* { box-sizing: border-box; margin: 0; padding: 0; }
        html { -webkit-text-size-adjust: 100%; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            color: #1a1a1a;
            background: #F6F5F1FF;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            line-height: 1.6;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        header {
            border-bottom: 1px solid #e5e5e5;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        header .brand {
            font-size: 17px;
            font-weight: 600;
            color: #1a1a1a;
            text-decoration: none;
            letter-spacing: -0.01em;
        }
        header nav {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        header nav a,
        header nav button {
            color: #666;
            text-decoration: none;
            font-size: 14px;
            background: none;
            border: none;
            cursor: pointer;
            font-family: inherit;
            transition: color .15s;
        }
        header nav a:hover,
        header nav button:hover { color: #1a1a1a; }
        header nav span {
            font-size: 13px;
            color: #999;
        }
        header nav .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
        }
        header nav .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #1a1a1a;
            border-radius: 2px;
            transition: .2s;
        }
        header nav .menu-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
        header nav .menu-toggle.active span:nth-child(2) { opacity: 0; }
        header nav .menu-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

        header nav .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        header .global-search {
            display: flex;
            align-items: center;
            gap: 0;
            flex: 1;
            max-width: 520px;
            margin: 0 32px;
        }
        header .global-search input {
            flex: 1;
            padding: 10px 16px;
            border: 1px solid #e5e5e5;
            border-right: none;
            font-size: 15px;
            font-family: inherit;
            background: #fff;
            outline: none;
            transition: border-color .15s;
        }
        header .global-search input:focus { border-color: #1a1a1a; }
        header .global-search button {
            padding: 10px 22px;
            background: #1a1a1a;
            color: #fff;
            border: 1px solid #1a1a1a;
            cursor: pointer;
            font-size: 14px;
            font-family: inherit;
            transition: background .15s;
        }
        header .global-search button:hover { background: #000; }

        main {
            flex: 1;
            width: 100%;
            max-width: 480px;
            margin: 60px auto;
            padding: 0 20px;
        }
        main.wide { max-width: 960px; }

        .card h2 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 28px;
            text-align: center;
            letter-spacing: -0.01em;
        }

        .form-row { margin-bottom: 18px; }
        .form-row label {
            display: block;
            font-size: 13px;
            color: #555;
            margin-bottom: 6px;
        }
        .form-row input,
        .form-row select {
            width: 100%;
            padding: 10px 12px;
            border: 1px solid #e5e5e5;
            border-radius: 0;
            font-size: 15px;
            font-family: inherit;
            background: #fff;
            transition: border-color .15s;
        }
        .form-row input:focus,
        .form-row select:focus {
            outline: none;
            border-color: #1a1a1a;
        }
        .form-row small { color: #999; font-size: 12px; }

        .errorlist { list-style: none; color: #d93025; font-size: 12px; margin-top: 5px; }
        .errorlist.nonfield {
            margin-bottom: 14px;
            padding: 10px 12px;
            background: #fef7f7;
            border-left: 2px solid #d93025;
        }

        .btn {
            display: block;
            width: 100%;
            padding: 11px 24px;
            background: #1a1a1a;
            color: #fff;
            border: none;
            border-radius: 0;
            font-size: 15px;
            font-family: inherit;
            cursor: pointer;
            transition: background .15s;
        }
        .btn:hover { background: #000; }
        .btn.secondary { background: #fff; color: #1a1a1a; border: 1px solid #1a1a1a; }
        .btn.secondary:hover { background: #1a1a1a; color: #fff; }

        .messages { margin-bottom: 24px; }
        .messages .msg {
            padding: 10px 14px;
            font-size: 13px;
            margin-bottom: 8px;
            border-left: 2px solid;
        }
        .messages .msg.success { background: #f3fbf4; border-color: #2e7d32; color: #2e7d32; }
        .messages .msg.error,
        .messages .msg.danger { background: #fef7f7; border-color: #d93025; color: #d93025; }
        .messages .msg.warning { background: #fffbea; border-color: #f57f17; color: #b25b00; }
        .messages .msg.info { background: #f0f6ff; border-color: #1967d2; color: #1967d2; }

        .links {
            text-align: center;
            margin-top: 20px;
            font-size: 13px;
            color: #888;
        }
        .links a { color: #1a1a1a; text-decoration: underline; }
        .links a:hover { color: #000; }

        footer {
            text-align: center;
            padding: 24px 20px;
            font-size: 12px;
            color: #bbb;
            border-top: 1px solid #f0f0f0;
        }
        footer a {
            color: #bbb;
            text-decoration: none;
            margin-left: 14px;
            transition: color .15s;
        }
        footer a:hover { color: #888; }

        @media (max-width: 768px) {
            header { padding: 0 12px; height: auto; min-height: 52px; gap: 8px; flex-wrap: wrap; position: relative; }
            header .brand { font-size: 15px; flex-shrink: 0; }
            header .global-search { margin: 0 8px; max-width: none; flex: 1; min-width: 0; order: 3; width: 100%; margin: 0; padding: 8px 0; border-top: 1px solid #f0f0f0; border-bottom: 1px solid #f0f0f0; }
            header .global-search input { font-size: 13px; padding: 6px 8px; }
            header .global-search button { padding: 6px 10px; font-size: 12px; }
            header nav { gap: 8px; flex-shrink: 0; }
            header nav .menu-toggle { display: flex; }
            header nav .nav-wrapper {
                display: none;
                position: absolute;
                top: 100%;
                right: 12px;
                left: 12px;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background: #fff;
                border: 1px solid #e5e5e5;
                box-shadow: 0 4px 12px rgba(0,0,0,.08);
                padding: 8px 0;
                z-index: 100;
            }
            header nav .nav-wrapper.open { display: flex; }
            header nav .nav-wrapper a,
            header nav .nav-wrapper button,
            header nav .nav-wrapper form {
                display: block;
                width: 100%;
                text-align: left;
                padding: 12px 16px;
                margin: 0;
                border-bottom: 1px solid #f5f5f5;
            }
            header nav .nav-wrapper form { border: none; padding: 0; }
            header nav .nav-wrapper form button { border: none; }
            header nav .nav-wrapper span {
                display: block;
                padding: 12px 16px;
                border-bottom: 1px solid #f5f5f5;
            }
            header nav .nav-wrapper span a {
                padding: 0;
                border: none;
                display: inline;
            }

            main { margin: 32px auto; padding: 0 16px; }

            .card h2 { font-size: 18px; margin-bottom: 24px; }
            body { font-size: 16px; }
            .form-row input,
            .form-row select { font-size: 16px; padding: 12px; }
            .btn { font-size: 16px; padding: 12px; }
        }