:root {
            --fa-blue: #002FA7;
            --fa-blue-deep: #001a5e;
            --fa-blue-light: #0044cc;
            --fa-gold: #F5B942;
            --fa-gold-soft: #fbbf24;
            --bg: #f0f4ff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html, body {
            font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text-primary);
            min-height: 100vh;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 24px;
            overflow-x: hidden;
            position: relative;
        }

        /* 页面背景装饰 */
        body::before {
            content: '';
            position: fixed;
            top: -200px;
            left: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0,47,167,0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        body::after {
            content: '';
            position: fixed;
            bottom: -300px;
            right: -200px;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(245,185,66,0.05), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .login-wrap {
            display: flex;
            width: 100%;
            max-width: 1040px;
            background: #fff;
            border-radius: 28px;
            box-shadow:
                0 1px 2px rgba(15,23,42,0.04),
                0 12px 32px rgba(0,47,167,0.08),
                0 32px 64px rgba(0,47,167,0.04);
            overflow: hidden;
            min-height: 600px;
            position: relative;
            z-index: 1;
        }

        .brand-side {
            flex: 1.1;
            background:
                radial-gradient(circle at 20% 80%, rgba(245,185,66,0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255,255,255,0.08) 0%, transparent 40%),
                linear-gradient(135deg, #002FA7 0%, #0040b0 40%, #1e40af 100%);
            color: #fff;
            padding: 64px 56px;
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            overflow: hidden;
        }
        /* 圆点网格背景 */
        .brand-side::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle, rgba(255,255,255,0.07) 1px, transparent 1px);
            background-size: 22px 22px;
            opacity: 0.5;
            pointer-events: none;
        }
        /* 装饰几何图形 */
        .brand-deco-1 {
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(245,185,66,0.2), rgba(245,185,66,0.04));
            filter: blur(2px);
        }
        .brand-deco-2 {
            position: absolute;
            bottom: 40px;
            right: -40px;
            width: 120px;
            height: 120px;
            border: 2px solid rgba(245,185,66,0.25);
            border-radius: 50%;
        }
        .brand-deco-3 {
            position: absolute;
            top: 30%;
            right: 15%;
            width: 60px;
            height: 60px;
            background: rgba(245,185,66,0.12);
            border-radius: 16px;
            transform: rotate(15deg);
        }

        .brand-top { position: relative; z-index: 1; }
        .brand-logo-row {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        /* logo容器 - 磨砂玻璃效果融入背景 */
        .brand-logo-box {
            background: rgba(255,255,255,0.95);
            border-radius: 16px;
            padding: 8px 14px;
            backdrop-filter: blur(10px);
            box-shadow:
                0 2px 8px rgba(0,0,0,0.08),
                inset 0 1px 0 rgba(255,255,255,0.6);
            border: 1px solid rgba(255,255,255,0.5);
        }
        .brand-logo-box img {
            height: 32px;
            width: auto;
            display: block;
        }
        .brand-name-block {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .brand-name-cn {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1.5px;
        }
        .brand-name-en {
            font-size: 10px;
            color: var(--fa-gold);
            letter-spacing: 2.5px;
            font-weight: 600;
        }

        .brand-center {
            position: relative;
            z-index: 1;
            margin: 56px 0;
        }
        .brand-hi {
            font-size: 14px;
            font-weight: 500;
            color: var(--fa-gold);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .brand-title {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.1;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .brand-title .highlight {
            background: linear-gradient(90deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .brand-desc {
            font-size: 15px;
            color: rgba(255,255,255,0.78);
            line-height: 1.7;
            max-width: 340px;
            font-weight: 400;
        }

        .brand-stats {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 32px;
        }
        .brand-stat {
            display: flex;
            flex-direction: column;
        }
        .brand-stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1;
        }
        .brand-stat-num .plus {
            color: var(--fa-gold);
            margin-left: 2px;
        }
        .brand-stat-label {
            font-size: 12px;
            color: rgba(255,255,255,0.6);
            margin-top: 6px;
            font-weight: 500;
        }

        .login-side {
            flex: 0.9;
            padding: 64px 56px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            background: #fff;
            min-width: 0;
        }
        .login-header { margin-bottom: 36px; }
        .login-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: -0.3px;
        }
        .login-subtitle {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* B站登录按钮 */
        .bili-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            width: 100%;
            padding: 18px 24px;
            background: linear-gradient(135deg, #00AEEC 0%, #0091C7 100%);
            color: #fff;
            border: none;
            border-radius: 16px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow:
                0 4px 14px rgba(0,174,236,0.25),
                0 1px 3px rgba(0,174,236,0.1);
            font-family: inherit;
            position: relative;
            overflow: hidden;
        }
        .bili-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.6s ease;
        }
        .bili-btn:hover::before { left: 100%; }
        .bili-btn:hover {
            transform: translateY(-2px);
            box-shadow:
                0 8px 24px rgba(0,174,236,0.35),
                0 2px 6px rgba(0,174,236,0.15);
        }
        .bili-btn:active { transform: translateY(0); }
        .bili-btn-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }
        .bili-btn-text {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.2;
        }
        .bili-btn-main {
            font-size: 16px;
            font-weight: 600;
        }
        .bili-btn-sub {
            font-size: 11px;
            color: rgba(255,255,255,0.8);
            font-weight: 400;
            margin-top: 3px;
        }

        /* 分隔线 */
        .login-divider {
            display: flex;
            align-items: center;
            gap: 16px;
            margin: 28px 0 20px;
            color: var(--text-muted);
            font-size: 12px;
            font-weight: 500;
        }
        .login-divider::before, .login-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border), transparent);
        }

        /* 安全提示 */
        .security-note {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 18px;
            background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
            border: 1px solid #e0e7ff;
            border-radius: 14px;
        }
        .security-icon {
            width: 36px;
            height: 36px;
            background: rgba(0,47,167,0.08);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .security-icon svg {
            width: 18px;
            height: 18px;
            color: var(--fa-blue);
        }
        .security-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .security-text strong {
            color: var(--fa-blue);
            font-weight: 600;
        }

        .local-login {
            margin-top: 22px;
            padding: 16px 16px 14px;
            border: 1px dashed #cbd5e1;
            border-radius: 16px;
            background: #f8fafc;
        }
        .local-login .login-divider {
            margin: 0 0 14px;
        }
        .local-login label {
            display: block;
            margin-bottom: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
        }
        .local-login-row {
            display: flex;
            gap: 10px;
        }
        .local-login input[type="text"] {
            flex: 1;
            min-width: 0;
            height: 48px;
            padding: 0 14px;
            border: 1px solid var(--border);
            border-radius: 12px;
            background: #fff;
            color: var(--text-primary);
            font: inherit;
            font-size: 15px;
        }
        .local-login input[type="text"]:focus {
            outline: 2px solid rgba(0, 47, 167, 0.25);
            border-color: var(--fa-blue);
        }
        .local-login button {
            height: 48px;
            padding: 0 16px;
            border: none;
            border-radius: 12px;
            background: var(--fa-blue);
            color: #fff;
            font: inherit;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            cursor: pointer;
        }
        .local-login button:hover {
            background: var(--fa-blue-light);
        }
        .local-login-error {
            margin-top: 10px;
            color: #b91c1c;
            font-size: 13px;
            line-height: 1.5;
        }
        .local-login-hint {
            margin-top: 10px;
            color: var(--text-muted);
            font-size: 12px;
            line-height: 1.5;
        }

        /* 页脚 */
        .login-footer {
            text-align: center;
            margin-top: 36px;
            color: var(--text-muted);
            font-size: 12px;
        }
        .login-footer a {
            display: inline-flex;
            align-items: center;
            min-height: 44px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
        }
        .login-footer a:hover { color: var(--fa-blue); }
        .footer-dot {
            margin: 0 6px;
            color: var(--border);
        }

        @media (max-width: 900px) {
            body { padding: 0; }
            .login-wrap {
                flex-direction: column;
                border-radius: 0;
                min-height: 100vh;
                max-width: 100%;
            }
            .brand-side {
                padding: 40px 32px 32px;
                min-height: auto;
            }
            .brand-deco-1 {
                top: -70px;
                right: 8px;
                width: 140px;
                height: 140px;
            }
            .brand-deco-2 {
                right: 20px;
                width: 96px;
                height: 96px;
            }
            .brand-center { margin: 32px 0; }
            .brand-title { font-size: 32px; }
            .brand-stats { gap: 24px; }
            .brand-stat-num { font-size: 22px; }
            .login-side {
                padding: 40px 32px;
                flex: 1;
            }
        }
        @media (max-width: 400px) {
            .brand-side { padding: 32px 24px; }
            .login-side { padding: 32px 24px; }
            .brand-title { font-size: 28px; }
            .login-title { font-size: 22px; }
            .local-login-row { flex-direction: column; }
            .local-login button { width: 100%; }
        }

        /* 动画 */
        @media (prefers-reduced-motion: no-preference) {
            .login-wrap {
                animation: cardIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
            }
            @keyframes cardIn {
                from { opacity: 0; transform: translateY(20px); }
                to { opacity: 1; transform: translateY(0); }
            }
        }