    --slate: #64748b;
    --emerald: #10b981;
}

/* ========================================================================
   21套主题 - 默认（无 data-style）= 深空蓝夜 shenlan
   ======================================================================== */

/* ---- 1. 深空蓝夜 (Shenlan) - 默认深色 ---- */
:root, [data-style="shenlan"] {
    --primary: #38bdf8;
    --primary-light: #7dd3fc;
    --primary-dark: #0ea5e9;
    --primary-glow: rgba(56, 189, 248, 0.35);
    --success: #34d399;
    --success-light: #6ee7b7;
    --success-bg: rgba(52, 211, 153, 0.12);
    --warning: #fbbf24;
    --warning-light: #fcd34d;
    --warning-bg: rgba(251, 191, 36, 0.12);
    --danger: #f87171;
    --danger-light: #fca5a5;
    --danger-bg: rgba(248, 113, 113, 0.12);
    --info: #818cf8;
    --info-bg: rgba(129, 140, 248, 0.12);
    --border-color: rgba(56, 189, 248, 0.18);
    --border-color-hover: rgba(56, 189, 248, 0.32);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --bg-body: linear-gradient(135deg, #0b1120 0%, #0f172a 50%, #1a1a2e 100%);
    --bg-secondary: rgba(255, 255, 255, 0.03);
    --bg-tertiary: rgba(255, 255, 255, 0.06);
    --bg-surface: rgba(30, 41, 59, 0.55);
    --bg-surface-hover: rgba(30, 41, 59, 0.75);
    --bg-card: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(11, 17, 32, 0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(11, 17, 32, 0.92) 100%);
    --bg-modal: linear-gradient(135deg, #0f172a 0%, #0b1120 100%);
    --bg-modal-header: #0f172a;
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(15, 23, 42, 0.6);
    --bg-nav: rgba(11, 17, 32, 0.6);
    --bg-nav-hover: rgba(56, 189, 248, 0.12);
    --bg-login: linear-gradient(135deg, #0b1120 0%, #0f172a 50%, #1a1a2e 100%);
    --bg-login-box: rgba(15, 23, 42, 0.6);
    --text-body: #e2e8f0;
    --header-bg: linear-gradient(135deg, rgba(56,189,248,0.18) 0%, rgba(129,140,248,0.1) 50%, rgba(56,189,248,0.08) 100%);
    --header-title: linear-gradient(135deg, #7dd3fc 0%, #e2e8f0 100%);
    --th-bg: linear-gradient(135deg, rgba(56,189,248,0.18) 0%, rgba(56,189,248,0.06) 100%);
    --th-line: rgba(56, 189, 248, 0.32);
    --tr-hover: rgba(56, 189, 248, 0.1);
    --btn-sec-bg: rgba(255, 255, 255, 0.06);
    --btn-sec-hover: rgba(255, 255, 255, 0.14);
    --modal-close-bg: rgba(255, 255, 255, 0.08);
    --modal-close-hover: rgba(255, 255, 255, 0.18);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow: 0 4px 12px rgba(0,0,0,0.35);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.45);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.55);
    --accent-color: #38bdf8;
    --bg-color: #0f172a;
}

/* ---- 2. 素白 (Clean White) ---- */
[data-style="clean"] {
    --primary: #A0673C;
    --primary-light: #c28561;
    --primary-dark: #8b5630;
    --primary-glow: rgba(160, 103, 60, 0.25);
    --success: #059669;
    --success-light: #6ee7b7;
    --success-bg: rgba(5, 150, 105, 0.08);
    --warning: #d97706;
    --warning-light: #fcd34d;
    --warning-bg: rgba(217, 119, 6, 0.08);
    --danger: #dc2626;
    --danger-light: #fca5a5;
    --danger-bg: rgba(220, 38, 38, 0.08);
    --info: #6366f1;
    --info-bg: rgba(99, 102, 241, 0.08);
    --border-color: rgba(160, 103, 60, 0.18);
    --border-color-hover: rgba(160, 103, 60, 0.32);
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --bg-body: linear-gradient(135deg, #f3f4f6 0%, #f9fafb 50%, #ffffff 100%);
    --bg-secondary: rgba(0, 0, 0, 0.02);
    --bg-tertiary: rgba(0, 0, 0, 0.04);
    --bg-surface: rgba(255, 255, 255, 0.95);
    --bg-surface-hover: rgba(255, 255, 255, 1);
    --bg-card: linear-gradient(135deg, #ffffff 0%, #f9fafb 100%);
    --bg-form: linear-gradient(135deg, #ffffff 0%, #f3f4f6 100%);
    --bg-modal: linear-gradient(135deg, #ffffff 0%, #f9fafb 100%);
    --bg-modal-header: #ffffff;
    --bg-input: #ffffff;
    --bg-input-focus: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.9);
    --bg-nav-hover: rgba(160, 103, 60, 0.08);
    --bg-login: linear-gradient(135deg, #f3f4f6 0%, #ede9e3 50%, #e7dfd6 100%);
    --bg-login-box: rgba(255, 255, 255, 0.95);
    --text-body: #1f2937;
    --header-bg: linear-gradient(135deg, rgba(160,103,60,0.08) 0%, rgba(99,102,241,0.04) 50%, rgba(160,103,60,0.06) 100%);
    --header-title: linear-gradient(135deg, #A0673C 0%, #1f2937 100%);
    --th-bg: linear-gradient(135deg, rgba(160,103,60,0.06) 0%, rgba(160,103,60,0.02) 100%);
    --th-line: rgba(160, 103, 60, 0.15);
    --tr-hover: rgba(160, 103, 60, 0.05);
    --btn-sec-bg: rgba(0, 0, 0, 0.04);
    --btn-sec-hover: rgba(0, 0, 0, 0.1);
    --modal-close-bg: rgba(0, 0, 0, 0.05);
    --modal-close-hover: rgba(0, 0, 0, 0.12);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.06);
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);
    --accent-color: #A0673C;
    --bg-color: #ffffff;
}

/* ---- 3. 琥珀 (Amber) ---- */
[data-style="amber"] {
    --primary: #fbbf24;
    --primary-light: #fcd34d;
    --primary-dark: #d97706;
    --primary-glow: rgba(251, 191, 36, 0.35);
    --success: #059669;
    --warning: #ea580c;
    --danger: #dc2626;
    --info: #0ea5e9;
    --border-color: rgba(251, 191, 36, 0.25);
    --border-color-hover: rgba(251, 191, 36, 0.45);
    --text-primary: #451a03;
    --text-secondary: #78350f;
    --text-muted: #92400e;
    --bg-body: linear-gradient(135deg, #fef3c7 0%, #fffbeb 50%, #fde68a 100%);
    --bg-secondary: rgba(180, 83, 9, 0.04);
    --bg-tertiary: rgba(180, 83, 9, 0.08);
    --bg-surface: rgba(255, 251, 235, 0.85);
    --bg-surface-hover: rgba(255, 251, 235, 0.95);
    --bg-card: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    --bg-form: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    --bg-modal: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    --bg-input: #ffffff;
    --bg-input-focus: #fffbeb;
    --bg-nav: rgba(254, 243, 199, 0.8);
    --bg-nav-hover: rgba(251, 191, 36, 0.15);
    --text-body: #451a03;
    --header-bg: linear-gradient(135deg, #451a03 0%, #78350f 100%);
    --header-title: linear-gradient(135deg, #fbbf24 0%, #fef3c7 100%);
    --th-bg: linear-gradient(135deg, rgba(180,83,9,0.18) 0%, rgba(180,83,9,0.06) 100%);
    --th-line: rgba(180, 83, 9, 0.3);
    --tr-hover: rgba(251, 191, 36, 0.1);
    --shadow: 0 4px 12px rgba(180, 83, 9, 0.15);
    --shadow-lg: 0 8px 24px rgba(180, 83, 9, 0.2);
    --accent-color: #d97706;
    --bg-color: #fffbeb;
}
[data-style="amber"] .header h1 { color: #fef3c7; }
[data-style="amber"] .header .date-display { color: #fde68a; }

/* ---- 4. 暗夜霓虹 (Neon Night) ---- */
[data-style="neon"] {
    --primary: #22d3ee;
    --primary-light: #67e8f9;
    --primary-dark: #06b6d4;
    --primary-glow: rgba(34, 211, 238, 0.4);
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f43f5e;
    --info: #818cf8;
    --border-color: rgba(34, 211, 238, 0.2);
    --border-color-hover: rgba(34, 211, 238, 0.4);
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --bg-body: linear-gradient(135deg, #09090b 0%, #18181b 50%, #1f1f23 100%);
    --bg-secondary: rgba(255, 255, 255, 0.02);
    --bg-tertiary: rgba(255, 255, 255, 0.05);
    --bg-surface: rgba(24, 24, 27, 0.7);
    --bg-surface-hover: rgba(39, 39, 42, 0.8);
    --bg-card: linear-gradient(135deg, rgba(24,24,27,0.9) 0%, rgba(9,9,11,0.95) 100%);
    --bg-form: linear-gradient(135deg, rgba(24,24,27,0.9) 0%, rgba(9,9,11,0.95) 100%);
    --bg-modal: linear-gradient(135deg, #18181b 0%, #09090b 100%);
    --bg-input: #27272a;
    --bg-input-focus: #3f3f46;
    --bg-nav: rgba(9, 9, 11, 0.7);
    --bg-nav-hover: rgba(34, 211, 238, 0.15);
    --text-body: #fafafa;
    --header-bg: linear-gradient(135deg, rgba(34,211,238,0.2) 0%, rgba(244,63,94,0.12) 50%, rgba(34,211,238,0.1) 100%);
    --header-title: linear-gradient(135deg, #22d3ee 0%, #fafafa 100%);
    --th-bg: linear-gradient(135deg, rgba(34,211,238,0.15) 0%, rgba(34,211,238,0.04) 100%);
    --th-line: rgba(34, 211, 238, 0.3);
    --tr-hover: rgba(34, 211, 238, 0.08);
    --accent-color: #22d3ee;
    --bg-color: #18181b;
}

/* ---- 5. 钛合金灰 (Titanium) ---- */
[data-style="titanium"] {
    --primary: #94a3b8;
    --primary-light: #cbd5e1;
    --primary-dark: #64748b;
    --primary-glow: rgba(148, 163, 184, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(148, 163, 184, 0.25);
    --border-color-hover: rgba(148, 163, 184, 0.45);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --bg-body: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(51, 65, 85, 0.55);
    --bg-surface-hover: rgba(71, 85, 105, 0.7);
    --bg-card: linear-gradient(135deg, rgba(30,41,59,0.85) 0%, rgba(15,23,42,0.95) 100%);
    --bg-form: linear-gradient(135deg, rgba(30,41,59,0.85) 0%, rgba(15,23,42,0.95) 100%);
    --bg-modal: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(15, 23, 42, 0.6);
    --bg-nav: rgba(15, 23, 42, 0.7);
    --bg-nav-hover: rgba(148, 163, 184, 0.15);
    --text-body: #f1f5f9;
    --header-bg: linear-gradient(135deg, rgba(148,163,184,0.18) 0%, rgba(71,85,105,0.1) 50%, rgba(148,163,184,0.08) 100%);
    --header-title: linear-gradient(135deg, #cbd5e1 0%, #f1f5f9 100%);
    --th-bg: linear-gradient(135deg, rgba(148,163,184,0.15) 0%, rgba(148,163,184,0.04) 100%);
    --th-line: rgba(148, 163, 184, 0.3);
    --tr-hover: rgba(148, 163, 184, 0.1);
    --accent-color: #94a3b8;
    --bg-color: #1e293b;
}

/* ---- 6. 北欧极简 (Nordic) ---- */
[data-style="nordic"] {
    --primary: #1e293b;
    --primary-light: #475569;
    --primary-dark: #0f172a;
    --primary-glow: rgba(30, 41, 59, 0.2);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-color-hover: rgba(0, 0, 0, 0.18);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --bg-body: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f8fafc;
    --bg-card: #ffffff;
    --bg-form: #f8fafc;
    --bg-modal: #ffffff;
    --bg-input: #ffffff;
    --bg-input-focus: #f8fafc;
    --bg-nav: #f8fafc;
    --bg-nav-hover: #e2e8f0;
    --text-body: #0f172a;
    --header-bg: #ffffff;
    --header-title: #0f172a;
    --th-bg: #f1f5f9;
    --th-line: #cbd5e1;
    --tr-hover: #f1f5f9;
    --btn-sec-bg: rgba(0, 0, 0, 0.04);
    --btn-sec-hover: rgba(0, 0, 0, 0.08);
    --modal-close-bg: rgba(0, 0, 0, 0.05);
    --modal-close-hover: rgba(0, 0, 0, 0.1);
    --shadow: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
    --accent-color: #0f172a;
    --bg-color: #ffffff;
}

/* ---- 7. 日落橙辉 (Sunset) ---- */
[data-style="sunset"] {
    --primary: #f97316;
    --primary-light: #fb923c;
    --primary-dark: #ea580c;
    --primary-glow: rgba(249, 115, 22, 0.4);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(249, 115, 22, 0.25);
    --border-color-hover: rgba(249, 115, 22, 0.45);
    --text-primary: #fef3c7;
    --text-secondary: #fed7aa;
    --text-muted: #fdba74;
    --bg-body: linear-gradient(135deg, #7c2d12 0%, #9a3412 50%, #c2410c 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(124, 45, 18, 0.5);
    --bg-surface-hover: rgba(154, 52, 18, 0.7);
    --bg-card: linear-gradient(135deg, rgba(124,45,18,0.85) 0%, rgba(67,20,7,0.95) 100%);
    --bg-form: linear-gradient(135deg, rgba(124,45,18,0.85) 0%, rgba(67,20,7,0.95) 100%);
    --bg-modal: linear-gradient(135deg, #7c2d12 0%, #431407 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(15, 23, 42, 0.6);
    --bg-nav: rgba(67, 20, 7, 0.7);
    --bg-nav-hover: rgba(249, 115, 22, 0.18);
    --text-body: #fef3c7;
    --header-bg: linear-gradient(135deg, rgba(249,115,22,0.25) 0%, rgba(251,146,60,0.15) 50%, rgba(251,191,36,0.12) 100%);
    --header-title: linear-gradient(135deg, #fdba74 0%, #fef3c7 100%);
    --th-bg: linear-gradient(135deg, rgba(249,115,22,0.2) 0%, rgba(249,115,22,0.06) 100%);
    --th-line: rgba(249, 115, 22, 0.4);
    --tr-hover: rgba(249, 115, 22, 0.12);
    --accent-color: #f97316;
    --bg-color: #7c2d12;
}

/* ---- 8. 曜石黑金 (Obsidian) ---- */
[data-style="obsidian"] {
    --primary: #fbbf24;
    --primary-light: #fcd34d;
    --primary-dark: #d97706;
    --primary-glow: rgba(251, 191, 36, 0.4);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(251, 191, 36, 0.22);
    --border-color-hover: rgba(251, 191, 36, 0.42);
    --text-primary: #fef3c7;
    --text-secondary: #d4d4d8;
    --text-muted: #a1a1aa;
    --bg-body: linear-gradient(135deg, #0c0a09 0%, #1c1917 50%, #292524 100%);
    --bg-secondary: rgba(255, 255, 255, 0.03);
    --bg-tertiary: rgba(255, 255, 255, 0.06);
    --bg-surface: rgba(28, 25, 23, 0.7);
    --bg-surface-hover: rgba(41, 37, 36, 0.8);
    --bg-card: linear-gradient(135deg, rgba(12,10,9,0.92) 0%, rgba(28,25,23,0.95) 100%);
    --bg-form: linear-gradient(135deg, rgba(12,10,9,0.92) 0%, rgba(28,25,23,0.95) 100%);
    --bg-modal: linear-gradient(135deg, #1c1917 0%, #0c0a09 100%);
    --bg-input: rgba(0, 0, 0, 0.4);
    --bg-input-focus: rgba(28, 25, 23, 0.7);
    --bg-nav: rgba(12, 10, 9, 0.7);
    --bg-nav-hover: rgba(251, 191, 36, 0.15);
    --text-body: #fef3c7;
    --header-bg: linear-gradient(135deg, rgba(251,191,36,0.2) 0%, rgba(245,158,11,0.12) 50%, rgba(251,191,36,0.08) 100%);
    --header-title: linear-gradient(135deg, #fbbf24 0%, #fef3c7 100%);
    --th-bg: linear-gradient(135deg, rgba(251,191,36,0.15) 0%, rgba(251,191,36,0.04) 100%);
    --th-line: rgba(251, 191, 36, 0.3);
    --tr-hover: rgba(251, 191, 36, 0.1);
    --accent-color: #fbbf24;
    --bg-color: #0c0a09;
}

/* ---- 9. 冰川蓝川 (Glacier) ---- */
[data-style="glacier"] {
    --primary: #0284c7;
    --primary-light: #7dd3fc;
    --primary-dark: #0369a1;
    --primary-glow: rgba(2, 132, 199, 0.25);
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #6366f1;
    --border-color: rgba(2, 132, 199, 0.18);
    --border-color-hover: rgba(2, 132, 199, 0.32);
    --text-primary: #0c4a6e;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --bg-body: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0f9ff 100%);
    --bg-secondary: rgba(2, 132, 199, 0.03);
    --bg-tertiary: rgba(2, 132, 199, 0.06);
    --bg-surface: rgba(255, 255, 255, 0.85);
    --bg-surface-hover: rgba(255, 255, 255, 0.95);
    --bg-card: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    --bg-form: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    --bg-modal: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    --bg-input: #ffffff;
    --bg-input-focus: #f0f9ff;
    --bg-nav: rgba(240, 249, 255, 0.9);
    --bg-nav-hover: rgba(125, 211, 252, 0.18);
    --text-body: #0c4a6e;
    --header-bg: linear-gradient(135deg, #0c4a6e 0%, #0369a1 100%);
    --header-title: linear-gradient(135deg, #7dd3fc 0%, #e0f2fe 100%);
    --th-bg: linear-gradient(135deg, rgba(2,132,199,0.08) 0%, rgba(2,132,199,0.02) 100%);
    --th-line: rgba(2, 132, 199, 0.18);
    --tr-hover: rgba(125, 211, 252, 0.12);
    --shadow: 0 4px 12px rgba(2, 132, 199, 0.1);
    --shadow-lg: 0 8px 24px rgba(2, 132, 199, 0.15);
    --accent-color: #0284c7;
    --bg-color: #ffffff;
}
[data-style="glacier"] .header h1 { color: #e0f2fe; }
[data-style="glacier"] .header .date-display { color: #bae6fd; }

/* ---- 10. 青瓷雅韵 (Celadon) ---- */
[data-style="celadon"] {
    --primary: #0f766e;
    --primary-light: #5eead4;
    --primary-dark: #115e59;
    --primary-glow: rgba(15, 118, 110, 0.25);
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #6366f1;
    --border-color: rgba(15, 118, 110, 0.18);
    --border-color-hover: rgba(15, 118, 110, 0.32);
    --text-primary: #2d4a43;
    --text-secondary: #5f7a75;
    --text-muted: #8aa39e;
    --bg-body: linear-gradient(135deg, #f2f7f5 0%, #e0efec 50%, #f2f7f5 100%);
    --bg-secondary: rgba(15, 118, 110, 0.03);
    --bg-tertiary: rgba(15, 118, 110, 0.06);
    --bg-surface: rgba(255, 255, 255, 0.85);
    --bg-surface-hover: rgba(255, 255, 255, 0.95);
    --bg-card: linear-gradient(135deg, #ffffff 0%, #f2f7f5 100%);
    --bg-form: linear-gradient(135deg, #ffffff 0%, #f2f7f5 100%);
    --bg-modal: linear-gradient(135deg, #ffffff 0%, #e0efec 100%);
    --bg-input: #ffffff;
    --bg-input-focus: #f2f7f5;
    --bg-nav: rgba(242, 247, 245, 0.9);
    --bg-nav-hover: rgba(94, 234, 212, 0.18);
    --text-body: #2d4a43;
    --header-bg: linear-gradient(135deg, #2d4a43 0%, #115e59 100%);
    --header-title: linear-gradient(135deg, #5eead4 0%, #e0efec 100%);
    --th-bg: linear-gradient(135deg, rgba(15,118,110,0.08) 0%, rgba(15,118,110,0.02) 100%);
    --th-line: rgba(15, 118, 110, 0.18);
    --tr-hover: rgba(94, 234, 212, 0.12);
    --shadow: 0 4px 12px rgba(15, 118, 110, 0.1);
    --shadow-lg: 0 8px 24px rgba(15, 118, 110, 0.15);
    --accent-color: #0f766e;
    --bg-color: #ffffff;
}
[data-style="celadon"] .header h1 { color: #e0efec; }
[data-style="celadon"] .header .date-display { color: #99f6e4; }

/* ---- 11. 沙漠驼铃 (Desert) ---- */
[data-style="desert"] {
    --primary: #c2691f;
    --primary-light: #d68a4d;
    --primary-dark: #9a4f12;
    --primary-glow: rgba(194, 105, 31, 0.3);
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #6366f1;
    --border-color: rgba(194, 105, 31, 0.2);
    --border-color-hover: rgba(194, 105, 31, 0.4);
    --text-primary: #3d2817;
    --text-secondary: #5c3a22;
    --text-muted: #8b6f47;
    --bg-body: linear-gradient(135deg, #f7f3ec 0%, #ede0c8 50%, #d4b896 100%);
    --bg-secondary: rgba(194, 105, 31, 0.04);
    --bg-tertiary: rgba(194, 105, 31, 0.08);
    --bg-surface: rgba(255, 252, 245, 0.85);
    --bg-surface-hover: rgba(255, 252, 245, 0.95);
    --bg-card: linear-gradient(135deg, #f7f3ec 0%, #ede0c8 100%);
    --bg-form: linear-gradient(135deg, #f7f3ec 0%, #ede0c8 100%);
    --bg-modal: linear-gradient(135deg, #f7f3ec 0%, #ede0c8 100%);
    --bg-input: #ffffff;
    --bg-input-focus: #f7f3ec;
    --bg-nav: rgba(247, 243, 236, 0.9);
    --bg-nav-hover: rgba(194, 105, 31, 0.12);
    --text-body: #3d2817;
    --header-bg: linear-gradient(135deg, #3d2817 0%, #5c3a22 100%);
    --header-title: linear-gradient(135deg, #d68a4d 0%, #f7f3ec 100%);
    --th-bg: linear-gradient(135deg, rgba(194,105,31,0.1) 0%, rgba(194,105,31,0.03) 100%);
    --th-line: rgba(194, 105, 31, 0.22);
    --tr-hover: rgba(194, 105, 31, 0.1);
    --shadow: 0 4px 12px rgba(194, 105, 31, 0.12);
    --shadow-lg: 0 8px 24px rgba(194, 105, 31, 0.18);
    --accent-color: #c2691f;
    --bg-color: #f7f3ec;
}
[data-style="desert"] .header h1 { color: #f7f3ec; }
[data-style="desert"] .header .date-display { color: #ede0c8; }

/* ---- 12. 翡翠墨绿 (Emerald) ---- */
[data-style="emerald"] {
    --primary: #10b981;
    --primary-light: #34d399;
    --primary-dark: #047857;
    --primary-glow: rgba(16, 185, 129, 0.35);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(16, 185, 129, 0.2);
    --border-color-hover: rgba(16, 185, 129, 0.4);
    --text-primary: #ecfdf5;
    --text-secondary: #a7f3d0;
    --text-muted: #6ee7b7;
    --bg-body: linear-gradient(135deg, #022c22 0%, #064e3b 50%, #065f46 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(6, 78, 59, 0.55);
    --bg-surface-hover: rgba(6, 95, 70, 0.7);
    --bg-card: linear-gradient(135deg, rgba(2,44,34,0.9) 0%, rgba(6,78,59,0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(2,44,34,0.9) 0%, rgba(6,78,59,0.92) 100%);
    --bg-modal: linear-gradient(135deg, #064e3b 0%, #022c22 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(2, 44, 34, 0.6);
    --bg-nav: rgba(2, 44, 34, 0.7);
    --bg-nav-hover: rgba(16, 185, 129, 0.18);
    --text-body: #ecfdf5;
    --header-bg: linear-gradient(135deg, rgba(16,185,129,0.2) 0%, rgba(52,211,153,0.12) 50%, rgba(16,185,129,0.08) 100%);
    --header-title: linear-gradient(135deg, #6ee7b7 0%, #ecfdf5 100%);
    --th-bg: linear-gradient(135deg, rgba(16,185,129,0.18) 0%, rgba(16,185,129,0.04) 100%);
    --th-line: rgba(16, 185, 129, 0.32);
    --tr-hover: rgba(16, 185, 129, 0.1);
    --accent-color: #10b981;
    --bg-color: #022c22;
}

/* ---- 13. 樱花粉 (Cherry Blossom) ---- */
[data-style="cherry"] {
    --primary: #ec4899;
    --primary-light: #f9a8d4;
    --primary-dark: #be185d;
    --primary-glow: rgba(236, 72, 153, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(236, 72, 153, 0.22);
    --border-color-hover: rgba(236, 72, 153, 0.42);
    --text-primary: #fdf2f8;
    --text-secondary: #fbcfe8;
    --text-muted: #f9a8d4;
    --bg-body: linear-gradient(135deg, #500724 0%, #831843 50%, #9d174d 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(131, 24, 67, 0.55);
    --bg-surface-hover: rgba(157, 23, 77, 0.7);
    --bg-card: linear-gradient(135deg, rgba(80,7,36,0.9) 0%, rgba(131,24,67,0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(80,7,36,0.9) 0%, rgba(131,24,67,0.92) 100%);
    --bg-modal: linear-gradient(135deg, #831843 0%, #500724 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(80, 7, 36, 0.6);
    --bg-nav: rgba(80, 7, 36, 0.7);
    --bg-nav-hover: rgba(236, 72, 153, 0.18);
    --text-body: #fdf2f8;
    --header-bg: linear-gradient(135deg, rgba(236,72,153,0.2) 0%, rgba(249,168,212,0.12) 50%, rgba(236,72,153,0.08) 100%);
    --header-title: linear-gradient(135deg, #f9a8d4 0%, #fdf2f8 100%);
    --th-bg: linear-gradient(135deg, rgba(236,72,153,0.18) 0%, rgba(236,72,153,0.04) 100%);
    --th-line: rgba(236, 72, 153, 0.32);
    --tr-hover: rgba(236, 72, 153, 0.1);
    --accent-color: #ec4899;
    --bg-color: #500724;
}

/* ---- 14. 大地色系 (Earth) ---- */
[data-style="earth"] {
    --primary: #92400e;
    --primary-light: #c2410c;
    --primary-dark: #78350f;
    --primary-glow: rgba(146, 64, 14, 0.3);
    --success: #10b981;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #6366f1;
    --border-color: rgba(146, 64, 14, 0.22);
    --border-color-hover: rgba(146, 64, 14, 0.42);
    --text-primary: #fef3c7;
    --text-secondary: #fed7aa;
    --text-muted: #fdba74;
    --bg-body: linear-gradient(135deg, #1c1917 0%, #292524 50%, #44403c 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(41, 37, 36, 0.6);
    --bg-surface-hover: rgba(68, 64, 60, 0.7);
    --bg-card: linear-gradient(135deg, rgba(28,25,23,0.92) 0%, rgba(41,37,36,0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(28,25,23,0.92) 0%, rgba(41,37,36,0.92) 100%);
    --bg-modal: linear-gradient(135deg, #292524 0%, #1c1917 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(28, 25, 23, 0.6);
    --bg-nav: rgba(28, 25, 23, 0.7);
    --bg-nav-hover: rgba(194, 65, 12, 0.15);
    --text-body: #fef3c7;
    --header-bg: linear-gradient(135deg, rgba(146,64,14,0.25) 0%, rgba(194,65,12,0.15) 50%, rgba(217,119,6,0.1) 100%);
    --header-title: linear-gradient(135deg, #fdba74 0%, #fef3c7 100%);
    --th-bg: linear-gradient(135deg, rgba(146,64,14,0.18) 0%, rgba(146,64,14,0.04) 100%);
    --th-line: rgba(146, 64, 14, 0.32);
    --tr-hover: rgba(146, 64, 14, 0.1);
    --accent-color: #92400e;
    --bg-color: #1c1917;
}

/* ---- 15. 森林雾语 (Forest) ---- */
[data-style="forest"] {
    --primary: #059669;
    --primary-light: #34d399;
    --primary-dark: #047857;
    --primary-glow: rgba(5, 150, 105, 0.3);
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #6366f1;
    --border-color: rgba(5, 150, 105, 0.2);
    --border-color-hover: rgba(5, 150, 105, 0.4);
    --text-primary: #064e3b;
    --text-secondary: #065f46;
    --text-muted: #6ee7b7;
    --bg-body: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 50%, #f0fdf4 100%);
    --bg-secondary: rgba(5, 150, 105, 0.04);
    --bg-tertiary: rgba(5, 150, 105, 0.08);
    --bg-surface: rgba(255, 255, 255, 0.9);
    --bg-surface-hover: rgba(255, 255, 255, 1);
    --bg-card: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
    --bg-form: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
    --bg-modal: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
    --bg-input: #ffffff;
    --bg-input-focus: #f0fdf4;
    --bg-nav: rgba(240, 253, 244, 0.9);
    --bg-nav-hover: rgba(52, 211, 153, 0.18);
    --text-body: #064e3b;
    --header-bg: linear-gradient(135deg, #064e3b 0%, #047857 100%);
    --header-title: linear-gradient(135deg, #6ee7b7 0%, #d1fae5 100%);
    --th-bg: linear-gradient(135deg, rgba(5,150,105,0.1) 0%, rgba(5,150,105,0.03) 100%);
    --th-line: rgba(5, 150, 105, 0.22);
    --tr-hover: rgba(52, 211, 153, 0.1);
    --shadow: 0 4px 12px rgba(5, 150, 105, 0.1);
    --shadow-lg: 0 8px 24px rgba(5, 150, 105, 0.15);
    --accent-color: #059669;
    --bg-color: #ffffff;
}
[data-style="forest"] .header h1 { color: #d1fae5; }
[data-style="forest"] .header .date-display { color: #a7f3d0; }

/* ---- 16. 石墨蓝图 (Graphite) ---- */
[data-style="graphite"] {
    --primary: #475569;
    --primary-light: #94a3b8;
    --primary-dark: #1e293b;
    --primary-glow: rgba(71, 85, 105, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(71, 85, 105, 0.22);
    --border-color-hover: rgba(71, 85, 105, 0.42);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --bg-body: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    --bg-secondary: rgba(255, 255, 255, 0.03);
    --bg-tertiary: rgba(255, 255, 255, 0.06);
    --bg-surface: rgba(30, 41, 59, 0.6);
    --bg-surface-hover: rgba(51, 65, 85, 0.75);
    --bg-card: linear-gradient(135deg, rgba(15,23,42,0.9) 0%, rgba(30,41,59,0.95) 100%);
    --bg-form: linear-gradient(135deg, rgba(15,23,42,0.9) 0%, rgba(30,41,59,0.95) 100%);
    --bg-modal: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(15, 23, 42, 0.6);
    --bg-nav: rgba(15, 23, 42, 0.7);
    --bg-nav-hover: rgba(71, 85, 105, 0.2);
    --text-body: #e2e8f0;
    --header-bg: linear-gradient(135deg, rgba(71,85,105,0.25) 0%, rgba(100,116,139,0.15) 50%, rgba(71,85,105,0.1) 100%);
    --header-title: linear-gradient(135deg, #cbd5e1 0%, #e2e8f0 100%);
    --th-bg: linear-gradient(135deg, rgba(71,85,105,0.18) 0%, rgba(71,85,105,0.04) 100%);
    --th-line: rgba(71, 85, 105, 0.32);
    --tr-hover: rgba(71, 85, 105, 0.12);
    --accent-color: #475569;
    --bg-color: #0f172a;
}

/* ---- 17. 玫瑰石英 (Rose Quartz) ---- */
[data-style="rose"] {
    --primary: #f43f5e;
    --primary-light: #fb7185;
    --primary-dark: #be123c;
    --primary-glow: rgba(244, 63, 94, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(244, 63, 94, 0.22);
    --border-color-hover: rgba(244, 63, 94, 0.42);
    --text-primary: #fff1f2;
    --text-secondary: #fecdd3;
    --text-muted: #fda4af;
    --bg-body: linear-gradient(135deg, #4c0519 0%, #881337 50%, #9f1239 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(136, 19, 55, 0.55);
    --bg-surface-hover: rgba(159, 18, 57, 0.7);
    --bg-card: linear-gradient(135deg, rgba(76,5,25,0.9) 0%, rgba(136,19,55,0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(76,5,25,0.9) 0%, rgba(136,19,55,0.92) 100%);
    --bg-modal: linear-gradient(135deg, #881337 0%, #4c0519 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(76, 5, 25, 0.6);
    --bg-nav: rgba(76, 5, 25, 0.7);
    --bg-nav-hover: rgba(244, 63, 94, 0.18);
    --text-body: #fff1f2;
    --header-bg: linear-gradient(135deg, rgba(244,63,94,0.22) 0%, rgba(251,113,133,0.12) 50%, rgba(244,63,94,0.08) 100%);
    --header-title: linear-gradient(135deg, #fda4af 0%, #fff1f2 100%);
    --th-bg: linear-gradient(135deg, rgba(244,63,94,0.18) 0%, rgba(244,63,94,0.04) 100%);
    --th-line: rgba(244, 63, 94, 0.32);
    --tr-hover: rgba(244, 63, 94, 0.1);
    --accent-color: #f43f5e;
    --bg-color: #4c0519;
}

/* ---- 18. 深海探测 (Abyss) ---- */
[data-style="abyss"] {
    --primary: #06b6d4;
    --primary-light: #67e8f9;
    --primary-dark: #0e7490;
    --primary-glow: rgba(6, 182, 212, 0.35);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #6366f1;
    --border-color: rgba(6, 182, 212, 0.22);
    --border-color-hover: rgba(6, 182, 212, 0.42);
    --text-primary: #cffafe;
    --text-secondary: #a5f3fc;
    --text-muted: #67e8f9;
    --bg-body: linear-gradient(135deg, #020617 0%, #0c4a6e 50%, #082f49 100%);
    --bg-secondary: rgba(255, 255, 255, 0.03);
    --bg-tertiary: rgba(255, 255, 255, 0.06);
    --bg-surface: rgba(8, 47, 73, 0.6);
    --bg-surface-hover: rgba(12, 74, 110, 0.75);
    --bg-card: linear-gradient(135deg, rgba(2,6,23,0.92) 0%, rgba(8,47,73,0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(2,6,23,0.92) 0%, rgba(8,47,73,0.92) 100%);
    --bg-modal: linear-gradient(135deg, #082f49 0%, #020617 100%);
    --bg-input: rgba(0, 0, 0, 0.35);
    --bg-input-focus: rgba(2, 6, 23, 0.6);
    --bg-nav: rgba(2, 6, 23, 0.7);
    --bg-nav-hover: rgba(6, 182, 212, 0.18);
    --text-body: #cffafe;
    --header-bg: linear-gradient(135deg, rgba(6,182,212,0.22) 0%, rgba(8,145,178,0.12) 50%, rgba(6,182,212,0.08) 100%);
    --header-title: linear-gradient(135deg, #67e8f9 0%, #cffafe 100%);
    --th-bg: linear-gradient(135deg, rgba(6,182,212,0.18) 0%, rgba(6,182,212,0.04) 100%);
    --th-line: rgba(6, 182, 212, 0.32);
    --tr-hover: rgba(6, 182, 212, 0.1);
    --accent-color: #06b6d4;
    --bg-color: #020617;
}

/* ---- 19. 紫水晶 (Amethyst) ---- */
[data-style="amethyst"] {
    --primary: #a855f7;
    --primary-light: #c084fc;
    --primary-dark: #7e22ce;
    --primary-glow: rgba(168, 85, 247, 0.35);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --border-color: rgba(168, 85, 247, 0.22);
    --border-color-hover: rgba(168, 85, 247, 0.42);
    --text-primary: #faf5ff;
    --text-secondary: #e9d5ff;
    --text-muted: #d8b4fe;
    --bg-body: linear-gradient(135deg, #2e1065 0%, #4c1d95 50%, #581c87 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(76, 29, 149, 0.55);
    --bg-surface-hover: rgba(88, 28, 135, 0.7);
    --bg-card: linear-gradient(135deg, rgba(46,16,101,0.9) 0%, rgba(76,29,149,0.92) 100%);
    --bg-form: linear-gradient(135deg, rgba(46,16,101,0.9) 0%, rgba(76,29,149,0.92) 100%);
    --bg-modal: linear-gradient(135deg, #4c1d95 0%, #2e1065 100%);
    --bg-input: rgba(0, 0, 0, 0.3);
    --bg-input-focus: rgba(46, 16, 101, 0.6);
    --bg-nav: rgba(46, 16, 101, 0.7);
    --bg-nav-hover: rgba(168, 85, 247, 0.18);
    --text-body: #faf5ff;
    --header-bg: linear-gradient(135deg, rgba(168,85,247,0.22) 0%, rgba(192,132,252,0.12) 50%, rgba(168,85,247,0.08) 100%);
    --header-title: linear-gradient(135deg, #d8b4fe 0%, #faf5ff 100%);
    --th-bg: linear-gradient(135deg, rgba(168,85,247,0.18) 0%, rgba(168,85,247,0.04) 100%);
    --th-line: rgba(168, 85, 247, 0.32);
    --tr-hover: rgba(168, 85, 247, 0.1);
    --accent-color: #a855f7;
    --bg-color: #2e1065;
}

/* ---- 20. 暗夜默认 (Default - 默认深色，与深空蓝夜一致) ---- */
[data-style="default"] {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.35);
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --info: #818cf8;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.18);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --bg-body: linear-gradient(135deg, #0f172a 0%, #1e1e3f 50%, #1a1a2e 100%);
    --bg-secondary: rgba(255, 255, 255, 0.04);
    --bg-tertiary: rgba(255, 255, 255, 0.08);
    --bg-surface: rgba(30, 41, 59, 0.6);
    --bg-surface-hover: rgba(30, 41, 59, 0.8);
    --bg-card: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.8) 100%);
    --bg-form: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
    --bg-modal: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --bg-input: rgba(0, 0, 0, 0.35);
    --bg-input-focus: rgba(15, 23, 42, 0.6);
    --bg-nav: rgba(0, 0, 0, 0.15);
    --bg-nav-hover: rgba(255, 255, 255, 0.1);
    --text-body: #f1f5f9;
    --header-bg: linear-gradient(135deg, rgba(99,102,241,0.18) 0%, rgba(34,197,94,0.1) 50%, rgba(59,130,246,0.12) 100%);
    --header-title: linear-gradient(135deg, #a5b4fc 0%, #f1f5f9 100%);
    --th-bg: linear-gradient(135deg, rgba(99,102,241,0.15) 0%, rgba(99,102,241,0.05) 100%);
    --th-line: rgba(99, 102, 241, 0.3);
    --tr-hover: rgba(99, 102, 241, 0.1);
    --accent-color: #6366f1;
    --bg-color: #0f172a;
}

/* ========================================================================
   组件升级样式 - 顶栏、侧边栏、表格、表单
   ======================================================================== */

/* 顶栏升级 - 玻璃效果 + 品牌色 + 高度优化 */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.header:hover {
    box-shadow: var(--shadow-lg);
}
.header h1 {
    font-size: 22px;
    font-weight: 700;
    background: var(--header-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
    line-height: 1.2;
}
.header .date-display {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 主题切换器 - 21套风格下拉框 */
.theme-select-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
}
.theme-select-wrap select {
    appearance: none;
    -webkit-appearance: none;
    padding: 6px 28px 6px 10px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}
.theme-select-wrap select:hover {
    background: var(--bg-nav-hover);
    color: var(--text-primary);
    border-color: var(--border-color-hover);
}
.theme-select-wrap select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}
.theme-select-wrap::after {
    content: '▾';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 10px;
    pointer-events: none;
}
.theme-select-wrap select option {
    background: var(--bg-modal);
    color: var(--text-primary);
    padding: 6px;
}

/* 侧边栏导航 - 现代化 */
.sidebar {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: var(--bg-nav);
}
.nav-tab {
    border-left: 3px solid transparent;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.nav-tab:hover {
    background: var(--bg-nav-hover);
    color: var(--text-primary);
    transform: translateX(2px);
    border-left-color: var(--primary);
}
.nav-tab.active {
    background: linear-gradient(90deg, var(--primary-glow) 0%, transparent 100%);
    color: var(--primary-light);
    border-left-color: var(--primary);
    font-weight: 600;
}
.nav-tab.active::after {
    content: '';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary-glow);
}

/* 表格升级 - 悬停高亮 + 斑马纹 + 圆角 */
.data-table {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.data-table th {
    background: var(--th-bg);
    color: var(--text-secondary);
    border-bottom: 2px solid var(--th-line);
    position: relative;
    font-weight: 600;
}
.data-table tbody tr {
    transition: all 0.2s ease;
}
.data-table tbody tr:hover {
    background: var(--tr-hover);
    transform: translateX(2px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 表单容器升级 - 玻璃卡片 */
.form-container {
    background: var(--bg-card) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.form-container:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--border-color-hover);
    transform: translateY(-1px);
}
.form-container h3 {
    background: var(--header-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 输入框 focus 增强 */
.form-group input,
.form-group select,
.form-group textarea {
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-primary);
}
.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--border-color-hover);
    background: var(--bg-input-focus);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    outline: none;
    background: var(--bg-input-focus);
}

/* 按钮升级 - 主题色悬停 + 微动效 */
.btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
    filter: brightness(1.1);
}
.btn:active {
    transform: translateY(0);
    filter: brightness(0.95);
}

/* 登录页升级 - 固定浅色（不受主题切换影响） */
.login-box {
    background: #ffffff !important;
    border: 1px solid rgba(99,102,241,0.12) !important;
    box-shadow: 0 25px 50px rgba(99,102,241,0.15), 0 10px 20px rgba(0,0,0,0.08) !important;
    color: #1e293b !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.login-box h2 {
    background: none !important;
    -webkit-background-clip: unset !important;
    background-clip: unset !important;
    -webkit-text-fill-color: #1e293b !important;
    color: #1e293b !important;
}
.login-box .subtitle { color: #64748b !important; }
.login-box label { color: #475569 !important; }
.login-box input {
    background: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    color: #1e293b !important;
}
.login-box input::placeholder { color: #cbd5e1 !important; }
.login-box .login-error { color: #ef4444 !important; }
.login-box .register-link { color: #64748b !important; }

/* 备案栏升级 */
.beian-bar {
    background: var(--bg-color, var(--bg-nav)) !important;
    border-top: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* AI 小精灵容器 */
#niu2-container {
    position: fixed;
    bottom: 80px;
    right: 20px;
    z-index: 999999;
    cursor: pointer;
    user-select: none;
}
#niu2-fab {
    width: 60px;
    height: 60px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(0,0,0,0.25);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: niu2-float 3s ease-in-out infinite;
}
#niu2-fab img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #fff;
}
#niu2-fab:hover {
    transform: scale(1.12);
    box-shadow: 0 8px 28px var(--primary-glow);
    animation: niu2-pulse 1s ease-in-out infinite;
}
#niu2-panel {
    position: absolute;
    bottom: 75px;
    right: 0;
    width: 320px;
    max-height: 480px;
    background: var(--bg-card);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    display: none;
    flex-direction: column;
    overflow: visible;
    z-index: 999999;
}
#niu2-panel.show { display: flex; }
#niu2-panel-header {
    padding: 14px 16px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    border-radius: 16px 16px 0 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
}
#niu2-panel-body {
    flex: 1;
    padding: 12px 16px;
    overflow-y: auto;
    max-height: 320px;
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.6;
}
#niu2-panel-input {
    padding: 10px 12px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
    background: var(--bg-form);
    border-radius: 0 0 16px 16px;
}
#niu2-panel-input input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
}
#niu2-panel-input input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}
#niu2-panel-input button {
    padding: 8px 14px;
    border: none;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
#niu2-panel-input button:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}
#niu2-bubble {
    position: absolute;
    bottom: 70px;
    right: 70px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px 12px;
    font-size: 12px;
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    display: none;
    white-space: nowrap;
    z-index: 999999;
    animation: niu2-fadeIn 0.3s ease;
}
#niu2-bubble.show { display: block; }

@keyframes niu2-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
@keyframes niu2-pulse {
    0%, 100% { box-shadow: 0 4px 16px var(--primary-glow); }
    50% { box-shadow: 0 4px 28px var(--primary-glow), 0 0 16px var(--primary-glow); }
}
@keyframes niu2-fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes niu2-shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-3px); }
    40%, 80% { transform: translateX(3px); }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
    transition: all 0.2s;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* 选中文字颜色 */
::selection {
    background: var(--primary-glow);
    color: var(--text-primary);
}

/* 主题切换动画 */
.header, .sidebar, .form-container, .data-table, .login-box, .btn {
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}