* { box-sizing: border-box; }

        body {
            margin: 0;
            padding: 0;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: linear-gradient(135deg, #0b7a78 0%, #0d9488 45%, #0f766e 100%);
            background-size: 300% 300%;
            animation: gradientBG 18s ease infinite;
            overflow: hidden;
        }

        /* 现代感网格光晕：缓慢漂移，营造纵深与层次 */
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background:
                radial-gradient(circle at 18% 22%, rgba(45, 212, 191, 0.45), transparent 42%),
                radial-gradient(circle at 82% 18%, rgba(94, 234, 212, 0.30), transparent 40%),
                radial-gradient(circle at 65% 85%, rgba(15, 118, 110, 0.55), transparent 48%),
                radial-gradient(circle at 30% 75%, rgba(13, 148, 136, 0.35), transparent 45%);
            background-size: 200% 200%;
            animation: meshDrift 24s ease-in-out infinite;
            filter: blur(8px);
        }

        @keyframes gradientBG {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        @keyframes meshDrift {
            0%   { background-position:   0%   0%; }
            50%  { background-position: 100% 100%; }
            100% { background-position:   0%   0%; }
        }

        /* 装饰几何元素 */
        .bg-decoration {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            overflow: hidden;
        }

        .bg-decoration .shape {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.16);
            filter: blur(6px);
        }

        .bg-decoration .shape-1 {
            width: 400px;
            height: 400px;
            top: -100px;
            right: -100px;
            animation: float1 8s ease-in-out infinite;
        }

        .bg-decoration .shape-2 {
            width: 300px;
            height: 300px;
            bottom: -80px;
            left: -80px;
            animation: float2 10s ease-in-out infinite;
        }

        .bg-decoration .shape-3 {
            width: 150px;
            height: 150px;
            top: 40%;
            left: 10%;
            animation: float3 6s ease-in-out infinite;
        }

        .bg-decoration .shape-4 {
            width: 200px;
            height: 200px;
            bottom: 20%;
            right: 15%;
            animation: float1 9s ease-in-out infinite reverse;
        }

        @keyframes float1 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(30px, -30px) scale(1.05); }
        }

        @keyframes float2 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(-20px, 20px) scale(1.08); }
        }

        @keyframes float3 {
            0%, 100% { transform: translate(0, 0); }
            50% { transform: translate(15px, -15px); }
        }

        /* 漂浮图标装饰（小程序 / 开发相关） */
        .bg-icons {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            overflow: hidden;
        }

        .bg-icons .ficon {
            position: absolute;
            bottom: -60px;
            color: #ffffff;
            opacity: 0;
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.25)) drop-shadow(0 0 6px rgba(255, 255, 255, 0.55));
            animation-name: floatUp;
            animation-timing-function: linear;
            animation-iteration-count: infinite;
            will-change: transform, opacity;
        }

        @keyframes floatUp {
            0%   { transform: translateY(0)         scale(0.9)  rotate(0deg);   opacity: 0; }
            10%  { opacity: 0.62; }
            85%  { opacity: 0.62; }
            100% { transform: translateY(-118vh)   scale(1.15) rotate(10deg);   opacity: 0; }
        }

        .bg-icons .ficon-1  { left: 7%;  font-size: 34px; animation-duration: 22s; animation-delay: 0s; }
        .bg-icons .ficon-2  { left: 17%; font-size: 26px; animation-duration: 27s; animation-delay: 4s; }
        .bg-icons .ficon-3  { left: 27%; font-size: 42px; animation-duration: 18s; animation-delay: 9s; }
        .bg-icons .ficon-4  { left: 37%; font-size: 30px; animation-duration: 25s; animation-delay: 2s; }
        .bg-icons .ficon-5  { left: 47%; font-size: 36px; animation-duration: 23s; animation-delay: 12s; }
        .bg-icons .ficon-6  { left: 57%; font-size: 28px; animation-duration: 29s; animation-delay: 6s; }
        .bg-icons .ficon-7  { left: 67%; font-size: 44px; animation-duration: 20s; animation-delay: 14s; }
        .bg-icons .ficon-8  { left: 76%; font-size: 24px; animation-duration: 26s; animation-delay: 3s; }
        .bg-icons .ficon-9  { left: 85%; font-size: 32px; animation-duration: 24s; animation-delay: 10s; }
        .bg-icons .ficon-10 { left: 93%; font-size: 28px; animation-duration: 21s; animation-delay: 7s; }

        @media (prefers-reduced-motion: reduce) {
            .bg-icons .ficon { animation: none; opacity: 0.18; }
            .login-waves .wave { animation: none; }
            body::before { animation: none; }
        }

        /* ============ 底部海浪（多层叠加，营造大海波浪感） ============ */
        .login-waves {
            position: fixed;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 30vh;
            min-height: 190px;
            pointer-events: none;
            z-index: 1;
            overflow: hidden;
        }

        .login-waves .wave {
            position: absolute;
            left: 0;
            bottom: 0;
            width: 200%;
            height: 100%;
            background-repeat: repeat-x;
            background-position: 0 bottom;
            background-size: 50% 100%;
            will-change: transform;
        }

        /* 远层：浅青，慢速 */
        .login-waves .wave-1 {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1440' height='160' viewBox='0 0 1440 160'%3E%3Cpath d='M0,80 C240,140 480,20 720,80 C960,140 1200,20 1440,80 L1440,160 L0,160 Z' fill='%232dd4bf' fill-opacity='0.28'/%3E%3C/svg%3E");
            animation: waveMove 15s linear infinite;
            opacity: 0.9;
        }

        /* 中层：主题青绿，反向，中速 */
        .login-waves .wave-2 {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1440' height='160' viewBox='0 0 1440 160'%3E%3Cpath d='M0,90 C300,30 540,150 720,90 C900,30 1140,150 1440,90 L1440,160 L0,160 Z' fill='%230d9488' fill-opacity='0.35'/%3E%3C/svg%3E");
            animation: waveMove 10s linear infinite reverse;
            opacity: 0.85;
            height: 86%;
        }

        /* 近层：深青，快速，置于最前 */
        .login-waves .wave-3 {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1440' height='160' viewBox='0 0 1440 160'%3E%3Cpath d='M0,70 C360,150 720,10 1080,80 C1260,115 1350,60 1440,90 L1440,160 L0,160 Z' fill='%230f766e' fill-opacity='0.45'/%3E%3C/svg%3E");
            animation: waveMove 22s linear infinite;
            opacity: 0.95;
            height: 72%;
        }

        @keyframes waveMove {
            0%   { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* 登录容器 - 改为居中竖向卡片 + 顶部品牌条，区别于原左右分栏排版 */
        .login-container {
            position: relative;
            z-index: 10;
            display: flex;
            flex-direction: column;
            width: 440px;
            max-width: 95vw;
            background: rgba(255, 255, 255, 0.96);
            border-radius: 20px;
            box-shadow: 0 24px 70px rgba(0, 0, 0, 0.18), 0 8px 24px rgba(13, 148, 136, 0.12);
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        /* 顶部品牌条（原为左侧整栏，现改为顶部横条，排版明显不同） */
        .login-left {
            display: flex;
            flex-direction: row;
            align-items: center;
            gap: 14px;
            padding: 22px 26px;
            background: linear-gradient(135deg, #0d9488 0%, #2dd4bf 100%);
            position: relative;
            overflow: hidden;
        }

        .login-left::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 60%);
            animation: rotateCircle 20s linear infinite;
        }

        .login-left .left-icon {
            font-size: 38px;
            color: rgba(255, 255, 255, 0.95);
            position: relative;
            z-index: 1;
        }

        .login-left .left-title {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            position: relative;
            z-index: 1;
        }

        .login-left .left-desc {
            display: none;
        }

        /* 右侧表单 */
        .login-right {
            padding: 36px 23px 44px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .login-right .form-title {
            font-size: 24px;
            font-weight: 600;
            color: #303133;
            margin-bottom: 8px;
        }

        .login-right .form-subtitle {
            font-size: 14px;
            color: #64748b;
            margin-bottom: 36px;
        }

        /* 表单字段 */
        .form-field {
            margin-bottom: 24px;
            position: relative;
        }

        .form-field .field-label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: #606266;
            margin-bottom: 8px;
        }

        .form-field .field-input {
            position: relative;
        }

        .form-field .field-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: #C0C4CC;
            font-size: 15px;
            transition: color 0.3s;
            z-index: 2;
        }

        .form-field input[type="text"],
        .form-field input[type="password"] {
            width: 100%;
            height: 44px;
            padding: 0 14px 0 42px;
            border: 1px solid #DCDFE6;
            border-radius: 8px;
            font-size: 14px;
            color: #303133;
            background: #fff;
            transition: all 0.25s;
            outline: none;
        }

        .form-field input:focus {
            border-color: #0d9488;
            box-shadow: 0 0 0 2px rgba(13, 148, 136, 0.2);
        }

        .form-field input:focus + .field-icon,
        .form-field input:focus ~ .field-icon {
            color: #0d9488;
        }

        .form-field input::placeholder {
            color: #C0C4CC;
        }

        /* 密码可见切换 */
        .changeeye {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #C0C4CC;
            font-size: 15px;
            z-index: 2;
            transition: color 0.25s;
        }

        .changeeye:hover {
            color: #64748b;
        }

        /* 验证码行 */
        .captcha-row {
            display: flex;
            gap: 12px;
            align-items: stretch;
        }

        .captcha-row input {
            flex: 1;
        }

        .captcha-row .captcha-img {
            height: 44px;
            border-radius: 8px;
            cursor: pointer;
            border: 1px solid #DCDFE6;
            flex-shrink: 0;
        }

        /* 登录按钮 */
        .btn-login {
            width: 100%;
            height: 44px;
            border: none;
            border-radius: 8px;
            background: linear-gradient(135deg, #0d9488, #2dd4bf);
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            letter-spacing: 2px;
        }

        .btn-login:hover {
            background: linear-gradient(135deg, #2dd4bf, #0d9488);
            box-shadow: 0 4px 16px rgba(13, 148, 136, 0.4);
            transform: translateY(-1px);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .btn-login .login-icon {
            font-size: 16px;
        }

        /* 错误提示 */
        #errtips {
            padding: 10px 14px;
            margin-bottom: 20px;
            border-radius: 8px;
            background: #fff1f2;
            color: #e11d48;
            font-size: 13px;
            border: 1px solid #FDE2E2;
            display: none;
        }

        #errtips:not(.hide) {
            display: block;
        }

        /* toast 样式覆盖 */
        .toast-message {
            color: #fff !important;
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .login-container {
                width: 95vw;
                max-width: 440px;
            }

            .login-right {
                padding: 30px 26px 36px;
            }
        }

        @media (max-width: 400px) {
            .login-right {
                padding: 30px 20px;
            }

            .form-field input[type="text"],
            .form-field input[type="password"] {
                height: 40px;
                font-size: 13px;
            }

            .btn-login {
                height: 40px;
                font-size: 15px;
            }
        }